1 /* Copyright (c) 2007-2009, UNINETT AS
2 * Copyright (c) 2010-2011, NORDUnet A/S */
3 /* See COPYING for licensing information. */
5 #if defined HAVE_CONFIG_H
11 #include <sys/socket.h>
12 #include <netinet/in.h>
21 #include <sys/select.h>
24 #include <arpa/inet.h>
28 #include <openssl/ssl.h>
29 #include <openssl/rand.h>
30 #include <openssl/err.h>
31 #include <openssl/md5.h>
32 #include <openssl/x509v3.h>
33 #include "rsp_debug.h"
37 #include "../hostport_types.h"
38 #include "../radsecproxy.h"
40 static struct hash *tlsconfs = NULL;
46 SSL_load_error_strings();
49 while (!RAND_status()) {
52 RAND_seed((unsigned char *)&t, sizeof(time_t));
53 RAND_seed((unsigned char *)&pid, sizeof(pid));
57 static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) {
58 int pwdlen = strlen(userdata);
59 if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */
61 memcpy(buf, userdata, pwdlen);
65 static int verify_cb(int ok, X509_STORE_CTX *ctx) {
70 err_cert = X509_STORE_CTX_get_current_cert(ctx);
71 err = X509_STORE_CTX_get_error(ctx);
72 depth = X509_STORE_CTX_get_error_depth(ctx);
74 if (depth > MAX_CERT_DEPTH) {
76 err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
77 X509_STORE_CTX_set_error(ctx, err);
82 buf = X509_NAME_oneline(X509_get_subject_name(err_cert), NULL, 0);
83 debug(DBG_WARN, "verify error: num=%d:%s:depth=%d:%s", err, X509_verify_cert_error_string(err), depth, buf ? buf : "");
88 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
90 buf = X509_NAME_oneline(X509_get_issuer_name(err_cert), NULL, 0);
92 debug(DBG_WARN, "\tIssuer=%s", buf);
98 case X509_V_ERR_CERT_NOT_YET_VALID:
99 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
100 debug(DBG_WARN, "\tCertificate not yet valid");
102 case X509_V_ERR_CERT_HAS_EXPIRED:
103 debug(DBG_WARN, "Certificate has expired");
105 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
106 debug(DBG_WARN, "Certificate no longer valid (after notAfter)");
108 case X509_V_ERR_NO_EXPLICIT_POLICY:
109 debug(DBG_WARN, "No Explicit Certificate Policy");
117 static void ssl_info_callback(const SSL *ssl, int where, int ret) {
121 w = where & ~SSL_ST_MASK;
123 if (w & SSL_ST_CONNECT)
125 else if (w & SSL_ST_ACCEPT)
130 if (where & SSL_CB_LOOP)
131 debug(DBG_DBG, "%s:%s\n", s, SSL_state_string_long(ssl));
132 else if (where & SSL_CB_ALERT) {
133 s = (where & SSL_CB_READ) ? "read" : "write";
134 debug(DBG_DBG, "SSL3 alert %s:%s:%s\n", s, SSL_alert_type_string_long(ret), SSL_alert_desc_string_long(ret));
136 else if (where & SSL_CB_EXIT) {
138 debug(DBG_DBG, "%s:failed in %s\n", s, SSL_state_string_long(ssl));
140 debug(DBG_DBG, "%s:error in %s\n", s, SSL_state_string_long(ssl));
145 static X509_VERIFY_PARAM *createverifyparams(char **poids) {
146 X509_VERIFY_PARAM *pm;
147 ASN1_OBJECT *pobject;
150 pm = X509_VERIFY_PARAM_new();
154 for (i = 0; poids[i]; i++) {
155 pobject = OBJ_txt2obj(poids[i], 0);
157 X509_VERIFY_PARAM_free(pm);
160 X509_VERIFY_PARAM_add0_policy(pm, pobject);
163 X509_VERIFY_PARAM_set_flags(pm, X509_V_FLAG_POLICY_CHECK | X509_V_FLAG_EXPLICIT_POLICY);
167 static int tlsaddcacrl(SSL_CTX *ctx, struct tls *conf) {
168 STACK_OF(X509_NAME) *calist;
172 if (!SSL_CTX_load_verify_locations(ctx, conf->cacertfile, conf->cacertpath)) {
173 while ((error = ERR_get_error()))
174 debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
175 debug(DBG_ERR, "tlsaddcacrl: Error updating TLS context %s", conf->name);
179 calist = conf->cacertfile ? SSL_load_client_CA_file(conf->cacertfile) : NULL;
181 if (!conf->cacertfile || calist) {
182 if (conf->cacertpath) {
184 calist = sk_X509_NAME_new_null();
185 if (!SSL_add_dir_cert_subjects_to_stack(calist, conf->cacertpath)) {
186 sk_X509_NAME_free(calist);
192 while ((error = ERR_get_error()))
193 debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
194 debug(DBG_ERR, "tlsaddcacrl: Error adding CA subjects in TLS context %s", conf->name);
197 ERR_clear_error(); /* add_dir_cert_subj returns errors on success */
198 SSL_CTX_set_client_CA_list(ctx, calist);
200 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, verify_cb);
201 SSL_CTX_set_verify_depth(ctx, MAX_CERT_DEPTH + 1);
203 if (conf->crlcheck || conf->vpm) {
204 x509_s = SSL_CTX_get_cert_store(ctx);
206 X509_STORE_set_flags(x509_s, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
208 X509_STORE_set1_param(x509_s, conf->vpm);
211 debug(DBG_DBG, "tlsaddcacrl: updated TLS context %s", conf->name);
215 static SSL_CTX *tlscreatectx(uint8_t type, struct tls *conf) {
222 ctx = SSL_CTX_new(TLSv1_method());
227 ctx = SSL_CTX_new(DTLSv1_method());
228 SSL_CTX_set_read_ahead(ctx, 1);
233 debug(DBG_ERR, "tlscreatectx: Error initialising SSL/TLS in TLS context %s", conf->name);
234 while ((error = ERR_get_error()))
235 debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
239 SSL_CTX_set_info_callback(ctx, ssl_info_callback);
242 if (conf->certkeypwd) {
243 SSL_CTX_set_default_passwd_cb_userdata(ctx, conf->certkeypwd);
244 SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb);
246 if (conf->certfile || conf->certkeyfile) {
247 if (!SSL_CTX_use_certificate_chain_file(ctx, conf->certfile) ||
248 !SSL_CTX_use_PrivateKey_file(ctx, conf->certkeyfile, SSL_FILETYPE_PEM) ||
249 !SSL_CTX_check_private_key(ctx)) {
250 while ((error = ERR_get_error()))
251 debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
252 debug(DBG_ERR, "tlscreatectx: Error initialising SSL/TLS (certfile issues) in TLS context %s", conf->name);
258 if (conf->policyoids) {
260 conf->vpm = createverifyparams(conf->policyoids);
262 debug(DBG_ERR, "tlscreatectx: Failed to add policyOIDs in TLS context %s", conf->name);
269 if (conf->cacertfile != NULL || conf->cacertpath != NULL)
270 if (!tlsaddcacrl(ctx, conf)) {
272 X509_VERIFY_PARAM_free(conf->vpm);
279 debug(DBG_DBG, "tlscreatectx: created TLS context %s", conf->name);
283 struct tls *tlsgettls(char *alt1, char *alt2) {
286 t = hash_read(tlsconfs, alt1, strlen(alt1));
288 t = hash_read(tlsconfs, alt2, strlen(alt2));
292 SSL_CTX *tlsgetctx(uint8_t type, struct tls *t) {
297 gettimeofday(&now, NULL);
302 if (t->tlsexpiry && t->tlsctx) {
303 if (t->tlsexpiry < now.tv_sec) {
304 t->tlsexpiry = now.tv_sec + t->cacheexpiry;
305 tlsaddcacrl(t->tlsctx, t);
309 t->tlsctx = tlscreatectx(RAD_TLS, t);
311 t->tlsexpiry = now.tv_sec + t->cacheexpiry;
317 if (t->dtlsexpiry && t->dtlsctx) {
318 if (t->dtlsexpiry < now.tv_sec) {
319 t->dtlsexpiry = now.tv_sec + t->cacheexpiry;
320 tlsaddcacrl(t->dtlsctx, t);
324 t->dtlsctx = tlscreatectx(RAD_DTLS, t);
326 t->dtlsexpiry = now.tv_sec + t->cacheexpiry;
334 X509 *verifytlscert(SSL *ssl) {
338 if (SSL_get_verify_result(ssl) != X509_V_OK) {
339 debug(DBG_ERR, "verifytlscert: basic validation failed");
340 while ((error = ERR_get_error()))
341 debug(DBG_ERR, "verifytlscert: TLS: %s", ERR_error_string(error, NULL));
345 cert = SSL_get_peer_certificate(ssl);
347 debug(DBG_ERR, "verifytlscert: failed to obtain certificate");
351 int subjectaltnameaddr(X509 *cert, int family, const struct in6_addr *addr) {
352 int loc, i, l, n, r = 0;
355 STACK_OF(GENERAL_NAME) *alt;
358 debug(DBG_DBG, "subjectaltnameaddr");
360 loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
364 ex = X509_get_ext(cert, loc);
365 alt = X509V3_EXT_d2i(ex);
369 n = sk_GENERAL_NAME_num(alt);
370 for (i = 0; i < n; i++) {
371 gn = sk_GENERAL_NAME_value(alt, i);
372 if (gn->type != GEN_IPADD)
375 v = (char *)ASN1_STRING_data(gn->d.ia5);
376 l = ASN1_STRING_length(gn->d.ia5);
377 if (((family == AF_INET && l == sizeof(struct in_addr)) || (family == AF_INET6 && l == sizeof(struct in6_addr)))
378 && !memcmp(v, &addr, l)) {
383 GENERAL_NAMES_free(alt);
387 int subjectaltnameregexp(X509 *cert, int type, const char *exact, const regex_t *regex) {
388 int loc, i, l, n, r = 0;
391 STACK_OF(GENERAL_NAME) *alt;
394 debug(DBG_DBG, "subjectaltnameregexp");
396 loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
400 ex = X509_get_ext(cert, loc);
401 alt = X509V3_EXT_d2i(ex);
405 n = sk_GENERAL_NAME_num(alt);
406 for (i = 0; i < n; i++) {
407 gn = sk_GENERAL_NAME_value(alt, i);
408 if (gn->type != type)
411 v = (char *)ASN1_STRING_data(gn->d.ia5);
412 l = ASN1_STRING_length(gn->d.ia5);
416 printfchars(NULL, gn->type == GEN_DNS ? "dns" : "uri", NULL, v, l);
419 if (memcmp(v, exact, l))
422 s = stringcopy((char *)v, l);
424 debug(DBG_ERR, "malloc failed");
427 if (regexec(regex, s, 0, NULL, 0)) {
436 GENERAL_NAMES_free(alt);
440 int cnregexp(X509 *cert, const char *exact, const regex_t *regex) {
447 nm = X509_get_subject_name(cert);
450 loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc);
453 e = X509_NAME_get_entry(nm, loc);
454 t = X509_NAME_ENTRY_get_data(e);
455 v = (char *) ASN1_STRING_data(t);
456 l = ASN1_STRING_length(t);
460 if (l == strlen(exact) && !strncasecmp(exact, v, l))
463 s = stringcopy((char *)v, l);
465 debug(DBG_ERR, "malloc failed");
468 if (regexec(regex, s, 0, NULL, 0)) {
479 /* this is a bit sloppy, should not always accept match to any */
480 int certnamecheck(X509 *cert, struct list *hostports) {
481 struct list_node *entry;
482 struct hostportres *hp;
484 uint8_t type = 0; /* 0 for DNS, AF_INET for IPv4, AF_INET6 for IPv6 */
485 struct in6_addr addr;
487 for (entry = list_first(hostports); entry; entry = list_next(entry)) {
488 hp = (struct hostportres *)entry->data;
489 if (hp->prefixlen != 255) {
490 /* we disable the check for prefixes */
493 if (inet_pton(AF_INET, hp->host, &addr))
495 else if (inet_pton(AF_INET6, hp->host, &addr))
500 r = type ? subjectaltnameaddr(cert, type, &addr) : subjectaltnameregexp(cert, GEN_DNS, hp->host, NULL);
503 debug(DBG_DBG, "certnamecheck: Found subjectaltname matching %s %s", type ? "address" : "host", hp->host);
506 debug(DBG_WARN, "certnamecheck: No subjectaltname matching %s %s", type ? "address" : "host", hp->host);
508 if (cnregexp(cert, hp->host, NULL)) {
509 debug(DBG_DBG, "certnamecheck: Found cn matching host %s", hp->host);
512 debug(DBG_WARN, "certnamecheck: cn not matching host %s", hp->host);
518 int verifyconfcert(X509 *cert, struct clsrvconf *conf) {
519 if (conf->certnamecheck) {
520 if (!certnamecheck(cert, conf->hostports)) {
521 debug(DBG_WARN, "verifyconfcert: certificate name check failed");
524 debug(DBG_WARN, "verifyconfcert: certificate name check ok");
526 if (conf->certcnregex) {
527 if (cnregexp(cert, NULL, conf->certcnregex) < 1) {
528 debug(DBG_WARN, "verifyconfcert: CN not matching regex");
531 debug(DBG_DBG, "verifyconfcert: CN matching regex");
533 if (conf->certuriregex) {
534 if (subjectaltnameregexp(cert, GEN_URI, NULL, conf->certuriregex) < 1) {
535 debug(DBG_WARN, "verifyconfcert: subjectaltname URI not matching regex");
538 debug(DBG_DBG, "verifyconfcert: subjectaltname URI matching regex");
543 /* Local Variables: */
544 /* c-file-style: "stroustrup" */