contrib/wpa_supplicant-0.5.8/tls_schannel.c

   1 /*
   2  * WPA Supplicant / SSL/TLS interface functions for Microsoft Schannel
   3  * Copyright (c) 2005, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 /*
  16  * FIX: Go through all SSPI functions and verify what needs to be freed
  17  * FIX: session resumption
  18  * TODO: add support for server cert chain validation
  19  * TODO: add support for CA cert validation
  20  * TODO: add support for EAP-TLS (client cert/key conf)
  21  */
  22
  23 #include "includes.h"
  24 #include <windows.h>
  25 #include <wincrypt.h>
  26 #include <schannel.h>
  27 #define SECURITY_WIN32
  28 #include <security.h>
  29 #include <sspi.h>
  30
  31 #include "common.h"
  32 #include "tls.h"
  33
  34
  35 struct tls_global {
  36         HMODULE hsecurity;
  37         PSecurityFunctionTable sspi;
  38         HCERTSTORE my_cert_store;
  39 };
  40
  41 struct tls_connection {
  42         int established, start;
  43         int failed, read_alerts, write_alerts;
  44
  45         SCHANNEL_CRED schannel_cred;
  46         CredHandle creds;
  47         CtxtHandle context;
  48
  49         u8 eap_tls_prf[128];
  50         int eap_tls_prf_set;
  51 };
  52
  53
  54 static int schannel_load_lib(struct tls_global *global)
  55 {
  56         INIT_SECURITY_INTERFACE pInitSecurityInterface;
  57
  58         global->hsecurity = LoadLibrary(TEXT("Secur32.dll"));
  59         if (global->hsecurity == NULL) {
  60                 wpa_printf(MSG_ERROR, "%s: Could not load Secur32.dll - 0x%x",
  61                            __func__, (unsigned int) GetLastError());
  62                 return -1;
  63         }
  64
  65         pInitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(
  66                 global->hsecurity, "InitSecurityInterfaceA");
  67         if (pInitSecurityInterface == NULL) {
  68                 wpa_printf(MSG_ERROR, "%s: Could not find "
  69                            "InitSecurityInterfaceA from Secur32.dll",
  70                            __func__);
  71                 FreeLibrary(global->hsecurity);
  72                 global->hsecurity = NULL;
  73                 return -1;
  74         }
  75
  76         global->sspi = pInitSecurityInterface();
  77         if (global->sspi == NULL) {
  78                 wpa_printf(MSG_ERROR, "%s: Could not read security "
  79                            "interface - 0x%x",
  80                            __func__, (unsigned int) GetLastError());
  81                 FreeLibrary(global->hsecurity);
  82                 global->hsecurity = NULL;
  83                 return -1;
  84         }
  85
  86         return 0;
  87 }
  88
  89
  90 void * tls_init(const struct tls_config *conf)
  91 {
  92         struct tls_global *global;
  93
  94         global = os_zalloc(sizeof(*global));
  95         if (global == NULL)
  96                 return NULL;
  97         if (schannel_load_lib(global)) {
  98                 os_free(global);
  99                 return NULL;
 100         }
 101         return global;
 102 }
 103
 104
 105 void tls_deinit(void *ssl_ctx)
 106 {
 107         struct tls_global *global = ssl_ctx;
 108
 109         if (global->my_cert_store)
 110                 CertCloseStore(global->my_cert_store, 0);
 111         FreeLibrary(global->hsecurity);
 112         os_free(global);
 113 }
 114
 115
 116 int tls_get_errors(void *ssl_ctx)
 117 {
 118         return 0;
 119 }
 120
 121
 122 struct tls_connection * tls_connection_init(void *ssl_ctx)
 123 {
 124         struct tls_connection *conn;
 125
 126         conn = os_zalloc(sizeof(*conn));
 127         if (conn == NULL)
 128                 return NULL;
 129         conn->start = 1;
 130
 131         return conn;
 132 }
 133
 134
 135 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
 136 {
 137         if (conn == NULL)
 138                 return;
 139
 140         os_free(conn);
 141 }
 142
 143
 144 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
 145 {
 146         return conn ? conn->established : 0;
 147 }
 148
 149
 150 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
 151 {
 152         struct tls_global *global = ssl_ctx;
 153         if (conn == NULL)
 154                 return -1;
 155
 156         conn->eap_tls_prf_set = 0;
 157         conn->established = conn->failed = 0;
 158         conn->read_alerts = conn->write_alerts = 0;
 159         global->sspi->DeleteSecurityContext(&conn->context);
 160         /* FIX: what else needs to be reseted? */
 161
 162         return 0;
 163 }
 164
 165
 166 int tls_global_set_params(void *tls_ctx,
 167                           const struct tls_connection_params *params)
 168 {
 169         return -1;
 170 }
 171
 172
 173 int tls_global_set_verify(void *ssl_ctx, int check_crl)
 174 {
 175         return -1;
 176 }
 177
 178
 179 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
 180                               int verify_peer)
 181 {
 182         return -1;
 183 }
 184
 185
 186 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
 187                             struct tls_keys *keys)
 188 {
 189         /* Schannel does not export master secret or client/server random. */
 190         return -1;
 191 }
 192
 193
 194 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
 195                        const char *label, int server_random_first,
 196                        u8 *out, size_t out_len)
 197 {
 198         /*
 199          * Cannot get master_key from Schannel, but EapKeyBlock can be used to
 200          * generate session keys for EAP-TLS and EAP-PEAPv0. EAP-PEAPv2 and
 201          * EAP-TTLS cannot use this, though, since they are using different
 202          * labels. The only option could be to implement TLSv1 completely here
 203          * and just use Schannel or CryptoAPI for low-level crypto
 204          * functionality..
 205          */
 206
 207         if (conn == NULL || !conn->eap_tls_prf_set || server_random_first ||
 208             os_strcmp(label, "client EAP encryption") != 0 ||
 209             out_len > sizeof(conn->eap_tls_prf))
 210                 return -1;
 211
 212         os_memcpy(out, conn->eap_tls_prf, out_len);
 213
 214         return 0;
 215 }
 216
 217
 218 static u8 * tls_conn_hs_clienthello(struct tls_global *global,
 219                                     struct tls_connection *conn,
 220                                     size_t *out_len)
 221 {
 222         DWORD sspi_flags, sspi_flags_out;
 223         SecBufferDesc outbuf;
 224         SecBuffer outbufs[1];
 225         SECURITY_STATUS status;
 226         TimeStamp ts_expiry;
 227
 228         sspi_flags = ISC_REQ_REPLAY_DETECT |
 229                 ISC_REQ_CONFIDENTIALITY |
 230                 ISC_RET_EXTENDED_ERROR |
 231                 ISC_REQ_ALLOCATE_MEMORY |
 232                 ISC_REQ_MANUAL_CRED_VALIDATION;
 233
 234         wpa_printf(MSG_DEBUG, "%s: Generating ClientHello", __func__);
 235
 236         outbufs[0].pvBuffer = NULL;
 237         outbufs[0].BufferType = SECBUFFER_TOKEN;
 238         outbufs[0].cbBuffer = 0;
 239
 240         outbuf.cBuffers = 1;
 241         outbuf.pBuffers = outbufs;
 242         outbuf.ulVersion = SECBUFFER_VERSION;
 243
 244 #ifdef UNICODE
 245         status = global->sspi->InitializeSecurityContextW(
 246                 &conn->creds, NULL, NULL /* server name */, sspi_flags, 0,
 247                 SECURITY_NATIVE_DREP, NULL, 0, &conn->context,
 248                 &outbuf, &sspi_flags_out, &ts_expiry);
 249 #else /* UNICODE */
 250         status = global->sspi->InitializeSecurityContextA(
 251                 &conn->creds, NULL, NULL /* server name */, sspi_flags, 0,
 252                 SECURITY_NATIVE_DREP, NULL, 0, &conn->context,
 253                 &outbuf, &sspi_flags_out, &ts_expiry);
 254 #endif /* UNICODE */
 255         if (status != SEC_I_CONTINUE_NEEDED) {
 256                 wpa_printf(MSG_ERROR, "%s: InitializeSecurityContextA "
 257                            "failed - 0x%x",
 258                            __func__, (unsigned int) status);
 259                 return NULL;
 260         }
 261
 262         if (outbufs[0].cbBuffer != 0 && outbufs[0].pvBuffer) {
 263                 u8 *buf;
 264                 wpa_hexdump(MSG_MSGDUMP, "SChannel - ClientHello",
 265                             outbufs[0].pvBuffer, outbufs[0].cbBuffer);
 266                 conn->start = 0;
 267                 *out_len = outbufs[0].cbBuffer;
 268                 buf = os_malloc(*out_len);
 269                 if (buf == NULL)
 270                         return NULL;
 271                 os_memcpy(buf, outbufs[0].pvBuffer, *out_len);
 272                 global->sspi->FreeContextBuffer(outbufs[0].pvBuffer);
 273                 return buf;
 274         }
 275
 276         wpa_printf(MSG_ERROR, "SChannel: Failed to generate ClientHello");
 277
 278         return NULL;
 279 }
 280
 281
 282 #ifndef SECPKG_ATTR_EAP_KEY_BLOCK
 283 #define SECPKG_ATTR_EAP_KEY_BLOCK 0x5b
 284
 285 typedef struct _SecPkgContext_EapKeyBlock {
 286         BYTE rgbKeys[128];
 287         BYTE rgbIVs[64];
 288 } SecPkgContext_EapKeyBlock, *PSecPkgContext_EapKeyBlock;
 289 #endif /* !SECPKG_ATTR_EAP_KEY_BLOCK */
 290
 291 static int tls_get_eap(struct tls_global *global, struct tls_connection *conn)
 292 {
 293         SECURITY_STATUS status;
 294         SecPkgContext_EapKeyBlock kb;
 295
 296         /* Note: Windows NT and Windows Me/98/95 do not support getting
 297          * EapKeyBlock */
 298
 299         status = global->sspi->QueryContextAttributes(
 300                 &conn->context, SECPKG_ATTR_EAP_KEY_BLOCK, &kb);
 301         if (status != SEC_E_OK) {
 302                 wpa_printf(MSG_DEBUG, "%s: QueryContextAttributes("
 303                            "SECPKG_ATTR_EAP_KEY_BLOCK) failed (%d)",
 304                            __func__, (int) status);
 305                 return -1;
 306         }
 307
 308         wpa_hexdump_key(MSG_MSGDUMP, "Schannel - EapKeyBlock - rgbKeys",
 309                         kb.rgbKeys, sizeof(kb.rgbKeys));
 310         wpa_hexdump_key(MSG_MSGDUMP, "Schannel - EapKeyBlock - rgbIVs",
 311                         kb.rgbIVs, sizeof(kb.rgbIVs));
 312
 313         os_memcpy(conn->eap_tls_prf, kb.rgbKeys, sizeof(kb.rgbKeys));
 314         conn->eap_tls_prf_set = 1;
 315         return 0;
 316 }
 317
 318
 319 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
 320                               const u8 *in_data, size_t in_len,
 321                               size_t *out_len, u8 **appl_data,
 322                               size_t *appl_data_len)
 323 {
 324         struct tls_global *global = ssl_ctx;
 325         DWORD sspi_flags, sspi_flags_out;
 326         SecBufferDesc inbuf, outbuf;
 327         SecBuffer inbufs[2], outbufs[1];
 328         SECURITY_STATUS status;
 329         TimeStamp ts_expiry;
 330         u8 *out_buf = NULL;
 331
 332         if (appl_data)
 333                 *appl_data = NULL;
 334
 335         if (conn->start) {
 336                 return tls_conn_hs_clienthello(global, conn, out_len);
 337         }
 338
 339         wpa_printf(MSG_DEBUG, "SChannel: %d bytes handshake data to process",
 340                    in_len);
 341
 342         sspi_flags = ISC_REQ_REPLAY_DETECT |
 343                 ISC_REQ_CONFIDENTIALITY |
 344                 ISC_RET_EXTENDED_ERROR |
 345                 ISC_REQ_ALLOCATE_MEMORY |
 346                 ISC_REQ_MANUAL_CRED_VALIDATION;
 347
 348         /* Input buffer for Schannel */
 349         inbufs[0].pvBuffer = (u8 *) in_data;
 350         inbufs[0].cbBuffer = in_len;
 351         inbufs[0].BufferType = SECBUFFER_TOKEN;
 352
 353         /* Place for leftover data from Schannel */
 354         inbufs[1].pvBuffer = NULL;
 355         inbufs[1].cbBuffer = 0;
 356         inbufs[1].BufferType = SECBUFFER_EMPTY;
 357
 358         inbuf.cBuffers = 2;
 359         inbuf.pBuffers = inbufs;
 360         inbuf.ulVersion = SECBUFFER_VERSION;
 361
 362         /* Output buffer for Schannel */
 363         outbufs[0].pvBuffer = NULL;
 364         outbufs[0].cbBuffer = 0;
 365         outbufs[0].BufferType = SECBUFFER_TOKEN;
 366
 367         outbuf.cBuffers = 1;
 368         outbuf.pBuffers = outbufs;
 369         outbuf.ulVersion = SECBUFFER_VERSION;
 370
 371 #ifdef UNICODE
 372         status = global->sspi->InitializeSecurityContextW(
 373                 &conn->creds, &conn->context, NULL, sspi_flags, 0,
 374                 SECURITY_NATIVE_DREP, &inbuf, 0, NULL,
 375                 &outbuf, &sspi_flags_out, &ts_expiry);
 376 #else /* UNICODE */
 377         status = global->sspi->InitializeSecurityContextA(
 378                 &conn->creds, &conn->context, NULL, sspi_flags, 0,
 379                 SECURITY_NATIVE_DREP, &inbuf, 0, NULL,
 380                 &outbuf, &sspi_flags_out, &ts_expiry);
 381 #endif /* UNICODE */
 382
 383         wpa_printf(MSG_MSGDUMP, "Schannel: InitializeSecurityContext -> "
 384                    "status=%d inlen[0]=%d intype[0]=%d inlen[1]=%d "
 385                    "intype[1]=%d outlen[0]=%d",
 386                    (int) status, (int) inbufs[0].cbBuffer,
 387                    (int) inbufs[0].BufferType, (int) inbufs[1].cbBuffer,
 388                    (int) inbufs[1].BufferType,
 389                    (int) outbufs[0].cbBuffer);
 390         if (status == SEC_E_OK || status == SEC_I_CONTINUE_NEEDED ||
 391             (FAILED(status) && (sspi_flags_out & ISC_RET_EXTENDED_ERROR))) {
 392                 if (outbufs[0].cbBuffer != 0 && outbufs[0].pvBuffer) {
 393                         wpa_hexdump(MSG_MSGDUMP, "SChannel - output",
 394                                     outbufs[0].pvBuffer, outbufs[0].cbBuffer);
 395                         *out_len = outbufs[0].cbBuffer;
 396                         out_buf = os_malloc(*out_len);
 397                         if (out_buf)
 398                                 os_memcpy(out_buf, outbufs[0].pvBuffer,
 399                                           *out_len);
 400                         global->sspi->FreeContextBuffer(outbufs[0].pvBuffer);
 401                         outbufs[0].pvBuffer = NULL;
 402                         if (out_buf == NULL)
 403                                 return NULL;
 404                 }
 405         }
 406
 407         switch (status) {
 408         case SEC_E_INCOMPLETE_MESSAGE:
 409                 wpa_printf(MSG_DEBUG, "Schannel: SEC_E_INCOMPLETE_MESSAGE");
 410                 break;
 411         case SEC_I_CONTINUE_NEEDED:
 412                 wpa_printf(MSG_DEBUG, "Schannel: SEC_I_CONTINUE_NEEDED");
 413                 break;
 414         case SEC_E_OK:
 415                 /* TODO: verify server certificate chain */
 416                 wpa_printf(MSG_DEBUG, "Schannel: SEC_E_OK - Handshake "
 417                            "completed successfully");
 418                 conn->established = 1;
 419                 tls_get_eap(global, conn);
 420
 421                 /* Need to return something to get final TLS ACK. */
 422                 if (out_buf == NULL)
 423                         out_buf = os_malloc(1);
 424
 425                 if (inbufs[1].BufferType == SECBUFFER_EXTRA) {
 426                         wpa_hexdump(MSG_MSGDUMP, "SChannel - Encrypted "
 427                                     "application data",
 428                                     inbufs[1].pvBuffer, inbufs[1].cbBuffer);
 429                         if (appl_data) {
 430                                 *appl_data_len = outbufs[1].cbBuffer;
 431                                 appl_data = os_malloc(*appl_data_len);
 432                                 if (appl_data)
 433                                         os_memcpy(appl_data,
 434                                                   outbufs[1].pvBuffer,
 435                                                   *appl_data_len);
 436                         }
 437                         global->sspi->FreeContextBuffer(inbufs[1].pvBuffer);
 438                         inbufs[1].pvBuffer = NULL;
 439                 }
 440                 break;
 441         case SEC_I_INCOMPLETE_CREDENTIALS:
 442                 wpa_printf(MSG_DEBUG,
 443                            "Schannel: SEC_I_INCOMPLETE_CREDENTIALS");
 444                 break;
 445         case SEC_E_WRONG_PRINCIPAL:
 446                 wpa_printf(MSG_DEBUG, "Schannel: SEC_E_WRONG_PRINCIPAL");
 447                 break;
 448         case SEC_E_INTERNAL_ERROR:
 449                 wpa_printf(MSG_DEBUG, "Schannel: SEC_E_INTERNAL_ERROR");
 450                 break;
 451         }
 452
 453         if (FAILED(status)) {
 454                 wpa_printf(MSG_DEBUG, "Schannel: Handshake failed "
 455                            "(out_buf=%p)", out_buf);
 456                 conn->failed++;
 457                 global->sspi->DeleteSecurityContext(&conn->context);
 458                 return out_buf;
 459         }
 460
 461         if (inbufs[1].BufferType == SECBUFFER_EXTRA) {
 462                 /* TODO: Can this happen? What to do with this data? */
 463                 wpa_hexdump(MSG_MSGDUMP, "SChannel - Leftover data",
 464                             inbufs[1].pvBuffer, inbufs[1].cbBuffer);
 465                 global->sspi->FreeContextBuffer(inbufs[1].pvBuffer);
 466                 inbufs[1].pvBuffer = NULL;
 467         }
 468
 469         return out_buf;
 470 }
 471
 472
 473 u8 * tls_connection_server_handshake(void *ssl_ctx,
 474                                      struct tls_connection *conn,
 475                                      const u8 *in_data, size_t in_len,
 476                                      size_t *out_len)
 477 {
 478         return NULL;
 479 }
 480
 481
 482 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
 483                            const u8 *in_data, size_t in_len,
 484                            u8 *out_data, size_t out_len)
 485 {
 486         struct tls_global *global = ssl_ctx;
 487         SECURITY_STATUS status;
 488         SecBufferDesc buf;
 489         SecBuffer bufs[4];
 490         SecPkgContext_StreamSizes sizes;
 491         int i;
 492         size_t total_len;
 493
 494         status = global->sspi->QueryContextAttributes(&conn->context,
 495                                                       SECPKG_ATTR_STREAM_SIZES,
 496                                                       &sizes);
 497         if (status != SEC_E_OK) {
 498                 wpa_printf(MSG_DEBUG, "%s: QueryContextAttributes failed",
 499                            __func__);
 500                 return -1;
 501         }
 502         wpa_printf(MSG_DEBUG, "%s: Stream sizes: header=%u trailer=%u",
 503                    __func__,
 504                    (unsigned int) sizes.cbHeader,
 505                    (unsigned int) sizes.cbTrailer);
 506
 507         total_len = sizes.cbHeader + in_len + sizes.cbTrailer;
 508
 509         if (out_len < total_len) {
 510                 wpa_printf(MSG_DEBUG, "%s: too short out_data (out_len=%lu "
 511                            "in_len=%lu total_len=%lu)", __func__,
 512                            (unsigned long) out_len, (unsigned long) in_len,
 513                            (unsigned long) total_len);
 514                 return -1;
 515         }
 516
 517         os_memset(&bufs, 0, sizeof(bufs));
 518         bufs[0].pvBuffer = out_data;
 519         bufs[0].cbBuffer = sizes.cbHeader;
 520         bufs[0].BufferType = SECBUFFER_STREAM_HEADER;
 521
 522         os_memcpy(out_data + sizes.cbHeader, in_data, in_len);
 523         bufs[1].pvBuffer = out_data + sizes.cbHeader;
 524         bufs[1].cbBuffer = in_len;
 525         bufs[1].BufferType = SECBUFFER_DATA;
 526
 527         bufs[2].pvBuffer = out_data + sizes.cbHeader + in_len;
 528         bufs[2].cbBuffer = sizes.cbTrailer;
 529         bufs[2].BufferType = SECBUFFER_STREAM_TRAILER;
 530
 531         buf.ulVersion = SECBUFFER_VERSION;
 532         buf.cBuffers = 3;
 533         buf.pBuffers = bufs;
 534
 535         status = global->sspi->EncryptMessage(&conn->context, 0, &buf, 0);
 536
 537         wpa_printf(MSG_MSGDUMP, "Schannel: EncryptMessage -> "
 538                    "status=%d len[0]=%d type[0]=%d len[1]=%d type[1]=%d "
 539                    "len[2]=%d type[2]=%d",
 540                    (int) status,
 541                    (int) bufs[0].cbBuffer, (int) bufs[0].BufferType,
 542                    (int) bufs[1].cbBuffer, (int) bufs[1].BufferType,
 543                    (int) bufs[2].cbBuffer, (int) bufs[2].BufferType);
 544         wpa_printf(MSG_MSGDUMP, "Schannel: EncryptMessage pointers: "
 545                    "out_data=%p bufs %p %p %p",
 546                    out_data, bufs[0].pvBuffer, bufs[1].pvBuffer,
 547                    bufs[2].pvBuffer);
 548
 549         for (i = 0; i < 3; i++) {
 550                 if (bufs[i].pvBuffer && bufs[i].BufferType != SECBUFFER_EMPTY)
 551                 {
 552                         wpa_hexdump(MSG_MSGDUMP, "SChannel: bufs",
 553                                     bufs[i].pvBuffer, bufs[i].cbBuffer);
 554                 }
 555         }
 556
 557         if (status == SEC_E_OK) {
 558                 wpa_printf(MSG_DEBUG, "%s: SEC_E_OK", __func__);
 559                 wpa_hexdump_key(MSG_MSGDUMP, "Schannel: Encrypted data from "
 560                                 "EncryptMessage", out_data, total_len);
 561                 return total_len;
 562         }
 563
 564         wpa_printf(MSG_DEBUG, "%s: Failed - status=%d",
 565                    __func__, (int) status);
 566         return -1;
 567 }
 568
 569
 570 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
 571                            const u8 *in_data, size_t in_len,
 572                            u8 *out_data, size_t out_len)
 573 {
 574         struct tls_global *global = ssl_ctx;
 575         SECURITY_STATUS status;
 576         SecBufferDesc buf;
 577         SecBuffer bufs[4];
 578         int i;
 579
 580         if (out_len < in_len) {
 581                 wpa_printf(MSG_DEBUG, "%s: out_len=%lu < in_len=%lu", __func__,
 582                            (unsigned long) out_len, (unsigned long) in_len);
 583                 return -1;
 584         }
 585
 586         wpa_hexdump(MSG_MSGDUMP, "Schannel: Encrypted data to DecryptMessage",
 587                     in_data, in_len);
 588         os_memset(&bufs, 0, sizeof(bufs));
 589         os_memcpy(out_data, in_data, in_len);
 590         bufs[0].pvBuffer = out_data;
 591         bufs[0].cbBuffer = in_len;
 592         bufs[0].BufferType = SECBUFFER_DATA;
 593
 594         bufs[1].BufferType = SECBUFFER_EMPTY;
 595         bufs[2].BufferType = SECBUFFER_EMPTY;
 596         bufs[3].BufferType = SECBUFFER_EMPTY;
 597
 598         buf.ulVersion = SECBUFFER_VERSION;
 599         buf.cBuffers = 4;
 600         buf.pBuffers = bufs;
 601
 602         status = global->sspi->DecryptMessage(&conn->context, &buf, 0,
 603                                                     NULL);
 604         wpa_printf(MSG_MSGDUMP, "Schannel: DecryptMessage -> "
 605                    "status=%d len[0]=%d type[0]=%d len[1]=%d type[1]=%d "
 606                    "len[2]=%d type[2]=%d len[3]=%d type[3]=%d",
 607                    (int) status,
 608                    (int) bufs[0].cbBuffer, (int) bufs[0].BufferType,
 609                    (int) bufs[1].cbBuffer, (int) bufs[1].BufferType,
 610                    (int) bufs[2].cbBuffer, (int) bufs[2].BufferType,
 611                    (int) bufs[3].cbBuffer, (int) bufs[3].BufferType);
 612         wpa_printf(MSG_MSGDUMP, "Schannel: DecryptMessage pointers: "
 613                    "out_data=%p bufs %p %p %p %p",
 614                    out_data, bufs[0].pvBuffer, bufs[1].pvBuffer,
 615                    bufs[2].pvBuffer, bufs[3].pvBuffer);
 616
 617         switch (status) {
 618         case SEC_E_INCOMPLETE_MESSAGE:
 619                 wpa_printf(MSG_DEBUG, "%s: SEC_E_INCOMPLETE_MESSAGE",
 620                            __func__);
 621                 break;
 622         case SEC_E_OK:
 623                 wpa_printf(MSG_DEBUG, "%s: SEC_E_OK", __func__);
 624                 for (i = 0; i < 4; i++) {
 625                         if (bufs[i].BufferType == SECBUFFER_DATA)
 626                                 break;
 627                 }
 628                 if (i == 4) {
 629                         wpa_printf(MSG_DEBUG, "%s: No output data from "
 630                                    "DecryptMessage", __func__);
 631                         return -1;
 632                 }
 633                 wpa_hexdump_key(MSG_MSGDUMP, "Schannel: Decrypted data from "
 634                                 "DecryptMessage",
 635                                 bufs[i].pvBuffer, bufs[i].cbBuffer);
 636                 if (bufs[i].cbBuffer > out_len) {
 637                         wpa_printf(MSG_DEBUG, "%s: Too long output data",
 638                                    __func__);
 639                         return -1;
 640                 }
 641                 os_memmove(out_data, bufs[i].pvBuffer, bufs[i].cbBuffer);
 642                 return bufs[i].cbBuffer;
 643         }
 644
 645         wpa_printf(MSG_DEBUG, "%s: Failed - status=%d",
 646                    __func__, (int) status);
 647         return -1;
 648 }
 649
 650
 651 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
 652 {
 653         return 0;
 654 }
 655
 656
 657 int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
 658                                   const u8 *key, size_t key_len)
 659 {
 660         return -1;
 661 }
 662
 663
 664 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
 665                                    u8 *ciphers)
 666 {
 667         return -1;
 668 }
 669
 670
 671 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
 672                    char *buf, size_t buflen)
 673 {
 674         return -1;
 675 }
 676
 677
 678 int tls_connection_enable_workaround(void *ssl_ctx,
 679                                      struct tls_connection *conn)
 680 {
 681         return 0;
 682 }
 683
 684
 685 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
 686                                     int ext_type, const u8 *data,
 687                                     size_t data_len)
 688 {
 689         return -1;
 690 }
 691
 692
 693 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
 694 {
 695         if (conn == NULL)
 696                 return -1;
 697         return conn->failed;
 698 }
 699
 700
 701 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
 702 {
 703         if (conn == NULL)
 704                 return -1;
 705         return conn->read_alerts;
 706 }
 707
 708
 709 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
 710 {
 711         if (conn == NULL)
 712                 return -1;
 713         return conn->write_alerts;
 714 }
 715
 716
 717 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
 718                               const struct tls_connection_params *params)
 719 {
 720         struct tls_global *global = tls_ctx;
 721         ALG_ID algs[1];
 722         SECURITY_STATUS status;
 723         TimeStamp ts_expiry;
 724
 725         if (conn == NULL)
 726                 return -1;
 727
 728         if (global->my_cert_store == NULL &&
 729             (global->my_cert_store = CertOpenSystemStore(0, TEXT("MY"))) ==
 730             NULL) {
 731                 wpa_printf(MSG_ERROR, "%s: CertOpenSystemStore failed - 0x%x",
 732                            __func__, (unsigned int) GetLastError());
 733                 return -1;
 734         }
 735
 736         os_memset(&conn->schannel_cred, 0, sizeof(conn->schannel_cred));
 737         conn->schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
 738         conn->schannel_cred.grbitEnabledProtocols = SP_PROT_TLS1;
 739         algs[0] = CALG_RSA_KEYX;
 740         conn->schannel_cred.cSupportedAlgs = 1;
 741         conn->schannel_cred.palgSupportedAlgs = algs;
 742         conn->schannel_cred.dwFlags |= SCH_CRED_NO_DEFAULT_CREDS;
 743 #ifdef UNICODE
 744         status = global->sspi->AcquireCredentialsHandleW(
 745                 NULL, UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL,
 746                 &conn->schannel_cred, NULL, NULL, &conn->creds, &ts_expiry);
 747 #else /* UNICODE */
 748         status = global->sspi->AcquireCredentialsHandleA(
 749                 NULL, UNISP_NAME_A, SECPKG_CRED_OUTBOUND, NULL,
 750                 &conn->schannel_cred, NULL, NULL, &conn->creds, &ts_expiry);
 751 #endif /* UNICODE */
 752         if (status != SEC_E_OK) {
 753                 wpa_printf(MSG_DEBUG, "%s: AcquireCredentialsHandleA failed - "
 754                            "0x%x", __func__, (unsigned int) status);
 755                 return -1;
 756         }
 757
 758         return 0;
 759 }
 760
 761
 762 unsigned int tls_capabilities(void *tls_ctx)
 763 {
 764         return 0;
 765 }
 766
 767
 768 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
 769                           int tls_ia)
 770 {
 771         return -1;
 772 }
 773
 774
 775 int tls_connection_ia_send_phase_finished(void *tls_ctx,
 776                                           struct tls_connection *conn,
 777                                           int final,
 778                                           u8 *out_data, size_t out_len)
 779 {
 780         return -1;
 781 }
 782
 783
 784 int tls_connection_ia_final_phase_finished(void *tls_ctx,
 785                                            struct tls_connection *conn)
 786 {
 787         return -1;
 788 }
 789
 790
 791 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
 792                                            struct tls_connection *conn,
 793                                            const u8 *key, size_t key_len)
 794 {
 795         return -1;
 796 }