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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
70BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
71 {
72 int i,j;
73 BIO *out=NULL,*btmp=NULL;
74 X509_ALGOR *xa;
75 const EVP_MD *evp_md;
76 const EVP_CIPHER *evp_cipher=NULL;
77 STACK_OF(X509_ALGOR) *md_sk=NULL;
78 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
79 X509_ALGOR *xalg=NULL;
80 PKCS7_RECIP_INFO *ri=NULL;
81 EVP_PKEY *pkey;
82
83 i=OBJ_obj2nid(p7->type);
84 p7->state=PKCS7_S_HEADER;
85
86 switch (i)
87 {
88 case NID_pkcs7_signed:
89 md_sk=p7->d.sign->md_algs;
90 break;
91 case NID_pkcs7_signedAndEnveloped:
92 rsk=p7->d.signed_and_enveloped->recipientinfo;
93 md_sk=p7->d.signed_and_enveloped->md_algs;
94 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
95 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
96 if (evp_cipher == NULL)
97 {
98 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
99 PKCS7_R_CIPHER_NOT_INITIALIZED);
100 goto err;
101 }
102 break;
103 case NID_pkcs7_enveloped:
104 rsk=p7->d.enveloped->recipientinfo;
105 xalg=p7->d.enveloped->enc_data->algorithm;
106 evp_cipher=p7->d.enveloped->enc_data->cipher;
107 if (evp_cipher == NULL)
108 {
109 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
110 PKCS7_R_CIPHER_NOT_INITIALIZED);
111 goto err;
112 }
113 break;
114 default:
115 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
116 goto err;
117 }
118
119 if (md_sk != NULL)
120 {
121 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
122 {
123 xa=sk_X509_ALGOR_value(md_sk,i);
124 if ((btmp=BIO_new(BIO_f_md())) == NULL)
125 {
126 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
127 goto err;
128 }
129
130 j=OBJ_obj2nid(xa->algorithm);
131 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
132 if (evp_md == NULL)
133 {
134 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
135 goto err;
136 }
137
138 BIO_set_md(btmp,evp_md);
139 if (out == NULL)
140 out=btmp;
141 else
142 BIO_push(out,btmp);
143 btmp=NULL;
144 }
145 }
146
147 if (evp_cipher != NULL)
148 {
149 unsigned char key[EVP_MAX_KEY_LENGTH];
150 unsigned char iv[EVP_MAX_IV_LENGTH];
151 int keylen,ivlen;
152 int jj,max;
153 unsigned char *tmp;
154 EVP_CIPHER_CTX *ctx;
155
156 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
157 {
158 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
159 goto err;
160 }
161 BIO_get_cipher_ctx(btmp, &ctx);
162 keylen=EVP_CIPHER_key_length(evp_cipher);
163 ivlen=EVP_CIPHER_iv_length(evp_cipher);
164 if (RAND_bytes(key,keylen) <= 0)
165 goto err;
166 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
167 if (ivlen > 0) RAND_pseudo_bytes(iv,ivlen);
168 EVP_CipherInit(ctx, evp_cipher, key, iv, 1);
169
170 if (ivlen > 0) {
171 if (xalg->parameter == NULL)
172 xalg->parameter=ASN1_TYPE_new();
173 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
174 goto err;
175 }
176
177 /* Lets do the pub key stuff :-) */
178 max=0;
179 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
180 {
181 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
182 if (ri->cert == NULL)
183 {
184 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
185 goto err;
186 }
187 pkey=X509_get_pubkey(ri->cert);
188 jj=EVP_PKEY_size(pkey);
189 EVP_PKEY_free(pkey);
190 if (max < jj) max=jj;
191 }
192 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
193 {
194 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
195 goto err;
196 }
197 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
198 {
199 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
200 pkey=X509_get_pubkey(ri->cert);
201 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
202 EVP_PKEY_free(pkey);
203 if (jj <= 0)
204 {
205 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
206 Free(tmp);
207 goto err;
208 }
209 M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
210 }
211 Free(tmp);
212 memset(key, 0, keylen);
213
214 if (out == NULL)
215 out=btmp;
216 else
217 BIO_push(out,btmp);
218 btmp=NULL;
219 }
220
221 if (bio == NULL) {
222 if (p7->detached)
223 bio=BIO_new(BIO_s_null());
224 else {
225 if (PKCS7_type_is_signed(p7) &&
226 PKCS7_type_is_data(p7->d.sign->contents)) {
227 ASN1_OCTET_STRING *os;
228 os=p7->d.sign->contents->d.data;
229 if (os->length > 0) bio =
230 BIO_new_mem_buf(os->data, os->length);
231 }
232 if(bio == NULL) {
233 bio=BIO_new(BIO_s_mem());
234 BIO_set_mem_eof_return(bio,0);
235 }
236 }
237 }
238 BIO_push(out,bio);
239 bio=NULL;
240 if (0)
241 {
242err:
243 if (out != NULL)
244 BIO_free_all(out);
245 if (btmp != NULL)
246 BIO_free_all(btmp);
247 out=NULL;
248 }
249 return(out);
250 }
251
252/* int */
253BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
254 {
255 int i,j;
256 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
257 unsigned char *tmp=NULL;
258 X509_ALGOR *xa;
259 ASN1_OCTET_STRING *data_body=NULL;
260 const EVP_MD *evp_md;
261 const EVP_CIPHER *evp_cipher=NULL;
262 EVP_CIPHER_CTX *evp_ctx=NULL;
263 X509_ALGOR *enc_alg=NULL;
264 STACK_OF(X509_ALGOR) *md_sk=NULL;
265 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
266 X509_ALGOR *xalg=NULL;
267 PKCS7_RECIP_INFO *ri=NULL;
268#ifndef NO_RC2
269 char is_rc2 = 0;
270#endif
271/* EVP_PKEY *pkey; */
272#if 0
273 X509_STORE_CTX s_ctx;
274#endif
275
276 i=OBJ_obj2nid(p7->type);
277 p7->state=PKCS7_S_HEADER;
278
279 switch (i)
280 {
281 case NID_pkcs7_signed:
282 data_body=p7->d.sign->contents->d.data;
283 md_sk=p7->d.sign->md_algs;
284 break;
285 case NID_pkcs7_signedAndEnveloped:
286 rsk=p7->d.signed_and_enveloped->recipientinfo;
287 md_sk=p7->d.signed_and_enveloped->md_algs;
288 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
289 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
290 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
291 if (evp_cipher == NULL)
292 {
293 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
294 goto err;
295 }
296 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
297 break;
298 case NID_pkcs7_enveloped:
299 rsk=p7->d.enveloped->recipientinfo;
300 enc_alg=p7->d.enveloped->enc_data->algorithm;
301 data_body=p7->d.enveloped->enc_data->enc_data;
302 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
303 if (evp_cipher == NULL)
304 {
305 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
306 goto err;
307 }
308 xalg=p7->d.enveloped->enc_data->algorithm;
309 break;
310 default:
311 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
312 goto err;
313 }
314
315 if(EVP_CIPHER_nid(evp_cipher) == NID_rc2_cbc)
316 {
317#ifndef NO_RC2
318 is_rc2 = 1;
319#else
320 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
321 goto err;
322#endif
323 }
324
325 /* We will be checking the signature */
326 if (md_sk != NULL)
327 {
328 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
329 {
330 xa=sk_X509_ALGOR_value(md_sk,i);
331 if ((btmp=BIO_new(BIO_f_md())) == NULL)
332 {
333 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
334 goto err;
335 }
336
337 j=OBJ_obj2nid(xa->algorithm);
338 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
339 if (evp_md == NULL)
340 {
341 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
342 goto err;
343 }
344
345 BIO_set_md(btmp,evp_md);
346 if (out == NULL)
347 out=btmp;
348 else
349 BIO_push(out,btmp);
350 btmp=NULL;
351 }
352 }
353
354 if (evp_cipher != NULL)
355 {
356#if 0
357 unsigned char key[EVP_MAX_KEY_LENGTH];
358 unsigned char iv[EVP_MAX_IV_LENGTH];
359 unsigned char *p;
360 int keylen,ivlen;
361 int max;
362 X509_OBJECT ret;
363#endif
364 int jj;
365
366 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
367 {
368 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
369 goto err;
370 }
371
372 /* It was encrypted, we need to decrypt the secret key
373 * with the private key */
374
375 /* Find the recipientInfo which matches the passed certificate
376 * (if any)
377 */
378
379 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
380 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
381 if(!X509_NAME_cmp(ri->issuer_and_serial->issuer,
382 pcert->cert_info->issuer) &&
383 !M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
384 ri->issuer_and_serial->serial)) break;
385 ri=NULL;
386 }
387 if (ri == NULL) {
388 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
389 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
390 return(NULL);
391 }
392
393 jj=EVP_PKEY_size(pkey);
394 tmp=(unsigned char *)Malloc(jj+10);
395 if (tmp == NULL)
396 {
397 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
398 goto err;
399 }
400
401 jj=EVP_PKEY_decrypt(tmp, M_ASN1_STRING_data(ri->enc_key),
402 M_ASN1_STRING_length(ri->enc_key), pkey);
403 if (jj <= 0)
404 {
405 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB);
406 goto err;
407 }
408
409 evp_ctx=NULL;
410 BIO_get_cipher_ctx(etmp,&evp_ctx);
411 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
412 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
413 return(NULL);
414
415 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
416 /* HACK: some S/MIME clients don't use the same key
417 * and effective key length. The key length is
418 * determined by the size of the decrypted RSA key.
419 * So we hack things to manually set the RC2 key
420 * because we currently can't do this with the EVP
421 * interface.
422 */
423#ifndef NO_RC2
424 if(is_rc2) RC2_set_key(&(evp_ctx->c.rc2_ks),jj, tmp,
425 EVP_CIPHER_CTX_key_length(evp_ctx)*8);
426 else
427#endif
428 {
429 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
430 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
431 goto err;
432 }
433 } else EVP_CipherInit(evp_ctx,NULL,tmp,NULL,0);
434
435 memset(tmp,0,jj);
436
437 if (out == NULL)
438 out=etmp;
439 else
440 BIO_push(out,etmp);
441 etmp=NULL;
442 }
443
444#if 1
445 if (p7->detached || (in_bio != NULL))
446 {
447 bio=in_bio;
448 }
449 else
450 {
451#if 0
452 bio=BIO_new(BIO_s_mem());
453 /* We need to set this so that when we have read all
454 * the data, the encrypt BIO, if present, will read
455 * EOF and encode the last few bytes */
456 BIO_set_mem_eof_return(bio,0);
457
458 if (data_body->length > 0)
459 BIO_write(bio,(char *)data_body->data,data_body->length);
460#else
461 if (data_body->length > 0)
462 bio = BIO_new_mem_buf(data_body->data,data_body->length);
463 else {
464 bio=BIO_new(BIO_s_mem());
465 BIO_set_mem_eof_return(bio,0);
466 }
467#endif
468 }
469 BIO_push(out,bio);
470 bio=NULL;
471#endif
472 if (0)
473 {
474err:
475 if (out != NULL) BIO_free_all(out);
476 if (btmp != NULL) BIO_free_all(btmp);
477 if (etmp != NULL) BIO_free_all(etmp);
478 if (bio != NULL) BIO_free_all(bio);
479 out=NULL;
480 }
481 if (tmp != NULL)
482 Free(tmp);
483 return(out);
484 }
485
486int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
487 {
488 int ret=0;
489 int i,j;
490 BIO *btmp;
491 BUF_MEM *buf_mem=NULL;
492 BUF_MEM *buf=NULL;
493 PKCS7_SIGNER_INFO *si;
494 EVP_MD_CTX *mdc,ctx_tmp;
495 STACK_OF(X509_ATTRIBUTE) *sk;
496 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
497 unsigned char *p,*pp=NULL;
498 int x;
499 ASN1_OCTET_STRING *os=NULL;
500
501 i=OBJ_obj2nid(p7->type);
502 p7->state=PKCS7_S_HEADER;
503
504 switch (i)
505 {
506 case NID_pkcs7_signedAndEnveloped:
507 /* XXXXXXXXXXXXXXXX */
508 si_sk=p7->d.signed_and_enveloped->signer_info;
509 os=M_ASN1_OCTET_STRING_new();
510 p7->d.signed_and_enveloped->enc_data->enc_data=os;
511 break;
512 case NID_pkcs7_enveloped:
513 /* XXXXXXXXXXXXXXXX */
514 os=M_ASN1_OCTET_STRING_new();
515 p7->d.enveloped->enc_data->enc_data=os;
516 break;
517 case NID_pkcs7_signed:
518 si_sk=p7->d.sign->signer_info;
519 os=p7->d.sign->contents->d.data;
520 /* If detached data then the content is excluded */
521 if(p7->detached) {
522 M_ASN1_OCTET_STRING_free(os);
523 p7->d.sign->contents->d.data = NULL;
524 }
525 break;
526 }
527
528 if (si_sk != NULL)
529 {
530 if ((buf=BUF_MEM_new()) == NULL)
531 {
532 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
533 goto err;
534 }
535 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
536 {
537 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
538 if (si->pkey == NULL) continue;
539
540 j=OBJ_obj2nid(si->digest_alg->algorithm);
541
542 btmp=bio;
543 for (;;)
544 {
545 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
546 == NULL)
547 {
548 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
549 goto err;
550 }
551 BIO_get_md_ctx(btmp,&mdc);
552 if (mdc == NULL)
553 {
554 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
555 goto err;
556 }
557 if (EVP_MD_CTX_type(mdc) == j)
558 break;
559 else
560 btmp=btmp->next_bio;
561 }
562
563 /* We now have the EVP_MD_CTX, lets do the
564 * signing. */
565 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
566 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
567 {
568 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
569 goto err;
570 }
571
572 sk=si->auth_attr;
573
574 /* If there are attributes, we add the digest
575 * attribute and only sign the attributes */
576 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
577 {
578 unsigned char md_data[EVP_MAX_MD_SIZE];
579 unsigned int md_len;
580 ASN1_OCTET_STRING *digest;
581 ASN1_UTCTIME *sign_time;
582 const EVP_MD *md_tmp;
583
584 /* Add signing time */
585 sign_time=X509_gmtime_adj(NULL,0);
586 PKCS7_add_signed_attribute(si,
587 NID_pkcs9_signingTime,
588 V_ASN1_UTCTIME,sign_time);
589
590 /* Add digest */
591 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
592 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
593 digest=M_ASN1_OCTET_STRING_new();
594 M_ASN1_OCTET_STRING_set(digest,md_data,md_len);
595 PKCS7_add_signed_attribute(si,
596 NID_pkcs9_messageDigest,
597 V_ASN1_OCTET_STRING,digest);
598
599 /* Now sign the mess */
600 EVP_SignInit(&ctx_tmp,md_tmp);
601 x=i2d_ASN1_SET_OF_X509_ATTRIBUTE(sk,NULL,
602 i2d_X509_ATTRIBUTE,
603 V_ASN1_SET,V_ASN1_UNIVERSAL,IS_SET);
604 pp=(unsigned char *)Malloc(x);
605 p=pp;
606 i2d_ASN1_SET_OF_X509_ATTRIBUTE(sk,&p,
607 i2d_X509_ATTRIBUTE,
608 V_ASN1_SET,V_ASN1_UNIVERSAL,IS_SET);
609 EVP_SignUpdate(&ctx_tmp,pp,x);
610 Free(pp);
611 pp=NULL;
612 }
613
614 if (si->pkey->type == EVP_PKEY_DSA)
615 ctx_tmp.digest=EVP_dss1();
616
617 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
618 (unsigned int *)&buf->length,si->pkey))
619 {
620 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
621 goto err;
622 }
623 if (!ASN1_STRING_set(si->enc_digest,
624 (unsigned char *)buf->data,buf->length))
625 {
626 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
627 goto err;
628 }
629 }
630 }
631
632 if (!p7->detached)
633 {
634 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
635 if (btmp == NULL)
636 {
637 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
638 goto err;
639 }
640 BIO_get_mem_ptr(btmp,&buf_mem);
641 /* Mark the BIO read only then we can use its copy of the data
642 * instead of making an extra copy.
643 */
644 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
645 BIO_set_mem_eof_return(btmp, 0);
646 os->data = (unsigned char *)buf_mem->data;
647 os->length = buf_mem->length;
648#if 0
649 M_ASN1_OCTET_STRING_set(os,
650 (unsigned char *)buf_mem->data,buf_mem->length);
651#endif
652 }
653 if (pp != NULL) Free(pp);
654 pp=NULL;
655
656 ret=1;
657err:
658 if (buf != NULL) BUF_MEM_free(buf);
659 return(ret);
660 }
661
662int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
663 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
664 {
665 PKCS7_ISSUER_AND_SERIAL *ias;
666 int ret=0,i;
667 STACK_OF(X509) *cert;
668 X509 *x509;
669
670 if (PKCS7_type_is_signed(p7))
671 {
672 cert=p7->d.sign->cert;
673 }
674 else if (PKCS7_type_is_signedAndEnveloped(p7))
675 {
676 cert=p7->d.signed_and_enveloped->cert;
677 }
678 else
679 {
680 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
681 goto err;
682 }
683 /* XXXXXXXXXXXXXXXXXXXXXXX */
684 ias=si->issuer_and_serial;
685
686 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
687
688 /* were we able to find the cert in passed to us */
689 if (x509 == NULL)
690 {
691 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
692 goto err;
693 }
694
695 /* Lets verify */
696 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
697 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
698 i=X509_verify_cert(ctx);
699 if (i <= 0)
700 {
701 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
702 X509_STORE_CTX_cleanup(ctx);
703 goto err;
704 }
705 X509_STORE_CTX_cleanup(ctx);
706
707 return PKCS7_signatureVerify(bio, p7, si, x509);
708 err:
709 return ret;
710 }
711
712int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
713 X509 *x509)
714 {
715 ASN1_OCTET_STRING *os;
716 EVP_MD_CTX mdc_tmp,*mdc;
717 unsigned char *pp,*p;
718 int ret=0,i;
719 int md_type;
720 STACK_OF(X509_ATTRIBUTE) *sk;
721 BIO *btmp;
722 EVP_PKEY *pkey;
723
724 if (!PKCS7_type_is_signed(p7) &&
725 !PKCS7_type_is_signedAndEnveloped(p7)) {
726 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
727 PKCS7_R_WRONG_PKCS7_TYPE);
728 goto err;
729 }
730
731 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
732
733 btmp=bio;
734 for (;;)
735 {
736 if ((btmp == NULL) ||
737 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
738 {
739 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
740 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
741 goto err;
742 }
743 BIO_get_md_ctx(btmp,&mdc);
744 if (mdc == NULL)
745 {
746 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
747 PKCS7_R_INTERNAL_ERROR);
748 goto err;
749 }
750 if (EVP_MD_CTX_type(mdc) == md_type)
751 break;
752 btmp=btmp->next_bio;
753 }
754
755 /* mdc is the digest ctx that we want, unless there are attributes,
756 * in which case the digest is the signed attributes */
757 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
758
759 sk=si->auth_attr;
760 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
761 {
762 unsigned char md_dat[EVP_MAX_MD_SIZE];
763 unsigned int md_len;
764 ASN1_OCTET_STRING *message_digest;
765
766 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
767 message_digest=PKCS7_digest_from_attributes(sk);
768 if (!message_digest)
769 {
770 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
771 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
772 goto err;
773 }
774 if ((message_digest->length != (int)md_len) ||
775 (memcmp(message_digest->data,md_dat,md_len)))
776 {
777#if 0
778{
779int ii;
780for (ii=0; ii<message_digest->length; ii++)
781 printf("%02X",message_digest->data[ii]); printf(" sent\n");
782for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
783}
784#endif
785 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
786 PKCS7_R_DIGEST_FAILURE);
787 ret= -1;
788 goto err;
789 }
790
791 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
792 /* Note: when forming the encoding of the attributes we
793 * shouldn't reorder them or this will break the signature.
794 * This is done by using the IS_SEQUENCE flag.
795 */
796 i=i2d_ASN1_SET_OF_X509_ATTRIBUTE(sk,NULL,i2d_X509_ATTRIBUTE,
797 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
798 pp=Malloc(i);
799 p=pp;
800 i2d_ASN1_SET_OF_X509_ATTRIBUTE(sk,&p,i2d_X509_ATTRIBUTE,
801 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
802 EVP_VerifyUpdate(&mdc_tmp,pp,i);
803
804 Free(pp);
805 }
806
807 os=si->enc_digest;
808 pkey = X509_get_pubkey(x509);
809 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
810
811 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
812 EVP_PKEY_free(pkey);
813 if (i <= 0)
814 {
815 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
816 PKCS7_R_SIGNATURE_FAILURE);
817 ret= -1;
818 goto err;
819 }
820 else
821 ret=1;
822err:
823 return(ret);
824 }
825
826PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
827 {
828 STACK_OF(PKCS7_RECIP_INFO) *rsk;
829 PKCS7_RECIP_INFO *ri;
830 int i;
831
832 i=OBJ_obj2nid(p7->type);
833 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
834 rsk=p7->d.signed_and_enveloped->recipientinfo;
835 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
836 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
837 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
838 return(ri->issuer_and_serial);
839 }
840
841ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
842 {
843 return(get_attribute(si->auth_attr,nid));
844 }
845
846ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
847 {
848 return(get_attribute(si->unauth_attr,nid));
849 }
850
851static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
852 {
853 int i;
854 X509_ATTRIBUTE *xa;
855 ASN1_OBJECT *o;
856
857 o=OBJ_nid2obj(nid);
858 if (!o || !sk) return(NULL);
859 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
860 {
861 xa=sk_X509_ATTRIBUTE_value(sk,i);
862 if (OBJ_cmp(xa->object,o) == 0)
863 {
864 if (xa->set && sk_ASN1_TYPE_num(xa->value.set))
865 return(sk_ASN1_TYPE_value(xa->value.set,0));
866 else
867 return(NULL);
868 }
869 }
870 return(NULL);
871 }
872
873ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
874{
875 ASN1_TYPE *astype;
876 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
877 return astype->value.octet_string;
878}
879
880int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
881 STACK_OF(X509_ATTRIBUTE) *sk)
882 {
883 int i;
884
885 if (p7si->auth_attr != NULL)
886 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
887 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
888 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
889 {
890 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
891 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
892 == NULL)
893 return(0);
894 }
895 return(1);
896 }
897
898int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
899 {
900 int i;
901
902 if (p7si->unauth_attr != NULL)
903 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
904 X509_ATTRIBUTE_free);
905 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
906 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
907 {
908 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
909 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
910 == NULL)
911 return(0);
912 }
913 return(1);
914 }
915
916int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
917 void *value)
918 {
919 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
920 }
921
922int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
923 void *value)
924 {
925 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
926 }
927
928static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
929 void *value)
930 {
931 X509_ATTRIBUTE *attr=NULL;
932
933 if (*sk == NULL)
934 {
935 *sk = sk_X509_ATTRIBUTE_new(NULL);
936new_attrib:
937 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
938 sk_X509_ATTRIBUTE_push(*sk,attr);
939 }
940 else
941 {
942 int i;
943
944 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
945 {
946 attr=sk_X509_ATTRIBUTE_value(*sk,i);
947 if (OBJ_obj2nid(attr->object) == nid)
948 {
949 X509_ATTRIBUTE_free(attr);
950 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
951 sk_X509_ATTRIBUTE_set(*sk,i,attr);
952 goto end;
953 }
954 }
955 goto new_attrib;
956 }
957end:
958 return(1);
959 }
960
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-03 18:42:26 +0000