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Move openssl-0.9/ to openssl/.
[dragonfly.git] / crypto / openssl / crypto / pkcs7 / pk7_doit.c
bloba03d7ebedf190ffd4ee1c62461a8fd11e65fa5d2
1 /* crypto/pkcs7/pk7_doit.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65 #include <openssl/err.h>
66
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
68 void *value);
69 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
70
71 static int PKCS7_type_is_other(PKCS7* p7)
72 {
73 int isOther=1;
74
75 int nid=OBJ_obj2nid(p7->type);
76
77 switch( nid )
78 {
79 case NID_pkcs7_data:
80 case NID_pkcs7_signed:
81 case NID_pkcs7_enveloped:
82 case NID_pkcs7_signedAndEnveloped:
83 case NID_pkcs7_digest:
84 case NID_pkcs7_encrypted:
85 isOther=0;
86 break;
87 default:
88 isOther=1;
89 }
90
91 return isOther;
92
93 }
94
95 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
96 {
97 if ( PKCS7_type_is_data(p7))
98 return p7->d.data;
99 if ( PKCS7_type_is_other(p7) && p7->d.other
100 && (p7->d.other->type == V_ASN1_OCTET_STRING))
101 return p7->d.other->value.octet_string;
102 return NULL;
103 }
104
105 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
106 {
107 BIO *btmp;
108 const EVP_MD *md;
109 if ((btmp=BIO_new(BIO_f_md())) == NULL)
110 {
111 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
112 goto err;
113 }
114
115 md=EVP_get_digestbyobj(alg->algorithm);
116 if (md == NULL)
117 {
118 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
119 goto err;
120 }
121
122 BIO_set_md(btmp,md);
123 if (*pbio == NULL)
124 *pbio=btmp;
125 else if (!BIO_push(*pbio,btmp))
126 {
127 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
128 goto err;
129 }
130 btmp=NULL;
131
132 return 1;
133
134 err:
135 if (btmp)
136 BIO_free(btmp);
137 return 0;
138
139 }
140
141 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
142 {
143 int i;
144 BIO *out=NULL,*btmp=NULL;
145 X509_ALGOR *xa = NULL;
146 const EVP_CIPHER *evp_cipher=NULL;
147 STACK_OF(X509_ALGOR) *md_sk=NULL;
148 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
149 X509_ALGOR *xalg=NULL;
150 PKCS7_RECIP_INFO *ri=NULL;
151 EVP_PKEY *pkey;
152 ASN1_OCTET_STRING *os=NULL;
153
154 i=OBJ_obj2nid(p7->type);
155 p7->state=PKCS7_S_HEADER;
156
157 switch (i)
158 {
159 case NID_pkcs7_signed:
160 md_sk=p7->d.sign->md_algs;
161 os = PKCS7_get_octet_string(p7->d.sign->contents);
162 break;
163 case NID_pkcs7_signedAndEnveloped:
164 rsk=p7->d.signed_and_enveloped->recipientinfo;
165 md_sk=p7->d.signed_and_enveloped->md_algs;
166 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
167 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
168 if (evp_cipher == NULL)
169 {
170 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
171 PKCS7_R_CIPHER_NOT_INITIALIZED);
172 goto err;
173 }
174 break;
175 case NID_pkcs7_enveloped:
176 rsk=p7->d.enveloped->recipientinfo;
177 xalg=p7->d.enveloped->enc_data->algorithm;
178 evp_cipher=p7->d.enveloped->enc_data->cipher;
179 if (evp_cipher == NULL)
180 {
181 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
182 PKCS7_R_CIPHER_NOT_INITIALIZED);
183 goto err;
184 }
185 break;
186 case NID_pkcs7_digest:
187 xa = p7->d.digest->md;
188 os = PKCS7_get_octet_string(p7->d.digest->contents);
189 break;
190 default:
191 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
192 goto err;
193 }
194
195 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
196 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
197 goto err;
198
199 if (xa && !PKCS7_bio_add_digest(&out, xa))
200 goto err;
201
202 if (evp_cipher != NULL)
203 {
204 unsigned char key[EVP_MAX_KEY_LENGTH];
205 unsigned char iv[EVP_MAX_IV_LENGTH];
206 int keylen,ivlen;
207 int jj,max;
208 unsigned char *tmp;
209 EVP_CIPHER_CTX *ctx;
210
211 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
212 {
213 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
214 goto err;
215 }
216 BIO_get_cipher_ctx(btmp, &ctx);
217 keylen=EVP_CIPHER_key_length(evp_cipher);
218 ivlen=EVP_CIPHER_iv_length(evp_cipher);
219 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
220 if (ivlen > 0)
221 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
222 goto err;
223 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
224 goto err;
225 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
226 goto err;
227 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
228 goto err;
229
230 if (ivlen > 0) {
231 if (xalg->parameter == NULL) {
232 xalg->parameter = ASN1_TYPE_new();
233 if (xalg->parameter == NULL)
234 goto err;
235 }
236 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
237 goto err;
238 }
239
240 /* Lets do the pub key stuff :-) */
241 max=0;
242 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
243 {
244 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
245 if (ri->cert == NULL)
246 {
247 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
248 goto err;
249 }
250 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
251 goto err;
252 jj=EVP_PKEY_size(pkey);
253 EVP_PKEY_free(pkey);
254 if (max < jj) max=jj;
255 }
256 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
257 {
258 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
259 goto err;
260 }
261 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
262 {
263 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
264 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
265 goto err;
266 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
267 EVP_PKEY_free(pkey);
268 if (jj <= 0)
269 {
270 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
271 OPENSSL_free(tmp);
272 goto err;
273 }
274 if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))
275 {
276 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
277 ERR_R_MALLOC_FAILURE);
278 OPENSSL_free(tmp);
279 goto err;
280 }
281 }
282 OPENSSL_free(tmp);
283 OPENSSL_cleanse(key, keylen);
284
285 if (out == NULL)
286 out=btmp;
287 else
288 BIO_push(out,btmp);
289 btmp=NULL;
290 }
291
292 if (bio == NULL)
293 {
294 if (PKCS7_is_detached(p7))
295 bio=BIO_new(BIO_s_null());
296 else if (os && os->length > 0)
297 bio = BIO_new_mem_buf(os->data, os->length);
298 if(bio == NULL)
299 {
300 bio=BIO_new(BIO_s_mem());
301 if (bio == NULL)
302 goto err;
303 BIO_set_mem_eof_return(bio,0);
304 }
305 }
306 BIO_push(out,bio);
307 bio=NULL;
308 if (0)
309 {
310 err:
311 if (out != NULL)
312 BIO_free_all(out);
313 if (btmp != NULL)
314 BIO_free_all(btmp);
315 out=NULL;
316 }
317 return(out);
318 }
319
320 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
321 {
322 int ret;
323 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
324 pcert->cert_info->issuer);
325 if (ret)
326 return ret;
327 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
328 ri->issuer_and_serial->serial);
329 }
330
331 /* int */
332 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
333 {
334 int i,j;
335 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
336 unsigned char *tmp=NULL;
337 X509_ALGOR *xa;
338 ASN1_OCTET_STRING *data_body=NULL;
339 const EVP_MD *evp_md;
340 const EVP_CIPHER *evp_cipher=NULL;
341 EVP_CIPHER_CTX *evp_ctx=NULL;
342 X509_ALGOR *enc_alg=NULL;
343 STACK_OF(X509_ALGOR) *md_sk=NULL;
344 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
345 X509_ALGOR *xalg=NULL;
346 PKCS7_RECIP_INFO *ri=NULL;
347
348 i=OBJ_obj2nid(p7->type);
349 p7->state=PKCS7_S_HEADER;
350
351 switch (i)
352 {
353 case NID_pkcs7_signed:
354 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
355 md_sk=p7->d.sign->md_algs;
356 break;
357 case NID_pkcs7_signedAndEnveloped:
358 rsk=p7->d.signed_and_enveloped->recipientinfo;
359 md_sk=p7->d.signed_and_enveloped->md_algs;
360 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
361 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
362 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
363 if (evp_cipher == NULL)
364 {
365 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
366 goto err;
367 }
368 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
369 break;
370 case NID_pkcs7_enveloped:
371 rsk=p7->d.enveloped->recipientinfo;
372 enc_alg=p7->d.enveloped->enc_data->algorithm;
373 data_body=p7->d.enveloped->enc_data->enc_data;
374 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
375 if (evp_cipher == NULL)
376 {
377 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
378 goto err;
379 }
380 xalg=p7->d.enveloped->enc_data->algorithm;
381 break;
382 default:
383 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
384 goto err;
385 }
386
387 /* We will be checking the signature */
388 if (md_sk != NULL)
389 {
390 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
391 {
392 xa=sk_X509_ALGOR_value(md_sk,i);
393 if ((btmp=BIO_new(BIO_f_md())) == NULL)
394 {
395 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
396 goto err;
397 }
398
399 j=OBJ_obj2nid(xa->algorithm);
400 evp_md=EVP_get_digestbynid(j);
401 if (evp_md == NULL)
402 {
403 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
404 goto err;
405 }
406
407 BIO_set_md(btmp,evp_md);
408 if (out == NULL)
409 out=btmp;
410 else
411 BIO_push(out,btmp);
412 btmp=NULL;
413 }
414 }
415
416 if (evp_cipher != NULL)
417 {
418 #if 0
419 unsigned char key[EVP_MAX_KEY_LENGTH];
420 unsigned char iv[EVP_MAX_IV_LENGTH];
421 unsigned char *p;
422 int keylen,ivlen;
423 int max;
424 X509_OBJECT ret;
425 #endif
426 int jj;
427
428 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
429 {
430 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
431 goto err;
432 }
433
434 /* It was encrypted, we need to decrypt the secret key
435 * with the private key */
436
437 /* Find the recipientInfo which matches the passed certificate
438 * (if any)
439 */
440
441 if (pcert) {
442 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
443 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
444 if (!pkcs7_cmp_ri(ri, pcert))
445 break;
446 ri=NULL;
447 }
448 if (ri == NULL) {
449 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
450 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
451 goto err;
452 }
453 }
454
455 jj=EVP_PKEY_size(pkey);
456 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
457 if (tmp == NULL)
458 {
459 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
460 goto err;
461 }
462
463 /* If we haven't got a certificate try each ri in turn */
464
465 if (pcert == NULL)
466 {
467 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
468 {
469 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
470 jj=EVP_PKEY_decrypt(tmp,
471 M_ASN1_STRING_data(ri->enc_key),
472 M_ASN1_STRING_length(ri->enc_key),
473 pkey);
474 if (jj > 0)
475 break;
476 ERR_clear_error();
477 ri = NULL;
478 }
479 if (ri == NULL)
480 {
481 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
482 PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
483 goto err;
484 }
485 }
486 else
487 {
488 jj=EVP_PKEY_decrypt(tmp,
489 M_ASN1_STRING_data(ri->enc_key),
490 M_ASN1_STRING_length(ri->enc_key), pkey);
491 if (jj <= 0)
492 {
493 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
494 ERR_R_EVP_LIB);
495 goto err;
496 }
497 }
498
499 evp_ctx=NULL;
500 BIO_get_cipher_ctx(etmp,&evp_ctx);
501 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
502 goto err;
503 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
504 goto err;
505
506 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
507 /* Some S/MIME clients don't use the same key
508 * and effective key length. The key length is
509 * determined by the size of the decrypted RSA key.
510 */
511 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
512 {
513 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
514 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
515 goto err;
516 }
517 }
518 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
519 goto err;
520
521 OPENSSL_cleanse(tmp,jj);
522
523 if (out == NULL)
524 out=etmp;
525 else
526 BIO_push(out,etmp);
527 etmp=NULL;
528 }
529
530 #if 1
531 if (PKCS7_is_detached(p7) || (in_bio != NULL))
532 {
533 bio=in_bio;
534 }
535 else
536 {
537 #if 0
538 bio=BIO_new(BIO_s_mem());
539 /* We need to set this so that when we have read all
540 * the data, the encrypt BIO, if present, will read
541 * EOF and encode the last few bytes */
542 BIO_set_mem_eof_return(bio,0);
543
544 if (data_body->length > 0)
545 BIO_write(bio,(char *)data_body->data,data_body->length);
546 #else
547 if (data_body->length > 0)
548 bio = BIO_new_mem_buf(data_body->data,data_body->length);
549 else {
550 bio=BIO_new(BIO_s_mem());
551 BIO_set_mem_eof_return(bio,0);
552 }
553 if (bio == NULL)
554 goto err;
555 #endif
556 }
557 BIO_push(out,bio);
558 bio=NULL;
559 #endif
560 if (0)
561 {
562 err:
563 if (out != NULL) BIO_free_all(out);
564 if (btmp != NULL) BIO_free_all(btmp);
565 if (etmp != NULL) BIO_free_all(etmp);
566 if (bio != NULL) BIO_free_all(bio);
567 out=NULL;
568 }
569 if (tmp != NULL)
570 OPENSSL_free(tmp);
571 return(out);
572 }
573
574 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
575 {
576 for (;;)
577 {
578 bio=BIO_find_type(bio,BIO_TYPE_MD);
579 if (bio == NULL)
580 {
581 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
582 return NULL;
583 }
584 BIO_get_md_ctx(bio,pmd);
585 if (*pmd == NULL)
586 {
587 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
588 return NULL;
589 }
590 if (EVP_MD_CTX_type(*pmd) == nid)
591 return bio;
592 bio=BIO_next(bio);
593 }
594 return NULL;
595 }
596
597 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
598 {
599 int ret=0;
600 int i,j;
601 BIO *btmp;
602 BUF_MEM *buf_mem=NULL;
603 BUF_MEM *buf=NULL;
604 PKCS7_SIGNER_INFO *si;
605 EVP_MD_CTX *mdc,ctx_tmp;
606 STACK_OF(X509_ATTRIBUTE) *sk;
607 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
608 ASN1_OCTET_STRING *os=NULL;
609
610 EVP_MD_CTX_init(&ctx_tmp);
611 i=OBJ_obj2nid(p7->type);
612 p7->state=PKCS7_S_HEADER;
613
614 switch (i)
615 {
616 case NID_pkcs7_signedAndEnveloped:
617 /* XXXXXXXXXXXXXXXX */
618 si_sk=p7->d.signed_and_enveloped->signer_info;
619 if (!(os=M_ASN1_OCTET_STRING_new()))
620 {
621 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
622 goto err;
623 }
624 p7->d.signed_and_enveloped->enc_data->enc_data=os;
625 break;
626 case NID_pkcs7_enveloped:
627 /* XXXXXXXXXXXXXXXX */
628 if (!(os=M_ASN1_OCTET_STRING_new()))
629 {
630 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
631 goto err;
632 }
633 p7->d.enveloped->enc_data->enc_data=os;
634 break;
635 case NID_pkcs7_signed:
636 si_sk=p7->d.sign->signer_info;
637 os=PKCS7_get_octet_string(p7->d.sign->contents);
638 /* If detached data then the content is excluded */
639 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
640 M_ASN1_OCTET_STRING_free(os);
641 p7->d.sign->contents->d.data = NULL;
642 }
643 break;
644
645 case NID_pkcs7_digest:
646 os=PKCS7_get_octet_string(p7->d.digest->contents);
647 /* If detached data then the content is excluded */
648 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
649 {
650 M_ASN1_OCTET_STRING_free(os);
651 p7->d.digest->contents->d.data = NULL;
652 }
653 break;
654
655 }
656
657 if (si_sk != NULL)
658 {
659 if ((buf=BUF_MEM_new()) == NULL)
660 {
661 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
662 goto err;
663 }
664 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
665 {
666 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
667 if (si->pkey == NULL) continue;
668
669 j=OBJ_obj2nid(si->digest_alg->algorithm);
670
671 btmp=bio;
672
673 btmp = PKCS7_find_digest(&mdc, btmp, j);
674
675 if (btmp == NULL)
676 goto err;
677
678 /* We now have the EVP_MD_CTX, lets do the
679 * signing. */
680 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
681 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
682 {
683 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
684 goto err;
685 }
686
687 sk=si->auth_attr;
688
689 /* If there are attributes, we add the digest
690 * attribute and only sign the attributes */
691 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
692 {
693 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
694 unsigned int md_len, alen;
695 ASN1_OCTET_STRING *digest;
696 ASN1_UTCTIME *sign_time;
697 const EVP_MD *md_tmp;
698
699 /* Add signing time if not already present */
700 if (!PKCS7_get_signed_attribute(si,
701 NID_pkcs9_signingTime))
702 {
703 if (!(sign_time=X509_gmtime_adj(NULL,0)))
704 {
705 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
706 ERR_R_MALLOC_FAILURE);
707 goto err;
708 }
709 if (!PKCS7_add_signed_attribute(si,
710 NID_pkcs9_signingTime,
711 V_ASN1_UTCTIME,sign_time))
712 {
713 M_ASN1_UTCTIME_free(sign_time);
714 goto err;
715 }
716 }
717
718 /* Add digest */
719 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
720 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
721 if (!(digest=M_ASN1_OCTET_STRING_new()))
722 {
723 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
724 ERR_R_MALLOC_FAILURE);
725 goto err;
726 }
727 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
728 md_len))
729 {
730 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
731 ERR_R_MALLOC_FAILURE);
732 M_ASN1_OCTET_STRING_free(digest);
733 goto err;
734 }
735 if (!PKCS7_add_signed_attribute(si,
736 NID_pkcs9_messageDigest,
737 V_ASN1_OCTET_STRING,digest))
738 {
739 M_ASN1_OCTET_STRING_free(digest);
740 goto err;
741 }
742
743 /* Now sign the attributes */
744 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
745 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
746 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
747 if(!abuf) goto err;
748 EVP_SignUpdate(&ctx_tmp,abuf,alen);
749 OPENSSL_free(abuf);
750 }
751
752 #ifndef OPENSSL_NO_DSA
753 if (si->pkey->type == EVP_PKEY_DSA)
754 ctx_tmp.digest=EVP_dss1();
755 #endif
756 #ifndef OPENSSL_NO_ECDSA
757 if (si->pkey->type == EVP_PKEY_EC)
758 ctx_tmp.digest=EVP_ecdsa();
759 #endif
760
761 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
762 (unsigned int *)&buf->length,si->pkey))
763 {
764 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
765 goto err;
766 }
767 if (!ASN1_STRING_set(si->enc_digest,
768 (unsigned char *)buf->data,buf->length))
769 {
770 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
771 goto err;
772 }
773 }
774 }
775 else if (i == NID_pkcs7_digest)
776 {
777 unsigned char md_data[EVP_MAX_MD_SIZE];
778 unsigned int md_len;
779 if (!PKCS7_find_digest(&mdc, bio,
780 OBJ_obj2nid(p7->d.digest->md->algorithm)))
781 goto err;
782 EVP_DigestFinal_ex(mdc,md_data,&md_len);
783 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
784 }
785
786 if (!PKCS7_is_detached(p7))
787 {
788 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
789 if (btmp == NULL)
790 {
791 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
792 goto err;
793 }
794 BIO_get_mem_ptr(btmp,&buf_mem);
795 /* Mark the BIO read only then we can use its copy of the data
796 * instead of making an extra copy.
797 */
798 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
799 BIO_set_mem_eof_return(btmp, 0);
800 os->data = (unsigned char *)buf_mem->data;
801 os->length = buf_mem->length;
802 #if 0
803 M_ASN1_OCTET_STRING_set(os,
804 (unsigned char *)buf_mem->data,buf_mem->length);
805 #endif
806 }
807 ret=1;
808 err:
809 EVP_MD_CTX_cleanup(&ctx_tmp);
810 if (buf != NULL) BUF_MEM_free(buf);
811 return(ret);
812 }
813
814 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
815 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
816 {
817 PKCS7_ISSUER_AND_SERIAL *ias;
818 int ret=0,i;
819 STACK_OF(X509) *cert;
820 X509 *x509;
821
822 if (PKCS7_type_is_signed(p7))
823 {
824 cert=p7->d.sign->cert;
825 }
826 else if (PKCS7_type_is_signedAndEnveloped(p7))
827 {
828 cert=p7->d.signed_and_enveloped->cert;
829 }
830 else
831 {
832 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
833 goto err;
834 }
835 /* XXXXXXXXXXXXXXXXXXXXXXX */
836 ias=si->issuer_and_serial;
837
838 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
839
840 /* were we able to find the cert in passed to us */
841 if (x509 == NULL)
842 {
843 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
844 goto err;
845 }
846
847 /* Lets verify */
848 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
849 {
850 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
851 goto err;
852 }
853 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
854 i=X509_verify_cert(ctx);
855 if (i <= 0)
856 {
857 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
858 X509_STORE_CTX_cleanup(ctx);
859 goto err;
860 }
861 X509_STORE_CTX_cleanup(ctx);
862
863 return PKCS7_signatureVerify(bio, p7, si, x509);
864 err:
865 return ret;
866 }
867
868 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
869 X509 *x509)
870 {
871 ASN1_OCTET_STRING *os;
872 EVP_MD_CTX mdc_tmp,*mdc;
873 int ret=0,i;
874 int md_type;
875 STACK_OF(X509_ATTRIBUTE) *sk;
876 BIO *btmp;
877 EVP_PKEY *pkey;
878
879 EVP_MD_CTX_init(&mdc_tmp);
880
881 if (!PKCS7_type_is_signed(p7) &&
882 !PKCS7_type_is_signedAndEnveloped(p7)) {
883 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
884 PKCS7_R_WRONG_PKCS7_TYPE);
885 goto err;
886 }
887
888 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
889
890 btmp=bio;
891 for (;;)
892 {
893 if ((btmp == NULL) ||
894 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
895 {
896 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
897 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
898 goto err;
899 }
900 BIO_get_md_ctx(btmp,&mdc);
901 if (mdc == NULL)
902 {
903 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
904 ERR_R_INTERNAL_ERROR);
905 goto err;
906 }
907 if (EVP_MD_CTX_type(mdc) == md_type)
908 break;
909 /* Workaround for some broken clients that put the signature
910 * OID instead of the digest OID in digest_alg->algorithm
911 */
912 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
913 break;
914 btmp=BIO_next(btmp);
915 }
916
917 /* mdc is the digest ctx that we want, unless there are attributes,
918 * in which case the digest is the signed attributes */
919 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
920
921 sk=si->auth_attr;
922 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
923 {
924 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
925 unsigned int md_len, alen;
926 ASN1_OCTET_STRING *message_digest;
927
928 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
929 message_digest=PKCS7_digest_from_attributes(sk);
930 if (!message_digest)
931 {
932 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
933 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
934 goto err;
935 }
936 if ((message_digest->length != (int)md_len) ||
937 (memcmp(message_digest->data,md_dat,md_len)))
938 {
939 #if 0
940 {
941 int ii;
942 for (ii=0; ii<message_digest->length; ii++)
943 printf("%02X",message_digest->data[ii]); printf(" sent\n");
944 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
945 }
946 #endif
947 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
948 PKCS7_R_DIGEST_FAILURE);
949 ret= -1;
950 goto err;
951 }
952
953 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
954
955 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
956 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
957 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
958
959 OPENSSL_free(abuf);
960 }
961
962 os=si->enc_digest;
963 pkey = X509_get_pubkey(x509);
964 if (!pkey)
965 {
966 ret = -1;
967 goto err;
968 }
969 #ifndef OPENSSL_NO_DSA
970 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
971 #endif
972 #ifndef OPENSSL_NO_ECDSA
973 if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
974 #endif
975
976 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
977 EVP_PKEY_free(pkey);
978 if (i <= 0)
979 {
980 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
981 PKCS7_R_SIGNATURE_FAILURE);
982 ret= -1;
983 goto err;
984 }
985 else
986 ret=1;
987 err:
988 EVP_MD_CTX_cleanup(&mdc_tmp);
989 return(ret);
990 }
991
992 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
993 {
994 STACK_OF(PKCS7_RECIP_INFO) *rsk;
995 PKCS7_RECIP_INFO *ri;
996 int i;
997
998 i=OBJ_obj2nid(p7->type);
999 if (i != NID_pkcs7_signedAndEnveloped)
1000 return NULL;
1001 if (p7->d.signed_and_enveloped == NULL)
1002 return NULL;
1003 rsk=p7->d.signed_and_enveloped->recipientinfo;
1004 if (rsk == NULL)
1005 return NULL;
1006 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1007 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1008 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1009 return(ri->issuer_and_serial);
1010 }
1011
1012 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1013 {
1014 return(get_attribute(si->auth_attr,nid));
1015 }
1016
1017 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1018 {
1019 return(get_attribute(si->unauth_attr,nid));
1020 }
1021
1022 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1023 {
1024 int i;
1025 X509_ATTRIBUTE *xa;
1026 ASN1_OBJECT *o;
1027
1028 o=OBJ_nid2obj(nid);
1029 if (!o || !sk) return(NULL);
1030 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1031 {
1032 xa=sk_X509_ATTRIBUTE_value(sk,i);
1033 if (OBJ_cmp(xa->object,o) == 0)
1034 {
1035 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1036 return(sk_ASN1_TYPE_value(xa->value.set,0));
1037 else
1038 return(NULL);
1039 }
1040 }
1041 return(NULL);
1042 }
1043
1044 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1045 {
1046 ASN1_TYPE *astype;
1047 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1048 return astype->value.octet_string;
1049 }
1050
1051 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1052 STACK_OF(X509_ATTRIBUTE) *sk)
1053 {
1054 int i;
1055
1056 if (p7si->auth_attr != NULL)
1057 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1058 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1059 if (p7si->auth_attr == NULL)
1060 return 0;
1061 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1062 {
1063 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1064 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1065 == NULL)
1066 return(0);
1067 }
1068 return(1);
1069 }
1070
1071 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1072 {
1073 int i;
1074
1075 if (p7si->unauth_attr != NULL)
1076 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1077 X509_ATTRIBUTE_free);
1078 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1079 if (p7si->unauth_attr == NULL)
1080 return 0;
1081 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1082 {
1083 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1084 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1085 == NULL)
1086 return(0);
1087 }
1088 return(1);
1089 }
1090
1091 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1092 void *value)
1093 {
1094 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1095 }
1096
1097 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1098 void *value)
1099 {
1100 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1101 }
1102
1103 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1104 void *value)
1105 {
1106 X509_ATTRIBUTE *attr=NULL;
1107
1108 if (*sk == NULL)
1109 {
1110 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1111 return 0;
1112 new_attrib:
1113 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1114 return 0;
1115 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1116 {
1117 X509_ATTRIBUTE_free(attr);
1118 return 0;
1119 }
1120 }
1121 else
1122 {
1123 int i;
1124
1125 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1126 {
1127 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1128 if (OBJ_obj2nid(attr->object) == nid)
1129 {
1130 X509_ATTRIBUTE_free(attr);
1131 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1132 if (attr == NULL)
1133 return 0;
1134 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1135 {
1136 X509_ATTRIBUTE_free(attr);
1137 return 0;
1138 }
1139 goto end;
1140 }
1141 }
1142 goto new_attrib;
1143 }
1144 end:
1145 return(1);
1146 }
1147
DragonFly BSD