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 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 <openssl/crypto.h>
  58 #include <openssl/buffer.h>
  59 #include <openssl/bn.h>
  60
  61 #ifdef OPENSSL_SYS_WIN32
  62 # ifndef OPENSSL_NO_CAPIENG
  63
  64 #  include <openssl/rsa.h>
  65
  66 #  include <windows.h>
  67
  68 #  ifndef _WIN32_WINNT
  69 #   define _WIN32_WINNT 0x0400
  70 #  endif
  71
  72 #  include <wincrypt.h>
  73
  74 #  undef X509_EXTENSIONS
  75 #  undef X509_CERT_PAIR
  76
  77 /* Definitions which may be missing from earlier version of headers */
  78 #  ifndef CERT_STORE_OPEN_EXISTING_FLAG
  79 #   define CERT_STORE_OPEN_EXISTING_FLAG                   0x00004000
  80 #  endif
  81
  82 #  ifndef CERT_STORE_CREATE_NEW_FLAG
  83 #   define CERT_STORE_CREATE_NEW_FLAG                      0x00002000
  84 #  endif
  85
  86 #  ifndef CERT_SYSTEM_STORE_CURRENT_USER
  87 #   define CERT_SYSTEM_STORE_CURRENT_USER                  0x00010000
  88 #  endif
  89
  90 #  include <openssl/engine.h>
  91 #  include <openssl/pem.h>
  92 #  include <openssl/x509v3.h>
  93
  94 #  include "e_capi_err.h"
  95 #  include "e_capi_err.c"
  96
  97 static const char *engine_capi_id = "capi";
  98 static const char *engine_capi_name = "CryptoAPI ENGINE";
  99
 100 typedef struct CAPI_CTX_st CAPI_CTX;
 101 typedef struct CAPI_KEY_st CAPI_KEY;
 102
 103 static void capi_addlasterror(void);
 104 static void capi_adderror(DWORD err);
 105
 106 static void CAPI_trace(CAPI_CTX * ctx, char *format, ...);
 107
 108 static int capi_list_providers(CAPI_CTX * ctx, BIO *out);
 109 static int capi_list_containers(CAPI_CTX * ctx, BIO *out);
 110 int capi_list_certs(CAPI_CTX * ctx, BIO *out, char *storename);
 111 void capi_free_key(CAPI_KEY * key);
 112
 113 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX * ctx, const char *id,
 114                                      HCERTSTORE hstore);
 115
 116 CAPI_KEY *capi_find_key(CAPI_CTX * ctx, const char *id);
 117
 118 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 119                                    UI_METHOD *ui_method, void *callback_data);
 120 static int capi_rsa_sign(int dtype, const unsigned char *m,
 121                          unsigned int m_len, unsigned char *sigret,
 122                          unsigned int *siglen, const RSA *rsa);
 123 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
 124                              unsigned char *to, RSA *rsa, int padding);
 125 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
 126                              unsigned char *to, RSA *rsa, int padding);
 127 static int capi_rsa_free(RSA *rsa);
 128
 129 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 130                                  DSA *dsa);
 131 static int capi_dsa_free(DSA *dsa);
 132
 133 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
 134                                      STACK_OF(X509_NAME) *ca_dn, X509 **pcert,
 135                                      EVP_PKEY **pkey, STACK_OF(X509) **pother,
 136                                      UI_METHOD *ui_method,
 137                                      void *callback_data);
 138
 139 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 140 #  ifdef OPENSSL_CAPIENG_DIALOG
 141 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 142 #  endif
 143
 144 typedef PCCERT_CONTEXT(WINAPI *CERTDLG) (HCERTSTORE, HWND, LPCWSTR,
 145                                          LPCWSTR, DWORD, DWORD, void *);
 146 typedef HWND(WINAPI *GETCONSWIN) (void);
 147
 148 /*
 149  * This structure contains CAPI ENGINE specific data: it contains various
 150  * global options and affects how other functions behave.
 151  */
 152
 153 #  define CAPI_DBG_TRACE  2
 154 #  define CAPI_DBG_ERROR  1
 155
 156 struct CAPI_CTX_st {
 157     int debug_level;
 158     char *debug_file;
 159     /* Parameters to use for container lookup */
 160     DWORD keytype;
 161     LPSTR cspname;
 162     DWORD csptype;
 163     /* Certificate store name to use */
 164     LPSTR storename;
 165     LPSTR ssl_client_store;
 166     /* System store flags */
 167     DWORD store_flags;
 168 /* Lookup string meanings in load_private_key */
 169 /* Substring of subject: uses "storename" */
 170 #  define CAPI_LU_SUBSTR          1
 171 /* Friendly name: uses storename */
 172 #  define CAPI_LU_FNAME           2
 173 /* Container name: uses cspname, keytype */
 174 #  define CAPI_LU_CONTNAME        3
 175     int lookup_method;
 176 /* Info to dump with dumpcerts option */
 177 /* Issuer and serial name strings */
 178 #  define CAPI_DMP_SUMMARY        0x1
 179 /* Friendly name */
 180 #  define CAPI_DMP_FNAME          0x2
 181 /* Full X509_print dump */
 182 #  define CAPI_DMP_FULL           0x4
 183 /* Dump PEM format certificate */
 184 #  define CAPI_DMP_PEM            0x8
 185 /* Dump pseudo key (if possible) */
 186 #  define CAPI_DMP_PSKEY          0x10
 187 /* Dump key info (if possible) */
 188 #  define CAPI_DMP_PKEYINFO       0x20
 189     DWORD dump_flags;
 190     int (*client_cert_select) (ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
 191     CERTDLG certselectdlg;
 192     GETCONSWIN getconswindow;
 193 };
 194
 195 static CAPI_CTX *capi_ctx_new();
 196 static void capi_ctx_free(CAPI_CTX * ctx);
 197 static int capi_ctx_set_provname(CAPI_CTX * ctx, LPSTR pname, DWORD type,
 198                                  int check);
 199 static int capi_ctx_set_provname_idx(CAPI_CTX * ctx, int idx);
 200
 201 #  define CAPI_CMD_LIST_CERTS             ENGINE_CMD_BASE
 202 #  define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
 203 #  define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
 204 #  define CAPI_CMD_DEBUG_FILE             (ENGINE_CMD_BASE + 3)
 205 #  define CAPI_CMD_KEYTYPE                (ENGINE_CMD_BASE + 4)
 206 #  define CAPI_CMD_LIST_CSPS              (ENGINE_CMD_BASE + 5)
 207 #  define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
 208 #  define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
 209 #  define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
 210 #  define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
 211 #  define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
 212 #  define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
 213 #  define CAPI_CMD_STORE_NAME             (ENGINE_CMD_BASE + 12)
 214 #  define CAPI_CMD_STORE_FLAGS            (ENGINE_CMD_BASE + 13)
 215
 216 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
 217     {CAPI_CMD_LIST_CERTS,
 218      "list_certs",
 219      "List all certificates in store",
 220      ENGINE_CMD_FLAG_NO_INPUT},
 221     {CAPI_CMD_LOOKUP_CERT,
 222      "lookup_cert",
 223      "Lookup and output certificates",
 224      ENGINE_CMD_FLAG_STRING},
 225     {CAPI_CMD_DEBUG_LEVEL,
 226      "debug_level",
 227      "debug level (1=errors, 2=trace)",
 228      ENGINE_CMD_FLAG_NUMERIC},
 229     {CAPI_CMD_DEBUG_FILE,
 230      "debug_file",
 231      "debugging filename)",
 232      ENGINE_CMD_FLAG_STRING},
 233     {CAPI_CMD_KEYTYPE,
 234      "key_type",
 235      "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
 236      ENGINE_CMD_FLAG_NUMERIC},
 237     {CAPI_CMD_LIST_CSPS,
 238      "list_csps",
 239      "List all CSPs",
 240      ENGINE_CMD_FLAG_NO_INPUT},
 241     {CAPI_CMD_SET_CSP_IDX,
 242      "csp_idx",
 243      "Set CSP by index",
 244      ENGINE_CMD_FLAG_NUMERIC},
 245     {CAPI_CMD_SET_CSP_NAME,
 246      "csp_name",
 247      "Set CSP name, (default CSP used if not specified)",
 248      ENGINE_CMD_FLAG_STRING},
 249     {CAPI_CMD_SET_CSP_TYPE,
 250      "csp_type",
 251      "Set CSP type, (default RSA_PROV_FULL)",
 252      ENGINE_CMD_FLAG_NUMERIC},
 253     {CAPI_CMD_LIST_CONTAINERS,
 254      "list_containers",
 255      "list container names",
 256      ENGINE_CMD_FLAG_NO_INPUT},
 257     {CAPI_CMD_LIST_OPTIONS,
 258      "list_options",
 259      "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
 260      "32=private key info)",
 261      ENGINE_CMD_FLAG_NUMERIC},
 262     {CAPI_CMD_LOOKUP_METHOD,
 263      "lookup_method",
 264      "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
 265      ENGINE_CMD_FLAG_NUMERIC},
 266     {CAPI_CMD_STORE_NAME,
 267      "store_name",
 268      "certificate store name, default \"MY\"",
 269      ENGINE_CMD_FLAG_STRING},
 270     {CAPI_CMD_STORE_FLAGS,
 271      "store_flags",
 272      "Certificate store flags: 1 = system store",
 273      ENGINE_CMD_FLAG_NUMERIC},
 274
 275     {0, NULL, NULL, 0}
 276 };
 277
 278 static int capi_idx = -1;
 279 static int rsa_capi_idx = -1;
 280 static int dsa_capi_idx = -1;
 281 static int cert_capi_idx = -1;
 282
 283 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
 284 {
 285     int ret = 1;
 286     CAPI_CTX *ctx;
 287     BIO *out;
 288     if (capi_idx == -1) {
 289         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
 290         return 0;
 291     }
 292     ctx = ENGINE_get_ex_data(e, capi_idx);
 293     out = BIO_new_fp(stdout, BIO_NOCLOSE);
 294     switch (cmd) {
 295     case CAPI_CMD_LIST_CSPS:
 296         ret = capi_list_providers(ctx, out);
 297         break;
 298
 299     case CAPI_CMD_LIST_CERTS:
 300         ret = capi_list_certs(ctx, out, NULL);
 301         break;
 302
 303     case CAPI_CMD_LOOKUP_CERT:
 304         ret = capi_list_certs(ctx, out, p);
 305         break;
 306
 307     case CAPI_CMD_LIST_CONTAINERS:
 308         ret = capi_list_containers(ctx, out);
 309         break;
 310
 311     case CAPI_CMD_STORE_NAME:
 312         if (ctx->storename)
 313             OPENSSL_free(ctx->storename);
 314         ctx->storename = BUF_strdup(p);
 315         CAPI_trace(ctx, "Setting store name to %s\n", p);
 316         break;
 317
 318     case CAPI_CMD_STORE_FLAGS:
 319         if (i & 1) {
 320             ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
 321             ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
 322         } else {
 323             ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
 324             ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
 325         }
 326         CAPI_trace(ctx, "Setting flags to %d\n", i);
 327         break;
 328
 329     case CAPI_CMD_DEBUG_LEVEL:
 330         ctx->debug_level = (int)i;
 331         CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
 332         break;
 333
 334     case CAPI_CMD_DEBUG_FILE:
 335         ctx->debug_file = BUF_strdup(p);
 336         CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
 337         break;
 338
 339     case CAPI_CMD_KEYTYPE:
 340         ctx->keytype = i;
 341         CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
 342         break;
 343
 344     case CAPI_CMD_SET_CSP_IDX:
 345         ret = capi_ctx_set_provname_idx(ctx, i);
 346         break;
 347
 348     case CAPI_CMD_LIST_OPTIONS:
 349         ctx->dump_flags = i;
 350         break;
 351
 352     case CAPI_CMD_LOOKUP_METHOD:
 353         if (i < 1 || i > 3) {
 354             CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
 355             return 0;
 356         }
 357         ctx->lookup_method = i;
 358         break;
 359
 360     case CAPI_CMD_SET_CSP_NAME:
 361         ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
 362         break;
 363
 364     case CAPI_CMD_SET_CSP_TYPE:
 365         ctx->csptype = i;
 366         break;
 367
 368     default:
 369         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
 370         ret = 0;
 371     }
 372
 373     BIO_free(out);
 374     return ret;
 375
 376 }
 377
 378 static RSA_METHOD capi_rsa_method = {
 379     "CryptoAPI RSA method",
 380     0,                          /* pub_enc */
 381     0,                          /* pub_dec */
 382     capi_rsa_priv_enc,          /* priv_enc */
 383     capi_rsa_priv_dec,          /* priv_dec */
 384     0,                          /* rsa_mod_exp */
 385     0,                          /* bn_mod_exp */
 386     0,                          /* init */
 387     capi_rsa_free,              /* finish */
 388     RSA_FLAG_SIGN_VER,          /* flags */
 389     NULL,                       /* app_data */
 390     capi_rsa_sign,              /* rsa_sign */
 391     0                           /* rsa_verify */
 392 };
 393
 394 static DSA_METHOD capi_dsa_method = {
 395     "CryptoAPI DSA method",
 396     capi_dsa_do_sign,           /* dsa_do_sign */
 397     0,                          /* dsa_sign_setup */
 398     0,                          /* dsa_do_verify */
 399     0,                          /* dsa_mod_exp */
 400     0,                          /* bn_mod_exp */
 401     0,                          /* init */
 402     capi_dsa_free,              /* finish */
 403     0,                          /* flags */
 404     NULL,                       /* app_data */
 405     0,                          /* dsa_paramgen */
 406     0                           /* dsa_keygen */
 407 };
 408
 409 static int capi_init(ENGINE *e)
 410 {
 411     CAPI_CTX *ctx;
 412     const RSA_METHOD *ossl_rsa_meth;
 413     const DSA_METHOD *ossl_dsa_meth;
 414
 415     if (capi_idx < 0) {
 416         capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
 417         if (capi_idx < 0)
 418             goto memerr;
 419
 420         cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
 421
 422         /* Setup RSA_METHOD */
 423         rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 424         ossl_rsa_meth = RSA_PKCS1_SSLeay();
 425         capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
 426         capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
 427         capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
 428         capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
 429
 430         /* Setup DSA Method */
 431         dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
 432         ossl_dsa_meth = DSA_OpenSSL();
 433         capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
 434         capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
 435         capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
 436     }
 437
 438     ctx = capi_ctx_new();
 439     if (!ctx)
 440         goto memerr;
 441
 442     ENGINE_set_ex_data(e, capi_idx, ctx);
 443
 444 #  ifdef OPENSSL_CAPIENG_DIALOG
 445     {
 446         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
 447         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
 448         if (cryptui)
 449             ctx->certselectdlg =
 450                 (CERTDLG) GetProcAddress(cryptui,
 451                                          "CryptUIDlgSelectCertificateFromStore");
 452         if (kernel)
 453             ctx->getconswindow =
 454                 (GETCONSWIN) GetProcAddress(kernel, "GetConsoleWindow");
 455         if (cryptui && !OPENSSL_isservice())
 456             ctx->client_cert_select = cert_select_dialog;
 457     }
 458 #  endif
 459
 460     return 1;
 461
 462  memerr:
 463     CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
 464     return 0;
 465
 466     return 1;
 467 }
 468
 469 static int capi_destroy(ENGINE *e)
 470 {
 471     ERR_unload_CAPI_strings();
 472     return 1;
 473 }
 474
 475 static int capi_finish(ENGINE *e)
 476 {
 477     CAPI_CTX *ctx;
 478     ctx = ENGINE_get_ex_data(e, capi_idx);
 479     capi_ctx_free(ctx);
 480     ENGINE_set_ex_data(e, capi_idx, NULL);
 481     return 1;
 482 }
 483
 484 /*
 485  * CryptoAPI key application data. This contains a handle to the private key
 486  * container (for sign operations) and a handle to the key (for decrypt
 487  * operations).
 488  */
 489
 490 struct CAPI_KEY_st {
 491     /* Associated certificate context (if any) */
 492     PCCERT_CONTEXT pcert;
 493     HCRYPTPROV hprov;
 494     HCRYPTKEY key;
 495     DWORD keyspec;
 496 };
 497
 498 static int bind_capi(ENGINE *e)
 499 {
 500     if (!ENGINE_set_id(e, engine_capi_id)
 501         || !ENGINE_set_name(e, engine_capi_name)
 502         || !ENGINE_set_init_function(e, capi_init)
 503         || !ENGINE_set_finish_function(e, capi_finish)
 504         || !ENGINE_set_destroy_function(e, capi_destroy)
 505         || !ENGINE_set_RSA(e, &capi_rsa_method)
 506         || !ENGINE_set_DSA(e, &capi_dsa_method)
 507         || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
 508         || !ENGINE_set_load_ssl_client_cert_function(e,
 509                                                      capi_load_ssl_client_cert)
 510         || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
 511         || !ENGINE_set_ctrl_function(e, capi_ctrl))
 512         return 0;
 513     ERR_load_CAPI_strings();
 514
 515     return 1;
 516
 517 }
 518
 519 #  ifndef OPENSSL_NO_DYNAMIC_ENGINE
 520 static int bind_helper(ENGINE *e, const char *id)
 521 {
 522     if (id && (strcmp(id, engine_capi_id) != 0))
 523         return 0;
 524     if (!bind_capi(e))
 525         return 0;
 526     return 1;
 527 }
 528
 529 IMPLEMENT_DYNAMIC_CHECK_FN()
 530     IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 531 #  else
 532 static ENGINE *engine_capi(void)
 533 {
 534     ENGINE *ret = ENGINE_new();
 535     if (!ret)
 536         return NULL;
 537     if (!bind_capi(ret)) {
 538         ENGINE_free(ret);
 539         return NULL;
 540     }
 541     return ret;
 542 }
 543
 544 void ENGINE_load_capi(void)
 545 {
 546     /* Copied from eng_[openssl|dyn].c */
 547     ENGINE *toadd = engine_capi();
 548     if (!toadd)
 549         return;
 550     ENGINE_add(toadd);
 551     ENGINE_free(toadd);
 552     ERR_clear_error();
 553 }
 554 #  endif
 555
 556 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
 557 {
 558     int i;
 559     /*
 560      * Reverse buffer in place: since this is a keyblob structure that will
 561      * be freed up after conversion anyway it doesn't matter if we change
 562      * it.
 563      */
 564     for (i = 0; i < binlen / 2; i++) {
 565         unsigned char c;
 566         c = bin[i];
 567         bin[i] = bin[binlen - i - 1];
 568         bin[binlen - i - 1] = c;
 569     }
 570
 571     if (!BN_bin2bn(bin, binlen, bn))
 572         return 0;
 573     return 1;
 574 }
 575
 576 /* Given a CAPI_KEY get an EVP_PKEY structure */
 577
 578 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY * key)
 579 {
 580     unsigned char *pubkey = NULL;
 581     DWORD len;
 582     BLOBHEADER *bh;
 583     RSA *rkey = NULL;
 584     DSA *dkey = NULL;
 585     EVP_PKEY *ret = NULL;
 586     if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len)) {
 587         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
 588         capi_addlasterror();
 589         return NULL;
 590     }
 591
 592     pubkey = OPENSSL_malloc(len);
 593
 594     if (!pubkey)
 595         goto memerr;
 596
 597     if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len)) {
 598         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
 599         capi_addlasterror();
 600         goto err;
 601     }
 602
 603     bh = (BLOBHEADER *) pubkey;
 604     if (bh->bType != PUBLICKEYBLOB) {
 605         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
 606         goto err;
 607     }
 608     if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX) {
 609         RSAPUBKEY *rp;
 610         DWORD rsa_modlen;
 611         unsigned char *rsa_modulus;
 612         rp = (RSAPUBKEY *) (bh + 1);
 613         if (rp->magic != 0x31415352) {
 614             char magstr[10];
 615             BIO_snprintf(magstr, 10, "%lx", rp->magic);
 616             CAPIerr(CAPI_F_CAPI_GET_PKEY,
 617                     CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 618             ERR_add_error_data(2, "magic=0x", magstr);
 619             goto err;
 620         }
 621         rsa_modulus = (unsigned char *)(rp + 1);
 622         rkey = RSA_new_method(eng);
 623         if (!rkey)
 624             goto memerr;
 625
 626         rkey->e = BN_new();
 627         rkey->n = BN_new();
 628
 629         if (!rkey->e || !rkey->n)
 630             goto memerr;
 631
 632         if (!BN_set_word(rkey->e, rp->pubexp))
 633             goto memerr;
 634
 635         rsa_modlen = rp->bitlen / 8;
 636         if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
 637             goto memerr;
 638
 639         RSA_set_ex_data(rkey, rsa_capi_idx, key);
 640
 641         if (!(ret = EVP_PKEY_new()))
 642             goto memerr;
 643
 644         EVP_PKEY_assign_RSA(ret, rkey);
 645         rkey = NULL;
 646
 647     } else if (bh->aiKeyAlg == CALG_DSS_SIGN) {
 648         DSSPUBKEY *dp;
 649         DWORD dsa_plen;
 650         unsigned char *btmp;
 651         dp = (DSSPUBKEY *) (bh + 1);
 652         if (dp->magic != 0x31535344) {
 653             char magstr[10];
 654             BIO_snprintf(magstr, 10, "%lx", dp->magic);
 655             CAPIerr(CAPI_F_CAPI_GET_PKEY,
 656                     CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
 657             ERR_add_error_data(2, "magic=0x", magstr);
 658             goto err;
 659         }
 660         dsa_plen = dp->bitlen / 8;
 661         btmp = (unsigned char *)(dp + 1);
 662         dkey = DSA_new_method(eng);
 663         if (!dkey)
 664             goto memerr;
 665         dkey->p = BN_new();
 666         dkey->q = BN_new();
 667         dkey->g = BN_new();
 668         dkey->pub_key = BN_new();
 669         if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
 670             goto memerr;
 671         if (!lend_tobn(dkey->p, btmp, dsa_plen))
 672             goto memerr;
 673         btmp += dsa_plen;
 674         if (!lend_tobn(dkey->q, btmp, 20))
 675             goto memerr;
 676         btmp += 20;
 677         if (!lend_tobn(dkey->g, btmp, dsa_plen))
 678             goto memerr;
 679         btmp += dsa_plen;
 680         if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
 681             goto memerr;
 682         btmp += dsa_plen;
 683
 684         DSA_set_ex_data(dkey, dsa_capi_idx, key);
 685
 686         if (!(ret = EVP_PKEY_new()))
 687             goto memerr;
 688
 689         EVP_PKEY_assign_DSA(ret, dkey);
 690         dkey = NULL;
 691     } else {
 692         char algstr[10];
 693         BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
 694         CAPIerr(CAPI_F_CAPI_GET_PKEY,
 695                 CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
 696         ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
 697         goto err;
 698     }
 699
 700  err:
 701     if (pubkey)
 702         OPENSSL_free(pubkey);
 703     if (!ret) {
 704         if (rkey)
 705             RSA_free(rkey);
 706         if (dkey)
 707             DSA_free(dkey);
 708     }
 709
 710     return ret;
 711
 712  memerr:
 713     CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
 714     goto err;
 715
 716 }
 717
 718 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
 719                                    UI_METHOD *ui_method, void *callback_data)
 720 {
 721     CAPI_CTX *ctx;
 722     CAPI_KEY *key;
 723     EVP_PKEY *ret;
 724     ctx = ENGINE_get_ex_data(eng, capi_idx);
 725
 726     if (!ctx) {
 727         CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
 728         return NULL;
 729     }
 730
 731     key = capi_find_key(ctx, key_id);
 732
 733     if (!key)
 734         return NULL;
 735
 736     ret = capi_get_pkey(eng, key);
 737
 738     if (!ret)
 739         capi_free_key(key);
 740     return ret;
 741
 742 }
 743
 744 /* CryptoAPI RSA operations */
 745
 746 int capi_rsa_priv_enc(int flen, const unsigned char *from,
 747                       unsigned char *to, RSA *rsa, int padding)
 748 {
 749     CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
 750     return -1;
 751 }
 752
 753 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
 754                   unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
 755 {
 756     ALG_ID alg;
 757     HCRYPTHASH hash;
 758     DWORD slen;
 759     unsigned int i;
 760     int ret = -1;
 761     CAPI_KEY *capi_key;
 762     CAPI_CTX *ctx;
 763
 764     ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 765
 766     CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
 767
 768     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 769     if (!capi_key) {
 770         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
 771         return -1;
 772     }
 773 /* Convert the signature type to a CryptoAPI algorithm ID */
 774     switch (dtype) {
 775     case NID_sha1:
 776         alg = CALG_SHA1;
 777         break;
 778
 779     case NID_md5:
 780         alg = CALG_MD5;
 781         break;
 782
 783     case NID_md5_sha1:
 784         alg = CALG_SSL3_SHAMD5;
 785         break;
 786     default:
 787         {
 788             char algstr[10];
 789             BIO_snprintf(algstr, 10, "%lx", dtype);
 790             CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
 791             ERR_add_error_data(2, "NID=0x", algstr);
 792             return -1;
 793         }
 794     }
 795
 796 /* Create the hash object */
 797     if (!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash)) {
 798         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 799         capi_addlasterror();
 800         return -1;
 801     }
 802 /* Set the hash value to the value passed */
 803
 804     if (!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0)) {
 805         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 806         capi_addlasterror();
 807         goto err;
 808     }
 809
 810 /* Finally sign it */
 811     slen = RSA_size(rsa);
 812     if (!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen)) {
 813         CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 814         capi_addlasterror();
 815         goto err;
 816     } else {
 817         ret = 1;
 818         /* Inplace byte reversal of signature */
 819         for (i = 0; i < slen / 2; i++) {
 820             unsigned char c;
 821             c = sigret[i];
 822             sigret[i] = sigret[slen - i - 1];
 823             sigret[slen - i - 1] = c;
 824         }
 825         *siglen = slen;
 826     }
 827
 828     /* Now cleanup */
 829
 830  err:
 831     CryptDestroyHash(hash);
 832
 833     return ret;
 834 }
 835
 836 int capi_rsa_priv_dec(int flen, const unsigned char *from,
 837                       unsigned char *to, RSA *rsa, int padding)
 838 {
 839     int i;
 840     unsigned char *tmpbuf;
 841     CAPI_KEY *capi_key;
 842     CAPI_CTX *ctx;
 843     ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
 844
 845     CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
 846
 847     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 848     if (!capi_key) {
 849         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
 850         return -1;
 851     }
 852
 853     if (padding != RSA_PKCS1_PADDING) {
 854         char errstr[10];
 855         BIO_snprintf(errstr, 10, "%d", padding);
 856         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
 857         ERR_add_error_data(2, "padding=", errstr);
 858         return -1;
 859     }
 860
 861     /* Create temp reverse order version of input */
 862     if (!(tmpbuf = OPENSSL_malloc(flen))) {
 863         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
 864         return -1;
 865     }
 866     for (i = 0; i < flen; i++)
 867         tmpbuf[flen - i - 1] = from[i];
 868
 869     /* Finally decrypt it */
 870     if (!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen)) {
 871         CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
 872         capi_addlasterror();
 873         OPENSSL_free(tmpbuf);
 874         return -1;
 875     } else
 876         memcpy(to, tmpbuf, flen);
 877
 878     OPENSSL_free(tmpbuf);
 879
 880     return flen;
 881 }
 882
 883 static int capi_rsa_free(RSA *rsa)
 884 {
 885     CAPI_KEY *capi_key;
 886     capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
 887     capi_free_key(capi_key);
 888     RSA_set_ex_data(rsa, rsa_capi_idx, 0);
 889     return 1;
 890 }
 891
 892 /* CryptoAPI DSA operations */
 893
 894 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
 895                                  DSA *dsa)
 896 {
 897     HCRYPTHASH hash;
 898     DWORD slen;
 899     DSA_SIG *ret = NULL;
 900     CAPI_KEY *capi_key;
 901     CAPI_CTX *ctx;
 902     unsigned char csigbuf[40];
 903
 904     ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
 905
 906     CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
 907
 908     capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 909
 910     if (!capi_key) {
 911         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
 912         return NULL;
 913     }
 914
 915     if (dlen != 20) {
 916         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
 917         return NULL;
 918     }
 919
 920     /* Create the hash object */
 921     if (!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash)) {
 922         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
 923         capi_addlasterror();
 924         return NULL;
 925     }
 926
 927     /* Set the hash value to the value passed */
 928     if (!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0)) {
 929         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
 930         capi_addlasterror();
 931         goto err;
 932     }
 933
 934     /* Finally sign it */
 935     slen = sizeof(csigbuf);
 936     if (!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen)) {
 937         CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
 938         capi_addlasterror();
 939         goto err;
 940     } else {
 941         ret = DSA_SIG_new();
 942         if (!ret)
 943             goto err;
 944         ret->r = BN_new();
 945         ret->s = BN_new();
 946         if (!ret->r || !ret->s)
 947             goto err;
 948         if (!lend_tobn(ret->r, csigbuf, 20)
 949             || !lend_tobn(ret->s, csigbuf + 20, 20)) {
 950             DSA_SIG_free(ret);
 951             ret = NULL;
 952             goto err;
 953         }
 954     }
 955
 956     /* Now cleanup */
 957
 958  err:
 959     OPENSSL_cleanse(csigbuf, 40);
 960     CryptDestroyHash(hash);
 961     return ret;
 962 }
 963
 964 static int capi_dsa_free(DSA *dsa)
 965 {
 966     CAPI_KEY *capi_key;
 967     capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
 968     capi_free_key(capi_key);
 969     DSA_set_ex_data(dsa, dsa_capi_idx, 0);
 970     return 1;
 971 }
 972
 973 static void capi_vtrace(CAPI_CTX * ctx, int level, char *format,
 974                         va_list argptr)
 975 {
 976     BIO *out;
 977
 978     if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
 979         return;
 980     out = BIO_new_file(ctx->debug_file, "a+");
 981     BIO_vprintf(out, format, argptr);
 982     BIO_free(out);
 983 }
 984
 985 static void CAPI_trace(CAPI_CTX * ctx, char *format, ...)
 986 {
 987     va_list args;
 988     va_start(args, format);
 989     capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
 990     va_end(args);
 991 }
 992
 993 static void capi_addlasterror(void)
 994 {
 995     capi_adderror(GetLastError());
 996 }
 997
 998 static void capi_adderror(DWORD err)
 999 {
1000     char errstr[10];
1001     BIO_snprintf(errstr, 10, "%lX", err);
1002     ERR_add_error_data(2, "Error code= 0x", errstr);
1003 }
1004
1005 static char *wide_to_asc(LPWSTR wstr)
1006 {
1007     char *str;
1008     int len_0, sz;
1009
1010     if (!wstr)
1011         return NULL;
1012     len_0 = (int)wcslen(wstr) + 1; /* WideCharToMultiByte expects int */
1013     sz = WideCharToMultiByte(CP_ACP, 0, wstr, len_0, NULL, 0, NULL, NULL);
1014     if (!sz) {
1015         CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1016         return NULL;
1017     }
1018     str = OPENSSL_malloc(sz);
1019     if (!str) {
1020         CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1021         return NULL;
1022     }
1023     if (!WideCharToMultiByte(CP_ACP, 0, wstr, len_0, str, sz, NULL, NULL)) {
1024         OPENSSL_free(str);
1025         CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1026         return NULL;
1027     }
1028     return str;
1029 }
1030
1031 static int capi_get_provname(CAPI_CTX * ctx, LPSTR * pname, DWORD * ptype,
1032                              DWORD idx)
1033 {
1034     LPSTR name;
1035     DWORD len, err;
1036     CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1037     if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len)) {
1038         err = GetLastError();
1039         if (err == ERROR_NO_MORE_ITEMS)
1040             return 2;
1041         CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1042         capi_adderror(err);
1043         return 0;
1044     }
1045     name = OPENSSL_malloc(len);
1046     if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len)) {
1047         err = GetLastError();
1048         if (err == ERROR_NO_MORE_ITEMS)
1049             return 2;
1050         CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1051         capi_adderror(err);
1052         return 0;
1053     }
1054     *pname = name;
1055     CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name,
1056                *ptype);
1057
1058     return 1;
1059 }
1060
1061 static int capi_list_providers(CAPI_CTX * ctx, BIO *out)
1062 {
1063     DWORD idx, ptype;
1064     int ret;
1065     LPSTR provname = NULL;
1066     CAPI_trace(ctx, "capi_list_providers\n");
1067     BIO_printf(out, "Available CSPs:\n");
1068     for (idx = 0;; idx++) {
1069         ret = capi_get_provname(ctx, &provname, &ptype, idx);
1070         if (ret == 2)
1071             break;
1072         if (ret == 0)
1073             break;
1074         BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1075         OPENSSL_free(provname);
1076     }
1077     return 1;
1078 }
1079
1080 static int capi_list_containers(CAPI_CTX * ctx, BIO *out)
1081 {
1082     int ret = 1;
1083     HCRYPTPROV hprov;
1084     DWORD err, idx, flags, buflen = 0, clen;
1085     LPSTR cname;
1086     CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname,
1087                ctx->csptype);
1088     if (!CryptAcquireContextA
1089         (&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT)) {
1090         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS,
1091                 CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1092         capi_addlasterror();
1093         return 0;
1094     }
1095     if (!CryptGetProvParam
1096         (hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST)) {
1097         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1098         capi_addlasterror();
1099         CryptReleaseContext(hprov, 0);
1100         return 0;
1101     }
1102     CAPI_trace(ctx, "Got max container len %d\n", buflen);
1103     if (buflen == 0)
1104         buflen = 1024;
1105     cname = OPENSSL_malloc(buflen);
1106     if (!cname) {
1107         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1108         goto err;
1109     }
1110
1111     for (idx = 0;; idx++) {
1112         clen = buflen;
1113         cname[0] = 0;
1114
1115         if (idx == 0)
1116             flags = CRYPT_FIRST;
1117         else
1118             flags = 0;
1119         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags)) {
1120             err = GetLastError();
1121             if (err == ERROR_NO_MORE_ITEMS)
1122                 goto done;
1123             CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1124             capi_adderror(err);
1125             goto err;
1126         }
1127         CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n",
1128                    cname, clen, idx, flags);
1129         if (!cname[0] && (clen == buflen)) {
1130             CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1131             goto done;
1132         }
1133         BIO_printf(out, "%d. %s\n", idx, cname);
1134     }
1135  err:
1136
1137     ret = 0;
1138
1139  done:
1140     if (cname)
1141         OPENSSL_free(cname);
1142     CryptReleaseContext(hprov, 0);
1143
1144     return ret;
1145 }
1146
1147 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1148 {
1149     DWORD len;
1150     CRYPT_KEY_PROV_INFO *pinfo;
1151
1152     if (!CertGetCertificateContextProperty
1153         (cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1154         return NULL;
1155     pinfo = OPENSSL_malloc(len);
1156     if (!pinfo) {
1157         CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1158         return NULL;
1159     }
1160     if (!CertGetCertificateContextProperty
1161         (cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len)) {
1162         CAPIerr(CAPI_F_CAPI_GET_PROV_INFO,
1163                 CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1164         capi_addlasterror();
1165         OPENSSL_free(pinfo);
1166         return NULL;
1167     }
1168     return pinfo;
1169 }
1170
1171 static void capi_dump_prov_info(CAPI_CTX * ctx, BIO *out,
1172                                 CRYPT_KEY_PROV_INFO * pinfo)
1173 {
1174     char *provname = NULL, *contname = NULL;
1175     if (!pinfo) {
1176         BIO_printf(out, "  No Private Key\n");
1177         return;
1178     }
1179     provname = wide_to_asc(pinfo->pwszProvName);
1180     contname = wide_to_asc(pinfo->pwszContainerName);
1181     if (!provname || !contname)
1182         goto err;
1183
1184     BIO_printf(out, "  Private Key Info:\n");
1185     BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname,
1186                pinfo->dwProvType);
1187     BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname,
1188                pinfo->dwKeySpec);
1189  err:
1190     if (provname)
1191         OPENSSL_free(provname);
1192     if (contname)
1193         OPENSSL_free(contname);
1194 }
1195
1196 char *capi_cert_get_fname(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1197 {
1198     LPWSTR wfname;
1199     DWORD dlen;
1200
1201     CAPI_trace(ctx, "capi_cert_get_fname\n");
1202     if (!CertGetCertificateContextProperty
1203         (cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1204         return NULL;
1205     wfname = OPENSSL_malloc(dlen);
1206     if (CertGetCertificateContextProperty
1207         (cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen)) {
1208         char *fname = wide_to_asc(wfname);
1209         OPENSSL_free(wfname);
1210         return fname;
1211     }
1212     CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1213     capi_addlasterror();
1214
1215     OPENSSL_free(wfname);
1216     return NULL;
1217 }
1218
1219 void capi_dump_cert(CAPI_CTX * ctx, BIO *out, PCCERT_CONTEXT cert)
1220 {
1221     X509 *x;
1222     unsigned char *p;
1223     unsigned long flags = ctx->dump_flags;
1224     if (flags & CAPI_DMP_FNAME) {
1225         char *fname;
1226         fname = capi_cert_get_fname(ctx, cert);
1227         if (fname) {
1228             BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1229             OPENSSL_free(fname);
1230         } else
1231             BIO_printf(out, "  <No Friendly Name>\n");
1232     }
1233
1234     p = cert->pbCertEncoded;
1235     x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1236     if (!x)
1237         BIO_printf(out, "  <Can't parse certificate>\n");
1238     if (flags & CAPI_DMP_SUMMARY) {
1239         BIO_printf(out, "  Subject: ");
1240         X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1241         BIO_printf(out, "\n  Issuer: ");
1242         X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1243         BIO_printf(out, "\n");
1244     }
1245     if (flags & CAPI_DMP_FULL)
1246         X509_print_ex(out, x, XN_FLAG_ONELINE, 0);
1247
1248     if (flags & CAPI_DMP_PKEYINFO) {
1249         CRYPT_KEY_PROV_INFO *pinfo;
1250         pinfo = capi_get_prov_info(ctx, cert);
1251         capi_dump_prov_info(ctx, out, pinfo);
1252         if (pinfo)
1253             OPENSSL_free(pinfo);
1254     }
1255
1256     if (flags & CAPI_DMP_PEM)
1257         PEM_write_bio_X509(out, x);
1258     X509_free(x);
1259 }
1260
1261 HCERTSTORE capi_open_store(CAPI_CTX * ctx, char *storename)
1262 {
1263     HCERTSTORE hstore;
1264
1265     if (!storename)
1266         storename = ctx->storename;
1267     if (!storename)
1268         storename = "MY";
1269     CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1270
1271     hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
1272                            ctx->store_flags, storename);
1273     if (!hstore) {
1274         CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1275         capi_addlasterror();
1276     }
1277     return hstore;
1278 }
1279
1280 int capi_list_certs(CAPI_CTX * ctx, BIO *out, char *id)
1281 {
1282     char *storename;
1283     int idx;
1284     int ret = 1;
1285     HCERTSTORE hstore;
1286     PCCERT_CONTEXT cert = NULL;
1287
1288     storename = ctx->storename;
1289     if (!storename)
1290         storename = "MY";
1291     CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1292
1293     hstore = capi_open_store(ctx, storename);
1294     if (!hstore)
1295         return 0;
1296     if (id) {
1297         cert = capi_find_cert(ctx, id, hstore);
1298         if (!cert) {
1299             ret = 0;
1300             goto err;
1301         }
1302         capi_dump_cert(ctx, out, cert);
1303         CertFreeCertificateContext(cert);
1304     } else {
1305         for (idx = 0;; idx++) {
1306             LPWSTR fname = NULL;
1307             cert = CertEnumCertificatesInStore(hstore, cert);
1308             if (!cert)
1309                 break;
1310             BIO_printf(out, "Certificate %d\n", idx);
1311             capi_dump_cert(ctx, out, cert);
1312         }
1313     }
1314  err:
1315     CertCloseStore(hstore, 0);
1316     return ret;
1317 }
1318
1319 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX * ctx, const char *id,
1320                                      HCERTSTORE hstore)
1321 {
1322     PCCERT_CONTEXT cert = NULL;
1323     char *fname = NULL;
1324     int match;
1325     switch (ctx->lookup_method) {
1326     case CAPI_LU_SUBSTR:
1327         return CertFindCertificateInStore(hstore,
1328                                           X509_ASN_ENCODING, 0,
1329                                           CERT_FIND_SUBJECT_STR_A, id, NULL);
1330     case CAPI_LU_FNAME:
1331         for (;;) {
1332             cert = CertEnumCertificatesInStore(hstore, cert);
1333             if (!cert)
1334                 return NULL;
1335             fname = capi_cert_get_fname(ctx, cert);
1336             if (fname) {
1337                 if (strcmp(fname, id))
1338                     match = 0;
1339                 else
1340                     match = 1;
1341                 OPENSSL_free(fname);
1342                 if (match)
1343                     return cert;
1344             }
1345         }
1346     default:
1347         return NULL;
1348     }
1349 }
1350
1351 static CAPI_KEY *capi_get_key(CAPI_CTX * ctx, const char *contname,
1352                               char *provname, DWORD ptype, DWORD keyspec)
1353 {
1354     CAPI_KEY *key;
1355     DWORD dwFlags = 0;
1356     key = OPENSSL_malloc(sizeof(CAPI_KEY));
1357     CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
1358                contname, provname, ptype);
1359     if (ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
1360         dwFlags = CRYPT_MACHINE_KEYSET;
1361     if (!CryptAcquireContextA
1362         (&key->hprov, contname, provname, ptype, dwFlags)) {
1363         CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1364         capi_addlasterror();
1365         goto err;
1366     }
1367     if (!CryptGetUserKey(key->hprov, keyspec, &key->key)) {
1368         CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1369         capi_addlasterror();
1370         CryptReleaseContext(key->hprov, 0);
1371         goto err;
1372     }
1373     key->keyspec = keyspec;
1374     key->pcert = NULL;
1375     return key;
1376
1377  err:
1378     OPENSSL_free(key);
1379     return NULL;
1380 }
1381
1382 static CAPI_KEY *capi_get_cert_key(CAPI_CTX * ctx, PCCERT_CONTEXT cert)
1383 {
1384     CAPI_KEY *key = NULL;
1385     CRYPT_KEY_PROV_INFO *pinfo = NULL;
1386     char *provname = NULL, *contname = NULL;
1387     pinfo = capi_get_prov_info(ctx, cert);
1388     if (!pinfo)
1389         goto err;
1390     provname = wide_to_asc(pinfo->pwszProvName);
1391     contname = wide_to_asc(pinfo->pwszContainerName);
1392     if (!provname || !contname)
1393         goto err;
1394     key = capi_get_key(ctx, contname, provname,
1395                        pinfo->dwProvType, pinfo->dwKeySpec);
1396
1397  err:
1398     if (pinfo)
1399         OPENSSL_free(pinfo);
1400     if (provname)
1401         OPENSSL_free(provname);
1402     if (contname)
1403         OPENSSL_free(contname);
1404     return key;
1405 }
1406
1407 CAPI_KEY *capi_find_key(CAPI_CTX * ctx, const char *id)
1408 {
1409     PCCERT_CONTEXT cert;
1410     HCERTSTORE hstore;
1411     CAPI_KEY *key = NULL;
1412     switch (ctx->lookup_method) {
1413     case CAPI_LU_SUBSTR:
1414     case CAPI_LU_FNAME:
1415         hstore = capi_open_store(ctx, NULL);
1416         if (!hstore)
1417             return NULL;
1418         cert = capi_find_cert(ctx, id, hstore);
1419         if (cert) {
1420             key = capi_get_cert_key(ctx, cert);
1421             CertFreeCertificateContext(cert);
1422         }
1423         CertCloseStore(hstore, 0);
1424         break;
1425
1426     case CAPI_LU_CONTNAME:
1427         key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype, ctx->keytype);
1428         break;
1429     }
1430
1431     return key;
1432 }
1433
1434 void capi_free_key(CAPI_KEY * key)
1435 {
1436     if (!key)
1437         return;
1438     CryptDestroyKey(key->key);
1439     CryptReleaseContext(key->hprov, 0);
1440     if (key->pcert)
1441         CertFreeCertificateContext(key->pcert);
1442     OPENSSL_free(key);
1443 }
1444
1445 /* Initialize a CAPI_CTX structure */
1446
1447 static CAPI_CTX *capi_ctx_new()
1448 {
1449     CAPI_CTX *ctx;
1450     ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1451     if (!ctx) {
1452         CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1453         return NULL;
1454     }
1455     ctx->cspname = NULL;
1456     ctx->csptype = PROV_RSA_FULL;
1457     ctx->dump_flags = CAPI_DMP_SUMMARY | CAPI_DMP_FNAME;
1458     ctx->keytype = AT_KEYEXCHANGE;
1459     ctx->storename = NULL;
1460     ctx->ssl_client_store = NULL;
1461     ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1462         CERT_STORE_READONLY_FLAG | CERT_SYSTEM_STORE_CURRENT_USER;
1463     ctx->lookup_method = CAPI_LU_SUBSTR;
1464     ctx->debug_level = 0;
1465     ctx->debug_file = NULL;
1466     ctx->client_cert_select = cert_select_simple;
1467     return ctx;
1468 }
1469
1470 static void capi_ctx_free(CAPI_CTX * ctx)
1471 {
1472     CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1473     if (!ctx)
1474         return;
1475     if (ctx->cspname)
1476         OPENSSL_free(ctx->cspname);
1477     if (ctx->debug_file)
1478         OPENSSL_free(ctx->debug_file);
1479     if (ctx->storename)
1480         OPENSSL_free(ctx->storename);
1481     if (ctx->ssl_client_store)
1482         OPENSSL_free(ctx->ssl_client_store);
1483     OPENSSL_free(ctx);
1484 }
1485
1486 static int capi_ctx_set_provname(CAPI_CTX * ctx, LPSTR pname, DWORD type,
1487                                  int check)
1488 {
1489     CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1490     if (check) {
1491         HCRYPTPROV hprov;
1492         if (!CryptAcquireContextA(&hprov, NULL, pname, type,
1493                                   CRYPT_VERIFYCONTEXT)) {
1494             CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME,
1495                     CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1496             capi_addlasterror();
1497             return 0;
1498         }
1499         CryptReleaseContext(hprov, 0);
1500     }
1501     if (ctx->cspname)
1502         OPENSSL_free(ctx->cspname);
1503     ctx->cspname = BUF_strdup(pname);
1504     ctx->csptype = type;
1505     return 1;
1506 }
1507
1508 static int capi_ctx_set_provname_idx(CAPI_CTX * ctx, int idx)
1509 {
1510     LPSTR pname;
1511     DWORD type;
1512     int res;
1513     if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1514         return 0;
1515     res = capi_ctx_set_provname(ctx, pname, type, 0);
1516     OPENSSL_free(pname);
1517     return res;
1518 }
1519
1520 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1521 {
1522     int i;
1523     X509_NAME *nm;
1524     /* Special case: empty list: match anything */
1525     if (sk_X509_NAME_num(ca_dn) <= 0)
1526         return 1;
1527     for (i = 0; i < sk_X509_NAME_num(ca_dn); i++) {
1528         nm = sk_X509_NAME_value(ca_dn, i);
1529         if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1530             return 1;
1531     }
1532     return 0;
1533 }
1534
1535 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1536                                      STACK_OF(X509_NAME) *ca_dn, X509 **pcert,
1537                                      EVP_PKEY **pkey, STACK_OF(X509) **pother,
1538                                      UI_METHOD *ui_method,
1539                                      void *callback_data)
1540 {
1541     STACK_OF(X509) *certs = NULL;
1542     X509 *x;
1543     char *storename;
1544     const char *p;
1545     int i, client_cert_idx;
1546     HCERTSTORE hstore;
1547     PCCERT_CONTEXT cert = NULL, excert = NULL;
1548     CAPI_CTX *ctx;
1549     CAPI_KEY *key;
1550     ctx = ENGINE_get_ex_data(e, capi_idx);
1551
1552     *pcert = NULL;
1553     *pkey = NULL;
1554
1555     storename = ctx->ssl_client_store;
1556     if (!storename)
1557         storename = "MY";
1558
1559     hstore = capi_open_store(ctx, storename);
1560     if (!hstore)
1561         return 0;
1562     /* Enumerate all certificates collect any matches */
1563     for (i = 0;; i++) {
1564         cert = CertEnumCertificatesInStore(hstore, cert);
1565         if (!cert)
1566             break;
1567         p = cert->pbCertEncoded;
1568         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1569         if (!x) {
1570             CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1571             continue;
1572         }
1573         if (cert_issuer_match(ca_dn, x)
1574             && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0)) {
1575             key = capi_get_cert_key(ctx, cert);
1576             if (!key) {
1577                 X509_free(x);
1578                 continue;
1579             }
1580             /*
1581              * Match found: attach extra data to it so we can retrieve the
1582              * key later.
1583              */
1584             excert = CertDuplicateCertificateContext(cert);
1585             key->pcert = excert;
1586             X509_set_ex_data(x, cert_capi_idx, key);
1587
1588             if (!certs)
1589                 certs = sk_X509_new_null();
1590
1591             sk_X509_push(certs, x);
1592         } else
1593             X509_free(x);
1594
1595     }
1596
1597     if (cert)
1598         CertFreeCertificateContext(cert);
1599     if (hstore)
1600         CertCloseStore(hstore, 0);
1601
1602     if (!certs)
1603         return 0;
1604
1605     /* Select the appropriate certificate */
1606
1607     client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1608
1609     /* Set the selected certificate and free the rest */
1610
1611     for (i = 0; i < sk_X509_num(certs); i++) {
1612         x = sk_X509_value(certs, i);
1613         if (i == client_cert_idx)
1614             *pcert = x;
1615         else {
1616             key = X509_get_ex_data(x, cert_capi_idx);
1617             capi_free_key(key);
1618             X509_free(x);
1619         }
1620     }
1621
1622     sk_X509_free(certs);
1623
1624     if (!*pcert)
1625         return 0;
1626
1627     /* Setup key for selected certificate */
1628
1629     key = X509_get_ex_data(*pcert, cert_capi_idx);
1630     *pkey = capi_get_pkey(e, key);
1631     X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1632
1633     return 1;
1634
1635 }
1636
1637 /* Simple client cert selection function: always select first */
1638
1639 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1640 {
1641     return 0;
1642 }
1643
1644 #  ifdef OPENSSL_CAPIENG_DIALOG
1645
1646 /*
1647  * More complex cert selection function, using standard function
1648  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1649  */
1650
1651 /*
1652  * Definitions which are in cryptuiapi.h but this is not present in older
1653  * versions of headers.
1654  */
1655
1656 #   ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1657 #    define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1658 #    define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1659 #   endif
1660
1661 #   define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1662 #   define dlg_prompt L"Select a certificate to use for authentication"
1663 #   define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1664                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1665
1666 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1667 {
1668     X509 *x;
1669     HCERTSTORE dstore;
1670     PCCERT_CONTEXT cert;
1671     CAPI_CTX *ctx;
1672     CAPI_KEY *key;
1673     HWND hwnd;
1674     int i, idx = -1;
1675     if (sk_X509_num(certs) == 1)
1676         return 0;
1677     ctx = ENGINE_get_ex_data(e, capi_idx);
1678     /* Create an in memory store of certificates */
1679     dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1680                            CERT_STORE_CREATE_NEW_FLAG, NULL);
1681     if (!dstore) {
1682         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1683         capi_addlasterror();
1684         goto err;
1685     }
1686     /* Add all certificates to store */
1687     for (i = 0; i < sk_X509_num(certs); i++) {
1688         x = sk_X509_value(certs, i);
1689         key = X509_get_ex_data(x, cert_capi_idx);
1690
1691         if (!CertAddCertificateContextToStore(dstore, key->pcert,
1692                                               CERT_STORE_ADD_NEW, NULL)) {
1693             CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1694             capi_addlasterror();
1695             goto err;
1696         }
1697
1698     }
1699     hwnd = GetForegroundWindow();
1700     if (!hwnd)
1701         hwnd = GetActiveWindow();
1702     if (!hwnd && ctx->getconswindow)
1703         hwnd = ctx->getconswindow();
1704     /* Call dialog to select one */
1705     cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1706                               dlg_columns, 0, NULL);
1707
1708     /* Find matching cert from list */
1709     if (cert) {
1710         for (i = 0; i < sk_X509_num(certs); i++) {
1711             x = sk_X509_value(certs, i);
1712             key = X509_get_ex_data(x, cert_capi_idx);
1713             if (CertCompareCertificate
1714                 (X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, cert->pCertInfo,
1715                  key->pcert->pCertInfo)) {
1716                 idx = i;
1717                 break;
1718             }
1719         }
1720     }
1721
1722  err:
1723     if (dstore)
1724         CertCloseStore(dstore, 0);
1725     return idx;
1726
1727 }
1728 #  endif
1729
1730 # endif
1731 #else                           /* !WIN32 */
1732 # include <openssl/engine.h>
1733 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
1734 OPENSSL_EXPORT
1735     int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns)
1736 {
1737     return 0;
1738 }
1739
1740 IMPLEMENT_DYNAMIC_CHECK_FN()
1741 # endif
1742 #endif