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diff --git a/src/lib/libcrypto/pkcs7/pk7_doit.c b/src/lib/libcrypto/pkcs7/pk7_doit.c
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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
66static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
67 void *value);
68static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
69
70static int PKCS7_type_is_other(PKCS7* p7)
71 {
72 int isOther=1;
73
74 int nid=OBJ_obj2nid(p7->type);
75
76 switch( nid )
77 {
78 case NID_pkcs7_data:
79 case NID_pkcs7_signed:
80 case NID_pkcs7_enveloped:
81 case NID_pkcs7_signedAndEnveloped:
82 case NID_pkcs7_digest:
83 case NID_pkcs7_encrypted:
84 isOther=0;
85 break;
86 default:
87 isOther=1;
88 }
89
90 return isOther;
91
92 }
93
94static int PKCS7_type_is_octet_string(PKCS7* p7)
95 {
96 if ( 0==PKCS7_type_is_other(p7) )
97 return 0;
98
99 return (V_ASN1_OCTET_STRING==p7->d.other->type) ? 1 : 0;
100 }
101
102BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
103 {
104 int i,j;
105 BIO *out=NULL,*btmp=NULL;
106 X509_ALGOR *xa;
107 const EVP_MD *evp_md;
108 const EVP_CIPHER *evp_cipher=NULL;
109 STACK_OF(X509_ALGOR) *md_sk=NULL;
110 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
111 X509_ALGOR *xalg=NULL;
112 PKCS7_RECIP_INFO *ri=NULL;
113 EVP_PKEY *pkey;
114
115 i=OBJ_obj2nid(p7->type);
116 p7->state=PKCS7_S_HEADER;
117
118 switch (i)
119 {
120 case NID_pkcs7_signed:
121 md_sk=p7->d.sign->md_algs;
122 break;
123 case NID_pkcs7_signedAndEnveloped:
124 rsk=p7->d.signed_and_enveloped->recipientinfo;
125 md_sk=p7->d.signed_and_enveloped->md_algs;
126 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
127 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
128 if (evp_cipher == NULL)
129 {
130 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
131 PKCS7_R_CIPHER_NOT_INITIALIZED);
132 goto err;
133 }
134 break;
135 case NID_pkcs7_enveloped:
136 rsk=p7->d.enveloped->recipientinfo;
137 xalg=p7->d.enveloped->enc_data->algorithm;
138 evp_cipher=p7->d.enveloped->enc_data->cipher;
139 if (evp_cipher == NULL)
140 {
141 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
142 PKCS7_R_CIPHER_NOT_INITIALIZED);
143 goto err;
144 }
145 break;
146 default:
147 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
148 goto err;
149 }
150
151 if (md_sk != NULL)
152 {
153 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
154 {
155 xa=sk_X509_ALGOR_value(md_sk,i);
156 if ((btmp=BIO_new(BIO_f_md())) == NULL)
157 {
158 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
159 goto err;
160 }
161
162 j=OBJ_obj2nid(xa->algorithm);
163 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
164 if (evp_md == NULL)
165 {
166 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
167 goto err;
168 }
169
170 BIO_set_md(btmp,evp_md);
171 if (out == NULL)
172 out=btmp;
173 else
174 BIO_push(out,btmp);
175 btmp=NULL;
176 }
177 }
178
179 if (evp_cipher != NULL)
180 {
181 unsigned char key[EVP_MAX_KEY_LENGTH];
182 unsigned char iv[EVP_MAX_IV_LENGTH];
183 int keylen,ivlen;
184 int jj,max;
185 unsigned char *tmp;
186 EVP_CIPHER_CTX *ctx;
187
188 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
189 {
190 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
191 goto err;
192 }
193 BIO_get_cipher_ctx(btmp, &ctx);
194 keylen=EVP_CIPHER_key_length(evp_cipher);
195 ivlen=EVP_CIPHER_iv_length(evp_cipher);
196 if (RAND_bytes(key,keylen) <= 0)
197 goto err;
198 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
199 if (ivlen > 0) RAND_pseudo_bytes(iv,ivlen);
200 EVP_CipherInit_ex(ctx, evp_cipher, NULL, key, iv, 1);
201
202 if (ivlen > 0) {
203 if (xalg->parameter == NULL)
204 xalg->parameter=ASN1_TYPE_new();
205 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
206 goto err;
207 }
208
209 /* Lets do the pub key stuff :-) */
210 max=0;
211 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
212 {
213 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
214 if (ri->cert == NULL)
215 {
216 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
217 goto err;
218 }
219 pkey=X509_get_pubkey(ri->cert);
220 jj=EVP_PKEY_size(pkey);
221 EVP_PKEY_free(pkey);
222 if (max < jj) max=jj;
223 }
224 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
225 {
226 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
227 goto err;
228 }
229 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
230 {
231 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
232 pkey=X509_get_pubkey(ri->cert);
233 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
234 EVP_PKEY_free(pkey);
235 if (jj <= 0)
236 {
237 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
238 OPENSSL_free(tmp);
239 goto err;
240 }
241 M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
242 }
243 OPENSSL_free(tmp);
244 OPENSSL_cleanse(key, keylen);
245
246 if (out == NULL)
247 out=btmp;
248 else
249 BIO_push(out,btmp);
250 btmp=NULL;
251 }
252
253 if (bio == NULL) {
254 if (PKCS7_is_detached(p7))
255 bio=BIO_new(BIO_s_null());
256 else {
257 if (PKCS7_type_is_signed(p7) ) {
258 if ( PKCS7_type_is_data(p7->d.sign->contents)) {
259 ASN1_OCTET_STRING *os;
260 os=p7->d.sign->contents->d.data;
261 if (os->length > 0)
262 bio = BIO_new_mem_buf(os->data, os->length);
263 }
264 else if ( PKCS7_type_is_octet_string(p7->d.sign->contents) ) {
265 ASN1_OCTET_STRING *os;
266 os=p7->d.sign->contents->d.other->value.octet_string;
267 if (os->length > 0)
268 bio = BIO_new_mem_buf(os->data, os->length);
269 }
270 }
271 if(bio == NULL) {
272 bio=BIO_new(BIO_s_mem());
273 BIO_set_mem_eof_return(bio,0);
274 }
275 }
276 }
277 BIO_push(out,bio);
278 bio=NULL;
279 if (0)
280 {
281err:
282 if (out != NULL)
283 BIO_free_all(out);
284 if (btmp != NULL)
285 BIO_free_all(btmp);
286 out=NULL;
287 }
288 return(out);
289 }
290
291/* int */
292BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
293 {
294 int i,j;
295 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
296 unsigned char *tmp=NULL;
297 X509_ALGOR *xa;
298 ASN1_OCTET_STRING *data_body=NULL;
299 const EVP_MD *evp_md;
300 const EVP_CIPHER *evp_cipher=NULL;
301 EVP_CIPHER_CTX *evp_ctx=NULL;
302 X509_ALGOR *enc_alg=NULL;
303 STACK_OF(X509_ALGOR) *md_sk=NULL;
304 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
305 X509_ALGOR *xalg=NULL;
306 PKCS7_RECIP_INFO *ri=NULL;
307
308 i=OBJ_obj2nid(p7->type);
309 p7->state=PKCS7_S_HEADER;
310
311 switch (i)
312 {
313 case NID_pkcs7_signed:
314 data_body=p7->d.sign->contents->d.data;
315 md_sk=p7->d.sign->md_algs;
316 break;
317 case NID_pkcs7_signedAndEnveloped:
318 rsk=p7->d.signed_and_enveloped->recipientinfo;
319 md_sk=p7->d.signed_and_enveloped->md_algs;
320 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
321 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
322 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
323 if (evp_cipher == NULL)
324 {
325 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
326 goto err;
327 }
328 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
329 break;
330 case NID_pkcs7_enveloped:
331 rsk=p7->d.enveloped->recipientinfo;
332 enc_alg=p7->d.enveloped->enc_data->algorithm;
333 data_body=p7->d.enveloped->enc_data->enc_data;
334 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
335 if (evp_cipher == NULL)
336 {
337 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
338 goto err;
339 }
340 xalg=p7->d.enveloped->enc_data->algorithm;
341 break;
342 default:
343 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
344 goto err;
345 }
346
347 /* We will be checking the signature */
348 if (md_sk != NULL)
349 {
350 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
351 {
352 xa=sk_X509_ALGOR_value(md_sk,i);
353 if ((btmp=BIO_new(BIO_f_md())) == NULL)
354 {
355 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
356 goto err;
357 }
358
359 j=OBJ_obj2nid(xa->algorithm);
360 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
361 if (evp_md == NULL)
362 {
363 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
364 goto err;
365 }
366
367 BIO_set_md(btmp,evp_md);
368 if (out == NULL)
369 out=btmp;
370 else
371 BIO_push(out,btmp);
372 btmp=NULL;
373 }
374 }
375
376 if (evp_cipher != NULL)
377 {
378#if 0
379 unsigned char key[EVP_MAX_KEY_LENGTH];
380 unsigned char iv[EVP_MAX_IV_LENGTH];
381 unsigned char *p;
382 int keylen,ivlen;
383 int max;
384 X509_OBJECT ret;
385#endif
386 int jj;
387
388 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
389 {
390 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
391 goto err;
392 }
393
394 /* It was encrypted, we need to decrypt the secret key
395 * with the private key */
396
397 /* Find the recipientInfo which matches the passed certificate
398 * (if any)
399 */
400
401 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
402 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
403 if(!X509_NAME_cmp(ri->issuer_and_serial->issuer,
404 pcert->cert_info->issuer) &&
405 !M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
406 ri->issuer_and_serial->serial)) break;
407 ri=NULL;
408 }
409 if (ri == NULL) {
410 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
411 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
412 goto err;
413 }
414
415 jj=EVP_PKEY_size(pkey);
416 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
417 if (tmp == NULL)
418 {
419 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
420 goto err;
421 }
422
423 jj=EVP_PKEY_decrypt(tmp, M_ASN1_STRING_data(ri->enc_key),
424 M_ASN1_STRING_length(ri->enc_key), pkey);
425 if (jj <= 0)
426 {
427 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB);
428 goto err;
429 }
430
431 evp_ctx=NULL;
432 BIO_get_cipher_ctx(etmp,&evp_ctx);
433 EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0);
434 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
435 goto err;
436
437 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
438 /* Some S/MIME clients don't use the same key
439 * and effective key length. The key length is
440 * determined by the size of the decrypted RSA key.
441 */
442 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
443 {
444 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
445 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
446 goto err;
447 }
448 }
449 EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0);
450
451 OPENSSL_cleanse(tmp,jj);
452
453 if (out == NULL)
454 out=etmp;
455 else
456 BIO_push(out,etmp);
457 etmp=NULL;
458 }
459
460#if 1
461 if (PKCS7_is_detached(p7) || (in_bio != NULL))
462 {
463 bio=in_bio;
464 }
465 else
466 {
467#if 0
468 bio=BIO_new(BIO_s_mem());
469 /* We need to set this so that when we have read all
470 * the data, the encrypt BIO, if present, will read
471 * EOF and encode the last few bytes */
472 BIO_set_mem_eof_return(bio,0);
473
474 if (data_body->length > 0)
475 BIO_write(bio,(char *)data_body->data,data_body->length);
476#else
477 if (data_body->length > 0)
478 bio = BIO_new_mem_buf(data_body->data,data_body->length);
479 else {
480 bio=BIO_new(BIO_s_mem());
481 BIO_set_mem_eof_return(bio,0);
482 }
483#endif
484 }
485 BIO_push(out,bio);
486 bio=NULL;
487#endif
488 if (0)
489 {
490err:
491 if (out != NULL) BIO_free_all(out);
492 if (btmp != NULL) BIO_free_all(btmp);
493 if (etmp != NULL) BIO_free_all(etmp);
494 if (bio != NULL) BIO_free_all(bio);
495 out=NULL;
496 }
497 if (tmp != NULL)
498 OPENSSL_free(tmp);
499 return(out);
500 }
501
502int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
503 {
504 int ret=0;
505 int i,j;
506 BIO *btmp;
507 BUF_MEM *buf_mem=NULL;
508 BUF_MEM *buf=NULL;
509 PKCS7_SIGNER_INFO *si;
510 EVP_MD_CTX *mdc,ctx_tmp;
511 STACK_OF(X509_ATTRIBUTE) *sk;
512 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
513 ASN1_OCTET_STRING *os=NULL;
514
515 EVP_MD_CTX_init(&ctx_tmp);
516 i=OBJ_obj2nid(p7->type);
517 p7->state=PKCS7_S_HEADER;
518
519 switch (i)
520 {
521 case NID_pkcs7_signedAndEnveloped:
522 /* XXXXXXXXXXXXXXXX */
523 si_sk=p7->d.signed_and_enveloped->signer_info;
524 os=M_ASN1_OCTET_STRING_new();
525 p7->d.signed_and_enveloped->enc_data->enc_data=os;
526 break;
527 case NID_pkcs7_enveloped:
528 /* XXXXXXXXXXXXXXXX */
529 os=M_ASN1_OCTET_STRING_new();
530 p7->d.enveloped->enc_data->enc_data=os;
531 break;
532 case NID_pkcs7_signed:
533 si_sk=p7->d.sign->signer_info;
534 os=p7->d.sign->contents->d.data;
535 /* If detached data then the content is excluded */
536 if(p7->detached) {
537 M_ASN1_OCTET_STRING_free(os);
538 p7->d.sign->contents->d.data = NULL;
539 }
540 break;
541 }
542
543 if (si_sk != NULL)
544 {
545 if ((buf=BUF_MEM_new()) == NULL)
546 {
547 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
548 goto err;
549 }
550 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
551 {
552 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
553 if (si->pkey == NULL) continue;
554
555 j=OBJ_obj2nid(si->digest_alg->algorithm);
556
557 btmp=bio;
558 for (;;)
559 {
560 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
561 == NULL)
562 {
563 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
564 goto err;
565 }
566 BIO_get_md_ctx(btmp,&mdc);
567 if (mdc == NULL)
568 {
569 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_INTERNAL_ERROR);
570 goto err;
571 }
572 if (EVP_MD_CTX_type(mdc) == j)
573 break;
574 else
575 btmp=BIO_next(btmp);
576 }
577
578 /* We now have the EVP_MD_CTX, lets do the
579 * signing. */
580 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
581 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
582 {
583 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
584 goto err;
585 }
586
587 sk=si->auth_attr;
588
589 /* If there are attributes, we add the digest
590 * attribute and only sign the attributes */
591 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
592 {
593 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
594 unsigned int md_len, alen;
595 ASN1_OCTET_STRING *digest;
596 ASN1_UTCTIME *sign_time;
597 const EVP_MD *md_tmp;
598
599 /* Add signing time if not already present */
600 if (!PKCS7_get_signed_attribute(si,
601 NID_pkcs9_signingTime))
602 {
603 sign_time=X509_gmtime_adj(NULL,0);
604 PKCS7_add_signed_attribute(si,
605 NID_pkcs9_signingTime,
606 V_ASN1_UTCTIME,sign_time);
607 }
608
609 /* Add digest */
610 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
611 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
612 digest=M_ASN1_OCTET_STRING_new();
613 M_ASN1_OCTET_STRING_set(digest,md_data,md_len);
614 PKCS7_add_signed_attribute(si,
615 NID_pkcs9_messageDigest,
616 V_ASN1_OCTET_STRING,digest);
617
618 /* Now sign the attributes */
619 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
620 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
621 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
622 if(!abuf) goto err;
623 EVP_SignUpdate(&ctx_tmp,abuf,alen);
624 OPENSSL_free(abuf);
625 }
626
627#ifndef OPENSSL_NO_DSA
628 if (si->pkey->type == EVP_PKEY_DSA)
629 ctx_tmp.digest=EVP_dss1();
630#endif
631
632 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
633 (unsigned int *)&buf->length,si->pkey))
634 {
635 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
636 goto err;
637 }
638 if (!ASN1_STRING_set(si->enc_digest,
639 (unsigned char *)buf->data,buf->length))
640 {
641 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
642 goto err;
643 }
644 }
645 }
646
647 if (!PKCS7_is_detached(p7))
648 {
649 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
650 if (btmp == NULL)
651 {
652 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
653 goto err;
654 }
655 BIO_get_mem_ptr(btmp,&buf_mem);
656 /* Mark the BIO read only then we can use its copy of the data
657 * instead of making an extra copy.
658 */
659 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
660 BIO_set_mem_eof_return(btmp, 0);
661 os->data = (unsigned char *)buf_mem->data;
662 os->length = buf_mem->length;
663#if 0
664 M_ASN1_OCTET_STRING_set(os,
665 (unsigned char *)buf_mem->data,buf_mem->length);
666#endif
667 }
668 ret=1;
669err:
670 EVP_MD_CTX_cleanup(&ctx_tmp);
671 if (buf != NULL) BUF_MEM_free(buf);
672 return(ret);
673 }
674
675int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
676 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
677 {
678 PKCS7_ISSUER_AND_SERIAL *ias;
679 int ret=0,i;
680 STACK_OF(X509) *cert;
681 X509 *x509;
682
683 if (PKCS7_type_is_signed(p7))
684 {
685 cert=p7->d.sign->cert;
686 }
687 else if (PKCS7_type_is_signedAndEnveloped(p7))
688 {
689 cert=p7->d.signed_and_enveloped->cert;
690 }
691 else
692 {
693 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
694 goto err;
695 }
696 /* XXXXXXXXXXXXXXXXXXXXXXX */
697 ias=si->issuer_and_serial;
698
699 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
700
701 /* were we able to find the cert in passed to us */
702 if (x509 == NULL)
703 {
704 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
705 goto err;
706 }
707
708 /* Lets verify */
709 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
710 {
711 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
712 goto err;
713 }
714 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
715 i=X509_verify_cert(ctx);
716 if (i <= 0)
717 {
718 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
719 X509_STORE_CTX_cleanup(ctx);
720 goto err;
721 }
722 X509_STORE_CTX_cleanup(ctx);
723
724 return PKCS7_signatureVerify(bio, p7, si, x509);
725 err:
726 return ret;
727 }
728
729int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
730 X509 *x509)
731 {
732 ASN1_OCTET_STRING *os;
733 EVP_MD_CTX mdc_tmp,*mdc;
734 int ret=0,i;
735 int md_type;
736 STACK_OF(X509_ATTRIBUTE) *sk;
737 BIO *btmp;
738 EVP_PKEY *pkey;
739
740 EVP_MD_CTX_init(&mdc_tmp);
741
742 if (!PKCS7_type_is_signed(p7) &&
743 !PKCS7_type_is_signedAndEnveloped(p7)) {
744 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
745 PKCS7_R_WRONG_PKCS7_TYPE);
746 goto err;
747 }
748
749 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
750
751 btmp=bio;
752 for (;;)
753 {
754 if ((btmp == NULL) ||
755 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
756 {
757 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
758 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
759 goto err;
760 }
761 BIO_get_md_ctx(btmp,&mdc);
762 if (mdc == NULL)
763 {
764 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
765 ERR_R_INTERNAL_ERROR);
766 goto err;
767 }
768 if (EVP_MD_CTX_type(mdc) == md_type)
769 break;
770 btmp=BIO_next(btmp);
771 }
772
773 /* mdc is the digest ctx that we want, unless there are attributes,
774 * in which case the digest is the signed attributes */
775 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
776
777 sk=si->auth_attr;
778 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
779 {
780 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
781 unsigned int md_len, alen;
782 ASN1_OCTET_STRING *message_digest;
783
784 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
785 message_digest=PKCS7_digest_from_attributes(sk);
786 if (!message_digest)
787 {
788 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
789 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
790 goto err;
791 }
792 if ((message_digest->length != (int)md_len) ||
793 (memcmp(message_digest->data,md_dat,md_len)))
794 {
795#if 0
796{
797int ii;
798for (ii=0; ii<message_digest->length; ii++)
799 printf("%02X",message_digest->data[ii]); printf(" sent\n");
800for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
801}
802#endif
803 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
804 PKCS7_R_DIGEST_FAILURE);
805 ret= -1;
806 goto err;
807 }
808
809 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
810
811 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
812 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
813 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
814
815 OPENSSL_free(abuf);
816 }
817
818 os=si->enc_digest;
819 pkey = X509_get_pubkey(x509);
820 if (!pkey)
821 {
822 ret = -1;
823 goto err;
824 }
825#ifndef OPENSSL_NO_DSA
826 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
827#endif
828
829 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
830 EVP_PKEY_free(pkey);
831 if (i <= 0)
832 {
833 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
834 PKCS7_R_SIGNATURE_FAILURE);
835 ret= -1;
836 goto err;
837 }
838 else
839 ret=1;
840err:
841 EVP_MD_CTX_cleanup(&mdc_tmp);
842 return(ret);
843 }
844
845PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
846 {
847 STACK_OF(PKCS7_RECIP_INFO) *rsk;
848 PKCS7_RECIP_INFO *ri;
849 int i;
850
851 i=OBJ_obj2nid(p7->type);
852 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
853 rsk=p7->d.signed_and_enveloped->recipientinfo;
854 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
855 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
856 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
857 return(ri->issuer_and_serial);
858 }
859
860ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
861 {
862 return(get_attribute(si->auth_attr,nid));
863 }
864
865ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
866 {
867 return(get_attribute(si->unauth_attr,nid));
868 }
869
870static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
871 {
872 int i;
873 X509_ATTRIBUTE *xa;
874 ASN1_OBJECT *o;
875
876 o=OBJ_nid2obj(nid);
877 if (!o || !sk) return(NULL);
878 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
879 {
880 xa=sk_X509_ATTRIBUTE_value(sk,i);
881 if (OBJ_cmp(xa->object,o) == 0)
882 {
883 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
884 return(sk_ASN1_TYPE_value(xa->value.set,0));
885 else
886 return(NULL);
887 }
888 }
889 return(NULL);
890 }
891
892ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
893{
894 ASN1_TYPE *astype;
895 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
896 return astype->value.octet_string;
897}
898
899int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
900 STACK_OF(X509_ATTRIBUTE) *sk)
901 {
902 int i;
903
904 if (p7si->auth_attr != NULL)
905 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
906 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
907 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
908 {
909 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
910 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
911 == NULL)
912 return(0);
913 }
914 return(1);
915 }
916
917int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
918 {
919 int i;
920
921 if (p7si->unauth_attr != NULL)
922 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
923 X509_ATTRIBUTE_free);
924 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
925 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
926 {
927 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
928 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
929 == NULL)
930 return(0);
931 }
932 return(1);
933 }
934
935int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
936 void *value)
937 {
938 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
939 }
940
941int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
942 void *value)
943 {
944 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
945 }
946
947static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
948 void *value)
949 {
950 X509_ATTRIBUTE *attr=NULL;
951
952 if (*sk == NULL)
953 {
954 *sk = sk_X509_ATTRIBUTE_new_null();
955new_attrib:
956 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
957 sk_X509_ATTRIBUTE_push(*sk,attr);
958 }
959 else
960 {
961 int i;
962
963 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
964 {
965 attr=sk_X509_ATTRIBUTE_value(*sk,i);
966 if (OBJ_obj2nid(attr->object) == nid)
967 {
968 X509_ATTRIBUTE_free(attr);
969 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
970 sk_X509_ATTRIBUTE_set(*sk,i,attr);
971 goto end;
972 }
973 }
974 goto new_attrib;
975 }
976end:
977 return(1);
978 }
979
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-27 03:25:25 +0000