www.project-moonshot.org Git - mech_eap.orig/blob - util.h

   1 /*
   2  * Copyright (c) 2010, 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 #define KRB_KEY_TYPE(key)       ((key)->keytype)
 304 #define KRB_KEY_DATA(key)       ((key)->keyvalue.data)
 305 #define KRB_KEY_LENGTH(key)     ((key)->keyvalue.length)
 306 #else
 307 #define KRB_KEY_TYPE(key)       ((key)->enctype)
 308 #define KRB_KEY_DATA(key)       ((key)->contents)
 309 #define KRB_KEY_LENGTH(key)     ((key)->length)
 310 #endif /* HAVE_HEIMDAL_VERSION */
 311
 312 #define KRB_KEY_INIT(key)       do {        \
 313         KRB_KEY_TYPE(key) = ENCTYPE_NULL;   \
 314         KRB_KEY_DATA(key) = NULL;           \
 315         KRB_KEY_LENGTH(key) = 0;            \
 316     } while (0)
 317
 318 #ifdef HAVE_HEIMDAL_VERSION
 319 #define KRB_PRINC_LENGTH(princ) ((princ)->name.name_string.len)
 320 #define KRB_PRINC_TYPE(princ)   ((princ)->name.name_type)
 321 #define KRB_PRINC_NAME(princ)   ((princ)->name.name_string.val)
 322 #define KRB_CRYPTO_CONTEXT(ctx) (krbCrypto)
 323 #else
 324 #define KRB_PRINC_LENGTH(princ) (krb5_princ_size(NULL, (princ)))
 325 #define KRB_PRINC_TYPE(princ)   (krb5_princ_type(NULL, (princ)))
 326 #define KRB_PRINC_NAME(princ)   (krb5_princ_name(NULL, (princ)))
 327 #define KRB_CRYPTO_CONTEXT(ctx) (&(ctx)->rfc3961Key)
 328 #endif /* HAVE_HEIMDAL_VERSION */
 329
 330 #ifdef HAVE_HEIMDAL_VERSION
 331 #define GSS_IOV_BUFFER_FLAG_ALLOCATE    GSS_IOV_BUFFER_TYPE_FLAG_ALLOCATE
 332 #define GSS_IOV_BUFFER_FLAG_ALLOCATED   GSS_IOV_BUFFER_TYPE_FLAG_ALLOCATED
 333
 334 #define GSS_S_CRED_UNAVAIL              GSS_S_FAILURE
 335 #endif
 336
 337 #define GSSEAP_KRB_INIT(ctx) do {                   \
 338         OM_uint32 tmpMajor;                         \
 339                                                     \
 340         tmpMajor  = gssEapKerberosInit(minor, ctx); \
 341         if (GSS_ERROR(tmpMajor)) {                  \
 342             return tmpMajor;                        \
 343         }                                           \
 344     } while (0)
 345
 346 OM_uint32
 347 gssEapKerberosInit(OM_uint32 *minor, krb5_context *context);
 348
 349 OM_uint32
 350 rfc3961ChecksumTypeForKey(OM_uint32 *minor,
 351                           krb5_keyblock *key,
 352                           krb5_cksumtype *cksumtype);
 353
 354 krb5_const_principal
 355 krbAnonymousPrincipal(void);
 356
 357 krb5_error_code
 358 krbCryptoLength(krb5_context krbContext,
 359 #ifdef HAVE_HEIMDAL_VERSION
 360                 krb5_crypto krbCrypto,
 361 #else
 362                 krb5_keyblock *key,
 363 #endif
 364                 int type,
 365                 size_t *length);
 366
 367 krb5_error_code
 368 krbPaddingLength(krb5_context krbContext,
 369 #ifdef HAVE_HEIMDAL_VERSION
 370                  krb5_crypto krbCrypto,
 371 #else
 372                  krb5_keyblock *key,
 373 #endif
 374                  size_t dataLength,
 375                  size_t *padLength);
 376
 377 krb5_error_code
 378 krbBlockSize(krb5_context krbContext,
 379 #ifdef HAVE_HEIMDAL_VERSION
 380                  krb5_crypto krbCrypto,
 381 #else
 382                  krb5_keyblock *key,
 383 #endif
 384                  size_t *blockSize);
 385
 386 krb5_error_code
 387 krbEnctypeToString(krb5_context krbContext,
 388                    krb5_enctype enctype,
 389                    const char *prefix,
 390                    gss_buffer_t string);
 391
 392 /* util_lucid.c */
 393 OM_uint32
 394 gssEapExportLucidSecContext(OM_uint32 *minor,
 395                             gss_ctx_id_t ctx,
 396                             const gss_OID desiredObject,
 397                             gss_buffer_set_t *data_set);
 398
 399 /* util_mech.c */
 400 extern gss_OID GSS_EAP_MECHANISM;
 401
 402 int
 403 gssEapInternalizeOid(const gss_OID oid,
 404                      gss_OID *const pInternalizedOid);
 405
 406 OM_uint32
 407 gssEapDefaultMech(OM_uint32 *minor,
 408                   gss_OID *oid);
 409
 410 OM_uint32
 411 gssEapIndicateMechs(OM_uint32 *minor,
 412                     gss_OID_set *mechs);
 413
 414 OM_uint32
 415 gssEapEnctypeToOid(OM_uint32 *minor,
 416                    krb5_enctype enctype,
 417                    gss_OID *pOid);
 418
 419 OM_uint32
 420 gssEapOidToEnctype(OM_uint32 *minor,
 421                    const gss_OID oid,
 422                    krb5_enctype *enctype);
 423
 424 int
 425 gssEapIsMechanismOid(const gss_OID oid);
 426
 427 int
 428 gssEapIsConcreteMechanismOid(const gss_OID oid);
 429
 430 OM_uint32
 431 gssEapValidateMechs(OM_uint32 *minor,
 432                    const gss_OID_set mechs);
 433
 434 gss_buffer_t
 435 gssEapOidToSaslName(const gss_OID oid);
 436
 437 gss_OID
 438 gssEapSaslNameToOid(const gss_buffer_t name);
 439
 440 /* util_name.c */
 441 #define EXPORT_NAME_FLAG_OID        0x1
 442 #define EXPORT_NAME_FLAG_COMPOSITE  0x2
 443
 444 OM_uint32 gssEapAllocName(OM_uint32 *minor, gss_name_t *pName);
 445 OM_uint32 gssEapReleaseName(OM_uint32 *minor, gss_name_t *pName);
 446 OM_uint32 gssEapExportName(OM_uint32 *minor,
 447                            const gss_name_t name,
 448                            gss_buffer_t exportedName);
 449 OM_uint32 gssEapExportNameInternal(OM_uint32 *minor,
 450                                    const gss_name_t name,
 451                                    gss_buffer_t exportedName,
 452                                    unsigned int flags);
 453 OM_uint32 gssEapImportName(OM_uint32 *minor,
 454                            const gss_buffer_t input_name_buffer,
 455                            gss_OID input_name_type,
 456                            gss_name_t *output_name);
 457 OM_uint32 gssEapImportNameInternal(OM_uint32 *minor,
 458                                    const gss_buffer_t input_name_buffer,
 459                                    gss_name_t *output_name,
 460                                    unsigned int flags);
 461 OM_uint32
 462 gssEapDuplicateName(OM_uint32 *minor,
 463                     const gss_name_t input_name,
 464                     gss_name_t *dest_name);
 465
 466 /* util_oid.c */
 467 OM_uint32
 468 composeOid(OM_uint32 *minor_status,
 469            const char *prefix,
 470            size_t prefix_len,
 471            int suffix,
 472            gss_OID_desc *oid);
 473
 474 OM_uint32
 475 decomposeOid(OM_uint32 *minor_status,
 476              const char *prefix,
 477              size_t prefix_len,
 478              gss_OID_desc *oid,
 479              int *suffix) ;
 480
 481 OM_uint32
 482 duplicateOid(OM_uint32 *minor_status,
 483              const gss_OID_desc * const oid,
 484              gss_OID *new_oid);
 485
 486 OM_uint32
 487 duplicateOidSet(OM_uint32 *minor,
 488                 const gss_OID_set src,
 489                 gss_OID_set *dst);
 490
 491 static inline int
 492 oidEqual(const gss_OID_desc *o1, const gss_OID_desc *o2)
 493 {
 494     if (o1 == GSS_C_NO_OID)
 495         return (o2 == GSS_C_NO_OID);
 496     else if (o2 == GSS_C_NO_OID)
 497         return (o1 == GSS_C_NO_OID);
 498     else
 499         return (o1->length == o2->length &&
 500                 memcmp(o1->elements, o2->elements, o1->length) == 0);
 501 }
 502
 503 /* util_ordering.c */
 504 OM_uint32
 505 sequenceInternalize(OM_uint32 *minor,
 506                     void **vqueue,
 507                     unsigned char **buf,
 508                     size_t *lenremain);
 509
 510 OM_uint32
 511 sequenceExternalize(OM_uint32 *minor,
 512                     void *vqueue,
 513                     unsigned char **buf,
 514                     size_t *lenremain);
 515
 516 size_t
 517 sequenceSize(void *vqueue);
 518
 519 OM_uint32
 520 sequenceFree(OM_uint32 *minor, void **vqueue);
 521
 522 OM_uint32
 523 sequenceCheck(OM_uint32 *minor, void **vqueue, uint64_t seqnum);
 524
 525 OM_uint32
 526 sequenceInit(OM_uint32 *minor, void **vqueue, uint64_t seqnum,
 527              int do_replay, int do_sequence, int wide_nums);
 528
 529 /* util_token.c */
 530 size_t
 531 tokenSize(const gss_OID_desc *mech, size_t body_size);
 532
 533 void
 534 makeTokenHeader(const gss_OID_desc *mech,
 535                 size_t body_size,
 536                 unsigned char **buf,
 537                 enum gss_eap_token_type tok_type);
 538
 539 OM_uint32
 540 verifyTokenHeader(OM_uint32 *minor,
 541                   gss_OID mech,
 542                   size_t *body_size,
 543                   unsigned char **buf_in,
 544                   size_t toksize_in,
 545                   enum gss_eap_token_type *ret_tok_type);
 546
 547 /* Helper macros */
 548
 549 #define GSSEAP_CALLOC                   calloc
 550 #define GSSEAP_MALLOC                   malloc
 551 #define GSSEAP_FREE                     free
 552 #define GSSEAP_REALLOC                  realloc
 553
 554 #define GSSEAP_NOT_IMPLEMENTED          do {            \
 555         assert(0 && "not implemented");                 \
 556         *minor = ENOSYS;                                \
 557         return GSS_S_FAILURE;                           \
 558     } while (0)
 559
 560 #include <pthread.h>
 561
 562 #define GSSEAP_MUTEX                    pthread_mutex_t
 563 #define GSSEAP_MUTEX_INITIALIZER        PTHREAD_MUTEX_INITIALIZER
 564
 565 #define GSSEAP_MUTEX_INIT(m)            pthread_mutex_init((m), NULL)
 566 #define GSSEAP_MUTEX_DESTROY(m)         pthread_mutex_destroy((m))
 567 #define GSSEAP_MUTEX_LOCK(m)            pthread_mutex_lock((m))
 568 #define GSSEAP_MUTEX_UNLOCK(m)          pthread_mutex_unlock((m))
 569
 570 #define GSSEAP_THREAD_KEY               pthread_key_t
 571 #define GSSEAP_KEY_CREATE(k, d)         pthread_key_create((k), (d))
 572 #define GSSEAP_GETSPECIFIC(k)           pthread_getspecific((k))
 573 #define GSSEAP_SETSPECIFIC(k, d)        pthread_setspecific((k), (d))
 574
 575 #define GSSEAP_THREAD_ONCE              pthread_once_t
 576 #define GSSEAP_ONCE(o, i)               pthread_once((o), (i))
 577 #define GSSEAP_ONCE_INITIALIZER         PTHREAD_ONCE_INIT
 578
 579 /* Helper functions */
 580 static inline void
 581 store_uint16_be(uint16_t val, void *vp)
 582 {
 583     unsigned char *p = (unsigned char *)vp;
 584
 585     p[0] = (val >>  8) & 0xff;
 586     p[1] = (val      ) & 0xff;
 587 }
 588
 589 static inline uint16_t
 590 load_uint16_be(const void *cvp)
 591 {
 592     const unsigned char *p = (const unsigned char *)cvp;
 593
 594     return (p[1] | (p[0] << 8));
 595 }
 596
 597 static inline void
 598 store_uint32_be(uint32_t val, void *vp)
 599 {
 600     unsigned char *p = (unsigned char *)vp;
 601
 602     p[0] = (val >> 24) & 0xff;
 603     p[1] = (val >> 16) & 0xff;
 604     p[2] = (val >>  8) & 0xff;
 605     p[3] = (val      ) & 0xff;
 606 }
 607
 608 static inline uint32_t
 609 load_uint32_be(const void *cvp)
 610 {
 611     const unsigned char *p = (const unsigned char *)cvp;
 612
 613     return (p[3] | (p[2] << 8)
 614             | ((uint32_t) p[1] << 16)
 615             | ((uint32_t) p[0] << 24));
 616 }
 617
 618 static inline void
 619 store_uint64_be(uint64_t val, void *vp)
 620 {
 621     unsigned char *p = (unsigned char *)vp;
 622
 623     p[0] = (unsigned char)((val >> 56) & 0xff);
 624     p[1] = (unsigned char)((val >> 48) & 0xff);
 625     p[2] = (unsigned char)((val >> 40) & 0xff);
 626     p[3] = (unsigned char)((val >> 32) & 0xff);
 627     p[4] = (unsigned char)((val >> 24) & 0xff);
 628     p[5] = (unsigned char)((val >> 16) & 0xff);
 629     p[6] = (unsigned char)((val >>  8) & 0xff);
 630     p[7] = (unsigned char)((val      ) & 0xff);
 631 }
 632
 633 static inline uint64_t
 634 load_uint64_be(const void *cvp)
 635 {
 636     const unsigned char *p = (const unsigned char *)cvp;
 637
 638     return ((uint64_t)load_uint32_be(p) << 32) | load_uint32_be(p + 4);
 639 }
 640
 641 static inline unsigned char *
 642 store_buffer(gss_buffer_t buffer, void *vp, int wide_nums)
 643 {
 644     unsigned char *p = (unsigned char *)vp;
 645
 646     if (wide_nums) {
 647         store_uint64_be(buffer->length, p);
 648         p += 8;
 649     } else {
 650         store_uint32_be(buffer->length, p);
 651         p += 4;
 652     }
 653
 654     if (buffer->value != NULL) {
 655         memcpy(p, buffer->value, buffer->length);
 656         p += buffer->length;
 657     }
 658
 659     return p;
 660 }
 661
 662 static inline unsigned char *
 663 load_buffer(const void *cvp, size_t length, gss_buffer_t buffer)
 664 {
 665     buffer->length = 0;
 666     buffer->value = GSSEAP_MALLOC(length);
 667     if (buffer->value == NULL)
 668         return NULL;
 669     buffer->length = length;
 670     memcpy(buffer->value, cvp, length);
 671     return (unsigned char *)cvp + length;
 672 }
 673
 674 static inline unsigned char *
 675 store_oid(gss_OID oid, void *vp)
 676 {
 677     gss_buffer_desc buf;
 678
 679     if (oid != GSS_C_NO_OID) {
 680         buf.length = oid->length;
 681         buf.value = oid->elements;
 682     } else {
 683         buf.length = 0;
 684         buf.value = NULL;
 685     }
 686
 687     return store_buffer(&buf, vp, FALSE);
 688 }
 689
 690 static inline void
 691 krbDataToGssBuffer(krb5_data *data, gss_buffer_t buffer)
 692 {
 693     buffer->value = (void *)data->data;
 694     buffer->length = data->length;
 695 }
 696
 697 static inline void
 698 krbPrincComponentToGssBuffer(krb5_principal krbPrinc,
 699                              int index, gss_buffer_t buffer)
 700 {
 701 #ifdef HAVE_HEIMDAL_VERSION
 702     buffer->value = (void *)krbPrinc->name.name_string.val[index];
 703     buffer->length = strlen((char *)buffer->value);
 704 #else
 705     buffer->value = (void *)krb5_princ_component(NULL, krbPrinc, index)->data;
 706     buffer->length = krb5_princ_component(NULL, krbPrinc, index)->length;
 707 #endif /* HAVE_HEIMDAL_VERSION */
 708 }
 709
 710 static inline void
 711 krbPrincRealmToGssBuffer(krb5_principal krbPrinc, gss_buffer_t buffer)
 712 {
 713 #ifdef HAVE_HEIMDAL_VERSION
 714     buffer->value = (void *)krbPrinc->realm;
 715     buffer->length = strlen(krbPrinc->realm);
 716 #else
 717     krbDataToGssBuffer(krb5_princ_realm(NULL, krbPrinc), buffer);
 718 #endif
 719 }
 720
 721 static inline void
 722 gssBufferToKrbData(gss_buffer_t buffer, krb5_data *data)
 723 {
 724     data->data = (char *)buffer->value;
 725     data->length = buffer->length;
 726 }
 727
 728 #ifdef __cplusplus
 729 }
 730 #endif
 731
 732 #include "util_attr.h"
 733 #ifdef GSSEAP_ENABLE_REAUTH
 734 #include "util_reauth.h"
 735 #endif
 736
 737 #endif /* _UTIL_H_ */