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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 ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
95 {
96 if ( PKCS7_type_is_data(p7))
97 return p7->d.data;
98 if ( PKCS7_type_is_other(p7) && p7->d.other
99 && (p7->d.other->type == V_ASN1_OCTET_STRING))
100 return p7->d.other->value.octet_string;
101 return NULL;
102 }
103
104BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
105 {
106 int i;
107 BIO *out=NULL,*btmp=NULL;
108 X509_ALGOR *xa;
109 const EVP_MD *evp_md;
110 const EVP_CIPHER *evp_cipher=NULL;
111 STACK_OF(X509_ALGOR) *md_sk=NULL;
112 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
113 X509_ALGOR *xalg=NULL;
114 PKCS7_RECIP_INFO *ri=NULL;
115 EVP_PKEY *pkey;
116
117 i=OBJ_obj2nid(p7->type);
118 p7->state=PKCS7_S_HEADER;
119
120 switch (i)
121 {
122 case NID_pkcs7_signed:
123 md_sk=p7->d.sign->md_algs;
124 break;
125 case NID_pkcs7_signedAndEnveloped:
126 rsk=p7->d.signed_and_enveloped->recipientinfo;
127 md_sk=p7->d.signed_and_enveloped->md_algs;
128 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
129 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
130 if (evp_cipher == NULL)
131 {
132 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
133 PKCS7_R_CIPHER_NOT_INITIALIZED);
134 goto err;
135 }
136 break;
137 case NID_pkcs7_enveloped:
138 rsk=p7->d.enveloped->recipientinfo;
139 xalg=p7->d.enveloped->enc_data->algorithm;
140 evp_cipher=p7->d.enveloped->enc_data->cipher;
141 if (evp_cipher == NULL)
142 {
143 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
144 PKCS7_R_CIPHER_NOT_INITIALIZED);
145 goto err;
146 }
147 break;
148 default:
149 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
150 goto err;
151 }
152
153 if (md_sk != NULL)
154 {
155 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
156 {
157 xa=sk_X509_ALGOR_value(md_sk,i);
158 if ((btmp=BIO_new(BIO_f_md())) == NULL)
159 {
160 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
161 goto err;
162 }
163
164 evp_md=EVP_get_digestbyobj(xa->algorithm);
165 if (evp_md == NULL)
166 {
167 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
168 goto err;
169 }
170
171 BIO_set_md(btmp,evp_md);
172 if (out == NULL)
173 out=btmp;
174 else
175 BIO_push(out,btmp);
176 btmp=NULL;
177 }
178 }
179
180 if (evp_cipher != NULL)
181 {
182 unsigned char key[EVP_MAX_KEY_LENGTH];
183 unsigned char iv[EVP_MAX_IV_LENGTH];
184 int keylen,ivlen;
185 int jj,max;
186 unsigned char *tmp;
187 EVP_CIPHER_CTX *ctx;
188
189 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
190 {
191 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
192 goto err;
193 }
194 BIO_get_cipher_ctx(btmp, &ctx);
195 keylen=EVP_CIPHER_key_length(evp_cipher);
196 ivlen=EVP_CIPHER_iv_length(evp_cipher);
197 if (RAND_bytes(key,keylen) <= 0)
198 goto err;
199 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
200 if (ivlen > 0) RAND_pseudo_bytes(iv,ivlen);
201 EVP_CipherInit_ex(ctx, evp_cipher, NULL, key, iv, 1);
202
203 if (ivlen > 0) {
204 if (xalg->parameter == NULL)
205 xalg->parameter=ASN1_TYPE_new();
206 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
207 goto err;
208 }
209
210 /* Lets do the pub key stuff :-) */
211 max=0;
212 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
213 {
214 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
215 if (ri->cert == NULL)
216 {
217 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
218 goto err;
219 }
220 pkey=X509_get_pubkey(ri->cert);
221 jj=EVP_PKEY_size(pkey);
222 EVP_PKEY_free(pkey);
223 if (max < jj) max=jj;
224 }
225 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
226 {
227 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
228 goto err;
229 }
230 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
231 {
232 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
233 pkey=X509_get_pubkey(ri->cert);
234 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
235 EVP_PKEY_free(pkey);
236 if (jj <= 0)
237 {
238 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
239 OPENSSL_free(tmp);
240 goto err;
241 }
242 M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
243 }
244 OPENSSL_free(tmp);
245 OPENSSL_cleanse(key, keylen);
246
247 if (out == NULL)
248 out=btmp;
249 else
250 BIO_push(out,btmp);
251 btmp=NULL;
252 }
253
254 if (bio == NULL)
255 {
256 if (PKCS7_is_detached(p7))
257 bio=BIO_new(BIO_s_null());
258 else
259 {
260 if (PKCS7_type_is_signed(p7))
261 {
262 ASN1_OCTET_STRING *os;
263 os = PKCS7_get_octet_string(
264 p7->d.sign->contents);
265 if (os && os->length > 0)
266 bio = BIO_new_mem_buf(os->data,
267 os->length);
268 }
269 if(bio == NULL)
270 {
271 bio=BIO_new(BIO_s_mem());
272 BIO_set_mem_eof_return(bio,0);
273 }
274 }
275 }
276 BIO_push(out,bio);
277 bio=NULL;
278 if (0)
279 {
280err:
281 if (out != NULL)
282 BIO_free_all(out);
283 if (btmp != NULL)
284 BIO_free_all(btmp);
285 out=NULL;
286 }
287 return(out);
288 }
289
290/* int */
291BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
292 {
293 int i,j;
294 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
295 unsigned char *tmp=NULL;
296 X509_ALGOR *xa;
297 ASN1_OCTET_STRING *data_body=NULL;
298 const EVP_MD *evp_md;
299 const EVP_CIPHER *evp_cipher=NULL;
300 EVP_CIPHER_CTX *evp_ctx=NULL;
301 X509_ALGOR *enc_alg=NULL;
302 STACK_OF(X509_ALGOR) *md_sk=NULL;
303 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
304 X509_ALGOR *xalg=NULL;
305 PKCS7_RECIP_INFO *ri=NULL;
306
307 i=OBJ_obj2nid(p7->type);
308 p7->state=PKCS7_S_HEADER;
309
310 switch (i)
311 {
312 case NID_pkcs7_signed:
313 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
314 md_sk=p7->d.sign->md_algs;
315 break;
316 case NID_pkcs7_signedAndEnveloped:
317 rsk=p7->d.signed_and_enveloped->recipientinfo;
318 md_sk=p7->d.signed_and_enveloped->md_algs;
319 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
320 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
321 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
322 if (evp_cipher == NULL)
323 {
324 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
325 goto err;
326 }
327 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
328 break;
329 case NID_pkcs7_enveloped:
330 rsk=p7->d.enveloped->recipientinfo;
331 enc_alg=p7->d.enveloped->enc_data->algorithm;
332 data_body=p7->d.enveloped->enc_data->enc_data;
333 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
334 if (evp_cipher == NULL)
335 {
336 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
337 goto err;
338 }
339 xalg=p7->d.enveloped->enc_data->algorithm;
340 break;
341 default:
342 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
343 goto err;
344 }
345
346 /* We will be checking the signature */
347 if (md_sk != NULL)
348 {
349 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
350 {
351 xa=sk_X509_ALGOR_value(md_sk,i);
352 if ((btmp=BIO_new(BIO_f_md())) == NULL)
353 {
354 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
355 goto err;
356 }
357
358 j=OBJ_obj2nid(xa->algorithm);
359 evp_md=EVP_get_digestbynid(j);
360 if (evp_md == NULL)
361 {
362 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
363 goto err;
364 }
365
366 BIO_set_md(btmp,evp_md);
367 if (out == NULL)
368 out=btmp;
369 else
370 BIO_push(out,btmp);
371 btmp=NULL;
372 }
373 }
374
375 if (evp_cipher != NULL)
376 {
377#if 0
378 unsigned char key[EVP_MAX_KEY_LENGTH];
379 unsigned char iv[EVP_MAX_IV_LENGTH];
380 unsigned char *p;
381 int keylen,ivlen;
382 int max;
383 X509_OBJECT ret;
384#endif
385 int jj;
386
387 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
388 {
389 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
390 goto err;
391 }
392
393 /* It was encrypted, we need to decrypt the secret key
394 * with the private key */
395
396 /* Find the recipientInfo which matches the passed certificate
397 * (if any)
398 */
399
400 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
401 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
402 if(!X509_NAME_cmp(ri->issuer_and_serial->issuer,
403 pcert->cert_info->issuer) &&
404 !M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
405 ri->issuer_and_serial->serial)) break;
406 ri=NULL;
407 }
408 if (ri == NULL) {
409 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
410 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
411 goto err;
412 }
413
414 jj=EVP_PKEY_size(pkey);
415 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
416 if (tmp == NULL)
417 {
418 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
419 goto err;
420 }
421
422 jj=EVP_PKEY_decrypt(tmp, M_ASN1_STRING_data(ri->enc_key),
423 M_ASN1_STRING_length(ri->enc_key), pkey);
424 if (jj <= 0)
425 {
426 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB);
427 goto err;
428 }
429
430 evp_ctx=NULL;
431 BIO_get_cipher_ctx(etmp,&evp_ctx);
432 EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0);
433 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
434 goto err;
435
436 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
437 /* Some S/MIME clients don't use the same key
438 * and effective key length. The key length is
439 * determined by the size of the decrypted RSA key.
440 */
441 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
442 {
443 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
444 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
445 goto err;
446 }
447 }
448 EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0);
449
450 OPENSSL_cleanse(tmp,jj);
451
452 if (out == NULL)
453 out=etmp;
454 else
455 BIO_push(out,etmp);
456 etmp=NULL;
457 }
458
459#if 1
460 if (PKCS7_is_detached(p7) || (in_bio != NULL))
461 {
462 bio=in_bio;
463 }
464 else
465 {
466#if 0
467 bio=BIO_new(BIO_s_mem());
468 /* We need to set this so that when we have read all
469 * the data, the encrypt BIO, if present, will read
470 * EOF and encode the last few bytes */
471 BIO_set_mem_eof_return(bio,0);
472
473 if (data_body->length > 0)
474 BIO_write(bio,(char *)data_body->data,data_body->length);
475#else
476 if (data_body->length > 0)
477 bio = BIO_new_mem_buf(data_body->data,data_body->length);
478 else {
479 bio=BIO_new(BIO_s_mem());
480 BIO_set_mem_eof_return(bio,0);
481 }
482#endif
483 }
484 BIO_push(out,bio);
485 bio=NULL;
486#endif
487 if (0)
488 {
489err:
490 if (out != NULL) BIO_free_all(out);
491 if (btmp != NULL) BIO_free_all(btmp);
492 if (etmp != NULL) BIO_free_all(etmp);
493 if (bio != NULL) BIO_free_all(bio);
494 out=NULL;
495 }
496 if (tmp != NULL)
497 OPENSSL_free(tmp);
498 return(out);
499 }
500
501int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
502 {
503 int ret=0;
504 int i,j;
505 BIO *btmp;
506 BUF_MEM *buf_mem=NULL;
507 BUF_MEM *buf=NULL;
508 PKCS7_SIGNER_INFO *si;
509 EVP_MD_CTX *mdc,ctx_tmp;
510 STACK_OF(X509_ATTRIBUTE) *sk;
511 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
512 ASN1_OCTET_STRING *os=NULL;
513
514 EVP_MD_CTX_init(&ctx_tmp);
515 i=OBJ_obj2nid(p7->type);
516 p7->state=PKCS7_S_HEADER;
517
518 switch (i)
519 {
520 case NID_pkcs7_signedAndEnveloped:
521 /* XXXXXXXXXXXXXXXX */
522 si_sk=p7->d.signed_and_enveloped->signer_info;
523 os=M_ASN1_OCTET_STRING_new();
524 p7->d.signed_and_enveloped->enc_data->enc_data=os;
525 break;
526 case NID_pkcs7_enveloped:
527 /* XXXXXXXXXXXXXXXX */
528 os=M_ASN1_OCTET_STRING_new();
529 p7->d.enveloped->enc_data->enc_data=os;
530 break;
531 case NID_pkcs7_signed:
532 si_sk=p7->d.sign->signer_info;
533 os=PKCS7_get_octet_string(p7->d.sign->contents);
534 /* If detached data then the content is excluded */
535 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
536 M_ASN1_OCTET_STRING_free(os);
537 p7->d.sign->contents->d.data = NULL;
538 }
539 break;
540 }
541
542 if (si_sk != NULL)
543 {
544 if ((buf=BUF_MEM_new()) == NULL)
545 {
546 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
547 goto err;
548 }
549 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
550 {
551 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
552 if (si->pkey == NULL) continue;
553
554 j=OBJ_obj2nid(si->digest_alg->algorithm);
555
556 btmp=bio;
557 for (;;)
558 {
559 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
560 == NULL)
561 {
562 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
563 goto err;
564 }
565 BIO_get_md_ctx(btmp,&mdc);
566 if (mdc == NULL)
567 {
568 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_INTERNAL_ERROR);
569 goto err;
570 }
571 if (EVP_MD_CTX_type(mdc) == j)
572 break;
573 else
574 btmp=BIO_next(btmp);
575 }
576
577 /* We now have the EVP_MD_CTX, lets do the
578 * signing. */
579 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
580 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
581 {
582 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
583 goto err;
584 }
585
586 sk=si->auth_attr;
587
588 /* If there are attributes, we add the digest
589 * attribute and only sign the attributes */
590 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
591 {
592 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
593 unsigned int md_len, alen;
594 ASN1_OCTET_STRING *digest;
595 ASN1_UTCTIME *sign_time;
596 const EVP_MD *md_tmp;
597
598 /* Add signing time if not already present */
599 if (!PKCS7_get_signed_attribute(si,
600 NID_pkcs9_signingTime))
601 {
602 sign_time=X509_gmtime_adj(NULL,0);
603 PKCS7_add_signed_attribute(si,
604 NID_pkcs9_signingTime,
605 V_ASN1_UTCTIME,sign_time);
606 }
607
608 /* Add digest */
609 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
610 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
611 digest=M_ASN1_OCTET_STRING_new();
612 M_ASN1_OCTET_STRING_set(digest,md_data,md_len);
613 PKCS7_add_signed_attribute(si,
614 NID_pkcs9_messageDigest,
615 V_ASN1_OCTET_STRING,digest);
616
617 /* Now sign the attributes */
618 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
619 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
620 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
621 if(!abuf) goto err;
622 EVP_SignUpdate(&ctx_tmp,abuf,alen);
623 OPENSSL_free(abuf);
624 }
625
626#ifndef OPENSSL_NO_DSA
627 if (si->pkey->type == EVP_PKEY_DSA)
628 ctx_tmp.digest=EVP_dss1();
629#endif
630
631 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
632 (unsigned int *)&buf->length,si->pkey))
633 {
634 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
635 goto err;
636 }
637 if (!ASN1_STRING_set(si->enc_digest,
638 (unsigned char *)buf->data,buf->length))
639 {
640 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
641 goto err;
642 }
643 }
644 }
645
646 if (!PKCS7_is_detached(p7))
647 {
648 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
649 if (btmp == NULL)
650 {
651 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
652 goto err;
653 }
654 BIO_get_mem_ptr(btmp,&buf_mem);
655 /* Mark the BIO read only then we can use its copy of the data
656 * instead of making an extra copy.
657 */
658 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
659 BIO_set_mem_eof_return(btmp, 0);
660 os->data = (unsigned char *)buf_mem->data;
661 os->length = buf_mem->length;
662#if 0
663 M_ASN1_OCTET_STRING_set(os,
664 (unsigned char *)buf_mem->data,buf_mem->length);
665#endif
666 }
667 ret=1;
668err:
669 EVP_MD_CTX_cleanup(&ctx_tmp);
670 if (buf != NULL) BUF_MEM_free(buf);
671 return(ret);
672 }
673
674int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
675 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
676 {
677 PKCS7_ISSUER_AND_SERIAL *ias;
678 int ret=0,i;
679 STACK_OF(X509) *cert;
680 X509 *x509;
681
682 if (PKCS7_type_is_signed(p7))
683 {
684 cert=p7->d.sign->cert;
685 }
686 else if (PKCS7_type_is_signedAndEnveloped(p7))
687 {
688 cert=p7->d.signed_and_enveloped->cert;
689 }
690 else
691 {
692 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
693 goto err;
694 }
695 /* XXXXXXXXXXXXXXXXXXXXXXX */
696 ias=si->issuer_and_serial;
697
698 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
699
700 /* were we able to find the cert in passed to us */
701 if (x509 == NULL)
702 {
703 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
704 goto err;
705 }
706
707 /* Lets verify */
708 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
709 {
710 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
711 goto err;
712 }
713 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
714 i=X509_verify_cert(ctx);
715 if (i <= 0)
716 {
717 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
718 X509_STORE_CTX_cleanup(ctx);
719 goto err;
720 }
721 X509_STORE_CTX_cleanup(ctx);
722
723 return PKCS7_signatureVerify(bio, p7, si, x509);
724 err:
725 return ret;
726 }
727
728int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
729 X509 *x509)
730 {
731 ASN1_OCTET_STRING *os;
732 EVP_MD_CTX mdc_tmp,*mdc;
733 int ret=0,i;
734 int md_type;
735 STACK_OF(X509_ATTRIBUTE) *sk;
736 BIO *btmp;
737 EVP_PKEY *pkey;
738
739 EVP_MD_CTX_init(&mdc_tmp);
740
741 if (!PKCS7_type_is_signed(p7) &&
742 !PKCS7_type_is_signedAndEnveloped(p7)) {
743 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
744 PKCS7_R_WRONG_PKCS7_TYPE);
745 goto err;
746 }
747
748 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
749
750 btmp=bio;
751 for (;;)
752 {
753 if ((btmp == NULL) ||
754 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
755 {
756 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
757 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
758 goto err;
759 }
760 BIO_get_md_ctx(btmp,&mdc);
761 if (mdc == NULL)
762 {
763 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
764 ERR_R_INTERNAL_ERROR);
765 goto err;
766 }
767 if (EVP_MD_CTX_type(mdc) == md_type)
768 break;
769 /* Workaround for some broken clients that put the signature
770 * OID instead of the digest OID in digest_alg->algorithm
771 */
772 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
773 break;
774 btmp=BIO_next(btmp);
775 }
776
777 /* mdc is the digest ctx that we want, unless there are attributes,
778 * in which case the digest is the signed attributes */
779 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
780
781 sk=si->auth_attr;
782 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
783 {
784 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
785 unsigned int md_len, alen;
786 ASN1_OCTET_STRING *message_digest;
787
788 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
789 message_digest=PKCS7_digest_from_attributes(sk);
790 if (!message_digest)
791 {
792 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
793 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
794 goto err;
795 }
796 if ((message_digest->length != (int)md_len) ||
797 (memcmp(message_digest->data,md_dat,md_len)))
798 {
799#if 0
800{
801int ii;
802for (ii=0; ii<message_digest->length; ii++)
803 printf("%02X",message_digest->data[ii]); printf(" sent\n");
804for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
805}
806#endif
807 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
808 PKCS7_R_DIGEST_FAILURE);
809 ret= -1;
810 goto err;
811 }
812
813 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
814
815 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
816 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
817 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
818
819 OPENSSL_free(abuf);
820 }
821
822 os=si->enc_digest;
823 pkey = X509_get_pubkey(x509);
824 if (!pkey)
825 {
826 ret = -1;
827 goto err;
828 }
829#ifndef OPENSSL_NO_DSA
830 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
831#endif
832
833 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
834 EVP_PKEY_free(pkey);
835 if (i <= 0)
836 {
837 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
838 PKCS7_R_SIGNATURE_FAILURE);
839 ret= -1;
840 goto err;
841 }
842 else
843 ret=1;
844err:
845 EVP_MD_CTX_cleanup(&mdc_tmp);
846 return(ret);
847 }
848
849PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
850 {
851 STACK_OF(PKCS7_RECIP_INFO) *rsk;
852 PKCS7_RECIP_INFO *ri;
853 int i;
854
855 i=OBJ_obj2nid(p7->type);
856 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
857 rsk=p7->d.signed_and_enveloped->recipientinfo;
858 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
859 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
860 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
861 return(ri->issuer_and_serial);
862 }
863
864ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
865 {
866 return(get_attribute(si->auth_attr,nid));
867 }
868
869ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
870 {
871 return(get_attribute(si->unauth_attr,nid));
872 }
873
874static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
875 {
876 int i;
877 X509_ATTRIBUTE *xa;
878 ASN1_OBJECT *o;
879
880 o=OBJ_nid2obj(nid);
881 if (!o || !sk) return(NULL);
882 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
883 {
884 xa=sk_X509_ATTRIBUTE_value(sk,i);
885 if (OBJ_cmp(xa->object,o) == 0)
886 {
887 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
888 return(sk_ASN1_TYPE_value(xa->value.set,0));
889 else
890 return(NULL);
891 }
892 }
893 return(NULL);
894 }
895
896ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
897{
898 ASN1_TYPE *astype;
899 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
900 return astype->value.octet_string;
901}
902
903int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
904 STACK_OF(X509_ATTRIBUTE) *sk)
905 {
906 int i;
907
908 if (p7si->auth_attr != NULL)
909 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
910 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
911 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
912 {
913 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
914 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
915 == NULL)
916 return(0);
917 }
918 return(1);
919 }
920
921int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
922 {
923 int i;
924
925 if (p7si->unauth_attr != NULL)
926 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
927 X509_ATTRIBUTE_free);
928 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
929 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
930 {
931 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
932 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
933 == NULL)
934 return(0);
935 }
936 return(1);
937 }
938
939int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
940 void *value)
941 {
942 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
943 }
944
945int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
946 void *value)
947 {
948 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
949 }
950
951static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
952 void *value)
953 {
954 X509_ATTRIBUTE *attr=NULL;
955
956 if (*sk == NULL)
957 {
958 *sk = sk_X509_ATTRIBUTE_new_null();
959new_attrib:
960 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
961 sk_X509_ATTRIBUTE_push(*sk,attr);
962 }
963 else
964 {
965 int i;
966
967 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
968 {
969 attr=sk_X509_ATTRIBUTE_value(*sk,i);
970 if (OBJ_obj2nid(attr->object) == nid)
971 {
972 X509_ATTRIBUTE_free(attr);
973 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
974 sk_X509_ATTRIBUTE_set(*sk,i,attr);
975 goto end;
976 }
977 }
978 goto new_attrib;
979 }
980end:
981 return(1);
982 }
983
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-13 17:22:20 +0000