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