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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#include <openssl/err.h>
66
67static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
68 void *value);
69static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
70
71static int PKCS7_type_is_other(PKCS7* p7)
72 {
73 int isOther=1;
74
75 int nid=OBJ_obj2nid(p7->type);
76
77 switch( nid )
78 {
79 case NID_pkcs7_data:
80 case NID_pkcs7_signed:
81 case NID_pkcs7_enveloped:
82 case NID_pkcs7_signedAndEnveloped:
83 case NID_pkcs7_digest:
84 case NID_pkcs7_encrypted:
85 isOther=0;
86 break;
87 default:
88 isOther=1;
89 }
90
91 return isOther;
92
93 }
94
95static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
96 {
97 if ( PKCS7_type_is_data(p7))
98 return p7->d.data;
99 if ( PKCS7_type_is_other(p7) && p7->d.other
100 && (p7->d.other->type == V_ASN1_OCTET_STRING))
101 return p7->d.other->value.octet_string;
102 return NULL;
103 }
104
105static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
106 {
107 BIO *btmp;
108 const EVP_MD *md;
109 if ((btmp=BIO_new(BIO_f_md())) == NULL)
110 {
111 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
112 goto err;
113 }
114
115 md=EVP_get_digestbyobj(alg->algorithm);
116 if (md == NULL)
117 {
118 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
119 goto err;
120 }
121
122 BIO_set_md(btmp,md);
123 if (*pbio == NULL)
124 *pbio=btmp;
125 else if (!BIO_push(*pbio,btmp))
126 {
127 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
128 goto err;
129 }
130 btmp=NULL;
131
132 return 1;
133
134 err:
135 if (btmp)
136 BIO_free(btmp);
137 return 0;
138
139 }
140
141static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
142 unsigned char *key, int keylen)
143 {
144 EVP_PKEY_CTX *pctx = NULL;
145 EVP_PKEY *pkey = NULL;
146 unsigned char *ek = NULL;
147 int ret = 0;
148 size_t eklen;
149
150 pkey = X509_get_pubkey(ri->cert);
151
152 if (!pkey)
153 return 0;
154
155 pctx = EVP_PKEY_CTX_new(pkey, NULL);
156 if (!pctx)
157 return 0;
158
159 if (EVP_PKEY_encrypt_init(pctx) <= 0)
160 goto err;
161
162 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
163 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0)
164 {
165 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
166 goto err;
167 }
168
169 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
170 goto err;
171
172 ek = OPENSSL_malloc(eklen);
173
174 if (ek == NULL)
175 {
176 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
177 goto err;
178 }
179
180 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
181 goto err;
182
183 ASN1_STRING_set0(ri->enc_key, ek, eklen);
184 ek = NULL;
185
186 ret = 1;
187
188 err:
189 if (pkey)
190 EVP_PKEY_free(pkey);
191 if (pctx)
192 EVP_PKEY_CTX_free(pctx);
193 if (ek)
194 OPENSSL_free(ek);
195 return ret;
196
197 }
198
199
200static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
201 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
202 {
203 EVP_PKEY_CTX *pctx = NULL;
204 unsigned char *ek = NULL;
205 size_t eklen;
206
207 int ret = 0;
208
209 pctx = EVP_PKEY_CTX_new(pkey, NULL);
210 if (!pctx)
211 return 0;
212
213 if (EVP_PKEY_decrypt_init(pctx) <= 0)
214 goto err;
215
216 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
217 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0)
218 {
219 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
220 goto err;
221 }
222
223 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
224 ri->enc_key->data, ri->enc_key->length) <= 0)
225 goto err;
226
227 ek = OPENSSL_malloc(eklen);
228
229 if (ek == NULL)
230 {
231 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
232 goto err;
233 }
234
235 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
236 ri->enc_key->data, ri->enc_key->length) <= 0)
237 {
238 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
239 goto err;
240 }
241
242 ret = 1;
243
244 *pek = ek;
245 *peklen = eklen;
246
247 err:
248 if (pctx)
249 EVP_PKEY_CTX_free(pctx);
250 if (!ret && ek)
251 OPENSSL_free(ek);
252
253 return ret;
254 }
255
256BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
257 {
258 int i;
259 BIO *out=NULL,*btmp=NULL;
260 X509_ALGOR *xa = NULL;
261 const EVP_CIPHER *evp_cipher=NULL;
262 STACK_OF(X509_ALGOR) *md_sk=NULL;
263 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
264 X509_ALGOR *xalg=NULL;
265 PKCS7_RECIP_INFO *ri=NULL;
266 ASN1_OCTET_STRING *os=NULL;
267
268 i=OBJ_obj2nid(p7->type);
269 p7->state=PKCS7_S_HEADER;
270
271 switch (i)
272 {
273 case NID_pkcs7_signed:
274 md_sk=p7->d.sign->md_algs;
275 os = PKCS7_get_octet_string(p7->d.sign->contents);
276 break;
277 case NID_pkcs7_signedAndEnveloped:
278 rsk=p7->d.signed_and_enveloped->recipientinfo;
279 md_sk=p7->d.signed_and_enveloped->md_algs;
280 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
281 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
282 if (evp_cipher == NULL)
283 {
284 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
285 PKCS7_R_CIPHER_NOT_INITIALIZED);
286 goto err;
287 }
288 break;
289 case NID_pkcs7_enveloped:
290 rsk=p7->d.enveloped->recipientinfo;
291 xalg=p7->d.enveloped->enc_data->algorithm;
292 evp_cipher=p7->d.enveloped->enc_data->cipher;
293 if (evp_cipher == NULL)
294 {
295 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
296 PKCS7_R_CIPHER_NOT_INITIALIZED);
297 goto err;
298 }
299 break;
300 case NID_pkcs7_digest:
301 xa = p7->d.digest->md;
302 os = PKCS7_get_octet_string(p7->d.digest->contents);
303 break;
304 case NID_pkcs7_data:
305 break;
306 default:
307 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
308 goto err;
309 }
310
311 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
312 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
313 goto err;
314
315 if (xa && !PKCS7_bio_add_digest(&out, xa))
316 goto err;
317
318 if (evp_cipher != NULL)
319 {
320 unsigned char key[EVP_MAX_KEY_LENGTH];
321 unsigned char iv[EVP_MAX_IV_LENGTH];
322 int keylen,ivlen;
323 EVP_CIPHER_CTX *ctx;
324
325 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
326 {
327 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
328 goto err;
329 }
330 BIO_get_cipher_ctx(btmp, &ctx);
331 keylen=EVP_CIPHER_key_length(evp_cipher);
332 ivlen=EVP_CIPHER_iv_length(evp_cipher);
333 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
334 if (ivlen > 0)
335 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
336 goto err;
337 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
338 goto err;
339 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
340 goto err;
341 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
342 goto err;
343
344 if (ivlen > 0) {
345 if (xalg->parameter == NULL) {
346 xalg->parameter = ASN1_TYPE_new();
347 if (xalg->parameter == NULL)
348 goto err;
349 }
350 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
351 goto err;
352 }
353
354 /* Lets do the pub key stuff :-) */
355 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
356 {
357 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
358 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
359 goto err;
360 }
361 OPENSSL_cleanse(key, keylen);
362
363 if (out == NULL)
364 out=btmp;
365 else
366 BIO_push(out,btmp);
367 btmp=NULL;
368 }
369
370 if (bio == NULL)
371 {
372 if (PKCS7_is_detached(p7))
373 bio=BIO_new(BIO_s_null());
374 else if (os && os->length > 0)
375 bio = BIO_new_mem_buf(os->data, os->length);
376 if(bio == NULL)
377 {
378 bio=BIO_new(BIO_s_mem());
379 if (bio == NULL)
380 goto err;
381 BIO_set_mem_eof_return(bio,0);
382 }
383 }
384 if (out)
385 BIO_push(out,bio);
386 else
387 out = bio;
388 bio=NULL;
389 if (0)
390 {
391err:
392 if (out != NULL)
393 BIO_free_all(out);
394 if (btmp != NULL)
395 BIO_free_all(btmp);
396 out=NULL;
397 }
398 return(out);
399 }
400
401static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
402 {
403 int ret;
404 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
405 pcert->cert_info->issuer);
406 if (ret)
407 return ret;
408 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
409 ri->issuer_and_serial->serial);
410 }
411
412/* int */
413BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
414 {
415 int i,j;
416 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
417 X509_ALGOR *xa;
418 ASN1_OCTET_STRING *data_body=NULL;
419 const EVP_MD *evp_md;
420 const EVP_CIPHER *evp_cipher=NULL;
421 EVP_CIPHER_CTX *evp_ctx=NULL;
422 X509_ALGOR *enc_alg=NULL;
423 STACK_OF(X509_ALGOR) *md_sk=NULL;
424 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
425 X509_ALGOR *xalg=NULL;
426 PKCS7_RECIP_INFO *ri=NULL;
427
428 i=OBJ_obj2nid(p7->type);
429 p7->state=PKCS7_S_HEADER;
430
431 switch (i)
432 {
433 case NID_pkcs7_signed:
434 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
435 md_sk=p7->d.sign->md_algs;
436 break;
437 case NID_pkcs7_signedAndEnveloped:
438 rsk=p7->d.signed_and_enveloped->recipientinfo;
439 md_sk=p7->d.signed_and_enveloped->md_algs;
440 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
441 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
442 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
443 if (evp_cipher == NULL)
444 {
445 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
446 goto err;
447 }
448 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
449 break;
450 case NID_pkcs7_enveloped:
451 rsk=p7->d.enveloped->recipientinfo;
452 enc_alg=p7->d.enveloped->enc_data->algorithm;
453 data_body=p7->d.enveloped->enc_data->enc_data;
454 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
455 if (evp_cipher == NULL)
456 {
457 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
458 goto err;
459 }
460 xalg=p7->d.enveloped->enc_data->algorithm;
461 break;
462 default:
463 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
464 goto err;
465 }
466
467 /* We will be checking the signature */
468 if (md_sk != NULL)
469 {
470 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
471 {
472 xa=sk_X509_ALGOR_value(md_sk,i);
473 if ((btmp=BIO_new(BIO_f_md())) == NULL)
474 {
475 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
476 goto err;
477 }
478
479 j=OBJ_obj2nid(xa->algorithm);
480 evp_md=EVP_get_digestbynid(j);
481 if (evp_md == NULL)
482 {
483 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
484 goto err;
485 }
486
487 BIO_set_md(btmp,evp_md);
488 if (out == NULL)
489 out=btmp;
490 else
491 BIO_push(out,btmp);
492 btmp=NULL;
493 }
494 }
495
496 if (evp_cipher != NULL)
497 {
498#if 0
499 unsigned char key[EVP_MAX_KEY_LENGTH];
500 unsigned char iv[EVP_MAX_IV_LENGTH];
501 unsigned char *p;
502 int keylen,ivlen;
503 int max;
504 X509_OBJECT ret;
505#endif
506 unsigned char *ek = NULL;
507 int eklen;
508
509 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
510 {
511 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
512 goto err;
513 }
514
515 /* It was encrypted, we need to decrypt the secret key
516 * with the private key */
517
518 /* Find the recipientInfo which matches the passed certificate
519 * (if any)
520 */
521
522 if (pcert)
523 {
524 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
525 {
526 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
527 if (!pkcs7_cmp_ri(ri, pcert))
528 break;
529 ri=NULL;
530 }
531 if (ri == NULL)
532 {
533 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
534 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
535 goto err;
536 }
537 }
538
539 /* If we haven't got a certificate try each ri in turn */
540
541 if (pcert == NULL)
542 {
543 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
544 {
545 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
546 if (pkcs7_decrypt_rinfo(&ek, &eklen,
547 ri, pkey) > 0)
548 break;
549 ERR_clear_error();
550 ri = NULL;
551 }
552 if (ri == NULL)
553 {
554 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
555 PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
556 goto err;
557 }
558 }
559 else
560 {
561 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) <= 0)
562 goto err;
563 }
564
565 evp_ctx=NULL;
566 BIO_get_cipher_ctx(etmp,&evp_ctx);
567 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
568 goto err;
569 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
570 goto err;
571
572 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
573 /* Some S/MIME clients don't use the same key
574 * and effective key length. The key length is
575 * determined by the size of the decrypted RSA key.
576 */
577 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
578 {
579 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
580 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
581 goto err;
582 }
583 }
584 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
585 goto err;
586
587 if (ek)
588 {
589 OPENSSL_cleanse(ek,eklen);
590 OPENSSL_free(ek);
591 }
592
593 if (out == NULL)
594 out=etmp;
595 else
596 BIO_push(out,etmp);
597 etmp=NULL;
598 }
599
600#if 1
601 if (PKCS7_is_detached(p7) || (in_bio != NULL))
602 {
603 bio=in_bio;
604 }
605 else
606 {
607#if 0
608 bio=BIO_new(BIO_s_mem());
609 /* We need to set this so that when we have read all
610 * the data, the encrypt BIO, if present, will read
611 * EOF and encode the last few bytes */
612 BIO_set_mem_eof_return(bio,0);
613
614 if (data_body->length > 0)
615 BIO_write(bio,(char *)data_body->data,data_body->length);
616#else
617 if (data_body->length > 0)
618 bio = BIO_new_mem_buf(data_body->data,data_body->length);
619 else {
620 bio=BIO_new(BIO_s_mem());
621 BIO_set_mem_eof_return(bio,0);
622 }
623 if (bio == NULL)
624 goto err;
625#endif
626 }
627 BIO_push(out,bio);
628 bio=NULL;
629#endif
630 if (0)
631 {
632err:
633 if (out != NULL) BIO_free_all(out);
634 if (btmp != NULL) BIO_free_all(btmp);
635 if (etmp != NULL) BIO_free_all(etmp);
636 if (bio != NULL) BIO_free_all(bio);
637 out=NULL;
638 }
639 return(out);
640 }
641
642static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
643 {
644 for (;;)
645 {
646 bio=BIO_find_type(bio,BIO_TYPE_MD);
647 if (bio == NULL)
648 {
649 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
650 return NULL;
651 }
652 BIO_get_md_ctx(bio,pmd);
653 if (*pmd == NULL)
654 {
655 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
656 return NULL;
657 }
658 if (EVP_MD_CTX_type(*pmd) == nid)
659 return bio;
660 bio=BIO_next(bio);
661 }
662 return NULL;
663 }
664
665static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
666 {
667 unsigned char md_data[EVP_MAX_MD_SIZE];
668 unsigned int md_len;
669
670 /* Add signing time if not already present */
671 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime))
672 {
673 if (!PKCS7_add0_attrib_signing_time(si, NULL))
674 {
675 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
676 ERR_R_MALLOC_FAILURE);
677 return 0;
678 }
679 }
680
681 /* Add digest */
682 EVP_DigestFinal_ex(mctx, md_data,&md_len);
683 if (!PKCS7_add1_attrib_digest(si, md_data, md_len))
684 {
685 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
686 return 0;
687 }
688
689 /* Now sign the attributes */
690 if (!PKCS7_SIGNER_INFO_sign(si))
691 return 0;
692
693 return 1;
694 }
695
696
697int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
698 {
699 int ret=0;
700 int i,j;
701 BIO *btmp;
702 PKCS7_SIGNER_INFO *si;
703 EVP_MD_CTX *mdc,ctx_tmp;
704 STACK_OF(X509_ATTRIBUTE) *sk;
705 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
706 ASN1_OCTET_STRING *os=NULL;
707
708 EVP_MD_CTX_init(&ctx_tmp);
709 i=OBJ_obj2nid(p7->type);
710 p7->state=PKCS7_S_HEADER;
711
712 switch (i)
713 {
714 case NID_pkcs7_data:
715 os = p7->d.data;
716 break;
717 case NID_pkcs7_signedAndEnveloped:
718 /* XXXXXXXXXXXXXXXX */
719 si_sk=p7->d.signed_and_enveloped->signer_info;
720 os = p7->d.signed_and_enveloped->enc_data->enc_data;
721 if (!os)
722 {
723 os=M_ASN1_OCTET_STRING_new();
724 if (!os)
725 {
726 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
727 goto err;
728 }
729 p7->d.signed_and_enveloped->enc_data->enc_data=os;
730 }
731 break;
732 case NID_pkcs7_enveloped:
733 /* XXXXXXXXXXXXXXXX */
734 os = p7->d.enveloped->enc_data->enc_data;
735 if (!os)
736 {
737 os=M_ASN1_OCTET_STRING_new();
738 if (!os)
739 {
740 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
741 goto err;
742 }
743 p7->d.enveloped->enc_data->enc_data=os;
744 }
745 break;
746 case NID_pkcs7_signed:
747 si_sk=p7->d.sign->signer_info;
748 os=PKCS7_get_octet_string(p7->d.sign->contents);
749 /* If detached data then the content is excluded */
750 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
751 M_ASN1_OCTET_STRING_free(os);
752 p7->d.sign->contents->d.data = NULL;
753 }
754 break;
755
756 case NID_pkcs7_digest:
757 os=PKCS7_get_octet_string(p7->d.digest->contents);
758 /* If detached data then the content is excluded */
759 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
760 {
761 M_ASN1_OCTET_STRING_free(os);
762 p7->d.digest->contents->d.data = NULL;
763 }
764 break;
765
766 default:
767 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
768 goto err;
769 }
770
771 if (si_sk != NULL)
772 {
773 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
774 {
775 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
776 if (si->pkey == NULL)
777 continue;
778
779 j = OBJ_obj2nid(si->digest_alg->algorithm);
780
781 btmp=bio;
782
783 btmp = PKCS7_find_digest(&mdc, btmp, j);
784
785 if (btmp == NULL)
786 goto err;
787
788 /* We now have the EVP_MD_CTX, lets do the
789 * signing. */
790 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
791
792 sk=si->auth_attr;
793
794 /* If there are attributes, we add the digest
795 * attribute and only sign the attributes */
796 if (sk_X509_ATTRIBUTE_num(sk) > 0)
797 {
798 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
799 goto err;
800 }
801 else
802 {
803 unsigned char *abuf = NULL;
804 unsigned int abuflen;
805 abuflen = EVP_PKEY_size(si->pkey);
806 abuf = OPENSSL_malloc(abuflen);
807 if (!abuf)
808 goto err;
809
810 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
811 si->pkey))
812 {
813 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
814 ERR_R_EVP_LIB);
815 goto err;
816 }
817 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
818 }
819 }
820 }
821 else if (i == NID_pkcs7_digest)
822 {
823 unsigned char md_data[EVP_MAX_MD_SIZE];
824 unsigned int md_len;
825 if (!PKCS7_find_digest(&mdc, bio,
826 OBJ_obj2nid(p7->d.digest->md->algorithm)))
827 goto err;
828 EVP_DigestFinal_ex(mdc,md_data,&md_len);
829 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
830 }
831
832 if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF))
833 {
834 char *cont;
835 long contlen;
836 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
837 if (btmp == NULL)
838 {
839 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
840 goto err;
841 }
842 contlen = BIO_get_mem_data(btmp, &cont);
843 /* Mark the BIO read only then we can use its copy of the data
844 * instead of making an extra copy.
845 */
846 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
847 BIO_set_mem_eof_return(btmp, 0);
848 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
849 }
850 ret=1;
851err:
852 EVP_MD_CTX_cleanup(&ctx_tmp);
853 return(ret);
854 }
855
856int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
857 {
858 EVP_MD_CTX mctx;
859 EVP_PKEY_CTX *pctx;
860 unsigned char *abuf = NULL;
861 int alen;
862 size_t siglen;
863 const EVP_MD *md = NULL;
864
865 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
866 if (md == NULL)
867 return 0;
868
869 EVP_MD_CTX_init(&mctx);
870 if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0)
871 goto err;
872
873 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
874 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0)
875 {
876 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
877 goto err;
878 }
879
880 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf,
881 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
882 if(!abuf)
883 goto err;
884 if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0)
885 goto err;
886 OPENSSL_free(abuf);
887 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
888 goto err;
889 abuf = OPENSSL_malloc(siglen);
890 if(!abuf)
891 goto err;
892 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
893 goto err;
894
895 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
896 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0)
897 {
898 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
899 goto err;
900 }
901
902 EVP_MD_CTX_cleanup(&mctx);
903
904 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
905
906 return 1;
907
908 err:
909 if (abuf)
910 OPENSSL_free(abuf);
911 EVP_MD_CTX_cleanup(&mctx);
912 return 0;
913
914 }
915
916int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
917 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
918 {
919 PKCS7_ISSUER_AND_SERIAL *ias;
920 int ret=0,i;
921 STACK_OF(X509) *cert;
922 X509 *x509;
923
924 if (PKCS7_type_is_signed(p7))
925 {
926 cert=p7->d.sign->cert;
927 }
928 else if (PKCS7_type_is_signedAndEnveloped(p7))
929 {
930 cert=p7->d.signed_and_enveloped->cert;
931 }
932 else
933 {
934 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
935 goto err;
936 }
937 /* XXXXXXXXXXXXXXXXXXXXXXX */
938 ias=si->issuer_and_serial;
939
940 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
941
942 /* were we able to find the cert in passed to us */
943 if (x509 == NULL)
944 {
945 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
946 goto err;
947 }
948
949 /* Lets verify */
950 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
951 {
952 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
953 goto err;
954 }
955 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
956 i=X509_verify_cert(ctx);
957 if (i <= 0)
958 {
959 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
960 X509_STORE_CTX_cleanup(ctx);
961 goto err;
962 }
963 X509_STORE_CTX_cleanup(ctx);
964
965 return PKCS7_signatureVerify(bio, p7, si, x509);
966 err:
967 return ret;
968 }
969
970int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
971 X509 *x509)
972 {
973 ASN1_OCTET_STRING *os;
974 EVP_MD_CTX mdc_tmp,*mdc;
975 int ret=0,i;
976 int md_type;
977 STACK_OF(X509_ATTRIBUTE) *sk;
978 BIO *btmp;
979 EVP_PKEY *pkey;
980
981 EVP_MD_CTX_init(&mdc_tmp);
982
983 if (!PKCS7_type_is_signed(p7) &&
984 !PKCS7_type_is_signedAndEnveloped(p7)) {
985 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
986 PKCS7_R_WRONG_PKCS7_TYPE);
987 goto err;
988 }
989
990 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
991
992 btmp=bio;
993 for (;;)
994 {
995 if ((btmp == NULL) ||
996 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
997 {
998 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
999 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1000 goto err;
1001 }
1002 BIO_get_md_ctx(btmp,&mdc);
1003 if (mdc == NULL)
1004 {
1005 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1006 ERR_R_INTERNAL_ERROR);
1007 goto err;
1008 }
1009 if (EVP_MD_CTX_type(mdc) == md_type)
1010 break;
1011 /* Workaround for some broken clients that put the signature
1012 * OID instead of the digest OID in digest_alg->algorithm
1013 */
1014 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1015 break;
1016 btmp=BIO_next(btmp);
1017 }
1018
1019 /* mdc is the digest ctx that we want, unless there are attributes,
1020 * in which case the digest is the signed attributes */
1021 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
1022
1023 sk=si->auth_attr;
1024 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1025 {
1026 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1027 unsigned int md_len;
1028 int alen;
1029 ASN1_OCTET_STRING *message_digest;
1030
1031 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
1032 message_digest=PKCS7_digest_from_attributes(sk);
1033 if (!message_digest)
1034 {
1035 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1036 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1037 goto err;
1038 }
1039 if ((message_digest->length != (int)md_len) ||
1040 (memcmp(message_digest->data,md_dat,md_len)))
1041 {
1042#if 0
1043{
1044int ii;
1045for (ii=0; ii<message_digest->length; ii++)
1046 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1047for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1048}
1049#endif
1050 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1051 PKCS7_R_DIGEST_FAILURE);
1052 ret= -1;
1053 goto err;
1054 }
1055
1056 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
1057
1058 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1059 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1060 if (alen <= 0)
1061 {
1062 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB);
1063 ret = -1;
1064 goto err;
1065 }
1066 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
1067
1068 OPENSSL_free(abuf);
1069 }
1070
1071 os=si->enc_digest;
1072 pkey = X509_get_pubkey(x509);
1073 if (!pkey)
1074 {
1075 ret = -1;
1076 goto err;
1077 }
1078
1079 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1080 EVP_PKEY_free(pkey);
1081 if (i <= 0)
1082 {
1083 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1084 PKCS7_R_SIGNATURE_FAILURE);
1085 ret= -1;
1086 goto err;
1087 }
1088 else
1089 ret=1;
1090err:
1091 EVP_MD_CTX_cleanup(&mdc_tmp);
1092 return(ret);
1093 }
1094
1095PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1096 {
1097 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1098 PKCS7_RECIP_INFO *ri;
1099 int i;
1100
1101 i=OBJ_obj2nid(p7->type);
1102 if (i != NID_pkcs7_signedAndEnveloped)
1103 return NULL;
1104 if (p7->d.signed_and_enveloped == NULL)
1105 return NULL;
1106 rsk=p7->d.signed_and_enveloped->recipientinfo;
1107 if (rsk == NULL)
1108 return NULL;
1109 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1110 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1111 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1112 return(ri->issuer_and_serial);
1113 }
1114
1115ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1116 {
1117 return(get_attribute(si->auth_attr,nid));
1118 }
1119
1120ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1121 {
1122 return(get_attribute(si->unauth_attr,nid));
1123 }
1124
1125static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1126 {
1127 int i;
1128 X509_ATTRIBUTE *xa;
1129 ASN1_OBJECT *o;
1130
1131 o=OBJ_nid2obj(nid);
1132 if (!o || !sk) return(NULL);
1133 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1134 {
1135 xa=sk_X509_ATTRIBUTE_value(sk,i);
1136 if (OBJ_cmp(xa->object,o) == 0)
1137 {
1138 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1139 return(sk_ASN1_TYPE_value(xa->value.set,0));
1140 else
1141 return(NULL);
1142 }
1143 }
1144 return(NULL);
1145 }
1146
1147ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1148{
1149 ASN1_TYPE *astype;
1150 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1151 return astype->value.octet_string;
1152}
1153
1154int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1155 STACK_OF(X509_ATTRIBUTE) *sk)
1156 {
1157 int i;
1158
1159 if (p7si->auth_attr != NULL)
1160 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1161 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1162 if (p7si->auth_attr == NULL)
1163 return 0;
1164 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1165 {
1166 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1167 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1168 == NULL)
1169 return(0);
1170 }
1171 return(1);
1172 }
1173
1174int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1175 {
1176 int i;
1177
1178 if (p7si->unauth_attr != NULL)
1179 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1180 X509_ATTRIBUTE_free);
1181 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1182 if (p7si->unauth_attr == NULL)
1183 return 0;
1184 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1185 {
1186 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1187 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1188 == NULL)
1189 return(0);
1190 }
1191 return(1);
1192 }
1193
1194int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1195 void *value)
1196 {
1197 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1198 }
1199
1200int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1201 void *value)
1202 {
1203 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1204 }
1205
1206static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1207 void *value)
1208 {
1209 X509_ATTRIBUTE *attr=NULL;
1210
1211 if (*sk == NULL)
1212 {
1213 *sk = sk_X509_ATTRIBUTE_new_null();
1214 if (*sk == NULL)
1215 return 0;
1216new_attrib:
1217 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1218 return 0;
1219 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1220 {
1221 X509_ATTRIBUTE_free(attr);
1222 return 0;
1223 }
1224 }
1225 else
1226 {
1227 int i;
1228
1229 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1230 {
1231 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1232 if (OBJ_obj2nid(attr->object) == nid)
1233 {
1234 X509_ATTRIBUTE_free(attr);
1235 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1236 if (attr == NULL)
1237 return 0;
1238 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1239 {
1240 X509_ATTRIBUTE_free(attr);
1241 return 0;
1242 }
1243 goto end;
1244 }
1245 }
1246 goto new_attrib;
1247 }
1248end:
1249 return(1);
1250 }
1251
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 17:40:15 +0000