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_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL)
 526                 || !ENGINE_set_init_function(e, capi_init)
 527                 || !ENGINE_set_finish_function(e, capi_finish)
 528                 || !ENGINE_set_destroy_function(e, capi_destroy)
 529                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 530                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 531                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 532                 || !ENGINE_set_load_ssl_client_cert_function(e,
 533                                                 capi_load_ssl_client_cert)
 534                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 535                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 536                         return 0;
 537         ERR_load_CAPI_strings();
 538
 539         return 1;
 540
 541         }
 542
 543 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 544 static int bind_helper(ENGINE *e, const char *id)
 545         {
 546         if(id && (strcmp(id, engine_capi_id) != 0))
 547                 return 0;
 548         if(!bind_capi(e))
 549                 return 0;
 550         return 1;
 551         }
 552 IMPLEMENT_DYNAMIC_CHECK_FN()
 553 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 554 #else
 555 static ENGINE *engine_capi(void)
 556         {
 557         ENGINE *ret = ENGINE_new();
 558         if(!ret)
 559                 return NULL;
 560         if(!bind_capi(ret))
 561                 {
 562                 ENGINE_free(ret);
 563                 return NULL;
 564                 }
 565         return ret;
 566         }
 567
 568 void ENGINE_load_capi(void)
 569         {
 570         /* Copied from eng_[openssl|dyn].c */
 571         ENGINE *toadd = engine_capi();
 572         if(!toadd) return;
 573         ENGINE_add(toadd);
 574         ENGINE_free(toadd);
 575         ERR_clear_error();
 576         }
 577 #endif
 578
 579
 580 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 581         {
 582         int i;
 583         /* Reverse buffer in place: since this is a keyblob structure
 584          * that will be freed up after conversion anyway it doesn't
 585          * matter if we change it.
 586          */
 587         for(i = 0; i < binlen / 2; i++)
 588                 {
 589                 unsigned char c;
 590                 c = bin[i];
 591                 bin[i] = bin[binlen - i - 1];
 592                 bin[binlen - i - 1] = c;
 593                 }
 594
 595         if (!BN_bin2bn(bin, binlen, bn))
 596                 return 0;
 597         return 1;
 598         }
 599
 600 /* Given a CAPI_KEY get an EVP_PKEY structure */
 601
 602 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 603         {
 604         unsigned char *pubkey = NULL;
 605         DWORD len;
 606         BLOBHEADER *bh;
 607         RSA *rkey = NULL;
 608         DSA *dkey = NULL;
 609         EVP_PKEY *ret = NULL;
 610         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 611                 {
 612                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 613                 capi_addlasterror();
 614                 return NULL;
 615                 }
 616
 617         pubkey = OPENSSL_malloc(len);
 618
 619         if (!pubkey)
 620                 goto memerr;
 621
 622         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 623                 {
 624                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 625                 capi_addlasterror();
 626                 goto err;
 627                 }
 628
 629         bh = (BLOBHEADER *)pubkey;
 630         if (bh->bType != PUBLICKEYBLOB)
 631                 {
 632                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 633                 goto err;
 634                 }
 635         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 636                 {
 637                 RSAPUBKEY *rp;
 638                 DWORD rsa_modlen;
 639                 unsigned char *rsa_modulus;
 640                 rp = (RSAPUBKEY *)(bh + 1);
 641                 if (rp->magic != 0x31415352)
 642                         {
 643                         char magstr[10];
 644                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 645                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 646                         ERR_add_error_data(2, "magic=0x", magstr);
 647                         goto err;
 648                         }
 649                 rsa_modulus = (unsigned char *)(rp + 1);
 650                 rkey = RSA_new_method(eng);
 651                 if (!rkey)
 652                         goto memerr;
 653
 654                 rkey->e = BN_new();
 655                 rkey->n = BN_new();
 656
 657                 if (!rkey->e || !rkey->n)
 658                         goto memerr;
 659
 660                 if (!BN_set_word(rkey->e, rp->pubexp))
 661                         goto memerr;
 662
 663                 rsa_modlen = rp->bitlen / 8;
 664                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 665                         goto memerr;
 666
 667                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 668
 669                 if (!(ret = EVP_PKEY_new()))
 670                         goto memerr;
 671
 672                 EVP_PKEY_assign_RSA(ret, rkey);
 673                 rkey = NULL;
 674
 675                 }
 676         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 677                 {
 678                 DSSPUBKEY *dp;
 679                 DWORD dsa_plen;
 680                 unsigned char *btmp;
 681                 dp = (DSSPUBKEY *)(bh + 1);
 682                 if (dp->magic != 0x31535344)
 683                         {
 684                         char magstr[10];
 685                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 686                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 687                         ERR_add_error_data(2, "magic=0x", magstr);
 688                         goto err;
 689                         }
 690                 dsa_plen = dp->bitlen / 8;
 691                 btmp = (unsigned char *)(dp + 1);
 692                 dkey = DSA_new_method(eng);
 693                 if (!dkey)
 694                         goto memerr;
 695                 dkey->p = BN_new();
 696                 dkey->q = BN_new();
 697                 dkey->g = BN_new();
 698                 dkey->pub_key = BN_new();
 699                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 700                         goto memerr;
 701                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 702                         goto memerr;
 703                 btmp += dsa_plen;
 704                 if (!lend_tobn(dkey->q, btmp, 20))
 705                         goto memerr;
 706                 btmp += 20;
 707                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 708                         goto memerr;
 709                 btmp += dsa_plen;
 710                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 711                         goto memerr;
 712                 btmp += dsa_plen;
 713
 714                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 715
 716                 if (!(ret = EVP_PKEY_new()))
 717                         goto memerr;
 718
 719                 EVP_PKEY_assign_DSA(ret, dkey);
 720                 dkey = NULL;
 721                 }
 722         else
 723                 {
 724                 char algstr[10];
 725                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 726                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 727                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 728                 goto err;
 729                 }
 730
 731
 732         err:
 733         if (pubkey)
 734                 OPENSSL_free(pubkey);
 735         if (!ret)
 736                 {
 737                 if (rkey)
 738                         RSA_free(rkey);
 739                 if (dkey)
 740                         DSA_free(dkey);
 741                 }
 742
 743         return ret;
 744
 745 memerr:
 746         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 747         goto err;
 748
 749         }
 750
 751 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 752         UI_METHOD *ui_method, void *callback_data)
 753         {
 754         CAPI_CTX *ctx;
 755         CAPI_KEY *key;
 756         EVP_PKEY *ret;
 757         ctx = ENGINE_get_ex_data(eng, capi_idx);
 758
 759         if (!ctx)
 760                 {
 761                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 762                 return NULL;
 763                 }
 764
 765         key = capi_find_key(ctx, key_id);
 766
 767         if (!key)
 768                 return NULL;
 769
 770         ret = capi_get_pkey(eng, key);
 771
 772         if (!ret)
 773                 capi_free_key(key);
 774         return ret;
 775
 776         }
 777
 778 /* CryptoAPI RSA operations */
 779
 780 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 781                 unsigned char *to, RSA *rsa, int padding)
 782         {
 783         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 784         return -1;
 785         }
 786
 787 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 788              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 789         {
 790         ALG_ID alg;
 791         HCRYPTHASH hash;
 792         DWORD slen;
 793         unsigned int i;
 794         int ret = -1;
 795         CAPI_KEY *capi_key;
 796         CAPI_CTX *ctx;
 797
 798         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 799
 800         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 801
 802         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 803         if (!capi_key)
 804                 {
 805                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 806                 return -1;
 807                 }
 808 /* Convert the signature type to a CryptoAPI algorithm ID */
 809         switch(dtype)
 810                 {
 811         case NID_sha1:
 812                 alg = CALG_SHA1;
 813                 break;
 814
 815         case NID_md5:
 816                 alg = CALG_MD5;
 817                 break;
 818
 819         case NID_md5_sha1:
 820                 alg = CALG_SSL3_SHAMD5;
 821                 break;
 822         default:
 823                 {
 824                 char algstr[10];
 825                 BIO_snprintf(algstr, 10, "%lx", dtype);
 826                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 827                 ERR_add_error_data(2, "NID=0x", algstr);
 828                 return -1;
 829                 }
 830         }
 831
 832
 833
 834 /* Create the hash object */
 835         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 836                 {
 837                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 838                 capi_addlasterror();
 839                 return -1;
 840                 }
 841 /* Set the hash value to the value passed */
 842
 843         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 844                 {
 845                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 846                 capi_addlasterror();
 847                 goto err;
 848                 }
 849
 850
 851 /* Finally sign it */
 852         slen = RSA_size(rsa);
 853         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 854                 {
 855                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 856                 capi_addlasterror();
 857                 goto err;
 858                 }
 859         else
 860                 {
 861                 ret = 1;
 862                 /* Inplace byte reversal of signature */
 863                 for(i = 0; i < slen / 2; i++)
 864                         {
 865                         unsigned char c;
 866                         c = sigret[i];
 867                         sigret[i] = sigret[slen - i - 1];
 868                         sigret[slen - i - 1] = c;
 869                         }
 870                 *siglen = slen;
 871                 }
 872
 873         /* Now cleanup */
 874
 875 err:
 876         CryptDestroyHash(hash);
 877
 878         return ret;
 879         }
 880
 881 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 882                 unsigned char *to, RSA *rsa, int padding)
 883         {
 884         int i;
 885         unsigned char *tmpbuf;
 886         CAPI_KEY *capi_key;
 887         CAPI_CTX *ctx;
 888         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 889
 890         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 891
 892
 893         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 894         if (!capi_key)
 895                 {
 896                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 897                 return -1;
 898                 }
 899
 900         if(padding != RSA_PKCS1_PADDING)
 901                 {
 902                 char errstr[10];
 903                 BIO_snprintf(errstr, 10, "%d", padding);
 904                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 905                 ERR_add_error_data(2, "padding=", errstr);
 906                 return -1;
 907                 }
 908
 909         /* Create temp reverse order version of input */
 910         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 911                 {
 912                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 913                 return -1;
 914                 }
 915         for(i = 0; i < flen; i++)
 916                 tmpbuf[flen - i - 1] = from[i];
 917
 918         /* Finally decrypt it */
 919         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 920                 {
 921                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 922                 capi_addlasterror();
 923                 OPENSSL_free(tmpbuf);
 924                 return -1;
 925                 }
 926         else memcpy(to, tmpbuf, flen);
 927
 928         OPENSSL_free(tmpbuf);
 929
 930         return flen;
 931         }
 932
 933 static int capi_rsa_free(RSA *rsa)
 934         {
 935         CAPI_KEY *capi_key;
 936         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 937         capi_free_key(capi_key);
 938         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 939         return 1;
 940         }
 941
 942 /* CryptoAPI DSA operations */
 943
 944 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 945                                                                 DSA *dsa)
 946         {
 947         HCRYPTHASH hash;
 948         DWORD slen;
 949         DSA_SIG *ret = NULL;
 950         CAPI_KEY *capi_key;
 951         CAPI_CTX *ctx;
 952         unsigned char csigbuf[40];
 953
 954         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 955
 956         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 957
 958         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 959
 960         if (!capi_key)
 961                 {
 962                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 963                 return NULL;
 964                 }
 965
 966         if (dlen != 20)
 967                 {
 968                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 969                 return NULL;
 970                 }
 971
 972         /* Create the hash object */
 973         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
 974                 {
 975                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 976                 capi_addlasterror();
 977                 return NULL;
 978                 }
 979
 980         /* Set the hash value to the value passed */
 981         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
 982                 {
 983                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 984                 capi_addlasterror();
 985                 goto err;
 986                 }
 987
 988
 989         /* Finally sign it */
 990         slen = sizeof(csigbuf);
 991         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
 992                 {
 993                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 994                 capi_addlasterror();
 995                 goto err;
 996                 }
 997         else
 998                 {
 999                 ret = DSA_SIG_new();
1000                 if (!ret)
1001                         goto err;
1002                 ret->r = BN_new();
1003                 ret->s = BN_new();
1004                 if (!ret->r || !ret->s)
1005                         goto err;
1006                 if (!lend_tobn(ret->r, csigbuf, 20)
1007                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1008                         {
1009                         DSA_SIG_free(ret);
1010                         ret = NULL;
1011                         goto err;
1012                         }
1013                 }
1014
1015         /* Now cleanup */
1016
1017 err:
1018         OPENSSL_cleanse(csigbuf, 40);
1019         CryptDestroyHash(hash);
1020         return ret;
1021         }
1022
1023 static int capi_dsa_free(DSA *dsa)
1024         {
1025         CAPI_KEY *capi_key;
1026         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1027         capi_free_key(capi_key);
1028         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1029         return 1;
1030         }
1031
1032 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1033         {
1034         BIO *out;
1035
1036         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1037                 return;
1038         out = BIO_new_file(ctx->debug_file, "a+");
1039         BIO_vprintf(out, format, argptr);
1040         BIO_free(out);
1041         }
1042
1043 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1044         {
1045         va_list args;
1046         va_start(args, format);
1047         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1048         va_end(args);
1049         }
1050
1051 static void capi_addlasterror(void)
1052         {
1053         capi_adderror(GetLastError());
1054         }
1055
1056 static void capi_adderror(DWORD err)
1057         {
1058         char errstr[10];
1059         BIO_snprintf(errstr, 10, "%lX", err);
1060         ERR_add_error_data(2, "Error code= 0x", errstr);
1061         }
1062
1063 static char *wide_to_asc(LPWSTR wstr)
1064         {
1065         char *str;
1066         int len_0,sz;
1067
1068         if (!wstr)
1069                 return NULL;
1070         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1071         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1072         if (!sz)
1073                 {
1074                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1075                 return NULL;
1076                 }
1077         str = OPENSSL_malloc(sz);
1078         if (!str)
1079                 {
1080                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1081                 return NULL;
1082                 }
1083         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1084                 {
1085                 OPENSSL_free(str);
1086                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1087                 return NULL;
1088                 }
1089         return str;
1090         }
1091
1092 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1093         {
1094         LPSTR name;
1095         DWORD len, err;
1096         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1097         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
1098                 {
1099                 err = GetLastError();
1100                 if (err == ERROR_NO_MORE_ITEMS)
1101                         return 2;
1102                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1103                 capi_adderror(err);
1104                 return 0;
1105                 }
1106         name = OPENSSL_malloc(len);
1107         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
1108                 {
1109                 err = GetLastError();
1110                 if (err == ERROR_NO_MORE_ITEMS)
1111                         return 2;
1112                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1113                 capi_adderror(err);
1114                 return 0;
1115                 }
1116         *pname = name;
1117         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
1118
1119         return 1;
1120         }
1121
1122 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1123         {
1124         DWORD idx, ptype;
1125         int ret;
1126         LPSTR provname = NULL;
1127         CAPI_trace(ctx, "capi_list_providers\n");
1128         BIO_printf(out, "Available CSPs:\n");
1129         for(idx = 0; ; idx++)
1130                 {
1131                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1132                 if (ret == 2)
1133                         break;
1134                 if (ret == 0)
1135                         break;
1136                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1137                 OPENSSL_free(provname);
1138                 }
1139         return 1;
1140         }
1141
1142 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1143         {
1144         int ret = 1;
1145         HCRYPTPROV hprov;
1146         DWORD err, idx, flags, buflen = 0, clen;
1147         LPSTR cname;
1148         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1149         if (!CryptAcquireContextA(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1150                 {
1151                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1152                 capi_addlasterror();
1153                 return 0;
1154                 }
1155         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1156                 {
1157                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1158                 capi_addlasterror();
1159                 return 0;
1160                 }
1161         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1162         if (buflen == 0)
1163                 buflen = 1024;
1164         cname = OPENSSL_malloc(buflen);
1165         if (!cname)
1166                 {
1167                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1168                 goto err;
1169                 }
1170
1171         for (idx = 0;;idx++)
1172                 {
1173                 clen = buflen;
1174                 cname[0] = 0;
1175
1176                 if (idx == 0)
1177                         flags = CRYPT_FIRST;
1178                 else
1179                         flags = 0;
1180                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
1181                         {
1182                         err = GetLastError();
1183                         if (err == ERROR_NO_MORE_ITEMS)
1184                                 goto done;
1185                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1186                         capi_adderror(err);
1187                         goto err;
1188                         }
1189                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1190                 if (!cname[0] && (clen == buflen))
1191                         {
1192                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1193                         goto done;
1194                         }
1195                 BIO_printf(out, "%d. %s\n", idx, cname);
1196                 }
1197         err:
1198
1199         ret = 0;
1200
1201         done:
1202         if (cname)
1203                 OPENSSL_free(cname);
1204         CryptReleaseContext(hprov, 0);
1205
1206         return ret;
1207         }
1208
1209 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1210         {
1211         DWORD len;
1212         CRYPT_KEY_PROV_INFO *pinfo;
1213
1214         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1215                 return NULL;
1216         pinfo = OPENSSL_malloc(len);
1217         if (!pinfo)
1218                 {
1219                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1220                 return NULL;
1221                 }
1222         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1223                 {
1224                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1225                 capi_addlasterror();
1226                 OPENSSL_free(pinfo);
1227                 return NULL;
1228                 }
1229         return pinfo;
1230         }
1231
1232 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1233         {
1234         char *provname = NULL, *contname = NULL;
1235         if (!pinfo)
1236                 {
1237                 BIO_printf(out, "  No Private Key\n");
1238                 return;
1239                 }
1240         provname = wide_to_asc(pinfo->pwszProvName);
1241         contname = wide_to_asc(pinfo->pwszContainerName);
1242         if (!provname || !contname)
1243                 goto err;
1244
1245         BIO_printf(out, "  Private Key Info:\n");
1246         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1247         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1248         err:
1249         if (provname)
1250                 OPENSSL_free(provname);
1251         if (contname)
1252                 OPENSSL_free(contname);
1253         }
1254
1255 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1256         {
1257         LPWSTR wfname;
1258         DWORD dlen;
1259
1260         CAPI_trace(ctx, "capi_cert_get_fname\n");
1261         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1262                 return NULL;
1263         wfname = OPENSSL_malloc(dlen);
1264         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1265                 {
1266                 char *fname = wide_to_asc(wfname);
1267                 OPENSSL_free(wfname);
1268                 return fname;
1269                 }
1270         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1271         capi_addlasterror();
1272
1273         OPENSSL_free(wfname);
1274         return NULL;
1275         }
1276
1277
1278 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1279         {
1280         X509 *x;
1281         unsigned char *p;
1282         unsigned long flags = ctx->dump_flags;
1283         if (flags & CAPI_DMP_FNAME)
1284                 {
1285                 char *fname;
1286                 fname = capi_cert_get_fname(ctx, cert);
1287                 if (fname)
1288                         {
1289                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1290                         OPENSSL_free(fname);
1291                         }
1292                 else
1293                         BIO_printf(out, "  <No Friendly Name>\n");
1294                 }
1295
1296         p = cert->pbCertEncoded;
1297         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1298         if (!x)
1299                 BIO_printf(out, "  <Can't parse certificate>\n");
1300         if (flags & CAPI_DMP_SUMMARY)
1301                 {
1302                 BIO_printf(out, "  Subject: ");
1303                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1304                 BIO_printf(out, "\n  Issuer: ");
1305                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1306                 BIO_printf(out, "\n");
1307                 }
1308         if (flags & CAPI_DMP_FULL)
1309                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1310
1311         if (flags & CAPI_DMP_PKEYINFO)
1312                 {
1313                 CRYPT_KEY_PROV_INFO *pinfo;
1314                 pinfo = capi_get_prov_info(ctx, cert);
1315                 capi_dump_prov_info(ctx, out, pinfo);
1316                 if (pinfo)
1317                         OPENSSL_free(pinfo);
1318                 }
1319
1320         if (flags & CAPI_DMP_PEM)
1321                 PEM_write_bio_X509(out, x);
1322         X509_free(x);
1323         }
1324
1325 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1326         {
1327         HCERTSTORE hstore;
1328
1329         if (!storename)
1330                 storename = ctx->storename;
1331         if (!storename)
1332                 storename = "MY";
1333         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1334
1335         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1336                                 ctx->store_flags, storename);
1337         if (!hstore)
1338                 {
1339                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1340                 capi_addlasterror();
1341                 }
1342         return hstore;
1343         }
1344
1345 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1346         {
1347         char *storename;
1348         int idx;
1349         int ret = 1;
1350         HCERTSTORE hstore;
1351         PCCERT_CONTEXT cert = NULL;
1352
1353         storename = ctx->storename;
1354         if (!storename)
1355                 storename = "MY";
1356         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1357
1358         hstore = capi_open_store(ctx, storename);
1359         if (!hstore)
1360                 return 0;
1361         if (id)
1362                 {
1363                 cert = capi_find_cert(ctx, id, hstore);
1364                 if (!cert)
1365                         {
1366                         ret = 0;
1367                         goto err;
1368                         }
1369                 capi_dump_cert(ctx, out, cert);
1370                 CertFreeCertificateContext(cert);
1371                 }
1372         else
1373                 {
1374                 for(idx = 0;;idx++)
1375                         {
1376                         LPWSTR fname = NULL;
1377                         cert = CertEnumCertificatesInStore(hstore, cert);
1378                         if (!cert)
1379                                 break;
1380                         BIO_printf(out, "Certificate %d\n", idx);
1381                         capi_dump_cert(ctx, out, cert);
1382                         }
1383                 }
1384         err:
1385         CertCloseStore(hstore, 0);
1386         return ret;
1387         }
1388
1389 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1390         {
1391         PCCERT_CONTEXT cert = NULL;
1392         char *fname = NULL;
1393         int match;
1394         switch(ctx->lookup_method)
1395                 {
1396                 case CAPI_LU_SUBSTR:
1397                         return CertFindCertificateInStore(hstore,
1398                                         X509_ASN_ENCODING, 0,
1399                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1400                 case CAPI_LU_FNAME:
1401                         for(;;)
1402                                 {
1403                                 cert = CertEnumCertificatesInStore(hstore, cert);
1404                                 if (!cert)
1405                                         return NULL;
1406                                 fname = capi_cert_get_fname(ctx, cert);
1407                                 if (fname)
1408                                         {
1409                                         if (strcmp(fname, id))
1410                                                 match = 0;
1411                                         else
1412                                                 match = 1;
1413                                         OPENSSL_free(fname);
1414                                         if (match)
1415                                                 return cert;
1416                                         }
1417                                 }
1418                 default:
1419                         return NULL;
1420                 }
1421         }
1422
1423 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
1424         {
1425         CAPI_KEY *key;
1426         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1427         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1428                                                 contname, provname, ptype);
1429         if (!CryptAcquireContextA(&key->hprov, contname, provname, ptype, 0))
1430                 {
1431                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1432                 capi_addlasterror();
1433                 goto err;
1434                 }
1435         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1436                 {
1437                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1438                 capi_addlasterror();
1439                 CryptReleaseContext(key->hprov, 0);
1440                 goto err;
1441                 }
1442         key->keyspec = keyspec;
1443         key->pcert = NULL;
1444         return key;
1445
1446         err:
1447         OPENSSL_free(key);
1448         return NULL;
1449         }
1450
1451 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1452         {
1453         CAPI_KEY *key = NULL;
1454         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1455         char *provname = NULL, *contname = NULL;
1456         pinfo = capi_get_prov_info(ctx, cert);
1457         if (!pinfo)
1458                 goto err;
1459         provname = wide_to_asc(pinfo->pwszProvName);
1460         contname = wide_to_asc(pinfo->pwszContainerName);
1461         if (!provname || !contname)
1462                 goto err;
1463         key = capi_get_key(ctx, contname, provname,
1464                                 pinfo->dwProvType, pinfo->dwKeySpec);
1465
1466         err:
1467         if (pinfo)
1468                 OPENSSL_free(pinfo);
1469         if (provname)
1470                 OPENSSL_free(provname);
1471         if (contname)
1472                 OPENSSL_free(contname);
1473         return key;
1474         }
1475
1476 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1477         {
1478         PCCERT_CONTEXT cert;
1479         HCERTSTORE hstore;
1480         CAPI_KEY *key = NULL;
1481         switch (ctx->lookup_method)
1482                 {
1483                 case CAPI_LU_SUBSTR:
1484                 case CAPI_LU_FNAME:
1485                 hstore = capi_open_store(ctx, NULL);
1486                 if (!hstore)
1487                         return NULL;
1488                 cert = capi_find_cert(ctx, id, hstore);
1489                 if (cert)
1490                         {
1491                         key = capi_get_cert_key(ctx, cert);
1492                         CertFreeCertificateContext(cert);
1493                         }
1494                 CertCloseStore(hstore, 0);
1495                 break;
1496
1497                 case CAPI_LU_CONTNAME:
1498                 key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
1499                                                         ctx->keytype);
1500                 break;
1501                 }
1502
1503         return key;
1504         }
1505
1506 void capi_free_key(CAPI_KEY *key)
1507         {
1508         if (!key)
1509                 return;
1510         CryptDestroyKey(key->key);
1511         CryptReleaseContext(key->hprov, 0);
1512         if (key->pcert)
1513                 CertFreeCertificateContext(key->pcert);
1514         OPENSSL_free(key);
1515         }
1516
1517
1518 /* Initialize a CAPI_CTX structure */
1519
1520 static CAPI_CTX *capi_ctx_new()
1521         {
1522         CAPI_CTX *ctx;
1523         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1524         if (!ctx)
1525                 {
1526                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1527                 return NULL;
1528                 }
1529         ctx->cspname = NULL;
1530         ctx->csptype = PROV_RSA_FULL;
1531         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1532         ctx->keytype = AT_KEYEXCHANGE;
1533         ctx->storename = NULL;
1534         ctx->ssl_client_store = NULL;
1535         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1536                                 CERT_STORE_READONLY_FLAG |
1537                                 CERT_SYSTEM_STORE_CURRENT_USER;
1538         ctx->lookup_method = CAPI_LU_SUBSTR;
1539         ctx->debug_level = 0;
1540         ctx->debug_file = NULL;
1541         ctx->client_cert_select = cert_select_simple;
1542         return ctx;
1543         }
1544
1545 static void capi_ctx_free(CAPI_CTX *ctx)
1546         {
1547         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1548         if (!ctx)
1549                 return;
1550         if (ctx->cspname)
1551                 OPENSSL_free(ctx->cspname);
1552         if (ctx->debug_file)
1553                 OPENSSL_free(ctx->debug_file);
1554         if (ctx->storename)
1555                 OPENSSL_free(ctx->storename);
1556         if (ctx->ssl_client_store)
1557                 OPENSSL_free(ctx->ssl_client_store);
1558         OPENSSL_free(ctx);
1559         }
1560
1561 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1562         {
1563         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1564         if (check)
1565                 {
1566                 HCRYPTPROV hprov;
1567                 if (!CryptAcquireContextA(&hprov, NULL, pname, type,
1568                                                 CRYPT_VERIFYCONTEXT))
1569                         {
1570                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1571                         capi_addlasterror();
1572                         return 0;
1573                         }
1574                 CryptReleaseContext(hprov, 0);
1575                 }
1576         ctx->cspname = BUF_strdup(pname);
1577         ctx->csptype = type;
1578         return 1;
1579         }
1580
1581 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1582         {
1583         LPSTR pname;
1584         DWORD type;
1585         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1586                 return 0;
1587         return capi_ctx_set_provname(ctx, pname, type, 0);
1588         }
1589
1590 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1591         {
1592         int i;
1593         X509_NAME *nm;
1594         /* Special case: empty list: match anything */
1595         if (sk_X509_NAME_num(ca_dn) <= 0)
1596                 return 1;
1597         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1598                 {
1599                 nm = sk_X509_NAME_value(ca_dn, i);
1600                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1601                                 return 1;
1602                 }
1603         return 0;
1604         }
1605
1606
1607
1608 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1609         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1610         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1611         {
1612         STACK_OF(X509) *certs = NULL;
1613         X509 *x;
1614         char *storename;
1615         const char *p;
1616         int i, client_cert_idx;
1617         HCERTSTORE hstore;
1618         PCCERT_CONTEXT cert = NULL, excert = NULL;
1619         CAPI_CTX *ctx;
1620         CAPI_KEY *key;
1621         ctx = ENGINE_get_ex_data(e, capi_idx);
1622
1623         *pcert = NULL;
1624         *pkey = NULL;
1625
1626         storename = ctx->ssl_client_store;
1627         if (!storename)
1628                 storename = "MY";
1629
1630         hstore = capi_open_store(ctx, storename);
1631         if (!hstore)
1632                 return 0;
1633         /* Enumerate all certificates collect any matches */
1634         for(i = 0;;i++)
1635                 {
1636                 cert = CertEnumCertificatesInStore(hstore, cert);
1637                 if (!cert)
1638                         break;
1639                 p = cert->pbCertEncoded;
1640                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1641                 if (!x)
1642                         {
1643                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1644                         continue;
1645                         }
1646                 if (cert_issuer_match(ca_dn, x)
1647                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1648                         {
1649                         key = capi_get_cert_key(ctx, cert);
1650                         if (!key)
1651                                 {
1652                                 X509_free(x);
1653                                 continue;
1654                                 }
1655                         /* Match found: attach extra data to it so
1656                          * we can retrieve the key later.
1657                          */
1658                         excert = CertDuplicateCertificateContext(cert);
1659                         key->pcert = excert;
1660                         X509_set_ex_data(x, cert_capi_idx, key);
1661
1662                         if (!certs)
1663                                 certs = sk_X509_new_null();
1664
1665                         sk_X509_push(certs, x);
1666                         }
1667                 else
1668                         X509_free(x);
1669
1670                 }
1671
1672         if (cert)
1673                 CertFreeCertificateContext(cert);
1674         if (hstore)
1675                 CertCloseStore(hstore, 0);
1676
1677         if (!certs)
1678                 return 0;
1679
1680
1681         /* Select the appropriate certificate */
1682
1683         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1684
1685         /* Set the selected certificate and free the rest */
1686
1687         for(i = 0; i < sk_X509_num(certs); i++)
1688                 {
1689                 x = sk_X509_value(certs, i);
1690                 if (i == client_cert_idx)
1691                         *pcert = x;
1692                 else
1693                         {
1694                         key = X509_get_ex_data(x, cert_capi_idx);
1695                         capi_free_key(key);
1696                         X509_free(x);
1697                         }
1698                 }
1699
1700         sk_X509_free(certs);
1701
1702         if (!*pcert)
1703                 return 0;
1704
1705         /* Setup key for selected certificate */
1706
1707         key = X509_get_ex_data(*pcert, cert_capi_idx);
1708         *pkey = capi_get_pkey(e, key);
1709         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1710
1711         return 1;
1712
1713         }
1714
1715
1716 /* Simple client cert selection function: always select first */
1717
1718 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1719         {
1720         return 0;
1721         }
1722
1723 #ifdef OPENSSL_CAPIENG_DIALOG
1724
1725 /* More complex cert selection function, using standard function
1726  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1727  */
1728
1729 /* Definitions which are in cryptuiapi.h but this is not present in older
1730  * versions of headers.
1731  */
1732
1733 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1734 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1735 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1736 #endif
1737
1738 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1739 #define dlg_prompt L"Select a certificate to use for authentication"
1740 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1741                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1742
1743 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1744         {
1745         X509 *x;
1746         HCERTSTORE dstore;
1747         PCCERT_CONTEXT cert;
1748         CAPI_CTX *ctx;
1749         CAPI_KEY *key;
1750         HWND hwnd;
1751         int i, idx = -1;
1752         if (sk_X509_num(certs) == 1)
1753                 return 0;
1754         ctx = ENGINE_get_ex_data(e, capi_idx);
1755         /* Create an in memory store of certificates */
1756         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1757                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1758         if (!dstore)
1759                 {
1760                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1761                 capi_addlasterror();
1762                 goto err;
1763                 }
1764         /* Add all certificates to store */
1765         for(i = 0; i < sk_X509_num(certs); i++)
1766                 {
1767                 x = sk_X509_value(certs, i);
1768                 key = X509_get_ex_data(x, cert_capi_idx);
1769
1770                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1771                                                 CERT_STORE_ADD_NEW, NULL))
1772                         {
1773                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1774                         capi_addlasterror();
1775                         goto err;
1776                         }
1777
1778                 }
1779         hwnd = GetForegroundWindow();
1780         if (!hwnd)
1781                 hwnd = GetActiveWindow();
1782         if (!hwnd && ctx->getconswindow)
1783                 hwnd = ctx->getconswindow();
1784         /* Call dialog to select one */
1785         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1786                                                 dlg_columns, 0, NULL);
1787
1788         /* Find matching cert from list */
1789         if (cert)
1790                 {
1791                 for(i = 0; i < sk_X509_num(certs); i++)
1792                         {
1793                         x = sk_X509_value(certs, i);
1794                         key = X509_get_ex_data(x, cert_capi_idx);
1795                         if (CertCompareCertificate(
1796                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1797                                         cert->pCertInfo,
1798                                         key->pcert->pCertInfo))
1799                                 {
1800                                 idx = i;
1801                                 break;
1802                                 }
1803                         }
1804                 }
1805
1806         err:
1807         if (dstore)
1808                 CertCloseStore(dstore, 0);
1809         return idx;
1810
1811         }
1812 #endif
1813
1814 #else /* !__COMPILE_CAPIENG */
1815 #include <openssl/engine.h>
1816 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1817 OPENSSL_EXPORT
1818 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1819 OPENSSL_EXPORT
1820 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1821 IMPLEMENT_DYNAMIC_CHECK_FN()
1822 #else
1823 void ENGINE_load_capi(void){}
1824 #endif
1825 #endif