mech_eap/gssapiP_eap.h

   1 /*
   2  * Copyright (c) 2011, JANET(UK)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of JANET(UK) nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #ifndef _GSSAPIP_EAP_H_
  34 #define _GSSAPIP_EAP_H_ 1
  35
  36 #include "config.h"
  37
  38 #ifdef HAVE_HEIMDAL_VERSION
  39 #define KRB5_DEPRECATED         /* so we can use krb5_free_unparsed_name() */
  40 #endif
  41
  42 #include <assert.h>
  43 #include <string.h>
  44 #include <errno.h>
  45 #ifdef HAVE_UNISTD_H
  46 #include <unistd.h>
  47 #endif
  48 #ifdef HAVE_STDLIB_H
  49 #include <stdlib.h>
  50 #endif
  51 #ifdef HAVE_STDARG_H
  52 #include <stdarg.h>
  53 #endif
  54 #include <time.h>
  55 #ifdef HAVE_SYS_PARAM_H
  56 #include <sys/param.h>
  57 #endif
  58
  59 #ifdef WIN32
  60 #ifndef MAXHOSTNAMELEN
  61 # include <WinSock2.h>
  62 # define MAXHOSTNAMELEN NI_MAXHOST
  63 #endif
  64 #endif
  65
  66 /* GSS headers */
  67 #include <gssapi/gssapi.h>
  68 #include <gssapi/gssapi_krb5.h>
  69 #ifdef HAVE_HEIMDAL_VERSION
  70 typedef struct gss_any *gss_any_t;
  71 #else
  72 #include <gssapi/gssapi_ext.h>
  73 #endif
  74 #include "gssapi_eap.h"
  75
  76 #ifndef HAVE_GSS_INQUIRE_ATTRS_FOR_MECH
  77 typedef const gss_OID_desc *gss_const_OID;
  78 #endif
  79
  80 /* Kerberos headers */
  81 #include <krb5.h>
  82
  83 /* EAP headers */
  84 #include <includes.h>
  85 #include <common.h>
  86 #include <eap_peer/eap.h>
  87 #include <eap_peer/eap_config.h>
  88 #include <eap_peer/eap_methods.h>
  89 #include <eap_common/eap_common.h>
  90 #include <wpabuf.h>
  91
  92 #ifdef GSSEAP_ENABLE_ACCEPTOR
  93 /* libradsec headers */
  94 #include <radsec/radsec.h>
  95 #include <radsec/request.h>
  96 #include <radsec/radius.h>
  97 #endif
  98
  99 #include "gsseap_err.h"
 100 #include "radsec_err.h"
 101 #include "util.h"
 102
 103 #ifdef __cplusplus
 104 extern "C" {
 105 #endif
 106
 107 /* These name flags are informative and not actually used by anything yet */
 108 #define NAME_FLAG_NAI                       0x00000001
 109 #define NAME_FLAG_SERVICE                   0x00000002
 110 #define NAME_FLAG_COMPOSITE                 0x00000004
 111
 112 struct gss_eap_saml_attr_ctx;
 113 struct gss_eap_attr_ctx;
 114
 115 #ifdef HAVE_HEIMDAL_VERSION
 116 struct gss_name_t_desc_struct
 117 #else
 118 struct gss_name_struct
 119 #endif
 120 {
 121     GSSEAP_MUTEX mutex; /* mutex protects attrCtx */
 122     OM_uint32 flags;
 123     gss_OID mechanismUsed; /* this is immutable */
 124     krb5_principal krbPrincipal; /* this is immutable */
 125 #ifdef GSSEAP_ENABLE_ACCEPTOR
 126     struct gss_eap_attr_ctx *attrCtx;
 127 #endif
 128 };
 129
 130 #define CRED_FLAG_INITIATE                  0x00010000
 131 #define CRED_FLAG_ACCEPT                    0x00020000
 132 #define CRED_FLAG_PASSWORD                  0x00040000
 133 #define CRED_FLAG_DEFAULT_CCACHE            0x00080000
 134 #define CRED_FLAG_RESOLVED                  0x00100000
 135 #define CRED_FLAG_TARGET                    0x00200000
 136 #define CRED_FLAG_CERTIFICATE               0x00400000
 137 #define CRED_FLAG_CONFIG_BLOB               0x00800000
 138 #define CRED_FLAG_PUBLIC_MASK               0x0000FFFF
 139
 140 #ifdef HAVE_HEIMDAL_VERSION
 141 struct gss_cred_id_t_desc_struct
 142 #else
 143 struct gss_cred_id_struct
 144 #endif
 145 {
 146     GSSEAP_MUTEX mutex;
 147     OM_uint32 flags;
 148     gss_name_t name;
 149     gss_name_t target; /* for initiator */
 150     gss_buffer_desc password;
 151     gss_OID_set mechanisms;
 152     time_t expiryTime;
 153     gss_buffer_desc radiusConfigFile;
 154     gss_buffer_desc radiusConfigStanza;
 155     gss_buffer_desc caCertificate;
 156     gss_buffer_desc subjectNameConstraint;
 157     gss_buffer_desc subjectAltNameConstraint;
 158     gss_buffer_desc clientCertificate;
 159     gss_buffer_desc privateKey;
 160     gss_buffer_desc caCertificateBlob;
 161 #ifdef GSSEAP_ENABLE_REAUTH
 162     krb5_ccache krbCredCache;
 163     gss_cred_id_t reauthCred;
 164 #endif
 165 };
 166
 167 #define CTX_FLAG_INITIATOR                  0x00000001
 168 #define CTX_FLAG_KRB_REAUTH                 0x00000002
 169 #define CTX_FLAG_CHANNEL_BINDINGS_VERIFIED  0x00000004
 170
 171 #define CTX_IS_INITIATOR(ctx)               (((ctx)->flags & CTX_FLAG_INITIATOR) != 0)
 172
 173 #define CTX_IS_ESTABLISHED(ctx)             ((ctx)->state == GSSEAP_STATE_ESTABLISHED)
 174
 175 /* Initiator context flags */
 176 #define CTX_FLAG_EAP_SUCCESS                0x00010000
 177 #define CTX_FLAG_EAP_RESTART                0x00020000
 178 #define CTX_FLAG_EAP_FAIL                   0x00040000
 179 #define CTX_FLAG_EAP_RESP                   0x00080000
 180 #define CTX_FLAG_EAP_NO_RESP                0x00100000
 181 #define CTX_FLAG_EAP_REQ                    0x00200000
 182 #define CTX_FLAG_EAP_PORT_ENABLED           0x00400000
 183 #define CTX_FLAG_EAP_ALT_ACCEPT             0x00800000
 184 #define CTX_FLAG_EAP_ALT_REJECT             0x01000000
 185 #define CTX_FLAG_EAP_CHBIND_ACCEPT          0x02000000
 186 #define CTX_FLAG_EAP_TRIGGER_START          0x04000000
 187 #define CTX_FLAG_EAP_MASK                   0xFFFF0000
 188
 189 #define CONFIG_BLOB_CLIENT_CERT             0
 190 #define CONFIG_BLOB_PRIVATE_KEY             1
 191 #define CONFIG_BLOB_CA_CERT                 2
 192 #define CONFIG_BLOB_MAX                     3
 193
 194 struct gss_eap_initiator_ctx {
 195     unsigned int idleWhile;
 196     struct eap_peer_config eapPeerConfig;
 197     struct eap_sm *eap;
 198     struct wpabuf reqData;
 199     struct wpabuf *chbindData;
 200     unsigned int chbindReqFlags;
 201     struct wpa_config_blob configBlobs[CONFIG_BLOB_MAX];
 202 };
 203
 204 #ifdef GSSEAP_ENABLE_ACCEPTOR
 205 struct gss_eap_acceptor_ctx {
 206     struct rs_context *radContext;
 207     struct rs_connection *radConn;
 208     char *radServer;
 209     gss_buffer_desc state;
 210     rs_avp *vps;
 211 };
 212 #endif
 213
 214 #ifdef HAVE_HEIMDAL_VERSION
 215 struct gss_ctx_id_t_desc_struct
 216 #else
 217 struct gss_ctx_id_struct
 218 #endif
 219 {
 220     GSSEAP_MUTEX mutex;
 221     enum gss_eap_state state;
 222     OM_uint32 flags;
 223     OM_uint32 gssFlags;
 224     gss_OID mechanismUsed;
 225     krb5_cksumtype checksumType;
 226     krb5_enctype encryptionType;
 227     krb5_keyblock rfc3961Key;
 228     gss_name_t initiatorName;
 229     gss_name_t acceptorName;
 230     time_t expiryTime;
 231     uint64_t sendSeq, recvSeq;
 232     void *seqState;
 233     gss_cred_id_t cred;
 234     union {
 235         struct gss_eap_initiator_ctx initiator;
 236         #define initiatorCtx         ctxU.initiator
 237 #ifdef GSSEAP_ENABLE_ACCEPTOR
 238         struct gss_eap_acceptor_ctx  acceptor;
 239         #define acceptorCtx          ctxU.acceptor
 240 #endif
 241 #ifdef GSSEAP_ENABLE_REAUTH
 242         gss_ctx_id_t                 reauth;
 243         #define reauthCtx            ctxU.reauth
 244 #endif
 245     } ctxU;
 246     const struct gss_eap_token_buffer_set *inputTokens;
 247     const struct gss_eap_token_buffer_set *outputTokens;
 248 };
 249
 250 #define TOK_FLAG_SENDER_IS_ACCEPTOR         0x01
 251 #define TOK_FLAG_WRAP_CONFIDENTIAL          0x02
 252 #define TOK_FLAG_ACCEPTOR_SUBKEY            0x04
 253
 254 #define KEY_USAGE_ACCEPTOR_SEAL             22
 255 #define KEY_USAGE_ACCEPTOR_SIGN             23
 256 #define KEY_USAGE_INITIATOR_SEAL            24
 257 #define KEY_USAGE_INITIATOR_SIGN            25
 258
 259 #define KEY_USAGE_GSSEAP_CHBIND_MIC         60
 260 #define KEY_USAGE_GSSEAP_ACCTOKEN_MIC       61
 261 #define KEY_USAGE_GSSEAP_INITOKEN_MIC       62
 262
 263 /* accept_sec_context.c */
 264 OM_uint32
 265 gssEapAcceptSecContext(OM_uint32 *minor,
 266                        gss_ctx_id_t ctx,
 267                        gss_cred_id_t cred,
 268                        gss_buffer_t input_token,
 269                        gss_channel_bindings_t input_chan_bindings,
 270                        gss_name_t *src_name,
 271                        gss_OID *mech_type,
 272                        gss_buffer_t output_token,
 273                        OM_uint32 *ret_flags,
 274                        OM_uint32 *time_rec,
 275                        gss_cred_id_t *delegated_cred_handle);
 276
 277 /* init_sec_context.c */
 278 OM_uint32
 279 gssEapInitSecContext(OM_uint32 *minor,
 280                      gss_cred_id_t cred,
 281                      gss_ctx_id_t ctx,
 282                      gss_name_t target_name,
 283                      gss_OID mech_type,
 284                      OM_uint32 req_flags,
 285                      OM_uint32 time_req,
 286                      gss_channel_bindings_t input_chan_bindings,
 287                      gss_buffer_t input_token,
 288                      gss_OID *actual_mech_type,
 289                      gss_buffer_t output_token,
 290                      OM_uint32 *ret_flags,
 291                      OM_uint32 *time_rec);
 292
 293 /* wrap_iov.c */
 294 OM_uint32
 295 gssEapWrapOrGetMIC(OM_uint32 *minor,
 296                    gss_ctx_id_t ctx,
 297                    int conf_req_flag,
 298                    int *conf_state,
 299                    gss_iov_buffer_desc *iov,
 300                    int iov_count,
 301                    enum gss_eap_token_type toktype);
 302
 303 OM_uint32
 304 gssEapUnwrapOrVerifyMIC(OM_uint32 *minor_status,
 305                         gss_ctx_id_t ctx,
 306                         int *conf_state,
 307                         gss_qop_t *qop_state,
 308                         gss_iov_buffer_desc *iov,
 309                         int iov_count,
 310                         enum gss_eap_token_type toktype);
 311
 312 OM_uint32
 313 gssEapWrapIovLength(OM_uint32 *minor,
 314                     gss_ctx_id_t ctx,
 315                     int conf_req_flag,
 316                     gss_qop_t qop_req,
 317                     int *conf_state,
 318                     gss_iov_buffer_desc *iov,
 319                     int iov_count);
 320 OM_uint32
 321 gssEapWrap(OM_uint32 *minor,
 322            gss_ctx_id_t ctx,
 323            int conf_req_flag,
 324            gss_qop_t qop_req,
 325            gss_buffer_t input_message_buffer,
 326            int *conf_state,
 327            gss_buffer_t output_message_buffer);
 328
 329 unsigned char
 330 rfc4121Flags(gss_ctx_id_t ctx, int receiving);
 331
 332 /* display_status.c */
 333 void
 334 gssEapSaveStatusInfo(OM_uint32 minor, const char *format, ...);
 335
 336 OM_uint32
 337 gssEapDisplayStatus(OM_uint32 *minor,
 338                     OM_uint32 status_value,
 339                     gss_buffer_t status_string);
 340
 341 #define IS_WIRE_ERROR(err)              ((err) >= GSSEAP_RESERVED && \
 342                                          (err) <= GSSEAP_RADIUS_PROT_FAILURE)
 343
 344 #ifdef GSSEAP_ENABLE_ACCEPTOR
 345 #define IS_RADIUS_ERROR(err)            ((err) >= ERROR_TABLE_BASE_rse && \
 346                                          (err) <= ERROR_TABLE_BASE_rse + RSE_MAX)
 347 #else
 348 #define IS_RADIUS_ERROR(err)            (0)
 349 #endif
 350
 351 /* exchange_meta_data.c */
 352 OM_uint32 GSSAPI_CALLCONV
 353 gssEapExchangeMetaData(OM_uint32 *minor,
 354                        gss_const_OID mech,
 355                        gss_cred_id_t cred,
 356                        gss_ctx_id_t *ctx,
 357                        const gss_name_t name,
 358                        OM_uint32 req_flags,
 359                        gss_const_buffer_t meta_data);
 360
 361 /* export_sec_context.c */
 362 OM_uint32
 363 gssEapExportSecContext(OM_uint32 *minor,
 364                        gss_ctx_id_t ctx,
 365                        gss_buffer_t token);
 366
 367 /* import_sec_context.c */
 368 OM_uint32
 369 gssEapImportContext(OM_uint32 *minor,
 370                     gss_buffer_t token,
 371                     gss_ctx_id_t ctx);
 372
 373 /* inquire_sec_context_by_oid.c */
 374 #define NEGOEX_INITIATOR_SALT      "gss-eap-negoex-initiator"
 375 #define NEGOEX_INITIATOR_SALT_LEN  (sizeof(NEGOEX_INITIATOR_SALT) - 1)
 376
 377 #define NEGOEX_ACCEPTOR_SALT       "gss-eap-negoex-acceptor"
 378 #define NEGOEX_ACCEPTOR_SALT_LEN   (sizeof(NEGOEX_ACCEPTOR_SALT) - 1)
 379
 380 /* pseudo_random.c */
 381 OM_uint32
 382 gssEapPseudoRandom(OM_uint32 *minor,
 383                    gss_ctx_id_t ctx,
 384                    int prf_key,
 385                    const gss_buffer_t prf_in,
 386                    gss_buffer_t prf_out);
 387
 388 /* query_mechanism_info.c */
 389 OM_uint32
 390 gssQueryMechanismInfo(OM_uint32 *minor,
 391                       gss_const_OID mech_oid,
 392                       unsigned char auth_scheme[16]);
 393
 394 /* query_meta_data.c */
 395 OM_uint32
 396 gssEapQueryMetaData(OM_uint32 *minor,
 397                     gss_const_OID mech GSSEAP_UNUSED,
 398                     gss_cred_id_t cred,
 399                     gss_ctx_id_t *context_handle,
 400                     const gss_name_t name,
 401                     OM_uint32 req_flags GSSEAP_UNUSED,
 402                     gss_buffer_t meta_data);
 403
 404 /* eap_mech.c */
 405 OM_uint32
 406 gssEapInitiatorInit(OM_uint32 *minor);
 407
 408 void
 409 gssEapFinalize(void);
 410
 411   /* Debugging and tracing*/
 412   #define gssEapTrace(_fmt, ...) wpa_printf(MSG_INFO, _fmt, __VA_ARGS__);
 413
 414 void
 415 gssEapTraceStatus(const char *function, OM_uint32 major, OM_uint32 minor);
 416
 417
 418   /*If built as a library on Linux, don't respect environment when set*uid*/
 419 #ifdef HAVE_SECURE_GETENV
 420 #define getenv secure_getenv
 421 #endif
 422
 423 #ifdef __cplusplus
 424 }
 425 #endif
 426
 427 #endif /* _GSSAPIP_EAP_H_ */