engines/e_capi.c

   1 /* engines/e_capi.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   4  * project.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2008-2018 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  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 # ifndef ALG_SID_SHA_256
 118 #  define ALG_SID_SHA_256                 12
 119 # endif
 120 # ifndef ALG_SID_SHA_384
 121 #  define ALG_SID_SHA_384                 13
 122 # endif
 123 # ifndef ALG_SID_SHA_512
 124 #  define ALG_SID_SHA_512                 14
 125 # endif
 126
 127 # ifndef CALG_SHA_256
 128 #  define CALG_SHA_256            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_256)
 129 # endif
 130 # ifndef CALG_SHA_384
 131 #  define CALG_SHA_384            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_384)
 132 # endif
 133 # ifndef CALG_SHA_512
 134 #  define CALG_SHA_512            (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SHA_512)
 135 # endif
 136
 137 # include <openssl/engine.h>
 138 # include <openssl/pem.h>
 139 # include <openssl/x509v3.h>
 140
 141 # include "e_capi_err.h"
 142 # include "e_capi_err.c"
 143
 144 static const char *engine_capi_id = "capi";
 145 static const char *engine_capi_name = "CryptoAPI ENGINE";
 146
 147 typedef struct CAPI_CTX_st CAPI_CTX;
 148 typedef struct CAPI_KEY_st CAPI_KEY;
 149
 150 static void capi_addlasterror(void);
 151 static void capi_adderror(DWORD err);
 152
 153 static void CAPI_trace(CAPI_CTX * ctx, char *format, ...);
 154
 155 static int capi_list_providers(CAPI_CTX * ctx, BIO *out);
 156 static int capi_list_containers(CAPI_CTX * ctx, BIO *out);
 157 int capi_list_certs(CAPI_CTX * ctx, BIO *out, char *storename);
 158 void capi_free_key(CAPI_KEY * key);
 159
 160 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX * ctx, const char *id,
 161                                      HCERTSTORE hstore);
 162
 163 CAPI_KEY *capi_find_key(CAPI_CTX * ctx, const char *id);
 164
 165 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 166                                    UI_METHOD *ui_method, void *callback_data);
 167 static int capi_rsa_sign(int dtype, const unsigned char *m,
 168                          unsigned int m_len, unsigned char *sigret,
 169                          unsigned int *siglen, const RSA *rsa);
 170 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
 171                              unsigned char *to, RSA *rsa, int padding);
 172 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
 173                              unsigned char *to, RSA *rsa, int padding);
 174 static int capi_rsa_free(RSA *rsa);
 175
 176 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 177                                  DSA *dsa);
 178 static int capi_dsa_free(DSA *dsa);
 179
 180 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
 181                                      STACK_OF(X509_NAME) *ca_dn, X509 **pcert,
 182                                      EVP_PKEY **pkey, STACK_OF(X509) **pother,
 183                                      UI_METHOD *ui_method,
 184                                      void *callback_data);
 185
 186 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 187 # ifdef OPENSSL_CAPIENG_DIALOG
 188 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 189 # endif
 190
 191 typedef PCCERT_CONTEXT(WINAPI *CERTDLG) (HCERTSTORE, HWND, LPCWSTR,
 192                                          LPCWSTR, DWORD, DWORD, void *);
 193 typedef HWND(WINAPI *GETCONSWIN) (void);
 194
 195 /*
 196  * This structure contains CAPI ENGINE specific data: it contains various
 197  * global options and affects how other functions behave.
 198  */
 199
 200 # define CAPI_DBG_TRACE  2
 201 # define CAPI_DBG_ERROR  1
 202
 203 struct CAPI_CTX_st {
 204     int debug_level;
 205     char *debug_file;
 206     /* Parameters to use for container lookup */
 207     DWORD keytype;
 208     LPSTR cspname;
 209     DWORD csptype;
 210     /* Certificate store name to use */
 211     LPSTR storename;
 212     LPSTR ssl_client_store;
 213     /* System store flags */
 214     DWORD store_flags;
 215 /* Lookup string meanings in load_private_key */
 216 /* Substring of subject: uses "storename" */
 217 # define CAPI_LU_SUBSTR          1
 218 /* Friendly name: uses storename */
 219 # define CAPI_LU_FNAME           2
 220 /* Container name: uses cspname, keytype */
 221 # define CAPI_LU_CONTNAME        3
 222     int lookup_method;
 223 /* Info to dump with dumpcerts option */
 224 /* Issuer and serial name strings */
 225 # define CAPI_DMP_SUMMARY        0x1
 226 /* Friendly name */
 227 # define CAPI_DMP_FNAME          0x2
 228 /* Full X509_print dump */
 229 # define CAPI_DMP_FULL           0x4
 230 /* Dump PEM format certificate */
 231 # define CAPI_DMP_PEM            0x8
 232 /* Dump pseudo key (if possible) */
 233 # define CAPI_DMP_PSKEY          0x10
 234 /* Dump key info (if possible) */
 235 # define CAPI_DMP_PKEYINFO       0x20
 236     DWORD dump_flags;
 237     int (*client_cert_select) (ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 238     CERTDLG certselectdlg;
 239     GETCONSWIN getconswindow;
 240 };
 241
 242 static CAPI_CTX *capi_ctx_new();
 243 static void capi_ctx_free(CAPI_CTX * ctx);
 244 static int capi_ctx_set_provname(CAPI_CTX * ctx, LPSTR pname, DWORD type,
 245                                  int check);
 246 static int capi_ctx_set_provname_idx(CAPI_CTX * ctx, int idx);
 247
 248 # define CAPI_CMD_LIST_CERTS             ENGINE_CMD_BASE
 249 # define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
 250 # define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
 251 # define CAPI_CMD_DEBUG_FILE             (ENGINE_CMD_BASE + 3)
 252 # define CAPI_CMD_KEYTYPE                (ENGINE_CMD_BASE + 4)
 253 # define CAPI_CMD_LIST_CSPS              (ENGINE_CMD_BASE + 5)
 254 # define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
 255 # define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
 256 # define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
 257 # define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
 258 # define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
 259 # define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
 260 # define CAPI_CMD_STORE_NAME             (ENGINE_CMD_BASE + 12)
 261 # define CAPI_CMD_STORE_FLAGS            (ENGINE_CMD_BASE + 13)
 262
 263 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
 264     {CAPI_CMD_LIST_CERTS,
 265      "list_certs",
 266      "List all certificates in store",
 267      ENGINE_CMD_FLAG_NO_INPUT},
 268     {CAPI_CMD_LOOKUP_CERT,
 269      "lookup_cert",
 270      "Lookup and output certificates",
 271      ENGINE_CMD_FLAG_STRING},
 272     {CAPI_CMD_DEBUG_LEVEL,
 273      "debug_level",
 274      "debug level (1=errors, 2=trace)",
 275      ENGINE_CMD_FLAG_NUMERIC},
 276     {CAPI_CMD_DEBUG_FILE,
 277      "debug_file",
 278      "debugging filename)",
 279      ENGINE_CMD_FLAG_STRING},
 280     {CAPI_CMD_KEYTYPE,
 281      "key_type",
 282      "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
 283      ENGINE_CMD_FLAG_NUMERIC},
 284     {CAPI_CMD_LIST_CSPS,
 285      "list_csps",
 286      "List all CSPs",
 287      ENGINE_CMD_FLAG_NO_INPUT},
 288     {CAPI_CMD_SET_CSP_IDX,
 289      "csp_idx",
 290      "Set CSP by index",
 291      ENGINE_CMD_FLAG_NUMERIC},
 292     {CAPI_CMD_SET_CSP_NAME,
 293      "csp_name",
 294      "Set CSP name, (default CSP used if not specified)",
 295      ENGINE_CMD_FLAG_STRING},
 296     {CAPI_CMD_SET_CSP_TYPE,
 297      "csp_type",
 298      "Set CSP type, (default RSA_PROV_FULL)",
 299      ENGINE_CMD_FLAG_NUMERIC},
 300     {CAPI_CMD_LIST_CONTAINERS,
 301      "list_containers",
 302      "list container names",
 303      ENGINE_CMD_FLAG_NO_INPUT},
 304     {CAPI_CMD_LIST_OPTIONS,
 305      "list_options",
 306      "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
 307      "32=private key info)",
 308      ENGINE_CMD_FLAG_NUMERIC},
 309     {CAPI_CMD_LOOKUP_METHOD,
 310      "lookup_method",
 311      "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
 312      ENGINE_CMD_FLAG_NUMERIC},
 313     {CAPI_CMD_STORE_NAME,
 314      "store_name",
 315      "certificate store name, default \"MY\"",
 316      ENGINE_CMD_FLAG_STRING},
 317     {CAPI_CMD_STORE_FLAGS,
 318      "store_flags",
 319      "Certificate store flags: 1 = system store",
 320      ENGINE_CMD_FLAG_NUMERIC},
 321
 322     {0, NULL, NULL, 0}
 323 };
 324
 325 static int capi_idx = -1;
 326 static int rsa_capi_idx = -1;
 327 static int dsa_capi_idx = -1;
 328 static int cert_capi_idx = -1;
 329
 330 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
 331 {
 332     int ret = 1;
 333     CAPI_CTX *ctx;
 334     BIO *out;
 335     if (capi_idx == -1) {
 336         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
 337         return 0;
 338     }
 339     ctx = ENGINE_get_ex_data(e, capi_idx);
 340     out = BIO_new_fp(stdout, BIO_NOCLOSE);
 341     switch (cmd) {
 342     case CAPI_CMD_LIST_CSPS:
 343         ret = capi_list_providers(ctx, out);
 344         break;
 345
 346     case CAPI_CMD_LIST_CERTS:
 347         ret = capi_list_certs(ctx, out, NULL);
 348         break;
 349
 350     case CAPI_CMD_LOOKUP_CERT:
 351         ret = capi_list_certs(ctx, out, p);
 352         break;
 353
 354     case CAPI_CMD_LIST_CONTAINERS:
 355         ret = capi_list_containers(ctx, out);
 356         break;
 357
 358     case CAPI_CMD_STORE_NAME:
 359         if (ctx->storename)
 360             OPENSSL_free(ctx->storename);
 361         ctx->storename = BUF_strdup(p);
 362         CAPI_trace(ctx, "Setting store name to %s\n", p);
 363         break;
 364
 365     case CAPI_CMD_STORE_FLAGS:
 366         if (i & 1) {
 367             ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
 368             ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
 369         } else {
 370             ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
 371             ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
 372         }
 373         CAPI_trace(ctx, "Setting flags to %d\n", i);
 374         break;
 375
 376     case CAPI_CMD_DEBUG_LEVEL:
 377         ctx->debug_level = (int)i;
 378         CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
 379         break;
 380
 381     case CAPI_CMD_DEBUG_FILE:
 382         ctx->debug_file = BUF_strdup(p);
 383         CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
 384         break;
 385
 386     case CAPI_CMD_KEYTYPE:
 387         ctx->keytype = i;
 388         CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
 389         break;
 390
 391     case CAPI_CMD_SET_CSP_IDX:
 392         ret = capi_ctx_set_provname_idx(ctx, i);
 393         break;
 394
 395     case CAPI_CMD_LIST_OPTIONS:
 396         ctx->dump_flags = i;
 397         break;
 398
 399     case CAPI_CMD_LOOKUP_METHOD:
 400         if (i < 1 || i > 3) {
 401             CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
 402             return 0;
 403         }
 404         ctx->lookup_method = i;
 405         break;
 406
 407     case CAPI_CMD_SET_CSP_NAME:
 408         ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
 409         break;
 410
 411     case CAPI_CMD_SET_CSP_TYPE:
 412         ctx->csptype = i;
 413         break;
 414
 415     default:
 416         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
 417         ret = 0;
 418     }
 419
 420     BIO_free(out);
 421     return ret;
 422
 423 }
 424
 425 static RSA_METHOD capi_rsa_method = {
 426     "CryptoAPI RSA method",
 427     0,                          /* pub_enc */
 428     0,                          /* pub_dec */
 429     capi_rsa_priv_enc,          /* priv_enc */
 430     capi_rsa_priv_dec,          /* priv_dec */
 431     0,                          /* rsa_mod_exp */
 432     0,                          /* bn_mod_exp */
 433     0,                          /* init */
 434     capi_rsa_free,              /* finish */
 435     RSA_FLAG_SIGN_VER,          /* flags */
 436     NULL,                       /* app_data */
 437     capi_rsa_sign,              /* rsa_sign */
 438     0                           /* rsa_verify */
 439 };
 440
 441 static DSA_METHOD capi_dsa_method = {
 442     "CryptoAPI DSA method",
 443     capi_dsa_do_sign,           /* dsa_do_sign */
 444     0,                          /* dsa_sign_setup */
 445     0,                          /* dsa_do_verify */
 446     0,                          /* dsa_mod_exp */
 447     0,                          /* bn_mod_exp */
 448     0,                          /* init */
 449     capi_dsa_free,              /* finish */
 450     0,                          /* flags */
 451     NULL,                       /* app_data */
 452     0,                          /* dsa_paramgen */
 453     0                           /* dsa_keygen */
 454 };
 455
 456 static int capi_init(ENGINE *e)
 457 {
 458     CAPI_CTX *ctx;
 459     const RSA_METHOD *ossl_rsa_meth;
 460     const DSA_METHOD *ossl_dsa_meth;
 461
 462     if (capi_idx < 0) {
 463         capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 464         if (capi_idx < 0)
 465             goto memerr;
 466
 467         cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 468
 469         /* Setup RSA_METHOD */
 470         rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 471         ossl_rsa_meth = RSA_PKCS1_SSLeay();
 472         capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 473         capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 474         capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 475         capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 476
 477         /* Setup DSA Method */
 478         dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 479         ossl_dsa_meth = DSA_OpenSSL();
 480         capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 481         capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 482         capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 483     }
 484
 485     ctx = capi_ctx_new();
 486     if (!ctx)
 487         goto memerr;
 488
 489     ENGINE_set_ex_data(e, capi_idx, ctx);
 490
 491 # ifdef OPENSSL_CAPIENG_DIALOG
 492     {
 493         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 494         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 495         if (cryptui)
 496             ctx->certselectdlg =
 497                 (CERTDLG) GetProcAddress(cryptui,
 498                                          "CryptUIDlgSelectCertificateFromStore");
 499         if (kernel)
 500             ctx->getconswindow =
 501                 (GETCONSWIN) GetProcAddress(kernel, "GetConsoleWindow");
 502         if (cryptui && !OPENSSL_isservice())
 503             ctx->client_cert_select = cert_select_dialog;
 504     }
 505 # endif
 506
 507     return 1;
 508
 509  memerr:
 510     CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 511     return 0;
 512
 513     return 1;
 514 }
 515
 516 static int capi_destroy(ENGINE *e)
 517 {
 518     ERR_unload_CAPI_strings();
 519     return 1;
 520 }
 521
 522 static int capi_finish(ENGINE *e)
 523 {
 524     CAPI_CTX *ctx;
 525     ctx = ENGINE_get_ex_data(e, capi_idx);
 526     capi_ctx_free(ctx);
 527     ENGINE_set_ex_data(e, capi_idx, NULL);
 528     return 1;
 529 }
 530
 531 /*
 532  * CryptoAPI key application data. This contains a handle to the private key
 533  * container (for sign operations) and a handle to the key (for decrypt
 534  * operations).
 535  */
 536
 537 struct CAPI_KEY_st {
 538     /* Associated certificate context (if any) */
 539     PCCERT_CONTEXT pcert;
 540     HCRYPTPROV hprov;
 541     HCRYPTKEY key;
 542     DWORD keyspec;
 543 };
 544
 545 static int bind_capi(ENGINE *e)
 546 {
 547     if (!ENGINE_set_id(e, engine_capi_id)
 548         || !ENGINE_set_name(e, engine_capi_name)
 549         || !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL)
 550         || !ENGINE_set_init_function(e, capi_init)
 551         || !ENGINE_set_finish_function(e, capi_finish)
 552         || !ENGINE_set_destroy_function(e, capi_destroy)
 553         || !ENGINE_set_RSA(e, &capi_rsa_method)
 554         || !ENGINE_set_DSA(e, &capi_dsa_method)
 555         || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 556         || !ENGINE_set_load_ssl_client_cert_function(e,
 557                                                      capi_load_ssl_client_cert)
 558         || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 559         || !ENGINE_set_ctrl_function(e, capi_ctrl))
 560         return 0;
 561     ERR_load_CAPI_strings();
 562
 563     return 1;
 564
 565 }
 566
 567 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
 568 static int bind_helper(ENGINE *e, const char *id)
 569 {
 570     if (id && (strcmp(id, engine_capi_id) != 0))
 571         return 0;
 572     if (!bind_capi(e))
 573         return 0;
 574     return 1;
 575 }
 576
 577 IMPLEMENT_DYNAMIC_CHECK_FN()
 578     IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 579 # else
 580 static ENGINE *engine_capi(void)
 581 {
 582     ENGINE *ret = ENGINE_new();
 583     if (!ret)
 584         return NULL;
 585     if (!bind_capi(ret)) {
 586         ENGINE_free(ret);
 587         return NULL;
 588     }
 589     return ret;
 590 }
 591
 592 void ENGINE_load_capi(void)
 593 {
 594     /* Copied from eng_[openssl|dyn].c */
 595     ENGINE *toadd = engine_capi();
 596     if (!toadd)
 597         return;
 598     ENGINE_add(toadd);
 599     ENGINE_free(toadd);
 600     ERR_clear_error();
 601 }
 602 # endif
 603
 604 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 605 {
 606     int i;
 607     /*
 608      * Reverse buffer in place: since this is a keyblob structure that will
 609      * be freed up after conversion anyway it doesn't matter if we change
 610      * it.
 611      */
 612     for (i = 0; i < binlen / 2; i++) {
 613         unsigned char c;
 614         c = bin[i];
 615         bin[i] = bin[binlen - i - 1];
 616         bin[binlen - i - 1] = c;
 617     }
 618
 619     if (!BN_bin2bn(bin, binlen, bn))
 620         return 0;
 621     return 1;
 622 }
 623
 624 /* Given a CAPI_KEY get an EVP_PKEY structure */
 625
 626 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY * key)
 627 {
 628     unsigned char *pubkey = NULL;
 629     DWORD len;
 630     BLOBHEADER *bh;
 631     RSA *rkey = NULL;
 632     DSA *dkey = NULL;
 633     EVP_PKEY *ret = NULL;
 634     if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len)) {
 635         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 636         capi_addlasterror();
 637         return NULL;
 638     }
 639
 640     pubkey = OPENSSL_malloc(len);
 641
 642     if (!pubkey)
 643         goto memerr;
 644
 645     if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len)) {
 646         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 647         capi_addlasterror();
 648         goto err;
 649     }
 650
 651     bh = (BLOBHEADER *) pubkey;
 652     if (bh->bType != PUBLICKEYBLOB) {
 653         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 654         goto err;
 655     }
 656     if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX) {
 657         RSAPUBKEY *rp;
 658         DWORD rsa_modlen;
 659         unsigned char *rsa_modulus;
 660         rp = (RSAPUBKEY *) (bh + 1);
 661         if (rp->magic != 0x31415352) {
 662             char magstr[10];
 663             BIO_snprintf(magstr, 10, "%lx", rp->magic);
 664             CAPIerr(CAPI_F_CAPI_GET_PKEY,
 665                     CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 666             ERR_add_error_data(2, "magic=0x", magstr);
 667             goto err;
 668         }
 669         rsa_modulus = (unsigned char *)(rp + 1);
 670         rkey = RSA_new_method(eng);
 671         if (!rkey)
 672             goto memerr;
 673
 674         rkey->e = BN_new();
 675         rkey->n = BN_new();
 676
 677         if (!rkey->e || !rkey->n)
 678             goto memerr;
 679
 680         if (!BN_set_word(rkey->e, rp->pubexp))
 681             goto memerr;
 682
 683         rsa_modlen = rp->bitlen / 8;
 684         if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 685             goto memerr;
 686
 687         RSA_set_ex_data(rkey, rsa_capi_idx, key);
 688
 689         if (!(ret = EVP_PKEY_new()))
 690             goto memerr;
 691
 692         EVP_PKEY_assign_RSA(ret, rkey);
 693         rkey = NULL;
 694
 695     } else if (bh->aiKeyAlg == CALG_DSS_SIGN) {
 696         DSSPUBKEY *dp;
 697         DWORD dsa_plen;
 698         unsigned char *btmp;
 699         dp = (DSSPUBKEY *) (bh + 1);
 700         if (dp->magic != 0x31535344) {
 701             char magstr[10];
 702             BIO_snprintf(magstr, 10, "%lx", dp->magic);
 703             CAPIerr(CAPI_F_CAPI_GET_PKEY,
 704                     CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 705             ERR_add_error_data(2, "magic=0x", magstr);
 706             goto err;
 707         }
 708         dsa_plen = dp->bitlen / 8;
 709         btmp = (unsigned char *)(dp + 1);
 710         dkey = DSA_new_method(eng);
 711         if (!dkey)
 712             goto memerr;
 713         dkey->p = BN_new();
 714         dkey->q = BN_new();
 715         dkey->g = BN_new();
 716         dkey->pub_key = BN_new();
 717         if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 718             goto memerr;
 719         if (!lend_tobn(dkey->p, btmp, dsa_plen))
 720             goto memerr;
 721         btmp += dsa_plen;
 722         if (!lend_tobn(dkey->q, btmp, 20))
 723             goto memerr;
 724         btmp += 20;
 725         if (!lend_tobn(dkey->g, btmp, dsa_plen))
 726             goto memerr;
 727         btmp += dsa_plen;
 728         if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 729             goto memerr;
 730         btmp += dsa_plen;
 731
 732         DSA_set_ex_data(dkey, dsa_capi_idx, key);
 733
 734         if (!(ret = EVP_PKEY_new()))
 735             goto memerr;
 736
 737         EVP_PKEY_assign_DSA(ret, dkey);
 738         dkey = NULL;
 739     } else {
 740         char algstr[10];
 741         BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 742         CAPIerr(CAPI_F_CAPI_GET_PKEY,
 743                 CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 744         ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 745         goto err;
 746     }
 747
 748  err:
 749     if (pubkey)
 750         OPENSSL_free(pubkey);
 751     if (!ret) {
 752         if (rkey)
 753             RSA_free(rkey);
 754         if (dkey)
 755             DSA_free(dkey);
 756     }
 757
 758     return ret;
 759
 760  memerr:
 761     CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 762     goto err;
 763
 764 }
 765
 766 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 767                                    UI_METHOD *ui_method, void *callback_data)
 768 {
 769     CAPI_CTX *ctx;
 770     CAPI_KEY *key;
 771     EVP_PKEY *ret;
 772     ctx = ENGINE_get_ex_data(eng, capi_idx);
 773
 774     if (!ctx) {
 775         CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 776         return NULL;
 777     }
 778
 779     key = capi_find_key(ctx, key_id);
 780
 781     if (!key)
 782         return NULL;
 783
 784     ret = capi_get_pkey(eng, key);
 785
 786     if (!ret)
 787         capi_free_key(key);
 788     return ret;
 789
 790 }
 791
 792 /* CryptoAPI RSA operations */
 793
 794 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 795                       unsigned char *to, RSA *rsa, int padding)
 796 {
 797     CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 798     return -1;
 799 }
 800
 801 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 802                   unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 803 {
 804     ALG_ID alg;
 805     HCRYPTHASH hash;
 806     DWORD slen;
 807     unsigned int i;
 808     int ret = -1;
 809     CAPI_KEY *capi_key;
 810     CAPI_CTX *ctx;
 811
 812     ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 813
 814     CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 815
 816     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 817     if (!capi_key) {
 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     case NID_sha256:
 824         alg = CALG_SHA_256;
 825         break;
 826
 827     case NID_sha384:
 828         alg = CALG_SHA_384;
 829         break;
 830
 831     case NID_sha512:
 832         alg = CALG_SHA_512;
 833         break;
 834
 835     case NID_sha1:
 836         alg = CALG_SHA1;
 837         break;
 838
 839     case NID_md5:
 840         alg = CALG_MD5;
 841         break;
 842
 843     case NID_md5_sha1:
 844         alg = CALG_SSL3_SHAMD5;
 845         break;
 846     default:
 847         {
 848             char algstr[10];
 849             BIO_snprintf(algstr, 10, "%lx", dtype);
 850             CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 851             ERR_add_error_data(2, "NID=0x", algstr);
 852             return -1;
 853         }
 854     }
 855
 856 /* Create the hash object */
 857     if (!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash)) {
 858         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 859         capi_addlasterror();
 860         return -1;
 861     }
 862 /* Set the hash value to the value passed */
 863
 864     if (!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0)) {
 865         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 866         capi_addlasterror();
 867         goto err;
 868     }
 869
 870 /* Finally sign it */
 871     slen = RSA_size(rsa);
 872     if (!CryptSignHash(hash, capi_key->keyspec, NULL, 0, sigret, &slen)) {
 873         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 874         capi_addlasterror();
 875         goto err;
 876     } else {
 877         ret = 1;
 878         /* Inplace byte reversal of signature */
 879         for (i = 0; i < slen / 2; i++) {
 880             unsigned char c;
 881             c = sigret[i];
 882             sigret[i] = sigret[slen - i - 1];
 883             sigret[slen - i - 1] = c;
 884         }
 885         *siglen = slen;
 886     }
 887
 888     /* Now cleanup */
 889
 890  err:
 891     CryptDestroyHash(hash);
 892
 893     return ret;
 894 }
 895
 896 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 897                       unsigned char *to, RSA *rsa, int padding)
 898 {
 899     int i;
 900     unsigned char *tmpbuf;
 901     CAPI_KEY *capi_key;
 902     CAPI_CTX *ctx;
 903     DWORD flags = 0;
 904
 905     ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 906
 907     CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 908
 909     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 910     if (!capi_key) {
 911         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 912         return -1;
 913     }
 914
 915     switch (padding) {
 916     case RSA_PKCS1_PADDING:
 917         /* Nothing to do */
 918         break;
 919 #ifdef CRYPT_DECRYPT_RSA_NO_PADDING_CHECK
 920     case RSA_NO_PADDING:
 921         flags = CRYPT_DECRYPT_RSA_NO_PADDING_CHECK;
 922         break;
 923 #endif
 924     default:
 925         {
 926             char errstr[10];
 927             BIO_snprintf(errstr, 10, "%d", padding);
 928             CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 929             ERR_add_error_data(2, "padding=", errstr);
 930             return -1;
 931         }
 932     }
 933
 934     /* Create temp reverse order version of input */
 935     if (!(tmpbuf = OPENSSL_malloc(flen))) {
 936         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 937         return -1;
 938     }
 939     for (i = 0; i < flen; i++)
 940         tmpbuf[flen - i - 1] = from[i];
 941
 942     /* Finally decrypt it */
 943     if (!CryptDecrypt(capi_key->key, 0, TRUE, flags, tmpbuf, &flen)) {
 944         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 945         capi_addlasterror();
 946         OPENSSL_cleanse(tmpbuf, flen);
 947         OPENSSL_free(tmpbuf);
 948         return -1;
 949     } else {
 950         memcpy(to, tmpbuf, flen);
 951     }
 952
 953     OPENSSL_cleanse(tmpbuf, flen);
 954     OPENSSL_free(tmpbuf);
 955
 956     return flen;
 957 }
 958
 959 static int capi_rsa_free(RSA *rsa)
 960 {
 961     CAPI_KEY *capi_key;
 962     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 963     capi_free_key(capi_key);
 964     RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 965     return 1;
 966 }
 967
 968 /* CryptoAPI DSA operations */
 969
 970 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 971                                  DSA *dsa)
 972 {
 973     HCRYPTHASH hash;
 974     DWORD slen;
 975     DSA_SIG *ret = NULL;
 976     CAPI_KEY *capi_key;
 977     CAPI_CTX *ctx;
 978     unsigned char csigbuf[40];
 979
 980     ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 981
 982     CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 983
 984     capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 985
 986     if (!capi_key) {
 987         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 988         return NULL;
 989     }
 990
 991     if (dlen != 20) {
 992         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 993         return NULL;
 994     }
 995
 996     /* Create the hash object */
 997     if (!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash)) {
 998         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 999         capi_addlasterror();
1000         return NULL;
1001     }
1002
1003     /* Set the hash value to the value passed */
1004     if (!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0)) {
1005         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
1006         capi_addlasterror();
1007         goto err;
1008     }
1009
1010     /* Finally sign it */
1011     slen = sizeof(csigbuf);
1012     if (!CryptSignHash(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen)) {
1013         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
1014         capi_addlasterror();
1015         goto err;
1016     } else {
1017         ret = DSA_SIG_new();
1018         if (!ret)
1019             goto err;
1020         ret->r = BN_new();
1021         ret->s = BN_new();
1022         if (!ret->r || !ret->s)
1023             goto err;
1024         if (!lend_tobn(ret->r, csigbuf, 20)
1025             || !lend_tobn(ret->s, csigbuf + 20, 20)) {
1026             DSA_SIG_free(ret);
1027             ret = NULL;
1028             goto err;
1029         }
1030     }
1031
1032     /* Now cleanup */
1033
1034  err:
1035     OPENSSL_cleanse(csigbuf, 40);
1036     CryptDestroyHash(hash);
1037     return ret;
1038 }
1039
1040 static int capi_dsa_free(DSA *dsa)
1041 {
1042     CAPI_KEY *capi_key;
1043     capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1044     capi_free_key(capi_key);
1045     DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1046     return 1;
1047 }
1048
1049 static void capi_vtrace(CAPI_CTX * ctx, int level, char *format,
1050                         va_list argptr)
1051 {
1052     BIO *out;
1053
1054     if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1055         return;
1056     out = BIO_new_file(ctx->debug_file, "a+");
1057     BIO_vprintf(out, format, argptr);
1058     BIO_free(out);
1059 }
1060
1061 static void CAPI_trace(CAPI_CTX * ctx, char *format, ...)
1062 {
1063     va_list args;
1064     va_start(args, format);
1065     capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1066     va_end(args);
1067 }
1068
1069 static void capi_addlasterror(void)
1070 {
1071     capi_adderror(GetLastError());
1072 }
1073
1074 static void capi_adderror(DWORD err)
1075 {
1076     char errstr[10];
1077     BIO_snprintf(errstr, 10, "%lX", err);
1078     ERR_add_error_data(2, "Error code= 0x", errstr);
1079 }
1080
1081 static char *wide_to_asc(LPCWSTR wstr)
1082 {
1083     char *str;
1084     int len_0, sz;
1085
1086     if (!wstr)
1087         return NULL;
1088     len_0 = (int)wcslen(wstr) + 1; /* WideCharToMultiByte expects int */
1089     sz = WideCharToMultiByte(CP_ACP, 0, wstr, len_0, NULL, 0, NULL, NULL);
1090     if (!sz) {
1091         CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1092         return NULL;
1093     }
1094     str = OPENSSL_malloc(sz);
1095     if (!str) {
1096         CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1097         return NULL;
1098     }
1099     if (!WideCharToMultiByte(CP_ACP, 0, wstr, len_0, str, sz, NULL, NULL)) {
1100         OPENSSL_free(str);
1101         CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1102         return NULL;
1103     }
1104     return str;
1105 }
1106
1107 static int capi_get_provname(CAPI_CTX * ctx, LPSTR * pname, DWORD * ptype,
1108                              DWORD idx)
1109 {
1110     DWORD len, err;
1111     LPTSTR name;
1112     CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1113     if (!CryptEnumProviders(idx, NULL, 0, ptype, NULL, &len)) {
1114         err = GetLastError();
1115         if (err == ERROR_NO_MORE_ITEMS)
1116             return 2;
1117         CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1118         capi_adderror(err);
1119         return 0;
1120     }
1121     if (sizeof(TCHAR) != sizeof(char))
1122         name = alloca(len);
1123     else
1124         name = OPENSSL_malloc(len);
1125     if (name == NULL) {
1126         CAPIerr(CAPI_F_CAPI_GET_PROVNAME, ERR_R_MALLOC_FAILURE);
1127         return 0;
1128     }
1129     if (!CryptEnumProviders(idx, NULL, 0, ptype, name, &len)) {
1130         err = GetLastError();
1131         if (err == ERROR_NO_MORE_ITEMS)
1132             return 2;
1133         CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1134         capi_adderror(err);
1135         return 0;
1136     }
1137     if (sizeof(TCHAR) != sizeof(char))
1138         *pname = wide_to_asc((WCHAR *)name);
1139     else
1140         *pname = (char *)name;
1141     CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", *pname,
1142                *ptype);
1143
1144     return 1;
1145 }
1146
1147 static int capi_list_providers(CAPI_CTX * ctx, BIO *out)
1148 {
1149     DWORD idx, ptype;
1150     int ret;
1151     LPSTR provname = NULL;
1152     CAPI_trace(ctx, "capi_list_providers\n");
1153     BIO_printf(out, "Available CSPs:\n");
1154     for (idx = 0;; idx++) {
1155         ret = capi_get_provname(ctx, &provname, &ptype, idx);
1156         if (ret == 2)
1157             break;
1158         if (ret == 0)
1159             break;
1160         BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1161         OPENSSL_free(provname);
1162     }
1163     return 1;
1164 }
1165
1166 static int capi_list_containers(CAPI_CTX * ctx, BIO *out)
1167 {
1168     int ret = 1;
1169     HCRYPTPROV hprov;
1170     DWORD err, idx, flags, buflen = 0, clen;
1171     LPSTR cname;
1172     LPTSTR cspname = NULL;
1173
1174     CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname,
1175                ctx->csptype);
1176     if (ctx->cspname && sizeof(TCHAR) != sizeof(char)) {
1177         if ((clen =
1178              MultiByteToWideChar(CP_ACP, 0, ctx->cspname, -1, NULL, 0))) {
1179             cspname = alloca(clen * sizeof(WCHAR));
1180             MultiByteToWideChar(CP_ACP, 0, ctx->cspname, -1, (WCHAR *)cspname,
1181                                 clen);
1182         }
1183         if (!cspname) {
1184             CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1185             capi_addlasterror();
1186             return 0;
1187         }
1188     } else
1189         cspname = (TCHAR *)ctx->cspname;
1190     if (!CryptAcquireContext
1191         (&hprov, NULL, cspname, ctx->csptype, CRYPT_VERIFYCONTEXT)) {
1192         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS,
1193                 CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1194         capi_addlasterror();
1195         return 0;
1196     }
1197     if (!CryptGetProvParam
1198         (hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST)) {
1199         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1200         capi_addlasterror();
1201         CryptReleaseContext(hprov, 0);
1202         return 0;
1203     }
1204     CAPI_trace(ctx, "Got max container len %d\n", buflen);
1205     if (buflen == 0)
1206         buflen = 1024;
1207     cname = OPENSSL_malloc(buflen);
1208     if (!cname) {
1209         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1210         goto err;
1211     }
1212
1213     for (idx = 0;; idx++) {
1214         clen = buflen;
1215         cname[0] = 0;
1216
1217         if (idx == 0)
1218             flags = CRYPT_FIRST;
1219         else
1220             flags = 0;
1221         if (!CryptGetProvParam
1222             (hprov, PP_ENUMCONTAINERS, (BYTE *) cname, &clen, flags)) {
1223             err = GetLastError();
1224             if (err == ERROR_NO_MORE_ITEMS)
1225                 goto done;
1226             CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1227             capi_adderror(err);
1228             goto err;
1229         }
1230         CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n",
1231                    cname, clen, idx, flags);
1232         if (!cname[0] && (clen == buflen)) {
1233             CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1234             goto done;
1235         }
1236         BIO_printf(out, "%d. %s\n", idx, cname);
1237     }
1238  err:
1239
1240     ret = 0;
1241
1242  done:
1243     if (cname)
1244         OPENSSL_free(cname);
1245     CryptReleaseContext(hprov, 0);
1246
1247     return ret;
1248 }
1249
1250 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1251 {
1252     DWORD len;
1253     CRYPT_KEY_PROV_INFO *pinfo;
1254
1255     if (!CertGetCertificateContextProperty
1256         (cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1257         return NULL;
1258     pinfo = OPENSSL_malloc(len);
1259     if (!pinfo) {
1260         CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1261         return NULL;
1262     }
1263     if (!CertGetCertificateContextProperty
1264         (cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len)) {
1265         CAPIerr(CAPI_F_CAPI_GET_PROV_INFO,
1266                 CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1267         capi_addlasterror();
1268         OPENSSL_free(pinfo);
1269         return NULL;
1270     }
1271     return pinfo;
1272 }
1273
1274 static void capi_dump_prov_info(CAPI_CTX * ctx, BIO *out,
1275                                 CRYPT_KEY_PROV_INFO * pinfo)
1276 {
1277     char *provname = NULL, *contname = NULL;
1278     if (!pinfo) {
1279         BIO_printf(out, "  No Private Key\n");
1280         return;
1281     }
1282     provname = wide_to_asc(pinfo->pwszProvName);
1283     contname = wide_to_asc(pinfo->pwszContainerName);
1284     if (!provname || !contname)
1285         goto err;
1286
1287     BIO_printf(out, "  Private Key Info:\n");
1288     BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname,
1289                pinfo->dwProvType);
1290     BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname,
1291                pinfo->dwKeySpec);
1292  err:
1293     if (provname)
1294         OPENSSL_free(provname);
1295     if (contname)
1296         OPENSSL_free(contname);
1297 }
1298
1299 char *capi_cert_get_fname(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1300 {
1301     LPWSTR wfname;
1302     DWORD dlen;
1303
1304     CAPI_trace(ctx, "capi_cert_get_fname\n");
1305     if (!CertGetCertificateContextProperty
1306         (cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1307         return NULL;
1308     wfname = OPENSSL_malloc(dlen);
1309     if (wfname == NULL) {
1310         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, ERR_R_MALLOC_FAILURE);
1311         return NULL;
1312     }
1313     if (CertGetCertificateContextProperty
1314         (cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen)) {
1315         char *fname = wide_to_asc(wfname);
1316         OPENSSL_free(wfname);
1317         return fname;
1318     }
1319     CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1320     capi_addlasterror();
1321
1322     OPENSSL_free(wfname);
1323     return NULL;
1324 }
1325
1326 void capi_dump_cert(CAPI_CTX * ctx, BIO *out, PCCERT_CONTEXT cert)
1327 {
1328     X509 *x;
1329     unsigned char *p;
1330     unsigned long flags = ctx->dump_flags;
1331     if (flags & CAPI_DMP_FNAME) {
1332         char *fname;
1333         fname = capi_cert_get_fname(ctx, cert);
1334         if (fname) {
1335             BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1336             OPENSSL_free(fname);
1337         } else
1338             BIO_printf(out, "  <No Friendly Name>\n");
1339     }
1340
1341     p = cert->pbCertEncoded;
1342     x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1343     if (!x)
1344         BIO_printf(out, "  <Can't parse certificate>\n");
1345     if (flags & CAPI_DMP_SUMMARY) {
1346         BIO_printf(out, "  Subject: ");
1347         X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1348         BIO_printf(out, "\n  Issuer: ");
1349         X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1350         BIO_printf(out, "\n");
1351     }
1352     if (flags & CAPI_DMP_FULL)
1353         X509_print_ex(out, x, XN_FLAG_ONELINE, 0);
1354
1355     if (flags & CAPI_DMP_PKEYINFO) {
1356         CRYPT_KEY_PROV_INFO *pinfo;
1357         pinfo = capi_get_prov_info(ctx, cert);
1358         capi_dump_prov_info(ctx, out, pinfo);
1359         if (pinfo)
1360             OPENSSL_free(pinfo);
1361     }
1362
1363     if (flags & CAPI_DMP_PEM)
1364         PEM_write_bio_X509(out, x);
1365     X509_free(x);
1366 }
1367
1368 HCERTSTORE capi_open_store(CAPI_CTX * ctx, char *storename)
1369 {
1370     HCERTSTORE hstore;
1371
1372     if (!storename)
1373         storename = ctx->storename;
1374     if (!storename)
1375         storename = "MY";
1376     CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1377
1378     hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1379                            ctx->store_flags, storename);
1380     if (!hstore) {
1381         CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1382         capi_addlasterror();
1383     }
1384     return hstore;
1385 }
1386
1387 int capi_list_certs(CAPI_CTX * ctx, BIO *out, char *id)
1388 {
1389     char *storename;
1390     int idx;
1391     int ret = 1;
1392     HCERTSTORE hstore;
1393     PCCERT_CONTEXT cert = NULL;
1394
1395     storename = ctx->storename;
1396     if (!storename)
1397         storename = "MY";
1398     CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1399
1400     hstore = capi_open_store(ctx, storename);
1401     if (!hstore)
1402         return 0;
1403     if (id) {
1404         cert = capi_find_cert(ctx, id, hstore);
1405         if (!cert) {
1406             ret = 0;
1407             goto err;
1408         }
1409         capi_dump_cert(ctx, out, cert);
1410         CertFreeCertificateContext(cert);
1411     } else {
1412         for (idx = 0;; idx++) {
1413             cert = CertEnumCertificatesInStore(hstore, cert);
1414             if (!cert)
1415                 break;
1416             BIO_printf(out, "Certificate %d\n", idx);
1417             capi_dump_cert(ctx, out, cert);
1418         }
1419     }
1420  err:
1421     CertCloseStore(hstore, 0);
1422     return ret;
1423 }
1424
1425 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX * ctx, const char *id,
1426                                      HCERTSTORE hstore)
1427 {
1428     PCCERT_CONTEXT cert = NULL;
1429     char *fname = NULL;
1430     int match;
1431     switch (ctx->lookup_method) {
1432     case CAPI_LU_SUBSTR:
1433         return CertFindCertificateInStore(hstore,
1434                                           X509_ASN_ENCODING, 0,
1435                                           CERT_FIND_SUBJECT_STR_A, id, NULL);
1436     case CAPI_LU_FNAME:
1437         for (;;) {
1438             cert = CertEnumCertificatesInStore(hstore, cert);
1439             if (!cert)
1440                 return NULL;
1441             fname = capi_cert_get_fname(ctx, cert);
1442             if (fname) {
1443                 if (strcmp(fname, id))
1444                     match = 0;
1445                 else
1446                     match = 1;
1447                 OPENSSL_free(fname);
1448                 if (match)
1449                     return cert;
1450             }
1451         }
1452     default:
1453         return NULL;
1454     }
1455 }
1456
1457 static CAPI_KEY *capi_get_key(CAPI_CTX * ctx, const TCHAR *contname,
1458                               TCHAR *provname, DWORD ptype, DWORD keyspec)
1459 {
1460     CAPI_KEY *key;
1461     DWORD dwFlags = 0;
1462     key = OPENSSL_malloc(sizeof(CAPI_KEY));
1463     if (key == NULL) {
1464         CAPIerr(CAPI_F_CAPI_GET_KEY, ERR_R_MALLOC_FAILURE);
1465         capi_addlasterror();
1466         goto err;
1467     }
1468     if (sizeof(TCHAR) == sizeof(char))
1469         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1470                    contname, provname, ptype);
1471     else if (ctx && ctx->debug_level >= CAPI_DBG_TRACE && ctx->debug_file) {
1472         /* above 'if' is optimization to minimize malloc-ations */
1473         char *_contname = wide_to_asc((WCHAR *)contname);
1474         char *_provname = wide_to_asc((WCHAR *)provname);
1475
1476         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1477                    _contname, _provname, ptype);
1478         if (_provname)
1479             OPENSSL_free(_provname);
1480         if (_contname)
1481             OPENSSL_free(_contname);
1482     }
1483     if (ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
1484         dwFlags = CRYPT_MACHINE_KEYSET;
1485     if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, dwFlags)) {
1486         CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1487         capi_addlasterror();
1488         goto err;
1489     }
1490     if (!CryptGetUserKey(key->hprov, keyspec, &key->key)) {
1491         CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1492         capi_addlasterror();
1493         CryptReleaseContext(key->hprov, 0);
1494         goto err;
1495     }
1496     key->keyspec = keyspec;
1497     key->pcert = NULL;
1498     return key;
1499
1500  err:
1501     OPENSSL_free(key);
1502     return NULL;
1503 }
1504
1505 static CAPI_KEY *capi_get_cert_key(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1506 {
1507     CAPI_KEY *key = NULL;
1508     CRYPT_KEY_PROV_INFO *pinfo = NULL;
1509     char *provname = NULL, *contname = NULL;
1510     pinfo = capi_get_prov_info(ctx, cert);
1511     if (!pinfo)
1512         goto err;
1513     if (sizeof(TCHAR) != sizeof(char))
1514         key = capi_get_key(ctx, (TCHAR *)pinfo->pwszContainerName,
1515                            (TCHAR *)pinfo->pwszProvName,
1516                            pinfo->dwProvType, pinfo->dwKeySpec);
1517     else {
1518         provname = wide_to_asc(pinfo->pwszProvName);
1519         contname = wide_to_asc(pinfo->pwszContainerName);
1520         if (!provname || !contname)
1521             goto err;
1522         key = capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
1523                            pinfo->dwProvType, pinfo->dwKeySpec);
1524     }
1525
1526  err:
1527     if (pinfo)
1528         OPENSSL_free(pinfo);
1529     if (provname)
1530         OPENSSL_free(provname);
1531     if (contname)
1532         OPENSSL_free(contname);
1533     return key;
1534 }
1535
1536 CAPI_KEY *capi_find_key(CAPI_CTX * ctx, const char *id)
1537 {
1538     PCCERT_CONTEXT cert;
1539     HCERTSTORE hstore;
1540     CAPI_KEY *key = NULL;
1541     switch (ctx->lookup_method) {
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             key = capi_get_cert_key(ctx, cert);
1550             CertFreeCertificateContext(cert);
1551         }
1552         CertCloseStore(hstore, 0);
1553         break;
1554
1555     case CAPI_LU_CONTNAME:
1556         if (sizeof(TCHAR) != sizeof(char)) {
1557             WCHAR *contname, *provname;
1558             DWORD len;
1559
1560             if ((len = MultiByteToWideChar(CP_ACP, 0, id, -1, NULL, 0)) &&
1561                 (contname = alloca(len * sizeof(WCHAR)),
1562                  MultiByteToWideChar(CP_ACP, 0, id, -1, contname, len)) &&
1563                 (len =
1564                  MultiByteToWideChar(CP_ACP, 0, ctx->cspname, -1, NULL, 0))
1565                 && (provname =
1566                     alloca(len * sizeof(WCHAR)), MultiByteToWideChar(CP_ACP,
1567                                                                      0,
1568                                                                      ctx->cspname,
1569                                                                      -1,
1570                                                                      provname,
1571                                                                      len)))
1572                 key =
1573                     capi_get_key(ctx, (TCHAR *)contname, (TCHAR *)provname,
1574                                  ctx->csptype, ctx->keytype);
1575         } else
1576             key = capi_get_key(ctx, (TCHAR *)id,
1577                                (TCHAR *)ctx->cspname,
1578                                ctx->csptype, ctx->keytype);
1579         break;
1580     }
1581
1582     return key;
1583 }
1584
1585 void capi_free_key(CAPI_KEY * key)
1586 {
1587     if (!key)
1588         return;
1589     CryptDestroyKey(key->key);
1590     CryptReleaseContext(key->hprov, 0);
1591     if (key->pcert)
1592         CertFreeCertificateContext(key->pcert);
1593     OPENSSL_free(key);
1594 }
1595
1596 /* Initialize a CAPI_CTX structure */
1597
1598 static CAPI_CTX *capi_ctx_new()
1599 {
1600     CAPI_CTX *ctx;
1601     ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1602     if (!ctx) {
1603         CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1604         return NULL;
1605     }
1606     ctx->cspname = NULL;
1607     ctx->csptype = PROV_RSA_FULL;
1608     ctx->dump_flags = CAPI_DMP_SUMMARY | CAPI_DMP_FNAME;
1609     ctx->keytype = AT_KEYEXCHANGE;
1610     ctx->storename = NULL;
1611     ctx->ssl_client_store = NULL;
1612     ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1613         CERT_STORE_READONLY_FLAG | 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,
1638                                  int check)
1639 {
1640     CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1641     if (check) {
1642         HCRYPTPROV hprov;
1643         LPTSTR name = NULL;
1644
1645         if (sizeof(TCHAR) != sizeof(char)) {
1646             DWORD len;
1647             if ((len = MultiByteToWideChar(CP_ACP, 0, pname, -1, NULL, 0))) {
1648                 name = alloca(len * sizeof(WCHAR));
1649                 MultiByteToWideChar(CP_ACP, 0, pname, -1, (WCHAR *)name, len);
1650             }
1651         } else
1652             name = (TCHAR *)pname;
1653
1654         if (!name || !CryptAcquireContext(&hprov, NULL, name, type,
1655                                           CRYPT_VERIFYCONTEXT)) {
1656             CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME,
1657                     CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1658             capi_addlasterror();
1659             return 0;
1660         }
1661         CryptReleaseContext(hprov, 0);
1662     }
1663     if (ctx->cspname)
1664         OPENSSL_free(ctx->cspname);
1665     ctx->cspname = BUF_strdup(pname);
1666     ctx->csptype = type;
1667     return 1;
1668 }
1669
1670 static int capi_ctx_set_provname_idx(CAPI_CTX * ctx, int idx)
1671 {
1672     LPSTR pname;
1673     DWORD type;
1674     int res;
1675     if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1676         return 0;
1677     res = capi_ctx_set_provname(ctx, pname, type, 0);
1678     OPENSSL_free(pname);
1679     return res;
1680 }
1681
1682 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1683 {
1684     int i;
1685     X509_NAME *nm;
1686     /* Special case: empty list: match anything */
1687     if (sk_X509_NAME_num(ca_dn) <= 0)
1688         return 1;
1689     for (i = 0; i < sk_X509_NAME_num(ca_dn); i++) {
1690         nm = sk_X509_NAME_value(ca_dn, i);
1691         if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1692             return 1;
1693     }
1694     return 0;
1695 }
1696
1697 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1698                                      STACK_OF(X509_NAME) *ca_dn, X509 **pcert,
1699                                      EVP_PKEY **pkey, STACK_OF(X509) **pother,
1700                                      UI_METHOD *ui_method,
1701                                      void *callback_data)
1702 {
1703     STACK_OF(X509) *certs = NULL;
1704     X509 *x;
1705     char *storename;
1706     const char *p;
1707     int i, client_cert_idx;
1708     HCERTSTORE hstore;
1709     PCCERT_CONTEXT cert = NULL, excert = NULL;
1710     CAPI_CTX *ctx;
1711     CAPI_KEY *key;
1712     ctx = ENGINE_get_ex_data(e, capi_idx);
1713
1714     *pcert = NULL;
1715     *pkey = NULL;
1716
1717     storename = ctx->ssl_client_store;
1718     if (!storename)
1719         storename = "MY";
1720
1721     hstore = capi_open_store(ctx, storename);
1722     if (!hstore)
1723         return 0;
1724     /* Enumerate all certificates collect any matches */
1725     for (i = 0;; i++) {
1726         cert = CertEnumCertificatesInStore(hstore, cert);
1727         if (!cert)
1728             break;
1729         p = cert->pbCertEncoded;
1730         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1731         if (!x) {
1732             CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1733             continue;
1734         }
1735         if (cert_issuer_match(ca_dn, x)
1736             && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0)) {
1737             key = capi_get_cert_key(ctx, cert);
1738             if (!key) {
1739                 X509_free(x);
1740                 continue;
1741             }
1742             /*
1743              * Match found: attach extra data to it so we can retrieve the
1744              * key later.
1745              */
1746             excert = CertDuplicateCertificateContext(cert);
1747             key->pcert = excert;
1748             X509_set_ex_data(x, cert_capi_idx, key);
1749
1750             if (!certs)
1751                 certs = sk_X509_new_null();
1752
1753             sk_X509_push(certs, x);
1754         } else
1755             X509_free(x);
1756
1757     }
1758
1759     if (cert)
1760         CertFreeCertificateContext(cert);
1761     if (hstore)
1762         CertCloseStore(hstore, 0);
1763
1764     if (!certs)
1765         return 0;
1766
1767     /* Select the appropriate certificate */
1768
1769     client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1770
1771     /* Set the selected certificate and free the rest */
1772
1773     for (i = 0; i < sk_X509_num(certs); i++) {
1774         x = sk_X509_value(certs, i);
1775         if (i == client_cert_idx)
1776             *pcert = x;
1777         else {
1778             key = X509_get_ex_data(x, cert_capi_idx);
1779             capi_free_key(key);
1780             X509_free(x);
1781         }
1782     }
1783
1784     sk_X509_free(certs);
1785
1786     if (!*pcert)
1787         return 0;
1788
1789     /* Setup key for selected certificate */
1790
1791     key = X509_get_ex_data(*pcert, cert_capi_idx);
1792     *pkey = capi_get_pkey(e, key);
1793     X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1794
1795     return 1;
1796
1797 }
1798
1799 /* Simple client cert selection function: always select first */
1800
1801 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1802 {
1803     return 0;
1804 }
1805
1806 # ifdef OPENSSL_CAPIENG_DIALOG
1807
1808 /*
1809  * More complex cert selection function, using standard function
1810  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1811  */
1812
1813 /*
1814  * Definitions which are in cryptuiapi.h but this is not present in older
1815  * versions of headers.
1816  */
1817
1818 #  ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1819 #   define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1820 #   define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1821 #  endif
1822
1823 #  define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1824 #  define dlg_prompt L"Select a certificate to use for authentication"
1825 #  define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1826                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1827
1828 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1829 {
1830     X509 *x;
1831     HCERTSTORE dstore;
1832     PCCERT_CONTEXT cert;
1833     CAPI_CTX *ctx;
1834     CAPI_KEY *key;
1835     HWND hwnd;
1836     int i, idx = -1;
1837     if (sk_X509_num(certs) == 1)
1838         return 0;
1839     ctx = ENGINE_get_ex_data(e, capi_idx);
1840     /* Create an in memory store of certificates */
1841     dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1842                            CERT_STORE_CREATE_NEW_FLAG, NULL);
1843     if (!dstore) {
1844         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1845         capi_addlasterror();
1846         goto err;
1847     }
1848     /* Add all certificates to store */
1849     for (i = 0; i < sk_X509_num(certs); i++) {
1850         x = sk_X509_value(certs, i);
1851         key = X509_get_ex_data(x, cert_capi_idx);
1852
1853         if (!CertAddCertificateContextToStore(dstore, key->pcert,
1854                                               CERT_STORE_ADD_NEW, NULL)) {
1855             CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1856             capi_addlasterror();
1857             goto err;
1858         }
1859
1860     }
1861     hwnd = GetForegroundWindow();
1862     if (!hwnd)
1863         hwnd = GetActiveWindow();
1864     if (!hwnd && ctx->getconswindow)
1865         hwnd = ctx->getconswindow();
1866     /* Call dialog to select one */
1867     cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1868                               dlg_columns, 0, NULL);
1869
1870     /* Find matching cert from list */
1871     if (cert) {
1872         for (i = 0; i < sk_X509_num(certs); i++) {
1873             x = sk_X509_value(certs, i);
1874             key = X509_get_ex_data(x, cert_capi_idx);
1875             if (CertCompareCertificate
1876                 (X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, cert->pCertInfo,
1877                  key->pcert->pCertInfo)) {
1878                 idx = i;
1879                 break;
1880             }
1881         }
1882     }
1883
1884  err:
1885     if (dstore)
1886         CertCloseStore(dstore, 0);
1887     return idx;
1888
1889 }
1890 # endif
1891
1892 #else                           /* !__COMPILE_CAPIENG */
1893 # include <openssl/engine.h>
1894 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
1895 OPENSSL_EXPORT
1896     int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
1897 OPENSSL_EXPORT
1898     int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns)
1899 {
1900     return 0;
1901 }
1902
1903 IMPLEMENT_DYNAMIC_CHECK_FN()
1904 # else
1905 void ENGINE_load_capi(void)
1906 {
1907 }
1908 # endif
1909 #endif