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_init_function(e, capi_init)
 531                 || !ENGINE_set_finish_function(e, capi_finish)
 532                 || !ENGINE_set_destroy_function(e, capi_destroy)
 533                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 534                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 535                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 536                 || !ENGINE_set_load_ssl_client_cert_function(e,
 537                                                 capi_load_ssl_client_cert)
 538                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 539                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 540                         return 0;
 541         ERR_load_CAPI_strings();
 542
 543         return 1;
 544
 545         }
 546
 547 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 548 static int bind_helper(ENGINE *e, const char *id)
 549         {
 550         if(id && (strcmp(id, engine_capi_id) != 0))
 551                 return 0;
 552         if(!bind_capi(e))
 553                 return 0;
 554         return 1;
 555         }
 556 IMPLEMENT_DYNAMIC_CHECK_FN()
 557 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 558 #else
 559 static ENGINE *engine_capi(void)
 560         {
 561         ENGINE *ret = ENGINE_new();
 562         if(!ret)
 563                 return NULL;
 564         if(!bind_capi(ret))
 565                 {
 566                 ENGINE_free(ret);
 567                 return NULL;
 568                 }
 569         return ret;
 570         }
 571
 572 void ENGINE_load_capi(void)
 573         {
 574         /* Copied from eng_[openssl|dyn].c */
 575         ENGINE *toadd = engine_capi();
 576         if(!toadd) return;
 577         ENGINE_add(toadd);
 578         ENGINE_free(toadd);
 579         ERR_clear_error();
 580         }
 581 #endif
 582
 583
 584 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 585         {
 586         int i;
 587         /* Reverse buffer in place: since this is a keyblob structure
 588          * that will be freed up after conversion anyway it doesn't
 589          * matter if we change it.
 590          */
 591         for(i = 0; i < binlen / 2; i++)
 592                 {
 593                 unsigned char c;
 594                 c = bin[i];
 595                 bin[i] = bin[binlen - i - 1];
 596                 bin[binlen - i - 1] = c;
 597                 }
 598
 599         if (!BN_bin2bn(bin, binlen, bn))
 600                 return 0;
 601         return 1;
 602         }
 603
 604 /* Given a CAPI_KEY get an EVP_PKEY structure */
 605
 606 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 607         {
 608         unsigned char *pubkey = NULL;
 609         DWORD len;
 610         BLOBHEADER *bh;
 611         RSA *rkey = NULL;
 612         DSA *dkey = NULL;
 613         EVP_PKEY *ret = NULL;
 614         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 615                 {
 616                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 617                 capi_addlasterror();
 618                 return NULL;
 619                 }
 620
 621         pubkey = OPENSSL_malloc(len);
 622
 623         if (!pubkey)
 624                 goto memerr;
 625
 626         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 627                 {
 628                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 629                 capi_addlasterror();
 630                 goto err;
 631                 }
 632
 633         bh = (BLOBHEADER *)pubkey;
 634         if (bh->bType != PUBLICKEYBLOB)
 635                 {
 636                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 637                 goto err;
 638                 }
 639         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 640                 {
 641                 RSAPUBKEY *rp;
 642                 DWORD rsa_modlen;
 643                 unsigned char *rsa_modulus;
 644                 rp = (RSAPUBKEY *)(bh + 1);
 645                 if (rp->magic != 0x31415352)
 646                         {
 647                         char magstr[10];
 648                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 649                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 650                         ERR_add_error_data(2, "magic=0x", magstr);
 651                         goto err;
 652                         }
 653                 rsa_modulus = (unsigned char *)(rp + 1);
 654                 rkey = RSA_new_method(eng);
 655                 if (!rkey)
 656                         goto memerr;
 657
 658                 rkey->e = BN_new();
 659                 rkey->n = BN_new();
 660
 661                 if (!rkey->e || !rkey->n)
 662                         goto memerr;
 663
 664                 if (!BN_set_word(rkey->e, rp->pubexp))
 665                         goto memerr;
 666
 667                 rsa_modlen = rp->bitlen / 8;
 668                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 669                         goto memerr;
 670
 671                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 672
 673                 if (!(ret = EVP_PKEY_new()))
 674                         goto memerr;
 675
 676                 EVP_PKEY_assign_RSA(ret, rkey);
 677                 rkey = NULL;
 678
 679                 }
 680         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 681                 {
 682                 DSSPUBKEY *dp;
 683                 DWORD dsa_plen;
 684                 unsigned char *btmp;
 685                 dp = (DSSPUBKEY *)(bh + 1);
 686                 if (dp->magic != 0x31535344)
 687                         {
 688                         char magstr[10];
 689                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 690                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 691                         ERR_add_error_data(2, "magic=0x", magstr);
 692                         goto err;
 693                         }
 694                 dsa_plen = dp->bitlen / 8;
 695                 btmp = (unsigned char *)(dp + 1);
 696                 dkey = DSA_new_method(eng);
 697                 if (!dkey)
 698                         goto memerr;
 699                 dkey->p = BN_new();
 700                 dkey->q = BN_new();
 701                 dkey->g = BN_new();
 702                 dkey->pub_key = BN_new();
 703                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 704                         goto memerr;
 705                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 706                         goto memerr;
 707                 btmp += dsa_plen;
 708                 if (!lend_tobn(dkey->q, btmp, 20))
 709                         goto memerr;
 710                 btmp += 20;
 711                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 712                         goto memerr;
 713                 btmp += dsa_plen;
 714                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 715                         goto memerr;
 716                 btmp += dsa_plen;
 717
 718                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 719
 720                 if (!(ret = EVP_PKEY_new()))
 721                         goto memerr;
 722
 723                 EVP_PKEY_assign_DSA(ret, dkey);
 724                 dkey = NULL;
 725                 }
 726         else
 727                 {
 728                 char algstr[10];
 729                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 730                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 731                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 732                 goto err;
 733                 }
 734
 735
 736         err:
 737         if (pubkey)
 738                 OPENSSL_free(pubkey);
 739         if (!ret)
 740                 {
 741                 if (rkey)
 742                         RSA_free(rkey);
 743                 if (dkey)
 744                         DSA_free(dkey);
 745                 }
 746
 747         return ret;
 748
 749 memerr:
 750         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 751         goto err;
 752
 753         }
 754
 755 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 756         UI_METHOD *ui_method, void *callback_data)
 757         {
 758         CAPI_CTX *ctx;
 759         CAPI_KEY *key;
 760         EVP_PKEY *ret;
 761         ctx = ENGINE_get_ex_data(eng, capi_idx);
 762
 763         if (!ctx)
 764                 {
 765                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 766                 return NULL;
 767                 }
 768
 769         key = capi_find_key(ctx, key_id);
 770
 771         if (!key)
 772                 return NULL;
 773
 774         ret = capi_get_pkey(eng, key);
 775
 776         if (!ret)
 777                 capi_free_key(key);
 778         return ret;
 779
 780         }
 781
 782 /* CryptoAPI RSA operations */
 783
 784 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 785                 unsigned char *to, RSA *rsa, int padding)
 786         {
 787         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 788         return -1;
 789         }
 790
 791 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 792              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 793         {
 794         ALG_ID alg;
 795         HCRYPTHASH hash;
 796         DWORD slen;
 797         unsigned int i;
 798         int ret = -1;
 799         CAPI_KEY *capi_key;
 800         CAPI_CTX *ctx;
 801
 802         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 803
 804         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 805
 806         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 807         if (!capi_key)
 808                 {
 809                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 810                 return -1;
 811                 }
 812 /* Convert the signature type to a CryptoAPI algorithm ID */
 813         switch(dtype)
 814                 {
 815         case NID_sha1:
 816                 alg = CALG_SHA1;
 817                 break;
 818
 819         case NID_md5:
 820                 alg = CALG_MD5;
 821                 break;
 822
 823         case NID_md5_sha1:
 824                 alg = CALG_SSL3_SHAMD5;
 825                 break;
 826         default:
 827                 {
 828                 char algstr[10];
 829                 BIO_snprintf(algstr, 10, "%lx", dtype);
 830                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 831                 ERR_add_error_data(2, "NID=0x", algstr);
 832                 return -1;
 833                 }
 834         }
 835
 836
 837
 838 /* Create the hash object */
 839         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 840                 {
 841                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 842                 capi_addlasterror();
 843                 return -1;
 844                 }
 845 /* Set the hash value to the value passed */
 846
 847         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 848                 {
 849                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 850                 capi_addlasterror();
 851                 goto err;
 852                 }
 853
 854
 855 /* Finally sign it */
 856         slen = RSA_size(rsa);
 857         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 858                 {
 859                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 860                 capi_addlasterror();
 861                 goto err;
 862                 }
 863         else
 864                 {
 865                 ret = 1;
 866                 /* Inplace byte reversal of signature */
 867                 for(i = 0; i < slen / 2; i++)
 868                         {
 869                         unsigned char c;
 870                         c = sigret[i];
 871                         sigret[i] = sigret[slen - i - 1];
 872                         sigret[slen - i - 1] = c;
 873                         }
 874                 *siglen = slen;
 875                 }
 876
 877         /* Now cleanup */
 878
 879 err:
 880         CryptDestroyHash(hash);
 881
 882         return ret;
 883         }
 884
 885 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 886                 unsigned char *to, RSA *rsa, int padding)
 887         {
 888         int i;
 889         unsigned char *tmpbuf;
 890         CAPI_KEY *capi_key;
 891         CAPI_CTX *ctx;
 892         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 893
 894         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 895
 896
 897         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 898         if (!capi_key)
 899                 {
 900                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 901                 return -1;
 902                 }
 903
 904         if(padding != RSA_PKCS1_PADDING)
 905                 {
 906                 char errstr[10];
 907                 BIO_snprintf(errstr, 10, "%d", padding);
 908                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 909                 ERR_add_error_data(2, "padding=", errstr);
 910                 return -1;
 911                 }
 912
 913         /* Create temp reverse order version of input */
 914         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 915                 {
 916                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 917                 return -1;
 918                 }
 919         for(i = 0; i < flen; i++)
 920                 tmpbuf[flen - i - 1] = from[i];
 921
 922         /* Finally decrypt it */
 923         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 924                 {
 925                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 926                 capi_addlasterror();
 927                 OPENSSL_free(tmpbuf);
 928                 return -1;
 929                 }
 930         else memcpy(to, tmpbuf, flen);
 931
 932         OPENSSL_free(tmpbuf);
 933
 934         return flen;
 935         }
 936
 937 static int capi_rsa_free(RSA *rsa)
 938         {
 939         CAPI_KEY *capi_key;
 940         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 941         capi_free_key(capi_key);
 942         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 943         return 1;
 944         }
 945
 946 /* CryptoAPI DSA operations */
 947
 948 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 949                                                                 DSA *dsa)
 950         {
 951         HCRYPTHASH hash;
 952         DWORD slen;
 953         DSA_SIG *ret = NULL;
 954         CAPI_KEY *capi_key;
 955         CAPI_CTX *ctx;
 956         unsigned char csigbuf[40];
 957
 958         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 959
 960         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 961
 962         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 963
 964         if (!capi_key)
 965                 {
 966                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 967                 return NULL;
 968                 }
 969
 970         if (dlen != 20)
 971                 {
 972                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 973                 return NULL;
 974                 }
 975
 976         /* Create the hash object */
 977         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
 978                 {
 979                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 980                 capi_addlasterror();
 981                 return NULL;
 982                 }
 983
 984         /* Set the hash value to the value passed */
 985         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
 986                 {
 987                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 988                 capi_addlasterror();
 989                 goto err;
 990                 }
 991
 992
 993         /* Finally sign it */
 994         slen = sizeof(csigbuf);
 995         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
 996                 {
 997                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 998                 capi_addlasterror();
 999                 goto err;
1000                 }
1001         else
1002                 {
1003                 ret = DSA_SIG_new();
1004                 if (!ret)
1005                         goto err;
1006                 ret->r = BN_new();
1007                 ret->s = BN_new();
1008                 if (!ret->r || !ret->s)
1009                         goto err;
1010                 if (!lend_tobn(ret->r, csigbuf, 20)
1011                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1012                         {
1013                         DSA_SIG_free(ret);
1014                         ret = NULL;
1015                         goto err;
1016                         }
1017                 }
1018
1019         /* Now cleanup */
1020
1021 err:
1022         OPENSSL_cleanse(csigbuf, 40);
1023         CryptDestroyHash(hash);
1024         return ret;
1025         }
1026
1027 static int capi_dsa_free(DSA *dsa)
1028         {
1029         CAPI_KEY *capi_key;
1030         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1031         capi_free_key(capi_key);
1032         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1033         return 1;
1034         }
1035
1036 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1037         {
1038         BIO *out;
1039
1040         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1041                 return;
1042         out = BIO_new_file(ctx->debug_file, "a+");
1043         BIO_vprintf(out, format, argptr);
1044         BIO_free(out);
1045         }
1046
1047 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1048         {
1049         va_list args;
1050         va_start(args, format);
1051         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1052         va_end(args);
1053         }
1054
1055 static void capi_addlasterror(void)
1056         {
1057         capi_adderror(GetLastError());
1058         }
1059
1060 static void capi_adderror(DWORD err)
1061         {
1062         char errstr[10];
1063         BIO_snprintf(errstr, 10, "%lX", err);
1064         ERR_add_error_data(2, "Error code= 0x", errstr);
1065         }
1066
1067 static char *wide_to_asc(LPCWSTR wstr)
1068         {
1069         char *str;
1070         int len_0,sz;
1071
1072         if (!wstr)
1073                 return NULL;
1074         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1075         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1076         if (!sz)
1077                 {
1078                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1079                 return NULL;
1080                 }
1081         str = OPENSSL_malloc(sz);
1082         if (!str)
1083                 {
1084                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1085                 return NULL;
1086                 }
1087         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1088                 {
1089                 OPENSSL_free(str);
1090                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1091                 return NULL;
1092                 }
1093         return str;
1094         }
1095
1096 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1097         {
1098         DWORD len, err;
1099         LPTSTR name;
1100         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1101         if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len))
1102                 {
1103                 err = GetLastError();
1104                 if (err == ERROR_NO_MORE_ITEMS)
1105                         return 2;
1106                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1107                 capi_adderror(err);
1108                 return 0;
1109                 }
1110         if (sizeof(TCHAR) != sizeof(char))
1111                 name = alloca(len);
1112         else
1113                 name = OPENSSL_malloc(len);
1114         if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
1115                 {
1116                 err = GetLastError();
1117                 if (err == ERROR_NO_MORE_ITEMS)
1118                         return 2;
1119                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1120                 capi_adderror(err);
1121                 return 0;
1122                 }
1123         if (sizeof(TCHAR) != sizeof(char))
1124                 *pname = wide_to_asc((WCHAR *)name);
1125         else
1126                 *pname = (char *)name;
1127         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", *pname, *ptype);
1128
1129         return 1;
1130         }
1131
1132 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1133         {
1134         DWORD idx, ptype;
1135         int ret;
1136         LPSTR provname = NULL;
1137         CAPI_trace(ctx, "capi_list_providers\n");
1138         BIO_printf(out, "Available CSPs:\n");
1139         for(idx = 0; ; idx++)
1140                 {
1141                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1142                 if (ret == 2)
1143                         break;
1144                 if (ret == 0)
1145                         break;
1146                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1147                 OPENSSL_free(provname);
1148                 }
1149         return 1;
1150         }
1151
1152 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1153         {
1154         int ret = 1;
1155         HCRYPTPROV hprov;
1156         DWORD err, idx, flags, buflen = 0, clen;
1157         LPSTR cname;
1158         LPTSTR cspname = NULL;
1159
1160         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1161         if (sizeof(TCHAR)!=sizeof(char))
1162                 {
1163                 if ((clen=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)))
1164                         {
1165                         cspname = alloca(clen*sizeof(WCHAR));
1166                         MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,(WCHAR *)cspname,clen);
1167                         }
1168                 }
1169         else
1170                 cspname = (TCHAR *)ctx->cspname;
1171         if (!cspname || !CryptAcquireContext(&hprov, NULL, cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1172                 {
1173                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1174                 capi_addlasterror();
1175                 return 0;
1176                 }
1177         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1178                 {
1179                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1180                 capi_addlasterror();
1181                 return 0;
1182                 }
1183         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1184         if (buflen == 0)
1185                 buflen = 1024;
1186         cname = OPENSSL_malloc(buflen);
1187         if (!cname)
1188                 {
1189                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1190                 goto err;
1191                 }
1192
1193         for (idx = 0;;idx++)
1194                 {
1195                 clen = buflen;
1196                 cname[0] = 0;
1197
1198                 if (idx == 0)
1199                         flags = CRYPT_FIRST;
1200                 else
1201                         flags = 0;
1202                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, (BYTE *)cname, &clen, flags))
1203                         {
1204                         err = GetLastError();
1205                         if (err == ERROR_NO_MORE_ITEMS)
1206                                 goto done;
1207                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1208                         capi_adderror(err);
1209                         goto err;
1210                         }
1211                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1212                 if (!cname[0] && (clen == buflen))
1213                         {
1214                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1215                         goto done;
1216                         }
1217                 BIO_printf(out, "%d. %s\n", idx, cname);
1218                 }
1219         err:
1220
1221         ret = 0;
1222
1223         done:
1224         if (cname)
1225                 OPENSSL_free(cname);
1226         CryptReleaseContext(hprov, 0);
1227
1228         return ret;
1229         }
1230
1231 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1232         {
1233         DWORD len;
1234         CRYPT_KEY_PROV_INFO *pinfo;
1235
1236         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1237                 return NULL;
1238         pinfo = OPENSSL_malloc(len);
1239         if (!pinfo)
1240                 {
1241                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1242                 return NULL;
1243                 }
1244         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1245                 {
1246                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1247                 capi_addlasterror();
1248                 OPENSSL_free(pinfo);
1249                 return NULL;
1250                 }
1251         return pinfo;
1252         }
1253
1254 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1255         {
1256         char *provname = NULL, *contname = NULL;
1257         if (!pinfo)
1258                 {
1259                 BIO_printf(out, "  No Private Key\n");
1260                 return;
1261                 }
1262         provname = wide_to_asc(pinfo->pwszProvName);
1263         contname = wide_to_asc(pinfo->pwszContainerName);
1264         if (!provname || !contname)
1265                 goto err;
1266
1267         BIO_printf(out, "  Private Key Info:\n");
1268         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1269         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1270         err:
1271         if (provname)
1272                 OPENSSL_free(provname);
1273         if (contname)
1274                 OPENSSL_free(contname);
1275         }
1276
1277 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1278         {
1279         LPWSTR wfname;
1280         DWORD dlen;
1281
1282         CAPI_trace(ctx, "capi_cert_get_fname\n");
1283         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1284                 return NULL;
1285         wfname = OPENSSL_malloc(dlen);
1286         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1287                 {
1288                 char *fname = wide_to_asc(wfname);
1289                 OPENSSL_free(wfname);
1290                 return fname;
1291                 }
1292         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1293         capi_addlasterror();
1294
1295         OPENSSL_free(wfname);
1296         return NULL;
1297         }
1298
1299
1300 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1301         {
1302         X509 *x;
1303         unsigned char *p;
1304         unsigned long flags = ctx->dump_flags;
1305         if (flags & CAPI_DMP_FNAME)
1306                 {
1307                 char *fname;
1308                 fname = capi_cert_get_fname(ctx, cert);
1309                 if (fname)
1310                         {
1311                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1312                         OPENSSL_free(fname);
1313                         }
1314                 else
1315                         BIO_printf(out, "  <No Friendly Name>\n");
1316                 }
1317
1318         p = cert->pbCertEncoded;
1319         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1320         if (!x)
1321                 BIO_printf(out, "  <Can't parse certificate>\n");
1322         if (flags & CAPI_DMP_SUMMARY)
1323                 {
1324                 BIO_printf(out, "  Subject: ");
1325                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1326                 BIO_printf(out, "\n  Issuer: ");
1327                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1328                 BIO_printf(out, "\n");
1329                 }
1330         if (flags & CAPI_DMP_FULL)
1331                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1332
1333         if (flags & CAPI_DMP_PKEYINFO)
1334                 {
1335                 CRYPT_KEY_PROV_INFO *pinfo;
1336                 pinfo = capi_get_prov_info(ctx, cert);
1337                 capi_dump_prov_info(ctx, out, pinfo);
1338                 if (pinfo)
1339                         OPENSSL_free(pinfo);
1340                 }
1341
1342         if (flags & CAPI_DMP_PEM)
1343                 PEM_write_bio_X509(out, x);
1344         X509_free(x);
1345         }
1346
1347 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1348         {
1349         HCERTSTORE hstore;
1350
1351         if (!storename)
1352                 storename = ctx->storename;
1353         if (!storename)
1354                 storename = "MY";
1355         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1356
1357         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1358                                 ctx->store_flags, storename);
1359         if (!hstore)
1360                 {
1361                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1362                 capi_addlasterror();
1363                 }
1364         return hstore;
1365         }
1366
1367 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1368         {
1369         char *storename;
1370         int idx;
1371         int ret = 1;
1372         HCERTSTORE hstore;
1373         PCCERT_CONTEXT cert = NULL;
1374
1375         storename = ctx->storename;
1376         if (!storename)
1377                 storename = "MY";
1378         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1379
1380         hstore = capi_open_store(ctx, storename);
1381         if (!hstore)
1382                 return 0;
1383         if (id)
1384                 {
1385                 cert = capi_find_cert(ctx, id, hstore);
1386                 if (!cert)
1387                         {
1388                         ret = 0;
1389                         goto err;
1390                         }
1391                 capi_dump_cert(ctx, out, cert);
1392                 CertFreeCertificateContext(cert);
1393                 }
1394         else
1395                 {
1396                 for(idx = 0;;idx++)
1397                         {
1398                         cert = CertEnumCertificatesInStore(hstore, cert);
1399                         if (!cert)
1400                                 break;
1401                         BIO_printf(out, "Certificate %d\n", idx);
1402                         capi_dump_cert(ctx, out, cert);
1403                         }
1404                 }
1405         err:
1406         CertCloseStore(hstore, 0);
1407         return ret;
1408         }
1409
1410 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1411         {
1412         PCCERT_CONTEXT cert = NULL;
1413         char *fname = NULL;
1414         int match;
1415         switch(ctx->lookup_method)
1416                 {
1417                 case CAPI_LU_SUBSTR:
1418                         return CertFindCertificateInStore(hstore,
1419                                         X509_ASN_ENCODING, 0,
1420                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1421                 case CAPI_LU_FNAME:
1422                         for(;;)
1423                                 {
1424                                 cert = CertEnumCertificatesInStore(hstore, cert);
1425                                 if (!cert)
1426                                         return NULL;
1427                                 fname = capi_cert_get_fname(ctx, cert);
1428                                 if (fname)
1429                                         {
1430                                         if (strcmp(fname, id))
1431                                                 match = 0;
1432                                         else
1433                                                 match = 1;
1434                                         OPENSSL_free(fname);
1435                                         if (match)
1436                                                 return cert;
1437                                         }
1438                                 }
1439                 default:
1440                         return NULL;
1441                 }
1442         }
1443
1444 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const TCHAR *contname, TCHAR *provname, DWORD ptype, DWORD keyspec)
1445         {
1446         CAPI_KEY *key;
1447         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1448         if (sizeof(TCHAR)==sizeof(char))
1449                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1450                                                 contname, provname, ptype);
1451         else if (ctx && ctx->debug_level>=CAPI_DBG_TRACE && ctx->debug_file)
1452                 {
1453                 /* above 'if' is optimization to minimize malloc-ations */
1454                 char *_contname = wide_to_asc((WCHAR *)contname);
1455                 char *_provname = wide_to_asc((WCHAR *)provname);
1456
1457                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1458                                                 _contname, _provname, ptype);
1459                 if (_provname) OPENSSL_free(_provname);
1460                 if (_contname) OPENSSL_free(_contname);
1461                 }
1462         if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, 0))
1463                 {
1464                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1465                 capi_addlasterror();
1466                 goto err;
1467                 }
1468         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1469                 {
1470                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1471                 capi_addlasterror();
1472                 CryptReleaseContext(key->hprov, 0);
1473                 goto err;
1474                 }
1475         key->keyspec = keyspec;
1476         key->pcert = NULL;
1477         return key;
1478
1479         err:
1480         OPENSSL_free(key);
1481         return NULL;
1482         }
1483
1484 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1485         {
1486         CAPI_KEY *key = NULL;
1487         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1488         char *provname = NULL, *contname = NULL;
1489         pinfo = capi_get_prov_info(ctx, cert);
1490         if (!pinfo)
1491                 goto err;
1492         if (sizeof(TCHAR) != sizeof(char))
1493                 key = capi_get_key(ctx, (TCHAR *)pinfo->pwszContainerName,
1494                                 (TCHAR *)pinfo->pwszProvName,
1495                                 pinfo->dwProvType, pinfo->dwKeySpec);
1496         else
1497                 {
1498                 provname = wide_to_asc(pinfo->pwszProvName);
1499                 contname = wide_to_asc(pinfo->pwszContainerName);
1500                 if (!provname || !contname)
1501                         goto err;
1502                 key = capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
1503                                 pinfo->dwProvType, pinfo->dwKeySpec);
1504                 }
1505
1506         err:
1507         if (pinfo)
1508                 OPENSSL_free(pinfo);
1509         if (provname)
1510                 OPENSSL_free(provname);
1511         if (contname)
1512                 OPENSSL_free(contname);
1513         return key;
1514         }
1515
1516 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1517         {
1518         PCCERT_CONTEXT cert;
1519         HCERTSTORE hstore;
1520         CAPI_KEY *key = NULL;
1521         switch (ctx->lookup_method)
1522                 {
1523                 case CAPI_LU_SUBSTR:
1524                 case CAPI_LU_FNAME:
1525                 hstore = capi_open_store(ctx, NULL);
1526                 if (!hstore)
1527                         return NULL;
1528                 cert = capi_find_cert(ctx, id, hstore);
1529                 if (cert)
1530                         {
1531                         key = capi_get_cert_key(ctx, cert);
1532                         CertFreeCertificateContext(cert);
1533                         }
1534                 CertCloseStore(hstore, 0);
1535                 break;
1536
1537                 case CAPI_LU_CONTNAME:
1538                 if (sizeof(TCHAR)!=sizeof(char))
1539                         {
1540                         WCHAR *contname, *provname;
1541                         DWORD len;
1542
1543                         if ((len=MultiByteToWideChar(CP_ACP,0,id,-1,NULL,0)) &&
1544                             (contname=alloca(len*sizeof(WCHAR)),
1545                              MultiByteToWideChar(CP_ACP,0,id,-1,contname,len)) &&
1546                             (len=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)) &&
1547                             (provname=alloca(len*sizeof(WCHAR)),
1548                              MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,provname,len)))
1549                                 key = capi_get_key(ctx,(TCHAR *)contname,
1550                                                 (TCHAR *)provname,
1551                                                 ctx->csptype,ctx->keytype);
1552                         }
1553                 else
1554                         key = capi_get_key(ctx, (TCHAR *)id,
1555                                                 (TCHAR *)ctx->cspname,
1556                                                 ctx->csptype,ctx->keytype);
1557                 break;
1558                 }
1559
1560         return key;
1561         }
1562
1563 void capi_free_key(CAPI_KEY *key)
1564         {
1565         if (!key)
1566                 return;
1567         CryptDestroyKey(key->key);
1568         CryptReleaseContext(key->hprov, 0);
1569         if (key->pcert)
1570                 CertFreeCertificateContext(key->pcert);
1571         OPENSSL_free(key);
1572         }
1573
1574
1575 /* Initialize a CAPI_CTX structure */
1576
1577 static CAPI_CTX *capi_ctx_new()
1578         {
1579         CAPI_CTX *ctx;
1580         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1581         if (!ctx)
1582                 {
1583                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1584                 return NULL;
1585                 }
1586         ctx->cspname = NULL;
1587         ctx->csptype = PROV_RSA_FULL;
1588         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1589         ctx->keytype = AT_KEYEXCHANGE;
1590         ctx->storename = NULL;
1591         ctx->ssl_client_store = NULL;
1592         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1593                                 CERT_STORE_READONLY_FLAG |
1594                                 CERT_SYSTEM_STORE_CURRENT_USER;
1595         ctx->lookup_method = CAPI_LU_SUBSTR;
1596         ctx->debug_level = 0;
1597         ctx->debug_file = NULL;
1598         ctx->client_cert_select = cert_select_simple;
1599         return ctx;
1600         }
1601
1602 static void capi_ctx_free(CAPI_CTX *ctx)
1603         {
1604         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1605         if (!ctx)
1606                 return;
1607         if (ctx->cspname)
1608                 OPENSSL_free(ctx->cspname);
1609         if (ctx->debug_file)
1610                 OPENSSL_free(ctx->debug_file);
1611         if (ctx->storename)
1612                 OPENSSL_free(ctx->storename);
1613         if (ctx->ssl_client_store)
1614                 OPENSSL_free(ctx->ssl_client_store);
1615         OPENSSL_free(ctx);
1616         }
1617
1618 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1619         {
1620         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1621         if (check)
1622                 {
1623                 HCRYPTPROV hprov;
1624                 LPTSTR name=NULL;
1625
1626                 if (sizeof(TCHAR)!=sizeof(char))
1627                         {
1628                         DWORD len;
1629                         if ((len=MultiByteToWideChar(CP_ACP,0,pname,-1,NULL,0)))
1630                                 {
1631                                 name = alloca(len*sizeof(WCHAR));
1632                                 MultiByteToWideChar(CP_ACP,0,pname,-1,(WCHAR *)name,len);
1633                                 }
1634                         }
1635                 else
1636                         name = (TCHAR *)pname;
1637
1638                 if (!name || !CryptAcquireContext(&hprov, NULL, name, type,
1639                                                 CRYPT_VERIFYCONTEXT))
1640                         {
1641                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1642                         capi_addlasterror();
1643                         return 0;
1644                         }
1645                 CryptReleaseContext(hprov, 0);
1646                 }
1647         ctx->cspname = BUF_strdup(pname);
1648         ctx->csptype = type;
1649         return 1;
1650         }
1651
1652 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1653         {
1654         LPSTR pname;
1655         DWORD type;
1656         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1657                 return 0;
1658         return capi_ctx_set_provname(ctx, pname, type, 0);
1659         }
1660
1661 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1662         {
1663         int i;
1664         X509_NAME *nm;
1665         /* Special case: empty list: match anything */
1666         if (sk_X509_NAME_num(ca_dn) <= 0)
1667                 return 1;
1668         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1669                 {
1670                 nm = sk_X509_NAME_value(ca_dn, i);
1671                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1672                                 return 1;
1673                 }
1674         return 0;
1675         }
1676
1677
1678
1679 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1680         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1681         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1682         {
1683         STACK_OF(X509) *certs = NULL;
1684         X509 *x;
1685         char *storename;
1686         const char *p;
1687         int i, client_cert_idx;
1688         HCERTSTORE hstore;
1689         PCCERT_CONTEXT cert = NULL, excert = NULL;
1690         CAPI_CTX *ctx;
1691         CAPI_KEY *key;
1692         ctx = ENGINE_get_ex_data(e, capi_idx);
1693
1694         *pcert = NULL;
1695         *pkey = NULL;
1696
1697         storename = ctx->ssl_client_store;
1698         if (!storename)
1699                 storename = "MY";
1700
1701         hstore = capi_open_store(ctx, storename);
1702         if (!hstore)
1703                 return 0;
1704         /* Enumerate all certificates collect any matches */
1705         for(i = 0;;i++)
1706                 {
1707                 cert = CertEnumCertificatesInStore(hstore, cert);
1708                 if (!cert)
1709                         break;
1710                 p = cert->pbCertEncoded;
1711                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1712                 if (!x)
1713                         {
1714                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1715                         continue;
1716                         }
1717                 if (cert_issuer_match(ca_dn, x)
1718                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1719                         {
1720                         key = capi_get_cert_key(ctx, cert);
1721                         if (!key)
1722                                 {
1723                                 X509_free(x);
1724                                 continue;
1725                                 }
1726                         /* Match found: attach extra data to it so
1727                          * we can retrieve the key later.
1728                          */
1729                         excert = CertDuplicateCertificateContext(cert);
1730                         key->pcert = excert;
1731                         X509_set_ex_data(x, cert_capi_idx, key);
1732
1733                         if (!certs)
1734                                 certs = sk_X509_new_null();
1735
1736                         sk_X509_push(certs, x);
1737                         }
1738                 else
1739                         X509_free(x);
1740
1741                 }
1742
1743         if (cert)
1744                 CertFreeCertificateContext(cert);
1745         if (hstore)
1746                 CertCloseStore(hstore, 0);
1747
1748         if (!certs)
1749                 return 0;
1750
1751
1752         /* Select the appropriate certificate */
1753
1754         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1755
1756         /* Set the selected certificate and free the rest */
1757
1758         for(i = 0; i < sk_X509_num(certs); i++)
1759                 {
1760                 x = sk_X509_value(certs, i);
1761                 if (i == client_cert_idx)
1762                         *pcert = x;
1763                 else
1764                         {
1765                         key = X509_get_ex_data(x, cert_capi_idx);
1766                         capi_free_key(key);
1767                         X509_free(x);
1768                         }
1769                 }
1770
1771         sk_X509_free(certs);
1772
1773         if (!*pcert)
1774                 return 0;
1775
1776         /* Setup key for selected certificate */
1777
1778         key = X509_get_ex_data(*pcert, cert_capi_idx);
1779         *pkey = capi_get_pkey(e, key);
1780         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1781
1782         return 1;
1783
1784         }
1785
1786
1787 /* Simple client cert selection function: always select first */
1788
1789 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1790         {
1791         return 0;
1792         }
1793
1794 #ifdef OPENSSL_CAPIENG_DIALOG
1795
1796 /* More complex cert selection function, using standard function
1797  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1798  */
1799
1800 /* Definitions which are in cryptuiapi.h but this is not present in older
1801  * versions of headers.
1802  */
1803
1804 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1805 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1806 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1807 #endif
1808
1809 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1810 #define dlg_prompt L"Select a certificate to use for authentication"
1811 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1812                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1813
1814 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1815         {
1816         X509 *x;
1817         HCERTSTORE dstore;
1818         PCCERT_CONTEXT cert;
1819         CAPI_CTX *ctx;
1820         CAPI_KEY *key;
1821         HWND hwnd;
1822         int i, idx = -1;
1823         if (sk_X509_num(certs) == 1)
1824                 return 0;
1825         ctx = ENGINE_get_ex_data(e, capi_idx);
1826         /* Create an in memory store of certificates */
1827         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1828                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1829         if (!dstore)
1830                 {
1831                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1832                 capi_addlasterror();
1833                 goto err;
1834                 }
1835         /* Add all certificates to store */
1836         for(i = 0; i < sk_X509_num(certs); i++)
1837                 {
1838                 x = sk_X509_value(certs, i);
1839                 key = X509_get_ex_data(x, cert_capi_idx);
1840
1841                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1842                                                 CERT_STORE_ADD_NEW, NULL))
1843                         {
1844                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1845                         capi_addlasterror();
1846                         goto err;
1847                         }
1848
1849                 }
1850         hwnd = GetForegroundWindow();
1851         if (!hwnd)
1852                 hwnd = GetActiveWindow();
1853         if (!hwnd && ctx->getconswindow)
1854                 hwnd = ctx->getconswindow();
1855         /* Call dialog to select one */
1856         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1857                                                 dlg_columns, 0, NULL);
1858
1859         /* Find matching cert from list */
1860         if (cert)
1861                 {
1862                 for(i = 0; i < sk_X509_num(certs); i++)
1863                         {
1864                         x = sk_X509_value(certs, i);
1865                         key = X509_get_ex_data(x, cert_capi_idx);
1866                         if (CertCompareCertificate(
1867                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1868                                         cert->pCertInfo,
1869                                         key->pcert->pCertInfo))
1870                                 {
1871                                 idx = i;
1872                                 break;
1873                                 }
1874                         }
1875                 }
1876
1877         err:
1878         if (dstore)
1879                 CertCloseStore(dstore, 0);
1880         return idx;
1881
1882         }
1883 #endif
1884
1885 #else /* !__COMPILE_CAPIENG */
1886 #include <openssl/engine.h>
1887 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1888 OPENSSL_EXPORT
1889 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1890 OPENSSL_EXPORT
1891 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1892 IMPLEMENT_DYNAMIC_CHECK_FN()
1893 #else
1894 void ENGINE_load_capi(void){}
1895 #endif
1896 #endif