dlls/secur32/schannel.c

   1 /* Copyright (C) 2005 Juan Lang
   2  * Copyright 2008 Henri Verbeet
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  * This file implements the schannel provider, or, the SSL/TLS implementations.
  19  * FIXME: It should be rather obvious that this file is empty of any
  20  * implementation.
  21  */
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdarg.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #ifdef SONAME_LIBGNUTLS
  29 #include <gnutls/gnutls.h>
  30 #endif
  31
  32 #include "windef.h"
  33 #include "winbase.h"
  34 #include "winnls.h"
  35 #include "sspi.h"
  36 #include "schannel.h"
  37 #include "secur32_priv.h"
  38 #include "wine/debug.h"
  39 #include "wine/library.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(secur32);
  42
  43 #ifdef SONAME_LIBGNUTLS
  44
  45 static void *libgnutls_handle;
  46 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  47 MAKE_FUNCPTR(gnutls_alert_get);
  48 MAKE_FUNCPTR(gnutls_alert_get_name);
  49 MAKE_FUNCPTR(gnutls_certificate_allocate_credentials);
  50 MAKE_FUNCPTR(gnutls_certificate_free_credentials);
  51 MAKE_FUNCPTR(gnutls_cipher_get);
  52 MAKE_FUNCPTR(gnutls_credentials_set);
  53 MAKE_FUNCPTR(gnutls_deinit);
  54 MAKE_FUNCPTR(gnutls_global_deinit);
  55 MAKE_FUNCPTR(gnutls_global_init);
  56 MAKE_FUNCPTR(gnutls_global_set_log_function);
  57 MAKE_FUNCPTR(gnutls_global_set_log_level);
  58 MAKE_FUNCPTR(gnutls_handshake);
  59 MAKE_FUNCPTR(gnutls_init);
  60 MAKE_FUNCPTR(gnutls_mac_get);
  61 MAKE_FUNCPTR(gnutls_mac_get_key_size);
  62 MAKE_FUNCPTR(gnutls_perror);
  63 MAKE_FUNCPTR(gnutls_set_default_priority);
  64 MAKE_FUNCPTR(gnutls_record_recv);
  65 MAKE_FUNCPTR(gnutls_record_send);
  66 MAKE_FUNCPTR(gnutls_transport_set_errno);
  67 MAKE_FUNCPTR(gnutls_transport_set_ptr);
  68 MAKE_FUNCPTR(gnutls_transport_set_pull_function);
  69 MAKE_FUNCPTR(gnutls_transport_set_push_function);
  70 #undef MAKE_FUNCPTR
  71
  72 #define SCHAN_INVALID_HANDLE ~0UL
  73
  74 enum schan_handle_type
  75 {
  76     SCHAN_HANDLE_CRED,
  77     SCHAN_HANDLE_CTX,
  78     SCHAN_HANDLE_FREE
  79 };
  80
  81 struct schan_handle
  82 {
  83     void *object;
  84     enum schan_handle_type type;
  85 };
  86
  87 struct schan_credentials
  88 {
  89     ULONG credential_use;
  90     gnutls_certificate_credentials credentials;
  91 };
  92
  93 struct schan_context
  94 {
  95     gnutls_session_t session;
  96     ULONG req_ctx_attr;
  97 };
  98
  99 struct schan_transport;
 100
 101 struct schan_buffers
 102 {
 103     SIZE_T offset;
 104     const SecBufferDesc *desc;
 105     int current_buffer_idx;
 106     BOOL allow_buffer_resize;
 107     int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *);
 108 };
 109
 110 struct schan_transport
 111 {
 112     struct schan_context *ctx;
 113     struct schan_buffers in;
 114     struct schan_buffers out;
 115 };
 116
 117 static struct schan_handle *schan_handle_table;
 118 static struct schan_handle *schan_free_handles;
 119 static SIZE_T schan_handle_table_size;
 120 static SIZE_T schan_handle_count;
 121
 122 static ULONG_PTR schan_alloc_handle(void *object, enum schan_handle_type type)
 123 {
 124     struct schan_handle *handle;
 125
 126     if (schan_free_handles)
 127     {
 128         /* Use a free handle */
 129         handle = schan_free_handles;
 130         if (handle->type != SCHAN_HANDLE_FREE)
 131         {
 132             ERR("Handle %d(%p) is in the free list, but has type %#x.\n", (handle-schan_handle_table), handle, handle->type);
 133             return SCHAN_INVALID_HANDLE;
 134         }
 135         schan_free_handles = handle->object;
 136         handle->object = object;
 137         handle->type = type;
 138
 139         return handle - schan_handle_table;
 140     }
 141     if (!(schan_handle_count < schan_handle_table_size))
 142     {
 143         /* Grow the table */
 144         SIZE_T new_size = schan_handle_table_size + (schan_handle_table_size >> 1);
 145         struct schan_handle *new_table = HeapReAlloc(GetProcessHeap(), 0, schan_handle_table, new_size * sizeof(*schan_handle_table));
 146         if (!new_table)
 147         {
 148             ERR("Failed to grow the handle table\n");
 149             return SCHAN_INVALID_HANDLE;
 150         }
 151         schan_handle_table = new_table;
 152         schan_handle_table_size = new_size;
 153     }
 154
 155     handle = &schan_handle_table[schan_handle_count++];
 156     handle->object = object;
 157     handle->type = type;
 158
 159     return handle - schan_handle_table;
 160 }
 161
 162 static void *schan_free_handle(ULONG_PTR handle_idx, enum schan_handle_type type)
 163 {
 164     struct schan_handle *handle;
 165     void *object;
 166
 167     if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
 168     handle = &schan_handle_table[handle_idx];
 169     if (handle->type != type)
 170     {
 171         ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
 172         return NULL;
 173     }
 174
 175     object = handle->object;
 176     handle->object = schan_free_handles;
 177     handle->type = SCHAN_HANDLE_FREE;
 178     schan_free_handles = handle;
 179
 180     return object;
 181 }
 182
 183 static void *schan_get_object(ULONG_PTR handle_idx, enum schan_handle_type type)
 184 {
 185     struct schan_handle *handle;
 186
 187     if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
 188     handle = &schan_handle_table[handle_idx];
 189     if (handle->type != type)
 190     {
 191         ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
 192         return NULL;
 193     }
 194
 195     return handle->object;
 196 }
 197
 198 static SECURITY_STATUS schan_QueryCredentialsAttributes(
 199  PCredHandle phCredential, ULONG ulAttribute, VOID *pBuffer)
 200 {
 201     SECURITY_STATUS ret;
 202
 203     switch (ulAttribute)
 204     {
 205     case SECPKG_ATTR_SUPPORTED_ALGS:
 206         if (pBuffer)
 207         {
 208             /* FIXME: get from CryptoAPI */
 209             FIXME("SECPKG_ATTR_SUPPORTED_ALGS: stub\n");
 210             ret = SEC_E_UNSUPPORTED_FUNCTION;
 211         }
 212         else
 213             ret = SEC_E_INTERNAL_ERROR;
 214         break;
 215     case SECPKG_ATTR_CIPHER_STRENGTHS:
 216         if (pBuffer)
 217         {
 218             SecPkgCred_CipherStrengths *r = pBuffer;
 219
 220             /* FIXME: get from CryptoAPI */
 221             FIXME("SECPKG_ATTR_CIPHER_STRENGTHS: semi-stub\n");
 222             r->dwMinimumCipherStrength = 40;
 223             r->dwMaximumCipherStrength = 168;
 224             ret = SEC_E_OK;
 225         }
 226         else
 227             ret = SEC_E_INTERNAL_ERROR;
 228         break;
 229     case SECPKG_ATTR_SUPPORTED_PROTOCOLS:
 230         if (pBuffer)
 231         {
 232             /* FIXME: get from OpenSSL? */
 233             FIXME("SECPKG_ATTR_SUPPORTED_PROTOCOLS: stub\n");
 234             ret = SEC_E_UNSUPPORTED_FUNCTION;
 235         }
 236         else
 237             ret = SEC_E_INTERNAL_ERROR;
 238         break;
 239     default:
 240         ret = SEC_E_UNSUPPORTED_FUNCTION;
 241     }
 242     return ret;
 243 }
 244
 245 static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesA(
 246  PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
 247 {
 248     SECURITY_STATUS ret;
 249
 250     TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
 251
 252     switch (ulAttribute)
 253     {
 254     case SECPKG_CRED_ATTR_NAMES:
 255         FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
 256         ret = SEC_E_UNSUPPORTED_FUNCTION;
 257         break;
 258     default:
 259         ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
 260          pBuffer);
 261     }
 262     return ret;
 263 }
 264
 265 static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesW(
 266  PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
 267 {
 268     SECURITY_STATUS ret;
 269
 270     TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
 271
 272     switch (ulAttribute)
 273     {
 274     case SECPKG_CRED_ATTR_NAMES:
 275         FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
 276         ret = SEC_E_UNSUPPORTED_FUNCTION;
 277         break;
 278     default:
 279         ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
 280          pBuffer);
 281     }
 282     return ret;
 283 }
 284
 285 static SECURITY_STATUS schan_CheckCreds(const SCHANNEL_CRED *schanCred)
 286 {
 287     SECURITY_STATUS st;
 288
 289     switch (schanCred->dwVersion)
 290     {
 291     case SCH_CRED_V3:
 292     case SCHANNEL_CRED_VERSION:
 293         break;
 294     default:
 295         return SEC_E_INTERNAL_ERROR;
 296     }
 297
 298     if (schanCred->cCreds == 0)
 299         st = SEC_E_NO_CREDENTIALS;
 300     else if (schanCred->cCreds > 1)
 301         st = SEC_E_UNKNOWN_CREDENTIALS;
 302     else
 303     {
 304         DWORD keySpec;
 305         HCRYPTPROV csp;
 306         BOOL ret, freeCSP;
 307
 308         ret = CryptAcquireCertificatePrivateKey(schanCred->paCred[0],
 309          0, /* FIXME: what flags to use? */ NULL,
 310          &csp, &keySpec, &freeCSP);
 311         if (ret)
 312         {
 313             st = SEC_E_OK;
 314             if (freeCSP)
 315                 CryptReleaseContext(csp, 0);
 316         }
 317         else
 318             st = SEC_E_UNKNOWN_CREDENTIALS;
 319     }
 320     return st;
 321 }
 322
 323 static SECURITY_STATUS schan_AcquireClientCredentials(const SCHANNEL_CRED *schanCred,
 324  PCredHandle phCredential, PTimeStamp ptsExpiry)
 325 {
 326     struct schan_credentials *creds;
 327     SECURITY_STATUS st = SEC_E_OK;
 328
 329     TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
 330
 331     if (schanCred)
 332     {
 333         st = schan_CheckCreds(schanCred);
 334         if (st == SEC_E_NO_CREDENTIALS)
 335             st = SEC_E_OK;
 336     }
 337
 338     /* For now, the only thing I'm interested in is the direction of the
 339      * connection, so just store it.
 340      */
 341     if (st == SEC_E_OK)
 342     {
 343         ULONG_PTR handle;
 344         int ret;
 345
 346         creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
 347         if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
 348
 349         handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
 350         if (handle == SCHAN_INVALID_HANDLE) goto fail;
 351
 352         creds->credential_use = SECPKG_CRED_OUTBOUND;
 353         ret = pgnutls_certificate_allocate_credentials(&creds->credentials);
 354         if (ret != GNUTLS_E_SUCCESS)
 355         {
 356             pgnutls_perror(ret);
 357             schan_free_handle(handle, SCHAN_HANDLE_CRED);
 358             goto fail;
 359         }
 360
 361         phCredential->dwLower = handle;
 362         phCredential->dwUpper = 0;
 363
 364         /* Outbound credentials have no expiry */
 365         if (ptsExpiry)
 366         {
 367             ptsExpiry->LowPart = 0;
 368             ptsExpiry->HighPart = 0;
 369         }
 370     }
 371     return st;
 372
 373 fail:
 374     HeapFree(GetProcessHeap(), 0, creds);
 375     return SEC_E_INTERNAL_ERROR;
 376 }
 377
 378 static SECURITY_STATUS schan_AcquireServerCredentials(const SCHANNEL_CRED *schanCred,
 379  PCredHandle phCredential, PTimeStamp ptsExpiry)
 380 {
 381     SECURITY_STATUS st;
 382
 383     TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
 384
 385     if (!schanCred) return SEC_E_NO_CREDENTIALS;
 386
 387     st = schan_CheckCreds(schanCred);
 388     if (st == SEC_E_OK)
 389     {
 390         ULONG_PTR handle;
 391         struct schan_credentials *creds;
 392
 393         creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
 394         if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
 395         creds->credential_use = SECPKG_CRED_INBOUND;
 396
 397         handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
 398         if (handle == SCHAN_INVALID_HANDLE)
 399         {
 400             HeapFree(GetProcessHeap(), 0, creds);
 401             return SEC_E_INTERNAL_ERROR;
 402         }
 403
 404         phCredential->dwLower = handle;
 405         phCredential->dwUpper = 0;
 406
 407         /* FIXME: get expiry from cert */
 408     }
 409     return st;
 410 }
 411
 412 static SECURITY_STATUS schan_AcquireCredentialsHandle(ULONG fCredentialUse,
 413  const SCHANNEL_CRED *schanCred, PCredHandle phCredential, PTimeStamp ptsExpiry)
 414 {
 415     SECURITY_STATUS ret;
 416
 417     if (fCredentialUse == SECPKG_CRED_OUTBOUND)
 418         ret = schan_AcquireClientCredentials(schanCred, phCredential,
 419          ptsExpiry);
 420     else
 421         ret = schan_AcquireServerCredentials(schanCred, phCredential,
 422          ptsExpiry);
 423     return ret;
 424 }
 425
 426 static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleA(
 427  SEC_CHAR *pszPrincipal, SEC_CHAR *pszPackage, ULONG fCredentialUse,
 428  PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
 429  PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
 430 {
 431     TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
 432      debugstr_a(pszPrincipal), debugstr_a(pszPackage), fCredentialUse,
 433      pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
 434     return schan_AcquireCredentialsHandle(fCredentialUse,
 435      pAuthData, phCredential, ptsExpiry);
 436 }
 437
 438 static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleW(
 439  SEC_WCHAR *pszPrincipal, SEC_WCHAR *pszPackage, ULONG fCredentialUse,
 440  PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
 441  PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
 442 {
 443     TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
 444      debugstr_w(pszPrincipal), debugstr_w(pszPackage), fCredentialUse,
 445      pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
 446     return schan_AcquireCredentialsHandle(fCredentialUse,
 447      pAuthData, phCredential, ptsExpiry);
 448 }
 449
 450 static SECURITY_STATUS SEC_ENTRY schan_FreeCredentialsHandle(
 451  PCredHandle phCredential)
 452 {
 453     struct schan_credentials *creds;
 454
 455     TRACE("phCredential %p\n", phCredential);
 456
 457     if (!phCredential) return SEC_E_INVALID_HANDLE;
 458
 459     creds = schan_free_handle(phCredential->dwLower, SCHAN_HANDLE_CRED);
 460     if (!creds) return SEC_E_INVALID_HANDLE;
 461
 462     if (creds->credential_use == SECPKG_CRED_OUTBOUND)
 463         pgnutls_certificate_free_credentials(creds->credentials);
 464     HeapFree(GetProcessHeap(), 0, creds);
 465
 466     return SEC_E_OK;
 467 }
 468
 469 static void init_schan_buffers(struct schan_buffers *s, const PSecBufferDesc desc,
 470         int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *))
 471 {
 472     s->offset = 0;
 473     s->desc = desc;
 474     s->current_buffer_idx = -1;
 475     s->allow_buffer_resize = FALSE;
 476     s->get_next_buffer = get_next_buffer;
 477 }
 478
 479 static int schan_find_sec_buffer_idx(const SecBufferDesc *desc, unsigned int start_idx, ULONG buffer_type)
 480 {
 481     unsigned int i;
 482     PSecBuffer buffer;
 483
 484     for (i = start_idx; i < desc->cBuffers; ++i)
 485     {
 486         buffer = &desc->pBuffers[i];
 487         if (buffer->BufferType == buffer_type) return i;
 488     }
 489
 490     return -1;
 491 }
 492
 493 static void schan_resize_current_buffer(const struct schan_buffers *s, SIZE_T min_size)
 494 {
 495     SecBuffer *b = &s->desc->pBuffers[s->current_buffer_idx];
 496     SIZE_T new_size = b->cbBuffer ? b->cbBuffer * 2 : 128;
 497     void *new_data;
 498
 499     if (b->cbBuffer >= min_size || !s->allow_buffer_resize || min_size > UINT_MAX / 2) return;
 500
 501     while (new_size < min_size) new_size *= 2;
 502
 503     if (b->pvBuffer)
 504         new_data = HeapReAlloc(GetProcessHeap(), 0, b->pvBuffer, new_size);
 505     else
 506         new_data = HeapAlloc(GetProcessHeap(), 0, new_size);
 507
 508     if (!new_data)
 509     {
 510         TRACE("Failed to resize %p from %d to %ld\n", b->pvBuffer, b->cbBuffer, new_size);
 511         return;
 512     }
 513
 514     b->cbBuffer = new_size;
 515     b->pvBuffer = new_data;
 516 }
 517
 518 static char *schan_get_buffer(const struct schan_transport *t, struct schan_buffers *s, size_t *count)
 519 {
 520     SIZE_T max_count;
 521     PSecBuffer buffer;
 522
 523     if (!s->desc)
 524     {
 525         TRACE("No desc\n");
 526         return NULL;
 527     }
 528
 529     if (s->current_buffer_idx == -1)
 530     {
 531         /* Initial buffer */
 532         int buffer_idx = s->get_next_buffer(t, s);
 533         if (buffer_idx == -1)
 534         {
 535             TRACE("No next buffer\n");
 536             return NULL;
 537         }
 538         s->current_buffer_idx = buffer_idx;
 539     }
 540
 541     buffer = &s->desc->pBuffers[s->current_buffer_idx];
 542     TRACE("Using buffer %d: cbBuffer %d, BufferType %#x, pvBuffer %p\n", s->current_buffer_idx, buffer->cbBuffer, buffer->BufferType, buffer->pvBuffer);
 543
 544     schan_resize_current_buffer(s, s->offset + *count);
 545     max_count = buffer->cbBuffer - s->offset;
 546     if (!max_count)
 547     {
 548         int buffer_idx;
 549
 550         s->allow_buffer_resize = FALSE;
 551         buffer_idx = s->get_next_buffer(t, s);
 552         if (buffer_idx == -1)
 553         {
 554             TRACE("No next buffer\n");
 555             return NULL;
 556         }
 557         s->current_buffer_idx = buffer_idx;
 558         s->offset = 0;
 559         return schan_get_buffer(t, s, count);
 560     }
 561
 562     if (*count > max_count) *count = max_count;
 563     return (char *)buffer->pvBuffer + s->offset;
 564 }
 565
 566 static ssize_t schan_pull(gnutls_transport_ptr_t transport, void *buff, size_t buff_len)
 567 {
 568     struct schan_transport *t = transport;
 569     char *b;
 570
 571     TRACE("Pull %zu bytes\n", buff_len);
 572
 573     b = schan_get_buffer(t, &t->in, &buff_len);
 574     if (!b)
 575     {
 576         pgnutls_transport_set_errno(t->ctx->session, EAGAIN);
 577         return -1;
 578     }
 579
 580     memcpy(buff, b, buff_len);
 581     t->in.offset += buff_len;
 582
 583     TRACE("Read %zu bytes\n", buff_len);
 584
 585     return buff_len;
 586 }
 587
 588 static ssize_t schan_push(gnutls_transport_ptr_t transport, const void *buff, size_t buff_len)
 589 {
 590     struct schan_transport *t = transport;
 591     char *b;
 592
 593     TRACE("Push %zu bytes\n", buff_len);
 594
 595     b = schan_get_buffer(t, &t->out, &buff_len);
 596     if (!b)
 597     {
 598         pgnutls_transport_set_errno(t->ctx->session, EAGAIN);
 599         return -1;
 600     }
 601
 602     memcpy(b, buff, buff_len);
 603     t->out.offset += buff_len;
 604
 605     TRACE("Wrote %zu bytes\n", buff_len);
 606
 607     return buff_len;
 608 }
 609
 610 static int schan_init_sec_ctx_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
 611 {
 612     if (s->current_buffer_idx == -1)
 613     {
 614         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
 615         if (t->ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
 616         {
 617             if (idx == -1)
 618             {
 619                 idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_EMPTY);
 620                 if (idx != -1) s->desc->pBuffers[idx].BufferType = SECBUFFER_TOKEN;
 621             }
 622             if (idx != -1 && !s->desc->pBuffers[idx].pvBuffer)
 623             {
 624                 s->desc->pBuffers[idx].cbBuffer = 0;
 625                 s->allow_buffer_resize = TRUE;
 626             }
 627         }
 628         return idx;
 629     }
 630
 631     return -1;
 632 }
 633
 634 static void dump_buffer_desc(SecBufferDesc *desc)
 635 {
 636     unsigned int i;
 637
 638     if (!desc) return;
 639     TRACE("Buffer desc %p:\n", desc);
 640     for (i = 0; i < desc->cBuffers; ++i)
 641     {
 642         SecBuffer *b = &desc->pBuffers[i];
 643         TRACE("\tbuffer %u: cbBuffer %d, BufferType %#x pvBuffer %p\n", i, b->cbBuffer, b->BufferType, b->pvBuffer);
 644     }
 645 }
 646
 647 /***********************************************************************
 648  *              InitializeSecurityContextW
 649  */
 650 static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextW(
 651  PCredHandle phCredential, PCtxtHandle phContext, SEC_WCHAR *pszTargetName,
 652  ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
 653  PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
 654  PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
 655 {
 656     struct schan_context *ctx;
 657     struct schan_buffers *out_buffers;
 658     struct schan_credentials *cred;
 659     struct schan_transport transport;
 660     int err;
 661
 662     TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
 663      debugstr_w(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
 664      Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
 665
 666     dump_buffer_desc(pInput);
 667     dump_buffer_desc(pOutput);
 668
 669     if (!phContext)
 670     {
 671         ULONG_PTR handle;
 672
 673         if (!phCredential) return SEC_E_INVALID_HANDLE;
 674
 675         cred = schan_get_object(phCredential->dwLower, SCHAN_HANDLE_CRED);
 676         if (!cred) return SEC_E_INVALID_HANDLE;
 677
 678         if (!(cred->credential_use & SECPKG_CRED_OUTBOUND))
 679         {
 680             WARN("Invalid credential use %#x\n", cred->credential_use);
 681             return SEC_E_INVALID_HANDLE;
 682         }
 683
 684         ctx = HeapAlloc(GetProcessHeap(), 0, sizeof(*ctx));
 685         if (!ctx) return SEC_E_INSUFFICIENT_MEMORY;
 686
 687         handle = schan_alloc_handle(ctx, SCHAN_HANDLE_CTX);
 688         if (handle == SCHAN_INVALID_HANDLE)
 689         {
 690             HeapFree(GetProcessHeap(), 0, ctx);
 691             return SEC_E_INTERNAL_ERROR;
 692         }
 693
 694         err = pgnutls_init(&ctx->session, GNUTLS_CLIENT);
 695         if (err != GNUTLS_E_SUCCESS)
 696         {
 697             pgnutls_perror(err);
 698             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 699             HeapFree(GetProcessHeap(), 0, ctx);
 700             return SEC_E_INTERNAL_ERROR;
 701         }
 702
 703         /* FIXME: We should be using the information from the credentials here. */
 704         FIXME("Using hardcoded \"NORMAL\" priority\n");
 705         err = pgnutls_set_default_priority(ctx->session);
 706         if (err != GNUTLS_E_SUCCESS)
 707         {
 708             pgnutls_perror(err);
 709             pgnutls_deinit(ctx->session);
 710             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 711             HeapFree(GetProcessHeap(), 0, ctx);
 712         }
 713
 714         err = pgnutls_credentials_set(ctx->session, GNUTLS_CRD_CERTIFICATE, cred->credentials);
 715         if (err != GNUTLS_E_SUCCESS)
 716         {
 717             pgnutls_perror(err);
 718             pgnutls_deinit(ctx->session);
 719             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 720             HeapFree(GetProcessHeap(), 0, ctx);
 721         }
 722
 723         pgnutls_transport_set_pull_function(ctx->session, schan_pull);
 724         pgnutls_transport_set_push_function(ctx->session, schan_push);
 725
 726         phNewContext->dwLower = handle;
 727         phNewContext->dwUpper = 0;
 728     }
 729     else
 730     {
 731         ctx = schan_get_object(phContext->dwLower, SCHAN_HANDLE_CTX);
 732     }
 733
 734     ctx->req_ctx_attr = fContextReq;
 735
 736     transport.ctx = ctx;
 737     init_schan_buffers(&transport.in, pInput, schan_init_sec_ctx_get_next_buffer);
 738     init_schan_buffers(&transport.out, pOutput, schan_init_sec_ctx_get_next_buffer);
 739     pgnutls_transport_set_ptr(ctx->session, &transport);
 740
 741     /* Perform the TLS handshake */
 742     err = pgnutls_handshake(ctx->session);
 743
 744     out_buffers = &transport.out;
 745     if (out_buffers->current_buffer_idx != -1)
 746     {
 747         SecBuffer *buffer = &out_buffers->desc->pBuffers[out_buffers->current_buffer_idx];
 748         buffer->cbBuffer = out_buffers->offset;
 749     }
 750
 751     *pfContextAttr = 0;
 752     if (ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
 753         *pfContextAttr |= ISC_RET_ALLOCATED_MEMORY;
 754
 755     switch(err)
 756     {
 757         case GNUTLS_E_SUCCESS:
 758             TRACE("Handshake completed\n");
 759             return SEC_E_OK;
 760
 761         case GNUTLS_E_AGAIN:
 762             TRACE("Continue...\n");
 763             return SEC_I_CONTINUE_NEEDED;
 764
 765         case GNUTLS_E_WARNING_ALERT_RECEIVED:
 766         case GNUTLS_E_FATAL_ALERT_RECEIVED:
 767         {
 768             gnutls_alert_description_t alert = pgnutls_alert_get(ctx->session);
 769             const char *alert_name = pgnutls_alert_get_name(alert);
 770             WARN("ALERT: %d %s\n", alert, alert_name);
 771             return SEC_E_INTERNAL_ERROR;
 772         }
 773
 774         default:
 775             pgnutls_perror(err);
 776             return SEC_E_INTERNAL_ERROR;
 777     }
 778 }
 779
 780 /***********************************************************************
 781  *              InitializeSecurityContextA
 782  */
 783 static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextA(
 784  PCredHandle phCredential, PCtxtHandle phContext, SEC_CHAR *pszTargetName,
 785  ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
 786  PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
 787  PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
 788 {
 789     SECURITY_STATUS ret;
 790     SEC_WCHAR *target_name = NULL;
 791
 792     TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
 793      debugstr_a(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
 794      Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
 795
 796     if (pszTargetName)
 797     {
 798         INT len = MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, NULL, 0);
 799         target_name = HeapAlloc(GetProcessHeap(), 0, len * sizeof(*target_name));
 800         MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, target_name, len);
 801     }
 802
 803     ret = schan_InitializeSecurityContextW(phCredential, phContext, target_name,
 804             fContextReq, Reserved1, TargetDataRep, pInput, Reserved2,
 805             phNewContext, pOutput, pfContextAttr, ptsExpiry);
 806
 807     HeapFree(GetProcessHeap(), 0, target_name);
 808
 809     return ret;
 810 }
 811
 812 static unsigned int schannel_get_cipher_block_size(gnutls_cipher_algorithm_t cipher)
 813 {
 814     const struct
 815     {
 816         gnutls_cipher_algorithm_t cipher;
 817         unsigned int block_size;
 818     }
 819     algorithms[] =
 820     {
 821         {GNUTLS_CIPHER_3DES_CBC, 8},
 822         {GNUTLS_CIPHER_AES_128_CBC, 16},
 823         {GNUTLS_CIPHER_AES_256_CBC, 16},
 824         {GNUTLS_CIPHER_ARCFOUR_128, 1},
 825         {GNUTLS_CIPHER_ARCFOUR_40, 1},
 826         {GNUTLS_CIPHER_DES_CBC, 8},
 827         {GNUTLS_CIPHER_NULL, 1},
 828         {GNUTLS_CIPHER_RC2_40_CBC, 8},
 829     };
 830     unsigned int i;
 831
 832     for (i = 0; i < sizeof(algorithms) / sizeof(*algorithms); ++i)
 833     {
 834         if (algorithms[i].cipher == cipher)
 835             return algorithms[i].block_size;
 836     }
 837
 838     FIXME("Unknown cipher %#x, returning 1\n", cipher);
 839
 840     return 1;
 841 }
 842
 843 static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesW(
 844         PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
 845 {
 846     struct schan_context *ctx;
 847
 848     TRACE("context_handle %p, attribute %#x, buffer %p\n",
 849             context_handle, attribute, buffer);
 850
 851     if (!context_handle) return SEC_E_INVALID_HANDLE;
 852     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
 853
 854     switch(attribute)
 855     {
 856         case SECPKG_ATTR_STREAM_SIZES:
 857         {
 858             SecPkgContext_StreamSizes *stream_sizes = buffer;
 859             gnutls_mac_algorithm_t mac = pgnutls_mac_get(ctx->session);
 860             size_t mac_size = pgnutls_mac_get_key_size(mac);
 861             gnutls_cipher_algorithm_t cipher = pgnutls_cipher_get(ctx->session);
 862             unsigned int block_size = schannel_get_cipher_block_size(cipher);
 863
 864             TRACE("Using %zu mac bytes, block size %u\n", mac_size, block_size);
 865
 866             /* These are defined by the TLS RFC */
 867             stream_sizes->cbHeader = 5;
 868             stream_sizes->cbTrailer = mac_size + 256; /* Max 255 bytes padding + 1 for padding size */
 869             stream_sizes->cbMaximumMessage = 1 << 14;
 870             stream_sizes->cbBuffers = 4;
 871             stream_sizes->cbBlockSize = block_size;
 872             return SEC_E_OK;
 873         }
 874
 875         default:
 876             FIXME("Unhandled attribute %#x\n", attribute);
 877             return SEC_E_UNSUPPORTED_FUNCTION;
 878     }
 879 }
 880
 881 static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesA(
 882         PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
 883 {
 884     TRACE("context_handle %p, attribute %#x, buffer %p\n",
 885             context_handle, attribute, buffer);
 886
 887     switch(attribute)
 888     {
 889         case SECPKG_ATTR_STREAM_SIZES:
 890             return schan_QueryContextAttributesW(context_handle, attribute, buffer);
 891
 892         default:
 893             FIXME("Unhandled attribute %#x\n", attribute);
 894             return SEC_E_UNSUPPORTED_FUNCTION;
 895     }
 896 }
 897
 898 static int schan_encrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
 899 {
 900     SecBuffer *b;
 901
 902     if (s->current_buffer_idx == -1)
 903         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_HEADER);
 904
 905     b = &s->desc->pBuffers[s->current_buffer_idx];
 906
 907     if (b->BufferType == SECBUFFER_STREAM_HEADER)
 908         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
 909
 910     if (b->BufferType == SECBUFFER_DATA)
 911         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_TRAILER);
 912
 913     return -1;
 914 }
 915
 916 static int schan_encrypt_message_get_next_buffer_token(const struct schan_transport *t, struct schan_buffers *s)
 917 {
 918     SecBuffer *b;
 919
 920     if (s->current_buffer_idx == -1)
 921         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
 922
 923     b = &s->desc->pBuffers[s->current_buffer_idx];
 924
 925     if (b->BufferType == SECBUFFER_TOKEN)
 926     {
 927         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
 928         if (idx != s->current_buffer_idx) return -1;
 929         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
 930     }
 931
 932     if (b->BufferType == SECBUFFER_DATA)
 933     {
 934         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
 935         if (idx != -1)
 936             idx = schan_find_sec_buffer_idx(s->desc, idx + 1, SECBUFFER_TOKEN);
 937         return idx;
 938     }
 939
 940     return -1;
 941 }
 942
 943 static SECURITY_STATUS SEC_ENTRY schan_EncryptMessage(PCtxtHandle context_handle,
 944         ULONG quality, PSecBufferDesc message, ULONG message_seq_no)
 945 {
 946     struct schan_transport transport;
 947     struct schan_context *ctx;
 948     struct schan_buffers *b;
 949     SecBuffer *buffer;
 950     SIZE_T data_size;
 951     char *data;
 952     ssize_t sent = 0;
 953     ssize_t ret;
 954     int idx;
 955
 956     TRACE("context_handle %p, quality %d, message %p, message_seq_no %d\n",
 957             context_handle, quality, message, message_seq_no);
 958
 959     if (!context_handle) return SEC_E_INVALID_HANDLE;
 960     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
 961
 962     dump_buffer_desc(message);
 963
 964     idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
 965     if (idx == -1)
 966     {
 967         WARN("No data buffer passed\n");
 968         return SEC_E_INTERNAL_ERROR;
 969     }
 970     buffer = &message->pBuffers[idx];
 971
 972     data_size = buffer->cbBuffer;
 973     data = HeapAlloc(GetProcessHeap(), 0, data_size);
 974     memcpy(data, buffer->pvBuffer, data_size);
 975
 976     transport.ctx = ctx;
 977     init_schan_buffers(&transport.in, NULL, NULL);
 978     if (schan_find_sec_buffer_idx(message, 0, SECBUFFER_STREAM_HEADER) != -1)
 979         init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer);
 980     else
 981         init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer_token);
 982     pgnutls_transport_set_ptr(ctx->session, &transport);
 983
 984     while (sent < data_size)
 985     {
 986         ret = pgnutls_record_send(ctx->session, data + sent, data_size - sent);
 987         if (ret < 0)
 988         {
 989             if (ret != GNUTLS_E_AGAIN)
 990             {
 991                 pgnutls_perror(ret);
 992                 HeapFree(GetProcessHeap(), 0, data);
 993                 ERR("Returning SEC_E_INTERNAL_ERROR\n");
 994                 return SEC_E_INTERNAL_ERROR;
 995             }
 996             else break;
 997         }
 998         sent += ret;
 999     }
1000
1001     TRACE("Sent %zd bytes\n", sent);
1002
1003     b = &transport.out;
1004     b->desc->pBuffers[b->current_buffer_idx].cbBuffer = b->offset;
1005     HeapFree(GetProcessHeap(), 0, data);
1006
1007     return SEC_E_OK;
1008 }
1009
1010 static int schan_decrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
1011 {
1012     if (s->current_buffer_idx == -1)
1013         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
1014
1015     return -1;
1016 }
1017
1018 static SECURITY_STATUS SEC_ENTRY schan_DecryptMessage(PCtxtHandle context_handle,
1019         PSecBufferDesc message, ULONG message_seq_no, PULONG quality)
1020 {
1021     struct schan_transport transport;
1022     struct schan_context *ctx;
1023     SecBuffer *buffer;
1024     SIZE_T data_size;
1025     char *data;
1026     ssize_t received = 0;
1027     ssize_t ret;
1028     int idx;
1029
1030     TRACE("context_handle %p, message %p, message_seq_no %d, quality %p\n",
1031             context_handle, message, message_seq_no, quality);
1032
1033     if (!context_handle) return SEC_E_INVALID_HANDLE;
1034     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
1035
1036     dump_buffer_desc(message);
1037
1038     idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
1039     if (idx == -1)
1040     {
1041         WARN("No data buffer passed\n");
1042         return SEC_E_INTERNAL_ERROR;
1043     }
1044     buffer = &message->pBuffers[idx];
1045
1046     data_size = buffer->cbBuffer;
1047     data = HeapAlloc(GetProcessHeap(), 0, data_size);
1048
1049     transport.ctx = ctx;
1050     init_schan_buffers(&transport.in, message, schan_decrypt_message_get_next_buffer);
1051     init_schan_buffers(&transport.out, NULL, NULL);
1052     pgnutls_transport_set_ptr(ctx->session, (gnutls_transport_ptr_t)&transport);
1053
1054     while (received < data_size)
1055     {
1056         ret = pgnutls_record_recv(ctx->session, data + received, data_size - received);
1057         if (ret < 0)
1058         {
1059             if (ret == GNUTLS_E_AGAIN)
1060             {
1061                 if (!received)
1062                 {
1063                     pgnutls_perror(ret);
1064                     HeapFree(GetProcessHeap(), 0, data);
1065                     TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
1066                     return SEC_E_INCOMPLETE_MESSAGE;
1067                 }
1068                 break;
1069             }
1070             else
1071             {
1072                 pgnutls_perror(ret);
1073                 HeapFree(GetProcessHeap(), 0, data);
1074                 ERR("Returning SEC_E_INTERNAL_ERROR\n");
1075                 return SEC_E_INTERNAL_ERROR;
1076             }
1077         }
1078         received += ret;
1079     }
1080
1081     TRACE("Received %zd bytes\n", received);
1082
1083     memcpy(buffer->pvBuffer, data, received);
1084     buffer->cbBuffer = received;
1085     HeapFree(GetProcessHeap(), 0, data);
1086
1087     return SEC_E_OK;
1088 }
1089
1090 static SECURITY_STATUS SEC_ENTRY schan_DeleteSecurityContext(PCtxtHandle context_handle)
1091 {
1092     struct schan_context *ctx;
1093
1094     TRACE("context_handle %p\n", context_handle);
1095
1096     if (!context_handle) return SEC_E_INVALID_HANDLE;
1097
1098     ctx = schan_free_handle(context_handle->dwLower, SCHAN_HANDLE_CTX);
1099     if (!ctx) return SEC_E_INVALID_HANDLE;
1100
1101     pgnutls_deinit(ctx->session);
1102     HeapFree(GetProcessHeap(), 0, ctx);
1103
1104     return SEC_E_OK;
1105 }
1106
1107 static void schan_gnutls_log(int level, const char *msg)
1108 {
1109     TRACE("<%d> %s", level, msg);
1110 }
1111
1112 static const SecurityFunctionTableA schanTableA = {
1113     1,
1114     NULL, /* EnumerateSecurityPackagesA */
1115     schan_QueryCredentialsAttributesA,
1116     schan_AcquireCredentialsHandleA,
1117     schan_FreeCredentialsHandle,
1118     NULL, /* Reserved2 */
1119     schan_InitializeSecurityContextA,
1120     NULL, /* AcceptSecurityContext */
1121     NULL, /* CompleteAuthToken */
1122     schan_DeleteSecurityContext,
1123     NULL, /* ApplyControlToken */
1124     schan_QueryContextAttributesA,
1125     NULL, /* ImpersonateSecurityContext */
1126     NULL, /* RevertSecurityContext */
1127     NULL, /* MakeSignature */
1128     NULL, /* VerifySignature */
1129     FreeContextBuffer,
1130     NULL, /* QuerySecurityPackageInfoA */
1131     NULL, /* Reserved3 */
1132     NULL, /* Reserved4 */
1133     NULL, /* ExportSecurityContext */
1134     NULL, /* ImportSecurityContextA */
1135     NULL, /* AddCredentialsA */
1136     NULL, /* Reserved8 */
1137     NULL, /* QuerySecurityContextToken */
1138     schan_EncryptMessage,
1139     schan_DecryptMessage,
1140     NULL, /* SetContextAttributesA */
1141 };
1142
1143 static const SecurityFunctionTableW schanTableW = {
1144     1,
1145     NULL, /* EnumerateSecurityPackagesW */
1146     schan_QueryCredentialsAttributesW,
1147     schan_AcquireCredentialsHandleW,
1148     schan_FreeCredentialsHandle,
1149     NULL, /* Reserved2 */
1150     schan_InitializeSecurityContextW,
1151     NULL, /* AcceptSecurityContext */
1152     NULL, /* CompleteAuthToken */
1153     schan_DeleteSecurityContext,
1154     NULL, /* ApplyControlToken */
1155     schan_QueryContextAttributesW,
1156     NULL, /* ImpersonateSecurityContext */
1157     NULL, /* RevertSecurityContext */
1158     NULL, /* MakeSignature */
1159     NULL, /* VerifySignature */
1160     FreeContextBuffer,
1161     NULL, /* QuerySecurityPackageInfoW */
1162     NULL, /* Reserved3 */
1163     NULL, /* Reserved4 */
1164     NULL, /* ExportSecurityContext */
1165     NULL, /* ImportSecurityContextW */
1166     NULL, /* AddCredentialsW */
1167     NULL, /* Reserved8 */
1168     NULL, /* QuerySecurityContextToken */
1169     schan_EncryptMessage,
1170     schan_DecryptMessage,
1171     NULL, /* SetContextAttributesW */
1172 };
1173
1174 static const WCHAR schannelComment[] = { 'S','c','h','a','n','n','e','l',' ',
1175  'S','e','c','u','r','i','t','y',' ','P','a','c','k','a','g','e',0 };
1176 static const WCHAR schannelDllName[] = { 's','c','h','a','n','n','e','l','.','d','l','l',0 };
1177
1178 void SECUR32_initSchannelSP(void)
1179 {
1180     /* This is what Windows reports.  This shouldn't break any applications
1181      * even though the functions are missing, because the wrapper will
1182      * return SEC_E_UNSUPPORTED_FUNCTION if our function is NULL.
1183      */
1184     static const long caps =
1185         SECPKG_FLAG_INTEGRITY |
1186         SECPKG_FLAG_PRIVACY |
1187         SECPKG_FLAG_CONNECTION |
1188         SECPKG_FLAG_MULTI_REQUIRED |
1189         SECPKG_FLAG_EXTENDED_ERROR |
1190         SECPKG_FLAG_IMPERSONATION |
1191         SECPKG_FLAG_ACCEPT_WIN32_NAME |
1192         SECPKG_FLAG_STREAM;
1193     static const short version = 1;
1194     static const long maxToken = 16384;
1195     SEC_WCHAR *uniSPName = (SEC_WCHAR *)UNISP_NAME_W,
1196               *schannel = (SEC_WCHAR *)SCHANNEL_NAME_W;
1197     const SecPkgInfoW info[] = {
1198         { caps, version, UNISP_RPC_ID, maxToken, uniSPName, uniSPName },
1199         { caps, version, UNISP_RPC_ID, maxToken, schannel,
1200             (SEC_WCHAR *)schannelComment },
1201     };
1202     SecureProvider *provider;
1203     int ret;
1204
1205     libgnutls_handle = wine_dlopen(SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0);
1206     if (!libgnutls_handle)
1207     {
1208         WARN("Failed to load libgnutls.\n");
1209         return;
1210     }
1211
1212 #define LOAD_FUNCPTR(f) \
1213     if (!(p##f = wine_dlsym(libgnutls_handle, #f, NULL, 0))) \
1214     { \
1215         ERR("Failed to load %s\n", #f); \
1216         goto fail; \
1217     }
1218
1219     LOAD_FUNCPTR(gnutls_alert_get)
1220     LOAD_FUNCPTR(gnutls_alert_get_name)
1221     LOAD_FUNCPTR(gnutls_certificate_allocate_credentials)
1222     LOAD_FUNCPTR(gnutls_certificate_free_credentials)
1223     LOAD_FUNCPTR(gnutls_cipher_get)
1224     LOAD_FUNCPTR(gnutls_credentials_set)
1225     LOAD_FUNCPTR(gnutls_deinit)
1226     LOAD_FUNCPTR(gnutls_global_deinit)
1227     LOAD_FUNCPTR(gnutls_global_init)
1228     LOAD_FUNCPTR(gnutls_global_set_log_function)
1229     LOAD_FUNCPTR(gnutls_global_set_log_level)
1230     LOAD_FUNCPTR(gnutls_handshake)
1231     LOAD_FUNCPTR(gnutls_init)
1232     LOAD_FUNCPTR(gnutls_mac_get)
1233     LOAD_FUNCPTR(gnutls_mac_get_key_size)
1234     LOAD_FUNCPTR(gnutls_perror)
1235     LOAD_FUNCPTR(gnutls_set_default_priority)
1236     LOAD_FUNCPTR(gnutls_record_recv);
1237     LOAD_FUNCPTR(gnutls_record_send);
1238     LOAD_FUNCPTR(gnutls_transport_set_errno)
1239     LOAD_FUNCPTR(gnutls_transport_set_ptr)
1240     LOAD_FUNCPTR(gnutls_transport_set_pull_function)
1241     LOAD_FUNCPTR(gnutls_transport_set_push_function)
1242 #undef LOAD_FUNCPTR
1243
1244     ret = pgnutls_global_init();
1245     if (ret != GNUTLS_E_SUCCESS)
1246     {
1247         pgnutls_perror(ret);
1248         goto fail;
1249     }
1250
1251     if (TRACE_ON(secur32))
1252     {
1253         pgnutls_global_set_log_level(4);
1254         pgnutls_global_set_log_function(schan_gnutls_log);
1255     }
1256
1257     schan_handle_table = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 64 * sizeof(*schan_handle_table));
1258     if (!schan_handle_table)
1259     {
1260         ERR("Failed to allocate schannel handle table.\n");
1261         goto fail;
1262     }
1263     schan_handle_table_size = 64;
1264
1265     provider = SECUR32_addProvider(&schanTableA, &schanTableW, schannelDllName);
1266     if (!provider)
1267     {
1268         ERR("Failed to add schannel provider.\n");
1269         goto fail;
1270     }
1271
1272     SECUR32_addPackages(provider, sizeof(info) / sizeof(info[0]), NULL, info);
1273
1274     return;
1275
1276 fail:
1277     HeapFree(GetProcessHeap(), 0, schan_handle_table);
1278     schan_handle_table = NULL;
1279     wine_dlclose(libgnutls_handle, NULL, 0);
1280     libgnutls_handle = NULL;
1281     return;
1282 }
1283
1284 void SECUR32_deinitSchannelSP(void)
1285 {
1286     if (!libgnutls_handle) return;
1287
1288     pgnutls_global_deinit();
1289     wine_dlclose(libgnutls_handle, NULL, 0);
1290 }
1291
1292 #else /* SONAME_LIBGNUTLS */
1293
1294 void SECUR32_initSchannelSP(void) {}
1295 void SECUR32_deinitSchannelSP(void) {}
1296
1297 #endif /* SONAME_LIBGNUTLS */