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 <stdlib.h>
  58
  59 #include <openssl/crypto.h>
  60
  61 #ifdef OPENSSL_SYS_WIN32
  62 #ifndef OPENSSL_NO_CAPIENG
  63
  64 #include <openssl/buffer.h>
  65 #include <openssl/bn.h>
  66 #include <openssl/rsa.h>
  67 #include <openssl/dsa.h>
  68
  69 #ifndef _WIN32_WINNT
  70 #define _WIN32_WINNT 0x0400
  71 #endif
  72
  73 #include <windows.h>
  74 #include <wincrypt.h>
  75 #include <malloc.h>
  76 #ifndef alloca
  77 # define alloca _alloca
  78 #endif
  79
  80 /*
  81  * This module uses several "new" interfaces, among which is
  82  * CertGetCertificateContextProperty. CERT_KEY_PROV_INFO_PROP_ID is
  83  * one of possible values you can pass to function in question. By
  84  * checking if it's defined we can see if wincrypt.h and accompanying
  85  * crypt32.lib are in shape. The native MingW32 headers up to and
  86  * including __W32API_VERSION 3.14 lack of struct DSSPUBKEY and the
  87  * defines CERT_STORE_PROV_SYSTEM_A and CERT_STORE_READONLY_FLAG,
  88  * so we check for these too and avoid compiling.
  89  * Yes, it's rather "weak" test and if compilation fails,
  90  * then re-configure with -DOPENSSL_NO_CAPIENG.
  91  */
  92 #if defined(CERT_KEY_PROV_INFO_PROP_ID) && \
  93     defined(CERT_STORE_PROV_SYSTEM_A) && \
  94     defined(CERT_STORE_READONLY_FLAG)
  95 # define __COMPILE_CAPIENG
  96 #endif /* CERT_KEY_PROV_INFO_PROP_ID */
  97 #endif /* OPENSSL_NO_CAPIENG */
  98 #endif /* OPENSSL_SYS_WIN32 */
  99
 100 #ifdef __COMPILE_CAPIENG
 101
 102 #undef X509_EXTENSIONS
 103 #undef X509_CERT_PAIR
 104
 105 /* Definitions which may be missing from earlier version of headers */
 106 #ifndef CERT_STORE_OPEN_EXISTING_FLAG
 107 #define CERT_STORE_OPEN_EXISTING_FLAG                   0x00004000
 108 #endif
 109
 110 #ifndef CERT_STORE_CREATE_NEW_FLAG
 111 #define CERT_STORE_CREATE_NEW_FLAG                      0x00002000
 112 #endif
 113
 114 #ifndef CERT_SYSTEM_STORE_CURRENT_USER
 115 #define CERT_SYSTEM_STORE_CURRENT_USER                  0x00010000
 116 #endif
 117
 118 #ifndef ALG_SID_SHA_256
 119         #define ALG_SID_SHA_256                 12
 120 #endif
 121 #ifndef ALG_SID_SHA_384
 122         #define ALG_SID_SHA_384                 13
 123 #endif
 124 #ifndef ALG_SID_SHA_512
 125         #define ALG_SID_SHA_512                 14
 126 #endif
 127
 128 #ifndef CALG_SHA_256
 129         #define CALG_SHA_256            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_256)
 130 #endif
 131 #ifndef CALG_SHA_384
 132         #define CALG_SHA_384            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_384)
 133 #endif
 134 #ifndef CALG_SHA_512
 135         #define CALG_SHA_512            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_512)
 136 #endif
 137
 138 #include <openssl/engine.h>
 139 #include <openssl/pem.h>
 140 #include <openssl/x509v3.h>
 141
 142 #include "e_capi_err.h"
 143 #include "e_capi_err.c"
 144
 145
 146 static const char *engine_capi_id = "capi";
 147 static const char *engine_capi_name = "CryptoAPI ENGINE";
 148
 149 typedef struct CAPI_CTX_st CAPI_CTX;
 150 typedef struct CAPI_KEY_st CAPI_KEY;
 151
 152 static void capi_addlasterror(void);
 153 static void capi_adderror(DWORD err);
 154
 155 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...);
 156
 157 static int capi_list_providers(CAPI_CTX *ctx, BIO *out);
 158 static int capi_list_containers(CAPI_CTX *ctx, BIO *out);
 159 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *storename);
 160 void capi_free_key(CAPI_KEY *key);
 161
 162 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore);
 163
 164 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id);
 165
 166 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 167         UI_METHOD *ui_method, void *callback_data);
 168 static int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 169              unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
 170 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
 171                 unsigned char *to, RSA *rsa, int padding);
 172 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
 173                 unsigned char *to, RSA *rsa, int padding);
 174 static int capi_rsa_free(RSA *rsa);
 175
 176 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 177                                                         DSA *dsa);
 178 static int capi_dsa_free(DSA *dsa);
 179
 180 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
 181         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
 182         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
 183
 184 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 185 #ifdef OPENSSL_CAPIENG_DIALOG
 186 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 187 #endif
 188
 189 typedef PCCERT_CONTEXT (WINAPI *CERTDLG)(HCERTSTORE, HWND, LPCWSTR,
 190                                                 LPCWSTR, DWORD, DWORD,
 191                                                 void *);
 192 typedef HWND (WINAPI *GETCONSWIN)(void);
 193
 194 /* This structure contains CAPI ENGINE specific data:
 195  * it contains various global options and affects how
 196  * other functions behave.
 197  */
 198
 199 #define CAPI_DBG_TRACE  2
 200 #define CAPI_DBG_ERROR  1
 201
 202 struct CAPI_CTX_st {
 203         int debug_level;
 204         char *debug_file;
 205         /* Parameters to use for container lookup */
 206         DWORD keytype;
 207         LPSTR cspname;
 208         DWORD csptype;
 209         /* Certificate store name to use */
 210         LPSTR storename;
 211         LPSTR ssl_client_store;
 212         /* System store flags */
 213         DWORD store_flags;
 214
 215 /* Lookup string meanings in load_private_key */
 216 /* Substring of subject: uses "storename" */
 217 #define CAPI_LU_SUBSTR          1
 218 /* Friendly name: uses storename */
 219 #define CAPI_LU_FNAME           2
 220 /* Container name: uses cspname, keytype */
 221 #define CAPI_LU_CONTNAME        3
 222         int lookup_method;
 223 /* Info to dump with dumpcerts option */
 224 /* Issuer and serial name strings */
 225 #define CAPI_DMP_SUMMARY        0x1
 226 /* Friendly name */
 227 #define CAPI_DMP_FNAME          0x2
 228 /* Full X509_print dump */
 229 #define CAPI_DMP_FULL           0x4
 230 /* Dump PEM format certificate */
 231 #define CAPI_DMP_PEM            0x8
 232 /* Dump pseudo key (if possible) */
 233 #define CAPI_DMP_PSKEY          0x10
 234 /* Dump key info (if possible) */
 235 #define CAPI_DMP_PKEYINFO       0x20
 236
 237         DWORD dump_flags;
 238         int (*client_cert_select)(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 239
 240         CERTDLG certselectdlg;
 241         GETCONSWIN getconswindow;
 242 };
 243
 244
 245 static CAPI_CTX *capi_ctx_new();
 246 static void capi_ctx_free(CAPI_CTX *ctx);
 247 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
 248 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
 249
 250 #define CAPI_CMD_LIST_CERTS             ENGINE_CMD_BASE
 251 #define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
 252 #define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
 253 #define CAPI_CMD_DEBUG_FILE             (ENGINE_CMD_BASE + 3)
 254 #define CAPI_CMD_KEYTYPE                (ENGINE_CMD_BASE + 4)
 255 #define CAPI_CMD_LIST_CSPS              (ENGINE_CMD_BASE + 5)
 256 #define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
 257 #define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
 258 #define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
 259 #define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
 260 #define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
 261 #define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
 262 #define CAPI_CMD_STORE_NAME             (ENGINE_CMD_BASE + 12)
 263 #define CAPI_CMD_STORE_FLAGS            (ENGINE_CMD_BASE + 13)
 264
 265 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
 266         {CAPI_CMD_LIST_CERTS,
 267                 "list_certs",
 268                 "List all certificates in store",
 269                 ENGINE_CMD_FLAG_NO_INPUT},
 270         {CAPI_CMD_LOOKUP_CERT,
 271                 "lookup_cert",
 272                 "Lookup and output certificates",
 273                 ENGINE_CMD_FLAG_STRING},
 274         {CAPI_CMD_DEBUG_LEVEL,
 275                 "debug_level",
 276                 "debug level (1=errors, 2=trace)",
 277                 ENGINE_CMD_FLAG_NUMERIC},
 278         {CAPI_CMD_DEBUG_FILE,
 279                 "debug_file",
 280                 "debugging filename)",
 281                 ENGINE_CMD_FLAG_STRING},
 282         {CAPI_CMD_KEYTYPE,
 283                 "key_type",
 284                 "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
 285                 ENGINE_CMD_FLAG_NUMERIC},
 286         {CAPI_CMD_LIST_CSPS,
 287                 "list_csps",
 288                 "List all CSPs",
 289                 ENGINE_CMD_FLAG_NO_INPUT},
 290         {CAPI_CMD_SET_CSP_IDX,
 291                 "csp_idx",
 292                 "Set CSP by index",
 293                 ENGINE_CMD_FLAG_NUMERIC},
 294         {CAPI_CMD_SET_CSP_NAME,
 295                 "csp_name",
 296                 "Set CSP name, (default CSP used if not specified)",
 297                 ENGINE_CMD_FLAG_STRING},
 298         {CAPI_CMD_SET_CSP_TYPE,
 299                 "csp_type",
 300                 "Set CSP type, (default RSA_PROV_FULL)",
 301                 ENGINE_CMD_FLAG_NUMERIC},
 302         {CAPI_CMD_LIST_CONTAINERS,
 303                 "list_containers",
 304                 "list container names",
 305                 ENGINE_CMD_FLAG_NO_INPUT},
 306         {CAPI_CMD_LIST_OPTIONS,
 307                 "list_options",
 308                 "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
 309                 "32=private key info)",
 310                 ENGINE_CMD_FLAG_NUMERIC},
 311         {CAPI_CMD_LOOKUP_METHOD,
 312                 "lookup_method",
 313                 "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
 314                 ENGINE_CMD_FLAG_NUMERIC},
 315         {CAPI_CMD_STORE_NAME,
 316                 "store_name",
 317                 "certificate store name, default \"MY\"",
 318                 ENGINE_CMD_FLAG_STRING},
 319         {CAPI_CMD_STORE_FLAGS,
 320                 "store_flags",
 321                 "Certificate store flags: 1 = system store",
 322                 ENGINE_CMD_FLAG_NUMERIC},
 323
 324         {0, NULL, NULL, 0}
 325         };
 326
 327 static int capi_idx = -1;
 328 static int rsa_capi_idx = -1;
 329 static int dsa_capi_idx = -1;
 330 static int cert_capi_idx = -1;
 331
 332 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 333         {
 334         int ret = 1;
 335         CAPI_CTX *ctx;
 336         BIO *out;
 337         if (capi_idx == -1)
 338                 {
 339                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
 340                 return 0;
 341                 }
 342         ctx = ENGINE_get_ex_data(e, capi_idx);
 343         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 344         if (out == NULL)
 345                 {
 346                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_FILE_OPEN_ERROR);
 347                 return 0;
 348                 }
 349         switch (cmd)
 350                 {
 351                 case CAPI_CMD_LIST_CSPS:
 352                 ret = capi_list_providers(ctx, out);
 353                 break;
 354
 355                 case CAPI_CMD_LIST_CERTS:
 356                 ret = capi_list_certs(ctx, out, NULL);
 357                 break;
 358
 359                 case CAPI_CMD_LOOKUP_CERT:
 360                 ret = capi_list_certs(ctx, out, p);
 361                 break;
 362
 363                 case CAPI_CMD_LIST_CONTAINERS:
 364                 ret = capi_list_containers(ctx, out);
 365                 break;
 366
 367                 case CAPI_CMD_STORE_NAME:
 368                 if (ctx->storename)
 369                         OPENSSL_free(ctx->storename);
 370                 ctx->storename = BUF_strdup(p);
 371                 CAPI_trace(ctx, "Setting store name to %s\n", p);
 372                 break;
 373
 374                 case CAPI_CMD_STORE_FLAGS:
 375                 if (i & 1)
 376                         {
 377                         ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
 378                         ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
 379                         }
 380                 else
 381                         {
 382                         ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
 383                         ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
 384                         }
 385                 CAPI_trace(ctx, "Setting flags to %d\n", i);
 386                 break;
 387
 388                 case CAPI_CMD_DEBUG_LEVEL:
 389                 ctx->debug_level = (int)i;
 390                 CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
 391                 break;
 392
 393                 case CAPI_CMD_DEBUG_FILE:
 394                 ctx->debug_file = BUF_strdup(p);
 395                 CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
 396                 break;
 397
 398                 case CAPI_CMD_KEYTYPE:
 399                 ctx->keytype = i;
 400                 CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
 401                 break;
 402
 403                 case CAPI_CMD_SET_CSP_IDX:
 404                 ret = capi_ctx_set_provname_idx(ctx, i);
 405                 break;
 406
 407                 case CAPI_CMD_LIST_OPTIONS:
 408                 ctx->dump_flags = i;
 409                 break;
 410
 411                 case CAPI_CMD_LOOKUP_METHOD:
 412                 if (i < 1 || i > 3)
 413                         {
 414                         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
 415                         BIO_free(out);
 416                         return 0;
 417                         }
 418                 ctx->lookup_method = i;
 419                 break;
 420
 421                 case CAPI_CMD_SET_CSP_NAME:
 422                 ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
 423                 break;
 424
 425                 case CAPI_CMD_SET_CSP_TYPE:
 426                 ctx->csptype = i;
 427                 break;
 428
 429                 default:
 430                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
 431                 ret = 0;
 432         }
 433
 434         BIO_free(out);
 435         return ret;
 436
 437         }
 438
 439 static RSA_METHOD capi_rsa_method =
 440         {
 441         "CryptoAPI RSA method",
 442         0,                              /* pub_enc */
 443         0,                              /* pub_dec */
 444         capi_rsa_priv_enc,              /* priv_enc */
 445         capi_rsa_priv_dec,              /* priv_dec */
 446         0,                              /* rsa_mod_exp */
 447         0,                              /* bn_mod_exp */
 448         0,                              /* init */
 449         capi_rsa_free,                  /* finish */
 450         RSA_FLAG_SIGN_VER,              /* flags */
 451         NULL,                           /* app_data */
 452         capi_rsa_sign,                  /* rsa_sign */
 453         0                               /* rsa_verify */
 454         };
 455
 456 static DSA_METHOD capi_dsa_method =
 457         {
 458         "CryptoAPI DSA method",
 459         capi_dsa_do_sign,               /* dsa_do_sign */
 460         0,                              /* dsa_sign_setup */
 461         0,                              /* dsa_do_verify */
 462         0,                              /* dsa_mod_exp */
 463         0,                              /* bn_mod_exp */
 464         0,                              /* init */
 465         capi_dsa_free,                  /* finish */
 466         0,                              /* flags */
 467         NULL,                           /* app_data */
 468         0,                              /* dsa_paramgen */
 469         0                               /* dsa_keygen */
 470         };
 471
 472 static int capi_init(ENGINE *e)
 473         {
 474         CAPI_CTX *ctx;
 475         const RSA_METHOD *ossl_rsa_meth;
 476         const DSA_METHOD *ossl_dsa_meth;
 477
 478         if (capi_idx < 0)
 479                 {
 480                 capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 481                 if (capi_idx < 0)
 482                         goto memerr;
 483
 484                 cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 485
 486                 /* Setup RSA_METHOD */
 487                 rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 488                 ossl_rsa_meth = RSA_PKCS1_SSLeay();
 489                 capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 490                 capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 491                 capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 492                 capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 493
 494                 /* Setup DSA Method */
 495                 dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 496                 ossl_dsa_meth = DSA_OpenSSL();
 497                 capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 498                 capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 499                 capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 500                 }
 501
 502         ctx = capi_ctx_new();
 503         if (!ctx)
 504                 goto memerr;
 505
 506         ENGINE_set_ex_data(e, capi_idx, ctx);
 507
 508 #ifdef OPENSSL_CAPIENG_DIALOG
 509         {
 510         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 511         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 512         if (cryptui)
 513                 ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
 514         if (kernel)
 515                 ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
 516         if (cryptui && !OPENSSL_isservice())
 517                 ctx->client_cert_select = cert_select_dialog;
 518         }
 519 #endif
 520
 521
 522         return 1;
 523
 524         memerr:
 525         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 526         return 0;
 527
 528         return 1;
 529         }
 530
 531 static int capi_destroy(ENGINE *e)
 532         {
 533         ERR_unload_CAPI_strings();
 534         return 1;
 535         }
 536
 537 static int capi_finish(ENGINE *e)
 538         {
 539         CAPI_CTX *ctx;
 540         ctx = ENGINE_get_ex_data(e, capi_idx);
 541         capi_ctx_free(ctx);
 542         ENGINE_set_ex_data(e, capi_idx, NULL);
 543         return 1;
 544         }
 545
 546
 547 /* CryptoAPI key application data. This contains
 548  * a handle to the private key container (for sign operations)
 549  * and a handle to the key (for decrypt operations).
 550  */
 551
 552 struct CAPI_KEY_st
 553         {
 554         /* Associated certificate context (if any) */
 555         PCCERT_CONTEXT pcert;
 556         HCRYPTPROV hprov;
 557         HCRYPTKEY key;
 558         DWORD keyspec;
 559         };
 560
 561 static int bind_capi(ENGINE *e)
 562         {
 563         if (!ENGINE_set_id(e, engine_capi_id)
 564                 || !ENGINE_set_name(e, engine_capi_name)
 565                 || !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL)
 566                 || !ENGINE_set_init_function(e, capi_init)
 567                 || !ENGINE_set_finish_function(e, capi_finish)
 568                 || !ENGINE_set_destroy_function(e, capi_destroy)
 569                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 570                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 571                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 572                 || !ENGINE_set_load_ssl_client_cert_function(e,
 573                                                 capi_load_ssl_client_cert)
 574                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 575                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 576                         return 0;
 577         ERR_load_CAPI_strings();
 578
 579         return 1;
 580
 581         }
 582
 583 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 584 static int bind_helper(ENGINE *e, const char *id)
 585         {
 586         if(id && (strcmp(id, engine_capi_id) != 0))
 587                 return 0;
 588         if(!bind_capi(e))
 589                 return 0;
 590         return 1;
 591         }
 592 IMPLEMENT_DYNAMIC_CHECK_FN()
 593 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 594 #else
 595 static ENGINE *engine_capi(void)
 596         {
 597         ENGINE *ret = ENGINE_new();
 598         if(!ret)
 599                 return NULL;
 600         if(!bind_capi(ret))
 601                 {
 602                 ENGINE_free(ret);
 603                 return NULL;
 604                 }
 605         return ret;
 606         }
 607
 608 void ENGINE_load_capi(void)
 609         {
 610         /* Copied from eng_[openssl|dyn].c */
 611         ENGINE *toadd = engine_capi();
 612         if(!toadd) return;
 613         ENGINE_add(toadd);
 614         ENGINE_free(toadd);
 615         ERR_clear_error();
 616         }
 617 #endif
 618
 619
 620 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 621         {
 622         int i;
 623         /* Reverse buffer in place: since this is a keyblob structure
 624          * that will be freed up after conversion anyway it doesn't
 625          * matter if we change it.
 626          */
 627         for(i = 0; i < binlen / 2; i++)
 628                 {
 629                 unsigned char c;
 630                 c = bin[i];
 631                 bin[i] = bin[binlen - i - 1];
 632                 bin[binlen - i - 1] = c;
 633                 }
 634
 635         if (!BN_bin2bn(bin, binlen, bn))
 636                 return 0;
 637         return 1;
 638         }
 639
 640 /* Given a CAPI_KEY get an EVP_PKEY structure */
 641
 642 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 643         {
 644         unsigned char *pubkey = NULL;
 645         DWORD len;
 646         BLOBHEADER *bh;
 647         RSA *rkey = NULL;
 648         DSA *dkey = NULL;
 649         EVP_PKEY *ret = NULL;
 650         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 651                 {
 652                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 653                 capi_addlasterror();
 654                 return NULL;
 655                 }
 656
 657         pubkey = OPENSSL_malloc(len);
 658
 659         if (!pubkey)
 660                 goto memerr;
 661
 662         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 663                 {
 664                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 665                 capi_addlasterror();
 666                 goto err;
 667                 }
 668
 669         bh = (BLOBHEADER *)pubkey;
 670         if (bh->bType != PUBLICKEYBLOB)
 671                 {
 672                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 673                 goto err;
 674                 }
 675         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 676                 {
 677                 RSAPUBKEY *rp;
 678                 DWORD rsa_modlen;
 679                 unsigned char *rsa_modulus;
 680                 rp = (RSAPUBKEY *)(bh + 1);
 681                 if (rp->magic != 0x31415352)
 682                         {
 683                         char magstr[10];
 684                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 685                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 686                         ERR_add_error_data(2, "magic=0x", magstr);
 687                         goto err;
 688                         }
 689                 rsa_modulus = (unsigned char *)(rp + 1);
 690                 rkey = RSA_new_method(eng);
 691                 if (!rkey)
 692                         goto memerr;
 693
 694                 rkey->e = BN_new();
 695                 rkey->n = BN_new();
 696
 697                 if (!rkey->e || !rkey->n)
 698                         goto memerr;
 699
 700                 if (!BN_set_word(rkey->e, rp->pubexp))
 701                         goto memerr;
 702
 703                 rsa_modlen = rp->bitlen / 8;
 704                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 705                         goto memerr;
 706
 707                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 708
 709                 if (!(ret = EVP_PKEY_new()))
 710                         goto memerr;
 711
 712                 EVP_PKEY_assign_RSA(ret, rkey);
 713                 rkey = NULL;
 714
 715                 }
 716         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 717                 {
 718                 DSSPUBKEY *dp;
 719                 DWORD dsa_plen;
 720                 unsigned char *btmp;
 721                 dp = (DSSPUBKEY *)(bh + 1);
 722                 if (dp->magic != 0x31535344)
 723                         {
 724                         char magstr[10];
 725                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 726                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 727                         ERR_add_error_data(2, "magic=0x", magstr);
 728                         goto err;
 729                         }
 730                 dsa_plen = dp->bitlen / 8;
 731                 btmp = (unsigned char *)(dp + 1);
 732                 dkey = DSA_new_method(eng);
 733                 if (!dkey)
 734                         goto memerr;
 735                 dkey->p = BN_new();
 736                 dkey->q = BN_new();
 737                 dkey->g = BN_new();
 738                 dkey->pub_key = BN_new();
 739                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 740                         goto memerr;
 741                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 742                         goto memerr;
 743                 btmp += dsa_plen;
 744                 if (!lend_tobn(dkey->q, btmp, 20))
 745                         goto memerr;
 746                 btmp += 20;
 747                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 748                         goto memerr;
 749                 btmp += dsa_plen;
 750                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 751                         goto memerr;
 752                 btmp += dsa_plen;
 753
 754                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 755
 756                 if (!(ret = EVP_PKEY_new()))
 757                         goto memerr;
 758
 759                 EVP_PKEY_assign_DSA(ret, dkey);
 760                 dkey = NULL;
 761                 }
 762         else
 763                 {
 764                 char algstr[10];
 765                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 766                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 767                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 768                 goto err;
 769                 }
 770
 771
 772         err:
 773         if (pubkey)
 774                 OPENSSL_free(pubkey);
 775         if (!ret)
 776                 {
 777                 if (rkey)
 778                         RSA_free(rkey);
 779                 if (dkey)
 780                         DSA_free(dkey);
 781                 }
 782
 783         return ret;
 784
 785 memerr:
 786         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 787         goto err;
 788
 789         }
 790
 791 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 792         UI_METHOD *ui_method, void *callback_data)
 793         {
 794         CAPI_CTX *ctx;
 795         CAPI_KEY *key;
 796         EVP_PKEY *ret;
 797         ctx = ENGINE_get_ex_data(eng, capi_idx);
 798
 799         if (!ctx)
 800                 {
 801                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 802                 return NULL;
 803                 }
 804
 805         key = capi_find_key(ctx, key_id);
 806
 807         if (!key)
 808                 return NULL;
 809
 810         ret = capi_get_pkey(eng, key);
 811
 812         if (!ret)
 813                 capi_free_key(key);
 814         return ret;
 815
 816         }
 817
 818 /* CryptoAPI RSA operations */
 819
 820 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 821                 unsigned char *to, RSA *rsa, int padding)
 822         {
 823         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 824         return -1;
 825         }
 826
 827 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 828              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 829         {
 830         ALG_ID alg;
 831         HCRYPTHASH hash;
 832         DWORD slen;
 833         unsigned int i;
 834         int ret = -1;
 835         CAPI_KEY *capi_key;
 836         CAPI_CTX *ctx;
 837
 838         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 839
 840         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 841
 842         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 843         if (!capi_key)
 844                 {
 845                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 846                 return -1;
 847                 }
 848 /* Convert the signature type to a CryptoAPI algorithm ID */
 849         switch(dtype)
 850                 {
 851         case NID_sha256:
 852                 alg = CALG_SHA_256;
 853                 break;
 854
 855         case NID_sha384:
 856                 alg = CALG_SHA_384;
 857                 break;
 858
 859         case NID_sha512:
 860                 alg = CALG_SHA_512;
 861                 break;
 862
 863         case NID_sha1:
 864                 alg = CALG_SHA1;
 865                 break;
 866
 867         case NID_md5:
 868                 alg = CALG_MD5;
 869                 break;
 870
 871         case NID_md5_sha1:
 872                 alg = CALG_SSL3_SHAMD5;
 873                 break;
 874         default:
 875                 {
 876                 char algstr[10];
 877                 BIO_snprintf(algstr, 10, "%lx", dtype);
 878                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 879                 ERR_add_error_data(2, "NID=0x", algstr);
 880                 return -1;
 881                 }
 882         }
 883
 884
 885
 886 /* Create the hash object */
 887         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 888                 {
 889                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 890                 capi_addlasterror();
 891                 return -1;
 892                 }
 893 /* Set the hash value to the value passed */
 894
 895         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 896                 {
 897                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 898                 capi_addlasterror();
 899                 goto err;
 900                 }
 901
 902
 903 /* Finally sign it */
 904         slen = RSA_size(rsa);
 905         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 906                 {
 907                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 908                 capi_addlasterror();
 909                 goto err;
 910                 }
 911         else
 912                 {
 913                 ret = 1;
 914                 /* Inplace byte reversal of signature */
 915                 for(i = 0; i < slen / 2; i++)
 916                         {
 917                         unsigned char c;
 918                         c = sigret[i];
 919                         sigret[i] = sigret[slen - i - 1];
 920                         sigret[slen - i - 1] = c;
 921                         }
 922                 *siglen = slen;
 923                 }
 924
 925         /* Now cleanup */
 926
 927 err:
 928         CryptDestroyHash(hash);
 929
 930         return ret;
 931         }
 932
 933 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 934                 unsigned char *to, RSA *rsa, int padding)
 935         {
 936         int i;
 937         unsigned char *tmpbuf;
 938         CAPI_KEY *capi_key;
 939         CAPI_CTX *ctx;
 940         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 941
 942         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 943
 944
 945         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 946         if (!capi_key)
 947                 {
 948                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 949                 return -1;
 950                 }
 951
 952         if(padding != RSA_PKCS1_PADDING)
 953                 {
 954                 char errstr[10];
 955                 BIO_snprintf(errstr, 10, "%d", padding);
 956                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 957                 ERR_add_error_data(2, "padding=", errstr);
 958                 return -1;
 959                 }
 960
 961         /* Create temp reverse order version of input */
 962         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 963                 {
 964                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 965                 return -1;
 966                 }
 967         for(i = 0; i < flen; i++)
 968                 tmpbuf[flen - i - 1] = from[i];
 969
 970         /* Finally decrypt it */
 971         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 972                 {
 973                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 974                 capi_addlasterror();
 975                 OPENSSL_free(tmpbuf);
 976                 return -1;
 977                 }
 978         else memcpy(to, tmpbuf, flen);
 979
 980         OPENSSL_free(tmpbuf);
 981
 982         return flen;
 983         }
 984
 985 static int capi_rsa_free(RSA *rsa)
 986         {
 987         CAPI_KEY *capi_key;
 988         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 989         capi_free_key(capi_key);
 990         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 991         return 1;
 992         }
 993
 994 /* CryptoAPI DSA operations */
 995
 996 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 997                                                                 DSA *dsa)
 998         {
 999         HCRYPTHASH hash;
1000         DWORD slen;
1001         DSA_SIG *ret = NULL;
1002         CAPI_KEY *capi_key;
1003         CAPI_CTX *ctx;
1004         unsigned char csigbuf[40];
1005
1006         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
1007
1008         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
1009
1010         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1011
1012         if (!capi_key)
1013                 {
1014                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
1015                 return NULL;
1016                 }
1017
1018         if (dlen != 20)
1019                 {
1020                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
1021                 return NULL;
1022                 }
1023
1024         /* Create the hash object */
1025         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
1026                 {
1027                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
1028                 capi_addlasterror();
1029                 return NULL;
1030                 }
1031
1032         /* Set the hash value to the value passed */
1033         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
1034                 {
1035                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
1036                 capi_addlasterror();
1037                 goto err;
1038                 }
1039
1040
1041         /* Finally sign it */
1042         slen = sizeof(csigbuf);
1043         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
1044                 {
1045                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
1046                 capi_addlasterror();
1047                 goto err;
1048                 }
1049         else
1050                 {
1051                 ret = DSA_SIG_new();
1052                 if (!ret)
1053                         goto err;
1054                 ret->r = BN_new();
1055                 ret->s = BN_new();
1056                 if (!ret->r || !ret->s)
1057                         goto err;
1058                 if (!lend_tobn(ret->r, csigbuf, 20)
1059                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1060                         {
1061                         DSA_SIG_free(ret);
1062                         ret = NULL;
1063                         goto err;
1064                         }
1065                 }
1066
1067         /* Now cleanup */
1068
1069 err:
1070         OPENSSL_cleanse(csigbuf, 40);
1071         CryptDestroyHash(hash);
1072         return ret;
1073         }
1074
1075 static int capi_dsa_free(DSA *dsa)
1076         {
1077         CAPI_KEY *capi_key;
1078         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1079         capi_free_key(capi_key);
1080         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1081         return 1;
1082         }
1083
1084 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1085         {
1086         BIO *out;
1087
1088         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1089                 return;
1090         out = BIO_new_file(ctx->debug_file, "a+");
1091         if (out == NULL)
1092                 {
1093                 CAPIerr(CAPI_F_CAPI_VTRACE, CAPI_R_FILE_OPEN_ERROR);
1094                 return;
1095                 }
1096         BIO_vprintf(out, format, argptr);
1097         BIO_free(out);
1098         }
1099
1100 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1101         {
1102         va_list args;
1103         va_start(args, format);
1104         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1105         va_end(args);
1106         }
1107
1108 static void capi_addlasterror(void)
1109         {
1110         capi_adderror(GetLastError());
1111         }
1112
1113 static void capi_adderror(DWORD err)
1114         {
1115         char errstr[10];
1116         BIO_snprintf(errstr, 10, "%lX", err);
1117         ERR_add_error_data(2, "Error code= 0x", errstr);
1118         }
1119
1120 static char *wide_to_asc(LPCWSTR wstr)
1121         {
1122         char *str;
1123         int len_0,sz;
1124
1125         if (!wstr)
1126                 return NULL;
1127         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1128         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1129         if (!sz)
1130                 {
1131                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1132                 return NULL;
1133                 }
1134         str = OPENSSL_malloc(sz);
1135         if (!str)
1136                 {
1137                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1138                 return NULL;
1139                 }
1140         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1141                 {
1142                 OPENSSL_free(str);
1143                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1144                 return NULL;
1145                 }
1146         return str;
1147         }
1148
1149 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1150         {
1151         DWORD len, err;
1152         LPTSTR name;
1153         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1154         if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len))
1155                 {
1156                 err = GetLastError();
1157                 if (err == ERROR_NO_MORE_ITEMS)
1158                         return 2;
1159                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1160                 capi_adderror(err);
1161                 return 0;
1162                 }
1163         name = OPENSSL_malloc(len);
1164         if (name == NULL)
1165                 {
1166                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, ERR_R_MALLOC_FAILURE);
1167                 return 0;
1168                 }
1169         if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
1170                 {
1171                 err = GetLastError();
1172                 OPENSSL_free(name);
1173                 if (err == ERROR_NO_MORE_ITEMS)
1174                         return 2;
1175                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1176                 capi_adderror(err);
1177                 return 0;
1178                 }
1179         if (sizeof(TCHAR) != sizeof(char))
1180                 {
1181                 *pname = wide_to_asc((WCHAR *)name);
1182                 OPENSSL_free(name);
1183                 if (*pname == NULL)
1184                         return 0;
1185                 }
1186         else
1187                 *pname = (char *)name;
1188         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", *pname, *ptype);
1189
1190         return 1;
1191         }
1192
1193 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1194         {
1195         DWORD idx, ptype;
1196         int ret;
1197         LPSTR provname = NULL;
1198         CAPI_trace(ctx, "capi_list_providers\n");
1199         BIO_printf(out, "Available CSPs:\n");
1200         for(idx = 0; ; idx++)
1201                 {
1202                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1203                 if (ret == 2)
1204                         break;
1205                 if (ret == 0)
1206                         break;
1207                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1208                 OPENSSL_free(provname);
1209                 }
1210         return 1;
1211         }
1212
1213 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1214         {
1215         int ret = 1;
1216         HCRYPTPROV hprov;
1217         DWORD err, idx, flags, buflen = 0, clen;
1218         LPSTR cname;
1219         LPTSTR cspname = NULL;
1220
1221         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1222         if (ctx->cspname && sizeof(TCHAR)!=sizeof(char))
1223                 {
1224                 if ((clen=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)))
1225                         {
1226                         cspname = alloca(clen*sizeof(WCHAR));
1227                         MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,(WCHAR *)cspname,clen);
1228                         }
1229                 if (!cspname)
1230                         {
1231                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1232                         capi_addlasterror();
1233                         return 0;
1234                         }
1235                 }
1236         else
1237                 cspname = (TCHAR *)ctx->cspname;
1238         if (!CryptAcquireContext(&hprov, NULL, cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1239                 {
1240                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1241                 capi_addlasterror();
1242                 return 0;
1243                 }
1244         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1245                 {
1246                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1247                 capi_addlasterror();
1248                 CryptReleaseContext(hprov, 0);
1249                 return 0;
1250                 }
1251         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1252         if (buflen == 0)
1253                 buflen = 1024;
1254         cname = OPENSSL_malloc(buflen);
1255         if (!cname)
1256                 {
1257                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1258                 goto err;
1259                 }
1260
1261         for (idx = 0;;idx++)
1262                 {
1263                 clen = buflen;
1264                 cname[0] = 0;
1265
1266                 if (idx == 0)
1267                         flags = CRYPT_FIRST;
1268                 else
1269                         flags = 0;
1270                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, (BYTE *)cname, &clen, flags))
1271                         {
1272                         err = GetLastError();
1273                         if (err == ERROR_NO_MORE_ITEMS)
1274                                 goto done;
1275                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1276                         capi_adderror(err);
1277                         goto err;
1278                         }
1279                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1280                 if (!cname[0] && (clen == buflen))
1281                         {
1282                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1283                         goto done;
1284                         }
1285                 BIO_printf(out, "%d. %s\n", idx, cname);
1286                 }
1287         err:
1288
1289         ret = 0;
1290
1291         done:
1292         if (cname)
1293                 OPENSSL_free(cname);
1294         CryptReleaseContext(hprov, 0);
1295
1296         return ret;
1297         }
1298
1299 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1300         {
1301         DWORD len;
1302         CRYPT_KEY_PROV_INFO *pinfo;
1303
1304         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1305                 return NULL;
1306         pinfo = OPENSSL_malloc(len);
1307         if (!pinfo)
1308                 {
1309                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1310                 return NULL;
1311                 }
1312         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1313                 {
1314                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1315                 capi_addlasterror();
1316                 OPENSSL_free(pinfo);
1317                 return NULL;
1318                 }
1319         return pinfo;
1320         }
1321
1322 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1323         {
1324         char *provname = NULL, *contname = NULL;
1325         if (!pinfo)
1326                 {
1327                 BIO_printf(out, "  No Private Key\n");
1328                 return;
1329                 }
1330         provname = wide_to_asc(pinfo->pwszProvName);
1331         contname = wide_to_asc(pinfo->pwszContainerName);
1332         if (!provname || !contname)
1333                 goto err;
1334
1335         BIO_printf(out, "  Private Key Info:\n");
1336         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1337         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1338         err:
1339         if (provname)
1340                 OPENSSL_free(provname);
1341         if (contname)
1342                 OPENSSL_free(contname);
1343         }
1344
1345 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1346         {
1347         LPWSTR wfname;
1348         DWORD dlen;
1349
1350         CAPI_trace(ctx, "capi_cert_get_fname\n");
1351         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1352                 return NULL;
1353         wfname = OPENSSL_malloc(dlen);
1354         if (wfname == NULL)
1355                 return NULL;
1356         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1357                 {
1358                 char *fname = wide_to_asc(wfname);
1359                 OPENSSL_free(wfname);
1360                 return fname;
1361                 }
1362         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1363         capi_addlasterror();
1364
1365         OPENSSL_free(wfname);
1366         return NULL;
1367         }
1368
1369
1370 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1371         {
1372         X509 *x;
1373         unsigned char *p;
1374         unsigned long flags = ctx->dump_flags;
1375         if (flags & CAPI_DMP_FNAME)
1376                 {
1377                 char *fname;
1378                 fname = capi_cert_get_fname(ctx, cert);
1379                 if (fname)
1380                         {
1381                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1382                         OPENSSL_free(fname);
1383                         }
1384                 else
1385                         BIO_printf(out, "  <No Friendly Name>\n");
1386                 }
1387
1388         p = cert->pbCertEncoded;
1389         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1390         if (!x)
1391                 BIO_printf(out, "  <Can't parse certificate>\n");
1392         if (flags & CAPI_DMP_SUMMARY)
1393                 {
1394                 BIO_printf(out, "  Subject: ");
1395                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1396                 BIO_printf(out, "\n  Issuer: ");
1397                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1398                 BIO_printf(out, "\n");
1399                 }
1400         if (flags & CAPI_DMP_FULL)
1401                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1402
1403         if (flags & CAPI_DMP_PKEYINFO)
1404                 {
1405                 CRYPT_KEY_PROV_INFO *pinfo;
1406                 pinfo = capi_get_prov_info(ctx, cert);
1407                 capi_dump_prov_info(ctx, out, pinfo);
1408                 if (pinfo)
1409                         OPENSSL_free(pinfo);
1410                 }
1411
1412         if (flags & CAPI_DMP_PEM)
1413                 PEM_write_bio_X509(out, x);
1414         X509_free(x);
1415         }
1416
1417 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1418         {
1419         HCERTSTORE hstore;
1420
1421         if (!storename)
1422                 storename = ctx->storename;
1423         if (!storename)
1424                 storename = "MY";
1425         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1426
1427         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1428                                 ctx->store_flags, storename);
1429         if (!hstore)
1430                 {
1431                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1432                 capi_addlasterror();
1433                 }
1434         return hstore;
1435         }
1436
1437 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1438         {
1439         char *storename;
1440         int idx;
1441         int ret = 1;
1442         HCERTSTORE hstore;
1443         PCCERT_CONTEXT cert = NULL;
1444
1445         storename = ctx->storename;
1446         if (!storename)
1447                 storename = "MY";
1448         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1449
1450         hstore = capi_open_store(ctx, storename);
1451         if (!hstore)
1452                 return 0;
1453         if (id)
1454                 {
1455                 cert = capi_find_cert(ctx, id, hstore);
1456                 if (!cert)
1457                         {
1458                         ret = 0;
1459                         goto err;
1460                         }
1461                 capi_dump_cert(ctx, out, cert);
1462                 CertFreeCertificateContext(cert);
1463                 }
1464         else
1465                 {
1466                 for(idx = 0;;idx++)
1467                         {
1468                         cert = CertEnumCertificatesInStore(hstore, cert);
1469                         if (!cert)
1470                                 break;
1471                         BIO_printf(out, "Certificate %d\n", idx);
1472                         capi_dump_cert(ctx, out, cert);
1473                         }
1474                 }
1475         err:
1476         CertCloseStore(hstore, 0);
1477         return ret;
1478         }
1479
1480 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1481         {
1482         PCCERT_CONTEXT cert = NULL;
1483         char *fname = NULL;
1484         int match;
1485         switch(ctx->lookup_method)
1486                 {
1487                 case CAPI_LU_SUBSTR:
1488                         return CertFindCertificateInStore(hstore,
1489                                         X509_ASN_ENCODING, 0,
1490                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1491                 case CAPI_LU_FNAME:
1492                         for(;;)
1493                                 {
1494                                 cert = CertEnumCertificatesInStore(hstore, cert);
1495                                 if (!cert)
1496                                         return NULL;
1497                                 fname = capi_cert_get_fname(ctx, cert);
1498                                 if (fname)
1499                                         {
1500                                         if (strcmp(fname, id))
1501                                                 match = 0;
1502                                         else
1503                                                 match = 1;
1504                                         OPENSSL_free(fname);
1505                                         if (match)
1506                                                 return cert;
1507                                         }
1508                                 }
1509                 default:
1510                         return NULL;
1511                 }
1512         }
1513
1514 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const TCHAR *contname, TCHAR *provname, DWORD ptype, DWORD keyspec)
1515         {
1516         CAPI_KEY *key;
1517         DWORD dwFlags = 0;
1518         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1519         if (key == NULL)
1520                 return NULL;
1521         if (sizeof(TCHAR)==sizeof(char))
1522                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1523                                                 contname, provname, ptype);
1524         else if (ctx && ctx->debug_level>=CAPI_DBG_TRACE && ctx->debug_file)
1525                 {
1526                 /* above 'if' is optimization to minimize malloc-ations */
1527                 char *_contname = wide_to_asc((WCHAR *)contname);
1528                 char *_provname = wide_to_asc((WCHAR *)provname);
1529
1530                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1531                                                 _contname, _provname, ptype);
1532                 if (_provname) OPENSSL_free(_provname);
1533                 if (_contname) OPENSSL_free(_contname);
1534                 }
1535         if(ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
1536                 dwFlags = CRYPT_MACHINE_KEYSET;
1537         if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, dwFlags))
1538                 {
1539                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1540                 capi_addlasterror();
1541                 goto err;
1542                 }
1543         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1544                 {
1545                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1546                 capi_addlasterror();
1547                 CryptReleaseContext(key->hprov, 0);
1548                 goto err;
1549                 }
1550         key->keyspec = keyspec;
1551         key->pcert = NULL;
1552         return key;
1553
1554         err:
1555         OPENSSL_free(key);
1556         return NULL;
1557         }
1558
1559 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1560         {
1561         CAPI_KEY *key = NULL;
1562         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1563         char *provname = NULL, *contname = NULL;
1564         pinfo = capi_get_prov_info(ctx, cert);
1565         if (!pinfo)
1566                 goto err;
1567         if (sizeof(TCHAR) != sizeof(char))
1568                 key = capi_get_key(ctx, (TCHAR *)pinfo->pwszContainerName,
1569                                 (TCHAR *)pinfo->pwszProvName,
1570                                 pinfo->dwProvType, pinfo->dwKeySpec);
1571         else
1572                 {
1573                 provname = wide_to_asc(pinfo->pwszProvName);
1574                 contname = wide_to_asc(pinfo->pwszContainerName);
1575                 if (!provname || !contname)
1576                         goto err;
1577                 key = capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
1578                                 pinfo->dwProvType, pinfo->dwKeySpec);
1579                 }
1580
1581         err:
1582         if (pinfo)
1583                 OPENSSL_free(pinfo);
1584         if (provname)
1585                 OPENSSL_free(provname);
1586         if (contname)
1587                 OPENSSL_free(contname);
1588         return key;
1589         }
1590
1591 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1592         {
1593         PCCERT_CONTEXT cert;
1594         HCERTSTORE hstore;
1595         CAPI_KEY *key = NULL;
1596         switch (ctx->lookup_method)
1597                 {
1598                 case CAPI_LU_SUBSTR:
1599                 case CAPI_LU_FNAME:
1600                 hstore = capi_open_store(ctx, NULL);
1601                 if (!hstore)
1602                         return NULL;
1603                 cert = capi_find_cert(ctx, id, hstore);
1604                 if (cert)
1605                         {
1606                         key = capi_get_cert_key(ctx, cert);
1607                         CertFreeCertificateContext(cert);
1608                         }
1609                 CertCloseStore(hstore, 0);
1610                 break;
1611
1612                 case CAPI_LU_CONTNAME:
1613                 if (sizeof(TCHAR)!=sizeof(char))
1614                         {
1615                         WCHAR *contname, *provname;
1616                         DWORD len;
1617
1618                         if ((len=MultiByteToWideChar(CP_ACP,0,id,-1,NULL,0)) &&
1619                             (contname=alloca(len*sizeof(WCHAR)),
1620                              MultiByteToWideChar(CP_ACP,0,id,-1,contname,len)) &&
1621                             (len=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)) &&
1622                             (provname=alloca(len*sizeof(WCHAR)),
1623                              MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,provname,len)))
1624                                 key = capi_get_key(ctx,(TCHAR *)contname,
1625                                                 (TCHAR *)provname,
1626                                                 ctx->csptype,ctx->keytype);
1627                         }
1628                 else
1629                         key = capi_get_key(ctx, (TCHAR *)id,
1630                                                 (TCHAR *)ctx->cspname,
1631                                                 ctx->csptype,ctx->keytype);
1632                 break;
1633                 }
1634
1635         return key;
1636         }
1637
1638 void capi_free_key(CAPI_KEY *key)
1639         {
1640         if (!key)
1641                 return;
1642         CryptDestroyKey(key->key);
1643         CryptReleaseContext(key->hprov, 0);
1644         if (key->pcert)
1645                 CertFreeCertificateContext(key->pcert);
1646         OPENSSL_free(key);
1647         }
1648
1649
1650 /* Initialize a CAPI_CTX structure */
1651
1652 static CAPI_CTX *capi_ctx_new()
1653         {
1654         CAPI_CTX *ctx;
1655         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1656         if (!ctx)
1657                 {
1658                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1659                 return NULL;
1660                 }
1661         ctx->cspname = NULL;
1662         ctx->csptype = PROV_RSA_FULL;
1663         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1664         ctx->keytype = AT_KEYEXCHANGE;
1665         ctx->storename = NULL;
1666         ctx->ssl_client_store = NULL;
1667         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1668                                 CERT_STORE_READONLY_FLAG |
1669                                 CERT_SYSTEM_STORE_CURRENT_USER;
1670         ctx->lookup_method = CAPI_LU_SUBSTR;
1671         ctx->debug_level = 0;
1672         ctx->debug_file = NULL;
1673         ctx->client_cert_select = cert_select_simple;
1674         return ctx;
1675         }
1676
1677 static void capi_ctx_free(CAPI_CTX *ctx)
1678         {
1679         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1680         if (!ctx)
1681                 return;
1682         if (ctx->cspname)
1683                 OPENSSL_free(ctx->cspname);
1684         if (ctx->debug_file)
1685                 OPENSSL_free(ctx->debug_file);
1686         if (ctx->storename)
1687                 OPENSSL_free(ctx->storename);
1688         if (ctx->ssl_client_store)
1689                 OPENSSL_free(ctx->ssl_client_store);
1690         OPENSSL_free(ctx);
1691         }
1692
1693 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1694         {
1695         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1696         if (check)
1697                 {
1698                 HCRYPTPROV hprov;
1699                 LPTSTR name=NULL;
1700
1701                 if (sizeof(TCHAR)!=sizeof(char))
1702                         {
1703                         DWORD len;
1704                         if ((len=MultiByteToWideChar(CP_ACP,0,pname,-1,NULL,0)))
1705                                 {
1706                                 name = alloca(len*sizeof(WCHAR));
1707                                 MultiByteToWideChar(CP_ACP,0,pname,-1,(WCHAR *)name,len);
1708                                 }
1709                         }
1710                 else
1711                         name = (TCHAR *)pname;
1712
1713                 if (!name || !CryptAcquireContext(&hprov, NULL, name, type,
1714                                                 CRYPT_VERIFYCONTEXT))
1715                         {
1716                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1717                         capi_addlasterror();
1718                         return 0;
1719                         }
1720                 CryptReleaseContext(hprov, 0);
1721                 }
1722         if (ctx->cspname)
1723                 OPENSSL_free(ctx->cspname);
1724         ctx->cspname = BUF_strdup(pname);
1725         ctx->csptype = type;
1726         return 1;
1727         }
1728
1729 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1730         {
1731         LPSTR pname;
1732         DWORD type;
1733         int res;
1734         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1735                 return 0;
1736         res = capi_ctx_set_provname(ctx, pname, type, 0);
1737         OPENSSL_free(pname);
1738         return res;
1739         }
1740
1741 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1742         {
1743         int i;
1744         X509_NAME *nm;
1745         /* Special case: empty list: match anything */
1746         if (sk_X509_NAME_num(ca_dn) <= 0)
1747                 return 1;
1748         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1749                 {
1750                 nm = sk_X509_NAME_value(ca_dn, i);
1751                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1752                                 return 1;
1753                 }
1754         return 0;
1755         }
1756
1757
1758
1759 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1760         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1761         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1762         {
1763         STACK_OF(X509) *certs = NULL;
1764         X509 *x;
1765         char *storename;
1766         const char *p;
1767         int i, client_cert_idx;
1768         HCERTSTORE hstore;
1769         PCCERT_CONTEXT cert = NULL, excert = NULL;
1770         CAPI_CTX *ctx;
1771         CAPI_KEY *key;
1772         ctx = ENGINE_get_ex_data(e, capi_idx);
1773
1774         *pcert = NULL;
1775         *pkey = NULL;
1776
1777         storename = ctx->ssl_client_store;
1778         if (!storename)
1779                 storename = "MY";
1780
1781         hstore = capi_open_store(ctx, storename);
1782         if (!hstore)
1783                 return 0;
1784         /* Enumerate all certificates collect any matches */
1785         for(i = 0;;i++)
1786                 {
1787                 cert = CertEnumCertificatesInStore(hstore, cert);
1788                 if (!cert)
1789                         break;
1790                 p = cert->pbCertEncoded;
1791                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1792                 if (!x)
1793                         {
1794                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1795                         continue;
1796                         }
1797                 if (cert_issuer_match(ca_dn, x)
1798                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1799                         {
1800                         key = capi_get_cert_key(ctx, cert);
1801                         if (!key)
1802                                 {
1803                                 X509_free(x);
1804                                 continue;
1805                                 }
1806                         /* Match found: attach extra data to it so
1807                          * we can retrieve the key later.
1808                          */
1809                         excert = CertDuplicateCertificateContext(cert);
1810                         key->pcert = excert;
1811                         X509_set_ex_data(x, cert_capi_idx, key);
1812
1813                         if (!certs)
1814                                 certs = sk_X509_new_null();
1815
1816                         sk_X509_push(certs, x);
1817                         }
1818                 else
1819                         X509_free(x);
1820
1821                 }
1822
1823         if (cert)
1824                 CertFreeCertificateContext(cert);
1825         if (hstore)
1826                 CertCloseStore(hstore, 0);
1827
1828         if (!certs)
1829                 return 0;
1830
1831
1832         /* Select the appropriate certificate */
1833
1834         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1835
1836         /* Set the selected certificate and free the rest */
1837
1838         for(i = 0; i < sk_X509_num(certs); i++)
1839                 {
1840                 x = sk_X509_value(certs, i);
1841                 if (i == client_cert_idx)
1842                         *pcert = x;
1843                 else
1844                         {
1845                         key = X509_get_ex_data(x, cert_capi_idx);
1846                         capi_free_key(key);
1847                         X509_free(x);
1848                         }
1849                 }
1850
1851         sk_X509_free(certs);
1852
1853         if (!*pcert)
1854                 return 0;
1855
1856         /* Setup key for selected certificate */
1857
1858         key = X509_get_ex_data(*pcert, cert_capi_idx);
1859         *pkey = capi_get_pkey(e, key);
1860         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1861
1862         return 1;
1863
1864         }
1865
1866
1867 /* Simple client cert selection function: always select first */
1868
1869 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1870         {
1871         return 0;
1872         }
1873
1874 #ifdef OPENSSL_CAPIENG_DIALOG
1875
1876 /* More complex cert selection function, using standard function
1877  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1878  */
1879
1880 /* Definitions which are in cryptuiapi.h but this is not present in older
1881  * versions of headers.
1882  */
1883
1884 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1885 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1886 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1887 #endif
1888
1889 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1890 #define dlg_prompt L"Select a certificate to use for authentication"
1891 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1892                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1893
1894 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1895         {
1896         X509 *x;
1897         HCERTSTORE dstore;
1898         PCCERT_CONTEXT cert;
1899         CAPI_CTX *ctx;
1900         CAPI_KEY *key;
1901         HWND hwnd;
1902         int i, idx = -1;
1903         if (sk_X509_num(certs) == 1)
1904                 return 0;
1905         ctx = ENGINE_get_ex_data(e, capi_idx);
1906         /* Create an in memory store of certificates */
1907         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1908                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1909         if (!dstore)
1910                 {
1911                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1912                 capi_addlasterror();
1913                 goto err;
1914                 }
1915         /* Add all certificates to store */
1916         for(i = 0; i < sk_X509_num(certs); i++)
1917                 {
1918                 x = sk_X509_value(certs, i);
1919                 key = X509_get_ex_data(x, cert_capi_idx);
1920
1921                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1922                                                 CERT_STORE_ADD_NEW, NULL))
1923                         {
1924                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1925                         capi_addlasterror();
1926                         goto err;
1927                         }
1928
1929                 }
1930         hwnd = GetForegroundWindow();
1931         if (!hwnd)
1932                 hwnd = GetActiveWindow();
1933         if (!hwnd && ctx->getconswindow)
1934                 hwnd = ctx->getconswindow();
1935         /* Call dialog to select one */
1936         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1937                                                 dlg_columns, 0, NULL);
1938
1939         /* Find matching cert from list */
1940         if (cert)
1941                 {
1942                 for(i = 0; i < sk_X509_num(certs); i++)
1943                         {
1944                         x = sk_X509_value(certs, i);
1945                         key = X509_get_ex_data(x, cert_capi_idx);
1946                         if (CertCompareCertificate(
1947                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1948                                         cert->pCertInfo,
1949                                         key->pcert->pCertInfo))
1950                                 {
1951                                 idx = i;
1952                                 break;
1953                                 }
1954                         }
1955                 }
1956
1957         err:
1958         if (dstore)
1959                 CertCloseStore(dstore, 0);
1960         return idx;
1961
1962         }
1963 #endif
1964
1965 #else /* !__COMPILE_CAPIENG */
1966 #include <openssl/engine.h>
1967 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1968 OPENSSL_EXPORT
1969 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1970 OPENSSL_EXPORT
1971 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1972 IMPLEMENT_DYNAMIC_CHECK_FN()
1973 #else
1974 void ENGINE_load_capi(void){}
1975 #endif
1976 #endif