util.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  * Portions Copyright 2003-2010 Massachusetts Institute of Technology.
  34  * All Rights Reserved.
  35  *
  36  * Export of this software from the United States of America may
  37  *   require a specific license from the United States Government.
  38  *   It is the responsibility of any person or organization contemplating
  39  *   export to obtain such a license before exporting.
  40  *
  41  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  42  * distribute this software and its documentation for any purpose and
  43  * without fee is hereby granted, provided that the above copyright
  44  * notice appear in all copies and that both that copyright notice and
  45  * this permission notice appear in supporting documentation, and that
  46  * the name of M.I.T. not be used in advertising or publicity pertaining
  47  * to distribution of the software without specific, written prior
  48  * permission.  Furthermore if you modify this software you must label
  49  * your software as modified software and not distribute it in such a
  50  * fashion that it might be confused with the original M.I.T. software.
  51  * M.I.T. makes no representations about the suitability of
  52  * this software for any purpose.  It is provided "as is" without express
  53  * or implied warranty.
  54  *
  55  */
  56
  57 /*
  58  * Utility functions.
  59  */
  60
  61 #ifndef _UTIL_H_
  62 #define _UTIL_H_ 1
  63
  64 #include <sys/param.h>
  65 #include <string.h>
  66 #include <errno.h>
  67
  68 #include <krb5.h>
  69
  70 #ifdef __cplusplus
  71 extern "C" {
  72 #endif
  73
  74 #ifndef MIN
  75 #define MIN(_a,_b)  ((_a)<(_b)?(_a):(_b))
  76 #endif
  77
  78 /* util_buffer.c */
  79 OM_uint32
  80 makeStringBuffer(OM_uint32 *minor,
  81                  const char *string,
  82                  gss_buffer_t buffer);
  83
  84 OM_uint32
  85 bufferToString(OM_uint32 *minor,
  86                const gss_buffer_t buffer,
  87                char **pString);
  88
  89 OM_uint32
  90 duplicateBuffer(OM_uint32 *minor,
  91                 const gss_buffer_t src,
  92                 gss_buffer_t dst);
  93
  94 static inline int
  95 bufferEqual(const gss_buffer_t b1, const gss_buffer_t b2)
  96 {
  97     return (b1->length == b2->length &&
  98             memcmp(b1->value, b2->value, b2->length) == 0);
  99 }
 100
 101 static inline int
 102 bufferEqualString(const gss_buffer_t b1, const char *s)
 103 {
 104     gss_buffer_desc b2;
 105
 106     b2.length = strlen(s);
 107     b2.value = (char *)s;
 108
 109     return bufferEqual(b1, &b2);
 110 }
 111
 112 /* util_cksum.c */
 113 int
 114 gssEapSign(krb5_context context,
 115            krb5_cksumtype type,
 116            size_t rrc,
 117 #ifdef HAVE_HEIMDAL_VERSION
 118            krb5_crypto crypto,
 119 #else
 120            krb5_keyblock *key,
 121 #endif
 122            krb5_keyusage sign_usage,
 123            gss_iov_buffer_desc *iov,
 124            int iov_count);
 125
 126 int
 127 gssEapVerify(krb5_context context,
 128              krb5_cksumtype type,
 129              size_t rrc,
 130 #ifdef HAVE_HEIMDAL_VERSION
 131              krb5_crypto crypto,
 132 #else
 133              krb5_keyblock *key,
 134 #endif
 135              krb5_keyusage sign_usage,
 136              gss_iov_buffer_desc *iov,
 137              int iov_count,
 138              int *valid);
 139
 140 #if 0
 141 OM_uint32
 142 gssEapEncodeGssChannelBindings(OM_uint32 *minor,
 143                                gss_channel_bindings_t chanBindings,
 144                                gss_buffer_t encodedBindings);
 145 #endif
 146
 147 /* util_context.c */
 148 #define EAP_EXPORT_CONTEXT_V1           1
 149
 150 enum gss_eap_token_type {
 151     TOK_TYPE_NONE                    = 0x0000,  /* no token */
 152     TOK_TYPE_MIC                     = 0x0404,  /* RFC 4121 MIC token */
 153     TOK_TYPE_WRAP                    = 0x0504,  /* RFC 4121 wrap token */
 154     TOK_TYPE_EXPORT_NAME             = 0x0401,  /* RFC 2743 exported name */
 155     TOK_TYPE_EXPORT_NAME_COMPOSITE   = 0x0402,  /* exported composite name */
 156     TOK_TYPE_DELETE_CONTEXT          = 0x0405,  /* RFC 2743 delete context */
 157     TOK_TYPE_EAP_RESP                = 0x0601,  /* EAP response */
 158     TOK_TYPE_EAP_REQ                 = 0x0602,  /* EAP request */
 159     TOK_TYPE_EXT_REQ                 = 0x0603,  /* GSS EAP extensions request */
 160     TOK_TYPE_EXT_RESP                = 0x0604,  /* GSS EAP extensions response */
 161     TOK_TYPE_GSS_REAUTH              = 0x0605,  /* GSS EAP fast reauthentication token */
 162     TOK_TYPE_CONTEXT_ERR             = 0x0606,  /* context error */
 163 };
 164
 165 OM_uint32 gssEapAllocContext(OM_uint32 *minor, gss_ctx_id_t *pCtx);
 166 OM_uint32 gssEapReleaseContext(OM_uint32 *minor, gss_ctx_id_t *pCtx);
 167
 168 OM_uint32
 169 gssEapMakeToken(OM_uint32 *minor,
 170                 gss_ctx_id_t ctx,
 171                 const gss_buffer_t innerToken,
 172                 enum gss_eap_token_type tokenType,
 173                 gss_buffer_t outputToken);
 174
 175 OM_uint32
 176 gssEapVerifyToken(OM_uint32 *minor,
 177                   gss_ctx_id_t ctx,
 178                   const gss_buffer_t inputToken,
 179                   enum gss_eap_token_type *tokenType,
 180                   gss_buffer_t innerInputToken);
 181
 182 OM_uint32
 183 gssEapContextTime(OM_uint32 *minor,
 184                   gss_ctx_id_t context_handle,
 185                   OM_uint32 *time_rec);
 186
 187 OM_uint32
 188 gssEapDisplayName(OM_uint32 *minor,
 189                   gss_name_t name,
 190                   gss_buffer_t output_name_buffer,
 191                   gss_OID *output_name_type);
 192
 193 /* util_cred.c */
 194 OM_uint32 gssEapAllocCred(OM_uint32 *minor, gss_cred_id_t *pCred);
 195 OM_uint32 gssEapReleaseCred(OM_uint32 *minor, gss_cred_id_t *pCred);
 196
 197 OM_uint32
 198 gssEapAcquireCred(OM_uint32 *minor,
 199                   const gss_name_t desiredName,
 200                   const gss_buffer_t password,
 201                   OM_uint32 timeReq,
 202                   const gss_OID_set desiredMechs,
 203                   int cred_usage,
 204                   gss_cred_id_t *pCred,
 205                   gss_OID_set *pActualMechs,
 206                   OM_uint32 *timeRec);
 207
 208 int gssEapCredAvailable(gss_cred_id_t cred, gss_OID mech);
 209
 210 /* util_crypt.c */
 211 int
 212 gssEapEncrypt(krb5_context context, int dce_style, size_t ec,
 213               size_t rrc,
 214 #ifdef HAVE_HEIMDAL_VERSION
 215               krb5_crypto crypto,
 216 #else
 217               krb5_keyblock *key,
 218 #endif
 219               int usage,
 220               gss_iov_buffer_desc *iov, int iov_count);
 221
 222 int
 223 gssEapDecrypt(krb5_context context, int dce_style, size_t ec,
 224               size_t rrc,
 225 #ifdef HAVE_HEIMDAL_VERSION
 226               krb5_crypto crypto,
 227 #else
 228               krb5_keyblock *key,
 229 #endif
 230               int usage,
 231               gss_iov_buffer_desc *iov, int iov_count);
 232
 233 int
 234 gssEapMapCryptoFlag(OM_uint32 type);
 235
 236 gss_iov_buffer_t
 237 gssEapLocateIov(gss_iov_buffer_desc *iov,
 238                 int iov_count,
 239                 OM_uint32 type);
 240
 241 void
 242 gssEapIovMessageLength(gss_iov_buffer_desc *iov,
 243                        int iov_count,
 244                        size_t *data_length,
 245                        size_t *assoc_data_length);
 246
 247 void
 248 gssEapReleaseIov(gss_iov_buffer_desc *iov, int iov_count);
 249
 250 int
 251 gssEapIsIntegrityOnly(gss_iov_buffer_desc *iov, int iov_count);
 252
 253 int
 254 gssEapAllocIov(gss_iov_buffer_t iov, size_t size);
 255
 256 OM_uint32
 257 gssEapDeriveRfc3961Key(OM_uint32 *minor,
 258                        const unsigned char *key,
 259                        size_t keyLength,
 260                        krb5_enctype enctype,
 261                        krb5_keyblock *pKey);
 262
 263 /* util_exts.c */
 264 #define EXT_FLAG_CRITICAL               0x80000000  /* critical, wire flag */
 265 #define EXT_FLAG_VERIFIED               0x40000000  /* verified, API flag */
 266
 267 #define EXT_TYPE_GSS_CHANNEL_BINDINGS   0x00000000
 268 #define EXT_TYPE_REAUTH_CREDS           0x00000001
 269 #define EXT_TYPE_MASK                   (~(EXT_FLAG_CRITICAL | EXT_FLAG_VERIFIED))
 270
 271 struct gss_eap_extension_provider {
 272     OM_uint32 type;
 273     int critical; /* client */
 274     int required; /* server */
 275     OM_uint32 (*make)(OM_uint32 *,
 276                       gss_cred_id_t,
 277                       gss_ctx_id_t,
 278                       gss_channel_bindings_t,
 279                       gss_buffer_t);
 280     OM_uint32 (*verify)(OM_uint32 *,
 281                         gss_cred_id_t,
 282                         gss_ctx_id_t,
 283                         gss_channel_bindings_t,
 284                         const gss_buffer_t);
 285 };
 286
 287 OM_uint32
 288 gssEapMakeExtensions(OM_uint32 *minor,
 289                      gss_cred_id_t cred,
 290                      gss_ctx_id_t ctx,
 291                      gss_channel_bindings_t chanBindings,
 292                      gss_buffer_t buffer);
 293
 294 OM_uint32
 295 gssEapVerifyExtensions(OM_uint32 *minor,
 296                        gss_cred_id_t cred,
 297                        gss_ctx_id_t ctx,
 298                        gss_channel_bindings_t chanBindings,
 299                        const gss_buffer_t buffer);
 300
 301 /* util_krb.c */
 302 #ifdef HAVE_HEIMDAL_VERSION
 303
 304 #define KRB_TIME_FOREVER        ((time_t)~0L)
 305
 306 #define KRB_KEY_TYPE(key)       ((key)->keytype)
 307 #define KRB_KEY_DATA(key)       ((key)->keyvalue.data)
 308 #define KRB_KEY_LENGTH(key)     ((key)->keyvalue.length)
 309
 310 #define KRB_PRINC_LENGTH(princ) ((princ)->name.name_string.len)
 311 #define KRB_PRINC_TYPE(princ)   ((princ)->name.name_type)
 312 #define KRB_PRINC_NAME(princ)   ((princ)->name.name_string.val)
 313 #define KRB_PRINC_REALM(princ)  ((princ)->realm)
 314
 315 #define KRB_KT_ENT_KEYBLOCK(e)  (&(e)->keyblock)
 316 #define KRB_KT_ENT_FREE(c, e)   krb5_kt_free_entry((c), (e))
 317
 318 #define KRB_CRYPTO_CONTEXT(ctx) (krbCrypto)
 319
 320 #else
 321
 322 #define KRB_TIME_FOREVER        KRB5_INT32_MAX
 323
 324 #define KRB_KEY_TYPE(key)       ((key)->enctype)
 325 #define KRB_KEY_DATA(key)       ((key)->contents)
 326 #define KRB_KEY_LENGTH(key)     ((key)->length)
 327
 328 #define KRB_PRINC_LENGTH(princ) (krb5_princ_size(NULL, (princ)))
 329 #define KRB_PRINC_TYPE(princ)   (krb5_princ_type(NULL, (princ)))
 330 #define KRB_PRINC_NAME(princ)   (krb5_princ_name(NULL, (princ)))
 331 #define KRB_PRINC_REALM(princ)  (krb5_princ_realm(NULL, (princ)))
 332
 333 #define KRB_KT_ENT_KEYBLOCK(e)  (&(e)->key)
 334 #define KRB_KT_ENT_FREE(c, e)   krb5_free_keytab_entry_contents((c), (e))
 335
 336 #define KRB_CRYPTO_CONTEXT(ctx) (&(ctx)->rfc3961Key)
 337
 338 #endif /* HAVE_HEIMDAL_VERSION */
 339
 340 #define KRB_KEY_INIT(key)       do {        \
 341         KRB_KEY_TYPE(key) = ENCTYPE_NULL;   \
 342         KRB_KEY_DATA(key) = NULL;           \
 343         KRB_KEY_LENGTH(key) = 0;            \
 344     } while (0)
 345
 346 #define GSSEAP_KRB_INIT(ctx) do {                   \
 347         OM_uint32 tmpMajor;                         \
 348                                                     \
 349         tmpMajor  = gssEapKerberosInit(minor, ctx); \
 350         if (GSS_ERROR(tmpMajor)) {                  \
 351             return tmpMajor;                        \
 352         }                                           \
 353     } while (0)
 354
 355 OM_uint32
 356 gssEapKerberosInit(OM_uint32 *minor, krb5_context *context);
 357
 358 OM_uint32
 359 rfc3961ChecksumTypeForKey(OM_uint32 *minor,
 360                           krb5_keyblock *key,
 361                           krb5_cksumtype *cksumtype);
 362
 363 krb5_const_principal
 364 krbAnonymousPrincipal(void);
 365
 366 krb5_error_code
 367 krbCryptoLength(krb5_context krbContext,
 368 #ifdef HAVE_HEIMDAL_VERSION
 369                 krb5_crypto krbCrypto,
 370 #else
 371                 krb5_keyblock *key,
 372 #endif
 373                 int type,
 374                 size_t *length);
 375
 376 krb5_error_code
 377 krbPaddingLength(krb5_context krbContext,
 378 #ifdef HAVE_HEIMDAL_VERSION
 379                  krb5_crypto krbCrypto,
 380 #else
 381                  krb5_keyblock *key,
 382 #endif
 383                  size_t dataLength,
 384                  size_t *padLength);
 385
 386 krb5_error_code
 387 krbBlockSize(krb5_context krbContext,
 388 #ifdef HAVE_HEIMDAL_VERSION
 389                  krb5_crypto krbCrypto,
 390 #else
 391                  krb5_keyblock *key,
 392 #endif
 393                  size_t *blockSize);
 394
 395 krb5_error_code
 396 krbEnctypeToString(krb5_context krbContext,
 397                    krb5_enctype enctype,
 398                    const char *prefix,
 399                    gss_buffer_t string);
 400
 401 krb5_error_code
 402 krbMakeAuthDataKdcIssued(krb5_context context,
 403                          const krb5_keyblock *key,
 404                          krb5_const_principal issuer,
 405 #ifdef HAVE_HEIMDAL_VERSION
 406                          const AuthorizationData *authdata,
 407                          AuthorizationData *adKdcIssued
 408 #else
 409                          krb5_authdata *const *authdata,
 410                          krb5_authdata ***adKdcIssued
 411 #endif
 412                          );
 413
 414 krb5_error_code
 415 krbMakeCred(krb5_context context,
 416             krb5_auth_context authcontext,
 417             krb5_creds *creds,
 418             krb5_data *data);
 419
 420 /* util_lucid.c */
 421 OM_uint32
 422 gssEapExportLucidSecContext(OM_uint32 *minor,
 423                             gss_ctx_id_t ctx,
 424                             const gss_OID desiredObject,
 425                             gss_buffer_set_t *data_set);
 426
 427 /* util_mech.c */
 428 extern gss_OID GSS_EAP_MECHANISM;
 429
 430 int
 431 gssEapInternalizeOid(const gss_OID oid,
 432                      gss_OID *const pInternalizedOid);
 433
 434 OM_uint32
 435 gssEapReleaseOid(OM_uint32 *minor, gss_OID *oid);
 436
 437 OM_uint32
 438 gssEapDefaultMech(OM_uint32 *minor,
 439                   gss_OID *oid);
 440
 441 OM_uint32
 442 gssEapIndicateMechs(OM_uint32 *minor,
 443                     gss_OID_set *mechs);
 444
 445 OM_uint32
 446 gssEapEnctypeToOid(OM_uint32 *minor,
 447                    krb5_enctype enctype,
 448                    gss_OID *pOid);
 449
 450 OM_uint32
 451 gssEapOidToEnctype(OM_uint32 *minor,
 452                    const gss_OID oid,
 453                    krb5_enctype *enctype);
 454
 455 int
 456 gssEapIsMechanismOid(const gss_OID oid);
 457
 458 int
 459 gssEapIsConcreteMechanismOid(const gss_OID oid);
 460
 461 OM_uint32
 462 gssEapValidateMechs(OM_uint32 *minor,
 463                    const gss_OID_set mechs);
 464
 465 gss_buffer_t
 466 gssEapOidToSaslName(const gss_OID oid);
 467
 468 gss_OID
 469 gssEapSaslNameToOid(const gss_buffer_t name);
 470
 471 /* util_name.c */
 472 #define EXPORT_NAME_FLAG_OID        0x1
 473 #define EXPORT_NAME_FLAG_COMPOSITE  0x2
 474
 475 OM_uint32 gssEapAllocName(OM_uint32 *minor, gss_name_t *pName);
 476 OM_uint32 gssEapReleaseName(OM_uint32 *minor, gss_name_t *pName);
 477 OM_uint32 gssEapExportName(OM_uint32 *minor,
 478                            const gss_name_t name,
 479                            gss_buffer_t exportedName);
 480 OM_uint32 gssEapExportNameInternal(OM_uint32 *minor,
 481                                    const gss_name_t name,
 482                                    gss_buffer_t exportedName,
 483                                    unsigned int flags);
 484 OM_uint32 gssEapImportName(OM_uint32 *minor,
 485                            const gss_buffer_t input_name_buffer,
 486                            gss_OID input_name_type,
 487                            gss_name_t *output_name);
 488 OM_uint32 gssEapImportNameInternal(OM_uint32 *minor,
 489                                    const gss_buffer_t input_name_buffer,
 490                                    gss_name_t *output_name,
 491                                    unsigned int flags);
 492 OM_uint32
 493 gssEapDuplicateName(OM_uint32 *minor,
 494                     const gss_name_t input_name,
 495                     gss_name_t *dest_name);
 496
 497 /* util_oid.c */
 498 OM_uint32
 499 composeOid(OM_uint32 *minor_status,
 500            const char *prefix,
 501            size_t prefix_len,
 502            int suffix,
 503            gss_OID_desc *oid);
 504
 505 OM_uint32
 506 decomposeOid(OM_uint32 *minor_status,
 507              const char *prefix,
 508              size_t prefix_len,
 509              gss_OID_desc *oid,
 510              int *suffix) ;
 511
 512 OM_uint32
 513 duplicateOid(OM_uint32 *minor_status,
 514              const gss_OID_desc * const oid,
 515              gss_OID *new_oid);
 516
 517 OM_uint32
 518 duplicateOidSet(OM_uint32 *minor,
 519                 const gss_OID_set src,
 520                 gss_OID_set *dst);
 521
 522 static inline int
 523 oidEqual(const gss_OID_desc *o1, const gss_OID_desc *o2)
 524 {
 525     if (o1 == GSS_C_NO_OID)
 526         return (o2 == GSS_C_NO_OID);
 527     else if (o2 == GSS_C_NO_OID)
 528         return (o1 == GSS_C_NO_OID);
 529     else
 530         return (o1->length == o2->length &&
 531                 memcmp(o1->elements, o2->elements, o1->length) == 0);
 532 }
 533
 534 /* util_ordering.c */
 535 OM_uint32
 536 sequenceInternalize(OM_uint32 *minor,
 537                     void **vqueue,
 538                     unsigned char **buf,
 539                     size_t *lenremain);
 540
 541 OM_uint32
 542 sequenceExternalize(OM_uint32 *minor,
 543                     void *vqueue,
 544                     unsigned char **buf,
 545                     size_t *lenremain);
 546
 547 size_t
 548 sequenceSize(void *vqueue);
 549
 550 OM_uint32
 551 sequenceFree(OM_uint32 *minor, void **vqueue);
 552
 553 OM_uint32
 554 sequenceCheck(OM_uint32 *minor, void **vqueue, uint64_t seqnum);
 555
 556 OM_uint32
 557 sequenceInit(OM_uint32 *minor, void **vqueue, uint64_t seqnum,
 558              int do_replay, int do_sequence, int wide_nums);
 559
 560 /* util_token.c */
 561 size_t
 562 tokenSize(const gss_OID_desc *mech, size_t body_size);
 563
 564 void
 565 makeTokenHeader(const gss_OID_desc *mech,
 566                 size_t body_size,
 567                 unsigned char **buf,
 568                 enum gss_eap_token_type tok_type);
 569
 570 OM_uint32
 571 verifyTokenHeader(OM_uint32 *minor,
 572                   gss_OID mech,
 573                   size_t *body_size,
 574                   unsigned char **buf_in,
 575                   size_t toksize_in,
 576                   enum gss_eap_token_type *ret_tok_type);
 577
 578 /* Helper macros */
 579
 580 #define GSSEAP_CALLOC                   calloc
 581 #define GSSEAP_MALLOC                   malloc
 582 #define GSSEAP_FREE                     free
 583 #define GSSEAP_REALLOC                  realloc
 584
 585 #define GSSEAP_NOT_IMPLEMENTED          do {            \
 586         assert(0 && "not implemented");                 \
 587         *minor = ENOSYS;                                \
 588         return GSS_S_FAILURE;                           \
 589     } while (0)
 590
 591 #include <pthread.h>
 592
 593 #define GSSEAP_MUTEX                    pthread_mutex_t
 594 #define GSSEAP_MUTEX_INITIALIZER        PTHREAD_MUTEX_INITIALIZER
 595
 596 #define GSSEAP_MUTEX_INIT(m)            pthread_mutex_init((m), NULL)
 597 #define GSSEAP_MUTEX_DESTROY(m)         pthread_mutex_destroy((m))
 598 #define GSSEAP_MUTEX_LOCK(m)            pthread_mutex_lock((m))
 599 #define GSSEAP_MUTEX_UNLOCK(m)          pthread_mutex_unlock((m))
 600
 601 #define GSSEAP_THREAD_KEY               pthread_key_t
 602 #define GSSEAP_KEY_CREATE(k, d)         pthread_key_create((k), (d))
 603 #define GSSEAP_GETSPECIFIC(k)           pthread_getspecific((k))
 604 #define GSSEAP_SETSPECIFIC(k, d)        pthread_setspecific((k), (d))
 605
 606 #define GSSEAP_THREAD_ONCE              pthread_once_t
 607 #define GSSEAP_ONCE(o, i)               pthread_once((o), (i))
 608 #define GSSEAP_ONCE_INITIALIZER         PTHREAD_ONCE_INIT
 609
 610 /* Helper functions */
 611 static inline void
 612 store_uint16_be(uint16_t val, void *vp)
 613 {
 614     unsigned char *p = (unsigned char *)vp;
 615
 616     p[0] = (val >>  8) & 0xff;
 617     p[1] = (val      ) & 0xff;
 618 }
 619
 620 static inline uint16_t
 621 load_uint16_be(const void *cvp)
 622 {
 623     const unsigned char *p = (const unsigned char *)cvp;
 624
 625     return (p[1] | (p[0] << 8));
 626 }
 627
 628 static inline void
 629 store_uint32_be(uint32_t val, void *vp)
 630 {
 631     unsigned char *p = (unsigned char *)vp;
 632
 633     p[0] = (val >> 24) & 0xff;
 634     p[1] = (val >> 16) & 0xff;
 635     p[2] = (val >>  8) & 0xff;
 636     p[3] = (val      ) & 0xff;
 637 }
 638
 639 static inline uint32_t
 640 load_uint32_be(const void *cvp)
 641 {
 642     const unsigned char *p = (const unsigned char *)cvp;
 643
 644     return (p[3] | (p[2] << 8)
 645             | ((uint32_t) p[1] << 16)
 646             | ((uint32_t) p[0] << 24));
 647 }
 648
 649 static inline void
 650 store_uint64_be(uint64_t val, void *vp)
 651 {
 652     unsigned char *p = (unsigned char *)vp;
 653
 654     p[0] = (unsigned char)((val >> 56) & 0xff);
 655     p[1] = (unsigned char)((val >> 48) & 0xff);
 656     p[2] = (unsigned char)((val >> 40) & 0xff);
 657     p[3] = (unsigned char)((val >> 32) & 0xff);
 658     p[4] = (unsigned char)((val >> 24) & 0xff);
 659     p[5] = (unsigned char)((val >> 16) & 0xff);
 660     p[6] = (unsigned char)((val >>  8) & 0xff);
 661     p[7] = (unsigned char)((val      ) & 0xff);
 662 }
 663
 664 static inline uint64_t
 665 load_uint64_be(const void *cvp)
 666 {
 667     const unsigned char *p = (const unsigned char *)cvp;
 668
 669     return ((uint64_t)load_uint32_be(p) << 32) | load_uint32_be(p + 4);
 670 }
 671
 672 static inline unsigned char *
 673 store_buffer(gss_buffer_t buffer, void *vp, int wide_nums)
 674 {
 675     unsigned char *p = (unsigned char *)vp;
 676
 677     if (wide_nums) {
 678         store_uint64_be(buffer->length, p);
 679         p += 8;
 680     } else {
 681         store_uint32_be(buffer->length, p);
 682         p += 4;
 683     }
 684
 685     if (buffer->value != NULL) {
 686         memcpy(p, buffer->value, buffer->length);
 687         p += buffer->length;
 688     }
 689
 690     return p;
 691 }
 692
 693 static inline unsigned char *
 694 load_buffer(const void *cvp, size_t length, gss_buffer_t buffer)
 695 {
 696     buffer->length = 0;
 697     buffer->value = GSSEAP_MALLOC(length);
 698     if (buffer->value == NULL)
 699         return NULL;
 700     buffer->length = length;
 701     memcpy(buffer->value, cvp, length);
 702     return (unsigned char *)cvp + length;
 703 }
 704
 705 static inline unsigned char *
 706 store_oid(gss_OID oid, void *vp)
 707 {
 708     gss_buffer_desc buf;
 709
 710     if (oid != GSS_C_NO_OID) {
 711         buf.length = oid->length;
 712         buf.value = oid->elements;
 713     } else {
 714         buf.length = 0;
 715         buf.value = NULL;
 716     }
 717
 718     return store_buffer(&buf, vp, FALSE);
 719 }
 720
 721 static inline void
 722 krbDataToGssBuffer(krb5_data *data, gss_buffer_t buffer)
 723 {
 724     buffer->value = (void *)data->data;
 725     buffer->length = data->length;
 726 }
 727
 728 static inline void
 729 krbPrincComponentToGssBuffer(krb5_principal krbPrinc,
 730                              int index, gss_buffer_t buffer)
 731 {
 732 #ifdef HAVE_HEIMDAL_VERSION
 733     buffer->value = (void *)KRB_PRINC_NAME(krbPrinc)[index];
 734     buffer->length = strlen((char *)buffer->value);
 735 #else
 736     buffer->value = (void *)krb5_princ_component(NULL, krbPrinc, index)->data;
 737     buffer->length = krb5_princ_component(NULL, krbPrinc, index)->length;
 738 #endif /* HAVE_HEIMDAL_VERSION */
 739 }
 740
 741 static inline void
 742 krbPrincRealmToGssBuffer(krb5_principal krbPrinc, gss_buffer_t buffer)
 743 {
 744 #ifdef HAVE_HEIMDAL_VERSION
 745     buffer->value = (void *)KRB_PRINC_REALM(krbPrinc);
 746     buffer->length = strlen((char *)buffer->value);
 747 #else
 748     krbDataToGssBuffer(KRB_PRINC_REALM(krbPrinc), buffer);
 749 #endif
 750 }
 751
 752 static inline void
 753 gssBufferToKrbData(gss_buffer_t buffer, krb5_data *data)
 754 {
 755     data->data = (char *)buffer->value;
 756     data->length = buffer->length;
 757 }
 758
 759 #ifdef __cplusplus
 760 }
 761 #endif
 762
 763 #include "util_attr.h"
 764 #ifdef GSSEAP_ENABLE_REAUTH
 765 #include "util_reauth.h"
 766 #endif
 767
 768 #endif /* _UTIL_H_ */