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_certificate_get_peers);
  52 MAKE_FUNCPTR(gnutls_cipher_get);
  53 MAKE_FUNCPTR(gnutls_cipher_get_key_size);
  54 MAKE_FUNCPTR(gnutls_credentials_set);
  55 MAKE_FUNCPTR(gnutls_deinit);
  56 MAKE_FUNCPTR(gnutls_global_deinit);
  57 MAKE_FUNCPTR(gnutls_global_init);
  58 MAKE_FUNCPTR(gnutls_global_set_log_function);
  59 MAKE_FUNCPTR(gnutls_global_set_log_level);
  60 MAKE_FUNCPTR(gnutls_handshake);
  61 MAKE_FUNCPTR(gnutls_init);
  62 MAKE_FUNCPTR(gnutls_kx_get);
  63 MAKE_FUNCPTR(gnutls_mac_get);
  64 MAKE_FUNCPTR(gnutls_mac_get_key_size);
  65 MAKE_FUNCPTR(gnutls_perror);
  66 MAKE_FUNCPTR(gnutls_protocol_get_version);
  67 MAKE_FUNCPTR(gnutls_set_default_priority);
  68 MAKE_FUNCPTR(gnutls_record_recv);
  69 MAKE_FUNCPTR(gnutls_record_send);
  70 MAKE_FUNCPTR(gnutls_transport_set_errno);
  71 MAKE_FUNCPTR(gnutls_transport_set_ptr);
  72 MAKE_FUNCPTR(gnutls_transport_set_pull_function);
  73 MAKE_FUNCPTR(gnutls_transport_set_push_function);
  74 #undef MAKE_FUNCPTR
  75
  76 #define SCHAN_INVALID_HANDLE ~0UL
  77
  78 enum schan_handle_type
  79 {
  80     SCHAN_HANDLE_CRED,
  81     SCHAN_HANDLE_CTX,
  82     SCHAN_HANDLE_FREE
  83 };
  84
  85 struct schan_handle
  86 {
  87     void *object;
  88     enum schan_handle_type type;
  89 };
  90
  91 struct schan_credentials
  92 {
  93     ULONG credential_use;
  94     gnutls_certificate_credentials credentials;
  95 };
  96
  97 struct schan_context
  98 {
  99     gnutls_session_t session;
 100     ULONG req_ctx_attr;
 101 };
 102
 103 struct schan_transport;
 104
 105 struct schan_buffers
 106 {
 107     SIZE_T offset;
 108     const SecBufferDesc *desc;
 109     int current_buffer_idx;
 110     BOOL allow_buffer_resize;
 111     int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *);
 112 };
 113
 114 struct schan_transport
 115 {
 116     struct schan_context *ctx;
 117     struct schan_buffers in;
 118     struct schan_buffers out;
 119     BOOL no_incomplete_pull;
 120 };
 121
 122 static struct schan_handle *schan_handle_table;
 123 static struct schan_handle *schan_free_handles;
 124 static SIZE_T schan_handle_table_size;
 125 static SIZE_T schan_handle_count;
 126
 127 static ULONG_PTR schan_alloc_handle(void *object, enum schan_handle_type type)
 128 {
 129     struct schan_handle *handle;
 130
 131     if (schan_free_handles)
 132     {
 133         DWORD index = schan_free_handles - schan_handle_table;
 134         /* Use a free handle */
 135         handle = schan_free_handles;
 136         if (handle->type != SCHAN_HANDLE_FREE)
 137         {
 138             ERR("Handle %d(%p) is in the free list, but has type %#x.\n", index, handle, handle->type);
 139             return SCHAN_INVALID_HANDLE;
 140         }
 141         schan_free_handles = handle->object;
 142         handle->object = object;
 143         handle->type = type;
 144
 145         return index;
 146     }
 147     if (!(schan_handle_count < schan_handle_table_size))
 148     {
 149         /* Grow the table */
 150         SIZE_T new_size = schan_handle_table_size + (schan_handle_table_size >> 1);
 151         struct schan_handle *new_table = HeapReAlloc(GetProcessHeap(), 0, schan_handle_table, new_size * sizeof(*schan_handle_table));
 152         if (!new_table)
 153         {
 154             ERR("Failed to grow the handle table\n");
 155             return SCHAN_INVALID_HANDLE;
 156         }
 157         schan_handle_table = new_table;
 158         schan_handle_table_size = new_size;
 159     }
 160
 161     handle = &schan_handle_table[schan_handle_count++];
 162     handle->object = object;
 163     handle->type = type;
 164
 165     return handle - schan_handle_table;
 166 }
 167
 168 static void *schan_free_handle(ULONG_PTR handle_idx, enum schan_handle_type type)
 169 {
 170     struct schan_handle *handle;
 171     void *object;
 172
 173     if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
 174     if (handle_idx >= schan_handle_count) return NULL;
 175     handle = &schan_handle_table[handle_idx];
 176     if (handle->type != type)
 177     {
 178         ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
 179         return NULL;
 180     }
 181
 182     object = handle->object;
 183     handle->object = schan_free_handles;
 184     handle->type = SCHAN_HANDLE_FREE;
 185     schan_free_handles = handle;
 186
 187     return object;
 188 }
 189
 190 static void *schan_get_object(ULONG_PTR handle_idx, enum schan_handle_type type)
 191 {
 192     struct schan_handle *handle;
 193
 194     if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
 195     if (handle_idx >= schan_handle_count) return NULL;
 196     handle = &schan_handle_table[handle_idx];
 197     if (handle->type != type)
 198     {
 199         ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
 200         return NULL;
 201     }
 202
 203     return handle->object;
 204 }
 205
 206 static SECURITY_STATUS schan_QueryCredentialsAttributes(
 207  PCredHandle phCredential, ULONG ulAttribute, VOID *pBuffer)
 208 {
 209     SECURITY_STATUS ret;
 210
 211     switch (ulAttribute)
 212     {
 213     case SECPKG_ATTR_SUPPORTED_ALGS:
 214         if (pBuffer)
 215         {
 216             /* FIXME: get from CryptoAPI */
 217             FIXME("SECPKG_ATTR_SUPPORTED_ALGS: stub\n");
 218             ret = SEC_E_UNSUPPORTED_FUNCTION;
 219         }
 220         else
 221             ret = SEC_E_INTERNAL_ERROR;
 222         break;
 223     case SECPKG_ATTR_CIPHER_STRENGTHS:
 224         if (pBuffer)
 225         {
 226             SecPkgCred_CipherStrengths *r = pBuffer;
 227
 228             /* FIXME: get from CryptoAPI */
 229             FIXME("SECPKG_ATTR_CIPHER_STRENGTHS: semi-stub\n");
 230             r->dwMinimumCipherStrength = 40;
 231             r->dwMaximumCipherStrength = 168;
 232             ret = SEC_E_OK;
 233         }
 234         else
 235             ret = SEC_E_INTERNAL_ERROR;
 236         break;
 237     case SECPKG_ATTR_SUPPORTED_PROTOCOLS:
 238         if (pBuffer)
 239         {
 240             /* FIXME: get from OpenSSL? */
 241             FIXME("SECPKG_ATTR_SUPPORTED_PROTOCOLS: stub\n");
 242             ret = SEC_E_UNSUPPORTED_FUNCTION;
 243         }
 244         else
 245             ret = SEC_E_INTERNAL_ERROR;
 246         break;
 247     default:
 248         ret = SEC_E_UNSUPPORTED_FUNCTION;
 249     }
 250     return ret;
 251 }
 252
 253 static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesA(
 254  PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
 255 {
 256     SECURITY_STATUS ret;
 257
 258     TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
 259
 260     switch (ulAttribute)
 261     {
 262     case SECPKG_CRED_ATTR_NAMES:
 263         FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
 264         ret = SEC_E_UNSUPPORTED_FUNCTION;
 265         break;
 266     default:
 267         ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
 268          pBuffer);
 269     }
 270     return ret;
 271 }
 272
 273 static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesW(
 274  PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
 275 {
 276     SECURITY_STATUS ret;
 277
 278     TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
 279
 280     switch (ulAttribute)
 281     {
 282     case SECPKG_CRED_ATTR_NAMES:
 283         FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
 284         ret = SEC_E_UNSUPPORTED_FUNCTION;
 285         break;
 286     default:
 287         ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
 288          pBuffer);
 289     }
 290     return ret;
 291 }
 292
 293 static SECURITY_STATUS schan_CheckCreds(const SCHANNEL_CRED *schanCred)
 294 {
 295     SECURITY_STATUS st;
 296     DWORD i;
 297
 298     TRACE("dwVersion = %d\n", schanCred->dwVersion);
 299     TRACE("cCreds = %d\n", schanCred->cCreds);
 300     TRACE("hRootStore = %p\n", schanCred->hRootStore);
 301     TRACE("cMappers = %d\n", schanCred->cMappers);
 302     TRACE("cSupportedAlgs = %d:\n", schanCred->cSupportedAlgs);
 303     for (i = 0; i < schanCred->cSupportedAlgs; i++)
 304         TRACE("%08x\n", schanCred->palgSupportedAlgs[i]);
 305     TRACE("grbitEnabledProtocols = %08x\n", schanCred->grbitEnabledProtocols);
 306     TRACE("dwMinimumCipherStrength = %d\n", schanCred->dwMinimumCipherStrength);
 307     TRACE("dwMaximumCipherStrength = %d\n", schanCred->dwMaximumCipherStrength);
 308     TRACE("dwSessionLifespan = %d\n", schanCred->dwSessionLifespan);
 309     TRACE("dwFlags = %08x\n", schanCred->dwFlags);
 310     TRACE("dwCredFormat = %d\n", schanCred->dwCredFormat);
 311
 312     switch (schanCred->dwVersion)
 313     {
 314     case SCH_CRED_V3:
 315     case SCHANNEL_CRED_VERSION:
 316         break;
 317     default:
 318         return SEC_E_INTERNAL_ERROR;
 319     }
 320
 321     if (schanCred->cCreds == 0)
 322         st = SEC_E_NO_CREDENTIALS;
 323     else if (schanCred->cCreds > 1)
 324         st = SEC_E_UNKNOWN_CREDENTIALS;
 325     else
 326     {
 327         DWORD keySpec;
 328         HCRYPTPROV csp;
 329         BOOL ret, freeCSP;
 330
 331         ret = CryptAcquireCertificatePrivateKey(schanCred->paCred[0],
 332          0, /* FIXME: what flags to use? */ NULL,
 333          &csp, &keySpec, &freeCSP);
 334         if (ret)
 335         {
 336             st = SEC_E_OK;
 337             if (freeCSP)
 338                 CryptReleaseContext(csp, 0);
 339         }
 340         else
 341             st = SEC_E_UNKNOWN_CREDENTIALS;
 342     }
 343     return st;
 344 }
 345
 346 static SECURITY_STATUS schan_AcquireClientCredentials(const SCHANNEL_CRED *schanCred,
 347  PCredHandle phCredential, PTimeStamp ptsExpiry)
 348 {
 349     struct schan_credentials *creds;
 350     SECURITY_STATUS st = SEC_E_OK;
 351
 352     TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
 353
 354     if (schanCred)
 355     {
 356         st = schan_CheckCreds(schanCred);
 357         if (st == SEC_E_NO_CREDENTIALS)
 358             st = SEC_E_OK;
 359     }
 360
 361     /* For now, the only thing I'm interested in is the direction of the
 362      * connection, so just store it.
 363      */
 364     if (st == SEC_E_OK)
 365     {
 366         ULONG_PTR handle;
 367         int ret;
 368
 369         creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
 370         if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
 371
 372         handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
 373         if (handle == SCHAN_INVALID_HANDLE) goto fail;
 374
 375         creds->credential_use = SECPKG_CRED_OUTBOUND;
 376         ret = pgnutls_certificate_allocate_credentials(&creds->credentials);
 377         if (ret != GNUTLS_E_SUCCESS)
 378         {
 379             pgnutls_perror(ret);
 380             schan_free_handle(handle, SCHAN_HANDLE_CRED);
 381             goto fail;
 382         }
 383
 384         phCredential->dwLower = handle;
 385         phCredential->dwUpper = 0;
 386
 387         /* Outbound credentials have no expiry */
 388         if (ptsExpiry)
 389         {
 390             ptsExpiry->LowPart = 0;
 391             ptsExpiry->HighPart = 0;
 392         }
 393     }
 394     return st;
 395
 396 fail:
 397     HeapFree(GetProcessHeap(), 0, creds);
 398     return SEC_E_INTERNAL_ERROR;
 399 }
 400
 401 static SECURITY_STATUS schan_AcquireServerCredentials(const SCHANNEL_CRED *schanCred,
 402  PCredHandle phCredential, PTimeStamp ptsExpiry)
 403 {
 404     SECURITY_STATUS st;
 405
 406     TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
 407
 408     if (!schanCred) return SEC_E_NO_CREDENTIALS;
 409
 410     st = schan_CheckCreds(schanCred);
 411     if (st == SEC_E_OK)
 412     {
 413         ULONG_PTR handle;
 414         struct schan_credentials *creds;
 415
 416         creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
 417         if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
 418         creds->credential_use = SECPKG_CRED_INBOUND;
 419
 420         handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
 421         if (handle == SCHAN_INVALID_HANDLE)
 422         {
 423             HeapFree(GetProcessHeap(), 0, creds);
 424             return SEC_E_INTERNAL_ERROR;
 425         }
 426
 427         phCredential->dwLower = handle;
 428         phCredential->dwUpper = 0;
 429
 430         /* FIXME: get expiry from cert */
 431     }
 432     return st;
 433 }
 434
 435 static SECURITY_STATUS schan_AcquireCredentialsHandle(ULONG fCredentialUse,
 436  const SCHANNEL_CRED *schanCred, PCredHandle phCredential, PTimeStamp ptsExpiry)
 437 {
 438     SECURITY_STATUS ret;
 439
 440     if (fCredentialUse == SECPKG_CRED_OUTBOUND)
 441         ret = schan_AcquireClientCredentials(schanCred, phCredential,
 442          ptsExpiry);
 443     else
 444         ret = schan_AcquireServerCredentials(schanCred, phCredential,
 445          ptsExpiry);
 446     return ret;
 447 }
 448
 449 static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleA(
 450  SEC_CHAR *pszPrincipal, SEC_CHAR *pszPackage, ULONG fCredentialUse,
 451  PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
 452  PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
 453 {
 454     TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
 455      debugstr_a(pszPrincipal), debugstr_a(pszPackage), fCredentialUse,
 456      pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
 457     return schan_AcquireCredentialsHandle(fCredentialUse,
 458      pAuthData, phCredential, ptsExpiry);
 459 }
 460
 461 static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleW(
 462  SEC_WCHAR *pszPrincipal, SEC_WCHAR *pszPackage, ULONG fCredentialUse,
 463  PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
 464  PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
 465 {
 466     TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
 467      debugstr_w(pszPrincipal), debugstr_w(pszPackage), fCredentialUse,
 468      pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
 469     return schan_AcquireCredentialsHandle(fCredentialUse,
 470      pAuthData, phCredential, ptsExpiry);
 471 }
 472
 473 static SECURITY_STATUS SEC_ENTRY schan_FreeCredentialsHandle(
 474  PCredHandle phCredential)
 475 {
 476     struct schan_credentials *creds;
 477
 478     TRACE("phCredential %p\n", phCredential);
 479
 480     if (!phCredential) return SEC_E_INVALID_HANDLE;
 481
 482     creds = schan_free_handle(phCredential->dwLower, SCHAN_HANDLE_CRED);
 483     if (!creds) return SEC_E_INVALID_HANDLE;
 484
 485     if (creds->credential_use == SECPKG_CRED_OUTBOUND)
 486         pgnutls_certificate_free_credentials(creds->credentials);
 487     HeapFree(GetProcessHeap(), 0, creds);
 488
 489     return SEC_E_OK;
 490 }
 491
 492 static void init_schan_buffers(struct schan_buffers *s, const PSecBufferDesc desc,
 493         int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *))
 494 {
 495     s->offset = 0;
 496     s->desc = desc;
 497     s->current_buffer_idx = -1;
 498     s->allow_buffer_resize = FALSE;
 499     s->get_next_buffer = get_next_buffer;
 500 }
 501
 502 static int schan_find_sec_buffer_idx(const SecBufferDesc *desc, unsigned int start_idx, ULONG buffer_type)
 503 {
 504     unsigned int i;
 505     PSecBuffer buffer;
 506
 507     for (i = start_idx; i < desc->cBuffers; ++i)
 508     {
 509         buffer = &desc->pBuffers[i];
 510         if (buffer->BufferType == buffer_type) return i;
 511     }
 512
 513     return -1;
 514 }
 515
 516 static void schan_resize_current_buffer(const struct schan_buffers *s, SIZE_T min_size)
 517 {
 518     SecBuffer *b = &s->desc->pBuffers[s->current_buffer_idx];
 519     SIZE_T new_size = b->cbBuffer ? b->cbBuffer * 2 : 128;
 520     void *new_data;
 521
 522     if (b->cbBuffer >= min_size || !s->allow_buffer_resize || min_size > UINT_MAX / 2) return;
 523
 524     while (new_size < min_size) new_size *= 2;
 525
 526     if (b->pvBuffer)
 527         new_data = HeapReAlloc(GetProcessHeap(), 0, b->pvBuffer, new_size);
 528     else
 529         new_data = HeapAlloc(GetProcessHeap(), 0, new_size);
 530
 531     if (!new_data)
 532     {
 533         TRACE("Failed to resize %p from %d to %ld\n", b->pvBuffer, b->cbBuffer, new_size);
 534         return;
 535     }
 536
 537     b->cbBuffer = new_size;
 538     b->pvBuffer = new_data;
 539 }
 540
 541 static char *schan_get_buffer(const struct schan_transport *t, struct schan_buffers *s, size_t *count)
 542 {
 543     SIZE_T max_count;
 544     PSecBuffer buffer;
 545
 546     if (!s->desc)
 547     {
 548         TRACE("No desc\n");
 549         return NULL;
 550     }
 551
 552     if (s->current_buffer_idx == -1)
 553     {
 554         /* Initial buffer */
 555         int buffer_idx = s->get_next_buffer(t, s);
 556         if (buffer_idx == -1)
 557         {
 558             TRACE("No next buffer\n");
 559             return NULL;
 560         }
 561         s->current_buffer_idx = buffer_idx;
 562     }
 563
 564     buffer = &s->desc->pBuffers[s->current_buffer_idx];
 565     TRACE("Using buffer %d: cbBuffer %d, BufferType %#x, pvBuffer %p\n", s->current_buffer_idx, buffer->cbBuffer, buffer->BufferType, buffer->pvBuffer);
 566
 567     schan_resize_current_buffer(s, s->offset + *count);
 568     max_count = buffer->cbBuffer - s->offset;
 569     if (!max_count)
 570     {
 571         int buffer_idx;
 572
 573         s->allow_buffer_resize = FALSE;
 574         buffer_idx = s->get_next_buffer(t, s);
 575         if (buffer_idx == -1)
 576         {
 577             TRACE("No next buffer\n");
 578             return NULL;
 579         }
 580         s->current_buffer_idx = buffer_idx;
 581         s->offset = 0;
 582         return schan_get_buffer(t, s, count);
 583     }
 584
 585     if (*count > max_count) *count = max_count;
 586     return (char *)buffer->pvBuffer + s->offset;
 587 }
 588
 589 static ssize_t schan_pull(gnutls_transport_ptr_t transport, void *buff, size_t buff_len)
 590 {
 591     struct schan_transport *t = transport;
 592     char *b;
 593     size_t req_len = buff_len;
 594
 595     TRACE("Pull %zu bytes\n", buff_len);
 596
 597     b = schan_get_buffer(t, &t->in, &buff_len);
 598     if (!b || (t->no_incomplete_pull && req_len != buff_len))
 599     {
 600         pgnutls_transport_set_errno(t->ctx->session, EAGAIN);
 601         return -1;
 602     }
 603
 604     memcpy(buff, b, buff_len);
 605     t->in.offset += buff_len;
 606
 607     TRACE("Read %zu bytes\n", buff_len);
 608
 609     return buff_len;
 610 }
 611
 612 static ssize_t schan_push(gnutls_transport_ptr_t transport, const void *buff, size_t buff_len)
 613 {
 614     struct schan_transport *t = transport;
 615     char *b;
 616
 617     TRACE("Push %zu bytes\n", buff_len);
 618
 619     b = schan_get_buffer(t, &t->out, &buff_len);
 620     if (!b)
 621     {
 622         pgnutls_transport_set_errno(t->ctx->session, EAGAIN);
 623         return -1;
 624     }
 625
 626     memcpy(b, buff, buff_len);
 627     t->out.offset += buff_len;
 628
 629     TRACE("Wrote %zu bytes\n", buff_len);
 630
 631     return buff_len;
 632 }
 633
 634 static int schan_init_sec_ctx_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
 635 {
 636     if (s->current_buffer_idx == -1)
 637     {
 638         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
 639         if (t->ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
 640         {
 641             if (idx == -1)
 642             {
 643                 idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_EMPTY);
 644                 if (idx != -1) s->desc->pBuffers[idx].BufferType = SECBUFFER_TOKEN;
 645             }
 646             if (idx != -1 && !s->desc->pBuffers[idx].pvBuffer)
 647             {
 648                 s->desc->pBuffers[idx].cbBuffer = 0;
 649                 s->allow_buffer_resize = TRUE;
 650             }
 651         }
 652         return idx;
 653     }
 654
 655     return -1;
 656 }
 657
 658 static void dump_buffer_desc(SecBufferDesc *desc)
 659 {
 660     unsigned int i;
 661
 662     if (!desc) return;
 663     TRACE("Buffer desc %p:\n", desc);
 664     for (i = 0; i < desc->cBuffers; ++i)
 665     {
 666         SecBuffer *b = &desc->pBuffers[i];
 667         TRACE("\tbuffer %u: cbBuffer %d, BufferType %#x pvBuffer %p\n", i, b->cbBuffer, b->BufferType, b->pvBuffer);
 668     }
 669 }
 670
 671 /***********************************************************************
 672  *              InitializeSecurityContextW
 673  */
 674 static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextW(
 675  PCredHandle phCredential, PCtxtHandle phContext, SEC_WCHAR *pszTargetName,
 676  ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
 677  PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
 678  PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
 679 {
 680     struct schan_context *ctx;
 681     struct schan_buffers *out_buffers;
 682     struct schan_credentials *cred;
 683     struct schan_transport transport;
 684     int err;
 685
 686     TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
 687      debugstr_w(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
 688      Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
 689
 690     dump_buffer_desc(pInput);
 691     dump_buffer_desc(pOutput);
 692
 693     if (!phContext)
 694     {
 695         ULONG_PTR handle;
 696
 697         if (!phCredential) return SEC_E_INVALID_HANDLE;
 698
 699         cred = schan_get_object(phCredential->dwLower, SCHAN_HANDLE_CRED);
 700         if (!cred) return SEC_E_INVALID_HANDLE;
 701
 702         if (!(cred->credential_use & SECPKG_CRED_OUTBOUND))
 703         {
 704             WARN("Invalid credential use %#x\n", cred->credential_use);
 705             return SEC_E_INVALID_HANDLE;
 706         }
 707
 708         ctx = HeapAlloc(GetProcessHeap(), 0, sizeof(*ctx));
 709         if (!ctx) return SEC_E_INSUFFICIENT_MEMORY;
 710
 711         handle = schan_alloc_handle(ctx, SCHAN_HANDLE_CTX);
 712         if (handle == SCHAN_INVALID_HANDLE)
 713         {
 714             HeapFree(GetProcessHeap(), 0, ctx);
 715             return SEC_E_INTERNAL_ERROR;
 716         }
 717
 718         err = pgnutls_init(&ctx->session, GNUTLS_CLIENT);
 719         if (err != GNUTLS_E_SUCCESS)
 720         {
 721             pgnutls_perror(err);
 722             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 723             HeapFree(GetProcessHeap(), 0, ctx);
 724             return SEC_E_INTERNAL_ERROR;
 725         }
 726
 727         /* FIXME: We should be using the information from the credentials here. */
 728         FIXME("Using hardcoded \"NORMAL\" priority\n");
 729         err = pgnutls_set_default_priority(ctx->session);
 730         if (err != GNUTLS_E_SUCCESS)
 731         {
 732             pgnutls_perror(err);
 733             pgnutls_deinit(ctx->session);
 734             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 735             HeapFree(GetProcessHeap(), 0, ctx);
 736         }
 737
 738         err = pgnutls_credentials_set(ctx->session, GNUTLS_CRD_CERTIFICATE, cred->credentials);
 739         if (err != GNUTLS_E_SUCCESS)
 740         {
 741             pgnutls_perror(err);
 742             pgnutls_deinit(ctx->session);
 743             schan_free_handle(handle, SCHAN_HANDLE_CTX);
 744             HeapFree(GetProcessHeap(), 0, ctx);
 745         }
 746
 747         pgnutls_transport_set_pull_function(ctx->session, schan_pull);
 748         pgnutls_transport_set_push_function(ctx->session, schan_push);
 749
 750         phNewContext->dwLower = handle;
 751         phNewContext->dwUpper = 0;
 752     }
 753     else
 754     {
 755         ctx = schan_get_object(phContext->dwLower, SCHAN_HANDLE_CTX);
 756     }
 757
 758     ctx->req_ctx_attr = fContextReq;
 759
 760     transport.ctx = ctx;
 761     transport.no_incomplete_pull = FALSE;
 762     init_schan_buffers(&transport.in, pInput, schan_init_sec_ctx_get_next_buffer);
 763     init_schan_buffers(&transport.out, pOutput, schan_init_sec_ctx_get_next_buffer);
 764     pgnutls_transport_set_ptr(ctx->session, &transport);
 765
 766     /* Perform the TLS handshake */
 767     err = pgnutls_handshake(ctx->session);
 768
 769     out_buffers = &transport.out;
 770     if (out_buffers->current_buffer_idx != -1)
 771     {
 772         SecBuffer *buffer = &out_buffers->desc->pBuffers[out_buffers->current_buffer_idx];
 773         buffer->cbBuffer = out_buffers->offset;
 774     }
 775
 776     *pfContextAttr = 0;
 777     if (ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
 778         *pfContextAttr |= ISC_RET_ALLOCATED_MEMORY;
 779
 780     switch(err)
 781     {
 782         case GNUTLS_E_SUCCESS:
 783             TRACE("Handshake completed\n");
 784             return SEC_E_OK;
 785
 786         case GNUTLS_E_AGAIN:
 787             TRACE("Continue...\n");
 788             return SEC_I_CONTINUE_NEEDED;
 789
 790         case GNUTLS_E_WARNING_ALERT_RECEIVED:
 791         case GNUTLS_E_FATAL_ALERT_RECEIVED:
 792         {
 793             gnutls_alert_description_t alert = pgnutls_alert_get(ctx->session);
 794             const char *alert_name = pgnutls_alert_get_name(alert);
 795             WARN("ALERT: %d %s\n", alert, alert_name);
 796             return SEC_E_INTERNAL_ERROR;
 797         }
 798
 799         default:
 800             pgnutls_perror(err);
 801             return SEC_E_INTERNAL_ERROR;
 802     }
 803 }
 804
 805 /***********************************************************************
 806  *              InitializeSecurityContextA
 807  */
 808 static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextA(
 809  PCredHandle phCredential, PCtxtHandle phContext, SEC_CHAR *pszTargetName,
 810  ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
 811  PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
 812  PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
 813 {
 814     SECURITY_STATUS ret;
 815     SEC_WCHAR *target_name = NULL;
 816
 817     TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
 818      debugstr_a(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
 819      Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
 820
 821     if (pszTargetName)
 822     {
 823         INT len = MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, NULL, 0);
 824         target_name = HeapAlloc(GetProcessHeap(), 0, len * sizeof(*target_name));
 825         MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, target_name, len);
 826     }
 827
 828     ret = schan_InitializeSecurityContextW(phCredential, phContext, target_name,
 829             fContextReq, Reserved1, TargetDataRep, pInput, Reserved2,
 830             phNewContext, pOutput, pfContextAttr, ptsExpiry);
 831
 832     HeapFree(GetProcessHeap(), 0, target_name);
 833
 834     return ret;
 835 }
 836
 837 static unsigned int schannel_get_cipher_block_size(gnutls_cipher_algorithm_t cipher)
 838 {
 839     const struct
 840     {
 841         gnutls_cipher_algorithm_t cipher;
 842         unsigned int block_size;
 843     }
 844     algorithms[] =
 845     {
 846         {GNUTLS_CIPHER_3DES_CBC, 8},
 847         {GNUTLS_CIPHER_AES_128_CBC, 16},
 848         {GNUTLS_CIPHER_AES_256_CBC, 16},
 849         {GNUTLS_CIPHER_ARCFOUR_128, 1},
 850         {GNUTLS_CIPHER_ARCFOUR_40, 1},
 851         {GNUTLS_CIPHER_DES_CBC, 8},
 852         {GNUTLS_CIPHER_NULL, 1},
 853         {GNUTLS_CIPHER_RC2_40_CBC, 8},
 854     };
 855     unsigned int i;
 856
 857     for (i = 0; i < sizeof(algorithms) / sizeof(*algorithms); ++i)
 858     {
 859         if (algorithms[i].cipher == cipher)
 860             return algorithms[i].block_size;
 861     }
 862
 863     FIXME("Unknown cipher %#x, returning 1\n", cipher);
 864
 865     return 1;
 866 }
 867
 868 static DWORD schannel_get_protocol(gnutls_protocol_t proto)
 869 {
 870     /* FIXME: currently schannel only implements client connections, but
 871      * there's no reason it couldn't be used for servers as well.  The
 872      * context doesn't tell us which it is, so assume client for now.
 873      */
 874     switch (proto)
 875     {
 876     case GNUTLS_SSL3: return SP_PROT_SSL3_CLIENT;
 877     case GNUTLS_TLS1_0: return SP_PROT_TLS1_CLIENT;
 878     default:
 879         FIXME("unknown protocol %d\n", proto);
 880         return 0;
 881     }
 882 }
 883
 884 static ALG_ID schannel_get_cipher_algid(gnutls_cipher_algorithm_t cipher)
 885 {
 886     switch (cipher)
 887     {
 888     case GNUTLS_CIPHER_UNKNOWN:
 889     case GNUTLS_CIPHER_NULL: return 0;
 890     case GNUTLS_CIPHER_ARCFOUR_40:
 891     case GNUTLS_CIPHER_ARCFOUR_128: return CALG_RC4;
 892     case GNUTLS_CIPHER_DES_CBC:
 893     case GNUTLS_CIPHER_3DES_CBC: return CALG_DES;
 894     case GNUTLS_CIPHER_AES_128_CBC:
 895     case GNUTLS_CIPHER_AES_256_CBC: return CALG_AES;
 896     case GNUTLS_CIPHER_RC2_40_CBC: return CALG_RC2;
 897     default:
 898         FIXME("unknown algorithm %d\n", cipher);
 899         return 0;
 900     }
 901 }
 902
 903 static ALG_ID schannel_get_mac_algid(gnutls_mac_algorithm_t mac)
 904 {
 905     switch (mac)
 906     {
 907     case GNUTLS_MAC_UNKNOWN:
 908     case GNUTLS_MAC_NULL: return 0;
 909     case GNUTLS_MAC_MD5: return CALG_MD5;
 910     case GNUTLS_MAC_SHA1:
 911     case GNUTLS_MAC_SHA256:
 912     case GNUTLS_MAC_SHA384:
 913     case GNUTLS_MAC_SHA512: return CALG_SHA;
 914     default:
 915         FIXME("unknown algorithm %d\n", mac);
 916         return 0;
 917     }
 918 }
 919
 920 static ALG_ID schannel_get_kx_algid(gnutls_kx_algorithm_t kx)
 921 {
 922     switch (kx)
 923     {
 924         case GNUTLS_KX_RSA: return CALG_RSA_KEYX;
 925         case GNUTLS_KX_DHE_DSS:
 926         case GNUTLS_KX_DHE_RSA: return CALG_DH_EPHEM;
 927     default:
 928         FIXME("unknown algorithm %d\n", kx);
 929         return 0;
 930     }
 931 }
 932
 933 static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesW(
 934         PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
 935 {
 936     struct schan_context *ctx;
 937
 938     TRACE("context_handle %p, attribute %#x, buffer %p\n",
 939             context_handle, attribute, buffer);
 940
 941     if (!context_handle) return SEC_E_INVALID_HANDLE;
 942     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
 943
 944     switch(attribute)
 945     {
 946         case SECPKG_ATTR_STREAM_SIZES:
 947         {
 948             SecPkgContext_StreamSizes *stream_sizes = buffer;
 949             gnutls_mac_algorithm_t mac = pgnutls_mac_get(ctx->session);
 950             size_t mac_size = pgnutls_mac_get_key_size(mac);
 951             gnutls_cipher_algorithm_t cipher = pgnutls_cipher_get(ctx->session);
 952             unsigned int block_size = schannel_get_cipher_block_size(cipher);
 953
 954             TRACE("Using %zu mac bytes, block size %u\n", mac_size, block_size);
 955
 956             /* These are defined by the TLS RFC */
 957             stream_sizes->cbHeader = 5;
 958             stream_sizes->cbTrailer = mac_size + 256; /* Max 255 bytes padding + 1 for padding size */
 959             stream_sizes->cbMaximumMessage = 1 << 14;
 960             stream_sizes->cbBuffers = 4;
 961             stream_sizes->cbBlockSize = block_size;
 962             return SEC_E_OK;
 963         }
 964         case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
 965         {
 966             unsigned int list_size;
 967             const gnutls_datum_t *datum;
 968
 969             datum = pgnutls_certificate_get_peers(ctx->session, &list_size);
 970             if (datum)
 971             {
 972                 PCCERT_CONTEXT *cert = buffer;
 973
 974                 *cert = CertCreateCertificateContext(X509_ASN_ENCODING,
 975                         datum->data, datum->size);
 976                 if (!*cert)
 977                     return GetLastError();
 978                 else
 979                     return SEC_E_OK;
 980             }
 981             else
 982                 return SEC_E_INTERNAL_ERROR;
 983         }
 984         case SECPKG_ATTR_CONNECTION_INFO:
 985         {
 986             SecPkgContext_ConnectionInfo *info = buffer;
 987             gnutls_protocol_t proto = pgnutls_protocol_get_version(ctx->session);
 988             gnutls_cipher_algorithm_t alg = pgnutls_cipher_get(ctx->session);
 989             gnutls_mac_algorithm_t mac = pgnutls_mac_get(ctx->session);
 990             gnutls_kx_algorithm_t kx = pgnutls_kx_get(ctx->session);
 991
 992             info->dwProtocol = schannel_get_protocol(proto);
 993             info->aiCipher = schannel_get_cipher_algid(alg);
 994             info->dwCipherStrength = pgnutls_cipher_get_key_size(alg);
 995             info->aiHash = schannel_get_mac_algid(mac);
 996             info->dwHashStrength = pgnutls_mac_get_key_size(mac);
 997             info->aiExch = schannel_get_kx_algid(kx);
 998             /* FIXME: info->dwExchStrength? */
 999             info->dwExchStrength = 0;
1000             return SEC_E_OK;
1001         }
1002
1003         default:
1004             FIXME("Unhandled attribute %#x\n", attribute);
1005             return SEC_E_UNSUPPORTED_FUNCTION;
1006     }
1007 }
1008
1009 static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesA(
1010         PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
1011 {
1012     TRACE("context_handle %p, attribute %#x, buffer %p\n",
1013             context_handle, attribute, buffer);
1014
1015     switch(attribute)
1016     {
1017         case SECPKG_ATTR_STREAM_SIZES:
1018             return schan_QueryContextAttributesW(context_handle, attribute, buffer);
1019         case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
1020             return schan_QueryContextAttributesW(context_handle, attribute, buffer);
1021         case SECPKG_ATTR_CONNECTION_INFO:
1022             return schan_QueryContextAttributesW(context_handle, attribute, buffer);
1023
1024         default:
1025             FIXME("Unhandled attribute %#x\n", attribute);
1026             return SEC_E_UNSUPPORTED_FUNCTION;
1027     }
1028 }
1029
1030 static int schan_encrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
1031 {
1032     SecBuffer *b;
1033
1034     if (s->current_buffer_idx == -1)
1035         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_HEADER);
1036
1037     b = &s->desc->pBuffers[s->current_buffer_idx];
1038
1039     if (b->BufferType == SECBUFFER_STREAM_HEADER)
1040         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
1041
1042     if (b->BufferType == SECBUFFER_DATA)
1043         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_TRAILER);
1044
1045     return -1;
1046 }
1047
1048 static int schan_encrypt_message_get_next_buffer_token(const struct schan_transport *t, struct schan_buffers *s)
1049 {
1050     SecBuffer *b;
1051
1052     if (s->current_buffer_idx == -1)
1053         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
1054
1055     b = &s->desc->pBuffers[s->current_buffer_idx];
1056
1057     if (b->BufferType == SECBUFFER_TOKEN)
1058     {
1059         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
1060         if (idx != s->current_buffer_idx) return -1;
1061         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
1062     }
1063
1064     if (b->BufferType == SECBUFFER_DATA)
1065     {
1066         int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
1067         if (idx != -1)
1068             idx = schan_find_sec_buffer_idx(s->desc, idx + 1, SECBUFFER_TOKEN);
1069         return idx;
1070     }
1071
1072     return -1;
1073 }
1074
1075 static SECURITY_STATUS SEC_ENTRY schan_EncryptMessage(PCtxtHandle context_handle,
1076         ULONG quality, PSecBufferDesc message, ULONG message_seq_no)
1077 {
1078     struct schan_transport transport;
1079     struct schan_context *ctx;
1080     struct schan_buffers *b;
1081     SecBuffer *buffer;
1082     SIZE_T data_size;
1083     char *data;
1084     ssize_t sent = 0;
1085     ssize_t ret;
1086     int idx;
1087
1088     TRACE("context_handle %p, quality %d, message %p, message_seq_no %d\n",
1089             context_handle, quality, message, message_seq_no);
1090
1091     if (!context_handle) return SEC_E_INVALID_HANDLE;
1092     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
1093
1094     dump_buffer_desc(message);
1095
1096     idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
1097     if (idx == -1)
1098     {
1099         WARN("No data buffer passed\n");
1100         return SEC_E_INTERNAL_ERROR;
1101     }
1102     buffer = &message->pBuffers[idx];
1103
1104     data_size = buffer->cbBuffer;
1105     data = HeapAlloc(GetProcessHeap(), 0, data_size);
1106     memcpy(data, buffer->pvBuffer, data_size);
1107
1108     transport.ctx = ctx;
1109     transport.no_incomplete_pull = FALSE;
1110     init_schan_buffers(&transport.in, NULL, NULL);
1111     if (schan_find_sec_buffer_idx(message, 0, SECBUFFER_STREAM_HEADER) != -1)
1112         init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer);
1113     else
1114         init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer_token);
1115     pgnutls_transport_set_ptr(ctx->session, &transport);
1116
1117     while (sent < data_size)
1118     {
1119         ret = pgnutls_record_send(ctx->session, data + sent, data_size - sent);
1120         if (ret < 0)
1121         {
1122             if (ret != GNUTLS_E_AGAIN)
1123             {
1124                 pgnutls_perror(ret);
1125                 HeapFree(GetProcessHeap(), 0, data);
1126                 ERR("Returning SEC_E_INTERNAL_ERROR\n");
1127                 return SEC_E_INTERNAL_ERROR;
1128             }
1129             else break;
1130         }
1131         sent += ret;
1132     }
1133
1134     TRACE("Sent %zd bytes\n", sent);
1135
1136     b = &transport.out;
1137     b->desc->pBuffers[b->current_buffer_idx].cbBuffer = b->offset;
1138     HeapFree(GetProcessHeap(), 0, data);
1139
1140     return SEC_E_OK;
1141 }
1142
1143 static int schan_decrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
1144 {
1145     if (s->current_buffer_idx == -1)
1146         return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
1147
1148     return -1;
1149 }
1150
1151 static SECURITY_STATUS SEC_ENTRY schan_DecryptMessage(PCtxtHandle context_handle,
1152         PSecBufferDesc message, ULONG message_seq_no, PULONG quality)
1153 {
1154     struct schan_transport transport;
1155     struct schan_context *ctx;
1156     SecBuffer *buffer;
1157     SIZE_T data_size;
1158     char *data;
1159     ssize_t received = 0;
1160     ssize_t ret;
1161     int idx;
1162
1163     TRACE("context_handle %p, message %p, message_seq_no %d, quality %p\n",
1164             context_handle, message, message_seq_no, quality);
1165
1166     if (!context_handle) return SEC_E_INVALID_HANDLE;
1167     ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
1168
1169     dump_buffer_desc(message);
1170
1171     idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
1172     if (idx == -1)
1173     {
1174         WARN("No data buffer passed\n");
1175         return SEC_E_INTERNAL_ERROR;
1176     }
1177     buffer = &message->pBuffers[idx];
1178
1179     data_size = buffer->cbBuffer;
1180     data = HeapAlloc(GetProcessHeap(), 0, data_size);
1181
1182     transport.ctx = ctx;
1183     transport.no_incomplete_pull = TRUE;
1184     init_schan_buffers(&transport.in, message, schan_decrypt_message_get_next_buffer);
1185     init_schan_buffers(&transport.out, NULL, NULL);
1186     pgnutls_transport_set_ptr(ctx->session, (gnutls_transport_ptr_t)&transport);
1187
1188     while (received < data_size)
1189     {
1190         ret = pgnutls_record_recv(ctx->session, data + received, data_size - received);
1191         if (ret < 0)
1192         {
1193             if (ret == GNUTLS_E_AGAIN)
1194             {
1195                 if (!received)
1196                 {
1197                     pgnutls_perror(ret);
1198                     HeapFree(GetProcessHeap(), 0, data);
1199                     TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
1200                     return SEC_E_INCOMPLETE_MESSAGE;
1201                 }
1202                 break;
1203             }
1204             else
1205             {
1206                 pgnutls_perror(ret);
1207                 HeapFree(GetProcessHeap(), 0, data);
1208                 ERR("Returning SEC_E_INTERNAL_ERROR\n");
1209                 return SEC_E_INTERNAL_ERROR;
1210             }
1211         }
1212         else if (!ret)
1213             break;
1214
1215         received += ret;
1216     }
1217
1218     TRACE("Received %zd bytes\n", received);
1219
1220     if (transport.in.offset < data_size)
1221     {
1222         /* let the caller know about unprocessed data */
1223         SIZE_T extra = data_size - transport.in.offset;
1224         idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_EMPTY);
1225         if (idx == -1)
1226         {
1227             WARN("No empty buffer for extra data.\n");
1228             HeapFree(GetProcessHeap(), 0, data);
1229             return SEC_E_INTERNAL_ERROR;
1230         }
1231         message->pBuffers[idx].BufferType = SECBUFFER_EXTRA;
1232         message->pBuffers[idx].cbBuffer = extra;
1233         TRACE("An extra %ld bytes remain to be processed.\n", extra);
1234     }
1235
1236     memcpy(buffer->pvBuffer, data, received);
1237     buffer->cbBuffer = received;
1238     HeapFree(GetProcessHeap(), 0, data);
1239
1240     return SEC_E_OK;
1241 }
1242
1243 static SECURITY_STATUS SEC_ENTRY schan_DeleteSecurityContext(PCtxtHandle context_handle)
1244 {
1245     struct schan_context *ctx;
1246
1247     TRACE("context_handle %p\n", context_handle);
1248
1249     if (!context_handle) return SEC_E_INVALID_HANDLE;
1250
1251     ctx = schan_free_handle(context_handle->dwLower, SCHAN_HANDLE_CTX);
1252     if (!ctx) return SEC_E_INVALID_HANDLE;
1253
1254     pgnutls_deinit(ctx->session);
1255     HeapFree(GetProcessHeap(), 0, ctx);
1256
1257     return SEC_E_OK;
1258 }
1259
1260 static void schan_gnutls_log(int level, const char *msg)
1261 {
1262     TRACE("<%d> %s", level, msg);
1263 }
1264
1265 static const SecurityFunctionTableA schanTableA = {
1266     1,
1267     NULL, /* EnumerateSecurityPackagesA */
1268     schan_QueryCredentialsAttributesA,
1269     schan_AcquireCredentialsHandleA,
1270     schan_FreeCredentialsHandle,
1271     NULL, /* Reserved2 */
1272     schan_InitializeSecurityContextA,
1273     NULL, /* AcceptSecurityContext */
1274     NULL, /* CompleteAuthToken */
1275     schan_DeleteSecurityContext,
1276     NULL, /* ApplyControlToken */
1277     schan_QueryContextAttributesA,
1278     NULL, /* ImpersonateSecurityContext */
1279     NULL, /* RevertSecurityContext */
1280     NULL, /* MakeSignature */
1281     NULL, /* VerifySignature */
1282     FreeContextBuffer,
1283     NULL, /* QuerySecurityPackageInfoA */
1284     NULL, /* Reserved3 */
1285     NULL, /* Reserved4 */
1286     NULL, /* ExportSecurityContext */
1287     NULL, /* ImportSecurityContextA */
1288     NULL, /* AddCredentialsA */
1289     NULL, /* Reserved8 */
1290     NULL, /* QuerySecurityContextToken */
1291     schan_EncryptMessage,
1292     schan_DecryptMessage,
1293     NULL, /* SetContextAttributesA */
1294 };
1295
1296 static const SecurityFunctionTableW schanTableW = {
1297     1,
1298     NULL, /* EnumerateSecurityPackagesW */
1299     schan_QueryCredentialsAttributesW,
1300     schan_AcquireCredentialsHandleW,
1301     schan_FreeCredentialsHandle,
1302     NULL, /* Reserved2 */
1303     schan_InitializeSecurityContextW,
1304     NULL, /* AcceptSecurityContext */
1305     NULL, /* CompleteAuthToken */
1306     schan_DeleteSecurityContext,
1307     NULL, /* ApplyControlToken */
1308     schan_QueryContextAttributesW,
1309     NULL, /* ImpersonateSecurityContext */
1310     NULL, /* RevertSecurityContext */
1311     NULL, /* MakeSignature */
1312     NULL, /* VerifySignature */
1313     FreeContextBuffer,
1314     NULL, /* QuerySecurityPackageInfoW */
1315     NULL, /* Reserved3 */
1316     NULL, /* Reserved4 */
1317     NULL, /* ExportSecurityContext */
1318     NULL, /* ImportSecurityContextW */
1319     NULL, /* AddCredentialsW */
1320     NULL, /* Reserved8 */
1321     NULL, /* QuerySecurityContextToken */
1322     schan_EncryptMessage,
1323     schan_DecryptMessage,
1324     NULL, /* SetContextAttributesW */
1325 };
1326
1327 static const WCHAR schannelComment[] = { 'S','c','h','a','n','n','e','l',' ',
1328  'S','e','c','u','r','i','t','y',' ','P','a','c','k','a','g','e',0 };
1329 static const WCHAR schannelDllName[] = { 's','c','h','a','n','n','e','l','.','d','l','l',0 };
1330
1331 void SECUR32_initSchannelSP(void)
1332 {
1333     /* This is what Windows reports.  This shouldn't break any applications
1334      * even though the functions are missing, because the wrapper will
1335      * return SEC_E_UNSUPPORTED_FUNCTION if our function is NULL.
1336      */
1337     static const LONG caps =
1338         SECPKG_FLAG_INTEGRITY |
1339         SECPKG_FLAG_PRIVACY |
1340         SECPKG_FLAG_CONNECTION |
1341         SECPKG_FLAG_MULTI_REQUIRED |
1342         SECPKG_FLAG_EXTENDED_ERROR |
1343         SECPKG_FLAG_IMPERSONATION |
1344         SECPKG_FLAG_ACCEPT_WIN32_NAME |
1345         SECPKG_FLAG_STREAM;
1346     static const short version = 1;
1347     static const LONG maxToken = 16384;
1348     SEC_WCHAR *uniSPName = (SEC_WCHAR *)UNISP_NAME_W,
1349               *schannel = (SEC_WCHAR *)SCHANNEL_NAME_W;
1350     const SecPkgInfoW info[] = {
1351         { caps, version, UNISP_RPC_ID, maxToken, uniSPName, uniSPName },
1352         { caps, version, UNISP_RPC_ID, maxToken, schannel,
1353             (SEC_WCHAR *)schannelComment },
1354     };
1355     SecureProvider *provider;
1356     int ret;
1357
1358     libgnutls_handle = wine_dlopen(SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0);
1359     if (!libgnutls_handle)
1360     {
1361         WARN("Failed to load libgnutls.\n");
1362         return;
1363     }
1364
1365 #define LOAD_FUNCPTR(f) \
1366     if (!(p##f = wine_dlsym(libgnutls_handle, #f, NULL, 0))) \
1367     { \
1368         ERR("Failed to load %s\n", #f); \
1369         goto fail; \
1370     }
1371
1372     LOAD_FUNCPTR(gnutls_alert_get)
1373     LOAD_FUNCPTR(gnutls_alert_get_name)
1374     LOAD_FUNCPTR(gnutls_certificate_allocate_credentials)
1375     LOAD_FUNCPTR(gnutls_certificate_free_credentials)
1376     LOAD_FUNCPTR(gnutls_certificate_get_peers)
1377     LOAD_FUNCPTR(gnutls_cipher_get)
1378     LOAD_FUNCPTR(gnutls_cipher_get_key_size)
1379     LOAD_FUNCPTR(gnutls_credentials_set)
1380     LOAD_FUNCPTR(gnutls_deinit)
1381     LOAD_FUNCPTR(gnutls_global_deinit)
1382     LOAD_FUNCPTR(gnutls_global_init)
1383     LOAD_FUNCPTR(gnutls_global_set_log_function)
1384     LOAD_FUNCPTR(gnutls_global_set_log_level)
1385     LOAD_FUNCPTR(gnutls_handshake)
1386     LOAD_FUNCPTR(gnutls_init)
1387     LOAD_FUNCPTR(gnutls_kx_get)
1388     LOAD_FUNCPTR(gnutls_mac_get)
1389     LOAD_FUNCPTR(gnutls_mac_get_key_size)
1390     LOAD_FUNCPTR(gnutls_perror)
1391     LOAD_FUNCPTR(gnutls_protocol_get_version)
1392     LOAD_FUNCPTR(gnutls_set_default_priority)
1393     LOAD_FUNCPTR(gnutls_record_recv);
1394     LOAD_FUNCPTR(gnutls_record_send);
1395     LOAD_FUNCPTR(gnutls_transport_set_errno)
1396     LOAD_FUNCPTR(gnutls_transport_set_ptr)
1397     LOAD_FUNCPTR(gnutls_transport_set_pull_function)
1398     LOAD_FUNCPTR(gnutls_transport_set_push_function)
1399 #undef LOAD_FUNCPTR
1400
1401     ret = pgnutls_global_init();
1402     if (ret != GNUTLS_E_SUCCESS)
1403     {
1404         pgnutls_perror(ret);
1405         goto fail;
1406     }
1407
1408     if (TRACE_ON(secur32))
1409     {
1410         pgnutls_global_set_log_level(4);
1411         pgnutls_global_set_log_function(schan_gnutls_log);
1412     }
1413
1414     schan_handle_table = HeapAlloc(GetProcessHeap(), 0, 64 * sizeof(*schan_handle_table));
1415     if (!schan_handle_table)
1416     {
1417         ERR("Failed to allocate schannel handle table.\n");
1418         goto fail;
1419     }
1420     schan_handle_table_size = 64;
1421
1422     provider = SECUR32_addProvider(&schanTableA, &schanTableW, schannelDllName);
1423     if (!provider)
1424     {
1425         ERR("Failed to add schannel provider.\n");
1426         goto fail;
1427     }
1428
1429     SECUR32_addPackages(provider, sizeof(info) / sizeof(info[0]), NULL, info);
1430
1431     return;
1432
1433 fail:
1434     HeapFree(GetProcessHeap(), 0, schan_handle_table);
1435     schan_handle_table = NULL;
1436     wine_dlclose(libgnutls_handle, NULL, 0);
1437     libgnutls_handle = NULL;
1438     return;
1439 }
1440
1441 void SECUR32_deinitSchannelSP(void)
1442 {
1443     SIZE_T i = schan_handle_count;
1444
1445     if (!libgnutls_handle) return;
1446
1447     /* deinitialized sessions first because a pointer to the credentials
1448      * are stored for the session by calling gnutls_credentials_set. */
1449     while (i--)
1450     {
1451         if (schan_handle_table[i].type == SCHAN_HANDLE_CTX)
1452         {
1453             struct schan_context *ctx = schan_free_handle(i, SCHAN_HANDLE_CTX);
1454             pgnutls_deinit(ctx->session);
1455             HeapFree(GetProcessHeap(), 0, ctx);
1456         }
1457     }
1458     i = schan_handle_count;
1459     while (i--)
1460     {
1461         if (schan_handle_table[i].type != SCHAN_HANDLE_FREE)
1462         {
1463             struct schan_credentials *cred;
1464             cred = schan_free_handle(i, SCHAN_HANDLE_CRED);
1465             pgnutls_certificate_free_credentials(cred->credentials);
1466             HeapFree(GetProcessHeap(), 0, cred);
1467         }
1468     }
1469     HeapFree(GetProcessHeap(), 0, schan_handle_table);
1470     pgnutls_global_deinit();
1471     wine_dlclose(libgnutls_handle, NULL, 0);
1472 }
1473
1474 #else /* SONAME_LIBGNUTLS */
1475
1476 void SECUR32_initSchannelSP(void)
1477 {
1478     ERR("libgnutls not found, SSL connections will fail\n");
1479 }
1480
1481 void SECUR32_deinitSchannelSP(void) {}
1482
1483 #endif /* SONAME_LIBGNUTLS */