ppccap.c: fix compiler warning and perform sanity check outside signal masking.
[openssl.git] / engines / e_capi.c
1 /* engines/e_capi.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3  * project.
4  */
5 /* ====================================================================
6  * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer. 
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in
17  *    the documentation and/or other materials provided with the
18  *    distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *    software must display the following acknowledgment:
22  *    "This product includes software developed by the OpenSSL Project
23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  *    endorse or promote products derived from this software without
27  *    prior written permission. For written permission, please contact
28  *    licensing@OpenSSL.org.
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  *    nor may "OpenSSL" appear in their names without prior written
32  *    permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  */
53
54
55 #include <stdio.h>
56 #include <string.h>
57 #include <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 #include <openssl/engine.h>
87 #include <openssl/pem.h>
88 #include <openssl/x509v3.h>
89
90 #include "e_capi_err.h"
91 #include "e_capi_err.c"
92
93
94 static const char *engine_capi_id = "capi";
95 static const char *engine_capi_name = "CryptoAPI ENGINE";
96
97 typedef struct CAPI_CTX_st CAPI_CTX;
98 typedef struct CAPI_KEY_st CAPI_KEY;
99
100 static void capi_addlasterror(void);
101 static void capi_adderror(DWORD err);
102
103 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...);
104
105 static int capi_list_providers(CAPI_CTX *ctx, BIO *out);
106 static int capi_list_containers(CAPI_CTX *ctx, BIO *out);
107 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *storename);
108 void capi_free_key(CAPI_KEY *key);
109
110 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore);
111
112 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id);
113
114 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
115         UI_METHOD *ui_method, void *callback_data);
116 static int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
117              unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
118 static int capi_rsa_priv_enc(int flen, const unsigned char *from,
119                 unsigned char *to, RSA *rsa, int padding);
120 static int capi_rsa_priv_dec(int flen, const unsigned char *from,
121                 unsigned char *to, RSA *rsa, int padding);
122 static int capi_rsa_free(RSA *rsa);
123
124 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
125                                                         DSA *dsa);
126 static int capi_dsa_free(DSA *dsa);
127
128 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
129         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
130         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
131
132 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
133 #ifdef OPENSSL_CAPIENG_DIALOG
134 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
135 #endif
136
137 typedef PCCERT_CONTEXT (WINAPI *CERTDLG)(HCERTSTORE, HWND, LPCWSTR,
138                                                 LPCWSTR, DWORD, DWORD,
139                                                 void *);
140 typedef HWND (WINAPI *GETCONSWIN)(void);
141
142 /* This structure contains CAPI ENGINE specific data:
143  * it contains various global options and affects how
144  * other functions behave.
145  */
146
147 #define CAPI_DBG_TRACE  2
148 #define CAPI_DBG_ERROR  1
149
150 struct CAPI_CTX_st {
151         int debug_level;
152         char *debug_file;
153         /* Parameters to use for container lookup */
154         DWORD keytype;
155         LPSTR cspname;
156         DWORD csptype;
157         /* Certificate store name to use */
158         LPSTR storename;
159         LPSTR ssl_client_store;
160         /* System store flags */
161         DWORD store_flags;
162
163 /* Lookup string meanings in load_private_key */
164 /* Substring of subject: uses "storename" */
165 #define CAPI_LU_SUBSTR          1
166 /* Friendly name: uses storename */
167 #define CAPI_LU_FNAME           2
168 /* Container name: uses cspname, keytype */
169 #define CAPI_LU_CONTNAME        3
170         int lookup_method;
171 /* Info to dump with dumpcerts option */
172 /* Issuer and serial name strings */
173 #define CAPI_DMP_SUMMARY        0x1
174 /* Friendly name */
175 #define CAPI_DMP_FNAME          0x2
176 /* Full X509_print dump */
177 #define CAPI_DMP_FULL           0x4
178 /* Dump PEM format certificate */
179 #define CAPI_DMP_PEM            0x8
180 /* Dump pseudo key (if possible) */
181 #define CAPI_DMP_PSKEY          0x10
182 /* Dump key info (if possible) */
183 #define CAPI_DMP_PKEYINFO       0x20
184
185         DWORD dump_flags;
186         int (*client_cert_select)(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
187
188         CERTDLG certselectdlg;
189         GETCONSWIN getconswindow;
190 };
191
192
193 static CAPI_CTX *capi_ctx_new();
194 static void capi_ctx_free(CAPI_CTX *ctx);
195 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
196 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
197
198 #define CAPI_CMD_LIST_CERTS             ENGINE_CMD_BASE
199 #define CAPI_CMD_LOOKUP_CERT            (ENGINE_CMD_BASE + 1)
200 #define CAPI_CMD_DEBUG_LEVEL            (ENGINE_CMD_BASE + 2)
201 #define CAPI_CMD_DEBUG_FILE             (ENGINE_CMD_BASE + 3)
202 #define CAPI_CMD_KEYTYPE                (ENGINE_CMD_BASE + 4)
203 #define CAPI_CMD_LIST_CSPS              (ENGINE_CMD_BASE + 5)
204 #define CAPI_CMD_SET_CSP_IDX            (ENGINE_CMD_BASE + 6)
205 #define CAPI_CMD_SET_CSP_NAME           (ENGINE_CMD_BASE + 7)
206 #define CAPI_CMD_SET_CSP_TYPE           (ENGINE_CMD_BASE + 8)
207 #define CAPI_CMD_LIST_CONTAINERS        (ENGINE_CMD_BASE + 9)
208 #define CAPI_CMD_LIST_OPTIONS           (ENGINE_CMD_BASE + 10)
209 #define CAPI_CMD_LOOKUP_METHOD          (ENGINE_CMD_BASE + 11)
210 #define CAPI_CMD_STORE_NAME             (ENGINE_CMD_BASE + 12)
211 #define CAPI_CMD_STORE_FLAGS            (ENGINE_CMD_BASE + 13)
212
213 static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
214         {CAPI_CMD_LIST_CERTS,
215                 "list_certs",
216                 "List all certificates in store",
217                 ENGINE_CMD_FLAG_NO_INPUT},
218         {CAPI_CMD_LOOKUP_CERT,
219                 "lookup_cert",
220                 "Lookup and output certificates",
221                 ENGINE_CMD_FLAG_STRING},
222         {CAPI_CMD_DEBUG_LEVEL,
223                 "debug_level",
224                 "debug level (1=errors, 2=trace)",
225                 ENGINE_CMD_FLAG_NUMERIC},
226         {CAPI_CMD_DEBUG_FILE,
227                 "debug_file",
228                 "debugging filename)",
229                 ENGINE_CMD_FLAG_STRING},
230         {CAPI_CMD_KEYTYPE,
231                 "key_type",
232                 "Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
233                 ENGINE_CMD_FLAG_NUMERIC},
234         {CAPI_CMD_LIST_CSPS,
235                 "list_csps",
236                 "List all CSPs",
237                 ENGINE_CMD_FLAG_NO_INPUT},
238         {CAPI_CMD_SET_CSP_IDX,
239                 "csp_idx",
240                 "Set CSP by index",
241                 ENGINE_CMD_FLAG_NUMERIC},
242         {CAPI_CMD_SET_CSP_NAME,
243                 "csp_name",
244                 "Set CSP name, (default CSP used if not specified)",
245                 ENGINE_CMD_FLAG_STRING},
246         {CAPI_CMD_SET_CSP_TYPE,
247                 "csp_type",
248                 "Set CSP type, (default RSA_PROV_FULL)",
249                 ENGINE_CMD_FLAG_NUMERIC},
250         {CAPI_CMD_LIST_CONTAINERS,
251                 "list_containers",
252                 "list container names",
253                 ENGINE_CMD_FLAG_NO_INPUT},
254         {CAPI_CMD_LIST_OPTIONS,
255                 "list_options",
256                 "Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
257                 "32=private key info)",
258                 ENGINE_CMD_FLAG_NUMERIC},
259         {CAPI_CMD_LOOKUP_METHOD,
260                 "lookup_method",
261                 "Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
262                 ENGINE_CMD_FLAG_NUMERIC},
263         {CAPI_CMD_STORE_NAME,
264                 "store_name",
265                 "certificate store name, default \"MY\"",
266                 ENGINE_CMD_FLAG_STRING},
267         {CAPI_CMD_STORE_FLAGS,
268                 "store_flags",
269                 "Certificate store flags: 1 = system store",
270                 ENGINE_CMD_FLAG_NUMERIC},
271
272         {0, NULL, NULL, 0}
273         };
274
275 static int capi_idx = -1;
276 static int rsa_capi_idx = -1;
277 static int dsa_capi_idx = -1;
278 static int cert_capi_idx = -1;
279
280 static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
281         {
282         int ret = 1;
283         CAPI_CTX *ctx;
284         BIO *out;
285         if (capi_idx == -1)
286                 {
287                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
288                 return 0;
289                 }
290         ctx = ENGINE_get_ex_data(e, capi_idx);
291         out = BIO_new_fp(stdout, BIO_NOCLOSE);
292         switch (cmd)
293                 {
294                 case CAPI_CMD_LIST_CSPS:
295                 ret = capi_list_providers(ctx, out);
296                 break;
297
298                 case CAPI_CMD_LIST_CERTS:
299                 ret = capi_list_certs(ctx, out, NULL);
300                 break;
301
302                 case CAPI_CMD_LOOKUP_CERT:
303                 ret = capi_list_certs(ctx, out, p);
304                 break;
305
306                 case CAPI_CMD_LIST_CONTAINERS:
307                 ret = capi_list_containers(ctx, out);
308                 break;
309
310                 case CAPI_CMD_STORE_NAME:
311                 if (ctx->storename)
312                         OPENSSL_free(ctx->storename);
313                 ctx->storename = BUF_strdup(p);
314                 CAPI_trace(ctx, "Setting store name to %s\n", p);
315                 break;
316
317                 case CAPI_CMD_STORE_FLAGS:
318                 if (i & 1)
319                         {
320                         ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
321                         ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
322                         }
323                 else
324                         {
325                         ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
326                         ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
327                         }
328                 CAPI_trace(ctx, "Setting flags to %d\n", i);
329                 break;
330
331                 case CAPI_CMD_DEBUG_LEVEL:
332                 ctx->debug_level = (int)i;
333                 CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
334                 break;
335
336                 case CAPI_CMD_DEBUG_FILE:
337                 ctx->debug_file = BUF_strdup(p);
338                 CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
339                 break;
340
341                 case CAPI_CMD_KEYTYPE:
342                 ctx->keytype = i;
343                 CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
344                 break;
345
346                 case CAPI_CMD_SET_CSP_IDX:
347                 ret = capi_ctx_set_provname_idx(ctx, i);
348                 break;
349
350                 case CAPI_CMD_LIST_OPTIONS:
351                 ctx->dump_flags = i;
352                 break;
353
354                 case CAPI_CMD_LOOKUP_METHOD:
355                 if (i < 1 || i > 3)
356                         {
357                         CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
358                         return 0;
359                         }
360                 ctx->lookup_method = i;
361                 break;
362
363                 case CAPI_CMD_SET_CSP_NAME:
364                 ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
365                 break;
366
367                 case CAPI_CMD_SET_CSP_TYPE:
368                 ctx->csptype = i;
369                 break;
370
371                 default:
372                 CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
373                 ret = 0;
374         }
375
376         BIO_free(out);
377         return ret;
378
379         }
380
381 static RSA_METHOD capi_rsa_method =
382         {
383         "CryptoAPI RSA method",
384         0,                              /* pub_enc */
385         0,                              /* pub_dec */
386         capi_rsa_priv_enc,              /* priv_enc */
387         capi_rsa_priv_dec,              /* priv_dec */
388         0,                              /* rsa_mod_exp */
389         0,                              /* bn_mod_exp */
390         0,                              /* init */
391         capi_rsa_free,                  /* finish */
392         RSA_FLAG_SIGN_VER,              /* flags */
393         NULL,                           /* app_data */
394         capi_rsa_sign,                  /* rsa_sign */
395         0                               /* rsa_verify */
396         };
397
398 static DSA_METHOD capi_dsa_method =
399         {
400         "CryptoAPI DSA method",
401         capi_dsa_do_sign,               /* dsa_do_sign */
402         0,                              /* dsa_sign_setup */
403         0,                              /* dsa_do_verify */
404         0,                              /* dsa_mod_exp */
405         0,                              /* bn_mod_exp */
406         0,                              /* init */
407         capi_dsa_free,                  /* finish */
408         0,                              /* flags */
409         NULL,                           /* app_data */
410         0,                              /* dsa_paramgen */
411         0                               /* dsa_keygen */
412         };
413
414 static int capi_init(ENGINE *e)
415         {
416         CAPI_CTX *ctx;
417         const RSA_METHOD *ossl_rsa_meth;
418         const DSA_METHOD *ossl_dsa_meth;
419         capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
420         cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
421
422         ctx = capi_ctx_new();
423         if (!ctx || (capi_idx < 0))
424                 goto memerr;
425
426         ENGINE_set_ex_data(e, capi_idx, ctx);
427         /* Setup RSA_METHOD */
428         rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
429         ossl_rsa_meth = RSA_PKCS1_SSLeay();
430         capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
431         capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
432         capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
433         capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
434
435         /* Setup DSA Method */
436         dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
437         ossl_dsa_meth = DSA_OpenSSL();
438         capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
439         capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
440         capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
441
442 #ifdef OPENSSL_CAPIENG_DIALOG
443         {
444         HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
445         HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
446         if (cryptui)
447                 ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
448         if (kernel)
449                 ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
450         if (cryptui && !OPENSSL_isservice())
451                 ctx->client_cert_select = cert_select_dialog;
452         }
453 #endif
454                 
455
456         return 1;
457
458         memerr:
459         CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
460         return 0;
461
462         return 1;
463         }
464
465 static int capi_destroy(ENGINE *e)
466         {
467         ERR_unload_CAPI_strings();
468         return 1;
469         }
470
471 static int capi_finish(ENGINE *e)
472         {
473         CAPI_CTX *ctx;
474         ctx = ENGINE_get_ex_data(e, capi_idx);
475         capi_ctx_free(ctx);
476         ENGINE_set_ex_data(e, capi_idx, NULL);
477         return 1;
478         }
479
480
481 /* CryptoAPI key application data. This contains
482  * a handle to the private key container (for sign operations)
483  * and a handle to the key (for decrypt operations).
484  */
485
486 struct CAPI_KEY_st
487         {
488         /* Associated certificate context (if any) */
489         PCCERT_CONTEXT pcert;
490         HCRYPTPROV hprov;
491         HCRYPTKEY key;
492         DWORD keyspec;
493         };
494
495 static int bind_capi(ENGINE *e)
496         {
497         if (!ENGINE_set_id(e, engine_capi_id)
498                 || !ENGINE_set_name(e, engine_capi_name)
499                 || !ENGINE_set_init_function(e, capi_init)
500                 || !ENGINE_set_finish_function(e, capi_finish)
501                 || !ENGINE_set_destroy_function(e, capi_destroy)
502                 || !ENGINE_set_RSA(e, &capi_rsa_method)
503                 || !ENGINE_set_DSA(e, &capi_dsa_method)
504                 || !ENGINE_set_load_privkey_function(e, capi_load_privkey)
505                 || !ENGINE_set_load_ssl_client_cert_function(e,
506                                                 capi_load_ssl_client_cert)
507                 || !ENGINE_set_cmd_defns(e, capi_cmd_defns)
508                 || !ENGINE_set_ctrl_function(e, capi_ctrl))
509                         return 0;
510         ERR_load_CAPI_strings();
511
512         return 1;
513
514         }
515
516 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
517 static int bind_helper(ENGINE *e, const char *id)
518         {
519         if(id && (strcmp(id, engine_capi_id) != 0))
520                 return 0;
521         if(!bind_capi(e))
522                 return 0;
523         return 1;
524         }       
525 IMPLEMENT_DYNAMIC_CHECK_FN()
526 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
527 #else
528 static ENGINE *engine_capi(void)
529         {
530         ENGINE *ret = ENGINE_new();
531         if(!ret)
532                 return NULL;
533         if(!bind_capi(ret))
534                 {
535                 ENGINE_free(ret);
536                 return NULL;
537                 }
538         return ret;
539         }
540
541 void ENGINE_load_capi(void)
542         {
543         /* Copied from eng_[openssl|dyn].c */
544         ENGINE *toadd = engine_capi();
545         if(!toadd) return;
546         ENGINE_add(toadd);
547         ENGINE_free(toadd);
548         ERR_clear_error();
549         }
550 #endif
551
552
553 static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
554         {
555         int i;
556         /* Reverse buffer in place: since this is a keyblob structure
557          * that will be freed up after conversion anyway it doesn't 
558          * matter if we change it.
559          */
560         for(i = 0; i < binlen / 2; i++)
561                 {
562                 unsigned char c;
563                 c = bin[i];
564                 bin[i] = bin[binlen - i - 1];
565                 bin[binlen - i - 1] = c;
566                 }
567
568         if (!BN_bin2bn(bin, binlen, bn))
569                 return 0;
570         return 1;
571         }
572
573 /* Given a CAPI_KEY get an EVP_PKEY structure */
574
575 static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
576         {
577         unsigned char *pubkey = NULL;
578         DWORD len;
579         BLOBHEADER *bh;
580         RSA *rkey = NULL;
581         DSA *dkey = NULL;
582         EVP_PKEY *ret = NULL;
583         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
584                 {
585                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
586                 capi_addlasterror();
587                 return NULL;
588                 }
589
590         pubkey = OPENSSL_malloc(len);
591
592         if (!pubkey)
593                 goto memerr;
594
595         if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
596                 {
597                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
598                 capi_addlasterror();
599                 goto err;
600                 }
601
602         bh = (BLOBHEADER *)pubkey;
603         if (bh->bType != PUBLICKEYBLOB)
604                 {
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                 {
610                 RSAPUBKEY *rp;
611                 DWORD rsa_modlen;
612                 unsigned char *rsa_modulus;
613                 rp = (RSAPUBKEY *)(bh + 1);
614                 if (rp->magic != 0x31415352)
615                         {
616                         char magstr[10];
617                         BIO_snprintf(magstr, 10, "%lx", rp->magic);
618                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
619                         ERR_add_error_data(2, "magic=0x", magstr);
620                         goto err;
621                         }
622                 rsa_modulus = (unsigned char *)(rp + 1);
623                 rkey = RSA_new_method(eng);
624                 if (!rkey)
625                         goto memerr;
626
627                 rkey->e = BN_new();
628                 rkey->n = BN_new();
629
630                 if (!rkey->e || !rkey->n)
631                         goto memerr;
632
633                 if (!BN_set_word(rkey->e, rp->pubexp))
634                         goto memerr;
635
636                 rsa_modlen = rp->bitlen / 8;
637                 if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
638                         goto memerr;
639
640                 RSA_set_ex_data(rkey, rsa_capi_idx, key);
641
642                 if (!(ret = EVP_PKEY_new()))
643                         goto memerr;
644
645                 EVP_PKEY_assign_RSA(ret, rkey);
646                 rkey = NULL;
647
648                 }
649         else if (bh->aiKeyAlg == CALG_DSS_SIGN)
650                 {
651                 DSSPUBKEY *dp;
652                 DWORD dsa_plen;
653                 unsigned char *btmp;
654                 dp = (DSSPUBKEY *)(bh + 1);
655                 if (dp->magic != 0x31535344)
656                         {
657                         char magstr[10];
658                         BIO_snprintf(magstr, 10, "%lx", dp->magic);
659                         CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
660                         ERR_add_error_data(2, "magic=0x", magstr);
661                         goto err;
662                         }
663                 dsa_plen = dp->bitlen / 8;
664                 btmp = (unsigned char *)(dp + 1);
665                 dkey = DSA_new_method(eng);
666                 if (!dkey)
667                         goto memerr;
668                 dkey->p = BN_new();
669                 dkey->q = BN_new();
670                 dkey->g = BN_new();
671                 dkey->pub_key = BN_new();
672                 if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
673                         goto memerr;
674                 if (!lend_tobn(dkey->p, btmp, dsa_plen))
675                         goto memerr;
676                 btmp += dsa_plen;
677                 if (!lend_tobn(dkey->q, btmp, 20))
678                         goto memerr;
679                 btmp += 20;
680                 if (!lend_tobn(dkey->g, btmp, dsa_plen))
681                         goto memerr;
682                 btmp += dsa_plen;
683                 if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
684                         goto memerr;
685                 btmp += dsa_plen;
686
687                 DSA_set_ex_data(dkey, dsa_capi_idx, key);
688
689                 if (!(ret = EVP_PKEY_new()))
690                         goto memerr;
691
692                 EVP_PKEY_assign_DSA(ret, dkey);
693                 dkey = NULL;
694                 }
695         else
696                 {
697                 char algstr[10];
698                 BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
699                 CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
700                 ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
701                 goto err;
702                 }
703
704
705         err:
706         if (pubkey)
707                 OPENSSL_free(pubkey);
708         if (!ret)
709                 {
710                 if (rkey)
711                         RSA_free(rkey);
712                 if (dkey)
713                         DSA_free(dkey);
714                 }
715
716         return ret;
717
718 memerr:
719         CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
720         goto err;
721
722         }
723
724 static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
725         UI_METHOD *ui_method, void *callback_data)
726         {
727         CAPI_CTX *ctx;
728         CAPI_KEY *key;
729         EVP_PKEY *ret;
730         ctx = ENGINE_get_ex_data(eng, capi_idx);
731
732         if (!ctx)
733                 {
734                 CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
735                 return NULL;
736                 }
737
738         key = capi_find_key(ctx, key_id);
739
740         if (!key)
741                 return NULL;
742
743         ret = capi_get_pkey(eng, key);
744
745         if (!ret)
746                 capi_free_key(key);
747         return ret;
748
749         }
750
751 /* CryptoAPI RSA operations */
752
753 int capi_rsa_priv_enc(int flen, const unsigned char *from,
754                 unsigned char *to, RSA *rsa, int padding)
755         {
756         CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
757         return -1;
758         }
759
760 int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
761              unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
762         {
763         ALG_ID alg;
764         HCRYPTHASH hash;
765         DWORD slen;
766         unsigned int i;
767         int ret = -1;
768         CAPI_KEY *capi_key;
769         CAPI_CTX *ctx;
770
771         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
772
773         CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
774
775         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
776         if (!capi_key)
777                 {
778                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
779                 return -1;
780                 }
781 /* Convert the signature type to a CryptoAPI algorithm ID */
782         switch(dtype)
783                 {
784         case NID_sha1:
785                 alg = CALG_SHA1;
786                 break;
787
788         case NID_md5:
789                 alg = CALG_MD5;
790                 break;
791
792         case NID_md5_sha1:
793                 alg = CALG_SSL3_SHAMD5;
794                 break;
795         default:
796                 {
797                 char algstr[10];
798                 BIO_snprintf(algstr, 10, "%lx", dtype);
799                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
800                 ERR_add_error_data(2, "NID=0x", algstr);
801                 return -1;
802                 }
803         }
804
805
806
807 /* Create the hash object */
808         if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
809                 {
810                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
811                 capi_addlasterror();
812                 return -1;
813                 }
814 /* Set the hash value to the value passed */
815
816         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
817                 {
818                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
819                 capi_addlasterror();
820                 goto err;
821                 }
822
823
824 /* Finally sign it */
825         slen = RSA_size(rsa);
826         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
827                 {
828                 CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
829                 capi_addlasterror();
830                 goto err;
831                 }
832         else
833                 {
834                 ret = 1;
835                 /* Inplace byte reversal of signature */
836                 for(i = 0; i < slen / 2; i++)
837                         {
838                         unsigned char c;
839                         c = sigret[i];
840                         sigret[i] = sigret[slen - i - 1];
841                         sigret[slen - i - 1] = c;
842                         }
843                 *siglen = slen;
844                 }
845
846         /* Now cleanup */
847
848 err:
849         CryptDestroyHash(hash);
850
851         return ret;
852         }
853
854 int capi_rsa_priv_dec(int flen, const unsigned char *from,
855                 unsigned char *to, RSA *rsa, int padding)
856         {
857         int i;
858         unsigned char *tmpbuf;
859         CAPI_KEY *capi_key;
860         CAPI_CTX *ctx;
861         ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
862
863         CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
864
865
866         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
867         if (!capi_key)
868                 {
869                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
870                 return -1;
871                 }
872
873         if(padding != RSA_PKCS1_PADDING)
874                 {
875                 char errstr[10];
876                 BIO_snprintf(errstr, 10, "%d", padding);
877                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
878                 ERR_add_error_data(2, "padding=", errstr);
879                 return -1;
880                 }
881
882         /* Create temp reverse order version of input */
883         if(!(tmpbuf = OPENSSL_malloc(flen)) ) 
884                 {
885                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
886                 return -1;
887                 }
888         for(i = 0; i < flen; i++)
889                 tmpbuf[flen - i - 1] = from[i];
890         
891         /* Finally decrypt it */
892         if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
893                 {
894                 CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
895                 capi_addlasterror();
896                 OPENSSL_free(tmpbuf);
897                 return -1;
898                 } 
899         else memcpy(to, tmpbuf, flen);
900
901         OPENSSL_free(tmpbuf);
902
903         return flen;
904         }
905
906 static int capi_rsa_free(RSA *rsa)
907         {
908         CAPI_KEY *capi_key;
909         capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
910         capi_free_key(capi_key);
911         RSA_set_ex_data(rsa, rsa_capi_idx, 0);
912         return 1;
913         }
914
915 /* CryptoAPI DSA operations */
916
917 static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
918                                                                 DSA *dsa)
919         {
920         HCRYPTHASH hash;
921         DWORD slen;
922         DSA_SIG *ret = NULL;
923         CAPI_KEY *capi_key;
924         CAPI_CTX *ctx;
925         unsigned char csigbuf[40];
926
927         ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
928
929         CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
930
931         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
932
933         if (!capi_key)
934                 {
935                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
936                 return NULL;
937                 }
938
939         if (dlen != 20)
940                 {
941                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
942                 return NULL;
943                 }
944
945         /* Create the hash object */
946         if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
947                 {
948                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
949                 capi_addlasterror();
950                 return NULL;
951                 }
952
953         /* Set the hash value to the value passed */
954         if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
955                 {
956                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
957                 capi_addlasterror();
958                 goto err;
959                 }
960
961
962         /* Finally sign it */
963         slen = sizeof(csigbuf);
964         if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
965                 {
966                 CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
967                 capi_addlasterror();
968                 goto err;
969                 }
970         else
971                 {
972                 ret = DSA_SIG_new();
973                 if (!ret)
974                         goto err;
975                 ret->r = BN_new();
976                 ret->s = BN_new();
977                 if (!ret->r || !ret->s)
978                         goto err;
979                 if (!lend_tobn(ret->r, csigbuf, 20)
980                         || !lend_tobn(ret->s, csigbuf + 20, 20))
981                         {
982                         DSA_SIG_free(ret);
983                         ret = NULL;
984                         goto err;
985                         }
986                 }
987
988         /* Now cleanup */
989
990 err:
991         OPENSSL_cleanse(csigbuf, 40);
992         CryptDestroyHash(hash);
993         return ret;
994         }
995
996 static int capi_dsa_free(DSA *dsa)
997         {
998         CAPI_KEY *capi_key;
999         capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
1000         capi_free_key(capi_key);
1001         DSA_set_ex_data(dsa, dsa_capi_idx, 0);
1002         return 1;
1003         }
1004
1005 static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
1006         {
1007         BIO *out;
1008
1009         if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
1010                 return;
1011         out = BIO_new_file(ctx->debug_file, "a+");
1012         BIO_vprintf(out, format, argptr);
1013         BIO_free(out);
1014         }
1015
1016 static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
1017         {
1018         va_list args;
1019         va_start(args, format);
1020         capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
1021         va_end(args);
1022         }
1023
1024 static void capi_addlasterror(void)
1025         {
1026         capi_adderror(GetLastError());
1027         }
1028
1029 static void capi_adderror(DWORD err)
1030         {
1031         char errstr[10];
1032         BIO_snprintf(errstr, 10, "%lX", err);
1033         ERR_add_error_data(2, "Error code= 0x", errstr);
1034         }
1035
1036 static char *wide_to_asc(LPWSTR wstr)
1037         {
1038         char *str;
1039         int len_0,sz;
1040
1041         if (!wstr)
1042                 return NULL;
1043         len_0 = (int)wcslen(wstr)+1;    /* WideCharToMultiByte expects int */
1044         sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
1045         if (!sz)
1046                 {
1047                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1048                 return NULL;
1049                 }
1050         str = OPENSSL_malloc(sz);
1051         if (!str)
1052                 {
1053                 CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
1054                 return NULL;
1055                 }
1056         if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
1057                 {
1058                 OPENSSL_free(str);
1059                 CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
1060                 return NULL;
1061                 }
1062         return str;
1063         }
1064
1065 static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
1066         {
1067         LPSTR name;
1068         DWORD len, err;
1069         CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
1070         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
1071                 {
1072                 err = GetLastError();
1073                 if (err == ERROR_NO_MORE_ITEMS)
1074                         return 2;
1075                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1076                 capi_adderror(err);
1077                 return 0;
1078                 }
1079         name = OPENSSL_malloc(len);
1080         if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
1081                 {
1082                 err = GetLastError();
1083                 if (err == ERROR_NO_MORE_ITEMS)
1084                         return 2;
1085                 CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
1086                 capi_adderror(err);
1087                 return 0;
1088                 }
1089         *pname = name;
1090         CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
1091
1092         return 1;
1093         }
1094
1095 static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
1096         {
1097         DWORD idx, ptype;
1098         int ret;
1099         LPSTR provname = NULL;
1100         CAPI_trace(ctx, "capi_list_providers\n");
1101         BIO_printf(out, "Available CSPs:\n");
1102         for(idx = 0; ; idx++)
1103                 {
1104                 ret = capi_get_provname(ctx, &provname, &ptype, idx);
1105                 if (ret == 2)
1106                         break;
1107                 if (ret == 0)
1108                         break;
1109                 BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
1110                 OPENSSL_free(provname);
1111                 }
1112         return 1;
1113         }
1114
1115 static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
1116         {
1117         int ret = 1;
1118         HCRYPTPROV hprov;
1119         DWORD err, idx, flags, buflen = 0, clen;
1120         LPSTR cname;
1121         CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
1122         if (!CryptAcquireContextA(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
1123                 {
1124                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1125                 capi_addlasterror();
1126                 return 0;
1127                 }
1128         if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
1129                 {
1130                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1131                 capi_addlasterror();
1132                 return 0;
1133                 }
1134         CAPI_trace(ctx, "Got max container len %d\n", buflen);
1135         if (buflen == 0)
1136                 buflen = 1024;
1137         cname = OPENSSL_malloc(buflen);
1138         if (!cname)
1139                 {
1140                 CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
1141                 goto err;
1142                 }
1143
1144         for (idx = 0;;idx++)
1145                 {
1146                 clen = buflen;
1147                 cname[0] = 0;
1148
1149                 if (idx == 0)
1150                         flags = CRYPT_FIRST;
1151                 else
1152                         flags = 0;
1153                 if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
1154                         {
1155                         err = GetLastError();
1156                         if (err == ERROR_NO_MORE_ITEMS)
1157                                 goto done;
1158                         CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
1159                         capi_adderror(err);
1160                         goto err;
1161                         }
1162                 CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
1163                 if (!cname[0] && (clen == buflen))
1164                         {
1165                         CAPI_trace(ctx, "Enumerate bug: using workaround\n");
1166                         goto done;
1167                         }
1168                 BIO_printf(out, "%d. %s\n", idx, cname);
1169                 }
1170         err:
1171
1172         ret = 0;
1173
1174         done:
1175         if (cname)
1176                 OPENSSL_free(cname);
1177         CryptReleaseContext(hprov, 0);
1178
1179         return ret;
1180         }
1181
1182 CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1183         {
1184         DWORD len;
1185         CRYPT_KEY_PROV_INFO *pinfo;
1186         
1187         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
1188                 return NULL;
1189         pinfo = OPENSSL_malloc(len);
1190         if (!pinfo)
1191                 {
1192                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
1193                 return NULL;
1194                 }
1195         if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
1196                 {
1197                 CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
1198                 capi_addlasterror();
1199                 OPENSSL_free(pinfo);
1200                 return NULL;
1201                 }
1202         return pinfo;
1203         }
1204
1205 static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
1206         {
1207         char *provname = NULL, *contname = NULL;
1208         if (!pinfo)
1209                 {
1210                 BIO_printf(out, "  No Private Key\n");
1211                 return;
1212                 }
1213         provname = wide_to_asc(pinfo->pwszProvName);
1214         contname = wide_to_asc(pinfo->pwszContainerName);
1215         if (!provname || !contname)
1216                 goto err;
1217
1218         BIO_printf(out, "  Private Key Info:\n");
1219         BIO_printf(out, "    Provider Name:  %s, Provider Type %d\n", provname, pinfo->dwProvType);
1220         BIO_printf(out, "    Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
1221         err:
1222         if (provname)
1223                 OPENSSL_free(provname);
1224         if (contname)
1225                 OPENSSL_free(contname);
1226         }
1227
1228 char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1229         {
1230         LPWSTR wfname;
1231         DWORD dlen;
1232
1233         CAPI_trace(ctx, "capi_cert_get_fname\n");
1234         if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
1235                 return NULL;
1236         wfname = OPENSSL_malloc(dlen);
1237         if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
1238                 {
1239                 char *fname = wide_to_asc(wfname);
1240                 OPENSSL_free(wfname);
1241                 return fname;
1242                 }
1243         CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
1244         capi_addlasterror();
1245
1246         OPENSSL_free(wfname);
1247         return NULL;
1248         }
1249
1250
1251 void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
1252         {
1253         X509 *x;
1254         unsigned char *p;
1255         unsigned long flags = ctx->dump_flags;
1256         if (flags & CAPI_DMP_FNAME)
1257                 {
1258                 char *fname;
1259                 fname = capi_cert_get_fname(ctx, cert);
1260                 if (fname)
1261                         {
1262                         BIO_printf(out, "  Friendly Name \"%s\"\n", fname);
1263                         OPENSSL_free(fname);
1264                         }
1265                 else
1266                         BIO_printf(out, "  <No Friendly Name>\n");
1267                 }
1268
1269         p = cert->pbCertEncoded;
1270         x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1271         if (!x)
1272                 BIO_printf(out, "  <Can't parse certificate>\n");
1273         if (flags & CAPI_DMP_SUMMARY)
1274                 {
1275                 BIO_printf(out, "  Subject: ");
1276                 X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
1277                 BIO_printf(out, "\n  Issuer: ");
1278                 X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
1279                 BIO_printf(out, "\n");
1280                 }
1281         if (flags & CAPI_DMP_FULL)
1282                 X509_print_ex(out, x, XN_FLAG_ONELINE,0);
1283
1284         if (flags & CAPI_DMP_PKEYINFO)
1285                 {
1286                 CRYPT_KEY_PROV_INFO *pinfo;
1287                 pinfo = capi_get_prov_info(ctx, cert);
1288                 capi_dump_prov_info(ctx, out, pinfo);
1289                 if (pinfo)
1290                         OPENSSL_free(pinfo);
1291                 }
1292
1293         if (flags & CAPI_DMP_PEM)
1294                 PEM_write_bio_X509(out, x);
1295         X509_free(x);
1296         }
1297
1298 HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
1299         {
1300         HCERTSTORE hstore;
1301
1302         if (!storename)
1303                 storename = ctx->storename;
1304         if (!storename)
1305                 storename = "MY";
1306         CAPI_trace(ctx, "Opening certificate store %s\n", storename);
1307
1308         hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0, 
1309                                 ctx->store_flags, storename);
1310         if (!hstore)
1311                 {
1312                 CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
1313                 capi_addlasterror();
1314                 }
1315         return hstore;
1316         }
1317
1318 int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
1319         {
1320         char *storename;
1321         int idx;
1322         int ret = 1;
1323         HCERTSTORE hstore;
1324         PCCERT_CONTEXT cert = NULL;
1325
1326         storename = ctx->storename;
1327         if (!storename)
1328                 storename = "MY";
1329         CAPI_trace(ctx, "Listing certs for store %s\n", storename);
1330
1331         hstore = capi_open_store(ctx, storename);
1332         if (!hstore)
1333                 return 0;
1334         if (id)
1335                 {
1336                 cert = capi_find_cert(ctx, id, hstore);
1337                 if (!cert)
1338                         {
1339                         ret = 0;
1340                         goto err;
1341                         }
1342                 capi_dump_cert(ctx, out, cert);
1343                 CertFreeCertificateContext(cert);
1344                 }
1345         else
1346                 {
1347                 for(idx = 0;;idx++)
1348                         {
1349                         LPWSTR fname = NULL;
1350                         cert = CertEnumCertificatesInStore(hstore, cert);
1351                         if (!cert)
1352                                 break;
1353                         BIO_printf(out, "Certificate %d\n", idx);
1354                         capi_dump_cert(ctx, out, cert);
1355                         }
1356                 }
1357         err:
1358         CertCloseStore(hstore, 0);
1359         return ret;
1360         }
1361
1362 static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
1363         {
1364         PCCERT_CONTEXT cert = NULL;
1365         char *fname = NULL;
1366         int match;
1367         switch(ctx->lookup_method)
1368                 {
1369                 case CAPI_LU_SUBSTR:
1370                         return CertFindCertificateInStore(hstore,
1371                                         X509_ASN_ENCODING, 0,
1372                                         CERT_FIND_SUBJECT_STR_A, id, NULL);
1373                 case CAPI_LU_FNAME:
1374                         for(;;)
1375                                 {
1376                                 cert = CertEnumCertificatesInStore(hstore, cert);
1377                                 if (!cert)
1378                                         return NULL;
1379                                 fname = capi_cert_get_fname(ctx, cert);
1380                                 if (fname)
1381                                         {
1382                                         if (strcmp(fname, id))
1383                                                 match = 0;
1384                                         else
1385                                                 match = 1;
1386                                         OPENSSL_free(fname);
1387                                         if (match)
1388                                                 return cert;
1389                                         }
1390                                 }
1391                 default:
1392                         return NULL;
1393                 }
1394         }
1395
1396 static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
1397         {
1398         CAPI_KEY *key;
1399         key = OPENSSL_malloc(sizeof(CAPI_KEY));
1400         CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n", 
1401                                                 contname, provname, ptype);
1402         if (!CryptAcquireContextA(&key->hprov, contname, provname, ptype, 0))
1403                 {
1404                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1405                 capi_addlasterror();
1406                 goto err;
1407                 }
1408         if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
1409                 {
1410                 CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
1411                 capi_addlasterror();
1412                 CryptReleaseContext(key->hprov, 0);
1413                 goto err;
1414                 }
1415         key->keyspec = keyspec;
1416         key->pcert = NULL;
1417         return key;
1418
1419         err:
1420         OPENSSL_free(key);
1421         return NULL;
1422         }
1423
1424 static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
1425         {
1426         CAPI_KEY *key = NULL;
1427         CRYPT_KEY_PROV_INFO *pinfo = NULL;
1428         char *provname = NULL, *contname = NULL;
1429         pinfo = capi_get_prov_info(ctx, cert);
1430         if (!pinfo)
1431                 goto err;
1432         provname = wide_to_asc(pinfo->pwszProvName);
1433         contname = wide_to_asc(pinfo->pwszContainerName);
1434         if (!provname || !contname)
1435                 goto err;
1436         key = capi_get_key(ctx, contname, provname,
1437                                 pinfo->dwProvType, pinfo->dwKeySpec);
1438
1439         err:
1440         if (pinfo)
1441                 OPENSSL_free(pinfo);
1442         if (provname)
1443                 OPENSSL_free(provname);
1444         if (contname)
1445                 OPENSSL_free(contname);
1446         return key;
1447         }
1448
1449 CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
1450         {
1451         PCCERT_CONTEXT cert;
1452         HCERTSTORE hstore;
1453         CAPI_KEY *key = NULL;
1454         switch (ctx->lookup_method)
1455                 {
1456                 case CAPI_LU_SUBSTR:
1457                 case CAPI_LU_FNAME:
1458                 hstore = capi_open_store(ctx, NULL);
1459                 if (!hstore)
1460                         return NULL;
1461                 cert = capi_find_cert(ctx, id, hstore);
1462                 if (cert)
1463                         {
1464                         key = capi_get_cert_key(ctx, cert);
1465                         CertFreeCertificateContext(cert);
1466                         }
1467                 CertCloseStore(hstore, 0);
1468                 break;
1469
1470                 case CAPI_LU_CONTNAME:
1471                 key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
1472                                                         ctx->keytype);
1473                 break;
1474                 }
1475
1476         return key;
1477         }
1478
1479 void capi_free_key(CAPI_KEY *key)
1480         {
1481         if (!key)
1482                 return;
1483         CryptDestroyKey(key->key);
1484         CryptReleaseContext(key->hprov, 0);
1485         if (key->pcert)
1486                 CertFreeCertificateContext(key->pcert);
1487         OPENSSL_free(key);
1488         }
1489
1490
1491 /* Initialize a CAPI_CTX structure */
1492
1493 static CAPI_CTX *capi_ctx_new()
1494         {
1495         CAPI_CTX *ctx;
1496         ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
1497         if (!ctx)
1498                 {
1499                 CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
1500                 return NULL;
1501                 }
1502         ctx->cspname = NULL;
1503         ctx->csptype = PROV_RSA_FULL;
1504         ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
1505         ctx->keytype = AT_KEYEXCHANGE;
1506         ctx->storename = NULL;
1507         ctx->ssl_client_store = NULL;
1508         ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
1509                                 CERT_STORE_READONLY_FLAG |
1510                                 CERT_SYSTEM_STORE_CURRENT_USER;
1511         ctx->lookup_method = CAPI_LU_SUBSTR;
1512         ctx->debug_level = 0;
1513         ctx->debug_file = NULL;
1514         ctx->client_cert_select = cert_select_simple;
1515         return ctx;
1516         }
1517
1518 static void capi_ctx_free(CAPI_CTX *ctx)
1519         {
1520         CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
1521         if (!ctx)
1522                 return;
1523         if (ctx->cspname)
1524                 OPENSSL_free(ctx->cspname);
1525         if (ctx->debug_file)
1526                 OPENSSL_free(ctx->debug_file);
1527         if (ctx->storename)
1528                 OPENSSL_free(ctx->storename);
1529         if (ctx->ssl_client_store)
1530                 OPENSSL_free(ctx->ssl_client_store);
1531         OPENSSL_free(ctx);
1532         }
1533
1534 static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
1535         {
1536         CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
1537         if (check)
1538                 {
1539                 HCRYPTPROV hprov;
1540                 if (!CryptAcquireContextA(&hprov, NULL, pname, type,
1541                                                 CRYPT_VERIFYCONTEXT))
1542                         {
1543                         CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
1544                         capi_addlasterror();
1545                         return 0;
1546                         }
1547                 CryptReleaseContext(hprov, 0);
1548                 }
1549         ctx->cspname = BUF_strdup(pname);
1550         ctx->csptype = type;
1551         return 1;
1552         }
1553
1554 static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
1555         {
1556         LPSTR pname;
1557         DWORD type;
1558         if (capi_get_provname(ctx, &pname, &type, idx) != 1)
1559                 return 0;
1560         return capi_ctx_set_provname(ctx, pname, type, 0);
1561         }
1562
1563 static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
1564         {
1565         int i;
1566         X509_NAME *nm;
1567         /* Special case: empty list: match anything */
1568         if (sk_X509_NAME_num(ca_dn) <= 0)
1569                 return 1;
1570         for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
1571                 {
1572                 nm = sk_X509_NAME_value(ca_dn, i);
1573                 if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
1574                                 return 1;
1575                 }
1576         return 0;
1577         }
1578
1579
1580
1581 static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
1582         STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
1583         STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
1584         {
1585         STACK_OF(X509) *certs = NULL;
1586         X509 *x;
1587         char *storename;
1588         const char *p;
1589         int i, client_cert_idx;
1590         HCERTSTORE hstore;
1591         PCCERT_CONTEXT cert = NULL, excert = NULL;
1592         CAPI_CTX *ctx;
1593         CAPI_KEY *key;
1594         ctx = ENGINE_get_ex_data(e, capi_idx);
1595
1596         *pcert = NULL;
1597         *pkey = NULL;
1598
1599         storename = ctx->ssl_client_store;
1600         if (!storename)
1601                 storename = "MY";
1602
1603         hstore = capi_open_store(ctx, storename);
1604         if (!hstore)
1605                 return 0;
1606         /* Enumerate all certificates collect any matches */
1607         for(i = 0;;i++)
1608                 {
1609                 cert = CertEnumCertificatesInStore(hstore, cert);
1610                 if (!cert)
1611                         break;
1612                 p = cert->pbCertEncoded;
1613                 x = d2i_X509(NULL, &p, cert->cbCertEncoded);
1614                 if (!x)
1615                         {
1616                         CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
1617                         continue;
1618                         }
1619                 if (cert_issuer_match(ca_dn, x)
1620                         && X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
1621                         {
1622                         key = capi_get_cert_key(ctx, cert);
1623                         if (!key)
1624                                 {
1625                                 X509_free(x);
1626                                 continue;
1627                                 }
1628                         /* Match found: attach extra data to it so
1629                          * we can retrieve the key later.
1630                          */
1631                         excert = CertDuplicateCertificateContext(cert);
1632                         key->pcert = excert;
1633                         X509_set_ex_data(x, cert_capi_idx, key);
1634
1635                         if (!certs)
1636                                 certs = sk_X509_new_null();
1637
1638                         sk_X509_push(certs, x);
1639                         }
1640                 else
1641                         X509_free(x);
1642
1643                 }
1644
1645         if (cert)
1646                 CertFreeCertificateContext(cert);
1647         if (hstore)
1648                 CertCloseStore(hstore, 0);
1649
1650         if (!certs)
1651                 return 0;
1652
1653
1654         /* Select the appropriate certificate */
1655
1656         client_cert_idx = ctx->client_cert_select(e, ssl, certs);
1657
1658         /* Set the selected certificate and free the rest */
1659
1660         for(i = 0; i < sk_X509_num(certs); i++)
1661                 {
1662                 x = sk_X509_value(certs, i);
1663                 if (i == client_cert_idx)
1664                         *pcert = x;
1665                 else
1666                         {
1667                         key = X509_get_ex_data(x, cert_capi_idx);
1668                         capi_free_key(key);
1669                         X509_free(x);
1670                         }
1671                 }
1672
1673         sk_X509_free(certs);
1674
1675         if (!*pcert)
1676                 return 0;
1677
1678         /* Setup key for selected certificate */
1679
1680         key = X509_get_ex_data(*pcert, cert_capi_idx);
1681         *pkey = capi_get_pkey(e, key);
1682         X509_set_ex_data(*pcert, cert_capi_idx, NULL);
1683
1684         return 1;
1685
1686         }
1687
1688
1689 /* Simple client cert selection function: always select first */
1690
1691 static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1692         {
1693         return 0;
1694         }
1695
1696 #ifdef OPENSSL_CAPIENG_DIALOG
1697
1698 /* More complex cert selection function, using standard function
1699  * CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
1700  */
1701
1702 /* Definitions which are in cryptuiapi.h but this is not present in older
1703  * versions of headers.
1704  */
1705
1706 #ifndef CRYPTUI_SELECT_LOCATION_COLUMN
1707 #define CRYPTUI_SELECT_LOCATION_COLUMN                   0x000000010
1708 #define CRYPTUI_SELECT_INTENDEDUSE_COLUMN                0x000000004
1709 #endif
1710
1711 #define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
1712 #define dlg_prompt L"Select a certificate to use for authentication"
1713 #define dlg_columns      CRYPTUI_SELECT_LOCATION_COLUMN \
1714                         |CRYPTUI_SELECT_INTENDEDUSE_COLUMN
1715
1716 static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
1717         {
1718         X509 *x;
1719         HCERTSTORE dstore;
1720         PCCERT_CONTEXT cert;
1721         CAPI_CTX *ctx;
1722         CAPI_KEY *key;
1723         HWND hwnd;
1724         int i, idx = -1;
1725         if (sk_X509_num(certs) == 1)
1726                 return 0;
1727         ctx = ENGINE_get_ex_data(e, capi_idx);
1728         /* Create an in memory store of certificates */
1729         dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
1730                                         CERT_STORE_CREATE_NEW_FLAG, NULL);
1731         if (!dstore)
1732                 {
1733                 CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
1734                 capi_addlasterror();
1735                 goto err;
1736                 }
1737         /* Add all certificates to store */
1738         for(i = 0; i < sk_X509_num(certs); i++)
1739                 {
1740                 x = sk_X509_value(certs, i);
1741                 key = X509_get_ex_data(x, cert_capi_idx);
1742
1743                 if (!CertAddCertificateContextToStore(dstore, key->pcert,
1744                                                 CERT_STORE_ADD_NEW, NULL))
1745                         {
1746                         CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
1747                         capi_addlasterror();
1748                         goto err;
1749                         }
1750
1751                 }
1752         hwnd = GetForegroundWindow();
1753         if (!hwnd)
1754                 hwnd = GetActiveWindow();
1755         if (!hwnd && ctx->getconswindow)
1756                 hwnd = ctx->getconswindow();
1757         /* Call dialog to select one */
1758         cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
1759                                                 dlg_columns, 0, NULL);
1760
1761         /* Find matching cert from list */
1762         if (cert)
1763                 {
1764                 for(i = 0; i < sk_X509_num(certs); i++)
1765                         {
1766                         x = sk_X509_value(certs, i);
1767                         key = X509_get_ex_data(x, cert_capi_idx);
1768                         if (CertCompareCertificate(
1769                                 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
1770                                         cert->pCertInfo,
1771                                         key->pcert->pCertInfo))
1772                                 {
1773                                 idx = i;
1774                                 break;
1775                                 }
1776                         }
1777                 }
1778
1779         err:
1780         if (dstore)
1781                 CertCloseStore(dstore, 0);
1782         return idx;
1783
1784         }
1785 #endif
1786
1787 #endif
1788 #else /* !WIN32 */
1789 #include <openssl/engine.h>
1790 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1791 OPENSSL_EXPORT
1792 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
1793 IMPLEMENT_DYNAMIC_CHECK_FN()
1794 #endif
1795 #endif