engines/e_capi.c

   1 /* engines/e_capi.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54
  55 #include <stdio.h>
  56 #include <string.h>
  57 #include <openssl/crypto.h>
  58 #include <openssl/buffer.h>
  59 #include <openssl/bn.h>
  60
  61 #ifdef OPENSSL_SYS_WIN32
  62 #ifndef OPENSSL_NO_CAPIENG
  63
  64 #include <openssl/rsa.h>
  65
  66 #include <windows.h>
  67
  68 #ifndef _WIN32_WINNT
  69 #define _WIN32_WINNT 0x0400
  70 #endif
  71
  72 #include <wincrypt.h>
  73
  74 /*
  75  * This module uses several "new" interfaces, among which is
  76  * CertGetCertificateContextProperty. CERT_KEY_PROV_INFO_PROP_ID is
  77  * one of possible values you can pass to function in question. By
  78  * checking if it's defined we can see if wincrypt.h and accompanying
  79  * crypt32.lib are in shape. The native MingW32 headers up to and
  80  * including __W32API_VERSION 3.14 lack of struct DSSPUBKEY and the
  81  * defines CERT_STORE_PROV_SYSTEM_A and CERT_STORE_READONLY_FLAG,
  82  * so we check for these too and avoid compiling.
  83  * Yes, it's rather "weak" test and if compilation fails,
  84  * then re-configure with -DOPENSSL_NO_CAPIENG.
  85  */
  86 #if defined(CERT_KEY_PROV_INFO_PROP_ID) && \
  87     defined(CERT_STORE_PROV_SYSTEM_A) && \
  88     defined(CERT_STORE_READONLY_FLAG)
  89 # define __COMPILE_CAPIENG
  90 #endif /* CERT_KEY_PROV_INFO_PROP_ID */
  91 #endif /* OPENSSL_NO_CAPIENG */
  92 #endif /* OPENSSL_SYS_WIN32 */
  93
  94 #ifdef __COMPILE_CAPIENG
  95
  96 #undef X509_EXTENSIONS
  97 #undef X509_CERT_PAIR
  98
  99 /* Definitions which may be missing from earlier version of headers */
 100 #ifndef CERT_STORE_OPEN_EXISTING_FLAG
 101 #define CERT_STORE_OPEN_EXISTING_FLAG                   0x00004000
 102 #endif
 103
 104 #ifndef CERT_STORE_CREATE_NEW_FLAG
 105 #define CERT_STORE_CREATE_NEW_FLAG                      0x00002000
 106 #endif
 107
 108 #ifndef CERT_SYSTEM_STORE_CURRENT_USER
 109 #define CERT_SYSTEM_STORE_CURRENT_USER                  0x00010000
 110 #endif
 111
 112 #include <openssl/engine.h>
 113 #include <openssl/pem.h>
 114 #include <openssl/x509v3.h>
 115
 116 #include "e_capi_err.h"
 117 #include "e_capi_err.c"
 118
 119
 120 static const char *engine_capi_id = "capi";
 121 static const char *engine_capi_name = "CryptoAPI ENGINE";
 122
 123 typedef struct CAPI_CTX_st CAPI_CTX;
 124 typedef struct CAPI_KEY_st CAPI_KEY;
 125
 126 static void capi_addlasterror(void);
 127 static void capi_adderror(DWORD err);
 128
 129 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...);
 130
 131 static int capi_list_providers(CAPI_CTX *ctx, BIO *out);
 132 static int capi_list_containers(CAPI_CTX *ctx, BIO *out);
 133 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *storename);
 134 void capi_free_key(CAPI_KEY *key);
 135
 136 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore);
 137
 138 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id);
 139
 140 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 141         UI_METHOD *ui_method, void *callback_data);
 142 static int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 143              unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
 144 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
 145                 unsigned char *to, RSA *rsa, int padding);
 146 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
 147                 unsigned char *to, RSA *rsa, int padding);
 148 static int capi_rsa_free(RSA *rsa);
 149
 150 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 151                                                         DSA *dsa);
 152 static int capi_dsa_free(DSA *dsa);
 153
 154 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
 155         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
 156         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
 157
 158 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 159 #ifdef OPENSSL_CAPIENG_DIALOG
 160 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 161 #endif
 162
 163 typedef PCCERT_CONTEXT (WINAPI *CERTDLG)(HCERTSTORE, HWND, LPCWSTR,
 164                                                 LPCWSTR, DWORD, DWORD,
 165                                                 void *);
 166 typedef HWND (WINAPI *GETCONSWIN)(void);
 167
 168 /* This structure contains CAPI ENGINE specific data:
 169  * it contains various global options and affects how
 170  * other functions behave.
 171  */
 172
 173 #define CAPI_DBG_TRACE  2
 174 #define CAPI_DBG_ERROR  1
 175
 176 struct CAPI_CTX_st {
 177         int debug_level;
 178         char *debug_file;
 179         /* Parameters to use for container lookup */
 180         DWORD keytype;
 181         LPSTR cspname;
 182         DWORD csptype;
 183         /* Certificate store name to use */
 184         LPSTR storename;
 185         LPSTR ssl_client_store;
 186         /* System store flags */
 187         DWORD store_flags;
 188
 189 /* Lookup string meanings in load_private_key */
 190 /* Substring of subject: uses "storename" */
 191 #define CAPI_LU_SUBSTR          1
 192 /* Friendly name: uses storename */
 193 #define CAPI_LU_FNAME           2
 194 /* Container name: uses cspname, keytype */
 195 #define CAPI_LU_CONTNAME        3
 196         int lookup_method;
 197 /* Info to dump with dumpcerts option */
 198 /* Issuer and serial name strings */
 199 #define CAPI_DMP_SUMMARY        0x1
 200 /* Friendly name */
 201 #define CAPI_DMP_FNAME          0x2
 202 /* Full X509_print dump */
 203 #define CAPI_DMP_FULL           0x4
 204 /* Dump PEM format certificate */
 205 #define CAPI_DMP_PEM            0x8
 206 /* Dump pseudo key (if possible) */
 207 #define CAPI_DMP_PSKEY          0x10
 208 /* Dump key info (if possible) */
 209 #define CAPI_DMP_PKEYINFO       0x20
 210
 211         DWORD dump_flags;
 212         int (*client_cert_select)(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 213
 214         CERTDLG certselectdlg;
 215         GETCONSWIN getconswindow;
 216 };
 217
 218
 219 static CAPI_CTX *capi_ctx_new();
 220 static void capi_ctx_free(CAPI_CTX *ctx);
 221 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
 222 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
 223
 224 #define CAPI_CMD_LIST_CERTS             ENGINE_CMD_BASE
 225 #define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
 226 #define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
 227 #define CAPI_CMD_DEBUG_FILE             (ENGINE_CMD_BASE + 3)
 228 #define CAPI_CMD_KEYTYPE                (ENGINE_CMD_BASE + 4)
 229 #define CAPI_CMD_LIST_CSPS              (ENGINE_CMD_BASE + 5)
 230 #define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
 231 #define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
 232 #define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
 233 #define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
 234 #define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
 235 #define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
 236 #define CAPI_CMD_STORE_NAME             (ENGINE_CMD_BASE + 12)
 237 #define CAPI_CMD_STORE_FLAGS            (ENGINE_CMD_BASE + 13)
 238
 239 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
 240         {CAPI_CMD_LIST_CERTS,
 241                 "list_certs",
 242                 "List all certificates in store",
 243                 ENGINE_CMD_FLAG_NO_INPUT},
 244         {CAPI_CMD_LOOKUP_CERT,
 245                 "lookup_cert",
 246                 "Lookup and output certificates",
 247                 ENGINE_CMD_FLAG_STRING},
 248         {CAPI_CMD_DEBUG_LEVEL,
 249                 "debug_level",
 250                 "debug level (1=errors, 2=trace)",
 251                 ENGINE_CMD_FLAG_NUMERIC},
 252         {CAPI_CMD_DEBUG_FILE,
 253                 "debug_file",
 254                 "debugging filename)",
 255                 ENGINE_CMD_FLAG_STRING},
 256         {CAPI_CMD_KEYTYPE,
 257                 "key_type",
 258                 "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
 259                 ENGINE_CMD_FLAG_NUMERIC},
 260         {CAPI_CMD_LIST_CSPS,
 261                 "list_csps",
 262                 "List all CSPs",
 263                 ENGINE_CMD_FLAG_NO_INPUT},
 264         {CAPI_CMD_SET_CSP_IDX,
 265                 "csp_idx",
 266                 "Set CSP by index",
 267                 ENGINE_CMD_FLAG_NUMERIC},
 268         {CAPI_CMD_SET_CSP_NAME,
 269                 "csp_name",
 270                 "Set CSP name, (default CSP used if not specified)",
 271                 ENGINE_CMD_FLAG_STRING},
 272         {CAPI_CMD_SET_CSP_TYPE,
 273                 "csp_type",
 274                 "Set CSP type, (default RSA_PROV_FULL)",
 275                 ENGINE_CMD_FLAG_NUMERIC},
 276         {CAPI_CMD_LIST_CONTAINERS,
 277                 "list_containers",
 278                 "list container names",
 279                 ENGINE_CMD_FLAG_NO_INPUT},
 280         {CAPI_CMD_LIST_OPTIONS,
 281                 "list_options",
 282                 "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
 283                 "32=private key info)",
 284                 ENGINE_CMD_FLAG_NUMERIC},
 285         {CAPI_CMD_LOOKUP_METHOD,
 286                 "lookup_method",
 287                 "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
 288                 ENGINE_CMD_FLAG_NUMERIC},
 289         {CAPI_CMD_STORE_NAME,
 290                 "store_name",
 291                 "certificate store name, default \"MY\"",
 292                 ENGINE_CMD_FLAG_STRING},
 293         {CAPI_CMD_STORE_FLAGS,
 294                 "store_flags",
 295                 "Certificate store flags: 1 = system store",
 296                 ENGINE_CMD_FLAG_NUMERIC},
 297
 298         {0, NULL, NULL, 0}
 299         };
 300
 301 static int capi_idx = -1;
 302 static int rsa_capi_idx = -1;
 303 static int dsa_capi_idx = -1;
 304 static int cert_capi_idx = -1;
 305
 306 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 307         {
 308         int ret = 1;
 309         CAPI_CTX *ctx;
 310         BIO *out;
 311         if (capi_idx == -1)
 312                 {
 313                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
 314                 return 0;
 315                 }
 316         ctx = ENGINE_get_ex_data(e, capi_idx);
 317         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 318         switch (cmd)
 319                 {
 320                 case CAPI_CMD_LIST_CSPS:
 321                 ret = capi_list_providers(ctx, out);
 322                 break;
 323
 324                 case CAPI_CMD_LIST_CERTS:
 325                 ret = capi_list_certs(ctx, out, NULL);
 326                 break;
 327
 328                 case CAPI_CMD_LOOKUP_CERT:
 329                 ret = capi_list_certs(ctx, out, p);
 330                 break;
 331
 332                 case CAPI_CMD_LIST_CONTAINERS:
 333                 ret = capi_list_containers(ctx, out);
 334                 break;
 335
 336                 case CAPI_CMD_STORE_NAME:
 337                 if (ctx->storename)
 338                         OPENSSL_free(ctx->storename);
 339                 ctx->storename = BUF_strdup(p);
 340                 CAPI_trace(ctx, "Setting store name to %s\n", p);
 341                 break;
 342
 343                 case CAPI_CMD_STORE_FLAGS:
 344                 if (i & 1)
 345                         {
 346                         ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
 347                         ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
 348                         }
 349                 else
 350                         {
 351                         ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
 352                         ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
 353                         }
 354                 CAPI_trace(ctx, "Setting flags to %d\n", i);
 355                 break;
 356
 357                 case CAPI_CMD_DEBUG_LEVEL:
 358                 ctx->debug_level = (int)i;
 359                 CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
 360                 break;
 361
 362                 case CAPI_CMD_DEBUG_FILE:
 363                 ctx->debug_file = BUF_strdup(p);
 364                 CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
 365                 break;
 366
 367                 case CAPI_CMD_KEYTYPE:
 368                 ctx->keytype = i;
 369                 CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
 370                 break;
 371
 372                 case CAPI_CMD_SET_CSP_IDX:
 373                 ret = capi_ctx_set_provname_idx(ctx, i);
 374                 break;
 375
 376                 case CAPI_CMD_LIST_OPTIONS:
 377                 ctx->dump_flags = i;
 378                 break;
 379
 380                 case CAPI_CMD_LOOKUP_METHOD:
 381                 if (i < 1 || i > 3)
 382                         {
 383                         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
 384                         return 0;
 385                         }
 386                 ctx->lookup_method = i;
 387                 break;
 388
 389                 case CAPI_CMD_SET_CSP_NAME:
 390                 ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
 391                 break;
 392
 393                 case CAPI_CMD_SET_CSP_TYPE:
 394                 ctx->csptype = i;
 395                 break;
 396
 397                 default:
 398                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
 399                 ret = 0;
 400         }
 401
 402         BIO_free(out);
 403         return ret;
 404
 405         }
 406
 407 static RSA_METHOD capi_rsa_method =
 408         {
 409         "CryptoAPI RSA method",
 410         0,                              /* pub_enc */
 411         0,                              /* pub_dec */
 412         capi_rsa_priv_enc,              /* priv_enc */
 413         capi_rsa_priv_dec,              /* priv_dec */
 414         0,                              /* rsa_mod_exp */
 415         0,                              /* bn_mod_exp */
 416         0,                              /* init */
 417         capi_rsa_free,                  /* finish */
 418         RSA_FLAG_SIGN_VER,              /* flags */
 419         NULL,                           /* app_data */
 420         capi_rsa_sign,                  /* rsa_sign */
 421         0                               /* rsa_verify */
 422         };
 423
 424 static DSA_METHOD capi_dsa_method =
 425         {
 426         "CryptoAPI DSA method",
 427         capi_dsa_do_sign,               /* dsa_do_sign */
 428         0,                              /* dsa_sign_setup */
 429         0,                              /* dsa_do_verify */
 430         0,                              /* dsa_mod_exp */
 431         0,                              /* bn_mod_exp */
 432         0,                              /* init */
 433         capi_dsa_free,                  /* finish */
 434         0,                              /* flags */
 435         NULL,                           /* app_data */
 436         0,                              /* dsa_paramgen */
 437         0                               /* dsa_keygen */
 438         };
 439
 440 static int capi_init(ENGINE *e)
 441         {
 442         CAPI_CTX *ctx;
 443         const RSA_METHOD *ossl_rsa_meth;
 444         const DSA_METHOD *ossl_dsa_meth;
 445         capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 446         cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 447
 448         ctx = capi_ctx_new();
 449         if (!ctx || (capi_idx < 0))
 450                 goto memerr;
 451
 452         ENGINE_set_ex_data(e, capi_idx, ctx);
 453         /* Setup RSA_METHOD */
 454         rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 455         ossl_rsa_meth = RSA_PKCS1_SSLeay();
 456         capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 457         capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 458         capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 459         capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 460
 461         /* Setup DSA Method */
 462         dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 463         ossl_dsa_meth = DSA_OpenSSL();
 464         capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 465         capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 466         capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 467
 468 #ifdef OPENSSL_CAPIENG_DIALOG
 469         {
 470         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 471         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 472         if (cryptui)
 473                 ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
 474         if (kernel)
 475                 ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
 476         if (cryptui && !OPENSSL_isservice())
 477                 ctx->client_cert_select = cert_select_dialog;
 478         }
 479 #endif
 480
 481
 482         return 1;
 483
 484         memerr:
 485         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 486         return 0;
 487
 488         return 1;
 489         }
 490
 491 static int capi_destroy(ENGINE *e)
 492         {
 493         ERR_unload_CAPI_strings();
 494         return 1;
 495         }
 496
 497 static int capi_finish(ENGINE *e)
 498         {
 499         CAPI_CTX *ctx;
 500         ctx = ENGINE_get_ex_data(e, capi_idx);
 501         capi_ctx_free(ctx);
 502         ENGINE_set_ex_data(e, capi_idx, NULL);
 503         return 1;
 504         }
 505
 506
 507 /* CryptoAPI key application data. This contains
 508  * a handle to the private key container (for sign operations)
 509  * and a handle to the key (for decrypt operations).
 510  */
 511
 512 struct CAPI_KEY_st
 513         {
 514         /* Associated certificate context (if any) */
 515         PCCERT_CONTEXT pcert;
 516         HCRYPTPROV hprov;
 517         HCRYPTKEY key;
 518         DWORD keyspec;
 519         };
 520
 521 static int bind_capi(ENGINE *e)
 522         {
 523         if (!ENGINE_set_id(e, engine_capi_id)
 524                 || !ENGINE_set_name(e, engine_capi_name)
 525                 || !ENGINE_set_init_function(e, capi_init)
 526                 || !ENGINE_set_finish_function(e, capi_finish)
 527                 || !ENGINE_set_destroy_function(e, capi_destroy)
 528                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 529                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 530                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 531                 || !ENGINE_set_load_ssl_client_cert_function(e,
 532                                                 capi_load_ssl_client_cert)
 533                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 534                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 535                         return 0;
 536         ERR_load_CAPI_strings();
 537
 538         return 1;
 539
 540         }
 541
 542 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 543 static int bind_helper(ENGINE *e, const char *id)
 544         {
 545         if(id && (strcmp(id, engine_capi_id) != 0))
 546                 return 0;
 547         if(!bind_capi(e))
 548                 return 0;
 549         return 1;
 550         }
 551 IMPLEMENT_DYNAMIC_CHECK_FN()
 552 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 553 #else
 554 static ENGINE *engine_capi(void)
 555         {
 556         ENGINE *ret = ENGINE_new();
 557         if(!ret)
 558                 return NULL;
 559         if(!bind_capi(ret))
 560                 {
 561                 ENGINE_free(ret);
 562                 return NULL;
 563                 }
 564         return ret;
 565         }
 566
 567 void ENGINE_load_capi(void)
 568         {
 569         /* Copied from eng_[openssl|dyn].c */
 570         ENGINE *toadd = engine_capi();
 571         if(!toadd) return;
 572         ENGINE_add(toadd);
 573         ENGINE_free(toadd);
 574         ERR_clear_error();
 575         }
 576 #endif
 577
 578
 579 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 580         {
 581         int i;
 582         /* Reverse buffer in place: since this is a keyblob structure
 583          * that will be freed up after conversion anyway it doesn't
 584          * matter if we change it.
 585          */
 586         for(i = 0; i < binlen / 2; i++)
 587                 {
 588                 unsigned char c;
 589                 c = bin[i];
 590                 bin[i] = bin[binlen - i - 1];
 591                 bin[binlen - i - 1] = c;
 592                 }
 593
 594         if (!BN_bin2bn(bin, binlen, bn))
 595                 return 0;
 596         return 1;
 597         }
 598
 599 /* Given a CAPI_KEY get an EVP_PKEY structure */
 600
 601 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 602         {
 603         unsigned char *pubkey = NULL;
 604         DWORD len;
 605         BLOBHEADER *bh;
 606         RSA *rkey = NULL;
 607         DSA *dkey = NULL;
 608         EVP_PKEY *ret = NULL;
 609         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 610                 {
 611                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 612                 capi_addlasterror();
 613                 return NULL;
 614                 }
 615
 616         pubkey = OPENSSL_malloc(len);
 617
 618         if (!pubkey)
 619                 goto memerr;
 620
 621         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 622                 {
 623                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 624                 capi_addlasterror();
 625                 goto err;
 626                 }
 627
 628         bh = (BLOBHEADER *)pubkey;
 629         if (bh->bType != PUBLICKEYBLOB)
 630                 {
 631                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 632                 goto err;
 633                 }
 634         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 635                 {
 636                 RSAPUBKEY *rp;
 637                 DWORD rsa_modlen;
 638                 unsigned char *rsa_modulus;
 639                 rp = (RSAPUBKEY *)(bh + 1);
 640                 if (rp->magic != 0x31415352)
 641                         {
 642                         char magstr[10];
 643                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 644                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 645                         ERR_add_error_data(2, "magic=0x", magstr);
 646                         goto err;
 647                         }
 648                 rsa_modulus = (unsigned char *)(rp + 1);
 649                 rkey = RSA_new_method(eng);
 650                 if (!rkey)
 651                         goto memerr;
 652
 653                 rkey->e = BN_new();
 654                 rkey->n = BN_new();
 655
 656                 if (!rkey->e || !rkey->n)
 657                         goto memerr;
 658
 659                 if (!BN_set_word(rkey->e, rp->pubexp))
 660                         goto memerr;
 661
 662                 rsa_modlen = rp->bitlen / 8;
 663                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 664                         goto memerr;
 665
 666                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 667
 668                 if (!(ret = EVP_PKEY_new()))
 669                         goto memerr;
 670
 671                 EVP_PKEY_assign_RSA(ret, rkey);
 672                 rkey = NULL;
 673
 674                 }
 675         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 676                 {
 677                 DSSPUBKEY *dp;
 678                 DWORD dsa_plen;
 679                 unsigned char *btmp;
 680                 dp = (DSSPUBKEY *)(bh + 1);
 681                 if (dp->magic != 0x31535344)
 682                         {
 683                         char magstr[10];
 684                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 685                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 686                         ERR_add_error_data(2, "magic=0x", magstr);
 687                         goto err;
 688                         }
 689                 dsa_plen = dp->bitlen / 8;
 690                 btmp = (unsigned char *)(dp + 1);
 691                 dkey = DSA_new_method(eng);
 692                 if (!dkey)
 693                         goto memerr;
 694                 dkey->p = BN_new();
 695                 dkey->q = BN_new();
 696                 dkey->g = BN_new();
 697                 dkey->pub_key = BN_new();
 698                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 699                         goto memerr;
 700                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 701                         goto memerr;
 702                 btmp += dsa_plen;
 703                 if (!lend_tobn(dkey->q, btmp, 20))
 704                         goto memerr;
 705                 btmp += 20;
 706                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 707                         goto memerr;
 708                 btmp += dsa_plen;
 709                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 710                         goto memerr;
 711                 btmp += dsa_plen;
 712
 713                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 714
 715                 if (!(ret = EVP_PKEY_new()))
 716                         goto memerr;
 717
 718                 EVP_PKEY_assign_DSA(ret, dkey);
 719                 dkey = NULL;
 720                 }
 721         else
 722                 {
 723                 char algstr[10];
 724                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 725                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 726                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 727                 goto err;
 728                 }
 729
 730
 731         err:
 732         if (pubkey)
 733                 OPENSSL_free(pubkey);
 734         if (!ret)
 735                 {
 736                 if (rkey)
 737                         RSA_free(rkey);
 738                 if (dkey)
 739                         DSA_free(dkey);
 740                 }
 741
 742         return ret;
 743
 744 memerr:
 745         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 746         goto err;
 747
 748         }
 749
 750 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 751         UI_METHOD *ui_method, void *callback_data)
 752         {
 753         CAPI_CTX *ctx;
 754         CAPI_KEY *key;
 755         EVP_PKEY *ret;
 756         ctx = ENGINE_get_ex_data(eng, capi_idx);
 757
 758         if (!ctx)
 759                 {
 760                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 761                 return NULL;
 762                 }
 763
 764         key = capi_find_key(ctx, key_id);
 765
 766         if (!key)
 767                 return NULL;
 768
 769         ret = capi_get_pkey(eng, key);
 770
 771         if (!ret)
 772                 capi_free_key(key);
 773         return ret;
 774
 775         }
 776
 777 /* CryptoAPI RSA operations */
 778
 779 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 780                 unsigned char *to, RSA *rsa, int padding)
 781         {
 782         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 783         return -1;
 784         }
 785
 786 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 787              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 788         {
 789         ALG_ID alg;
 790         HCRYPTHASH hash;
 791         DWORD slen;
 792         unsigned int i;
 793         int ret = -1;
 794         CAPI_KEY *capi_key;
 795         CAPI_CTX *ctx;
 796
 797         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 798
 799         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 800
 801         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 802         if (!capi_key)
 803                 {
 804                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 805                 return -1;
 806                 }
 807 /* Convert the signature type to a CryptoAPI algorithm ID */
 808         switch(dtype)
 809                 {
 810         case NID_sha1:
 811                 alg = CALG_SHA1;
 812                 break;
 813
 814         case NID_md5:
 815                 alg = CALG_MD5;
 816                 break;
 817
 818         case NID_md5_sha1:
 819                 alg = CALG_SSL3_SHAMD5;
 820                 break;
 821         default:
 822                 {
 823                 char algstr[10];
 824                 BIO_snprintf(algstr, 10, "%lx", dtype);
 825                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 826                 ERR_add_error_data(2, "NID=0x", algstr);
 827                 return -1;
 828                 }
 829         }
 830
 831
 832
 833 /* Create the hash object */
 834         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 835                 {
 836                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 837                 capi_addlasterror();
 838                 return -1;
 839                 }
 840 /* Set the hash value to the value passed */
 841
 842         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 843                 {
 844                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 845                 capi_addlasterror();
 846                 goto err;
 847                 }
 848
 849
 850 /* Finally sign it */
 851         slen = RSA_size(rsa);
 852         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 853                 {
 854                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 855                 capi_addlasterror();
 856                 goto err;
 857                 }
 858         else
 859                 {
 860                 ret = 1;
 861                 /* Inplace byte reversal of signature */
 862                 for(i = 0; i < slen / 2; i++)
 863                         {
 864                         unsigned char c;
 865                         c = sigret[i];
 866                         sigret[i] = sigret[slen - i - 1];
 867                         sigret[slen - i - 1] = c;
 868                         }
 869                 *siglen = slen;
 870                 }
 871
 872         /* Now cleanup */
 873
 874 err:
 875         CryptDestroyHash(hash);
 876
 877         return ret;
 878         }
 879
 880 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 881                 unsigned char *to, RSA *rsa, int padding)
 882         {
 883         int i;
 884         unsigned char *tmpbuf;
 885         CAPI_KEY *capi_key;
 886         CAPI_CTX *ctx;
 887         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 888
 889         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 890
 891
 892         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 893         if (!capi_key)
 894                 {
 895                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 896                 return -1;
 897                 }
 898
 899         if(padding != RSA_PKCS1_PADDING)
 900                 {
 901                 char errstr[10];
 902                 BIO_snprintf(errstr, 10, "%d", padding);
 903                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 904                 ERR_add_error_data(2, "padding=", errstr);
 905                 return -1;
 906                 }
 907
 908         /* Create temp reverse order version of input */
 909         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 910                 {
 911                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 912                 return -1;
 913                 }
 914         for(i = 0; i < flen; i++)
 915                 tmpbuf[flen - i - 1] = from[i];
 916
 917         /* Finally decrypt it */
 918         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 919                 {
 920                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 921                 capi_addlasterror();
 922                 OPENSSL_free(tmpbuf);
 923                 return -1;
 924                 }
 925         else memcpy(to, tmpbuf, flen);
 926
 927         OPENSSL_free(tmpbuf);
 928
 929         return flen;
 930         }
 931
 932 static int capi_rsa_free(RSA *rsa)
 933         {
 934         CAPI_KEY *capi_key;
 935         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 936         capi_free_key(capi_key);
 937         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 938         return 1;
 939         }
 940
 941 /* CryptoAPI DSA operations */
 942
 943 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 944                                                                 DSA *dsa)
 945         {
 946         HCRYPTHASH hash;
 947         DWORD slen;
 948         DSA_SIG *ret = NULL;
 949         CAPI_KEY *capi_key;
 950         CAPI_CTX *ctx;
 951         unsigned char csigbuf[40];
 952
 953         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 954
 955         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 956
 957         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 958
 959         if (!capi_key)
 960                 {
 961                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 962                 return NULL;
 963                 }
 964
 965         if (dlen != 20)
 966                 {
 967                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 968                 return NULL;
 969                 }
 970
 971         /* Create the hash object */
 972         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
 973                 {
 974                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 975                 capi_addlasterror();
 976                 return NULL;
 977                 }
 978
 979         /* Set the hash value to the value passed */
 980         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
 981                 {
 982                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 983                 capi_addlasterror();
 984                 goto err;
 985                 }
 986
 987
 988         /* Finally sign it */
 989         slen = sizeof(csigbuf);
 990         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
 991                 {
 992                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 993                 capi_addlasterror();
 994                 goto err;
 995                 }
 996         else
 997                 {
 998                 ret = DSA_SIG_new();
 999                 if (!ret)
1000                         goto err;
1001                 ret->r = BN_new();
1002                 ret->s = BN_new();
1003                 if (!ret->r || !ret->s)
1004                         goto err;
1005                 if (!lend_tobn(ret->r, csigbuf, 20)
1006                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1007                         {
1008                         DSA_SIG_free(ret);
1009                         ret = NULL;
1010                         goto err;
1011                         }
1012                 }
1013
1014         /* Now cleanup */
1015
1016 err:
1017         OPENSSL_cleanse(csigbuf, 40);
1018         CryptDestroyHash(hash);
1019         return ret;
1020         }
1021
1022 static int capi_dsa_free(DSA *dsa)
1023         {
1024         CAPI_KEY *capi_key;
1025         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1026         capi_free_key(capi_key);
1027         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1028         return 1;
1029         }
1030
1031 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1032         {
1033         BIO *out;
1034
1035         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1036                 return;
1037         out = BIO_new_file(ctx->debug_file, "a+");
1038         BIO_vprintf(out, format, argptr);
1039         BIO_free(out);
1040         }
1041
1042 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1043         {
1044         va_list args;
1045         va_start(args, format);
1046         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1047         va_end(args);
1048         }
1049
1050 static void capi_addlasterror(void)
1051         {
1052         capi_adderror(GetLastError());
1053         }
1054
1055 static void capi_adderror(DWORD err)
1056         {
1057         char errstr[10];
1058         BIO_snprintf(errstr, 10, "%lX", err);
1059         ERR_add_error_data(2, "Error code= 0x", errstr);
1060         }
1061
1062 static char *wide_to_asc(LPWSTR wstr)
1063         {
1064         char *str;
1065         int len_0,sz;
1066
1067         if (!wstr)
1068                 return NULL;
1069         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1070         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1071         if (!sz)
1072                 {
1073                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1074                 return NULL;
1075                 }
1076         str = OPENSSL_malloc(sz);
1077         if (!str)
1078                 {
1079                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1080                 return NULL;
1081                 }
1082         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1083                 {
1084                 OPENSSL_free(str);
1085                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1086                 return NULL;
1087                 }
1088         return str;
1089         }
1090
1091 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1092         {
1093         LPSTR name;
1094         DWORD len, err;
1095         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1096         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
1097                 {
1098                 err = GetLastError();
1099                 if (err == ERROR_NO_MORE_ITEMS)
1100                         return 2;
1101                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1102                 capi_adderror(err);
1103                 return 0;
1104                 }
1105         name = OPENSSL_malloc(len);
1106         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
1107                 {
1108                 err = GetLastError();
1109                 if (err == ERROR_NO_MORE_ITEMS)
1110                         return 2;
1111                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1112                 capi_adderror(err);
1113                 return 0;
1114                 }
1115         *pname = name;
1116         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
1117
1118         return 1;
1119         }
1120
1121 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1122         {
1123         DWORD idx, ptype;
1124         int ret;
1125         LPSTR provname = NULL;
1126         CAPI_trace(ctx, "capi_list_providers\n");
1127         BIO_printf(out, "Available CSPs:\n");
1128         for(idx = 0; ; idx++)
1129                 {
1130                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1131                 if (ret == 2)
1132                         break;
1133                 if (ret == 0)
1134                         break;
1135                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1136                 OPENSSL_free(provname);
1137                 }
1138         return 1;
1139         }
1140
1141 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1142         {
1143         int ret = 1;
1144         HCRYPTPROV hprov;
1145         DWORD err, idx, flags, buflen = 0, clen;
1146         LPSTR cname;
1147         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1148         if (!CryptAcquireContextA(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1149                 {
1150                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1151                 capi_addlasterror();
1152                 return 0;
1153                 }
1154         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1155                 {
1156                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1157                 capi_addlasterror();
1158                 return 0;
1159                 }
1160         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1161         if (buflen == 0)
1162                 buflen = 1024;
1163         cname = OPENSSL_malloc(buflen);
1164         if (!cname)
1165                 {
1166                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1167                 goto err;
1168                 }
1169
1170         for (idx = 0;;idx++)
1171                 {
1172                 clen = buflen;
1173                 cname[0] = 0;
1174
1175                 if (idx == 0)
1176                         flags = CRYPT_FIRST;
1177                 else
1178                         flags = 0;
1179                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
1180                         {
1181                         err = GetLastError();
1182                         if (err == ERROR_NO_MORE_ITEMS)
1183                                 goto done;
1184                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1185                         capi_adderror(err);
1186                         goto err;
1187                         }
1188                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1189                 if (!cname[0] && (clen == buflen))
1190                         {
1191                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1192                         goto done;
1193                         }
1194                 BIO_printf(out, "%d. %s\n", idx, cname);
1195                 }
1196         err:
1197
1198         ret = 0;
1199
1200         done:
1201         if (cname)
1202                 OPENSSL_free(cname);
1203         CryptReleaseContext(hprov, 0);
1204
1205         return ret;
1206         }
1207
1208 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1209         {
1210         DWORD len;
1211         CRYPT_KEY_PROV_INFO *pinfo;
1212
1213         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1214                 return NULL;
1215         pinfo = OPENSSL_malloc(len);
1216         if (!pinfo)
1217                 {
1218                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1219                 return NULL;
1220                 }
1221         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1222                 {
1223                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1224                 capi_addlasterror();
1225                 OPENSSL_free(pinfo);
1226                 return NULL;
1227                 }
1228         return pinfo;
1229         }
1230
1231 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1232         {
1233         char *provname = NULL, *contname = NULL;
1234         if (!pinfo)
1235                 {
1236                 BIO_printf(out, "  No Private Key\n");
1237                 return;
1238                 }
1239         provname = wide_to_asc(pinfo->pwszProvName);
1240         contname = wide_to_asc(pinfo->pwszContainerName);
1241         if (!provname || !contname)
1242                 goto err;
1243
1244         BIO_printf(out, "  Private Key Info:\n");
1245         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1246         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1247         err:
1248         if (provname)
1249                 OPENSSL_free(provname);
1250         if (contname)
1251                 OPENSSL_free(contname);
1252         }
1253
1254 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1255         {
1256         LPWSTR wfname;
1257         DWORD dlen;
1258
1259         CAPI_trace(ctx, "capi_cert_get_fname\n");
1260         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1261                 return NULL;
1262         wfname = OPENSSL_malloc(dlen);
1263         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1264                 {
1265                 char *fname = wide_to_asc(wfname);
1266                 OPENSSL_free(wfname);
1267                 return fname;
1268                 }
1269         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1270         capi_addlasterror();
1271
1272         OPENSSL_free(wfname);
1273         return NULL;
1274         }
1275
1276
1277 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1278         {
1279         X509 *x;
1280         unsigned char *p;
1281         unsigned long flags = ctx->dump_flags;
1282         if (flags & CAPI_DMP_FNAME)
1283                 {
1284                 char *fname;
1285                 fname = capi_cert_get_fname(ctx, cert);
1286                 if (fname)
1287                         {
1288                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1289                         OPENSSL_free(fname);
1290                         }
1291                 else
1292                         BIO_printf(out, "  <No Friendly Name>\n");
1293                 }
1294
1295         p = cert->pbCertEncoded;
1296         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1297         if (!x)
1298                 BIO_printf(out, "  <Can't parse certificate>\n");
1299         if (flags & CAPI_DMP_SUMMARY)
1300                 {
1301                 BIO_printf(out, "  Subject: ");
1302                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1303                 BIO_printf(out, "\n  Issuer: ");
1304                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1305                 BIO_printf(out, "\n");
1306                 }
1307         if (flags & CAPI_DMP_FULL)
1308                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1309
1310         if (flags & CAPI_DMP_PKEYINFO)
1311                 {
1312                 CRYPT_KEY_PROV_INFO *pinfo;
1313                 pinfo = capi_get_prov_info(ctx, cert);
1314                 capi_dump_prov_info(ctx, out, pinfo);
1315                 if (pinfo)
1316                         OPENSSL_free(pinfo);
1317                 }
1318
1319         if (flags & CAPI_DMP_PEM)
1320                 PEM_write_bio_X509(out, x);
1321         X509_free(x);
1322         }
1323
1324 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1325         {
1326         HCERTSTORE hstore;
1327
1328         if (!storename)
1329                 storename = ctx->storename;
1330         if (!storename)
1331                 storename = "MY";
1332         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1333
1334         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1335                                 ctx->store_flags, storename);
1336         if (!hstore)
1337                 {
1338                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1339                 capi_addlasterror();
1340                 }
1341         return hstore;
1342         }
1343
1344 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1345         {
1346         char *storename;
1347         int idx;
1348         int ret = 1;
1349         HCERTSTORE hstore;
1350         PCCERT_CONTEXT cert = NULL;
1351
1352         storename = ctx->storename;
1353         if (!storename)
1354                 storename = "MY";
1355         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1356
1357         hstore = capi_open_store(ctx, storename);
1358         if (!hstore)
1359                 return 0;
1360         if (id)
1361                 {
1362                 cert = capi_find_cert(ctx, id, hstore);
1363                 if (!cert)
1364                         {
1365                         ret = 0;
1366                         goto err;
1367                         }
1368                 capi_dump_cert(ctx, out, cert);
1369                 CertFreeCertificateContext(cert);
1370                 }
1371         else
1372                 {
1373                 for(idx = 0;;idx++)
1374                         {
1375                         LPWSTR fname = NULL;
1376                         cert = CertEnumCertificatesInStore(hstore, cert);
1377                         if (!cert)
1378                                 break;
1379                         BIO_printf(out, "Certificate %d\n", idx);
1380                         capi_dump_cert(ctx, out, cert);
1381                         }
1382                 }
1383         err:
1384         CertCloseStore(hstore, 0);
1385         return ret;
1386         }
1387
1388 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1389         {
1390         PCCERT_CONTEXT cert = NULL;
1391         char *fname = NULL;
1392         int match;
1393         switch(ctx->lookup_method)
1394                 {
1395                 case CAPI_LU_SUBSTR:
1396                         return CertFindCertificateInStore(hstore,
1397                                         X509_ASN_ENCODING, 0,
1398                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1399                 case CAPI_LU_FNAME:
1400                         for(;;)
1401                                 {
1402                                 cert = CertEnumCertificatesInStore(hstore, cert);
1403                                 if (!cert)
1404                                         return NULL;
1405                                 fname = capi_cert_get_fname(ctx, cert);
1406                                 if (fname)
1407                                         {
1408                                         if (strcmp(fname, id))
1409                                                 match = 0;
1410                                         else
1411                                                 match = 1;
1412                                         OPENSSL_free(fname);
1413                                         if (match)
1414                                                 return cert;
1415                                         }
1416                                 }
1417                 default:
1418                         return NULL;
1419                 }
1420         }
1421
1422 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
1423         {
1424         CAPI_KEY *key;
1425         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1426         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1427                                                 contname, provname, ptype);
1428         if (!CryptAcquireContextA(&key->hprov, contname, provname, ptype, 0))
1429                 {
1430                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1431                 capi_addlasterror();
1432                 goto err;
1433                 }
1434         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1435                 {
1436                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1437                 capi_addlasterror();
1438                 CryptReleaseContext(key->hprov, 0);
1439                 goto err;
1440                 }
1441         key->keyspec = keyspec;
1442         key->pcert = NULL;
1443         return key;
1444
1445         err:
1446         OPENSSL_free(key);
1447         return NULL;
1448         }
1449
1450 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1451         {
1452         CAPI_KEY *key = NULL;
1453         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1454         char *provname = NULL, *contname = NULL;
1455         pinfo = capi_get_prov_info(ctx, cert);
1456         if (!pinfo)
1457                 goto err;
1458         provname = wide_to_asc(pinfo->pwszProvName);
1459         contname = wide_to_asc(pinfo->pwszContainerName);
1460         if (!provname || !contname)
1461                 goto err;
1462         key = capi_get_key(ctx, contname, provname,
1463                                 pinfo->dwProvType, pinfo->dwKeySpec);
1464
1465         err:
1466         if (pinfo)
1467                 OPENSSL_free(pinfo);
1468         if (provname)
1469                 OPENSSL_free(provname);
1470         if (contname)
1471                 OPENSSL_free(contname);
1472         return key;
1473         }
1474
1475 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1476         {
1477         PCCERT_CONTEXT cert;
1478         HCERTSTORE hstore;
1479         CAPI_KEY *key = NULL;
1480         switch (ctx->lookup_method)
1481                 {
1482                 case CAPI_LU_SUBSTR:
1483                 case CAPI_LU_FNAME:
1484                 hstore = capi_open_store(ctx, NULL);
1485                 if (!hstore)
1486                         return NULL;
1487                 cert = capi_find_cert(ctx, id, hstore);
1488                 if (cert)
1489                         {
1490                         key = capi_get_cert_key(ctx, cert);
1491                         CertFreeCertificateContext(cert);
1492                         }
1493                 CertCloseStore(hstore, 0);
1494                 break;
1495
1496                 case CAPI_LU_CONTNAME:
1497                 key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
1498                                                         ctx->keytype);
1499                 break;
1500                 }
1501
1502         return key;
1503         }
1504
1505 void capi_free_key(CAPI_KEY *key)
1506         {
1507         if (!key)
1508                 return;
1509         CryptDestroyKey(key->key);
1510         CryptReleaseContext(key->hprov, 0);
1511         if (key->pcert)
1512                 CertFreeCertificateContext(key->pcert);
1513         OPENSSL_free(key);
1514         }
1515
1516
1517 /* Initialize a CAPI_CTX structure */
1518
1519 static CAPI_CTX *capi_ctx_new()
1520         {
1521         CAPI_CTX *ctx;
1522         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1523         if (!ctx)
1524                 {
1525                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1526                 return NULL;
1527                 }
1528         ctx->cspname = NULL;
1529         ctx->csptype = PROV_RSA_FULL;
1530         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1531         ctx->keytype = AT_KEYEXCHANGE;
1532         ctx->storename = NULL;
1533         ctx->ssl_client_store = NULL;
1534         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1535                                 CERT_STORE_READONLY_FLAG |
1536                                 CERT_SYSTEM_STORE_CURRENT_USER;
1537         ctx->lookup_method = CAPI_LU_SUBSTR;
1538         ctx->debug_level = 0;
1539         ctx->debug_file = NULL;
1540         ctx->client_cert_select = cert_select_simple;
1541         return ctx;
1542         }
1543
1544 static void capi_ctx_free(CAPI_CTX *ctx)
1545         {
1546         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1547         if (!ctx)
1548                 return;
1549         if (ctx->cspname)
1550                 OPENSSL_free(ctx->cspname);
1551         if (ctx->debug_file)
1552                 OPENSSL_free(ctx->debug_file);
1553         if (ctx->storename)
1554                 OPENSSL_free(ctx->storename);
1555         if (ctx->ssl_client_store)
1556                 OPENSSL_free(ctx->ssl_client_store);
1557         OPENSSL_free(ctx);
1558         }
1559
1560 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1561         {
1562         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1563         if (check)
1564                 {
1565                 HCRYPTPROV hprov;
1566                 if (!CryptAcquireContextA(&hprov, NULL, pname, type,
1567                                                 CRYPT_VERIFYCONTEXT))
1568                         {
1569                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1570                         capi_addlasterror();
1571                         return 0;
1572                         }
1573                 CryptReleaseContext(hprov, 0);
1574                 }
1575         ctx->cspname = BUF_strdup(pname);
1576         ctx->csptype = type;
1577         return 1;
1578         }
1579
1580 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1581         {
1582         LPSTR pname;
1583         DWORD type;
1584         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1585                 return 0;
1586         return capi_ctx_set_provname(ctx, pname, type, 0);
1587         }
1588
1589 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1590         {
1591         int i;
1592         X509_NAME *nm;
1593         /* Special case: empty list: match anything */
1594         if (sk_X509_NAME_num(ca_dn) <= 0)
1595                 return 1;
1596         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1597                 {
1598                 nm = sk_X509_NAME_value(ca_dn, i);
1599                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1600                                 return 1;
1601                 }
1602         return 0;
1603         }
1604
1605
1606
1607 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1608         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1609         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1610         {
1611         STACK_OF(X509) *certs = NULL;
1612         X509 *x;
1613         char *storename;
1614         const char *p;
1615         int i, client_cert_idx;
1616         HCERTSTORE hstore;
1617         PCCERT_CONTEXT cert = NULL, excert = NULL;
1618         CAPI_CTX *ctx;
1619         CAPI_KEY *key;
1620         ctx = ENGINE_get_ex_data(e, capi_idx);
1621
1622         *pcert = NULL;
1623         *pkey = NULL;
1624
1625         storename = ctx->ssl_client_store;
1626         if (!storename)
1627                 storename = "MY";
1628
1629         hstore = capi_open_store(ctx, storename);
1630         if (!hstore)
1631                 return 0;
1632         /* Enumerate all certificates collect any matches */
1633         for(i = 0;;i++)
1634                 {
1635                 cert = CertEnumCertificatesInStore(hstore, cert);
1636                 if (!cert)
1637                         break;
1638                 p = cert->pbCertEncoded;
1639                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1640                 if (!x)
1641                         {
1642                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1643                         continue;
1644                         }
1645                 if (cert_issuer_match(ca_dn, x)
1646                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1647                         {
1648                         key = capi_get_cert_key(ctx, cert);
1649                         if (!key)
1650                                 {
1651                                 X509_free(x);
1652                                 continue;
1653                                 }
1654                         /* Match found: attach extra data to it so
1655                          * we can retrieve the key later.
1656                          */
1657                         excert = CertDuplicateCertificateContext(cert);
1658                         key->pcert = excert;
1659                         X509_set_ex_data(x, cert_capi_idx, key);
1660
1661                         if (!certs)
1662                                 certs = sk_X509_new_null();
1663
1664                         sk_X509_push(certs, x);
1665                         }
1666                 else
1667                         X509_free(x);
1668
1669                 }
1670
1671         if (cert)
1672                 CertFreeCertificateContext(cert);
1673         if (hstore)
1674                 CertCloseStore(hstore, 0);
1675
1676         if (!certs)
1677                 return 0;
1678
1679
1680         /* Select the appropriate certificate */
1681
1682         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1683
1684         /* Set the selected certificate and free the rest */
1685
1686         for(i = 0; i < sk_X509_num(certs); i++)
1687                 {
1688                 x = sk_X509_value(certs, i);
1689                 if (i == client_cert_idx)
1690                         *pcert = x;
1691                 else
1692                         {
1693                         key = X509_get_ex_data(x, cert_capi_idx);
1694                         capi_free_key(key);
1695                         X509_free(x);
1696                         }
1697                 }
1698
1699         sk_X509_free(certs);
1700
1701         if (!*pcert)
1702                 return 0;
1703
1704         /* Setup key for selected certificate */
1705
1706         key = X509_get_ex_data(*pcert, cert_capi_idx);
1707         *pkey = capi_get_pkey(e, key);
1708         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1709
1710         return 1;
1711
1712         }
1713
1714
1715 /* Simple client cert selection function: always select first */
1716
1717 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1718         {
1719         return 0;
1720         }
1721
1722 #ifdef OPENSSL_CAPIENG_DIALOG
1723
1724 /* More complex cert selection function, using standard function
1725  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1726  */
1727
1728 /* Definitions which are in cryptuiapi.h but this is not present in older
1729  * versions of headers.
1730  */
1731
1732 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1733 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1734 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1735 #endif
1736
1737 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1738 #define dlg_prompt L"Select a certificate to use for authentication"
1739 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1740                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1741
1742 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1743         {
1744         X509 *x;
1745         HCERTSTORE dstore;
1746         PCCERT_CONTEXT cert;
1747         CAPI_CTX *ctx;
1748         CAPI_KEY *key;
1749         HWND hwnd;
1750         int i, idx = -1;
1751         if (sk_X509_num(certs) == 1)
1752                 return 0;
1753         ctx = ENGINE_get_ex_data(e, capi_idx);
1754         /* Create an in memory store of certificates */
1755         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1756                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1757         if (!dstore)
1758                 {
1759                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1760                 capi_addlasterror();
1761                 goto err;
1762                 }
1763         /* Add all certificates to store */
1764         for(i = 0; i < sk_X509_num(certs); i++)
1765                 {
1766                 x = sk_X509_value(certs, i);
1767                 key = X509_get_ex_data(x, cert_capi_idx);
1768
1769                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1770                                                 CERT_STORE_ADD_NEW, NULL))
1771                         {
1772                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1773                         capi_addlasterror();
1774                         goto err;
1775                         }
1776
1777                 }
1778         hwnd = GetForegroundWindow();
1779         if (!hwnd)
1780                 hwnd = GetActiveWindow();
1781         if (!hwnd && ctx->getconswindow)
1782                 hwnd = ctx->getconswindow();
1783         /* Call dialog to select one */
1784         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1785                                                 dlg_columns, 0, NULL);
1786
1787         /* Find matching cert from list */
1788         if (cert)
1789                 {
1790                 for(i = 0; i < sk_X509_num(certs); i++)
1791                         {
1792                         x = sk_X509_value(certs, i);
1793                         key = X509_get_ex_data(x, cert_capi_idx);
1794                         if (CertCompareCertificate(
1795                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1796                                         cert->pCertInfo,
1797                                         key->pcert->pCertInfo))
1798                                 {
1799                                 idx = i;
1800                                 break;
1801                                 }
1802                         }
1803                 }
1804
1805         err:
1806         if (dstore)
1807                 CertCloseStore(dstore, 0);
1808         return idx;
1809
1810         }
1811 #endif
1812
1813 #else /* !__COMPILE_CAPIENG */
1814 #include <openssl/engine.h>
1815 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1816 OPENSSL_EXPORT
1817 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1818 IMPLEMENT_DYNAMIC_CHECK_FN()
1819 #else
1820 void ENGINE_load_capi(void){}
1821 #endif
1822 #endif