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Import of old SSLeay release: SSLeay 0.9.1b (unreleased)
[thirdparty/openssl.git] / crypto / pkcs7 / pk7_doit.c
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 "rand.h"
62 #include "objects.h"
63 #include "x509.h"
64
65 static int add_attribute(STACK **sk, int nid, int atrtype, char *value);
66 static ASN1_TYPE *get_attribute(STACK *sk, int nid);
67
68 #if 1
69 BIO *PKCS7_dataInit(p7,bio)
70 PKCS7 *p7;
71 BIO *bio;
72 {
73 int i,j;
74 BIO *out=NULL,*btmp=NULL;
75 X509_ALGOR *xa;
76 EVP_MD *evp_md;
77 EVP_CIPHER *evp_cipher=NULL;
78 STACK *md_sk=NULL,*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 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm)));
95 if (evp_cipher == NULL)
96 {
97 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
98 goto err;
99 }
100 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
101 break;
102 case NID_pkcs7_enveloped:
103 rsk=p7->d.enveloped->recipientinfo;
104 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm)));
105 if (evp_cipher == NULL)
106 {
107 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
108 goto err;
109 }
110 xalg=p7->d.enveloped->enc_data->algorithm;
111 break;
112 default:
113 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
114 goto err;
115 }
116
117 if (md_sk != NULL)
118 {
119 for (i=0; i<sk_num(md_sk); i++)
120 {
121 xa=(X509_ALGOR *)sk_value(md_sk,i);
122 if ((btmp=BIO_new(BIO_f_md())) == NULL)
123 {
124 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
125 goto err;
126 }
127
128 j=OBJ_obj2nid(xa->algorithm);
129 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
130 if (evp_md == NULL)
131 {
132 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
133 goto err;
134 }
135
136 BIO_set_md(btmp,evp_md);
137 if (out == NULL)
138 out=btmp;
139 else
140 BIO_push(out,btmp);
141 btmp=NULL;
142 }
143 }
144
145 if (evp_cipher != NULL)
146 {
147 unsigned char key[EVP_MAX_KEY_LENGTH];
148 unsigned char iv[EVP_MAX_IV_LENGTH];
149 int keylen,ivlen;
150 int jj,max;
151 unsigned char *tmp;
152
153 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
154 {
155 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
156 goto err;
157 }
158 keylen=EVP_CIPHER_key_length(evp_cipher);
159 ivlen=EVP_CIPHER_iv_length(evp_cipher);
160
161 if (ivlen > 0)
162 {
163 ASN1_OCTET_STRING *os;
164
165 RAND_bytes(iv,ivlen);
166 os=ASN1_OCTET_STRING_new();
167 ASN1_OCTET_STRING_set(os,iv,ivlen);
168 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX this needs to change */
169 if (xalg->parameter == NULL)
170 xalg->parameter=ASN1_TYPE_new();
171 ASN1_TYPE_set(xalg->parameter,V_ASN1_OCTET_STRING,
172 (char *)os);
173 }
174 RAND_bytes(key,keylen);
175
176 /* Lets do the pub key stuff :-) */
177 max=0;
178 for (i=0; i<sk_num(rsk); i++)
179 {
180 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
181 if (ri->cert == NULL)
182 {
183 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
184 goto err;
185 }
186 pkey=X509_get_pubkey(ri->cert);
187 jj=EVP_PKEY_size(pkey);
188 if (max < jj) max=jj;
189 }
190 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
191 {
192 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
193 goto err;
194 }
195 for (i=0; i<sk_num(rsk); i++)
196 {
197 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
198 pkey=X509_get_pubkey(ri->cert);
199 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
200 if (jj <= 0)
201 {
202 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
203 Free(tmp);
204 goto err;
205 }
206 ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
207 }
208 Free(tmp);
209
210 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
211
212 if (out == NULL)
213 out=btmp;
214 else
215 BIO_push(out,btmp);
216 btmp=NULL;
217 }
218
219 if (bio == NULL) /* ??????????? */
220 {
221 if (p7->detached)
222 bio=BIO_new(BIO_s_null());
223 else
224 {
225 bio=BIO_new(BIO_s_mem());
226 /* We need to set this so that when we have read all
227 * the data, the encrypt BIO, if present, will read
228 * EOF and encode the last few bytes */
229 BIO_set_mem_eof_return(bio,0);
230
231 if (PKCS7_type_is_signed(p7) &&
232 PKCS7_type_is_data(p7->d.sign->contents))
233 {
234 ASN1_OCTET_STRING *os;
235
236 os=p7->d.sign->contents->d.data;
237 if (os->length > 0)
238 BIO_write(bio,(char *)os->data,
239 os->length);
240 }
241 }
242 }
243 BIO_push(out,bio);
244 bio=NULL;
245 if (0)
246 {
247 err:
248 if (out != NULL)
249 BIO_free_all(out);
250 if (btmp != NULL)
251 BIO_free_all(btmp);
252 out=NULL;
253 }
254 return(out);
255 }
256
257 /* int */
258 BIO *PKCS7_dataDecode(p7,pkey,in_bio,xs)
259 PKCS7 *p7;
260 EVP_PKEY *pkey;
261 BIO *in_bio;
262 X509_STORE *xs;
263 {
264 int i,j;
265 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
266 char *tmp=NULL;
267 X509_ALGOR *xa;
268 ASN1_OCTET_STRING *data_body=NULL;
269 EVP_MD *evp_md;
270 EVP_CIPHER *evp_cipher=NULL;
271 EVP_CIPHER_CTX *evp_ctx=NULL;
272 X509_ALGOR *enc_alg=NULL;
273 STACK *md_sk=NULL,*rsk=NULL;
274 X509_ALGOR *xalg=NULL;
275 PKCS7_RECIP_INFO *ri=NULL;
276 /* EVP_PKEY *pkey; */
277 #if 0
278 X509_STORE_CTX s_ctx;
279 #endif
280
281 i=OBJ_obj2nid(p7->type);
282 p7->state=PKCS7_S_HEADER;
283
284 switch (i)
285 {
286 case NID_pkcs7_signed:
287 data_body=p7->d.sign->contents->d.data;
288 md_sk=p7->d.sign->md_algs;
289 break;
290 case NID_pkcs7_signedAndEnveloped:
291 rsk=p7->d.signed_and_enveloped->recipientinfo;
292 md_sk=p7->d.signed_and_enveloped->md_algs;
293 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
294 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
295 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
296 if (evp_cipher == NULL)
297 {
298 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
299 goto err;
300 }
301 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
302 break;
303 case NID_pkcs7_enveloped:
304 rsk=p7->d.enveloped->recipientinfo;
305 enc_alg=p7->d.enveloped->enc_data->algorithm;
306 data_body=p7->d.enveloped->enc_data->enc_data;
307 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
308 if (evp_cipher == NULL)
309 {
310 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
311 goto err;
312 }
313 xalg=p7->d.enveloped->enc_data->algorithm;
314 break;
315 default:
316 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
317 goto err;
318 }
319
320 /* We will be checking the signature */
321 if (md_sk != NULL)
322 {
323 for (i=0; i<sk_num(md_sk); i++)
324 {
325 xa=(X509_ALGOR *)sk_value(md_sk,i);
326 if ((btmp=BIO_new(BIO_f_md())) == NULL)
327 {
328 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
329 goto err;
330 }
331
332 j=OBJ_obj2nid(xa->algorithm);
333 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
334 if (evp_md == NULL)
335 {
336 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
337 goto err;
338 }
339
340 BIO_set_md(btmp,evp_md);
341 if (out == NULL)
342 out=btmp;
343 else
344 BIO_push(out,btmp);
345 btmp=NULL;
346 }
347 }
348
349 if (evp_cipher != NULL)
350 {
351 #if 0
352 unsigned char key[EVP_MAX_KEY_LENGTH];
353 unsigned char iv[EVP_MAX_IV_LENGTH];
354 unsigned char *p;
355 int keylen,ivlen;
356 int max;
357 X509_OBJECT ret;
358 #endif
359 int jj;
360
361 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
362 {
363 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
364 goto err;
365 }
366
367 /* It was encrypted, we need to decrypt the secret key
368 * with the private key */
369
370 /* We need to find a private key for one of the people in the
371 * recipentinfo list */
372 if (rsk == NULL)
373 return(NULL);
374
375 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
376 #if 0
377 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
378 for (i=0; i<sk_num(rsk); i++)
379 {
380 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
381 uf (X509_STORE_get_by_issuer_serial(&s_ctx,
382 X509_LU_PKEY,
383 ri->issuer_and_serial->issuer,
384 ri->issuer_and_serial->serial,
385 &ret))
386 break;
387 ri=NULL;
388 }
389 if (ri == NULL) return(NULL);
390 pkey=ret.data.pkey;
391 #endif
392 if (pkey == NULL)
393 {
394 return(NULL);
395 }
396
397 jj=EVP_PKEY_size(pkey);
398 tmp=Malloc(jj+10);
399 if (tmp == NULL)
400 {
401 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
402 goto err;
403 }
404
405 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
406 ASN1_STRING_data(ri->enc_key),
407 ASN1_STRING_length(ri->enc_key),
408 pkey);
409 if (jj <= 0)
410 {
411 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
412 goto err;
413 }
414
415 evp_ctx=NULL;
416 BIO_get_cipher_ctx(etmp,&evp_ctx);
417 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
418 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
419 return(NULL);
420
421 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
422 {
423 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
424 goto err;
425 }
426 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
427
428 memset(tmp,0,jj);
429
430 if (out == NULL)
431 out=etmp;
432 else
433 BIO_push(out,etmp);
434 etmp=NULL;
435 }
436
437 #if 1
438 if (p7->detached || (in_bio != NULL))
439 {
440 bio=in_bio;
441 }
442 else
443 {
444 bio=BIO_new(BIO_s_mem());
445 /* We need to set this so that when we have read all
446 * the data, the encrypt BIO, if present, will read
447 * EOF and encode the last few bytes */
448 BIO_set_mem_eof_return(bio,0);
449
450 if (data_body->length > 0)
451 BIO_write(bio,(char *)data_body->data,data_body->length);
452 }
453 BIO_push(out,bio);
454 bio=NULL;
455 #endif
456 if (0)
457 {
458 err:
459 if (out != NULL) BIO_free_all(out);
460 if (btmp != NULL) BIO_free_all(btmp);
461 if (etmp != NULL) BIO_free_all(etmp);
462 if (bio != NULL) BIO_free_all(bio);
463 out=NULL;
464 }
465 if (tmp != NULL)
466 Free(tmp);
467 return(out);
468 }
469 #endif
470
471 int PKCS7_dataFinal(p7,bio)
472 PKCS7 *p7;
473 BIO *bio;
474 {
475 int ret=0;
476 int i,j;
477 BIO *btmp;
478 BUF_MEM *buf_mem=NULL;
479 BUF_MEM *buf=NULL;
480 PKCS7_SIGNER_INFO *si;
481 EVP_MD_CTX *mdc,ctx_tmp;
482 STACK *sk,*si_sk=NULL;
483 unsigned char *p,*pp=NULL;
484 int x;
485 ASN1_OCTET_STRING *os=NULL;
486
487 i=OBJ_obj2nid(p7->type);
488 p7->state=PKCS7_S_HEADER;
489
490 switch (i)
491 {
492 case NID_pkcs7_signedAndEnveloped:
493 /* XXXXXXXXXXXXXXXX */
494 si_sk=p7->d.signed_and_enveloped->signer_info;
495 os=ASN1_OCTET_STRING_new();
496 p7->d.signed_and_enveloped->enc_data->enc_data=os;
497 break;
498 case NID_pkcs7_enveloped:
499 /* XXXXXXXXXXXXXXXX */
500 os=ASN1_OCTET_STRING_new();
501 p7->d.enveloped->enc_data->enc_data=os;
502 break;
503 case NID_pkcs7_signed:
504 si_sk=p7->d.sign->signer_info;
505 os=p7->d.sign->contents->d.data;
506 break;
507 }
508
509 if (si_sk != NULL)
510 {
511 if ((buf=BUF_MEM_new()) == NULL)
512 {
513 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
514 goto err;
515 }
516 for (i=0; i<sk_num(si_sk); i++)
517 {
518 si=(PKCS7_SIGNER_INFO *)
519 sk_value(si_sk,i);
520 if (si->pkey == NULL) continue;
521
522 j=OBJ_obj2nid(si->digest_alg->algorithm);
523
524 btmp=bio;
525 for (;;)
526 {
527 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
528 == NULL)
529 {
530 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
531 goto err;
532 }
533 BIO_get_md_ctx(btmp,&mdc);
534 if (mdc == NULL)
535 {
536 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
537 goto err;
538 }
539 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
540 break;
541 else
542 btmp=btmp->next_bio;
543 }
544
545 /* We now have the EVP_MD_CTX, lets do the
546 * signing. */
547 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
548 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
549 {
550 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
551 goto err;
552 }
553
554 sk=si->auth_attr;
555
556 /* If there are attributes, we add the digest
557 * attribute and only sign the attributes */
558 if ((sk != NULL) && (sk_num(sk) != 0))
559 {
560 unsigned char md_data[EVP_MAX_MD_SIZE];
561 unsigned int md_len;
562 ASN1_OCTET_STRING *digest;
563 ASN1_UTCTIME *sign_time;
564 EVP_MD *md_tmp;
565
566 /* Add signing time */
567 sign_time=X509_gmtime_adj(NULL,0);
568 PKCS7_add_signed_attribute(si,
569 NID_pkcs9_signingTime,
570 V_ASN1_UTCTIME,(char *)sign_time);
571
572 /* Add digest */
573 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
574 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
575 digest=ASN1_OCTET_STRING_new();
576 ASN1_OCTET_STRING_set(digest,md_data,md_len);
577 PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
578 V_ASN1_OCTET_STRING,(char *)digest);
579
580 /* Now sign the mess */
581 EVP_SignInit(&ctx_tmp,md_tmp);
582 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
583 V_ASN1_SET,V_ASN1_UNIVERSAL);
584 pp=(unsigned char *)Malloc(x);
585 p=pp;
586 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
587 V_ASN1_SET,V_ASN1_UNIVERSAL);
588 EVP_SignUpdate(&ctx_tmp,pp,x);
589 Free(pp);
590 pp=NULL;
591 }
592
593 if (si->pkey->type == EVP_PKEY_DSA)
594 ctx_tmp.digest=EVP_dss1();
595
596 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
597 (unsigned int *)&buf->length,si->pkey))
598 {
599 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
600 goto err;
601 }
602 if (!ASN1_STRING_set(si->enc_digest,
603 (unsigned char *)buf->data,buf->length))
604 {
605 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
606 goto err;
607 }
608 }
609 }
610
611 if (p7->detached)
612 ASN1_OCTET_STRING_set(os,(unsigned char *)"",0);
613 else
614 {
615 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
616 if (btmp == NULL)
617 {
618 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
619 goto err;
620 }
621 BIO_get_mem_ptr(btmp,&buf_mem);
622 ASN1_OCTET_STRING_set(os,
623 (unsigned char *)buf_mem->data,buf_mem->length);
624 }
625 if (pp != NULL) Free(pp);
626 pp=NULL;
627
628 ret=1;
629 err:
630 if (buf != NULL) BUF_MEM_free(buf);
631 return(ret);
632 }
633
634 int PKCS7_dataVerify(cert_store,ctx,bio,p7,si)
635 X509_STORE *cert_store;
636 X509_STORE_CTX *ctx;
637 BIO *bio;
638 PKCS7 *p7;
639 PKCS7_SIGNER_INFO *si;
640 {
641 /* PKCS7_SIGNED *s; */
642 ASN1_OCTET_STRING *os;
643 EVP_MD_CTX mdc_tmp,*mdc;
644 unsigned char *pp,*p;
645 PKCS7_ISSUER_AND_SERIAL *ias;
646 int ret=0,i;
647 int md_type;
648 STACK *sk,*cert;
649 BIO *btmp;
650 X509 *x509;
651
652 if (PKCS7_type_is_signed(p7))
653 {
654 cert=p7->d.sign->cert;
655 }
656 else if (PKCS7_type_is_signedAndEnveloped(p7))
657 {
658 cert=p7->d.signed_and_enveloped->cert;
659 }
660 else
661 {
662 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
663 goto err;
664 }
665 /* XXXXXXXXXXXXXXXXXXXXXXX */
666 ias=si->issuer_and_serial;
667
668 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
669
670 /* were we able to find the cert in passed to us */
671 if (x509 == NULL)
672 {
673 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
674 goto err;
675 }
676
677 /* Lets verify */
678 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
679 i=X509_verify_cert(ctx);
680 if (i <= 0)
681 {
682 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
683 goto err;
684 }
685 X509_STORE_CTX_cleanup(ctx);
686
687 /* So we like 'x509', lets check the signature. */
688 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
689
690 btmp=bio;
691 for (;;)
692 {
693 if ((btmp == NULL) ||
694 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
695 {
696 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
697 goto err;
698 }
699 BIO_get_md_ctx(btmp,&mdc);
700 if (mdc == NULL)
701 {
702 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
703 goto err;
704 }
705 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
706 break;
707 btmp=btmp->next_bio;
708 }
709
710 /* mdc is the digest ctx that we want, unless there are attributes,
711 * in which case the digest is the signed attributes */
712 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
713
714 sk=si->auth_attr;
715 if ((sk != NULL) && (sk_num(sk) != 0))
716 {
717 unsigned char md_dat[EVP_MAX_MD_SIZE];
718 int md_len;
719 ASN1_OCTET_STRING *message_digest;
720
721 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
722 message_digest=PKCS7_digest_from_attributes(sk);
723 if (!message_digest)
724 {
725 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
726 goto err;
727 }
728 if ((message_digest->length != md_len) ||
729 (memcmp(message_digest->data,md_dat,md_len)))
730 {
731 #if 0
732 {
733 int ii;
734 for (ii=0; ii<message_digest->length; ii++)
735 printf("%02X",message_digest->data[ii]); printf(" sent\n");
736 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
737 }
738 #endif
739 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
740 ret= -1;
741 goto err;
742 }
743
744 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
745 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
746 V_ASN1_SET,V_ASN1_UNIVERSAL);
747 pp=(unsigned char *)Malloc(i);
748 p=pp;
749 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
750 V_ASN1_SET,V_ASN1_UNIVERSAL);
751 EVP_VerifyUpdate(&mdc_tmp,pp,i);
752 Free(pp);
753 }
754
755 os=si->enc_digest;
756 if (X509_get_pubkey(x509)->type == EVP_PKEY_DSA)
757 mdc_tmp.digest=EVP_dss1();
758
759 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length,
760 X509_get_pubkey(x509));
761 if (i <= 0)
762 {
763 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
764 ret= -1;
765 goto err;
766 }
767 else
768 ret=1;
769 err:
770 return(ret);
771 }
772
773 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(p7,idx)
774 PKCS7 *p7;
775 int idx;
776 {
777 STACK *rsk;
778 PKCS7_RECIP_INFO *ri;
779 int i;
780
781 i=OBJ_obj2nid(p7->type);
782 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
783 rsk=p7->d.signed_and_enveloped->recipientinfo;
784 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
785 if (sk_num(rsk) <= idx) return(NULL);
786 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
787 return(ri->issuer_and_serial);
788 }
789
790 ASN1_TYPE *PKCS7_get_signed_attribute(si,nid)
791 PKCS7_SIGNER_INFO *si;
792 int nid;
793 {
794 return(get_attribute(si->auth_attr,nid));
795 }
796
797 ASN1_TYPE *PKCS7_get_attribute(si,nid)
798 PKCS7_SIGNER_INFO *si;
799 int nid;
800 {
801 return(get_attribute(si->unauth_attr,nid));
802 }
803
804 static ASN1_TYPE *get_attribute(sk,nid)
805 STACK *sk;
806 int nid;
807 {
808 int i;
809 X509_ATTRIBUTE *xa;
810 ASN1_OBJECT *o;
811
812 o=OBJ_nid2obj(nid);
813 if (o == NULL) return(NULL);
814 for (i=0; i<sk_num(sk); i++)
815 {
816 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
817 if (OBJ_cmp(xa->object,o) == 0)
818 {
819 if (xa->set && sk_num(xa->value.set))
820 return((ASN1_TYPE *)sk_value(xa->value.set,0));
821 else
822 return(NULL);
823 }
824 }
825 return(NULL);
826 }
827
828 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(sk)
829 STACK *sk;
830 {
831 X509_ATTRIBUTE *attr;
832 ASN1_TYPE *astype;
833 int i;
834 if (!sk || !sk_num(sk)) return NULL;
835 /* Search the attributes for a digest */
836 for (i = 0; i < sk_num(sk); i++)
837 {
838 attr = (X509_ATTRIBUTE *) sk_value(sk, i);
839 if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest)
840 {
841 if (!attr->set) return NULL;
842 if (!attr->value.set ||
843 !sk_num (attr->value.set) ) return NULL;
844 astype = (ASN1_TYPE *) sk_value(attr->value.set, 0);
845 return astype->value.octet_string;
846 }
847 }
848 return NULL;
849 }
850
851 int PKCS7_set_signed_attributes(p7si,sk)
852 PKCS7_SIGNER_INFO *p7si;
853 STACK *sk;
854 {
855 int i;
856
857 if (p7si->auth_attr != NULL)
858 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
859 p7si->auth_attr=sk_dup(sk);
860 for (i=0; i<sk_num(sk); i++)
861 {
862 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
863 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
864 return(0);
865 }
866 return(1);
867 }
868
869 int PKCS7_set_attributes(p7si,sk)
870 PKCS7_SIGNER_INFO *p7si;
871 STACK *sk;
872 {
873 int i;
874
875 if (p7si->unauth_attr != NULL)
876 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
877 p7si->unauth_attr=sk_dup(sk);
878 for (i=0; i<sk_num(sk); i++)
879 {
880 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
881 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
882 return(0);
883 }
884 return(1);
885 }
886
887 int PKCS7_add_signed_attribute(p7si,nid,atrtype,value)
888 PKCS7_SIGNER_INFO *p7si;
889 int nid;
890 int atrtype;
891 char *value;
892 {
893 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
894 }
895
896 int PKCS7_add_attribute(p7si,nid,atrtype,value)
897 PKCS7_SIGNER_INFO *p7si;
898 int nid;
899 int atrtype;
900 char *value;
901 {
902 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
903 }
904
905 static int add_attribute(sk, nid, atrtype, value)
906 STACK **sk;
907 int nid;
908 int atrtype;
909 char *value;
910 {
911 X509_ATTRIBUTE *attr=NULL;
912 ASN1_TYPE *val=NULL;
913
914 if (*sk == NULL)
915 {
916 *sk = sk_new(NULL);
917 new_attrib:
918 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
919 sk_push(*sk,(char *)attr);
920 }
921 else
922 {
923 int i;
924
925 for (i=0; i<sk_num(*sk); i++)
926 {
927 attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
928 if (OBJ_obj2nid(attr->object) == nid)
929 {
930 X509_ATTRIBUTE_free(attr);
931 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
932 sk_value(*sk,i)=(char *)attr;
933 goto end;
934 }
935 }
936 goto new_attrib;
937 }
938 end:
939 return(1);
940 }
941
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