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
 446         if (capi_idx < 0)
 447                 {
 448                 capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 449                 if (capi_idx < 0)
 450                         goto memerr;
 451
 452                 cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 453
 454                 /* Setup RSA_METHOD */
 455                 rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 456                 ossl_rsa_meth = RSA_PKCS1_SSLeay();
 457                 capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 458                 capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 459                 capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 460                 capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 461
 462                 /* Setup DSA Method */
 463                 dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 464                 ossl_dsa_meth = DSA_OpenSSL();
 465                 capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 466                 capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 467                 capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 468                 }
 469
 470         ctx = capi_ctx_new();
 471         if (!ctx)
 472                 goto memerr;
 473
 474         ENGINE_set_ex_data(e, capi_idx, ctx);
 475
 476 #ifdef OPENSSL_CAPIENG_DIALOG
 477         {
 478         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 479         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 480         if (cryptui)
 481                 ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
 482         if (kernel)
 483                 ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
 484         if (cryptui && !OPENSSL_isservice())
 485                 ctx->client_cert_select = cert_select_dialog;
 486         }
 487 #endif
 488
 489
 490         return 1;
 491
 492         memerr:
 493         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 494         return 0;
 495
 496         return 1;
 497         }
 498
 499 static int capi_destroy(ENGINE *e)
 500         {
 501         ERR_unload_CAPI_strings();
 502         return 1;
 503         }
 504
 505 static int capi_finish(ENGINE *e)
 506         {
 507         CAPI_CTX *ctx;
 508         ctx = ENGINE_get_ex_data(e, capi_idx);
 509         capi_ctx_free(ctx);
 510         ENGINE_set_ex_data(e, capi_idx, NULL);
 511         return 1;
 512         }
 513
 514
 515 /* CryptoAPI key application data. This contains
 516  * a handle to the private key container (for sign operations)
 517  * and a handle to the key (for decrypt operations).
 518  */
 519
 520 struct CAPI_KEY_st
 521         {
 522         /* Associated certificate context (if any) */
 523         PCCERT_CONTEXT pcert;
 524         HCRYPTPROV hprov;
 525         HCRYPTKEY key;
 526         DWORD keyspec;
 527         };
 528
 529 static int bind_capi(ENGINE *e)
 530         {
 531         if (!ENGINE_set_id(e, engine_capi_id)
 532                 || !ENGINE_set_name(e, engine_capi_name)
 533                 || !ENGINE_set_init_function(e, capi_init)
 534                 || !ENGINE_set_finish_function(e, capi_finish)
 535                 || !ENGINE_set_destroy_function(e, capi_destroy)
 536                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 537                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 538                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 539                 || !ENGINE_set_load_ssl_client_cert_function(e,
 540                                                 capi_load_ssl_client_cert)
 541                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 542                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 543                         return 0;
 544         ERR_load_CAPI_strings();
 545
 546         return 1;
 547
 548         }
 549
 550 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 551 static int bind_helper(ENGINE *e, const char *id)
 552         {
 553         if(id && (strcmp(id, engine_capi_id) != 0))
 554                 return 0;
 555         if(!bind_capi(e))
 556                 return 0;
 557         return 1;
 558         }
 559 IMPLEMENT_DYNAMIC_CHECK_FN()
 560 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 561 #else
 562 static ENGINE *engine_capi(void)
 563         {
 564         ENGINE *ret = ENGINE_new();
 565         if(!ret)
 566                 return NULL;
 567         if(!bind_capi(ret))
 568                 {
 569                 ENGINE_free(ret);
 570                 return NULL;
 571                 }
 572         return ret;
 573         }
 574
 575 void ENGINE_load_capi(void)
 576         {
 577         /* Copied from eng_[openssl|dyn].c */
 578         ENGINE *toadd = engine_capi();
 579         if(!toadd) return;
 580         ENGINE_add(toadd);
 581         ENGINE_free(toadd);
 582         ERR_clear_error();
 583         }
 584 #endif
 585
 586
 587 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 588         {
 589         int i;
 590         /* Reverse buffer in place: since this is a keyblob structure
 591          * that will be freed up after conversion anyway it doesn't
 592          * matter if we change it.
 593          */
 594         for(i = 0; i < binlen / 2; i++)
 595                 {
 596                 unsigned char c;
 597                 c = bin[i];
 598                 bin[i] = bin[binlen - i - 1];
 599                 bin[binlen - i - 1] = c;
 600                 }
 601
 602         if (!BN_bin2bn(bin, binlen, bn))
 603                 return 0;
 604         return 1;
 605         }
 606
 607 /* Given a CAPI_KEY get an EVP_PKEY structure */
 608
 609 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 610         {
 611         unsigned char *pubkey = NULL;
 612         DWORD len;
 613         BLOBHEADER *bh;
 614         RSA *rkey = NULL;
 615         DSA *dkey = NULL;
 616         EVP_PKEY *ret = NULL;
 617         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 618                 {
 619                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 620                 capi_addlasterror();
 621                 return NULL;
 622                 }
 623
 624         pubkey = OPENSSL_malloc(len);
 625
 626         if (!pubkey)
 627                 goto memerr;
 628
 629         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 630                 {
 631                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 632                 capi_addlasterror();
 633                 goto err;
 634                 }
 635
 636         bh = (BLOBHEADER *)pubkey;
 637         if (bh->bType != PUBLICKEYBLOB)
 638                 {
 639                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 640                 goto err;
 641                 }
 642         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 643                 {
 644                 RSAPUBKEY *rp;
 645                 DWORD rsa_modlen;
 646                 unsigned char *rsa_modulus;
 647                 rp = (RSAPUBKEY *)(bh + 1);
 648                 if (rp->magic != 0x31415352)
 649                         {
 650                         char magstr[10];
 651                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 652                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 653                         ERR_add_error_data(2, "magic=0x", magstr);
 654                         goto err;
 655                         }
 656                 rsa_modulus = (unsigned char *)(rp + 1);
 657                 rkey = RSA_new_method(eng);
 658                 if (!rkey)
 659                         goto memerr;
 660
 661                 rkey->e = BN_new();
 662                 rkey->n = BN_new();
 663
 664                 if (!rkey->e || !rkey->n)
 665                         goto memerr;
 666
 667                 if (!BN_set_word(rkey->e, rp->pubexp))
 668                         goto memerr;
 669
 670                 rsa_modlen = rp->bitlen / 8;
 671                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 672                         goto memerr;
 673
 674                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 675
 676                 if (!(ret = EVP_PKEY_new()))
 677                         goto memerr;
 678
 679                 EVP_PKEY_assign_RSA(ret, rkey);
 680                 rkey = NULL;
 681
 682                 }
 683         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 684                 {
 685                 DSSPUBKEY *dp;
 686                 DWORD dsa_plen;
 687                 unsigned char *btmp;
 688                 dp = (DSSPUBKEY *)(bh + 1);
 689                 if (dp->magic != 0x31535344)
 690                         {
 691                         char magstr[10];
 692                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 693                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 694                         ERR_add_error_data(2, "magic=0x", magstr);
 695                         goto err;
 696                         }
 697                 dsa_plen = dp->bitlen / 8;
 698                 btmp = (unsigned char *)(dp + 1);
 699                 dkey = DSA_new_method(eng);
 700                 if (!dkey)
 701                         goto memerr;
 702                 dkey->p = BN_new();
 703                 dkey->q = BN_new();
 704                 dkey->g = BN_new();
 705                 dkey->pub_key = BN_new();
 706                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 707                         goto memerr;
 708                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 709                         goto memerr;
 710                 btmp += dsa_plen;
 711                 if (!lend_tobn(dkey->q, btmp, 20))
 712                         goto memerr;
 713                 btmp += 20;
 714                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 715                         goto memerr;
 716                 btmp += dsa_plen;
 717                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 718                         goto memerr;
 719                 btmp += dsa_plen;
 720
 721                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 722
 723                 if (!(ret = EVP_PKEY_new()))
 724                         goto memerr;
 725
 726                 EVP_PKEY_assign_DSA(ret, dkey);
 727                 dkey = NULL;
 728                 }
 729         else
 730                 {
 731                 char algstr[10];
 732                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 733                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 734                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 735                 goto err;
 736                 }
 737
 738
 739         err:
 740         if (pubkey)
 741                 OPENSSL_free(pubkey);
 742         if (!ret)
 743                 {
 744                 if (rkey)
 745                         RSA_free(rkey);
 746                 if (dkey)
 747                         DSA_free(dkey);
 748                 }
 749
 750         return ret;
 751
 752 memerr:
 753         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 754         goto err;
 755
 756         }
 757
 758 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 759         UI_METHOD *ui_method, void *callback_data)
 760         {
 761         CAPI_CTX *ctx;
 762         CAPI_KEY *key;
 763         EVP_PKEY *ret;
 764         ctx = ENGINE_get_ex_data(eng, capi_idx);
 765
 766         if (!ctx)
 767                 {
 768                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 769                 return NULL;
 770                 }
 771
 772         key = capi_find_key(ctx, key_id);
 773
 774         if (!key)
 775                 return NULL;
 776
 777         ret = capi_get_pkey(eng, key);
 778
 779         if (!ret)
 780                 capi_free_key(key);
 781         return ret;
 782
 783         }
 784
 785 /* CryptoAPI RSA operations */
 786
 787 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 788                 unsigned char *to, RSA *rsa, int padding)
 789         {
 790         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 791         return -1;
 792         }
 793
 794 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 795              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 796         {
 797         ALG_ID alg;
 798         HCRYPTHASH hash;
 799         DWORD slen;
 800         unsigned int i;
 801         int ret = -1;
 802         CAPI_KEY *capi_key;
 803         CAPI_CTX *ctx;
 804
 805         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 806
 807         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 808
 809         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 810         if (!capi_key)
 811                 {
 812                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 813                 return -1;
 814                 }
 815 /* Convert the signature type to a CryptoAPI algorithm ID */
 816         switch(dtype)
 817                 {
 818         case NID_sha1:
 819                 alg = CALG_SHA1;
 820                 break;
 821
 822         case NID_md5:
 823                 alg = CALG_MD5;
 824                 break;
 825
 826         case NID_md5_sha1:
 827                 alg = CALG_SSL3_SHAMD5;
 828                 break;
 829         default:
 830                 {
 831                 char algstr[10];
 832                 BIO_snprintf(algstr, 10, "%lx", dtype);
 833                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 834                 ERR_add_error_data(2, "NID=0x", algstr);
 835                 return -1;
 836                 }
 837         }
 838
 839
 840
 841 /* Create the hash object */
 842         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 843                 {
 844                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 845                 capi_addlasterror();
 846                 return -1;
 847                 }
 848 /* Set the hash value to the value passed */
 849
 850         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 851                 {
 852                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 853                 capi_addlasterror();
 854                 goto err;
 855                 }
 856
 857
 858 /* Finally sign it */
 859         slen = RSA_size(rsa);
 860         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 861                 {
 862                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 863                 capi_addlasterror();
 864                 goto err;
 865                 }
 866         else
 867                 {
 868                 ret = 1;
 869                 /* Inplace byte reversal of signature */
 870                 for(i = 0; i < slen / 2; i++)
 871                         {
 872                         unsigned char c;
 873                         c = sigret[i];
 874                         sigret[i] = sigret[slen - i - 1];
 875                         sigret[slen - i - 1] = c;
 876                         }
 877                 *siglen = slen;
 878                 }
 879
 880         /* Now cleanup */
 881
 882 err:
 883         CryptDestroyHash(hash);
 884
 885         return ret;
 886         }
 887
 888 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 889                 unsigned char *to, RSA *rsa, int padding)
 890         {
 891         int i;
 892         unsigned char *tmpbuf;
 893         CAPI_KEY *capi_key;
 894         CAPI_CTX *ctx;
 895         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 896
 897         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 898
 899
 900         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 901         if (!capi_key)
 902                 {
 903                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 904                 return -1;
 905                 }
 906
 907         if(padding != RSA_PKCS1_PADDING)
 908                 {
 909                 char errstr[10];
 910                 BIO_snprintf(errstr, 10, "%d", padding);
 911                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 912                 ERR_add_error_data(2, "padding=", errstr);
 913                 return -1;
 914                 }
 915
 916         /* Create temp reverse order version of input */
 917         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 918                 {
 919                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 920                 return -1;
 921                 }
 922         for(i = 0; i < flen; i++)
 923                 tmpbuf[flen - i - 1] = from[i];
 924
 925         /* Finally decrypt it */
 926         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 927                 {
 928                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 929                 capi_addlasterror();
 930                 OPENSSL_free(tmpbuf);
 931                 return -1;
 932                 }
 933         else memcpy(to, tmpbuf, flen);
 934
 935         OPENSSL_free(tmpbuf);
 936
 937         return flen;
 938         }
 939
 940 static int capi_rsa_free(RSA *rsa)
 941         {
 942         CAPI_KEY *capi_key;
 943         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 944         capi_free_key(capi_key);
 945         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 946         return 1;
 947         }
 948
 949 /* CryptoAPI DSA operations */
 950
 951 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 952                                                                 DSA *dsa)
 953         {
 954         HCRYPTHASH hash;
 955         DWORD slen;
 956         DSA_SIG *ret = NULL;
 957         CAPI_KEY *capi_key;
 958         CAPI_CTX *ctx;
 959         unsigned char csigbuf[40];
 960
 961         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 962
 963         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 964
 965         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 966
 967         if (!capi_key)
 968                 {
 969                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 970                 return NULL;
 971                 }
 972
 973         if (dlen != 20)
 974                 {
 975                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 976                 return NULL;
 977                 }
 978
 979         /* Create the hash object */
 980         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
 981                 {
 982                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 983                 capi_addlasterror();
 984                 return NULL;
 985                 }
 986
 987         /* Set the hash value to the value passed */
 988         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
 989                 {
 990                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 991                 capi_addlasterror();
 992                 goto err;
 993                 }
 994
 995
 996         /* Finally sign it */
 997         slen = sizeof(csigbuf);
 998         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
 999                 {
1000                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
1001                 capi_addlasterror();
1002                 goto err;
1003                 }
1004         else
1005                 {
1006                 ret = DSA_SIG_new();
1007                 if (!ret)
1008                         goto err;
1009                 ret->r = BN_new();
1010                 ret->s = BN_new();
1011                 if (!ret->r || !ret->s)
1012                         goto err;
1013                 if (!lend_tobn(ret->r, csigbuf, 20)
1014                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1015                         {
1016                         DSA_SIG_free(ret);
1017                         ret = NULL;
1018                         goto err;
1019                         }
1020                 }
1021
1022         /* Now cleanup */
1023
1024 err:
1025         OPENSSL_cleanse(csigbuf, 40);
1026         CryptDestroyHash(hash);
1027         return ret;
1028         }
1029
1030 static int capi_dsa_free(DSA *dsa)
1031         {
1032         CAPI_KEY *capi_key;
1033         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1034         capi_free_key(capi_key);
1035         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1036         return 1;
1037         }
1038
1039 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1040         {
1041         BIO *out;
1042
1043         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1044                 return;
1045         out = BIO_new_file(ctx->debug_file, "a+");
1046         BIO_vprintf(out, format, argptr);
1047         BIO_free(out);
1048         }
1049
1050 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1051         {
1052         va_list args;
1053         va_start(args, format);
1054         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1055         va_end(args);
1056         }
1057
1058 static void capi_addlasterror(void)
1059         {
1060         capi_adderror(GetLastError());
1061         }
1062
1063 static void capi_adderror(DWORD err)
1064         {
1065         char errstr[10];
1066         BIO_snprintf(errstr, 10, "%lX", err);
1067         ERR_add_error_data(2, "Error code= 0x", errstr);
1068         }
1069
1070 static char *wide_to_asc(LPWSTR wstr)
1071         {
1072         char *str;
1073         int len_0,sz;
1074
1075         if (!wstr)
1076                 return NULL;
1077         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1078         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1079         if (!sz)
1080                 {
1081                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1082                 return NULL;
1083                 }
1084         str = OPENSSL_malloc(sz);
1085         if (!str)
1086                 {
1087                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1088                 return NULL;
1089                 }
1090         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1091                 {
1092                 OPENSSL_free(str);
1093                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1094                 return NULL;
1095                 }
1096         return str;
1097         }
1098
1099 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1100         {
1101         LPSTR name;
1102         DWORD len, err;
1103         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1104         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
1105                 {
1106                 err = GetLastError();
1107                 if (err == ERROR_NO_MORE_ITEMS)
1108                         return 2;
1109                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1110                 capi_adderror(err);
1111                 return 0;
1112                 }
1113         name = OPENSSL_malloc(len);
1114         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
1115                 {
1116                 err = GetLastError();
1117                 if (err == ERROR_NO_MORE_ITEMS)
1118                         return 2;
1119                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1120                 capi_adderror(err);
1121                 return 0;
1122                 }
1123         *pname = name;
1124         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
1125
1126         return 1;
1127         }
1128
1129 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1130         {
1131         DWORD idx, ptype;
1132         int ret;
1133         LPSTR provname = NULL;
1134         CAPI_trace(ctx, "capi_list_providers\n");
1135         BIO_printf(out, "Available CSPs:\n");
1136         for(idx = 0; ; idx++)
1137                 {
1138                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1139                 if (ret == 2)
1140                         break;
1141                 if (ret == 0)
1142                         break;
1143                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1144                 OPENSSL_free(provname);
1145                 }
1146         return 1;
1147         }
1148
1149 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1150         {
1151         int ret = 1;
1152         HCRYPTPROV hprov;
1153         DWORD err, idx, flags, buflen = 0, clen;
1154         LPSTR cname;
1155         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1156         if (!CryptAcquireContextA(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1157                 {
1158                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1159                 capi_addlasterror();
1160                 return 0;
1161                 }
1162         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1163                 {
1164                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1165                 capi_addlasterror();
1166                 CryptReleaseContext(hprov, 0);
1167                 return 0;
1168                 }
1169         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1170         if (buflen == 0)
1171                 buflen = 1024;
1172         cname = OPENSSL_malloc(buflen);
1173         if (!cname)
1174                 {
1175                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1176                 goto err;
1177                 }
1178
1179         for (idx = 0;;idx++)
1180                 {
1181                 clen = buflen;
1182                 cname[0] = 0;
1183
1184                 if (idx == 0)
1185                         flags = CRYPT_FIRST;
1186                 else
1187                         flags = 0;
1188                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
1189                         {
1190                         err = GetLastError();
1191                         if (err == ERROR_NO_MORE_ITEMS)
1192                                 goto done;
1193                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1194                         capi_adderror(err);
1195                         goto err;
1196                         }
1197                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1198                 if (!cname[0] && (clen == buflen))
1199                         {
1200                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1201                         goto done;
1202                         }
1203                 BIO_printf(out, "%d. %s\n", idx, cname);
1204                 }
1205         err:
1206
1207         ret = 0;
1208
1209         done:
1210         if (cname)
1211                 OPENSSL_free(cname);
1212         CryptReleaseContext(hprov, 0);
1213
1214         return ret;
1215         }
1216
1217 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1218         {
1219         DWORD len;
1220         CRYPT_KEY_PROV_INFO *pinfo;
1221
1222         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1223                 return NULL;
1224         pinfo = OPENSSL_malloc(len);
1225         if (!pinfo)
1226                 {
1227                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1228                 return NULL;
1229                 }
1230         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1231                 {
1232                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1233                 capi_addlasterror();
1234                 OPENSSL_free(pinfo);
1235                 return NULL;
1236                 }
1237         return pinfo;
1238         }
1239
1240 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1241         {
1242         char *provname = NULL, *contname = NULL;
1243         if (!pinfo)
1244                 {
1245                 BIO_printf(out, "  No Private Key\n");
1246                 return;
1247                 }
1248         provname = wide_to_asc(pinfo->pwszProvName);
1249         contname = wide_to_asc(pinfo->pwszContainerName);
1250         if (!provname || !contname)
1251                 goto err;
1252
1253         BIO_printf(out, "  Private Key Info:\n");
1254         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1255         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1256         err:
1257         if (provname)
1258                 OPENSSL_free(provname);
1259         if (contname)
1260                 OPENSSL_free(contname);
1261         }
1262
1263 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1264         {
1265         LPWSTR wfname;
1266         DWORD dlen;
1267
1268         CAPI_trace(ctx, "capi_cert_get_fname\n");
1269         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1270                 return NULL;
1271         wfname = OPENSSL_malloc(dlen);
1272         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1273                 {
1274                 char *fname = wide_to_asc(wfname);
1275                 OPENSSL_free(wfname);
1276                 return fname;
1277                 }
1278         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1279         capi_addlasterror();
1280
1281         OPENSSL_free(wfname);
1282         return NULL;
1283         }
1284
1285
1286 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1287         {
1288         X509 *x;
1289         unsigned char *p;
1290         unsigned long flags = ctx->dump_flags;
1291         if (flags & CAPI_DMP_FNAME)
1292                 {
1293                 char *fname;
1294                 fname = capi_cert_get_fname(ctx, cert);
1295                 if (fname)
1296                         {
1297                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1298                         OPENSSL_free(fname);
1299                         }
1300                 else
1301                         BIO_printf(out, "  <No Friendly Name>\n");
1302                 }
1303
1304         p = cert->pbCertEncoded;
1305         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1306         if (!x)
1307                 BIO_printf(out, "  <Can't parse certificate>\n");
1308         if (flags & CAPI_DMP_SUMMARY)
1309                 {
1310                 BIO_printf(out, "  Subject: ");
1311                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1312                 BIO_printf(out, "\n  Issuer: ");
1313                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1314                 BIO_printf(out, "\n");
1315                 }
1316         if (flags & CAPI_DMP_FULL)
1317                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1318
1319         if (flags & CAPI_DMP_PKEYINFO)
1320                 {
1321                 CRYPT_KEY_PROV_INFO *pinfo;
1322                 pinfo = capi_get_prov_info(ctx, cert);
1323                 capi_dump_prov_info(ctx, out, pinfo);
1324                 if (pinfo)
1325                         OPENSSL_free(pinfo);
1326                 }
1327
1328         if (flags & CAPI_DMP_PEM)
1329                 PEM_write_bio_X509(out, x);
1330         X509_free(x);
1331         }
1332
1333 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1334         {
1335         HCERTSTORE hstore;
1336
1337         if (!storename)
1338                 storename = ctx->storename;
1339         if (!storename)
1340                 storename = "MY";
1341         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1342
1343         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1344                                 ctx->store_flags, storename);
1345         if (!hstore)
1346                 {
1347                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1348                 capi_addlasterror();
1349                 }
1350         return hstore;
1351         }
1352
1353 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1354         {
1355         char *storename;
1356         int idx;
1357         int ret = 1;
1358         HCERTSTORE hstore;
1359         PCCERT_CONTEXT cert = NULL;
1360
1361         storename = ctx->storename;
1362         if (!storename)
1363                 storename = "MY";
1364         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1365
1366         hstore = capi_open_store(ctx, storename);
1367         if (!hstore)
1368                 return 0;
1369         if (id)
1370                 {
1371                 cert = capi_find_cert(ctx, id, hstore);
1372                 if (!cert)
1373                         {
1374                         ret = 0;
1375                         goto err;
1376                         }
1377                 capi_dump_cert(ctx, out, cert);
1378                 CertFreeCertificateContext(cert);
1379                 }
1380         else
1381                 {
1382                 for(idx = 0;;idx++)
1383                         {
1384                         LPWSTR fname = NULL;
1385                         cert = CertEnumCertificatesInStore(hstore, cert);
1386                         if (!cert)
1387                                 break;
1388                         BIO_printf(out, "Certificate %d\n", idx);
1389                         capi_dump_cert(ctx, out, cert);
1390                         }
1391                 }
1392         err:
1393         CertCloseStore(hstore, 0);
1394         return ret;
1395         }
1396
1397 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1398         {
1399         PCCERT_CONTEXT cert = NULL;
1400         char *fname = NULL;
1401         int match;
1402         switch(ctx->lookup_method)
1403                 {
1404                 case CAPI_LU_SUBSTR:
1405                         return CertFindCertificateInStore(hstore,
1406                                         X509_ASN_ENCODING, 0,
1407                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1408                 case CAPI_LU_FNAME:
1409                         for(;;)
1410                                 {
1411                                 cert = CertEnumCertificatesInStore(hstore, cert);
1412                                 if (!cert)
1413                                         return NULL;
1414                                 fname = capi_cert_get_fname(ctx, cert);
1415                                 if (fname)
1416                                         {
1417                                         if (strcmp(fname, id))
1418                                                 match = 0;
1419                                         else
1420                                                 match = 1;
1421                                         OPENSSL_free(fname);
1422                                         if (match)
1423                                                 return cert;
1424                                         }
1425                                 }
1426                 default:
1427                         return NULL;
1428                 }
1429         }
1430
1431 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
1432         {
1433         CAPI_KEY *key;
1434     DWORD dwFlags = 0;
1435         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1436         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1437                                                 contname, provname, ptype);
1438     if(ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
1439         dwFlags = CRYPT_MACHINE_KEYSET;
1440     if (!CryptAcquireContextA(&key->hprov, contname, provname, ptype, dwFlags))
1441                 {
1442                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1443                 capi_addlasterror();
1444                 goto err;
1445                 }
1446         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1447                 {
1448                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1449                 capi_addlasterror();
1450                 CryptReleaseContext(key->hprov, 0);
1451                 goto err;
1452                 }
1453         key->keyspec = keyspec;
1454         key->pcert = NULL;
1455         return key;
1456
1457         err:
1458         OPENSSL_free(key);
1459         return NULL;
1460         }
1461
1462 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1463         {
1464         CAPI_KEY *key = NULL;
1465         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1466         char *provname = NULL, *contname = NULL;
1467         pinfo = capi_get_prov_info(ctx, cert);
1468         if (!pinfo)
1469                 goto err;
1470         provname = wide_to_asc(pinfo->pwszProvName);
1471         contname = wide_to_asc(pinfo->pwszContainerName);
1472         if (!provname || !contname)
1473                 goto err;
1474         key = capi_get_key(ctx, contname, provname,
1475                                 pinfo->dwProvType, pinfo->dwKeySpec);
1476
1477         err:
1478         if (pinfo)
1479                 OPENSSL_free(pinfo);
1480         if (provname)
1481                 OPENSSL_free(provname);
1482         if (contname)
1483                 OPENSSL_free(contname);
1484         return key;
1485         }
1486
1487 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1488         {
1489         PCCERT_CONTEXT cert;
1490         HCERTSTORE hstore;
1491         CAPI_KEY *key = NULL;
1492         switch (ctx->lookup_method)
1493                 {
1494                 case CAPI_LU_SUBSTR:
1495                 case CAPI_LU_FNAME:
1496                 hstore = capi_open_store(ctx, NULL);
1497                 if (!hstore)
1498                         return NULL;
1499                 cert = capi_find_cert(ctx, id, hstore);
1500                 if (cert)
1501                         {
1502                         key = capi_get_cert_key(ctx, cert);
1503                         CertFreeCertificateContext(cert);
1504                         }
1505                 CertCloseStore(hstore, 0);
1506                 break;
1507
1508                 case CAPI_LU_CONTNAME:
1509                 key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
1510                                                         ctx->keytype);
1511                 break;
1512                 }
1513
1514         return key;
1515         }
1516
1517 void capi_free_key(CAPI_KEY *key)
1518         {
1519         if (!key)
1520                 return;
1521         CryptDestroyKey(key->key);
1522         CryptReleaseContext(key->hprov, 0);
1523         if (key->pcert)
1524                 CertFreeCertificateContext(key->pcert);
1525         OPENSSL_free(key);
1526         }
1527
1528
1529 /* Initialize a CAPI_CTX structure */
1530
1531 static CAPI_CTX *capi_ctx_new()
1532         {
1533         CAPI_CTX *ctx;
1534         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1535         if (!ctx)
1536                 {
1537                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1538                 return NULL;
1539                 }
1540         ctx->cspname = NULL;
1541         ctx->csptype = PROV_RSA_FULL;
1542         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1543         ctx->keytype = AT_KEYEXCHANGE;
1544         ctx->storename = NULL;
1545         ctx->ssl_client_store = NULL;
1546         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1547                                 CERT_STORE_READONLY_FLAG |
1548                                 CERT_SYSTEM_STORE_CURRENT_USER;
1549         ctx->lookup_method = CAPI_LU_SUBSTR;
1550         ctx->debug_level = 0;
1551         ctx->debug_file = NULL;
1552         ctx->client_cert_select = cert_select_simple;
1553         return ctx;
1554         }
1555
1556 static void capi_ctx_free(CAPI_CTX *ctx)
1557         {
1558         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1559         if (!ctx)
1560                 return;
1561         if (ctx->cspname)
1562                 OPENSSL_free(ctx->cspname);
1563         if (ctx->debug_file)
1564                 OPENSSL_free(ctx->debug_file);
1565         if (ctx->storename)
1566                 OPENSSL_free(ctx->storename);
1567         if (ctx->ssl_client_store)
1568                 OPENSSL_free(ctx->ssl_client_store);
1569         OPENSSL_free(ctx);
1570         }
1571
1572 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1573         {
1574         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1575         if (check)
1576                 {
1577                 HCRYPTPROV hprov;
1578                 if (!CryptAcquireContextA(&hprov, NULL, pname, type,
1579                                                 CRYPT_VERIFYCONTEXT))
1580                         {
1581                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1582                         capi_addlasterror();
1583                         return 0;
1584                         }
1585                 CryptReleaseContext(hprov, 0);
1586                 }
1587         if (ctx->cspname)
1588                 OPENSSL_free(ctx->cspname);
1589         ctx->cspname = BUF_strdup(pname);
1590         ctx->csptype = type;
1591         return 1;
1592         }
1593
1594 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1595         {
1596         LPSTR pname;
1597         DWORD type;
1598         int res;
1599         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1600                 return 0;
1601         res = capi_ctx_set_provname(ctx, pname, type, 0);
1602         OPENSSL_free(pname);
1603         return res;
1604         }
1605
1606 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1607         {
1608         int i;
1609         X509_NAME *nm;
1610         /* Special case: empty list: match anything */
1611         if (sk_X509_NAME_num(ca_dn) <= 0)
1612                 return 1;
1613         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1614                 {
1615                 nm = sk_X509_NAME_value(ca_dn, i);
1616                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1617                                 return 1;
1618                 }
1619         return 0;
1620         }
1621
1622
1623
1624 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1625         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1626         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1627         {
1628         STACK_OF(X509) *certs = NULL;
1629         X509 *x;
1630         char *storename;
1631         const char *p;
1632         int i, client_cert_idx;
1633         HCERTSTORE hstore;
1634         PCCERT_CONTEXT cert = NULL, excert = NULL;
1635         CAPI_CTX *ctx;
1636         CAPI_KEY *key;
1637         ctx = ENGINE_get_ex_data(e, capi_idx);
1638
1639         *pcert = NULL;
1640         *pkey = NULL;
1641
1642         storename = ctx->ssl_client_store;
1643         if (!storename)
1644                 storename = "MY";
1645
1646         hstore = capi_open_store(ctx, storename);
1647         if (!hstore)
1648                 return 0;
1649         /* Enumerate all certificates collect any matches */
1650         for(i = 0;;i++)
1651                 {
1652                 cert = CertEnumCertificatesInStore(hstore, cert);
1653                 if (!cert)
1654                         break;
1655                 p = cert->pbCertEncoded;
1656                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1657                 if (!x)
1658                         {
1659                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1660                         continue;
1661                         }
1662                 if (cert_issuer_match(ca_dn, x)
1663                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1664                         {
1665                         key = capi_get_cert_key(ctx, cert);
1666                         if (!key)
1667                                 {
1668                                 X509_free(x);
1669                                 continue;
1670                                 }
1671                         /* Match found: attach extra data to it so
1672                          * we can retrieve the key later.
1673                          */
1674                         excert = CertDuplicateCertificateContext(cert);
1675                         key->pcert = excert;
1676                         X509_set_ex_data(x, cert_capi_idx, key);
1677
1678                         if (!certs)
1679                                 certs = sk_X509_new_null();
1680
1681                         sk_X509_push(certs, x);
1682                         }
1683                 else
1684                         X509_free(x);
1685
1686                 }
1687
1688         if (cert)
1689                 CertFreeCertificateContext(cert);
1690         if (hstore)
1691                 CertCloseStore(hstore, 0);
1692
1693         if (!certs)
1694                 return 0;
1695
1696
1697         /* Select the appropriate certificate */
1698
1699         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1700
1701         /* Set the selected certificate and free the rest */
1702
1703         for(i = 0; i < sk_X509_num(certs); i++)
1704                 {
1705                 x = sk_X509_value(certs, i);
1706                 if (i == client_cert_idx)
1707                         *pcert = x;
1708                 else
1709                         {
1710                         key = X509_get_ex_data(x, cert_capi_idx);
1711                         capi_free_key(key);
1712                         X509_free(x);
1713                         }
1714                 }
1715
1716         sk_X509_free(certs);
1717
1718         if (!*pcert)
1719                 return 0;
1720
1721         /* Setup key for selected certificate */
1722
1723         key = X509_get_ex_data(*pcert, cert_capi_idx);
1724         *pkey = capi_get_pkey(e, key);
1725         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1726
1727         return 1;
1728
1729         }
1730
1731
1732 /* Simple client cert selection function: always select first */
1733
1734 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1735         {
1736         return 0;
1737         }
1738
1739 #ifdef OPENSSL_CAPIENG_DIALOG
1740
1741 /* More complex cert selection function, using standard function
1742  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1743  */
1744
1745 /* Definitions which are in cryptuiapi.h but this is not present in older
1746  * versions of headers.
1747  */
1748
1749 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1750 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1751 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1752 #endif
1753
1754 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1755 #define dlg_prompt L"Select a certificate to use for authentication"
1756 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1757                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1758
1759 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1760         {
1761         X509 *x;
1762         HCERTSTORE dstore;
1763         PCCERT_CONTEXT cert;
1764         CAPI_CTX *ctx;
1765         CAPI_KEY *key;
1766         HWND hwnd;
1767         int i, idx = -1;
1768         if (sk_X509_num(certs) == 1)
1769                 return 0;
1770         ctx = ENGINE_get_ex_data(e, capi_idx);
1771         /* Create an in memory store of certificates */
1772         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1773                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1774         if (!dstore)
1775                 {
1776                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1777                 capi_addlasterror();
1778                 goto err;
1779                 }
1780         /* Add all certificates to store */
1781         for(i = 0; i < sk_X509_num(certs); i++)
1782                 {
1783                 x = sk_X509_value(certs, i);
1784                 key = X509_get_ex_data(x, cert_capi_idx);
1785
1786                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1787                                                 CERT_STORE_ADD_NEW, NULL))
1788                         {
1789                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1790                         capi_addlasterror();
1791                         goto err;
1792                         }
1793
1794                 }
1795         hwnd = GetForegroundWindow();
1796         if (!hwnd)
1797                 hwnd = GetActiveWindow();
1798         if (!hwnd && ctx->getconswindow)
1799                 hwnd = ctx->getconswindow();
1800         /* Call dialog to select one */
1801         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1802                                                 dlg_columns, 0, NULL);
1803
1804         /* Find matching cert from list */
1805         if (cert)
1806                 {
1807                 for(i = 0; i < sk_X509_num(certs); i++)
1808                         {
1809                         x = sk_X509_value(certs, i);
1810                         key = X509_get_ex_data(x, cert_capi_idx);
1811                         if (CertCompareCertificate(
1812                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1813                                         cert->pCertInfo,
1814                                         key->pcert->pCertInfo))
1815                                 {
1816                                 idx = i;
1817                                 break;
1818                                 }
1819                         }
1820                 }
1821
1822         err:
1823         if (dstore)
1824                 CertCloseStore(dstore, 0);
1825         return idx;
1826
1827         }
1828 #endif
1829
1830 #else /* !__COMPILE_CAPIENG */
1831 #include <openssl/engine.h>
1832 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1833 OPENSSL_EXPORT
1834 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1835 OPENSSL_EXPORT
1836 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1837 IMPLEMENT_DYNAMIC_CHECK_FN()
1838 #else
1839 void ENGINE_load_capi(void){}
1840 #endif
1841 #endif