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
 451         if (capi_idx < 0)
 452                 {
 453                 capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 454                 if (capi_idx < 0)
 455                         goto memerr;
 456
 457                 cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 458
 459                 /* Setup RSA_METHOD */
 460                 rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 461                 ossl_rsa_meth = RSA_PKCS1_SSLeay();
 462                 capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 463                 capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 464                 capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 465                 capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 466
 467                 /* Setup DSA Method */
 468                 dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 469                 ossl_dsa_meth = DSA_OpenSSL();
 470                 capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 471                 capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 472                 capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 473                 }
 474
 475         ctx = capi_ctx_new();
 476         if (!ctx)
 477                 goto memerr;
 478
 479         ENGINE_set_ex_data(e, capi_idx, ctx);
 480
 481 #ifdef OPENSSL_CAPIENG_DIALOG
 482         {
 483         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 484         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 485         if (cryptui)
 486                 ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
 487         if (kernel)
 488                 ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
 489         if (cryptui && !OPENSSL_isservice())
 490                 ctx->client_cert_select = cert_select_dialog;
 491         }
 492 #endif
 493
 494
 495         return 1;
 496
 497         memerr:
 498         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 499         return 0;
 500
 501         return 1;
 502         }
 503
 504 static int capi_destroy(ENGINE *e)
 505         {
 506         ERR_unload_CAPI_strings();
 507         return 1;
 508         }
 509
 510 static int capi_finish(ENGINE *e)
 511         {
 512         CAPI_CTX *ctx;
 513         ctx = ENGINE_get_ex_data(e, capi_idx);
 514         capi_ctx_free(ctx);
 515         ENGINE_set_ex_data(e, capi_idx, NULL);
 516         return 1;
 517         }
 518
 519
 520 /* CryptoAPI key application data. This contains
 521  * a handle to the private key container (for sign operations)
 522  * and a handle to the key (for decrypt operations).
 523  */
 524
 525 struct CAPI_KEY_st
 526         {
 527         /* Associated certificate context (if any) */
 528         PCCERT_CONTEXT pcert;
 529         HCRYPTPROV hprov;
 530         HCRYPTKEY key;
 531         DWORD keyspec;
 532         };
 533
 534 static int bind_capi(ENGINE *e)
 535         {
 536         if (!ENGINE_set_id(e, engine_capi_id)
 537                 || !ENGINE_set_name(e, engine_capi_name)
 538                 || !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL)
 539                 || !ENGINE_set_init_function(e, capi_init)
 540                 || !ENGINE_set_finish_function(e, capi_finish)
 541                 || !ENGINE_set_destroy_function(e, capi_destroy)
 542                 || !ENGINE_set_RSA(e, &capi_rsa_method)
 543                 || !ENGINE_set_DSA(e, &capi_dsa_method)
 544                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 545                 || !ENGINE_set_load_ssl_client_cert_function(e,
 546                                                 capi_load_ssl_client_cert)
 547                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 548                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
 549                         return 0;
 550         ERR_load_CAPI_strings();
 551
 552         return 1;
 553
 554         }
 555
 556 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 557 static int bind_helper(ENGINE *e, const char *id)
 558         {
 559         if(id && (strcmp(id, engine_capi_id) != 0))
 560                 return 0;
 561         if(!bind_capi(e))
 562                 return 0;
 563         return 1;
 564         }
 565 IMPLEMENT_DYNAMIC_CHECK_FN()
 566 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 567 #else
 568 static ENGINE *engine_capi(void)
 569         {
 570         ENGINE *ret = ENGINE_new();
 571         if(!ret)
 572                 return NULL;
 573         if(!bind_capi(ret))
 574                 {
 575                 ENGINE_free(ret);
 576                 return NULL;
 577                 }
 578         return ret;
 579         }
 580
 581 void ENGINE_load_capi(void)
 582         {
 583         /* Copied from eng_[openssl|dyn].c */
 584         ENGINE *toadd = engine_capi();
 585         if(!toadd) return;
 586         ENGINE_add(toadd);
 587         ENGINE_free(toadd);
 588         ERR_clear_error();
 589         }
 590 #endif
 591
 592
 593 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 594         {
 595         int i;
 596         /* Reverse buffer in place: since this is a keyblob structure
 597          * that will be freed up after conversion anyway it doesn't
 598          * matter if we change it.
 599          */
 600         for(i = 0; i < binlen / 2; i++)
 601                 {
 602                 unsigned char c;
 603                 c = bin[i];
 604                 bin[i] = bin[binlen - i - 1];
 605                 bin[binlen - i - 1] = c;
 606                 }
 607
 608         if (!BN_bin2bn(bin, binlen, bn))
 609                 return 0;
 610         return 1;
 611         }
 612
 613 /* Given a CAPI_KEY get an EVP_PKEY structure */
 614
 615 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
 616         {
 617         unsigned char *pubkey = NULL;
 618         DWORD len;
 619         BLOBHEADER *bh;
 620         RSA *rkey = NULL;
 621         DSA *dkey = NULL;
 622         EVP_PKEY *ret = NULL;
 623         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
 624                 {
 625                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 626                 capi_addlasterror();
 627                 return NULL;
 628                 }
 629
 630         pubkey = OPENSSL_malloc(len);
 631
 632         if (!pubkey)
 633                 goto memerr;
 634
 635         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
 636                 {
 637                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 638                 capi_addlasterror();
 639                 goto err;
 640                 }
 641
 642         bh = (BLOBHEADER *)pubkey;
 643         if (bh->bType != PUBLICKEYBLOB)
 644                 {
 645                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 646                 goto err;
 647                 }
 648         if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
 649                 {
 650                 RSAPUBKEY *rp;
 651                 DWORD rsa_modlen;
 652                 unsigned char *rsa_modulus;
 653                 rp = (RSAPUBKEY *)(bh + 1);
 654                 if (rp->magic != 0x31415352)
 655                         {
 656                         char magstr[10];
 657                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
 658                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 659                         ERR_add_error_data(2, "magic=0x", magstr);
 660                         goto err;
 661                         }
 662                 rsa_modulus = (unsigned char *)(rp + 1);
 663                 rkey = RSA_new_method(eng);
 664                 if (!rkey)
 665                         goto memerr;
 666
 667                 rkey->e = BN_new();
 668                 rkey->n = BN_new();
 669
 670                 if (!rkey->e || !rkey->n)
 671                         goto memerr;
 672
 673                 if (!BN_set_word(rkey->e, rp->pubexp))
 674                         goto memerr;
 675
 676                 rsa_modlen = rp->bitlen / 8;
 677                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 678                         goto memerr;
 679
 680                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
 681
 682                 if (!(ret = EVP_PKEY_new()))
 683                         goto memerr;
 684
 685                 EVP_PKEY_assign_RSA(ret, rkey);
 686                 rkey = NULL;
 687
 688                 }
 689         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
 690                 {
 691                 DSSPUBKEY *dp;
 692                 DWORD dsa_plen;
 693                 unsigned char *btmp;
 694                 dp = (DSSPUBKEY *)(bh + 1);
 695                 if (dp->magic != 0x31535344)
 696                         {
 697                         char magstr[10];
 698                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
 699                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 700                         ERR_add_error_data(2, "magic=0x", magstr);
 701                         goto err;
 702                         }
 703                 dsa_plen = dp->bitlen / 8;
 704                 btmp = (unsigned char *)(dp + 1);
 705                 dkey = DSA_new_method(eng);
 706                 if (!dkey)
 707                         goto memerr;
 708                 dkey->p = BN_new();
 709                 dkey->q = BN_new();
 710                 dkey->g = BN_new();
 711                 dkey->pub_key = BN_new();
 712                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 713                         goto memerr;
 714                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
 715                         goto memerr;
 716                 btmp += dsa_plen;
 717                 if (!lend_tobn(dkey->q, btmp, 20))
 718                         goto memerr;
 719                 btmp += 20;
 720                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
 721                         goto memerr;
 722                 btmp += dsa_plen;
 723                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 724                         goto memerr;
 725                 btmp += dsa_plen;
 726
 727                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
 728
 729                 if (!(ret = EVP_PKEY_new()))
 730                         goto memerr;
 731
 732                 EVP_PKEY_assign_DSA(ret, dkey);
 733                 dkey = NULL;
 734                 }
 735         else
 736                 {
 737                 char algstr[10];
 738                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 739                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 740                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 741                 goto err;
 742                 }
 743
 744
 745         err:
 746         if (pubkey)
 747                 OPENSSL_free(pubkey);
 748         if (!ret)
 749                 {
 750                 if (rkey)
 751                         RSA_free(rkey);
 752                 if (dkey)
 753                         DSA_free(dkey);
 754                 }
 755
 756         return ret;
 757
 758 memerr:
 759         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 760         goto err;
 761
 762         }
 763
 764 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 765         UI_METHOD *ui_method, void *callback_data)
 766         {
 767         CAPI_CTX *ctx;
 768         CAPI_KEY *key;
 769         EVP_PKEY *ret;
 770         ctx = ENGINE_get_ex_data(eng, capi_idx);
 771
 772         if (!ctx)
 773                 {
 774                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 775                 return NULL;
 776                 }
 777
 778         key = capi_find_key(ctx, key_id);
 779
 780         if (!key)
 781                 return NULL;
 782
 783         ret = capi_get_pkey(eng, key);
 784
 785         if (!ret)
 786                 capi_free_key(key);
 787         return ret;
 788
 789         }
 790
 791 /* CryptoAPI RSA operations */
 792
 793 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 794                 unsigned char *to, RSA *rsa, int padding)
 795         {
 796         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 797         return -1;
 798         }
 799
 800 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 801              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 802         {
 803         ALG_ID alg;
 804         HCRYPTHASH hash;
 805         DWORD slen;
 806         unsigned int i;
 807         int ret = -1;
 808         CAPI_KEY *capi_key;
 809         CAPI_CTX *ctx;
 810
 811         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 812
 813         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 814
 815         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 816         if (!capi_key)
 817                 {
 818                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 819                 return -1;
 820                 }
 821 /* Convert the signature type to a CryptoAPI algorithm ID */
 822         switch(dtype)
 823                 {
 824         case NID_sha1:
 825                 alg = CALG_SHA1;
 826                 break;
 827
 828         case NID_md5:
 829                 alg = CALG_MD5;
 830                 break;
 831
 832         case NID_md5_sha1:
 833                 alg = CALG_SSL3_SHAMD5;
 834                 break;
 835         default:
 836                 {
 837                 char algstr[10];
 838                 BIO_snprintf(algstr, 10, "%lx", dtype);
 839                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 840                 ERR_add_error_data(2, "NID=0x", algstr);
 841                 return -1;
 842                 }
 843         }
 844
 845
 846
 847 /* Create the hash object */
 848         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
 849                 {
 850                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 851                 capi_addlasterror();
 852                 return -1;
 853                 }
 854 /* Set the hash value to the value passed */
 855
 856         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
 857                 {
 858                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 859                 capi_addlasterror();
 860                 goto err;
 861                 }
 862
 863
 864 /* Finally sign it */
 865         slen = RSA_size(rsa);
 866         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
 867                 {
 868                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 869                 capi_addlasterror();
 870                 goto err;
 871                 }
 872         else
 873                 {
 874                 ret = 1;
 875                 /* Inplace byte reversal of signature */
 876                 for(i = 0; i < slen / 2; i++)
 877                         {
 878                         unsigned char c;
 879                         c = sigret[i];
 880                         sigret[i] = sigret[slen - i - 1];
 881                         sigret[slen - i - 1] = c;
 882                         }
 883                 *siglen = slen;
 884                 }
 885
 886         /* Now cleanup */
 887
 888 err:
 889         CryptDestroyHash(hash);
 890
 891         return ret;
 892         }
 893
 894 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 895                 unsigned char *to, RSA *rsa, int padding)
 896         {
 897         int i;
 898         unsigned char *tmpbuf;
 899         CAPI_KEY *capi_key;
 900         CAPI_CTX *ctx;
 901         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 902
 903         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 904
 905
 906         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 907         if (!capi_key)
 908                 {
 909                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 910                 return -1;
 911                 }
 912
 913         if(padding != RSA_PKCS1_PADDING)
 914                 {
 915                 char errstr[10];
 916                 BIO_snprintf(errstr, 10, "%d", padding);
 917                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 918                 ERR_add_error_data(2, "padding=", errstr);
 919                 return -1;
 920                 }
 921
 922         /* Create temp reverse order version of input */
 923         if(!(tmpbuf = OPENSSL_malloc(flen)) )
 924                 {
 925                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 926                 return -1;
 927                 }
 928         for(i = 0; i < flen; i++)
 929                 tmpbuf[flen - i - 1] = from[i];
 930
 931         /* Finally decrypt it */
 932         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
 933                 {
 934                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 935                 capi_addlasterror();
 936                 OPENSSL_free(tmpbuf);
 937                 return -1;
 938                 }
 939         else memcpy(to, tmpbuf, flen);
 940
 941         OPENSSL_free(tmpbuf);
 942
 943         return flen;
 944         }
 945
 946 static int capi_rsa_free(RSA *rsa)
 947         {
 948         CAPI_KEY *capi_key;
 949         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 950         capi_free_key(capi_key);
 951         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 952         return 1;
 953         }
 954
 955 /* CryptoAPI DSA operations */
 956
 957 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 958                                                                 DSA *dsa)
 959         {
 960         HCRYPTHASH hash;
 961         DWORD slen;
 962         DSA_SIG *ret = NULL;
 963         CAPI_KEY *capi_key;
 964         CAPI_CTX *ctx;
 965         unsigned char csigbuf[40];
 966
 967         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 968
 969         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 970
 971         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 972
 973         if (!capi_key)
 974                 {
 975                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 976                 return NULL;
 977                 }
 978
 979         if (dlen != 20)
 980                 {
 981                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 982                 return NULL;
 983                 }
 984
 985         /* Create the hash object */
 986         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
 987                 {
 988                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 989                 capi_addlasterror();
 990                 return NULL;
 991                 }
 992
 993         /* Set the hash value to the value passed */
 994         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
 995                 {
 996                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 997                 capi_addlasterror();
 998                 goto err;
 999                 }
1000
1001
1002         /* Finally sign it */
1003         slen = sizeof(csigbuf);
1004         if(!CryptSignHash(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
1005                 {
1006                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
1007                 capi_addlasterror();
1008                 goto err;
1009                 }
1010         else
1011                 {
1012                 ret = DSA_SIG_new();
1013                 if (!ret)
1014                         goto err;
1015                 ret->r = BN_new();
1016                 ret->s = BN_new();
1017                 if (!ret->r || !ret->s)
1018                         goto err;
1019                 if (!lend_tobn(ret->r, csigbuf, 20)
1020                         || !lend_tobn(ret->s, csigbuf + 20, 20))
1021                         {
1022                         DSA_SIG_free(ret);
1023                         ret = NULL;
1024                         goto err;
1025                         }
1026                 }
1027
1028         /* Now cleanup */
1029
1030 err:
1031         OPENSSL_cleanse(csigbuf, 40);
1032         CryptDestroyHash(hash);
1033         return ret;
1034         }
1035
1036 static int capi_dsa_free(DSA *dsa)
1037         {
1038         CAPI_KEY *capi_key;
1039         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1040         capi_free_key(capi_key);
1041         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1042         return 1;
1043         }
1044
1045 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1046         {
1047         BIO *out;
1048
1049         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1050                 return;
1051         out = BIO_new_file(ctx->debug_file, "a+");
1052         BIO_vprintf(out, format, argptr);
1053         BIO_free(out);
1054         }
1055
1056 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1057         {
1058         va_list args;
1059         va_start(args, format);
1060         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1061         va_end(args);
1062         }
1063
1064 static void capi_addlasterror(void)
1065         {
1066         capi_adderror(GetLastError());
1067         }
1068
1069 static void capi_adderror(DWORD err)
1070         {
1071         char errstr[10];
1072         BIO_snprintf(errstr, 10, "%lX", err);
1073         ERR_add_error_data(2, "Error code= 0x", errstr);
1074         }
1075
1076 static char *wide_to_asc(LPCWSTR wstr)
1077         {
1078         char *str;
1079         int len_0,sz;
1080
1081         if (!wstr)
1082                 return NULL;
1083         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1084         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1085         if (!sz)
1086                 {
1087                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1088                 return NULL;
1089                 }
1090         str = OPENSSL_malloc(sz);
1091         if (!str)
1092                 {
1093                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1094                 return NULL;
1095                 }
1096         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1097                 {
1098                 OPENSSL_free(str);
1099                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1100                 return NULL;
1101                 }
1102         return str;
1103         }
1104
1105 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1106         {
1107         DWORD len, err;
1108         LPTSTR name;
1109         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1110         if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len))
1111                 {
1112                 err = GetLastError();
1113                 if (err == ERROR_NO_MORE_ITEMS)
1114                         return 2;
1115                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1116                 capi_adderror(err);
1117                 return 0;
1118                 }
1119         if (sizeof(TCHAR) != sizeof(char))
1120                 name = alloca(len);
1121         else
1122                 name = OPENSSL_malloc(len);
1123         if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len))
1124                 {
1125                 err = GetLastError();
1126                 if (err == ERROR_NO_MORE_ITEMS)
1127                         return 2;
1128                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1129                 capi_adderror(err);
1130                 return 0;
1131                 }
1132         if (sizeof(TCHAR) != sizeof(char))
1133                 *pname = wide_to_asc((WCHAR *)name);
1134         else
1135                 *pname = (char *)name;
1136         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", *pname, *ptype);
1137
1138         return 1;
1139         }
1140
1141 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1142         {
1143         DWORD idx, ptype;
1144         int ret;
1145         LPSTR provname = NULL;
1146         CAPI_trace(ctx, "capi_list_providers\n");
1147         BIO_printf(out, "Available CSPs:\n");
1148         for(idx = 0; ; idx++)
1149                 {
1150                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1151                 if (ret == 2)
1152                         break;
1153                 if (ret == 0)
1154                         break;
1155                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1156                 OPENSSL_free(provname);
1157                 }
1158         return 1;
1159         }
1160
1161 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1162         {
1163         int ret = 1;
1164         HCRYPTPROV hprov;
1165         DWORD err, idx, flags, buflen = 0, clen;
1166         LPSTR cname;
1167         LPTSTR cspname = NULL;
1168
1169         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1170         if (ctx->cspname && sizeof(TCHAR)!=sizeof(char))
1171                 {
1172                 if ((clen=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)))
1173                         {
1174                         cspname = alloca(clen*sizeof(WCHAR));
1175                         MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,(WCHAR *)cspname,clen);
1176                         }
1177                 if (!cspname)
1178                         {
1179                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1180                         capi_addlasterror();
1181                         return 0;
1182                         }
1183                 }
1184         else
1185                 cspname = (TCHAR *)ctx->cspname;
1186         if (!CryptAcquireContext(&hprov, NULL, cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1187                 {
1188                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1189                 capi_addlasterror();
1190                 return 0;
1191                 }
1192         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1193                 {
1194                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1195                 capi_addlasterror();
1196                 CryptReleaseContext(hprov, 0);
1197                 return 0;
1198                 }
1199         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1200         if (buflen == 0)
1201                 buflen = 1024;
1202         cname = OPENSSL_malloc(buflen);
1203         if (!cname)
1204                 {
1205                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1206                 goto err;
1207                 }
1208
1209         for (idx = 0;;idx++)
1210                 {
1211                 clen = buflen;
1212                 cname[0] = 0;
1213
1214                 if (idx == 0)
1215                         flags = CRYPT_FIRST;
1216                 else
1217                         flags = 0;
1218                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, (BYTE *)cname, &clen, flags))
1219                         {
1220                         err = GetLastError();
1221                         if (err == ERROR_NO_MORE_ITEMS)
1222                                 goto done;
1223                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1224                         capi_adderror(err);
1225                         goto err;
1226                         }
1227                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1228                 if (!cname[0] && (clen == buflen))
1229                         {
1230                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1231                         goto done;
1232                         }
1233                 BIO_printf(out, "%d. %s\n", idx, cname);
1234                 }
1235         err:
1236
1237         ret = 0;
1238
1239         done:
1240         if (cname)
1241                 OPENSSL_free(cname);
1242         CryptReleaseContext(hprov, 0);
1243
1244         return ret;
1245         }
1246
1247 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1248         {
1249         DWORD len;
1250         CRYPT_KEY_PROV_INFO *pinfo;
1251
1252         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1253                 return NULL;
1254         pinfo = OPENSSL_malloc(len);
1255         if (!pinfo)
1256                 {
1257                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1258                 return NULL;
1259                 }
1260         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1261                 {
1262                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1263                 capi_addlasterror();
1264                 OPENSSL_free(pinfo);
1265                 return NULL;
1266                 }
1267         return pinfo;
1268         }
1269
1270 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1271         {
1272         char *provname = NULL, *contname = NULL;
1273         if (!pinfo)
1274                 {
1275                 BIO_printf(out, "  No Private Key\n");
1276                 return;
1277                 }
1278         provname = wide_to_asc(pinfo->pwszProvName);
1279         contname = wide_to_asc(pinfo->pwszContainerName);
1280         if (!provname || !contname)
1281                 goto err;
1282
1283         BIO_printf(out, "  Private Key Info:\n");
1284         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1285         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1286         err:
1287         if (provname)
1288                 OPENSSL_free(provname);
1289         if (contname)
1290                 OPENSSL_free(contname);
1291         }
1292
1293 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1294         {
1295         LPWSTR wfname;
1296         DWORD dlen;
1297
1298         CAPI_trace(ctx, "capi_cert_get_fname\n");
1299         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1300                 return NULL;
1301         wfname = OPENSSL_malloc(dlen);
1302         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1303                 {
1304                 char *fname = wide_to_asc(wfname);
1305                 OPENSSL_free(wfname);
1306                 return fname;
1307                 }
1308         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1309         capi_addlasterror();
1310
1311         OPENSSL_free(wfname);
1312         return NULL;
1313         }
1314
1315
1316 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1317         {
1318         X509 *x;
1319         unsigned char *p;
1320         unsigned long flags = ctx->dump_flags;
1321         if (flags & CAPI_DMP_FNAME)
1322                 {
1323                 char *fname;
1324                 fname = capi_cert_get_fname(ctx, cert);
1325                 if (fname)
1326                         {
1327                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1328                         OPENSSL_free(fname);
1329                         }
1330                 else
1331                         BIO_printf(out, "  <No Friendly Name>\n");
1332                 }
1333
1334         p = cert->pbCertEncoded;
1335         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1336         if (!x)
1337                 BIO_printf(out, "  <Can't parse certificate>\n");
1338         if (flags & CAPI_DMP_SUMMARY)
1339                 {
1340                 BIO_printf(out, "  Subject: ");
1341                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1342                 BIO_printf(out, "\n  Issuer: ");
1343                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1344                 BIO_printf(out, "\n");
1345                 }
1346         if (flags & CAPI_DMP_FULL)
1347                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1348
1349         if (flags & CAPI_DMP_PKEYINFO)
1350                 {
1351                 CRYPT_KEY_PROV_INFO *pinfo;
1352                 pinfo = capi_get_prov_info(ctx, cert);
1353                 capi_dump_prov_info(ctx, out, pinfo);
1354                 if (pinfo)
1355                         OPENSSL_free(pinfo);
1356                 }
1357
1358         if (flags & CAPI_DMP_PEM)
1359                 PEM_write_bio_X509(out, x);
1360         X509_free(x);
1361         }
1362
1363 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1364         {
1365         HCERTSTORE hstore;
1366
1367         if (!storename)
1368                 storename = ctx->storename;
1369         if (!storename)
1370                 storename = "MY";
1371         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1372
1373         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1374                                 ctx->store_flags, storename);
1375         if (!hstore)
1376                 {
1377                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1378                 capi_addlasterror();
1379                 }
1380         return hstore;
1381         }
1382
1383 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1384         {
1385         char *storename;
1386         int idx;
1387         int ret = 1;
1388         HCERTSTORE hstore;
1389         PCCERT_CONTEXT cert = NULL;
1390
1391         storename = ctx->storename;
1392         if (!storename)
1393                 storename = "MY";
1394         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1395
1396         hstore = capi_open_store(ctx, storename);
1397         if (!hstore)
1398                 return 0;
1399         if (id)
1400                 {
1401                 cert = capi_find_cert(ctx, id, hstore);
1402                 if (!cert)
1403                         {
1404                         ret = 0;
1405                         goto err;
1406                         }
1407                 capi_dump_cert(ctx, out, cert);
1408                 CertFreeCertificateContext(cert);
1409                 }
1410         else
1411                 {
1412                 for(idx = 0;;idx++)
1413                         {
1414                         cert = CertEnumCertificatesInStore(hstore, cert);
1415                         if (!cert)
1416                                 break;
1417                         BIO_printf(out, "Certificate %d\n", idx);
1418                         capi_dump_cert(ctx, out, cert);
1419                         }
1420                 }
1421         err:
1422         CertCloseStore(hstore, 0);
1423         return ret;
1424         }
1425
1426 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1427         {
1428         PCCERT_CONTEXT cert = NULL;
1429         char *fname = NULL;
1430         int match;
1431         switch(ctx->lookup_method)
1432                 {
1433                 case CAPI_LU_SUBSTR:
1434                         return CertFindCertificateInStore(hstore,
1435                                         X509_ASN_ENCODING, 0,
1436                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1437                 case CAPI_LU_FNAME:
1438                         for(;;)
1439                                 {
1440                                 cert = CertEnumCertificatesInStore(hstore, cert);
1441                                 if (!cert)
1442                                         return NULL;
1443                                 fname = capi_cert_get_fname(ctx, cert);
1444                                 if (fname)
1445                                         {
1446                                         if (strcmp(fname, id))
1447                                                 match = 0;
1448                                         else
1449                                                 match = 1;
1450                                         OPENSSL_free(fname);
1451                                         if (match)
1452                                                 return cert;
1453                                         }
1454                                 }
1455                 default:
1456                         return NULL;
1457                 }
1458         }
1459
1460 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const TCHAR *contname, TCHAR *provname, DWORD ptype, DWORD keyspec)
1461         {
1462         CAPI_KEY *key;
1463         DWORD dwFlags = 0;
1464         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1465         if (sizeof(TCHAR)==sizeof(char))
1466                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1467                                                 contname, provname, ptype);
1468         else if (ctx && ctx->debug_level>=CAPI_DBG_TRACE && ctx->debug_file)
1469                 {
1470                 /* above 'if' is optimization to minimize malloc-ations */
1471                 char *_contname = wide_to_asc((WCHAR *)contname);
1472                 char *_provname = wide_to_asc((WCHAR *)provname);
1473
1474                 CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1475                                                 _contname, _provname, ptype);
1476                 if (_provname) OPENSSL_free(_provname);
1477                 if (_contname) OPENSSL_free(_contname);
1478                 }
1479         if(ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
1480                 dwFlags = CRYPT_MACHINE_KEYSET;
1481         if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, dwFlags))
1482                 {
1483                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1484                 capi_addlasterror();
1485                 goto err;
1486                 }
1487         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1488                 {
1489                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1490                 capi_addlasterror();
1491                 CryptReleaseContext(key->hprov, 0);
1492                 goto err;
1493                 }
1494         key->keyspec = keyspec;
1495         key->pcert = NULL;
1496         return key;
1497
1498         err:
1499         OPENSSL_free(key);
1500         return NULL;
1501         }
1502
1503 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1504         {
1505         CAPI_KEY *key = NULL;
1506         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1507         char *provname = NULL, *contname = NULL;
1508         pinfo = capi_get_prov_info(ctx, cert);
1509         if (!pinfo)
1510                 goto err;
1511         if (sizeof(TCHAR) != sizeof(char))
1512                 key = capi_get_key(ctx, (TCHAR *)pinfo->pwszContainerName,
1513                                 (TCHAR *)pinfo->pwszProvName,
1514                                 pinfo->dwProvType, pinfo->dwKeySpec);
1515         else
1516                 {
1517                 provname = wide_to_asc(pinfo->pwszProvName);
1518                 contname = wide_to_asc(pinfo->pwszContainerName);
1519                 if (!provname || !contname)
1520                         goto err;
1521                 key = capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
1522                                 pinfo->dwProvType, pinfo->dwKeySpec);
1523                 }
1524
1525         err:
1526         if (pinfo)
1527                 OPENSSL_free(pinfo);
1528         if (provname)
1529                 OPENSSL_free(provname);
1530         if (contname)
1531                 OPENSSL_free(contname);
1532         return key;
1533         }
1534
1535 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1536         {
1537         PCCERT_CONTEXT cert;
1538         HCERTSTORE hstore;
1539         CAPI_KEY *key = NULL;
1540         switch (ctx->lookup_method)
1541                 {
1542                 case CAPI_LU_SUBSTR:
1543                 case CAPI_LU_FNAME:
1544                 hstore = capi_open_store(ctx, NULL);
1545                 if (!hstore)
1546                         return NULL;
1547                 cert = capi_find_cert(ctx, id, hstore);
1548                 if (cert)
1549                         {
1550                         key = capi_get_cert_key(ctx, cert);
1551                         CertFreeCertificateContext(cert);
1552                         }
1553                 CertCloseStore(hstore, 0);
1554                 break;
1555
1556                 case CAPI_LU_CONTNAME:
1557                 if (sizeof(TCHAR)!=sizeof(char))
1558                         {
1559                         WCHAR *contname, *provname;
1560                         DWORD len;
1561
1562                         if ((len=MultiByteToWideChar(CP_ACP,0,id,-1,NULL,0)) &&
1563                             (contname=alloca(len*sizeof(WCHAR)),
1564                              MultiByteToWideChar(CP_ACP,0,id,-1,contname,len)) &&
1565                             (len=MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,NULL,0)) &&
1566                             (provname=alloca(len*sizeof(WCHAR)),
1567                              MultiByteToWideChar(CP_ACP,0,ctx->cspname,-1,provname,len)))
1568                                 key = capi_get_key(ctx,(TCHAR *)contname,
1569                                                 (TCHAR *)provname,
1570                                                 ctx->csptype,ctx->keytype);
1571                         }
1572                 else
1573                         key = capi_get_key(ctx, (TCHAR *)id,
1574                                                 (TCHAR *)ctx->cspname,
1575                                                 ctx->csptype,ctx->keytype);
1576                 break;
1577                 }
1578
1579         return key;
1580         }
1581
1582 void capi_free_key(CAPI_KEY *key)
1583         {
1584         if (!key)
1585                 return;
1586         CryptDestroyKey(key->key);
1587         CryptReleaseContext(key->hprov, 0);
1588         if (key->pcert)
1589                 CertFreeCertificateContext(key->pcert);
1590         OPENSSL_free(key);
1591         }
1592
1593
1594 /* Initialize a CAPI_CTX structure */
1595
1596 static CAPI_CTX *capi_ctx_new()
1597         {
1598         CAPI_CTX *ctx;
1599         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1600         if (!ctx)
1601                 {
1602                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1603                 return NULL;
1604                 }
1605         ctx->cspname = NULL;
1606         ctx->csptype = PROV_RSA_FULL;
1607         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1608         ctx->keytype = AT_KEYEXCHANGE;
1609         ctx->storename = NULL;
1610         ctx->ssl_client_store = NULL;
1611         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1612                                 CERT_STORE_READONLY_FLAG |
1613                                 CERT_SYSTEM_STORE_CURRENT_USER;
1614         ctx->lookup_method = CAPI_LU_SUBSTR;
1615         ctx->debug_level = 0;
1616         ctx->debug_file = NULL;
1617         ctx->client_cert_select = cert_select_simple;
1618         return ctx;
1619         }
1620
1621 static void capi_ctx_free(CAPI_CTX *ctx)
1622         {
1623         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1624         if (!ctx)
1625                 return;
1626         if (ctx->cspname)
1627                 OPENSSL_free(ctx->cspname);
1628         if (ctx->debug_file)
1629                 OPENSSL_free(ctx->debug_file);
1630         if (ctx->storename)
1631                 OPENSSL_free(ctx->storename);
1632         if (ctx->ssl_client_store)
1633                 OPENSSL_free(ctx->ssl_client_store);
1634         OPENSSL_free(ctx);
1635         }
1636
1637 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1638         {
1639         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1640         if (check)
1641                 {
1642                 HCRYPTPROV hprov;
1643                 LPTSTR name=NULL;
1644
1645                 if (sizeof(TCHAR)!=sizeof(char))
1646                         {
1647                         DWORD len;
1648                         if ((len=MultiByteToWideChar(CP_ACP,0,pname,-1,NULL,0)))
1649                                 {
1650                                 name = alloca(len*sizeof(WCHAR));
1651                                 MultiByteToWideChar(CP_ACP,0,pname,-1,(WCHAR *)name,len);
1652                                 }
1653                         }
1654                 else
1655                         name = (TCHAR *)pname;
1656
1657                 if (!name || !CryptAcquireContext(&hprov, NULL, name, type,
1658                                                 CRYPT_VERIFYCONTEXT))
1659                         {
1660                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1661                         capi_addlasterror();
1662                         return 0;
1663                         }
1664                 CryptReleaseContext(hprov, 0);
1665                 }
1666         if (ctx->cspname)
1667                 OPENSSL_free(ctx->cspname);
1668         ctx->cspname = BUF_strdup(pname);
1669         ctx->csptype = type;
1670         return 1;
1671         }
1672
1673 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1674         {
1675         LPSTR pname;
1676         DWORD type;
1677         int res;
1678         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1679                 return 0;
1680         res = capi_ctx_set_provname(ctx, pname, type, 0);
1681         OPENSSL_free(pname);
1682         return res;
1683         }
1684
1685 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1686         {
1687         int i;
1688         X509_NAME *nm;
1689         /* Special case: empty list: match anything */
1690         if (sk_X509_NAME_num(ca_dn) <= 0)
1691                 return 1;
1692         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1693                 {
1694                 nm = sk_X509_NAME_value(ca_dn, i);
1695                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1696                                 return 1;
1697                 }
1698         return 0;
1699         }
1700
1701
1702
1703 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1704         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1705         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1706         {
1707         STACK_OF(X509) *certs = NULL;
1708         X509 *x;
1709         char *storename;
1710         const char *p;
1711         int i, client_cert_idx;
1712         HCERTSTORE hstore;
1713         PCCERT_CONTEXT cert = NULL, excert = NULL;
1714         CAPI_CTX *ctx;
1715         CAPI_KEY *key;
1716         ctx = ENGINE_get_ex_data(e, capi_idx);
1717
1718         *pcert = NULL;
1719         *pkey = NULL;
1720
1721         storename = ctx->ssl_client_store;
1722         if (!storename)
1723                 storename = "MY";
1724
1725         hstore = capi_open_store(ctx, storename);
1726         if (!hstore)
1727                 return 0;
1728         /* Enumerate all certificates collect any matches */
1729         for(i = 0;;i++)
1730                 {
1731                 cert = CertEnumCertificatesInStore(hstore, cert);
1732                 if (!cert)
1733                         break;
1734                 p = cert->pbCertEncoded;
1735                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1736                 if (!x)
1737                         {
1738                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1739                         continue;
1740                         }
1741                 if (cert_issuer_match(ca_dn, x)
1742                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1743                         {
1744                         key = capi_get_cert_key(ctx, cert);
1745                         if (!key)
1746                                 {
1747                                 X509_free(x);
1748                                 continue;
1749                                 }
1750                         /* Match found: attach extra data to it so
1751                          * we can retrieve the key later.
1752                          */
1753                         excert = CertDuplicateCertificateContext(cert);
1754                         key->pcert = excert;
1755                         X509_set_ex_data(x, cert_capi_idx, key);
1756
1757                         if (!certs)
1758                                 certs = sk_X509_new_null();
1759
1760                         sk_X509_push(certs, x);
1761                         }
1762                 else
1763                         X509_free(x);
1764
1765                 }
1766
1767         if (cert)
1768                 CertFreeCertificateContext(cert);
1769         if (hstore)
1770                 CertCloseStore(hstore, 0);
1771
1772         if (!certs)
1773                 return 0;
1774
1775
1776         /* Select the appropriate certificate */
1777
1778         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1779
1780         /* Set the selected certificate and free the rest */
1781
1782         for(i = 0; i < sk_X509_num(certs); i++)
1783                 {
1784                 x = sk_X509_value(certs, i);
1785                 if (i == client_cert_idx)
1786                         *pcert = x;
1787                 else
1788                         {
1789                         key = X509_get_ex_data(x, cert_capi_idx);
1790                         capi_free_key(key);
1791                         X509_free(x);
1792                         }
1793                 }
1794
1795         sk_X509_free(certs);
1796
1797         if (!*pcert)
1798                 return 0;
1799
1800         /* Setup key for selected certificate */
1801
1802         key = X509_get_ex_data(*pcert, cert_capi_idx);
1803         *pkey = capi_get_pkey(e, key);
1804         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1805
1806         return 1;
1807
1808         }
1809
1810
1811 /* Simple client cert selection function: always select first */
1812
1813 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1814         {
1815         return 0;
1816         }
1817
1818 #ifdef OPENSSL_CAPIENG_DIALOG
1819
1820 /* More complex cert selection function, using standard function
1821  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1822  */
1823
1824 /* Definitions which are in cryptuiapi.h but this is not present in older
1825  * versions of headers.
1826  */
1827
1828 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1829 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1830 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1831 #endif
1832
1833 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1834 #define dlg_prompt L"Select a certificate to use for authentication"
1835 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1836                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1837
1838 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1839         {
1840         X509 *x;
1841         HCERTSTORE dstore;
1842         PCCERT_CONTEXT cert;
1843         CAPI_CTX *ctx;
1844         CAPI_KEY *key;
1845         HWND hwnd;
1846         int i, idx = -1;
1847         if (sk_X509_num(certs) == 1)
1848                 return 0;
1849         ctx = ENGINE_get_ex_data(e, capi_idx);
1850         /* Create an in memory store of certificates */
1851         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1852                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1853         if (!dstore)
1854                 {
1855                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1856                 capi_addlasterror();
1857                 goto err;
1858                 }
1859         /* Add all certificates to store */
1860         for(i = 0; i < sk_X509_num(certs); i++)
1861                 {
1862                 x = sk_X509_value(certs, i);
1863                 key = X509_get_ex_data(x, cert_capi_idx);
1864
1865                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1866                                                 CERT_STORE_ADD_NEW, NULL))
1867                         {
1868                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1869                         capi_addlasterror();
1870                         goto err;
1871                         }
1872
1873                 }
1874         hwnd = GetForegroundWindow();
1875         if (!hwnd)
1876                 hwnd = GetActiveWindow();
1877         if (!hwnd && ctx->getconswindow)
1878                 hwnd = ctx->getconswindow();
1879         /* Call dialog to select one */
1880         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1881                                                 dlg_columns, 0, NULL);
1882
1883         /* Find matching cert from list */
1884         if (cert)
1885                 {
1886                 for(i = 0; i < sk_X509_num(certs); i++)
1887                         {
1888                         x = sk_X509_value(certs, i);
1889                         key = X509_get_ex_data(x, cert_capi_idx);
1890                         if (CertCompareCertificate(
1891                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1892                                         cert->pCertInfo,
1893                                         key->pcert->pCertInfo))
1894                                 {
1895                                 idx = i;
1896                                 break;
1897                                 }
1898                         }
1899                 }
1900
1901         err:
1902         if (dstore)
1903                 CertCloseStore(dstore, 0);
1904         return idx;
1905
1906         }
1907 #endif
1908
1909 #else /* !__COMPILE_CAPIENG */
1910 #include <openssl/engine.h>
1911 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1912 OPENSSL_EXPORT
1913 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1914 OPENSSL_EXPORT
1915 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1916 IMPLEMENT_DYNAMIC_CHECK_FN()
1917 #else
1918 void ENGINE_load_capi(void){}
1919 #endif
1920 #endif