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/engine.h>
  60 #include <openssl/rsa.h>
  61 #include <openssl/bn.h>
  62 #include <openssl/pem.h>
  63
  64 #ifdef OPENSSL_SYS_WIN32
  65 #ifndef OPENSSL_NO_CAPIENG
  66
  67 #ifndef _WIN32_WINNT
  68 #define _WIN32_WINNT 0x400
  69 #endif
  70
  71 #include <windows.h>
  72 #include <wincrypt.h>
  73
  74 #include "e_capi_err.h"
  75 #include "e_capi_err.c"
  76
  77
  78 static const char *engine_capi_id = "capi";
  79 static const char *engine_capi_name = "CryptoAPI ENGINE";
  80
  81 typedef struct CAPI_CTX_st CAPI_CTX;
  82 typedef struct CAPI_KEY_st CAPI_KEY;
  83
  84 static void capi_addlasterror(void);
  85 static void capi_adderror(DWORD err);
  86
  87 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...);
  88
  89 static int capi_list_providers(CAPI_CTX *ctx, BIO *out);
  90 static int capi_list_containers(CAPI_CTX *ctx, BIO *out);
  91 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *storename);
  92 void capi_free_key(CAPI_KEY *key);
  93
  94 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore);
  95
  96 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id);
  97
  98 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
  99         UI_METHOD *ui_method, void *callback_data);
 100 static int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 101              unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
 102 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
 103                 unsigned char *to, RSA *rsa, int padding);
 104 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
 105                 unsigned char *to, RSA *rsa, int padding);
 106 static int capi_rsa_free(RSA *rsa);
 107
 108 /* This structure contains CAPI ENGINE specific data:
 109  * it contains various global options and affects how
 110  * other functions behave.
 111  */
 112
 113 #define CAPI_DBG_TRACE  2
 114 #define CAPI_DBG_ERROR  1
 115
 116 struct CAPI_CTX_st {
 117         int debug_level;
 118         char *debug_file;
 119         /* Parameters to use for container lookup */
 120         DWORD keytype;
 121         LPTSTR cspname;
 122         DWORD csptype;
 123         /* Certificate store name to use */
 124         LPTSTR storename;
 125
 126 /* Lookup string meanings in load_private_key */
 127 /* Substring of subject: uses "storename" */
 128 #define CAPI_LU_SUBSTR          0
 129 /* Friendly name: uses storename */
 130 #define CAPI_LU_FNAME           1
 131 /* Container name: uses cspname, keytype */
 132 #define CAPI_LU_CONTNAME        2
 133         int lookup_method;
 134 /* Info to dump with dumpcerts option */
 135 /* Issuer and serial name strings */
 136 #define CAPI_DMP_SUMMARY        0x1
 137 /* Friendly name */
 138 #define CAPI_DMP_FNAME          0x2
 139 /* Full X509_print dump */
 140 #define CAPI_DMP_FULL           0x4
 141 /* Dump PEM format certificate */
 142 #define CAPI_DMP_PEM            0x8
 143 /* Dump pseudo key (if possible) */
 144 #define CAPI_DMP_PSKEY          0x10
 145 /* Dump key info (if possible) */
 146 #define CAPI_DMP_PKEYINFO       0x20
 147
 148         DWORD dump_flags;
 149 };
 150
 151
 152 static CAPI_CTX *capi_ctx_new();
 153 static void capi_ctx_free(CAPI_CTX *ctx);
 154 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
 155 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
 156
 157 #define CAPI_CMD_LIST_CERTS                     ENGINE_CMD_BASE
 158 #define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
 159 #define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
 160 #define CAPI_CMD_DEBUG_FILE                     (ENGINE_CMD_BASE + 3)
 161 #define CAPI_CMD_KEYTYPE                        (ENGINE_CMD_BASE + 4)
 162 #define CAPI_CMD_LIST_CSPS                      (ENGINE_CMD_BASE + 5)
 163 #define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
 164 #define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
 165 #define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
 166 #define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
 167 #define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
 168 #define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
 169
 170 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
 171         {CAPI_CMD_LIST_CERTS,
 172                 "list_certs",
 173                 "List all certificates in store",
 174                 ENGINE_CMD_FLAG_NO_INPUT},
 175         {CAPI_CMD_LOOKUP_CERT,
 176                 "lookup_cert",
 177                 "Lookup and output certificates",
 178                 ENGINE_CMD_FLAG_STRING},
 179         {CAPI_CMD_DEBUG_LEVEL,
 180                 "debug_level",
 181                 "debug level (1=errors, 2=trace)",
 182                 ENGINE_CMD_FLAG_NUMERIC},
 183         {CAPI_CMD_DEBUG_FILE,
 184                 "debug_file",
 185                 "debugging filename)",
 186                 ENGINE_CMD_FLAG_STRING},
 187         {CAPI_CMD_KEYTYPE,
 188                 "key_type",
 189                 "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
 190                 ENGINE_CMD_FLAG_NUMERIC},
 191         {CAPI_CMD_LIST_CSPS,
 192                 "list_csps",
 193                 "List all CSPs",
 194                 ENGINE_CMD_FLAG_NO_INPUT},
 195         {CAPI_CMD_SET_CSP_IDX,
 196                 "csp_idx",
 197                 "Set CSP by index",
 198                 ENGINE_CMD_FLAG_NUMERIC},
 199         {CAPI_CMD_SET_CSP_NAME,
 200                 "csp_name",
 201                 "Set CSP name, (default CSP used if not specified)",
 202                 ENGINE_CMD_FLAG_STRING},
 203         {CAPI_CMD_SET_CSP_TYPE,
 204                 "csp_type",
 205                 "Set CSP type, (default RSA_PROV_FULL)",
 206                 ENGINE_CMD_FLAG_NUMERIC},
 207         {CAPI_CMD_LIST_CONTAINERS,
 208                 "list_containers",
 209                 "list container names",
 210                 ENGINE_CMD_FLAG_NO_INPUT},
 211         {CAPI_CMD_LIST_OPTIONS,
 212                 "list_options",
 213                 "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
 214                 "32=private key info)",
 215                 ENGINE_CMD_FLAG_NUMERIC},
 216         {CAPI_CMD_LOOKUP_METHOD,
 217                 "lookup_method",
 218                 "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
 219                 ENGINE_CMD_FLAG_NUMERIC},
 220
 221         {0, NULL, NULL, 0}
 222         };
 223
 224 static int capi_idx = -1;
 225 static int rsa_capi_idx = -1;
 226 static int dsa_capi_idx = -1;
 227
 228 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 229 {
 230         int ret = 1;
 231         CAPI_CTX *ctx;
 232         BIO *out;
 233         if (capi_idx == -1)
 234                 {
 235                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
 236                 return 0;
 237                 }
 238         ctx = ENGINE_get_ex_data(e, capi_idx);
 239         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 240         switch (cmd)
 241                 {
 242                 case CAPI_CMD_LIST_CSPS:
 243                 ret = capi_list_providers(ctx, out);
 244                 break;
 245
 246                 case CAPI_CMD_LIST_CERTS:
 247                 ret = capi_list_certs(ctx, out, NULL);
 248                 break;
 249
 250                 case CAPI_CMD_LOOKUP_CERT:
 251                 ret = capi_list_certs(ctx, out, p);
 252                 break;
 253
 254                 case CAPI_CMD_LIST_CONTAINERS:
 255                 ret = capi_list_containers(ctx, out);
 256                 break;
 257
 258                 case CAPI_CMD_DEBUG_LEVEL:
 259                 ctx->debug_level = (int)i;
 260                 CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
 261                 break;
 262
 263                 case CAPI_CMD_DEBUG_FILE:
 264                 ctx->debug_file = BUF_strdup(p);
 265                 CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
 266                 break;
 267
 268                 case CAPI_CMD_KEYTYPE:
 269                 ctx->keytype = i;
 270                 CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
 271                 break;
 272
 273                 case CAPI_CMD_SET_CSP_IDX:
 274                 ret = capi_ctx_set_provname_idx(ctx, i);
 275                 break;
 276
 277                 case CAPI_CMD_LIST_OPTIONS:
 278                 ctx->dump_flags = i;
 279                 break;
 280
 281                 case CAPI_CMD_LOOKUP_METHOD:
 282                 if (i < 1 || i > 3)
 283                         {
 284                         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
 285                         return 0;
 286                         }
 287                 ctx->lookup_method = i;
 288                 break;
 289
 290                 case CAPI_CMD_SET_CSP_NAME:
 291                 ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
 292                 break;
 293
 294                 case CAPI_CMD_SET_CSP_TYPE:
 295                 ctx->csptype = i;
 296                 break;
 297
 298                 default:
 299                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
 300                 ret = 0;
 301         }
 302
 303         BIO_free(out);
 304         return ret;
 305
 306 }
 307
 308 static RSA_METHOD capi_rsa_method =
 309         {
 310         "CryptoAPI RSA method",
 311         0,                              /* pub_enc */
 312         0,                              /* pub_dec */
 313         capi_rsa_priv_enc,      /* priv_enc */
 314         capi_rsa_priv_dec,      /* priv_dec */
 315         0,                              /* rsa_mod_exp */
 316         0,                              /* bn_mod_exp */
 317         0,                              /* init */
 318         capi_rsa_free,  /* finish */
 319         RSA_FLAG_SIGN_VER, /* flags */
 320         NULL,                   /* app_data */
 321         capi_rsa_sign,  /* rsa_sign */
 322         0                               /* rsa_verify */
 323         };
 324
 325 static int capi_init(ENGINE *e)
 326         {
 327         CAPI_CTX *ctx;
 328         const RSA_METHOD *ossl_meth;
 329         capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 330
 331         ctx = capi_ctx_new();
 332         if (!ctx || (capi_idx < 0))
 333                 goto memerr;
 334
 335         ENGINE_set_ex_data(e, capi_idx, ctx);
 336         /* Setup RSA_METHOD */
 337         rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 338         dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 339         ossl_meth = RSA_PKCS1_SSLeay();
 340         capi_rsa_method.rsa_pub_enc = ossl_meth->rsa_pub_enc;
 341         capi_rsa_method.rsa_pub_dec = ossl_meth->rsa_pub_dec;
 342         capi_rsa_method.rsa_mod_exp = ossl_meth->rsa_mod_exp;
 343         capi_rsa_method.bn_mod_exp = ossl_meth->bn_mod_exp;
 344
 345         return 1;
 346
 347         memerr:
 348         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 349         return 0;
 350
 351         return 1;
 352         }
 353
 354 static int capi_destroy(ENGINE *e)
 355         {
 356
 357         ERR_unload_CAPI_strings();
 358         return 1;
 359         }
 360
 361 static int capi_finish(ENGINE *e)
 362         {
 363         CAPI_CTX *ctx;
 364         ctx = ENGINE_get_ex_data(e, capi_idx);
 365         capi_ctx_free(ctx);
 366         ENGINE_set_ex_data(e, capi_idx, NULL);
 367         return 1;
 368         }
 369
 370
 371 /* CryptoAPI key application data. This contains
 372  * a handle to the private key container (for sign operations)
 373  * and a handle to the key (for decrypt operations).
 374  */
 375
 376 struct CAPI_KEY_st
 377         {
 378         HCRYPTPROV hprov;
 379         HCRYPTKEY key;
 380         };
 381
 382 static int bind_capi(ENGINE *e)
 383         {
 384         if (!ENGINE_set_id(e, engine_capi_id)
 385                 || !ENGINE_set_name(e, engine_capi_name)
 386                 || !ENGINE_set_init_function(e, capi_init)
 387                 || !ENGINE_set_finish_function(e, capi_finish)
 388                 || !ENGINE_set_destroy_function(e, capi_destroy)
 389                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 390                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 391                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 392                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 393                         return 0;
 394         ERR_load_CAPI_strings();
 395
 396         return 1;
 397
 398         }
 399
 400 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 401 static int bind_helper(ENGINE *e, const char *id)
 402         {
 403         if(id && (strcmp(id, engine_capi_id) != 0))
 404                 return 0;
 405         if(!bind_capi(e))
 406                 return 0;
 407         return 1;
 408         }
 409 IMPLEMENT_DYNAMIC_CHECK_FN()
 410 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 411 #else
 412 static ENGINE *engine_capi(void)
 413         {
 414         ENGINE *ret = ENGINE_new();
 415         if(!ret)
 416                 return NULL;
 417         if(!bind_capi(ret))
 418                 {
 419                 ENGINE_free(ret);
 420                 return NULL;
 421                 }
 422         return ret;
 423         }
 424
 425 void ENGINE_load_capi(void)
 426         {
 427         /* Copied from eng_[openssl|dyn].c */
 428         ENGINE *toadd = engine_capi();
 429         if(!toadd) return;
 430         ENGINE_add(toadd);
 431         ENGINE_free(toadd);
 432         ERR_clear_error();
 433         }
 434 #endif
 435
 436
 437 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 438         {
 439         int i;
 440         /* Reverse buffer in place: since this is a keyblob structure
 441          * that will be freed up after conversion anyway it doesn't
 442          * matter if we change it.
 443          */
 444         for(i = 0; i < binlen / 2; i++)
 445                 {
 446                 unsigned char c;
 447                 c = bin[i];
 448                 bin[i] = bin[binlen - i - 1];
 449                 bin[binlen - i - 1] = c;
 450                 }
 451
 452         if (!BN_bin2bn(bin, binlen, bn))
 453                 return 0;
 454         return 1;
 455         }
 456
 457 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 458         UI_METHOD *ui_method, void *callback_data)
 459         {
 460         EVP_PKEY *ret = NULL;
 461         CAPI_CTX *ctx;
 462         CAPI_KEY *key;
 463         unsigned char *pubkey = NULL;
 464         DWORD len;
 465         BLOBHEADER *bh;
 466         RSA *rkey = NULL;
 467         DSA *dkey = NULL;
 468         ctx = ENGINE_get_ex_data(eng, capi_idx);
 469
 470         if (!ctx)
 471                 {
 472                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 473                 return NULL;
 474                 }
 475
 476         key = capi_find_key(ctx, key_id);
 477
 478         if (!key)
 479                 return NULL;
 480
 481         len = 0;
 482         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 483                 {
 484                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 485                 capi_addlasterror();
 486                 return NULL;
 487                 }
 488
 489         pubkey = OPENSSL_malloc(len);
 490
 491         if (!pubkey)
 492                 goto memerr;
 493
 494         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 495                 {
 496                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 497                 capi_addlasterror();
 498                 goto err;
 499                 }
 500
 501         bh = (BLOBHEADER *)pubkey;
 502         if (bh->bType != PUBLICKEYBLOB)
 503                 {
 504                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 505                 goto err;
 506                 }
 507         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 508                 {
 509                 RSAPUBKEY *rp;
 510                 DWORD rsa_modlen;
 511                 unsigned char *rsa_modulus;
 512                 rp = (RSAPUBKEY *)(bh + 1);
 513                 if (rp->magic != 0x31415352)
 514                         {
 515                         char magstr[10];
 516                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 517                         CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 518                         ERR_add_error_data(2, "magic=0x", magstr);
 519                         goto err;
 520                         }
 521                 rsa_modulus = (unsigned char *)(rp + 1);
 522                 rkey = RSA_new_method(eng);
 523                 if (!rkey)
 524                         goto memerr;
 525
 526                 rkey->e = BN_new();
 527                 rkey->n = BN_new();
 528
 529                 if (!rkey->e || !rkey->n)
 530                         goto memerr;
 531
 532                 if (!BN_set_word(rkey->e, rp->pubexp))
 533                         goto memerr;
 534
 535                 rsa_modlen = rp->bitlen / 8;
 536                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 537                         goto memerr;
 538
 539                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 540
 541                 if (!(ret = EVP_PKEY_new()))
 542                         goto memerr;
 543
 544                 EVP_PKEY_assign_RSA(ret, rkey);
 545                 rkey = NULL;
 546
 547                 }
 548         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 549                 {
 550                 DSSPUBKEY *dp;
 551                 DWORD dsa_plen;
 552                 unsigned char *btmp;
 553                 dp = (DSSPUBKEY *)(bh + 1);
 554                 if (dp->magic != 0x31535344)
 555                         {
 556                         char magstr[10];
 557                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 558                         CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 559                         ERR_add_error_data(2, "magic=0x", magstr);
 560                         goto err;
 561                         }
 562                 dsa_plen = dp->bitlen / 8;
 563                 btmp = (unsigned char *)(dp + 1);
 564                 dkey = DSA_new();
 565                 if (!dkey)
 566                         goto memerr;
 567                 dkey->p = BN_new();
 568                 dkey->q = BN_new();
 569                 dkey->g = BN_new();
 570                 dkey->pub_key = BN_new();
 571                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 572                         goto memerr;
 573                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 574                         goto memerr;
 575                 btmp += dsa_plen;
 576                 if (!lend_tobn(dkey->q, btmp, 20))
 577                         goto memerr;
 578                 btmp += 20;
 579                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 580                         goto memerr;
 581                 btmp += dsa_plen;
 582                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 583                         goto memerr;
 584                 btmp += dsa_plen;
 585
 586                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 587
 588                 if (!(ret = EVP_PKEY_new()))
 589                         goto memerr;
 590
 591                 EVP_PKEY_assign_DSA(ret, dkey);
 592                 dkey = NULL;
 593                 }
 594         else
 595                 {
 596                 char algstr[10];
 597                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 598                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 599                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 600                 goto err;
 601                 }
 602
 603         err:
 604         if (pubkey)
 605                 OPENSSL_free(pubkey);
 606         if (!ret)
 607                 {
 608                 if (rkey)
 609                         RSA_free(rkey);
 610                 if (dkey)
 611                         DSA_free(dkey);
 612                 if (key)
 613                         capi_free_key(key);
 614                 }
 615
 616         return ret;
 617
 618 memerr:
 619         CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
 620         goto err;
 621
 622         }
 623
 624 /* CryptoAPI RSA operations */
 625
 626 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 627                 unsigned char *to, RSA *rsa, int padding)
 628         {
 629         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 630         return -1;
 631         }
 632
 633 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 634              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 635         {
 636         ALG_ID alg;
 637         HCRYPTHASH hash;
 638         DWORD slen;
 639         unsigned int i;
 640         int ret = -1;
 641         CAPI_KEY *capi_key;
 642         CAPI_CTX *ctx;
 643
 644         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 645
 646         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 647
 648         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 649         if (!capi_key)
 650                 {
 651                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 652                 return -1;
 653                 }
 654 /* Convert the signature type to a CryptoAPI algorithm ID */
 655         switch(dtype) {
 656         case NID_sha1:
 657                 alg = CALG_SHA1;
 658                 break;
 659
 660         case NID_md5:
 661                 alg = CALG_MD5;
 662                 break;
 663
 664         case NID_md5_sha1:
 665                 alg = CALG_SSL3_SHAMD5;
 666                 break;
 667         default:
 668                 {
 669                 char algstr[10];
 670                 BIO_snprintf(algstr, 10, "%lx", dtype);
 671                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 672                 ERR_add_error_data(2, "NID=0x", algstr);
 673                 return -1;
 674                 }
 675         }
 676
 677
 678
 679 /* Create the hash object */
 680         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash)) {
 681                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 682                 capi_addlasterror();
 683                 return -1;
 684         }
 685 /* Set the hash value to the value passed */
 686
 687         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0)) {
 688                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 689                 capi_addlasterror();
 690                 goto err;
 691         }
 692
 693
 694 /* Finally sign it */
 695         slen = RSA_size(rsa);
 696         if(!CryptSignHash(hash, AT_KEYEXCHANGE, NULL, 0, sigret, &slen)) {
 697                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 698                 capi_addlasterror();
 699                 goto err;
 700         } else {
 701                 ret = 1;
 702                 /* Inplace byte reversal of signature */
 703                 for(i = 0; i < slen / 2; i++) {
 704                         unsigned char c;
 705                         c = sigret[i];
 706                         sigret[i] = sigret[slen - i - 1];
 707                         sigret[slen - i - 1] = c;
 708                 }
 709                 *siglen = slen;
 710         }
 711
 712
 713         /* Now cleanup */
 714
 715 err:
 716         CryptDestroyHash(hash);
 717
 718         return ret;
 719 }
 720
 721 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 722                 unsigned char *to, RSA *rsa, int padding)
 723 {
 724         int i;
 725         unsigned char *tmpbuf;
 726         CAPI_KEY *capi_key;
 727         CAPI_CTX *ctx;
 728         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 729
 730         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 731
 732
 733         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 734         if (!capi_key)
 735                 {
 736                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 737                 return -1;
 738                 }
 739
 740         if(padding != RSA_PKCS1_PADDING)
 741                 {
 742                 char errstr[10];
 743                 BIO_snprintf(errstr, 10, "%d", padding);
 744                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 745                 ERR_add_error_data(2, "padding=", errstr);
 746                 return -1;
 747                 }
 748
 749         /* Create temp reverse order version of input */
 750         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 751                 {
 752                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 753                 return -1;
 754                 }
 755         for(i = 0; i < flen; i++) tmpbuf[flen - i - 1] = from[i];
 756
 757         /* Finally decrypt it */
 758         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 759                 {
 760                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 761                 capi_addlasterror();
 762                 OPENSSL_free(tmpbuf);
 763                 return -1;
 764                 }
 765         else memcpy(to, tmpbuf, flen);
 766
 767         OPENSSL_free(tmpbuf);
 768
 769         return flen;
 770 }
 771
 772 static int capi_rsa_free(RSA *rsa)
 773         {
 774         CAPI_KEY *capi_key;
 775         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 776         capi_free_key(capi_key);
 777         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 778         return 1;
 779         }
 780
 781 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
 782         {
 783         BIO *out;
 784
 785         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
 786                 return;
 787         out = BIO_new_file(ctx->debug_file, "a+");
 788         BIO_vprintf(out, format, argptr);
 789         BIO_free(out);
 790         }
 791
 792 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
 793         {
 794         va_list args;
 795         va_start(args, format);
 796         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
 797         va_end(args);
 798         }
 799
 800 static void capi_addlasterror(void)
 801         {
 802         capi_adderror(GetLastError());
 803         }
 804
 805 static void capi_adderror(DWORD err)
 806         {
 807         char errstr[10];
 808         BIO_snprintf(errstr, 10, "%lX", err);
 809         ERR_add_error_data(2, "Error code= 0x", errstr);
 810         }
 811
 812 static char *wide_to_asc(LPWSTR wstr)
 813         {
 814         char *str;
 815         if (!wstr)
 816                 return NULL;
 817         str = OPENSSL_malloc(wcslen(wstr) + 1);
 818         if (!str)
 819                 {
 820                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
 821                 return NULL;
 822                 }
 823         sprintf(str, "%S", wstr);
 824         return str;
 825         }
 826
 827 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
 828         {
 829         LPSTR name;
 830         DWORD len, err;
 831         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
 832         if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len))
 833                 {
 834                 err = GetLastError();
 835                 if (err == ERROR_NO_MORE_ITEMS)
 836                         return 2;
 837                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
 838                 capi_adderror(err);
 839                 return 0;
 840                 }
 841         name = OPENSSL_malloc(len);
 842                 if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
 843                 {
 844                 err = GetLastError();
 845                 if (err == ERROR_NO_MORE_ITEMS)
 846                         return 2;
 847                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
 848                 capi_adderror(err);
 849                 return 0;
 850                 }
 851         *pname = name;
 852         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
 853
 854         return 1;
 855         }
 856
 857 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
 858         {
 859         DWORD idx, ptype;
 860         int ret;
 861         LPTSTR provname = NULL;
 862         CAPI_trace(ctx, "capi_list_providers\n");
 863         BIO_printf(out, "Available CSPs:\n");
 864         for(idx = 0; ; idx++)
 865                 {
 866                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
 867                 if (ret == 2)
 868                         break;
 869                 if (ret == 0)
 870                         break;
 871                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
 872                 OPENSSL_free(provname);
 873                 }
 874         return 1;
 875         }
 876
 877 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
 878         {
 879         int ret = 1;
 880         HCRYPTPROV hprov;
 881         DWORD err, idx, flags, buflen = 0, clen;
 882         LPSTR cname;
 883         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
 884         if (!CryptAcquireContext(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
 885                 {
 886                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
 887                 capi_addlasterror();
 888                 return 0;
 889                 }
 890         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
 891                 {
 892                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
 893                 capi_addlasterror();
 894                 return 0;
 895                 }
 896         CAPI_trace(ctx, "Got max container len %d\n", buflen);
 897         if (buflen == 0)
 898                 buflen = 1024;
 899         cname = OPENSSL_malloc(buflen);
 900         if (!cname)
 901                 {
 902                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
 903                 goto err;
 904                 }
 905
 906         for (idx = 0;;idx++)
 907                 {
 908                         clen = buflen;
 909                         cname[0] = 0;
 910
 911                         if (idx == 0)
 912                                 flags = CRYPT_FIRST;
 913                         else
 914                                 flags = 0;
 915                         if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
 916                                 {
 917                                 err = GetLastError();
 918                                 if (err == ERROR_NO_MORE_ITEMS)
 919                                         goto done;
 920                                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
 921                                 capi_adderror(err);
 922                                 goto err;
 923                                 }
 924                         CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
 925                         if (!cname[0] && (clen == buflen))
 926                                 {
 927                                 CAPI_trace(ctx, "Enumerate bug: using workaround\n");
 928                                 goto done;
 929                                 }
 930                         BIO_printf(out, "%d. %s\n", idx, cname);
 931                 }
 932         err:
 933
 934         ret = 0;
 935
 936         done:
 937         if (cname)
 938                 OPENSSL_free(cname);
 939         CryptReleaseContext(hprov, 0);
 940
 941         return ret;
 942         }
 943
 944 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
 945         {
 946         DWORD len;
 947         CRYPT_KEY_PROV_INFO *pinfo;
 948
 949         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
 950                 return NULL;
 951         pinfo = OPENSSL_malloc(len);
 952         if (!pinfo)
 953                 {
 954                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
 955                 return NULL;
 956                 }
 957         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
 958                 {
 959                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
 960                 capi_addlasterror();
 961                 OPENSSL_free(pinfo);
 962                 return NULL;
 963                 }
 964         return pinfo;
 965         }
 966
 967 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
 968         {
 969         char *provname = NULL, *contname = NULL;
 970         if (!pinfo)
 971                 {
 972                 BIO_printf(out, "  No Private Key\n");
 973                 return;
 974                 }
 975         provname = wide_to_asc(pinfo->pwszProvName);
 976         contname = wide_to_asc(pinfo->pwszContainerName);
 977         if (!provname || !contname)
 978                 goto err;
 979
 980         BIO_printf(out, "  Private Key Info:\n");
 981         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
 982         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
 983         err:
 984         if (provname)
 985                 OPENSSL_free(provname);
 986         if (contname)
 987                 OPENSSL_free(contname);
 988         }
 989
 990 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
 991         {
 992         LPWSTR wfname;
 993         DWORD dlen;
 994
 995         CAPI_trace(ctx, "capi_cert_get_fname\n");
 996         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
 997                 return NULL;
 998         wfname = OPENSSL_malloc(dlen);
 999         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1000                 {
1001                 char *fname = wide_to_asc(wfname);
1002                 OPENSSL_free(wfname);
1003                 return fname;
1004                 }
1005         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1006         capi_addlasterror();
1007
1008         OPENSSL_free(wfname);
1009         return NULL;
1010         }
1011
1012
1013 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1014         {
1015         X509 *x;
1016         unsigned char *p;
1017         unsigned long flags = ctx->dump_flags;
1018         if (flags & CAPI_DMP_FNAME)
1019                 {
1020                 char *fname;
1021                 fname = capi_cert_get_fname(ctx, cert);
1022                 if (fname)
1023                         {
1024                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1025                         OPENSSL_free(fname);
1026                         }
1027                 else
1028                         BIO_printf(out, "  <No Friendly Name>\n");
1029                 }
1030
1031         p = cert->pbCertEncoded;
1032         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1033         if (!x)
1034                 BIO_printf(out, "  <Can't parse certificate>\n");
1035         if (flags & CAPI_DMP_SUMMARY)
1036                 {
1037                 BIO_printf(out, "  Subject: ");
1038                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1039                 BIO_printf(out, "\n  Issuer: ");
1040                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1041                 BIO_printf(out, "\n");
1042                 }
1043         if (flags & CAPI_DMP_FULL)
1044                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1045
1046         if (flags & CAPI_DMP_PKEYINFO)
1047                 {
1048                 CRYPT_KEY_PROV_INFO *pinfo;
1049                 pinfo = capi_get_prov_info(ctx, cert);
1050                 capi_dump_prov_info(ctx, out, pinfo);
1051                 if (pinfo)
1052                         OPENSSL_free(pinfo);
1053                 }
1054
1055         if (flags & CAPI_DMP_PEM)
1056                 PEM_write_bio_X509(out, x);
1057         X509_free(x);
1058         }
1059
1060 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1061         {
1062         HCERTSTORE hstore;
1063
1064         if (!storename)
1065                 storename = ctx->storename;
1066         if (!storename)
1067                 storename = "MY";
1068         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1069
1070         hstore = CertOpenSystemStore(0, storename);
1071         if (!hstore)
1072                 {
1073                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1074                 capi_addlasterror();
1075                 }
1076         return hstore;
1077         }
1078
1079 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1080         {
1081         char *storename;
1082         int idx;
1083         int ret = 1;
1084         HCERTSTORE hstore;
1085         PCCERT_CONTEXT cert = NULL;
1086
1087         storename = ctx->storename;
1088         if (!storename)
1089                 storename = "MY";
1090         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1091
1092         hstore = capi_open_store(ctx, storename);
1093         if (!hstore)
1094                 return 0;
1095         if (id)
1096                 {
1097                 cert = capi_find_cert(ctx, id, hstore);
1098                 if (!cert)
1099                         {
1100                         ret = 0;
1101                         goto err;
1102                         }
1103                 capi_dump_cert(ctx, out, cert);
1104                 CertFreeCertificateContext(cert);
1105                 }
1106         else
1107                 {
1108                 for(idx = 0;;idx++)
1109                         {
1110                         LPWSTR fname = NULL;
1111                         cert = CertEnumCertificatesInStore(hstore, cert);
1112                         if (!cert)
1113                                 break;
1114                         BIO_printf(out, "Certificate %d\n", idx);
1115                         capi_dump_cert(ctx, out, cert);
1116                         }
1117                 }
1118         err:
1119         CertCloseStore(hstore, 0);
1120         return ret;
1121         }
1122
1123 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1124         {
1125         PCCERT_CONTEXT cert = NULL;
1126         char *fname = NULL;
1127         int match;
1128         switch(ctx->lookup_method)
1129                 {
1130                 case CAPI_LU_SUBSTR:
1131                         return CertFindCertificateInStore(hstore, X509_ASN_ENCODING, 0,
1132                                                                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1133                 case CAPI_LU_FNAME:
1134                         for(;;)
1135                                 {
1136                                 cert = CertEnumCertificatesInStore(hstore, cert);
1137                                 if (!cert)
1138                                         return NULL;
1139                                 fname = capi_cert_get_fname(ctx, cert);
1140                                 if (fname)
1141                                         {
1142                                         if (strcmp(fname, id))
1143                                                 match = 0;
1144                                         else
1145                                                 match = 1;
1146                                         OPENSSL_free(fname);
1147                                         if (match)
1148                                                 return cert;
1149                                         }
1150                                 }
1151                 default:
1152                         return NULL;
1153                 }
1154         }
1155
1156 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
1157         {
1158         CAPI_KEY *key;
1159         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1160         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1161                                                                                                                         contname, provname, ptype);
1162         if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, 0))
1163                 {
1164                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1165                 capi_addlasterror();
1166                 goto err;
1167                 }
1168         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1169                 {
1170                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1171                 capi_addlasterror();
1172                 CryptReleaseContext(key->hprov, 0);
1173                 goto err;
1174                 }
1175         return key;
1176
1177         err:
1178         OPENSSL_free(key);
1179         return NULL;
1180         }
1181
1182 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1183         {
1184         CAPI_KEY *key;
1185         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1186         char *provname = NULL, *contname = NULL;
1187         pinfo = capi_get_prov_info(ctx, cert);
1188         if (!pinfo)
1189                 goto err;
1190         provname = wide_to_asc(pinfo->pwszProvName);
1191         contname = wide_to_asc(pinfo->pwszContainerName);
1192         if (!provname || !contname)
1193                 return 0;
1194
1195         key = capi_get_key(ctx, contname, provname, pinfo->dwProvType, pinfo->dwKeySpec);
1196
1197         err:
1198         if (pinfo)
1199                 OPENSSL_free(pinfo);
1200         if (provname)
1201                 OPENSSL_free(provname);
1202         if (contname)
1203                 OPENSSL_free(contname);
1204         return key;
1205         }
1206
1207 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1208         {
1209         PCCERT_CONTEXT cert;
1210         HCERTSTORE hstore;
1211         CAPI_KEY *key = NULL;
1212         switch (ctx->lookup_method)
1213                 {
1214                 case CAPI_LU_SUBSTR:
1215                 case CAPI_LU_FNAME:
1216                 hstore = capi_open_store(ctx, NULL);
1217                 if (!hstore)
1218                         return NULL;
1219                 cert = capi_find_cert(ctx, id, hstore);
1220                 if (cert)
1221                         {
1222                         key = capi_get_cert_key(ctx, cert);
1223                         CertFreeCertificateContext(cert);
1224                         }
1225                 CertCloseStore(hstore, 0);
1226                 break;
1227
1228                 case CAPI_LU_CONTNAME:
1229                 key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype, ctx->keytype);
1230                 break;
1231                 }
1232
1233         return key;
1234         }
1235
1236 void capi_free_key(CAPI_KEY *key)
1237         {
1238         if (!key)
1239                 return;
1240         CryptDestroyKey(key->key);
1241         CryptReleaseContext(key->hprov, 0);
1242         OPENSSL_free(key);
1243         }
1244
1245
1246 /* Initialize a CAPI_CTX structure */
1247
1248 static CAPI_CTX *capi_ctx_new()
1249         {
1250         CAPI_CTX *ctx;
1251         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1252         if (!ctx)
1253                 {
1254                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1255                 return NULL;
1256                 }
1257         ctx->cspname = NULL;
1258         ctx->csptype = PROV_RSA_FULL;
1259         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1260         ctx->keytype = AT_KEYEXCHANGE;
1261         ctx->storename = NULL;
1262         ctx->lookup_method = CAPI_LU_SUBSTR;
1263         ctx->debug_level = 0;
1264         ctx->debug_file = NULL;
1265         return ctx;
1266         }
1267
1268 static void capi_ctx_free(CAPI_CTX *ctx)
1269         {
1270         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1271         if (!ctx)
1272                 return;
1273         if (ctx->cspname)
1274                 OPENSSL_free(ctx->cspname);
1275         if (ctx->debug_file)
1276                 OPENSSL_free(ctx->debug_file);
1277         if (ctx->storename)
1278                 OPENSSL_free(ctx->storename);
1279         OPENSSL_free(ctx);
1280         }
1281
1282 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1283         {
1284         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1285         if (check)
1286                 {
1287                 HCRYPTPROV hprov;
1288                 if (!CryptAcquireContext(&hprov, NULL, pname, type, CRYPT_VERIFYCONTEXT))
1289                         {
1290                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1291                         capi_addlasterror();
1292                         return 0;
1293                         }
1294                 CryptReleaseContext(hprov, 0);
1295                 }
1296         ctx->cspname = BUF_strdup(pname);
1297         ctx->csptype = type;
1298         return 1;
1299         }
1300
1301 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1302         {
1303         LPSTR pname;
1304         DWORD type;
1305         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1306                 return 0;
1307         return capi_ctx_set_provname(ctx, pname, type, 0);
1308         }
1309
1310 #endif
1311 #endif