src/crypto/tls_openssl.c

   1 /*
   2  * SSL/TLS interface functions for OpenSSL
   3  * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #ifndef CONFIG_SMARTCARD
  12 #ifndef OPENSSL_NO_ENGINE
  13 #ifndef ANDROID
  14 #define OPENSSL_NO_ENGINE
  15 #endif
  16 #endif
  17 #endif
  18
  19 #include <openssl/ssl.h>
  20 #include <openssl/err.h>
  21 #include <openssl/pkcs12.h>
  22 #include <openssl/x509v3.h>
  23 #ifndef OPENSSL_NO_ENGINE
  24 #include <openssl/engine.h>
  25 #endif /* OPENSSL_NO_ENGINE */
  26
  27 #include "common.h"
  28 #include "crypto.h"
  29 #include "tls.h"
  30
  31 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
  32 #define OPENSSL_d2i_TYPE const unsigned char **
  33 #else
  34 #define OPENSSL_d2i_TYPE unsigned char **
  35 #endif
  36
  37 #if defined(SSL_CTX_get_app_data) && defined(SSL_CTX_set_app_data)
  38 #define OPENSSL_SUPPORTS_CTX_APP_DATA
  39 #endif
  40
  41 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
  42 #ifdef SSL_OP_NO_TICKET
  43 /*
  44  * Session ticket override patch was merged into OpenSSL 0.9.9 tree on
  45  * 2008-11-15. This version uses a bit different API compared to the old patch.
  46  */
  47 #define CONFIG_OPENSSL_TICKET_OVERRIDE
  48 #endif
  49 #endif
  50
  51 #ifdef SSL_set_tlsext_status_type
  52 #ifndef OPENSSL_NO_TLSEXT
  53 #define HAVE_OCSP
  54 #include <openssl/ocsp.h>
  55 #endif /* OPENSSL_NO_TLSEXT */
  56 #endif /* SSL_set_tlsext_status_type */
  57
  58 #ifdef ANDROID
  59 #include <openssl/pem.h>
  60 #include <keystore/keystore_get.h>
  61
  62 static BIO * BIO_from_keystore(const char *key)
  63 {
  64         BIO *bio = NULL;
  65         uint8_t *value = NULL;
  66         int length = keystore_get(key, strlen(key), &value);
  67         if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
  68                 BIO_write(bio, value, length);
  69         free(value);
  70         return bio;
  71 }
  72 #endif /* ANDROID */
  73
  74 static int tls_openssl_ref_count = 0;
  75
  76 struct tls_context {
  77         void (*event_cb)(void *ctx, enum tls_event ev,
  78                          union tls_event_data *data);
  79         void *cb_ctx;
  80         int cert_in_cb;
  81         char *ocsp_stapling_response;
  82 };
  83
  84 static struct tls_context *tls_global = NULL;
  85
  86
  87 struct tls_connection {
  88         struct tls_context *context;
  89         SSL *ssl;
  90         BIO *ssl_in, *ssl_out;
  91 #ifndef OPENSSL_NO_ENGINE
  92         ENGINE *engine;        /* functional reference to the engine */
  93         EVP_PKEY *private_key; /* the private key if using engine */
  94 #endif /* OPENSSL_NO_ENGINE */
  95         char *subject_match, *altsubject_match, *suffix_match;
  96         int read_alerts, write_alerts, failed;
  97
  98         tls_session_ticket_cb session_ticket_cb;
  99         void *session_ticket_cb_ctx;
 100
 101         /* SessionTicket received from OpenSSL hello_extension_cb (server) */
 102         u8 *session_ticket;
 103         size_t session_ticket_len;
 104
 105         unsigned int ca_cert_verify:1;
 106         unsigned int cert_probe:1;
 107         unsigned int server_cert_only:1;
 108
 109         u8 srv_cert_hash[32];
 110
 111         unsigned int flags;
 112
 113         X509 *peer_cert;
 114         X509 *peer_issuer;
 115         X509 *peer_issuer_issuer;
 116 };
 117
 118
 119 static struct tls_context * tls_context_new(const struct tls_config *conf)
 120 {
 121         struct tls_context *context = os_zalloc(sizeof(*context));
 122         if (context == NULL)
 123                 return NULL;
 124         if (conf) {
 125                 context->event_cb = conf->event_cb;
 126                 context->cb_ctx = conf->cb_ctx;
 127                 context->cert_in_cb = conf->cert_in_cb;
 128         }
 129         return context;
 130 }
 131
 132
 133 #ifdef CONFIG_NO_STDOUT_DEBUG
 134
 135 static void _tls_show_errors(void)
 136 {
 137         unsigned long err;
 138
 139         while ((err = ERR_get_error())) {
 140                 /* Just ignore the errors, since stdout is disabled */
 141         }
 142 }
 143 #define tls_show_errors(l, f, t) _tls_show_errors()
 144
 145 #else /* CONFIG_NO_STDOUT_DEBUG */
 146
 147 static void tls_show_errors(int level, const char *func, const char *txt)
 148 {
 149         unsigned long err;
 150
 151         wpa_printf(level, "OpenSSL: %s - %s %s",
 152                    func, txt, ERR_error_string(ERR_get_error(), NULL));
 153
 154         while ((err = ERR_get_error())) {
 155                 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
 156                            ERR_error_string(err, NULL));
 157         }
 158 }
 159
 160 #endif /* CONFIG_NO_STDOUT_DEBUG */
 161
 162
 163 #ifdef CONFIG_NATIVE_WINDOWS
 164
 165 /* Windows CryptoAPI and access to certificate stores */
 166 #include <wincrypt.h>
 167
 168 #ifdef __MINGW32_VERSION
 169 /*
 170  * MinGW does not yet include all the needed definitions for CryptoAPI, so
 171  * define here whatever extra is needed.
 172  */
 173 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
 174 #define CERT_STORE_READONLY_FLAG 0x00008000
 175 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
 176
 177 #endif /* __MINGW32_VERSION */
 178
 179
 180 struct cryptoapi_rsa_data {
 181         const CERT_CONTEXT *cert;
 182         HCRYPTPROV crypt_prov;
 183         DWORD key_spec;
 184         BOOL free_crypt_prov;
 185 };
 186
 187
 188 static void cryptoapi_error(const char *msg)
 189 {
 190         wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
 191                    msg, (unsigned int) GetLastError());
 192 }
 193
 194
 195 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
 196                                  unsigned char *to, RSA *rsa, int padding)
 197 {
 198         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 199         return 0;
 200 }
 201
 202
 203 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
 204                                  unsigned char *to, RSA *rsa, int padding)
 205 {
 206         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 207         return 0;
 208 }
 209
 210
 211 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
 212                                   unsigned char *to, RSA *rsa, int padding)
 213 {
 214         struct cryptoapi_rsa_data *priv =
 215                 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
 216         HCRYPTHASH hash;
 217         DWORD hash_size, len, i;
 218         unsigned char *buf = NULL;
 219         int ret = 0;
 220
 221         if (priv == NULL) {
 222                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 223                        ERR_R_PASSED_NULL_PARAMETER);
 224                 return 0;
 225         }
 226
 227         if (padding != RSA_PKCS1_PADDING) {
 228                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 229                        RSA_R_UNKNOWN_PADDING_TYPE);
 230                 return 0;
 231         }
 232
 233         if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
 234                 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
 235                            __func__);
 236                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 237                        RSA_R_INVALID_MESSAGE_LENGTH);
 238                 return 0;
 239         }
 240
 241         if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
 242         {
 243                 cryptoapi_error("CryptCreateHash failed");
 244                 return 0;
 245         }
 246
 247         len = sizeof(hash_size);
 248         if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
 249                                0)) {
 250                 cryptoapi_error("CryptGetHashParam failed");
 251                 goto err;
 252         }
 253
 254         if ((int) hash_size != flen) {
 255                 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
 256                            (unsigned) hash_size, flen);
 257                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 258                        RSA_R_INVALID_MESSAGE_LENGTH);
 259                 goto err;
 260         }
 261         if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
 262                 cryptoapi_error("CryptSetHashParam failed");
 263                 goto err;
 264         }
 265
 266         len = RSA_size(rsa);
 267         buf = os_malloc(len);
 268         if (buf == NULL) {
 269                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
 270                 goto err;
 271         }
 272
 273         if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
 274                 cryptoapi_error("CryptSignHash failed");
 275                 goto err;
 276         }
 277
 278         for (i = 0; i < len; i++)
 279                 to[i] = buf[len - i - 1];
 280         ret = len;
 281
 282 err:
 283         os_free(buf);
 284         CryptDestroyHash(hash);
 285
 286         return ret;
 287 }
 288
 289
 290 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
 291                                   unsigned char *to, RSA *rsa, int padding)
 292 {
 293         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 294         return 0;
 295 }
 296
 297
 298 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
 299 {
 300         if (priv == NULL)
 301                 return;
 302         if (priv->crypt_prov && priv->free_crypt_prov)
 303                 CryptReleaseContext(priv->crypt_prov, 0);
 304         if (priv->cert)
 305                 CertFreeCertificateContext(priv->cert);
 306         os_free(priv);
 307 }
 308
 309
 310 static int cryptoapi_finish(RSA *rsa)
 311 {
 312         cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
 313         os_free((void *) rsa->meth);
 314         rsa->meth = NULL;
 315         return 1;
 316 }
 317
 318
 319 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
 320 {
 321         HCERTSTORE cs;
 322         const CERT_CONTEXT *ret = NULL;
 323
 324         cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
 325                            store | CERT_STORE_OPEN_EXISTING_FLAG |
 326                            CERT_STORE_READONLY_FLAG, L"MY");
 327         if (cs == NULL) {
 328                 cryptoapi_error("Failed to open 'My system store'");
 329                 return NULL;
 330         }
 331
 332         if (strncmp(name, "cert://", 7) == 0) {
 333                 unsigned short wbuf[255];
 334                 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
 335                 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
 336                                                  PKCS_7_ASN_ENCODING,
 337                                                  0, CERT_FIND_SUBJECT_STR,
 338                                                  wbuf, NULL);
 339         } else if (strncmp(name, "hash://", 7) == 0) {
 340                 CRYPT_HASH_BLOB blob;
 341                 int len;
 342                 const char *hash = name + 7;
 343                 unsigned char *buf;
 344
 345                 len = os_strlen(hash) / 2;
 346                 buf = os_malloc(len);
 347                 if (buf && hexstr2bin(hash, buf, len) == 0) {
 348                         blob.cbData = len;
 349                         blob.pbData = buf;
 350                         ret = CertFindCertificateInStore(cs,
 351                                                          X509_ASN_ENCODING |
 352                                                          PKCS_7_ASN_ENCODING,
 353                                                          0, CERT_FIND_HASH,
 354                                                          &blob, NULL);
 355                 }
 356                 os_free(buf);
 357         }
 358
 359         CertCloseStore(cs, 0);
 360
 361         return ret;
 362 }
 363
 364
 365 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
 366 {
 367         X509 *cert = NULL;
 368         RSA *rsa = NULL, *pub_rsa;
 369         struct cryptoapi_rsa_data *priv;
 370         RSA_METHOD *rsa_meth;
 371
 372         if (name == NULL ||
 373             (strncmp(name, "cert://", 7) != 0 &&
 374              strncmp(name, "hash://", 7) != 0))
 375                 return -1;
 376
 377         priv = os_zalloc(sizeof(*priv));
 378         rsa_meth = os_zalloc(sizeof(*rsa_meth));
 379         if (priv == NULL || rsa_meth == NULL) {
 380                 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
 381                            "for CryptoAPI RSA method");
 382                 os_free(priv);
 383                 os_free(rsa_meth);
 384                 return -1;
 385         }
 386
 387         priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
 388         if (priv->cert == NULL) {
 389                 priv->cert = cryptoapi_find_cert(
 390                         name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
 391         }
 392         if (priv->cert == NULL) {
 393                 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
 394                            "'%s'", name);
 395                 goto err;
 396         }
 397
 398         cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
 399                         priv->cert->cbCertEncoded);
 400         if (cert == NULL) {
 401                 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
 402                            "encoding");
 403                 goto err;
 404         }
 405
 406         if (!CryptAcquireCertificatePrivateKey(priv->cert,
 407                                                CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
 408                                                NULL, &priv->crypt_prov,
 409                                                &priv->key_spec,
 410                                                &priv->free_crypt_prov)) {
 411                 cryptoapi_error("Failed to acquire a private key for the "
 412                                 "certificate");
 413                 goto err;
 414         }
 415
 416         rsa_meth->name = "Microsoft CryptoAPI RSA Method";
 417         rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
 418         rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
 419         rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
 420         rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
 421         rsa_meth->finish = cryptoapi_finish;
 422         rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
 423         rsa_meth->app_data = (char *) priv;
 424
 425         rsa = RSA_new();
 426         if (rsa == NULL) {
 427                 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
 428                        ERR_R_MALLOC_FAILURE);
 429                 goto err;
 430         }
 431
 432         if (!SSL_use_certificate(ssl, cert)) {
 433                 RSA_free(rsa);
 434                 rsa = NULL;
 435                 goto err;
 436         }
 437         pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
 438         X509_free(cert);
 439         cert = NULL;
 440
 441         rsa->n = BN_dup(pub_rsa->n);
 442         rsa->e = BN_dup(pub_rsa->e);
 443         if (!RSA_set_method(rsa, rsa_meth))
 444                 goto err;
 445
 446         if (!SSL_use_RSAPrivateKey(ssl, rsa))
 447                 goto err;
 448         RSA_free(rsa);
 449
 450         return 0;
 451
 452 err:
 453         if (cert)
 454                 X509_free(cert);
 455         if (rsa)
 456                 RSA_free(rsa);
 457         else {
 458                 os_free(rsa_meth);
 459                 cryptoapi_free_data(priv);
 460         }
 461         return -1;
 462 }
 463
 464
 465 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
 466 {
 467         HCERTSTORE cs;
 468         PCCERT_CONTEXT ctx = NULL;
 469         X509 *cert;
 470         char buf[128];
 471         const char *store;
 472 #ifdef UNICODE
 473         WCHAR *wstore;
 474 #endif /* UNICODE */
 475
 476         if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
 477                 return -1;
 478
 479         store = name + 13;
 480 #ifdef UNICODE
 481         wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
 482         if (wstore == NULL)
 483                 return -1;
 484         wsprintf(wstore, L"%S", store);
 485         cs = CertOpenSystemStore(0, wstore);
 486         os_free(wstore);
 487 #else /* UNICODE */
 488         cs = CertOpenSystemStore(0, store);
 489 #endif /* UNICODE */
 490         if (cs == NULL) {
 491                 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
 492                            "'%s': error=%d", __func__, store,
 493                            (int) GetLastError());
 494                 return -1;
 495         }
 496
 497         while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
 498                 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
 499                                 ctx->cbCertEncoded);
 500                 if (cert == NULL) {
 501                         wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
 502                                    "X509 DER encoding for CA cert");
 503                         continue;
 504                 }
 505
 506                 X509_NAME_oneline(X509_get_subject_name(cert), buf,
 507                                   sizeof(buf));
 508                 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
 509                            "system certificate store: subject='%s'", buf);
 510
 511                 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
 512                         tls_show_errors(MSG_WARNING, __func__,
 513                                         "Failed to add ca_cert to OpenSSL "
 514                                         "certificate store");
 515                 }
 516
 517                 X509_free(cert);
 518         }
 519
 520         if (!CertCloseStore(cs, 0)) {
 521                 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
 522                            "'%s': error=%d", __func__, name + 13,
 523                            (int) GetLastError());
 524         }
 525
 526         return 0;
 527 }
 528
 529
 530 #else /* CONFIG_NATIVE_WINDOWS */
 531
 532 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
 533 {
 534         return -1;
 535 }
 536
 537 #endif /* CONFIG_NATIVE_WINDOWS */
 538
 539
 540 static void ssl_info_cb(const SSL *ssl, int where, int ret)
 541 {
 542         const char *str;
 543         int w;
 544
 545         wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
 546         w = where & ~SSL_ST_MASK;
 547         if (w & SSL_ST_CONNECT)
 548                 str = "SSL_connect";
 549         else if (w & SSL_ST_ACCEPT)
 550                 str = "SSL_accept";
 551         else
 552                 str = "undefined";
 553
 554         if (where & SSL_CB_LOOP) {
 555                 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
 556                            str, SSL_state_string_long(ssl));
 557         } else if (where & SSL_CB_ALERT) {
 558                 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
 559                 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
 560                            where & SSL_CB_READ ?
 561                            "read (remote end reported an error)" :
 562                            "write (local SSL3 detected an error)",
 563                            SSL_alert_type_string_long(ret),
 564                            SSL_alert_desc_string_long(ret));
 565                 if ((ret >> 8) == SSL3_AL_FATAL) {
 566                         if (where & SSL_CB_READ)
 567                                 conn->read_alerts++;
 568                         else
 569                                 conn->write_alerts++;
 570                 }
 571                 if (conn->context->event_cb != NULL) {
 572                         union tls_event_data ev;
 573                         struct tls_context *context = conn->context;
 574                         os_memset(&ev, 0, sizeof(ev));
 575                         ev.alert.is_local = !(where & SSL_CB_READ);
 576                         ev.alert.type = SSL_alert_type_string_long(ret);
 577                         ev.alert.description = SSL_alert_desc_string_long(ret);
 578                         context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
 579                 }
 580         } else if (where & SSL_CB_EXIT && ret <= 0) {
 581                 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
 582                            str, ret == 0 ? "failed" : "error",
 583                            SSL_state_string_long(ssl));
 584         }
 585 }
 586
 587
 588 #ifndef OPENSSL_NO_ENGINE
 589 /**
 590  * tls_engine_load_dynamic_generic - load any openssl engine
 591  * @pre: an array of commands and values that load an engine initialized
 592  *       in the engine specific function
 593  * @post: an array of commands and values that initialize an already loaded
 594  *        engine (or %NULL if not required)
 595  * @id: the engine id of the engine to load (only required if post is not %NULL
 596  *
 597  * This function is a generic function that loads any openssl engine.
 598  *
 599  * Returns: 0 on success, -1 on failure
 600  */
 601 static int tls_engine_load_dynamic_generic(const char *pre[],
 602                                            const char *post[], const char *id)
 603 {
 604         ENGINE *engine;
 605         const char *dynamic_id = "dynamic";
 606
 607         engine = ENGINE_by_id(id);
 608         if (engine) {
 609                 ENGINE_free(engine);
 610                 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
 611                            "available", id);
 612                 return 0;
 613         }
 614         ERR_clear_error();
 615
 616         engine = ENGINE_by_id(dynamic_id);
 617         if (engine == NULL) {
 618                 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
 619                            dynamic_id,
 620                            ERR_error_string(ERR_get_error(), NULL));
 621                 return -1;
 622         }
 623
 624         /* Perform the pre commands. This will load the engine. */
 625         while (pre && pre[0]) {
 626                 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
 627                 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
 628                         wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
 629                                    "%s %s [%s]", pre[0], pre[1],
 630                                    ERR_error_string(ERR_get_error(), NULL));
 631                         ENGINE_free(engine);
 632                         return -1;
 633                 }
 634                 pre += 2;
 635         }
 636
 637         /*
 638          * Free the reference to the "dynamic" engine. The loaded engine can
 639          * now be looked up using ENGINE_by_id().
 640          */
 641         ENGINE_free(engine);
 642
 643         engine = ENGINE_by_id(id);
 644         if (engine == NULL) {
 645                 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
 646                            id, ERR_error_string(ERR_get_error(), NULL));
 647                 return -1;
 648         }
 649
 650         while (post && post[0]) {
 651                 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
 652                 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
 653                         wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
 654                                 " %s %s [%s]", post[0], post[1],
 655                                    ERR_error_string(ERR_get_error(), NULL));
 656                         ENGINE_remove(engine);
 657                         ENGINE_free(engine);
 658                         return -1;
 659                 }
 660                 post += 2;
 661         }
 662         ENGINE_free(engine);
 663
 664         return 0;
 665 }
 666
 667
 668 /**
 669  * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
 670  * @pkcs11_so_path: pksc11_so_path from the configuration
 671  * @pcks11_module_path: pkcs11_module_path from the configuration
 672  */
 673 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
 674                                           const char *pkcs11_module_path)
 675 {
 676         char *engine_id = "pkcs11";
 677         const char *pre_cmd[] = {
 678                 "SO_PATH", NULL /* pkcs11_so_path */,
 679                 "ID", NULL /* engine_id */,
 680                 "LIST_ADD", "1",
 681                 /* "NO_VCHECK", "1", */
 682                 "LOAD", NULL,
 683                 NULL, NULL
 684         };
 685         const char *post_cmd[] = {
 686                 "MODULE_PATH", NULL /* pkcs11_module_path */,
 687                 NULL, NULL
 688         };
 689
 690         if (!pkcs11_so_path || !pkcs11_module_path)
 691                 return 0;
 692
 693         pre_cmd[1] = pkcs11_so_path;
 694         pre_cmd[3] = engine_id;
 695         post_cmd[1] = pkcs11_module_path;
 696
 697         wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
 698                    pkcs11_so_path);
 699
 700         return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
 701 }
 702
 703
 704 /**
 705  * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
 706  * @opensc_so_path: opensc_so_path from the configuration
 707  */
 708 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
 709 {
 710         char *engine_id = "opensc";
 711         const char *pre_cmd[] = {
 712                 "SO_PATH", NULL /* opensc_so_path */,
 713                 "ID", NULL /* engine_id */,
 714                 "LIST_ADD", "1",
 715                 "LOAD", NULL,
 716                 NULL, NULL
 717         };
 718
 719         if (!opensc_so_path)
 720                 return 0;
 721
 722         pre_cmd[1] = opensc_so_path;
 723         pre_cmd[3] = engine_id;
 724
 725         wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
 726                    opensc_so_path);
 727
 728         return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
 729 }
 730 #endif /* OPENSSL_NO_ENGINE */
 731
 732
 733 void * tls_init(const struct tls_config *conf)
 734 {
 735         SSL_CTX *ssl;
 736         struct tls_context *context;
 737
 738         if (tls_openssl_ref_count == 0) {
 739                 tls_global = context = tls_context_new(conf);
 740                 if (context == NULL)
 741                         return NULL;
 742 #ifdef CONFIG_FIPS
 743 #ifdef OPENSSL_FIPS
 744                 if (conf && conf->fips_mode) {
 745                         if (!FIPS_mode_set(1)) {
 746                                 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
 747                                            "mode");
 748                                 ERR_load_crypto_strings();
 749                                 ERR_print_errors_fp(stderr);
 750                                 os_free(tls_global);
 751                                 tls_global = NULL;
 752                                 return NULL;
 753                         } else
 754                                 wpa_printf(MSG_INFO, "Running in FIPS mode");
 755                 }
 756 #else /* OPENSSL_FIPS */
 757                 if (conf && conf->fips_mode) {
 758                         wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
 759                                    "supported");
 760                         os_free(tls_global);
 761                         tls_global = NULL;
 762                         return NULL;
 763                 }
 764 #endif /* OPENSSL_FIPS */
 765 #endif /* CONFIG_FIPS */
 766                 SSL_load_error_strings();
 767                 SSL_library_init();
 768 #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256)
 769                 EVP_add_digest(EVP_sha256());
 770 #endif /* OPENSSL_NO_SHA256 */
 771                 /* TODO: if /dev/urandom is available, PRNG is seeded
 772                  * automatically. If this is not the case, random data should
 773                  * be added here. */
 774
 775 #ifdef PKCS12_FUNCS
 776 #ifndef OPENSSL_NO_RC2
 777                 /*
 778                  * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
 779                  * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
 780                  * versions, but it looks like OpenSSL 1.0.0 does not do that
 781                  * anymore.
 782                  */
 783                 EVP_add_cipher(EVP_rc2_40_cbc());
 784 #endif /* OPENSSL_NO_RC2 */
 785                 PKCS12_PBE_add();
 786 #endif  /* PKCS12_FUNCS */
 787         } else {
 788 #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
 789                 /* Newer OpenSSL can store app-data per-SSL */
 790                 context = tls_context_new(conf);
 791                 if (context == NULL)
 792                         return NULL;
 793 #else /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 794                 context = tls_global;
 795 #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 796         }
 797         tls_openssl_ref_count++;
 798
 799         ssl = SSL_CTX_new(TLSv1_method());
 800         if (ssl == NULL) {
 801                 tls_openssl_ref_count--;
 802 #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
 803                 if (context != tls_global)
 804                         os_free(context);
 805 #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 806                 if (tls_openssl_ref_count == 0) {
 807                         os_free(tls_global);
 808                         tls_global = NULL;
 809                 }
 810                 return NULL;
 811         }
 812
 813         SSL_CTX_set_info_callback(ssl, ssl_info_cb);
 814 #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
 815         SSL_CTX_set_app_data(ssl, context);
 816 #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 817
 818 #ifndef OPENSSL_NO_ENGINE
 819         if (conf &&
 820             (conf->opensc_engine_path || conf->pkcs11_engine_path ||
 821              conf->pkcs11_module_path)) {
 822                 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
 823                 ERR_load_ENGINE_strings();
 824                 ENGINE_load_dynamic();
 825
 826                 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
 827                     tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
 828                                                    conf->pkcs11_module_path)) {
 829                         tls_deinit(ssl);
 830                         return NULL;
 831                 }
 832         }
 833 #endif /* OPENSSL_NO_ENGINE */
 834
 835         return ssl;
 836 }
 837
 838
 839 void tls_deinit(void *ssl_ctx)
 840 {
 841         SSL_CTX *ssl = ssl_ctx;
 842 #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
 843         struct tls_context *context = SSL_CTX_get_app_data(ssl);
 844         if (context != tls_global)
 845                 os_free(context);
 846 #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 847         SSL_CTX_free(ssl);
 848
 849         tls_openssl_ref_count--;
 850         if (tls_openssl_ref_count == 0) {
 851 #ifndef OPENSSL_NO_ENGINE
 852                 ENGINE_cleanup();
 853 #endif /* OPENSSL_NO_ENGINE */
 854                 CRYPTO_cleanup_all_ex_data();
 855                 ERR_remove_state(0);
 856                 ERR_free_strings();
 857                 EVP_cleanup();
 858                 os_free(tls_global->ocsp_stapling_response);
 859                 tls_global->ocsp_stapling_response = NULL;
 860                 os_free(tls_global);
 861                 tls_global = NULL;
 862         }
 863 }
 864
 865
 866 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
 867                            const char *pin, const char *key_id,
 868                            const char *cert_id, const char *ca_cert_id)
 869 {
 870 #ifndef OPENSSL_NO_ENGINE
 871         int ret = -1;
 872         if (engine_id == NULL) {
 873                 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
 874                 return -1;
 875         }
 876 #ifndef ANDROID
 877         if (pin == NULL) {
 878                 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
 879                 return -1;
 880         }
 881 #endif
 882         if (key_id == NULL) {
 883                 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
 884                 return -1;
 885         }
 886
 887         ERR_clear_error();
 888 #ifdef ANDROID
 889         ENGINE_load_dynamic();
 890 #endif
 891         conn->engine = ENGINE_by_id(engine_id);
 892         if (!conn->engine) {
 893                 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
 894                            engine_id, ERR_error_string(ERR_get_error(), NULL));
 895                 goto err;
 896         }
 897         if (ENGINE_init(conn->engine) != 1) {
 898                 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
 899                            "(engine: %s) [%s]", engine_id,
 900                            ERR_error_string(ERR_get_error(), NULL));
 901                 goto err;
 902         }
 903         wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
 904
 905 #ifndef ANDROID
 906         if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
 907                 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
 908                            ERR_error_string(ERR_get_error(), NULL));
 909                 goto err;
 910         }
 911 #endif
 912         /* load private key first in-case PIN is required for cert */
 913         conn->private_key = ENGINE_load_private_key(conn->engine,
 914                                                     key_id, NULL, NULL);
 915         if (!conn->private_key) {
 916                 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
 917                                 " '%s' [%s]", key_id,
 918                            ERR_error_string(ERR_get_error(), NULL));
 919                 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
 920                 goto err;
 921         }
 922
 923         /* handle a certificate and/or CA certificate */
 924         if (cert_id || ca_cert_id) {
 925                 const char *cmd_name = "LOAD_CERT_CTRL";
 926
 927                 /* test if the engine supports a LOAD_CERT_CTRL */
 928                 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
 929                                  0, (void *)cmd_name, NULL)) {
 930                         wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
 931                                    " loading certificates");
 932                         ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
 933                         goto err;
 934                 }
 935         }
 936
 937         return 0;
 938
 939 err:
 940         if (conn->engine) {
 941                 ENGINE_free(conn->engine);
 942                 conn->engine = NULL;
 943         }
 944
 945         if (conn->private_key) {
 946                 EVP_PKEY_free(conn->private_key);
 947                 conn->private_key = NULL;
 948         }
 949
 950         return ret;
 951 #else /* OPENSSL_NO_ENGINE */
 952         return 0;
 953 #endif /* OPENSSL_NO_ENGINE */
 954 }
 955
 956
 957 static void tls_engine_deinit(struct tls_connection *conn)
 958 {
 959 #ifndef OPENSSL_NO_ENGINE
 960         wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
 961         if (conn->private_key) {
 962                 EVP_PKEY_free(conn->private_key);
 963                 conn->private_key = NULL;
 964         }
 965         if (conn->engine) {
 966                 ENGINE_finish(conn->engine);
 967                 conn->engine = NULL;
 968         }
 969 #endif /* OPENSSL_NO_ENGINE */
 970 }
 971
 972
 973 int tls_get_errors(void *ssl_ctx)
 974 {
 975         int count = 0;
 976         unsigned long err;
 977
 978         while ((err = ERR_get_error())) {
 979                 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
 980                            ERR_error_string(err, NULL));
 981                 count++;
 982         }
 983
 984         return count;
 985 }
 986
 987 struct tls_connection * tls_connection_init(void *ssl_ctx)
 988 {
 989         SSL_CTX *ssl = ssl_ctx;
 990         struct tls_connection *conn;
 991         long options;
 992 #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
 993         struct tls_context *context = SSL_CTX_get_app_data(ssl);
 994 #else /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 995         struct tls_context *context = tls_global;
 996 #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
 997
 998         conn = os_zalloc(sizeof(*conn));
 999         if (conn == NULL)
1000                 return NULL;
1001         conn->ssl = SSL_new(ssl);
1002         if (conn->ssl == NULL) {
1003                 tls_show_errors(MSG_INFO, __func__,
1004                                 "Failed to initialize new SSL connection");
1005                 os_free(conn);
1006                 return NULL;
1007         }
1008
1009         conn->context = context;
1010         SSL_set_app_data(conn->ssl, conn);
1011         options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
1012                 SSL_OP_SINGLE_DH_USE;
1013 #ifdef SSL_OP_NO_COMPRESSION
1014         options |= SSL_OP_NO_COMPRESSION;
1015 #endif /* SSL_OP_NO_COMPRESSION */
1016         SSL_set_options(conn->ssl, options);
1017
1018         conn->ssl_in = BIO_new(BIO_s_mem());
1019         if (!conn->ssl_in) {
1020                 tls_show_errors(MSG_INFO, __func__,
1021                                 "Failed to create a new BIO for ssl_in");
1022                 SSL_free(conn->ssl);
1023                 os_free(conn);
1024                 return NULL;
1025         }
1026
1027         conn->ssl_out = BIO_new(BIO_s_mem());
1028         if (!conn->ssl_out) {
1029                 tls_show_errors(MSG_INFO, __func__,
1030                                 "Failed to create a new BIO for ssl_out");
1031                 SSL_free(conn->ssl);
1032                 BIO_free(conn->ssl_in);
1033                 os_free(conn);
1034                 return NULL;
1035         }
1036
1037         SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1038
1039         return conn;
1040 }
1041
1042
1043 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1044 {
1045         if (conn == NULL)
1046                 return;
1047         SSL_free(conn->ssl);
1048         tls_engine_deinit(conn);
1049         os_free(conn->subject_match);
1050         os_free(conn->altsubject_match);
1051         os_free(conn->suffix_match);
1052         os_free(conn->session_ticket);
1053         os_free(conn);
1054 }
1055
1056
1057 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1058 {
1059         return conn ? SSL_is_init_finished(conn->ssl) : 0;
1060 }
1061
1062
1063 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1064 {
1065         if (conn == NULL)
1066                 return -1;
1067
1068         /* Shutdown previous TLS connection without notifying the peer
1069          * because the connection was already terminated in practice
1070          * and "close notify" shutdown alert would confuse AS. */
1071         SSL_set_quiet_shutdown(conn->ssl, 1);
1072         SSL_shutdown(conn->ssl);
1073         return 0;
1074 }
1075
1076
1077 static int tls_match_altsubject_component(X509 *cert, int type,
1078                                           const char *value, size_t len)
1079 {
1080         GENERAL_NAME *gen;
1081         void *ext;
1082         int i, found = 0;
1083
1084         ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1085
1086         for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1087                 gen = sk_GENERAL_NAME_value(ext, i);
1088                 if (gen->type != type)
1089                         continue;
1090                 if (os_strlen((char *) gen->d.ia5->data) == len &&
1091                     os_memcmp(value, gen->d.ia5->data, len) == 0)
1092                         found++;
1093         }
1094
1095         return found;
1096 }
1097
1098
1099 static int tls_match_altsubject(X509 *cert, const char *match)
1100 {
1101         int type;
1102         const char *pos, *end;
1103         size_t len;
1104
1105         pos = match;
1106         do {
1107                 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1108                         type = GEN_EMAIL;
1109                         pos += 6;
1110                 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1111                         type = GEN_DNS;
1112                         pos += 4;
1113                 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1114                         type = GEN_URI;
1115                         pos += 4;
1116                 } else {
1117                         wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1118                                    "match '%s'", pos);
1119                         return 0;
1120                 }
1121                 end = os_strchr(pos, ';');
1122                 while (end) {
1123                         if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1124                             os_strncmp(end + 1, "DNS:", 4) == 0 ||
1125                             os_strncmp(end + 1, "URI:", 4) == 0)
1126                                 break;
1127                         end = os_strchr(end + 1, ';');
1128                 }
1129                 if (end)
1130                         len = end - pos;
1131                 else
1132                         len = os_strlen(pos);
1133                 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1134                         return 1;
1135                 pos = end + 1;
1136         } while (end);
1137
1138         return 0;
1139 }
1140
1141
1142 #ifndef CONFIG_NATIVE_WINDOWS
1143 static int domain_suffix_match(const u8 *val, size_t len, const char *match)
1144 {
1145         size_t i, match_len;
1146
1147         /* Check for embedded nuls that could mess up suffix matching */
1148         for (i = 0; i < len; i++) {
1149                 if (val[i] == '\0') {
1150                         wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1151                         return 0;
1152                 }
1153         }
1154
1155         match_len = os_strlen(match);
1156         if (match_len > len)
1157                 return 0;
1158
1159         if (os_strncasecmp((const char *) val + len - match_len, match,
1160                            match_len) != 0)
1161                 return 0; /* no match */
1162
1163         if (match_len == len)
1164                 return 1; /* exact match */
1165
1166         if (val[len - match_len - 1] == '.')
1167                 return 1; /* full label match completes suffix match */
1168
1169         wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1170         return 0;
1171 }
1172 #endif /* CONFIG_NATIVE_WINDOWS */
1173
1174
1175 static int tls_match_suffix(X509 *cert, const char *match)
1176 {
1177 #ifdef CONFIG_NATIVE_WINDOWS
1178         /* wincrypt.h has conflicting X509_NAME definition */
1179         return -1;
1180 #else /* CONFIG_NATIVE_WINDOWS */
1181         GENERAL_NAME *gen;
1182         void *ext;
1183         int i;
1184         int dns_name = 0;
1185         X509_NAME *name;
1186
1187         wpa_printf(MSG_DEBUG, "TLS: Match domain against suffix %s", match);
1188
1189         ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1190
1191         for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1192                 gen = sk_GENERAL_NAME_value(ext, i);
1193                 if (gen->type != GEN_DNS)
1194                         continue;
1195                 dns_name++;
1196                 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
1197                                   gen->d.dNSName->data,
1198                                   gen->d.dNSName->length);
1199                 if (domain_suffix_match(gen->d.dNSName->data,
1200                                         gen->d.dNSName->length, match) == 1) {
1201                         wpa_printf(MSG_DEBUG, "TLS: Suffix match in dNSName found");
1202                         return 1;
1203                 }
1204         }
1205
1206         if (dns_name) {
1207                 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
1208                 return 0;
1209         }
1210
1211         name = X509_get_subject_name(cert);
1212         i = -1;
1213         for (;;) {
1214                 X509_NAME_ENTRY *e;
1215                 ASN1_STRING *cn;
1216
1217                 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
1218                 if (i == -1)
1219                         break;
1220                 e = X509_NAME_get_entry(name, i);
1221                 if (e == NULL)
1222                         continue;
1223                 cn = X509_NAME_ENTRY_get_data(e);
1224                 if (cn == NULL)
1225                         continue;
1226                 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
1227                                   cn->data, cn->length);
1228                 if (domain_suffix_match(cn->data, cn->length, match) == 1) {
1229                         wpa_printf(MSG_DEBUG, "TLS: Suffix match in commonName found");
1230                         return 1;
1231                 }
1232         }
1233
1234         wpa_printf(MSG_DEBUG, "TLS: No CommonName suffix match found");
1235         return 0;
1236 #endif /* CONFIG_NATIVE_WINDOWS */
1237 }
1238
1239
1240 static enum tls_fail_reason openssl_tls_fail_reason(int err)
1241 {
1242         switch (err) {
1243         case X509_V_ERR_CERT_REVOKED:
1244                 return TLS_FAIL_REVOKED;
1245         case X509_V_ERR_CERT_NOT_YET_VALID:
1246         case X509_V_ERR_CRL_NOT_YET_VALID:
1247                 return TLS_FAIL_NOT_YET_VALID;
1248         case X509_V_ERR_CERT_HAS_EXPIRED:
1249         case X509_V_ERR_CRL_HAS_EXPIRED:
1250                 return TLS_FAIL_EXPIRED;
1251         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1252         case X509_V_ERR_UNABLE_TO_GET_CRL:
1253         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1254         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1255         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1256         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1257         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1258         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1259         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1260         case X509_V_ERR_INVALID_CA:
1261                 return TLS_FAIL_UNTRUSTED;
1262         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1263         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1264         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1265         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1266         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1267         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1268         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1269         case X509_V_ERR_CERT_UNTRUSTED:
1270         case X509_V_ERR_CERT_REJECTED:
1271                 return TLS_FAIL_BAD_CERTIFICATE;
1272         default:
1273                 return TLS_FAIL_UNSPECIFIED;
1274         }
1275 }
1276
1277
1278 static struct wpabuf * get_x509_cert(X509 *cert)
1279 {
1280         struct wpabuf *buf;
1281         u8 *tmp;
1282
1283         int cert_len = i2d_X509(cert, NULL);
1284         if (cert_len <= 0)
1285                 return NULL;
1286
1287         buf = wpabuf_alloc(cert_len);
1288         if (buf == NULL)
1289                 return NULL;
1290
1291         tmp = wpabuf_put(buf, cert_len);
1292         i2d_X509(cert, &tmp);
1293         return buf;
1294 }
1295
1296
1297 static void openssl_tls_fail_event(struct tls_connection *conn,
1298                                    X509 *err_cert, int err, int depth,
1299                                    const char *subject, const char *err_str,
1300                                    enum tls_fail_reason reason)
1301 {
1302         union tls_event_data ev;
1303         struct wpabuf *cert = NULL;
1304         struct tls_context *context = conn->context;
1305
1306         if (context->event_cb == NULL)
1307                 return;
1308
1309         cert = get_x509_cert(err_cert);
1310         os_memset(&ev, 0, sizeof(ev));
1311         ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1312                 reason : openssl_tls_fail_reason(err);
1313         ev.cert_fail.depth = depth;
1314         ev.cert_fail.subject = subject;
1315         ev.cert_fail.reason_txt = err_str;
1316         ev.cert_fail.cert = cert;
1317         context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
1318         wpabuf_free(cert);
1319 }
1320
1321
1322 static void openssl_tls_cert_event(struct tls_connection *conn,
1323                                    X509 *err_cert, int depth,
1324                                    const char *subject)
1325 {
1326         struct wpabuf *cert = NULL;
1327         union tls_event_data ev;
1328         struct tls_context *context = conn->context;
1329 #ifdef CONFIG_SHA256
1330         u8 hash[32];
1331 #endif /* CONFIG_SHA256 */
1332
1333         if (context->event_cb == NULL)
1334                 return;
1335
1336         os_memset(&ev, 0, sizeof(ev));
1337         if (conn->cert_probe || context->cert_in_cb) {
1338                 cert = get_x509_cert(err_cert);
1339                 ev.peer_cert.cert = cert;
1340         }
1341 #ifdef CONFIG_SHA256
1342         if (cert) {
1343                 const u8 *addr[1];
1344                 size_t len[1];
1345                 addr[0] = wpabuf_head(cert);
1346                 len[0] = wpabuf_len(cert);
1347                 if (sha256_vector(1, addr, len, hash) == 0) {
1348                         ev.peer_cert.hash = hash;
1349                         ev.peer_cert.hash_len = sizeof(hash);
1350                 }
1351         }
1352 #endif /* CONFIG_SHA256 */
1353         ev.peer_cert.depth = depth;
1354         ev.peer_cert.subject = subject;
1355         context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
1356         wpabuf_free(cert);
1357 }
1358
1359
1360 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1361 {
1362         char buf[256];
1363         X509 *err_cert;
1364         int err, depth;
1365         SSL *ssl;
1366         struct tls_connection *conn;
1367         struct tls_context *context;
1368         char *match, *altmatch, *suffix_match;
1369         const char *err_str;
1370
1371         err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1372         if (!err_cert)
1373                 return 0;
1374
1375         err = X509_STORE_CTX_get_error(x509_ctx);
1376         depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1377         ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1378                                          SSL_get_ex_data_X509_STORE_CTX_idx());
1379         X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1380
1381         conn = SSL_get_app_data(ssl);
1382         if (conn == NULL)
1383                 return 0;
1384
1385         if (depth == 0)
1386                 conn->peer_cert = err_cert;
1387         else if (depth == 1)
1388                 conn->peer_issuer = err_cert;
1389         else if (depth == 2)
1390                 conn->peer_issuer_issuer = err_cert;
1391
1392         context = conn->context;
1393         match = conn->subject_match;
1394         altmatch = conn->altsubject_match;
1395         suffix_match = conn->suffix_match;
1396
1397         if (!preverify_ok && !conn->ca_cert_verify)
1398                 preverify_ok = 1;
1399         if (!preverify_ok && depth > 0 && conn->server_cert_only)
1400                 preverify_ok = 1;
1401         if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1402             (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1403              err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1404                 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1405                            "time mismatch");
1406                 preverify_ok = 1;
1407         }
1408
1409         err_str = X509_verify_cert_error_string(err);
1410
1411 #ifdef CONFIG_SHA256
1412         if (preverify_ok && depth == 0 && conn->server_cert_only) {
1413                 struct wpabuf *cert;
1414                 cert = get_x509_cert(err_cert);
1415                 if (!cert) {
1416                         wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1417                                    "server certificate data");
1418                         preverify_ok = 0;
1419                 } else {
1420                         u8 hash[32];
1421                         const u8 *addr[1];
1422                         size_t len[1];
1423                         addr[0] = wpabuf_head(cert);
1424                         len[0] = wpabuf_len(cert);
1425                         if (sha256_vector(1, addr, len, hash) < 0 ||
1426                             os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1427                                 err_str = "Server certificate mismatch";
1428                                 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1429                                 preverify_ok = 0;
1430                         }
1431                         wpabuf_free(cert);
1432                 }
1433         }
1434 #endif /* CONFIG_SHA256 */
1435
1436         if (!preverify_ok) {
1437                 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1438                            " error %d (%s) depth %d for '%s'", err, err_str,
1439                            depth, buf);
1440                 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1441                                        err_str, TLS_FAIL_UNSPECIFIED);
1442                 return preverify_ok;
1443         }
1444
1445         wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1446                    "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1447                    preverify_ok, err, err_str,
1448                    conn->ca_cert_verify, depth, buf);
1449         if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1450                 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1451                            "match with '%s'", buf, match);
1452                 preverify_ok = 0;
1453                 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1454                                        "Subject mismatch",
1455                                        TLS_FAIL_SUBJECT_MISMATCH);
1456         } else if (depth == 0 && altmatch &&
1457                    !tls_match_altsubject(err_cert, altmatch)) {
1458                 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1459                            "'%s' not found", altmatch);
1460                 preverify_ok = 0;
1461                 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1462                                        "AltSubject mismatch",
1463                                        TLS_FAIL_ALTSUBJECT_MISMATCH);
1464         } else if (depth == 0 && suffix_match &&
1465                    !tls_match_suffix(err_cert, suffix_match)) {
1466                 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
1467                            suffix_match);
1468                 preverify_ok = 0;
1469                 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1470                                        "Domain suffix mismatch",
1471                                        TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
1472         } else
1473                 openssl_tls_cert_event(conn, err_cert, depth, buf);
1474
1475         if (conn->cert_probe && preverify_ok && depth == 0) {
1476                 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1477                            "on probe-only run");
1478                 preverify_ok = 0;
1479                 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1480                                        "Server certificate chain probe",
1481                                        TLS_FAIL_SERVER_CHAIN_PROBE);
1482         }
1483
1484         if (preverify_ok && context->event_cb != NULL)
1485                 context->event_cb(context->cb_ctx,
1486                                   TLS_CERT_CHAIN_SUCCESS, NULL);
1487
1488         return preverify_ok;
1489 }
1490
1491
1492 #ifndef OPENSSL_NO_STDIO
1493 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1494 {
1495         SSL_CTX *ssl_ctx = _ssl_ctx;
1496         X509_LOOKUP *lookup;
1497         int ret = 0;
1498
1499         lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1500                                        X509_LOOKUP_file());
1501         if (lookup == NULL) {
1502                 tls_show_errors(MSG_WARNING, __func__,
1503                                 "Failed add lookup for X509 store");
1504                 return -1;
1505         }
1506
1507         if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1508                 unsigned long err = ERR_peek_error();
1509                 tls_show_errors(MSG_WARNING, __func__,
1510                                 "Failed load CA in DER format");
1511                 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1512                     ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1513                         wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1514                                    "cert already in hash table error",
1515                                    __func__);
1516                 } else
1517                         ret = -1;
1518         }
1519
1520         return ret;
1521 }
1522 #endif /* OPENSSL_NO_STDIO */
1523
1524
1525 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1526                                   const char *ca_cert, const u8 *ca_cert_blob,
1527                                   size_t ca_cert_blob_len, const char *ca_path)
1528 {
1529         SSL_CTX *ssl_ctx = _ssl_ctx;
1530
1531         /*
1532          * Remove previously configured trusted CA certificates before adding
1533          * new ones.
1534          */
1535         X509_STORE_free(ssl_ctx->cert_store);
1536         ssl_ctx->cert_store = X509_STORE_new();
1537         if (ssl_ctx->cert_store == NULL) {
1538                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1539                            "certificate store", __func__);
1540                 return -1;
1541         }
1542
1543         SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1544         conn->ca_cert_verify = 1;
1545
1546         if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1547                 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1548                            "chain");
1549                 conn->cert_probe = 1;
1550                 conn->ca_cert_verify = 0;
1551                 return 0;
1552         }
1553
1554         if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1555 #ifdef CONFIG_SHA256
1556                 const char *pos = ca_cert + 7;
1557                 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
1558                         wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
1559                                    "hash value '%s'", ca_cert);
1560                         return -1;
1561                 }
1562                 pos += 14;
1563                 if (os_strlen(pos) != 32 * 2) {
1564                         wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
1565                                    "hash length in ca_cert '%s'", ca_cert);
1566                         return -1;
1567                 }
1568                 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
1569                         wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
1570                                    "value in ca_cert '%s'", ca_cert);
1571                         return -1;
1572                 }
1573                 conn->server_cert_only = 1;
1574                 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
1575                            "certificate match");
1576                 return 0;
1577 #else /* CONFIG_SHA256 */
1578                 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
1579                            "cannot validate server certificate hash");
1580                 return -1;
1581 #endif /* CONFIG_SHA256 */
1582         }
1583
1584         if (ca_cert_blob) {
1585                 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1586                                       ca_cert_blob_len);
1587                 if (cert == NULL) {
1588                         tls_show_errors(MSG_WARNING, __func__,
1589                                         "Failed to parse ca_cert_blob");
1590                         return -1;
1591                 }
1592
1593                 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1594                         unsigned long err = ERR_peek_error();
1595                         tls_show_errors(MSG_WARNING, __func__,
1596                                         "Failed to add ca_cert_blob to "
1597                                         "certificate store");
1598                         if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1599                             ERR_GET_REASON(err) ==
1600                             X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1601                                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1602                                            "cert already in hash table error",
1603                                            __func__);
1604                         } else {
1605                                 X509_free(cert);
1606                                 return -1;
1607                         }
1608                 }
1609                 X509_free(cert);
1610                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1611                            "to certificate store", __func__);
1612                 return 0;
1613         }
1614
1615 #ifdef ANDROID
1616         if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
1617                 BIO *bio = BIO_from_keystore(&ca_cert[11]);
1618                 STACK_OF(X509_INFO) *stack = NULL;
1619                 int i;
1620
1621                 if (bio) {
1622                         stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
1623                         BIO_free(bio);
1624                 }
1625                 if (!stack)
1626                         return -1;
1627
1628                 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
1629                         X509_INFO *info = sk_X509_INFO_value(stack, i);
1630                         if (info->x509) {
1631                                 X509_STORE_add_cert(ssl_ctx->cert_store,
1632                                                     info->x509);
1633                         }
1634                         if (info->crl) {
1635                                 X509_STORE_add_crl(ssl_ctx->cert_store,
1636                                                    info->crl);
1637                         }
1638                 }
1639                 sk_X509_INFO_pop_free(stack, X509_INFO_free);
1640                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1641                 return 0;
1642         }
1643 #endif /* ANDROID */
1644
1645 #ifdef CONFIG_NATIVE_WINDOWS
1646         if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1647             0) {
1648                 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1649                            "system certificate store");
1650                 return 0;
1651         }
1652 #endif /* CONFIG_NATIVE_WINDOWS */
1653
1654         if (ca_cert || ca_path) {
1655 #ifndef OPENSSL_NO_STDIO
1656                 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1657                     1) {
1658                         tls_show_errors(MSG_WARNING, __func__,
1659                                         "Failed to load root certificates");
1660                         if (ca_cert &&
1661                             tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1662                                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1663                                            "DER format CA certificate",
1664                                            __func__);
1665                         } else
1666                                 return -1;
1667                 } else {
1668                         wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1669                                    "certificate(s) loaded");
1670                         tls_get_errors(ssl_ctx);
1671                 }
1672 #else /* OPENSSL_NO_STDIO */
1673                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1674                            __func__);
1675                 return -1;
1676 #endif /* OPENSSL_NO_STDIO */
1677         } else {
1678                 /* No ca_cert configured - do not try to verify server
1679                  * certificate */
1680                 conn->ca_cert_verify = 0;
1681         }
1682
1683         return 0;
1684 }
1685
1686
1687 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1688 {
1689         if (ca_cert) {
1690                 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1691                 {
1692                         tls_show_errors(MSG_WARNING, __func__,
1693                                         "Failed to load root certificates");
1694                         return -1;
1695                 }
1696
1697                 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1698                            "certificate(s) loaded");
1699
1700 #ifndef OPENSSL_NO_STDIO
1701                 /* Add the same CAs to the client certificate requests */
1702                 SSL_CTX_set_client_CA_list(ssl_ctx,
1703                                            SSL_load_client_CA_file(ca_cert));
1704 #endif /* OPENSSL_NO_STDIO */
1705         }
1706
1707         return 0;
1708 }
1709
1710
1711 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1712 {
1713         int flags;
1714
1715         if (check_crl) {
1716                 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1717                 if (cs == NULL) {
1718                         tls_show_errors(MSG_INFO, __func__, "Failed to get "
1719                                         "certificate store when enabling "
1720                                         "check_crl");
1721                         return -1;
1722                 }
1723                 flags = X509_V_FLAG_CRL_CHECK;
1724                 if (check_crl == 2)
1725                         flags |= X509_V_FLAG_CRL_CHECK_ALL;
1726                 X509_STORE_set_flags(cs, flags);
1727         }
1728         return 0;
1729 }
1730
1731
1732 static int tls_connection_set_subject_match(struct tls_connection *conn,
1733                                             const char *subject_match,
1734                                             const char *altsubject_match,
1735                                             const char *suffix_match)
1736 {
1737         os_free(conn->subject_match);
1738         conn->subject_match = NULL;
1739         if (subject_match) {
1740                 conn->subject_match = os_strdup(subject_match);
1741                 if (conn->subject_match == NULL)
1742                         return -1;
1743         }
1744
1745         os_free(conn->altsubject_match);
1746         conn->altsubject_match = NULL;
1747         if (altsubject_match) {
1748                 conn->altsubject_match = os_strdup(altsubject_match);
1749                 if (conn->altsubject_match == NULL)
1750                         return -1;
1751         }
1752
1753         os_free(conn->suffix_match);
1754         conn->suffix_match = NULL;
1755         if (suffix_match) {
1756                 conn->suffix_match = os_strdup(suffix_match);
1757                 if (conn->suffix_match == NULL)
1758                         return -1;
1759         }
1760
1761         return 0;
1762 }
1763
1764
1765 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1766                               int verify_peer)
1767 {
1768         static int counter = 0;
1769
1770         if (conn == NULL)
1771                 return -1;
1772
1773         if (verify_peer) {
1774                 conn->ca_cert_verify = 1;
1775                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1776                                SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1777                                SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1778         } else {
1779                 conn->ca_cert_verify = 0;
1780                 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1781         }
1782
1783         SSL_set_accept_state(conn->ssl);
1784
1785         /*
1786          * Set session id context in order to avoid fatal errors when client
1787          * tries to resume a session. However, set the context to a unique
1788          * value in order to effectively disable session resumption for now
1789          * since not all areas of the server code are ready for it (e.g.,
1790          * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1791          * handshake).
1792          */
1793         counter++;
1794         SSL_set_session_id_context(conn->ssl,
1795                                    (const unsigned char *) &counter,
1796                                    sizeof(counter));
1797
1798         return 0;
1799 }
1800
1801
1802 static int tls_connection_client_cert(struct tls_connection *conn,
1803                                       const char *client_cert,
1804                                       const u8 *client_cert_blob,
1805                                       size_t client_cert_blob_len)
1806 {
1807         if (client_cert == NULL && client_cert_blob == NULL)
1808                 return 0;
1809
1810         if (client_cert_blob &&
1811             SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1812                                      client_cert_blob_len) == 1) {
1813                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1814                            "OK");
1815                 return 0;
1816         } else if (client_cert_blob) {
1817                 tls_show_errors(MSG_DEBUG, __func__,
1818                                 "SSL_use_certificate_ASN1 failed");
1819         }
1820
1821         if (client_cert == NULL)
1822                 return -1;
1823
1824 #ifdef ANDROID
1825         if (os_strncmp("keystore://", client_cert, 11) == 0) {
1826                 BIO *bio = BIO_from_keystore(&client_cert[11]);
1827                 X509 *x509 = NULL;
1828                 int ret = -1;
1829                 if (bio) {
1830                         x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
1831                         BIO_free(bio);
1832                 }
1833                 if (x509) {
1834                         if (SSL_use_certificate(conn->ssl, x509) == 1)
1835                                 ret = 0;
1836                         X509_free(x509);
1837                 }
1838                 return ret;
1839         }
1840 #endif /* ANDROID */
1841
1842 #ifndef OPENSSL_NO_STDIO
1843         if (SSL_use_certificate_file(conn->ssl, client_cert,
1844                                      SSL_FILETYPE_ASN1) == 1) {
1845                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1846                            " --> OK");
1847                 return 0;
1848         }
1849
1850         if (SSL_use_certificate_file(conn->ssl, client_cert,
1851                                      SSL_FILETYPE_PEM) == 1) {
1852                 ERR_clear_error();
1853                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1854                            " --> OK");
1855                 return 0;
1856         }
1857
1858         tls_show_errors(MSG_DEBUG, __func__,
1859                         "SSL_use_certificate_file failed");
1860 #else /* OPENSSL_NO_STDIO */
1861         wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1862 #endif /* OPENSSL_NO_STDIO */
1863
1864         return -1;
1865 }
1866
1867
1868 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1869 {
1870 #ifndef OPENSSL_NO_STDIO
1871         if (client_cert == NULL)
1872                 return 0;
1873
1874         if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1875                                          SSL_FILETYPE_ASN1) != 1 &&
1876             SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
1877             SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1878                                          SSL_FILETYPE_PEM) != 1) {
1879                 tls_show_errors(MSG_INFO, __func__,
1880                                 "Failed to load client certificate");
1881                 return -1;
1882         }
1883         return 0;
1884 #else /* OPENSSL_NO_STDIO */
1885         if (client_cert == NULL)
1886                 return 0;
1887         wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1888         return -1;
1889 #endif /* OPENSSL_NO_STDIO */
1890 }
1891
1892
1893 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1894 {
1895         if (password == NULL) {
1896                 return 0;
1897         }
1898         os_strlcpy(buf, (char *) password, size);
1899         return os_strlen(buf);
1900 }
1901
1902
1903 #ifdef PKCS12_FUNCS
1904 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1905                             const char *passwd)
1906 {
1907         EVP_PKEY *pkey;
1908         X509 *cert;
1909         STACK_OF(X509) *certs;
1910         int res = 0;
1911         char buf[256];
1912
1913         pkey = NULL;
1914         cert = NULL;
1915         certs = NULL;
1916         if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1917                 tls_show_errors(MSG_DEBUG, __func__,
1918                                 "Failed to parse PKCS12 file");
1919                 PKCS12_free(p12);
1920                 return -1;
1921         }
1922         wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1923
1924         if (cert) {
1925                 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1926                                   sizeof(buf));
1927                 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1928                            "subject='%s'", buf);
1929                 if (ssl) {
1930                         if (SSL_use_certificate(ssl, cert) != 1)
1931                                 res = -1;
1932                 } else {
1933                         if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1934                                 res = -1;
1935                 }
1936                 X509_free(cert);
1937         }
1938
1939         if (pkey) {
1940                 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1941                 if (ssl) {
1942                         if (SSL_use_PrivateKey(ssl, pkey) != 1)
1943                                 res = -1;
1944                 } else {
1945                         if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1946                                 res = -1;
1947                 }
1948                 EVP_PKEY_free(pkey);
1949         }
1950
1951         if (certs) {
1952                 while ((cert = sk_X509_pop(certs)) != NULL) {
1953                         X509_NAME_oneline(X509_get_subject_name(cert), buf,
1954                                           sizeof(buf));
1955                         wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1956                                    " from PKCS12: subject='%s'", buf);
1957                         /*
1958                          * There is no SSL equivalent for the chain cert - so
1959                          * always add it to the context...
1960                          */
1961                         if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1962                                 res = -1;
1963                                 break;
1964                         }
1965                 }
1966                 sk_X509_free(certs);
1967         }
1968
1969         PKCS12_free(p12);
1970
1971         if (res < 0)
1972                 tls_get_errors(ssl_ctx);
1973
1974         return res;
1975 }
1976 #endif  /* PKCS12_FUNCS */
1977
1978
1979 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1980                            const char *passwd)
1981 {
1982 #ifdef PKCS12_FUNCS
1983         FILE *f;
1984         PKCS12 *p12;
1985
1986         f = fopen(private_key, "rb");
1987         if (f == NULL)
1988                 return -1;
1989
1990         p12 = d2i_PKCS12_fp(f, NULL);
1991         fclose(f);
1992
1993         if (p12 == NULL) {
1994                 tls_show_errors(MSG_INFO, __func__,
1995                                 "Failed to use PKCS#12 file");
1996                 return -1;
1997         }
1998
1999         return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
2000
2001 #else /* PKCS12_FUNCS */
2002         wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
2003                    "p12/pfx files");
2004         return -1;
2005 #endif  /* PKCS12_FUNCS */
2006 }
2007
2008
2009 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
2010                                 const u8 *blob, size_t len, const char *passwd)
2011 {
2012 #ifdef PKCS12_FUNCS
2013         PKCS12 *p12;
2014
2015         p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
2016         if (p12 == NULL) {
2017                 tls_show_errors(MSG_INFO, __func__,
2018                                 "Failed to use PKCS#12 blob");
2019                 return -1;
2020         }
2021
2022         return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
2023
2024 #else /* PKCS12_FUNCS */
2025         wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
2026                    "p12/pfx blobs");
2027         return -1;
2028 #endif  /* PKCS12_FUNCS */
2029 }
2030
2031
2032 #ifndef OPENSSL_NO_ENGINE
2033 static int tls_engine_get_cert(struct tls_connection *conn,
2034                                const char *cert_id,
2035                                X509 **cert)
2036 {
2037         /* this runs after the private key is loaded so no PIN is required */
2038         struct {
2039                 const char *cert_id;
2040                 X509 *cert;
2041         } params;
2042         params.cert_id = cert_id;
2043         params.cert = NULL;
2044
2045         if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
2046                              0, &params, NULL, 1)) {
2047                 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
2048                            " '%s' [%s]", cert_id,
2049                            ERR_error_string(ERR_get_error(), NULL));
2050                 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2051         }
2052         if (!params.cert) {
2053                 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
2054                            " '%s'", cert_id);
2055                 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2056         }
2057         *cert = params.cert;
2058         return 0;
2059 }
2060 #endif /* OPENSSL_NO_ENGINE */
2061
2062
2063 static int tls_connection_engine_client_cert(struct tls_connection *conn,
2064                                              const char *cert_id)
2065 {
2066 #ifndef OPENSSL_NO_ENGINE
2067         X509 *cert;
2068
2069         if (tls_engine_get_cert(conn, cert_id, &cert))
2070                 return -1;
2071
2072         if (!SSL_use_certificate(conn->ssl, cert)) {
2073                 tls_show_errors(MSG_ERROR, __func__,
2074                                 "SSL_use_certificate failed");
2075                 X509_free(cert);
2076                 return -1;
2077         }
2078         X509_free(cert);
2079         wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
2080                    "OK");
2081         return 0;
2082
2083 #else /* OPENSSL_NO_ENGINE */
2084         return -1;
2085 #endif /* OPENSSL_NO_ENGINE */
2086 }
2087
2088
2089 static int tls_connection_engine_ca_cert(void *_ssl_ctx,
2090                                          struct tls_connection *conn,
2091                                          const char *ca_cert_id)
2092 {
2093 #ifndef OPENSSL_NO_ENGINE
2094         X509 *cert;
2095         SSL_CTX *ssl_ctx = _ssl_ctx;
2096
2097         if (tls_engine_get_cert(conn, ca_cert_id, &cert))
2098                 return -1;
2099
2100         /* start off the same as tls_connection_ca_cert */
2101         X509_STORE_free(ssl_ctx->cert_store);
2102         ssl_ctx->cert_store = X509_STORE_new();
2103         if (ssl_ctx->cert_store == NULL) {
2104                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2105                            "certificate store", __func__);
2106                 X509_free(cert);
2107                 return -1;
2108         }
2109         if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
2110                 unsigned long err = ERR_peek_error();
2111                 tls_show_errors(MSG_WARNING, __func__,
2112                                 "Failed to add CA certificate from engine "
2113                                 "to certificate store");
2114                 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2115                     ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2116                         wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
2117                                    " already in hash table error",
2118                                    __func__);
2119                 } else {
2120                         X509_free(cert);
2121                         return -1;
2122                 }
2123         }
2124         X509_free(cert);
2125         wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
2126                    "to certificate store", __func__);
2127         SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2128         conn->ca_cert_verify = 1;
2129
2130         return 0;
2131
2132 #else /* OPENSSL_NO_ENGINE */
2133         return -1;
2134 #endif /* OPENSSL_NO_ENGINE */
2135 }
2136
2137
2138 static int tls_connection_engine_private_key(struct tls_connection *conn)
2139 {
2140 #ifndef OPENSSL_NO_ENGINE
2141         if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
2142                 tls_show_errors(MSG_ERROR, __func__,
2143                                 "ENGINE: cannot use private key for TLS");
2144                 return -1;
2145         }
2146         if (!SSL_check_private_key(conn->ssl)) {
2147                 tls_show_errors(MSG_INFO, __func__,
2148                                 "Private key failed verification");
2149                 return -1;
2150         }
2151         return 0;
2152 #else /* OPENSSL_NO_ENGINE */
2153         wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
2154                    "engine support was not compiled in");
2155         return -1;
2156 #endif /* OPENSSL_NO_ENGINE */
2157 }
2158
2159
2160 static int tls_connection_private_key(void *_ssl_ctx,
2161                                       struct tls_connection *conn,
2162                                       const char *private_key,
2163                                       const char *private_key_passwd,
2164                                       const u8 *private_key_blob,
2165                                       size_t private_key_blob_len)
2166 {
2167         SSL_CTX *ssl_ctx = _ssl_ctx;
2168         char *passwd;
2169         int ok;
2170
2171         if (private_key == NULL && private_key_blob == NULL)
2172                 return 0;
2173
2174         if (private_key_passwd) {
2175                 passwd = os_strdup(private_key_passwd);
2176                 if (passwd == NULL)
2177                         return -1;
2178         } else
2179                 passwd = NULL;
2180
2181         SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2182         SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2183
2184         ok = 0;
2185         while (private_key_blob) {
2186                 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
2187                                             (u8 *) private_key_blob,
2188                                             private_key_blob_len) == 1) {
2189                         wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2190                                    "ASN1(EVP_PKEY_RSA) --> OK");
2191                         ok = 1;
2192                         break;
2193                 }
2194
2195                 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
2196                                             (u8 *) private_key_blob,
2197                                             private_key_blob_len) == 1) {
2198                         wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2199                                    "ASN1(EVP_PKEY_DSA) --> OK");
2200                         ok = 1;
2201                         break;
2202                 }
2203
2204                 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2205                                                (u8 *) private_key_blob,
2206                                                private_key_blob_len) == 1) {
2207                         wpa_printf(MSG_DEBUG, "OpenSSL: "
2208                                    "SSL_use_RSAPrivateKey_ASN1 --> OK");
2209                         ok = 1;
2210                         break;
2211                 }
2212
2213                 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
2214                                          private_key_blob_len, passwd) == 0) {
2215                         wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2216                                    "OK");
2217                         ok = 1;
2218                         break;
2219                 }
2220
2221                 break;
2222         }
2223
2224         while (!ok && private_key) {
2225 #ifndef OPENSSL_NO_STDIO
2226                 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2227                                             SSL_FILETYPE_ASN1) == 1) {
2228                         wpa_printf(MSG_DEBUG, "OpenSSL: "
2229                                    "SSL_use_PrivateKey_File (DER) --> OK");
2230                         ok = 1;
2231                         break;
2232                 }
2233
2234                 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2235                                             SSL_FILETYPE_PEM) == 1) {
2236                         wpa_printf(MSG_DEBUG, "OpenSSL: "
2237                                    "SSL_use_PrivateKey_File (PEM) --> OK");
2238                         ok = 1;
2239                         break;
2240                 }
2241 #else /* OPENSSL_NO_STDIO */
2242                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2243                            __func__);
2244 #endif /* OPENSSL_NO_STDIO */
2245
2246                 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
2247                     == 0) {
2248                         wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2249                                    "--> OK");
2250                         ok = 1;
2251                         break;
2252                 }
2253
2254                 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2255                         wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2256                                    "access certificate store --> OK");
2257                         ok = 1;
2258                         break;
2259                 }
2260
2261                 break;
2262         }
2263
2264         if (!ok) {
2265                 tls_show_errors(MSG_INFO, __func__,
2266                                 "Failed to load private key");
2267                 os_free(passwd);
2268                 return -1;
2269         }
2270         ERR_clear_error();
2271         SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2272         os_free(passwd);
2273
2274         if (!SSL_check_private_key(conn->ssl)) {
2275                 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2276                                 "verification");
2277                 return -1;
2278         }
2279
2280         wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2281         return 0;
2282 }
2283
2284
2285 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
2286                                   const char *private_key_passwd)
2287 {
2288         char *passwd;
2289
2290         if (private_key == NULL)
2291                 return 0;
2292
2293         if (private_key_passwd) {
2294                 passwd = os_strdup(private_key_passwd);
2295                 if (passwd == NULL)
2296                         return -1;
2297         } else
2298                 passwd = NULL;
2299
2300         SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2301         SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2302         if (
2303 #ifndef OPENSSL_NO_STDIO
2304             SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2305                                         SSL_FILETYPE_ASN1) != 1 &&
2306             SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2307                                         SSL_FILETYPE_PEM) != 1 &&
2308 #endif /* OPENSSL_NO_STDIO */
2309             tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
2310                 tls_show_errors(MSG_INFO, __func__,
2311                                 "Failed to load private key");
2312                 os_free(passwd);
2313                 ERR_clear_error();
2314                 return -1;
2315         }
2316         os_free(passwd);
2317         ERR_clear_error();
2318         SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2319
2320         if (!SSL_CTX_check_private_key(ssl_ctx)) {
2321                 tls_show_errors(MSG_INFO, __func__,
2322                                 "Private key failed verification");
2323                 return -1;
2324         }
2325
2326         return 0;
2327 }
2328
2329
2330 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2331 {
2332 #ifdef OPENSSL_NO_DH
2333         if (dh_file == NULL)
2334                 return 0;
2335         wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2336                    "dh_file specified");
2337         return -1;
2338 #else /* OPENSSL_NO_DH */
2339         DH *dh;
2340         BIO *bio;
2341
2342         /* TODO: add support for dh_blob */
2343         if (dh_file == NULL)
2344                 return 0;
2345         if (conn == NULL)
2346                 return -1;
2347
2348         bio = BIO_new_file(dh_file, "r");
2349         if (bio == NULL) {
2350                 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2351                            dh_file, ERR_error_string(ERR_get_error(), NULL));
2352                 return -1;
2353         }
2354         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2355         BIO_free(bio);
2356 #ifndef OPENSSL_NO_DSA
2357         while (dh == NULL) {
2358                 DSA *dsa;
2359                 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2360                            " trying to parse as DSA params", dh_file,
2361                            ERR_error_string(ERR_get_error(), NULL));
2362                 bio = BIO_new_file(dh_file, "r");
2363                 if (bio == NULL)
2364                         break;
2365                 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2366                 BIO_free(bio);
2367                 if (!dsa) {
2368                         wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2369                                    "'%s': %s", dh_file,
2370                                    ERR_error_string(ERR_get_error(), NULL));
2371                         break;
2372                 }
2373
2374                 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2375                 dh = DSA_dup_DH(dsa);
2376                 DSA_free(dsa);
2377                 if (dh == NULL) {
2378                         wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2379                                    "params into DH params");
2380                         break;
2381                 }
2382                 break;
2383         }
2384 #endif /* !OPENSSL_NO_DSA */
2385         if (dh == NULL) {
2386                 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2387                            "'%s'", dh_file);
2388                 return -1;
2389         }
2390
2391         if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2392                 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2393                            "%s", dh_file,
2394                            ERR_error_string(ERR_get_error(), NULL));
2395                 DH_free(dh);
2396                 return -1;
2397         }
2398         DH_free(dh);
2399         return 0;
2400 #endif /* OPENSSL_NO_DH */
2401 }
2402
2403
2404 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
2405 {
2406 #ifdef OPENSSL_NO_DH
2407         if (dh_file == NULL)
2408                 return 0;
2409         wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2410                    "dh_file specified");
2411         return -1;
2412 #else /* OPENSSL_NO_DH */
2413         DH *dh;
2414         BIO *bio;
2415
2416         /* TODO: add support for dh_blob */
2417         if (dh_file == NULL)
2418                 return 0;
2419         if (ssl_ctx == NULL)
2420                 return -1;
2421
2422         bio = BIO_new_file(dh_file, "r");
2423         if (bio == NULL) {
2424                 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2425                            dh_file, ERR_error_string(ERR_get_error(), NULL));
2426                 return -1;
2427         }
2428         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2429         BIO_free(bio);
2430 #ifndef OPENSSL_NO_DSA
2431         while (dh == NULL) {
2432                 DSA *dsa;
2433                 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2434                            " trying to parse as DSA params", dh_file,
2435                            ERR_error_string(ERR_get_error(), NULL));
2436                 bio = BIO_new_file(dh_file, "r");
2437                 if (bio == NULL)
2438                         break;
2439                 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2440                 BIO_free(bio);
2441                 if (!dsa) {
2442                         wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2443                                    "'%s': %s", dh_file,
2444                                    ERR_error_string(ERR_get_error(), NULL));
2445                         break;
2446                 }
2447
2448                 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2449                 dh = DSA_dup_DH(dsa);
2450                 DSA_free(dsa);
2451                 if (dh == NULL) {
2452                         wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2453                                    "params into DH params");
2454                         break;
2455                 }
2456                 break;
2457         }
2458 #endif /* !OPENSSL_NO_DSA */
2459         if (dh == NULL) {
2460                 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2461                            "'%s'", dh_file);
2462                 return -1;
2463         }
2464
2465         if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
2466                 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2467                            "%s", dh_file,
2468                            ERR_error_string(ERR_get_error(), NULL));
2469                 DH_free(dh);
2470                 return -1;
2471         }
2472         DH_free(dh);
2473         return 0;
2474 #endif /* OPENSSL_NO_DH */
2475 }
2476
2477
2478 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
2479                             struct tls_keys *keys)
2480 {
2481 #ifdef CONFIG_FIPS
2482         wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS "
2483                    "mode");
2484         return -1;
2485 #else /* CONFIG_FIPS */
2486         SSL *ssl;
2487
2488         if (conn == NULL || keys == NULL)
2489                 return -1;
2490         ssl = conn->ssl;
2491         if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2492                 return -1;
2493
2494         os_memset(keys, 0, sizeof(*keys));
2495         keys->master_key = ssl->session->master_key;
2496         keys->master_key_len = ssl->session->master_key_length;
2497         keys->client_random = ssl->s3->client_random;
2498         keys->client_random_len = SSL3_RANDOM_SIZE;
2499         keys->server_random = ssl->s3->server_random;
2500         keys->server_random_len = SSL3_RANDOM_SIZE;
2501
2502         return 0;
2503 #endif /* CONFIG_FIPS */
2504 }
2505
2506
2507 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2508                        const char *label, int server_random_first,
2509                        u8 *out, size_t out_len)
2510 {
2511 #if OPENSSL_VERSION_NUMBER >= 0x10001000L
2512         SSL *ssl;
2513         if (conn == NULL)
2514                 return -1;
2515         if (server_random_first)
2516                 return -1;
2517         ssl = conn->ssl;
2518         if (SSL_export_keying_material(ssl, out, out_len, label,
2519                                        os_strlen(label), NULL, 0, 0) == 1) {
2520                 wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF");
2521                 return 0;
2522         }
2523 #endif
2524         return -1;
2525 }
2526
2527
2528 static struct wpabuf *
2529 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
2530                   int server)
2531 {
2532         int res;
2533         struct wpabuf *out_data;
2534
2535         /*
2536          * Give TLS handshake data from the server (if available) to OpenSSL
2537          * for processing.
2538          */
2539         if (in_data &&
2540             BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
2541             < 0) {
2542                 tls_show_errors(MSG_INFO, __func__,
2543                                 "Handshake failed - BIO_write");
2544                 return NULL;
2545         }
2546
2547         /* Initiate TLS handshake or continue the existing handshake */
2548         if (server)
2549                 res = SSL_accept(conn->ssl);
2550         else
2551                 res = SSL_connect(conn->ssl);
2552         if (res != 1) {
2553                 int err = SSL_get_error(conn->ssl, res);
2554                 if (err == SSL_ERROR_WANT_READ)
2555                         wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2556                                    "more data");
2557                 else if (err == SSL_ERROR_WANT_WRITE)
2558                         wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2559                                    "write");
2560                 else {
2561                         tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2562                         conn->failed++;
2563                 }
2564         }
2565
2566         /* Get the TLS handshake data to be sent to the server */
2567         res = BIO_ctrl_pending(conn->ssl_out);
2568         wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2569         out_data = wpabuf_alloc(res);
2570         if (out_data == NULL) {
2571                 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2572                            "handshake output (%d bytes)", res);
2573                 if (BIO_reset(conn->ssl_out) < 0) {
2574                         tls_show_errors(MSG_INFO, __func__,
2575                                         "BIO_reset failed");
2576                 }
2577                 return NULL;
2578         }
2579         res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
2580                                       res);
2581         if (res < 0) {
2582                 tls_show_errors(MSG_INFO, __func__,
2583                                 "Handshake failed - BIO_read");
2584                 if (BIO_reset(conn->ssl_out) < 0) {
2585                         tls_show_errors(MSG_INFO, __func__,
2586                                         "BIO_reset failed");
2587                 }
2588                 wpabuf_free(out_data);
2589                 return NULL;
2590         }
2591         wpabuf_put(out_data, res);
2592
2593         return out_data;
2594 }
2595
2596
2597 static struct wpabuf *
2598 openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
2599 {
2600         struct wpabuf *appl_data;
2601         int res;
2602
2603         appl_data = wpabuf_alloc(max_len + 100);
2604         if (appl_data == NULL)
2605                 return NULL;
2606
2607         res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
2608                        wpabuf_size(appl_data));
2609         if (res < 0) {
2610                 int err = SSL_get_error(conn->ssl, res);
2611                 if (err == SSL_ERROR_WANT_READ ||
2612                     err == SSL_ERROR_WANT_WRITE) {
2613                         wpa_printf(MSG_DEBUG, "SSL: No Application Data "
2614                                    "included");
2615                 } else {
2616                         tls_show_errors(MSG_INFO, __func__,
2617                                         "Failed to read possible "
2618                                         "Application Data");
2619                 }
2620                 wpabuf_free(appl_data);
2621                 return NULL;
2622         }
2623
2624         wpabuf_put(appl_data, res);
2625         wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
2626                             "message", appl_data);
2627
2628         return appl_data;
2629 }
2630
2631
2632 static struct wpabuf *
2633 openssl_connection_handshake(struct tls_connection *conn,
2634                              const struct wpabuf *in_data,
2635                              struct wpabuf **appl_data, int server)
2636 {
2637         struct wpabuf *out_data;
2638
2639         if (appl_data)
2640                 *appl_data = NULL;
2641
2642         out_data = openssl_handshake(conn, in_data, server);
2643         if (out_data == NULL)
2644                 return NULL;
2645
2646         if (SSL_is_init_finished(conn->ssl) && appl_data && in_data)
2647                 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data));
2648
2649         return out_data;
2650 }
2651
2652
2653 struct wpabuf *
2654 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2655                          const struct wpabuf *in_data,
2656                          struct wpabuf **appl_data)
2657 {
2658         return openssl_connection_handshake(conn, in_data, appl_data, 0);
2659 }
2660
2661
2662 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
2663                                                 struct tls_connection *conn,
2664                                                 const struct wpabuf *in_data,
2665                                                 struct wpabuf **appl_data)
2666 {
2667         return openssl_connection_handshake(conn, in_data, appl_data, 1);
2668 }
2669
2670
2671 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
2672                                        struct tls_connection *conn,
2673                                        const struct wpabuf *in_data)
2674 {
2675         int res;
2676         struct wpabuf *buf;
2677
2678         if (conn == NULL)
2679                 return NULL;
2680
2681         /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2682         if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2683             (res = BIO_reset(conn->ssl_out)) < 0) {
2684                 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2685                 return NULL;
2686         }
2687         res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
2688         if (res < 0) {
2689                 tls_show_errors(MSG_INFO, __func__,
2690                                 "Encryption failed - SSL_write");
2691                 return NULL;
2692         }
2693
2694         /* Read encrypted data to be sent to the server */
2695         buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
2696         if (buf == NULL)
2697                 return NULL;
2698         res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
2699         if (res < 0) {
2700                 tls_show_errors(MSG_INFO, __func__,
2701                                 "Encryption failed - BIO_read");
2702                 wpabuf_free(buf);
2703                 return NULL;
2704         }
2705         wpabuf_put(buf, res);
2706
2707         return buf;
2708 }
2709
2710
2711 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
2712                                        struct tls_connection *conn,
2713                                        const struct wpabuf *in_data)
2714 {
2715         int res;
2716         struct wpabuf *buf;
2717
2718         /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
2719         res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
2720                         wpabuf_len(in_data));
2721         if (res < 0) {
2722                 tls_show_errors(MSG_INFO, __func__,
2723                                 "Decryption failed - BIO_write");
2724                 return NULL;
2725         }
2726         if (BIO_reset(conn->ssl_out) < 0) {
2727                 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2728                 return NULL;
2729         }
2730
2731         /* Read decrypted data for further processing */
2732         /*
2733          * Even though we try to disable TLS compression, it is possible that
2734          * this cannot be done with all TLS libraries. Add extra buffer space
2735          * to handle the possibility of the decrypted data being longer than
2736          * input data.
2737          */
2738         buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
2739         if (buf == NULL)
2740                 return NULL;
2741         res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
2742         if (res < 0) {
2743                 tls_show_errors(MSG_INFO, __func__,
2744                                 "Decryption failed - SSL_read");
2745                 wpabuf_free(buf);
2746                 return NULL;
2747         }
2748         wpabuf_put(buf, res);
2749
2750         return buf;
2751 }
2752
2753
2754 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2755 {
2756         return conn ? conn->ssl->hit : 0;
2757 }
2758
2759
2760 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2761                                    u8 *ciphers)
2762 {
2763         char buf[100], *pos, *end;
2764         u8 *c;
2765         int ret;
2766
2767         if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2768                 return -1;
2769
2770         buf[0] = '\0';
2771         pos = buf;
2772         end = pos + sizeof(buf);
2773
2774         c = ciphers;
2775         while (*c != TLS_CIPHER_NONE) {
2776                 const char *suite;
2777
2778                 switch (*c) {
2779                 case TLS_CIPHER_RC4_SHA:
2780                         suite = "RC4-SHA";
2781                         break;
2782                 case TLS_CIPHER_AES128_SHA:
2783                         suite = "AES128-SHA";
2784                         break;
2785                 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2786                         suite = "DHE-RSA-AES128-SHA";
2787                         break;
2788                 case TLS_CIPHER_ANON_DH_AES128_SHA:
2789                         suite = "ADH-AES128-SHA";
2790                         break;
2791                 default:
2792                         wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2793                                    "cipher selection: %d", *c);
2794                         return -1;
2795                 }
2796                 ret = os_snprintf(pos, end - pos, ":%s", suite);
2797                 if (ret < 0 || ret >= end - pos)
2798                         break;
2799                 pos += ret;
2800
2801                 c++;
2802         }
2803
2804         wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2805
2806         if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2807                 tls_show_errors(MSG_INFO, __func__,
2808                                 "Cipher suite configuration failed");
2809                 return -1;
2810         }
2811
2812         return 0;
2813 }
2814
2815
2816 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2817                    char *buf, size_t buflen)
2818 {
2819         const char *name;
2820         if (conn == NULL || conn->ssl == NULL)
2821                 return -1;
2822
2823         name = SSL_get_cipher(conn->ssl);
2824         if (name == NULL)
2825                 return -1;
2826
2827         os_strlcpy(buf, name, buflen);
2828         return 0;
2829 }
2830
2831
2832 int tls_connection_enable_workaround(void *ssl_ctx,
2833                                      struct tls_connection *conn)
2834 {
2835         SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2836
2837         return 0;
2838 }
2839
2840
2841 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
2842 /* ClientHello TLS extensions require a patch to openssl, so this function is
2843  * commented out unless explicitly needed for EAP-FAST in order to be able to
2844  * build this file with unmodified openssl. */
2845 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2846                                     int ext_type, const u8 *data,
2847                                     size_t data_len)
2848 {
2849         if (conn == NULL || conn->ssl == NULL || ext_type != 35)
2850                 return -1;
2851
2852 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2853         if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
2854                                        data_len) != 1)
2855                 return -1;
2856 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2857         if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2858                                     data_len) != 1)
2859                 return -1;
2860 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2861
2862         return 0;
2863 }
2864 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
2865
2866
2867 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2868 {
2869         if (conn == NULL)
2870                 return -1;
2871         return conn->failed;
2872 }
2873
2874
2875 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2876 {
2877         if (conn == NULL)
2878                 return -1;
2879         return conn->read_alerts;
2880 }
2881
2882
2883 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2884 {
2885         if (conn == NULL)
2886                 return -1;
2887         return conn->write_alerts;
2888 }
2889
2890
2891 #ifdef HAVE_OCSP
2892
2893 static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
2894 {
2895 #ifndef CONFIG_NO_STDOUT_DEBUG
2896         BIO *out;
2897         size_t rlen;
2898         char *txt;
2899         int res;
2900
2901         if (wpa_debug_level > MSG_DEBUG)
2902                 return;
2903
2904         out = BIO_new(BIO_s_mem());
2905         if (!out)
2906                 return;
2907
2908         OCSP_RESPONSE_print(out, rsp, 0);
2909         rlen = BIO_ctrl_pending(out);
2910         txt = os_malloc(rlen + 1);
2911         if (!txt) {
2912                 BIO_free(out);
2913                 return;
2914         }
2915
2916         res = BIO_read(out, txt, rlen);
2917         if (res > 0) {
2918                 txt[res] = '\0';
2919                 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
2920         }
2921         os_free(txt);
2922         BIO_free(out);
2923 #endif /* CONFIG_NO_STDOUT_DEBUG */
2924 }
2925
2926
2927 static int ocsp_resp_cb(SSL *s, void *arg)
2928 {
2929         struct tls_connection *conn = arg;
2930         const unsigned char *p;
2931         int len, status, reason;
2932         OCSP_RESPONSE *rsp;
2933         OCSP_BASICRESP *basic;
2934         OCSP_CERTID *id;
2935         ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
2936         X509_STORE *store;
2937         STACK_OF(X509) *certs = NULL;
2938
2939         len = SSL_get_tlsext_status_ocsp_resp(s, &p);
2940         if (!p) {
2941                 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
2942                 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
2943         }
2944
2945         wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
2946
2947         rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
2948         if (!rsp) {
2949                 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
2950                 return 0;
2951         }
2952
2953         ocsp_debug_print_resp(rsp);
2954
2955         status = OCSP_response_status(rsp);
2956         if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
2957                 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
2958                            status, OCSP_response_status_str(status));
2959                 return 0;
2960         }
2961
2962         basic = OCSP_response_get1_basic(rsp);
2963         if (!basic) {
2964                 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
2965                 return 0;
2966         }
2967
2968         store = SSL_CTX_get_cert_store(s->ctx);
2969         if (conn->peer_issuer) {
2970                 wpa_printf(MSG_DEBUG, "OpenSSL: Add issuer");
2971                 X509_print_fp(stdout, conn->peer_issuer);
2972
2973                 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
2974                         tls_show_errors(MSG_INFO, __func__,
2975                                         "OpenSSL: Could not add issuer to certificate store\n");
2976                 }
2977                 certs = sk_X509_new_null();
2978                 if (certs) {
2979                         X509 *cert;
2980                         cert = X509_dup(conn->peer_issuer);
2981                         if (cert && !sk_X509_push(certs, cert)) {
2982                                 tls_show_errors(
2983                                         MSG_INFO, __func__,
2984                                         "OpenSSL: Could not add issuer to OCSP responder trust store\n");
2985                                 X509_free(cert);
2986                                 sk_X509_free(certs);
2987                                 certs = NULL;
2988                         }
2989                         if (conn->peer_issuer_issuer) {
2990                                 cert = X509_dup(conn->peer_issuer_issuer);
2991                                 if (cert && !sk_X509_push(certs, cert)) {
2992                                         tls_show_errors(
2993                                                 MSG_INFO, __func__,
2994                                                 "OpenSSL: Could not add issuer to OCSP responder trust store\n");
2995                                         X509_free(cert);
2996                                 }
2997                         }
2998                 }
2999         }
3000
3001         status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
3002         sk_X509_pop_free(certs, X509_free);
3003         if (status <= 0) {
3004                 tls_show_errors(MSG_INFO, __func__,
3005                                 "OpenSSL: OCSP response failed verification");
3006                 OCSP_BASICRESP_free(basic);
3007                 OCSP_RESPONSE_free(rsp);
3008                 return 0;
3009         }
3010
3011         wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
3012
3013         if (!conn->peer_cert) {
3014                 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
3015                 OCSP_BASICRESP_free(basic);
3016                 OCSP_RESPONSE_free(rsp);
3017                 return 0;
3018         }
3019
3020         if (!conn->peer_issuer) {
3021                 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
3022                 OCSP_BASICRESP_free(basic);
3023                 OCSP_RESPONSE_free(rsp);
3024                 return 0;
3025         }
3026
3027         id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
3028         if (!id) {
3029                 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
3030                 OCSP_BASICRESP_free(basic);
3031                 OCSP_RESPONSE_free(rsp);
3032                 return 0;
3033         }
3034
3035         if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
3036                                    &this_update, &next_update)) {
3037                 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
3038                            (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
3039                            " (OCSP not required)");
3040                 OCSP_BASICRESP_free(basic);
3041                 OCSP_RESPONSE_free(rsp);
3042                 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3043         }
3044
3045         if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
3046                 tls_show_errors(MSG_INFO, __func__,
3047                                 "OpenSSL: OCSP status times invalid");
3048                 OCSP_BASICRESP_free(basic);
3049                 OCSP_RESPONSE_free(rsp);
3050                 return 0;
3051         }
3052
3053         OCSP_BASICRESP_free(basic);
3054         OCSP_RESPONSE_free(rsp);
3055
3056         wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
3057                    OCSP_cert_status_str(status));
3058
3059         if (status == V_OCSP_CERTSTATUS_GOOD)
3060                 return 1;
3061         if (status == V_OCSP_CERTSTATUS_REVOKED)
3062                 return 0;
3063         if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
3064                 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
3065                 return 0;
3066         }
3067         wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
3068         return 1;
3069 }
3070
3071
3072 static int ocsp_status_cb(SSL *s, void *arg)
3073 {
3074         char *tmp;
3075         char *resp;
3076         size_t len;
3077
3078         if (tls_global->ocsp_stapling_response == NULL) {
3079                 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
3080                 return SSL_TLSEXT_ERR_OK;
3081         }
3082
3083         resp = os_readfile(tls_global->ocsp_stapling_response, &len);
3084         if (resp == NULL) {
3085                 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
3086                 /* TODO: Build OCSPResponse with responseStatus = internalError
3087                  */
3088                 return SSL_TLSEXT_ERR_OK;
3089         }
3090         wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
3091         tmp = OPENSSL_malloc(len);
3092         if (tmp == NULL) {
3093                 os_free(resp);
3094                 return SSL_TLSEXT_ERR_ALERT_FATAL;
3095         }
3096
3097         os_memcpy(tmp, resp, len);
3098         os_free(resp);
3099         SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
3100
3101         return SSL_TLSEXT_ERR_OK;
3102 }
3103
3104 #endif /* HAVE_OCSP */
3105
3106
3107 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
3108                               const struct tls_connection_params *params)
3109 {
3110         int ret;
3111         unsigned long err;
3112
3113         if (conn == NULL)
3114                 return -1;
3115
3116         while ((err = ERR_get_error())) {
3117                 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3118                            __func__, ERR_error_string(err, NULL));
3119         }
3120
3121         if (params->engine) {
3122                 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
3123                 ret = tls_engine_init(conn, params->engine_id, params->pin,
3124                                       params->key_id, params->cert_id,
3125                                       params->ca_cert_id);
3126                 if (ret)
3127                         return ret;
3128         }
3129         if (tls_connection_set_subject_match(conn,
3130                                              params->subject_match,
3131                                              params->altsubject_match,
3132                                              params->suffix_match))
3133                 return -1;
3134
3135         if (params->engine && params->ca_cert_id) {
3136                 if (tls_connection_engine_ca_cert(tls_ctx, conn,
3137                                                   params->ca_cert_id))
3138                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3139         } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
3140                                           params->ca_cert_blob,
3141                                           params->ca_cert_blob_len,
3142                                           params->ca_path))
3143                 return -1;
3144
3145         if (params->engine && params->cert_id) {
3146                 if (tls_connection_engine_client_cert(conn, params->cert_id))
3147                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3148         } else if (tls_connection_client_cert(conn, params->client_cert,
3149                                               params->client_cert_blob,
3150                                               params->client_cert_blob_len))
3151                 return -1;
3152
3153         if (params->engine && params->key_id) {
3154                 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
3155                 if (tls_connection_engine_private_key(conn))
3156                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3157         } else if (tls_connection_private_key(tls_ctx, conn,
3158                                               params->private_key,
3159                                               params->private_key_passwd,
3160                                               params->private_key_blob,
3161                                               params->private_key_blob_len)) {
3162                 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
3163                            params->private_key);
3164                 return -1;
3165         }
3166
3167         if (tls_connection_dh(conn, params->dh_file)) {
3168                 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
3169                            params->dh_file);
3170                 return -1;
3171         }
3172
3173 #ifdef SSL_OP_NO_TICKET
3174         if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
3175                 SSL_set_options(conn->ssl, SSL_OP_NO_TICKET);
3176 #ifdef SSL_clear_options
3177         else
3178                 SSL_clear_options(conn->ssl, SSL_OP_NO_TICKET);
3179 #endif /* SSL_clear_options */
3180 #endif /*  SSL_OP_NO_TICKET */
3181
3182 #ifdef SSL_OP_NO_TLSv1_1
3183         if (params->flags & TLS_CONN_DISABLE_TLSv1_1)
3184                 SSL_set_options(conn->ssl, SSL_OP_NO_TLSv1_1);
3185         else
3186                 SSL_clear_options(conn->ssl, SSL_OP_NO_TLSv1_1);
3187 #endif /* SSL_OP_NO_TLSv1_1 */
3188 #ifdef SSL_OP_NO_TLSv1_2
3189         if (params->flags & TLS_CONN_DISABLE_TLSv1_2)
3190                 SSL_set_options(conn->ssl, SSL_OP_NO_TLSv1_2);
3191         else
3192                 SSL_clear_options(conn->ssl, SSL_OP_NO_TLSv1_2);
3193 #endif /* SSL_OP_NO_TLSv1_2 */
3194
3195 #ifdef HAVE_OCSP
3196         if (params->flags & TLS_CONN_REQUEST_OCSP) {
3197                 SSL_CTX *ssl_ctx = tls_ctx;
3198                 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
3199                 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
3200                 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
3201         }
3202 #endif /* HAVE_OCSP */
3203
3204         conn->flags = params->flags;
3205
3206         tls_get_errors(tls_ctx);
3207
3208         return 0;
3209 }
3210
3211
3212 int tls_global_set_params(void *tls_ctx,
3213                           const struct tls_connection_params *params)
3214 {
3215         SSL_CTX *ssl_ctx = tls_ctx;
3216         unsigned long err;
3217
3218         while ((err = ERR_get_error())) {
3219                 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3220                            __func__, ERR_error_string(err, NULL));
3221         }
3222
3223         if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
3224                 return -1;
3225
3226         if (tls_global_client_cert(ssl_ctx, params->client_cert))
3227                 return -1;
3228
3229         if (tls_global_private_key(ssl_ctx, params->private_key,
3230                                    params->private_key_passwd))
3231                 return -1;
3232
3233         if (tls_global_dh(ssl_ctx, params->dh_file)) {
3234                 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
3235                            params->dh_file);
3236                 return -1;
3237         }
3238
3239 #ifdef SSL_OP_NO_TICKET
3240         if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
3241                 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
3242 #ifdef SSL_CTX_clear_options
3243         else
3244                 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
3245 #endif /* SSL_clear_options */
3246 #endif /*  SSL_OP_NO_TICKET */
3247
3248 #ifdef HAVE_OCSP
3249         SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
3250         SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
3251         os_free(tls_global->ocsp_stapling_response);
3252         if (params->ocsp_stapling_response)
3253                 tls_global->ocsp_stapling_response =
3254                         os_strdup(params->ocsp_stapling_response);
3255         else
3256                 tls_global->ocsp_stapling_response = NULL;
3257 #endif /* HAVE_OCSP */
3258
3259         return 0;
3260 }
3261
3262
3263 int tls_connection_get_keyblock_size(void *tls_ctx,
3264                                      struct tls_connection *conn)
3265 {
3266         const EVP_CIPHER *c;
3267         const EVP_MD *h;
3268         int md_size;
3269
3270         if (conn == NULL || conn->ssl == NULL ||
3271             conn->ssl->enc_read_ctx == NULL ||
3272             conn->ssl->enc_read_ctx->cipher == NULL ||
3273             conn->ssl->read_hash == NULL)
3274                 return -1;
3275
3276         c = conn->ssl->enc_read_ctx->cipher;
3277 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
3278         h = EVP_MD_CTX_md(conn->ssl->read_hash);
3279 #else
3280         h = conn->ssl->read_hash;
3281 #endif
3282         if (h)
3283                 md_size = EVP_MD_size(h);
3284 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
3285         else if (conn->ssl->s3)
3286                 md_size = conn->ssl->s3->tmp.new_mac_secret_size;
3287 #endif
3288         else
3289                 return -1;
3290
3291         wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
3292                    "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
3293                    EVP_CIPHER_iv_length(c));
3294         return 2 * (EVP_CIPHER_key_length(c) +
3295                     md_size +
3296                     EVP_CIPHER_iv_length(c));
3297 }
3298
3299
3300 unsigned int tls_capabilities(void *tls_ctx)
3301 {
3302         return 0;
3303 }
3304
3305
3306 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3307 /* Pre-shared secred requires a patch to openssl, so this function is
3308  * commented out unless explicitly needed for EAP-FAST in order to be able to
3309  * build this file with unmodified openssl. */
3310
3311 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
3312                            STACK_OF(SSL_CIPHER) *peer_ciphers,
3313                            SSL_CIPHER **cipher, void *arg)
3314 {
3315         struct tls_connection *conn = arg;
3316         int ret;
3317
3318         if (conn == NULL || conn->session_ticket_cb == NULL)
3319                 return 0;
3320
3321         ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
3322                                       conn->session_ticket,
3323                                       conn->session_ticket_len,
3324                                       s->s3->client_random,
3325                                       s->s3->server_random, secret);
3326         os_free(conn->session_ticket);
3327         conn->session_ticket = NULL;
3328
3329         if (ret <= 0)
3330                 return 0;
3331
3332         *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
3333         return 1;
3334 }
3335
3336
3337 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3338 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
3339                                      int len, void *arg)
3340 {
3341         struct tls_connection *conn = arg;
3342
3343         if (conn == NULL || conn->session_ticket_cb == NULL)
3344                 return 0;
3345
3346         wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
3347
3348         os_free(conn->session_ticket);
3349         conn->session_ticket = NULL;
3350
3351         wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3352                     "extension", data, len);
3353
3354         conn->session_ticket = os_malloc(len);
3355         if (conn->session_ticket == NULL)
3356                 return 0;
3357
3358         os_memcpy(conn->session_ticket, data, len);
3359         conn->session_ticket_len = len;
3360
3361         return 1;
3362 }
3363 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3364 #ifdef SSL_OP_NO_TICKET
3365 static void tls_hello_ext_cb(SSL *s, int client_server, int type,
3366                              unsigned char *data, int len, void *arg)
3367 {
3368         struct tls_connection *conn = arg;
3369
3370         if (conn == NULL || conn->session_ticket_cb == NULL)
3371                 return;
3372
3373         wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
3374                    type, len);
3375
3376         if (type == TLSEXT_TYPE_session_ticket && !client_server) {
3377                 os_free(conn->session_ticket);
3378                 conn->session_ticket = NULL;
3379
3380                 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3381                             "extension", data, len);
3382                 conn->session_ticket = os_malloc(len);
3383                 if (conn->session_ticket == NULL)
3384                         return;
3385
3386                 os_memcpy(conn->session_ticket, data, len);
3387                 conn->session_ticket_len = len;
3388         }
3389 }
3390 #else /* SSL_OP_NO_TICKET */
3391 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
3392 {
3393         struct tls_connection *conn = arg;
3394
3395         if (conn == NULL || conn->session_ticket_cb == NULL)
3396                 return 0;
3397
3398         wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
3399                    ext->type, ext->length);
3400
3401         os_free(conn->session_ticket);
3402         conn->session_ticket = NULL;
3403
3404         if (ext->type == 35) {
3405                 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3406                             "extension", ext->data, ext->length);
3407                 conn->session_ticket = os_malloc(ext->length);
3408                 if (conn->session_ticket == NULL)
3409                         return SSL_AD_INTERNAL_ERROR;
3410
3411                 os_memcpy(conn->session_ticket, ext->data, ext->length);
3412                 conn->session_ticket_len = ext->length;
3413         }
3414
3415         return 0;
3416 }
3417 #endif /* SSL_OP_NO_TICKET */
3418 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3419 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3420
3421
3422 int tls_connection_set_session_ticket_cb(void *tls_ctx,
3423                                          struct tls_connection *conn,
3424                                          tls_session_ticket_cb cb,
3425                                          void *ctx)
3426 {
3427 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3428         conn->session_ticket_cb = cb;
3429         conn->session_ticket_cb_ctx = ctx;
3430
3431         if (cb) {
3432                 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
3433                                               conn) != 1)
3434                         return -1;
3435 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3436                 SSL_set_session_ticket_ext_cb(conn->ssl,
3437                                               tls_session_ticket_ext_cb, conn);
3438 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3439 #ifdef SSL_OP_NO_TICKET
3440                 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
3441                 SSL_set_tlsext_debug_arg(conn->ssl, conn);
3442 #else /* SSL_OP_NO_TICKET */
3443                 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
3444                                                conn) != 1)
3445                         return -1;
3446 #endif /* SSL_OP_NO_TICKET */
3447 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3448         } else {
3449                 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
3450                         return -1;
3451 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3452                 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
3453 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3454 #ifdef SSL_OP_NO_TICKET
3455                 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
3456                 SSL_set_tlsext_debug_arg(conn->ssl, conn);
3457 #else /* SSL_OP_NO_TICKET */
3458                 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
3459                         return -1;
3460 #endif /* SSL_OP_NO_TICKET */
3461 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
3462         }
3463
3464         return 0;
3465 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3466         return -1;
3467 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3468 }