Using int for the digest length in EVP_DigestFinal() broke some compilers.
[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                         EVP_PKEY_free(pkey);
189                         if (max < jj) max=jj;
190                         }
191                 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
192                         {
193                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
194                         goto err;
195                         }
196                 for (i=0; i<sk_num(rsk); i++)
197                         {
198                         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
199                         pkey=X509_get_pubkey(ri->cert);
200                         jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
201                         EVP_PKEY_free(pkey);
202                         if (jj <= 0)
203                                 {
204                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
205                                 Free(tmp);
206                                 goto err;
207                                 }
208                         ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
209                         }
210                 Free(tmp);
211
212                 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
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                 {
223                 if (p7->detached)
224                         bio=BIO_new(BIO_s_null());
225                 else
226                         {
227                         bio=BIO_new(BIO_s_mem());
228                         /* We need to set this so that when we have read all
229                          * the data, the encrypt BIO, if present, will read
230                          * EOF and encode the last few bytes */
231                         BIO_set_mem_eof_return(bio,0);
232
233                         if (PKCS7_type_is_signed(p7) &&
234                                 PKCS7_type_is_data(p7->d.sign->contents))
235                                 {
236                                 ASN1_OCTET_STRING *os;
237
238                                 os=p7->d.sign->contents->d.data;
239                                 if (os->length > 0)
240                                         BIO_write(bio,(char *)os->data,
241                                                 os->length);
242                                 }
243                         }
244                 }
245         BIO_push(out,bio);
246         bio=NULL;
247         if (0)
248                 {
249 err:
250                 if (out != NULL)
251                         BIO_free_all(out);
252                 if (btmp != NULL)
253                         BIO_free_all(btmp);
254                 out=NULL;
255                 }
256         return(out);
257         }
258
259 /* int */
260 BIO *PKCS7_dataDecode(p7,pkey,in_bio,xs)
261 PKCS7 *p7;
262 EVP_PKEY *pkey;
263 BIO *in_bio;
264 X509_STORE *xs;
265         {
266         int i,j;
267         BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
268         char *tmp=NULL;
269         X509_ALGOR *xa;
270         ASN1_OCTET_STRING *data_body=NULL;
271         EVP_MD *evp_md;
272         EVP_CIPHER *evp_cipher=NULL;
273         EVP_CIPHER_CTX *evp_ctx=NULL;
274         X509_ALGOR *enc_alg=NULL;
275         STACK *md_sk=NULL,*rsk=NULL;
276         X509_ALGOR *xalg=NULL;
277         PKCS7_RECIP_INFO *ri=NULL;
278 /*      EVP_PKEY *pkey; */
279 #if 0
280         X509_STORE_CTX s_ctx;
281 #endif
282
283         i=OBJ_obj2nid(p7->type);
284         p7->state=PKCS7_S_HEADER;
285
286         switch (i)
287                 {
288         case NID_pkcs7_signed:
289                 data_body=p7->d.sign->contents->d.data;
290                 md_sk=p7->d.sign->md_algs;
291                 break;
292         case NID_pkcs7_signedAndEnveloped:
293                 rsk=p7->d.signed_and_enveloped->recipientinfo;
294                 md_sk=p7->d.signed_and_enveloped->md_algs;
295                 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
296                 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
297                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
298                 if (evp_cipher == NULL)
299                         {
300                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
301                         goto err;
302                         }
303                 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
304                 break;
305         case NID_pkcs7_enveloped:
306                 rsk=p7->d.enveloped->recipientinfo;
307                 enc_alg=p7->d.enveloped->enc_data->algorithm;
308                 data_body=p7->d.enveloped->enc_data->enc_data;
309                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
310                 if (evp_cipher == NULL)
311                         {
312                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
313                         goto err;
314                         }
315                 xalg=p7->d.enveloped->enc_data->algorithm;
316                 break;
317         default:
318                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
319                 goto err;
320                 }
321
322         /* We will be checking the signature */
323         if (md_sk != NULL)
324                 {
325                 for (i=0; i<sk_num(md_sk); i++)
326                         {
327                         xa=(X509_ALGOR *)sk_value(md_sk,i);
328                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
329                                 {
330                                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
331                                 goto err;
332                                 }
333
334                         j=OBJ_obj2nid(xa->algorithm);
335                         evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
336                         if (evp_md == NULL)
337                                 {
338                                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
339                                 goto err;
340                                 }
341
342                         BIO_set_md(btmp,evp_md);
343                         if (out == NULL)
344                                 out=btmp;
345                         else
346                                 BIO_push(out,btmp);
347                         btmp=NULL;
348                         }
349                 }
350
351         if (evp_cipher != NULL)
352                 {
353 #if 0
354                 unsigned char key[EVP_MAX_KEY_LENGTH];
355                 unsigned char iv[EVP_MAX_IV_LENGTH];
356                 unsigned char *p;
357                 int keylen,ivlen;
358                 int max;
359                 X509_OBJECT ret;
360 #endif
361                 int jj;
362
363                 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
364                         {
365                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
366                         goto err;
367                         }
368
369                 /* It was encrypted, we need to decrypt the secret key
370                  * with the private key */
371
372                 /* We need to find a private key for one of the people in the
373                  * recipentinfo list */
374                 if (rsk == NULL)
375                         return(NULL);
376
377                 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
378 #if 0
379                 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
380                 for (i=0; i<sk_num(rsk); i++)
381                         {
382                         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
383                         uf (X509_STORE_get_by_issuer_serial(&s_ctx,
384                                 X509_LU_PKEY,
385                                 ri->issuer_and_serial->issuer,
386                                 ri->issuer_and_serial->serial,
387                                 &ret))
388                                 break;
389                         ri=NULL;
390                         }
391                 if (ri == NULL) return(NULL);   
392                 pkey=ret.data.pkey;
393 #endif
394                 if (pkey == NULL)
395                         {
396                         return(NULL);
397                         }
398
399                 jj=EVP_PKEY_size(pkey);
400                 tmp=Malloc(jj+10);
401                 if (tmp == NULL)
402                         {
403                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
404                         goto err;
405                         }
406
407                 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
408                         ASN1_STRING_data(ri->enc_key),
409                         ASN1_STRING_length(ri->enc_key),
410                         pkey);
411                 if (jj <= 0)
412                         {
413                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
414                         goto err;
415                         }
416
417                 evp_ctx=NULL;
418                 BIO_get_cipher_ctx(etmp,&evp_ctx);
419                 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
420                 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
421                         return(NULL);
422
423                 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
424                         {
425                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
426                         goto err;
427                         }
428                 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
429
430                 memset(tmp,0,jj);
431
432                 if (out == NULL)
433                         out=etmp;
434                 else
435                         BIO_push(out,etmp);
436                 etmp=NULL;
437                 }
438
439 #if 1
440         if (p7->detached || (in_bio != NULL))
441                 {
442                 bio=in_bio;
443                 }
444         else 
445                 {
446                 bio=BIO_new(BIO_s_mem());
447                 /* We need to set this so that when we have read all
448                  * the data, the encrypt BIO, if present, will read
449                  * EOF and encode the last few bytes */
450                 BIO_set_mem_eof_return(bio,0);
451
452                 if (data_body->length > 0)
453                         BIO_write(bio,(char *)data_body->data,data_body->length);
454                 }
455         BIO_push(out,bio);
456         bio=NULL;
457 #endif
458         if (0)
459                 {
460 err:
461                 if (out != NULL) BIO_free_all(out);
462                 if (btmp != NULL) BIO_free_all(btmp);
463                 if (etmp != NULL) BIO_free_all(etmp);
464                 if (bio != NULL) BIO_free_all(bio);
465                 out=NULL;
466                 }
467         if (tmp != NULL)
468                 Free(tmp);
469         return(out);
470         }
471 #endif
472
473 int PKCS7_dataFinal(p7,bio)
474 PKCS7 *p7;
475 BIO *bio;
476         {
477         int ret=0;
478         int i,j;
479         BIO *btmp;
480         BUF_MEM *buf_mem=NULL;
481         BUF_MEM *buf=NULL;
482         PKCS7_SIGNER_INFO *si;
483         EVP_MD_CTX *mdc,ctx_tmp;
484         STACK *sk,*si_sk=NULL;
485         unsigned char *p,*pp=NULL;
486         int x;
487         ASN1_OCTET_STRING *os=NULL;
488
489         i=OBJ_obj2nid(p7->type);
490         p7->state=PKCS7_S_HEADER;
491
492         switch (i)
493                 {
494         case NID_pkcs7_signedAndEnveloped:
495                 /* XXXXXXXXXXXXXXXX */
496                 si_sk=p7->d.signed_and_enveloped->signer_info;
497                 os=ASN1_OCTET_STRING_new();
498                 p7->d.signed_and_enveloped->enc_data->enc_data=os;
499                 break;
500         case NID_pkcs7_enveloped:
501                 /* XXXXXXXXXXXXXXXX */
502                 os=ASN1_OCTET_STRING_new();
503                 p7->d.enveloped->enc_data->enc_data=os;
504                 break;
505         case NID_pkcs7_signed:
506                 si_sk=p7->d.sign->signer_info;
507                 os=p7->d.sign->contents->d.data;
508                 /* If detached data then the content is excluded */
509                 if(p7->detached) {
510                         ASN1_OCTET_STRING_free(os);
511                         p7->d.sign->contents->d.data = NULL;
512                 }
513                 break;
514                 }
515
516         if (si_sk != NULL)
517                 {
518                 if ((buf=BUF_MEM_new()) == NULL)
519                         {
520                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
521                         goto err;
522                         }
523                 for (i=0; i<sk_num(si_sk); i++)
524                         {
525                         si=(PKCS7_SIGNER_INFO *)
526                                 sk_value(si_sk,i);
527                         if (si->pkey == NULL) continue;
528
529                         j=OBJ_obj2nid(si->digest_alg->algorithm);
530
531                         btmp=bio;
532                         for (;;)
533                                 {
534                                 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) 
535                                         == NULL)
536                                         {
537                                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
538                                         goto err;
539                                         }
540                                 BIO_get_md_ctx(btmp,&mdc);
541                                 if (mdc == NULL)
542                                         {
543                                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
544                                         goto err;
545                                         }
546                                 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
547                                         break;
548                                 else
549                                         btmp=btmp->next_bio;
550                                 }
551                         
552                         /* We now have the EVP_MD_CTX, lets do the
553                          * signing. */
554                         memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
555                         if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
556                                 {
557                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
558                                 goto err;
559                                 }
560
561                         sk=si->auth_attr;
562
563                         /* If there are attributes, we add the digest
564                          * attribute and only sign the attributes */
565                         if ((sk != NULL) && (sk_num(sk) != 0))
566                                 {
567                                 unsigned char md_data[EVP_MAX_MD_SIZE];
568                                 unsigned int md_len;
569                                 ASN1_OCTET_STRING *digest;
570                                 ASN1_UTCTIME *sign_time;
571                                 EVP_MD *md_tmp;
572
573                                 /* Add signing time */
574                                 sign_time=X509_gmtime_adj(NULL,0);
575                                 PKCS7_add_signed_attribute(si,
576                                         NID_pkcs9_signingTime,
577                                         V_ASN1_UTCTIME,(char *)sign_time);
578
579                                 /* Add digest */
580                                 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
581                                 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
582                                 digest=ASN1_OCTET_STRING_new();
583                                 ASN1_OCTET_STRING_set(digest,md_data,md_len);
584                                 PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
585                                         V_ASN1_OCTET_STRING,(char *)digest);
586
587                                 /* Now sign the mess */
588                                 EVP_SignInit(&ctx_tmp,md_tmp);
589                                 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
590                                         V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
591                                 pp=(unsigned char *)Malloc(x);
592                                 p=pp;
593                                 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
594                                         V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
595                                 EVP_SignUpdate(&ctx_tmp,pp,x);
596                                 Free(pp);
597                                 pp=NULL;
598                                 }
599
600                         if (si->pkey->type == EVP_PKEY_DSA)
601                                 ctx_tmp.digest=EVP_dss1();
602
603                         if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
604                                 (unsigned int *)&buf->length,si->pkey))
605                                 {
606                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
607                                 goto err;
608                                 }
609                         if (!ASN1_STRING_set(si->enc_digest,
610                                 (unsigned char *)buf->data,buf->length))
611                                 {
612                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
613                                 goto err;
614                                 }
615                         }
616                 }
617
618         if (!p7->detached)
619                 {
620                 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
621                 if (btmp == NULL)
622                         {
623                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
624                         goto err;
625                         }
626                 BIO_get_mem_ptr(btmp,&buf_mem);
627                 ASN1_OCTET_STRING_set(os,
628                         (unsigned char *)buf_mem->data,buf_mem->length);
629                 }
630         if (pp != NULL) Free(pp);
631         pp=NULL;
632
633         ret=1;
634 err:
635         if (buf != NULL) BUF_MEM_free(buf);
636         return(ret);
637         }
638
639 int PKCS7_dataVerify(cert_store,ctx,bio,p7,si)
640 X509_STORE *cert_store;
641 X509_STORE_CTX *ctx;
642 BIO *bio;
643 PKCS7 *p7;
644 PKCS7_SIGNER_INFO *si;
645         {
646 /*      PKCS7_SIGNED *s; */
647         ASN1_OCTET_STRING *os;
648         EVP_MD_CTX mdc_tmp,*mdc;
649         unsigned char *pp,*p;
650         PKCS7_ISSUER_AND_SERIAL *ias;
651         int ret=0,i;
652         int md_type;
653         STACK *sk,*cert;
654         BIO *btmp;
655         X509 *x509;
656         EVP_PKEY *pkey;
657
658         if (PKCS7_type_is_signed(p7))
659                 {
660                 cert=p7->d.sign->cert;
661                 }
662         else if (PKCS7_type_is_signedAndEnveloped(p7))
663                 {
664                 cert=p7->d.signed_and_enveloped->cert;
665                 }
666         else
667                 {
668                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
669                 goto err;
670                 }
671         /* XXXXXXXXXXXXXXXXXXXXXXX */
672         ias=si->issuer_and_serial;
673
674         x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
675
676         /* were we able to find the cert in passed to us */
677         if (x509 == NULL)
678                 {
679                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
680                 goto err;
681                 }
682
683         /* Lets verify */
684         X509_STORE_CTX_init(ctx,cert_store,x509,cert);
685         i=X509_verify_cert(ctx);
686         if (i <= 0) 
687                 {
688                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
689                 goto err;
690                 }
691         X509_STORE_CTX_cleanup(ctx);
692
693         /* So we like 'x509', lets check the signature. */
694         md_type=OBJ_obj2nid(si->digest_alg->algorithm);
695
696         btmp=bio;
697         for (;;)
698                 {
699                 if ((btmp == NULL) ||
700                         ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
701                         {
702                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
703                         goto err;
704                         }
705                 BIO_get_md_ctx(btmp,&mdc);
706                 if (mdc == NULL)
707                         {
708                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
709                         goto err;
710                         }
711                 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
712                         break;
713                 btmp=btmp->next_bio;    
714                 }
715
716         /* mdc is the digest ctx that we want, unless there are attributes,
717          * in which case the digest is the signed attributes */
718         memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
719
720         sk=si->auth_attr;
721         if ((sk != NULL) && (sk_num(sk) != 0))
722                 {
723                 unsigned char md_dat[EVP_MAX_MD_SIZE];
724                 unsigned int md_len;
725                 ASN1_OCTET_STRING *message_digest;
726
727                 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
728                 message_digest=PKCS7_digest_from_attributes(sk);
729                 if (!message_digest)
730                         {
731                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
732                         goto err;
733                         }
734                 if ((message_digest->length != (int)md_len) ||
735                         (memcmp(message_digest->data,md_dat,md_len)))
736                         {
737 #if 0
738 {
739 int ii;
740 for (ii=0; ii<message_digest->length; ii++)
741         printf("%02X",message_digest->data[ii]); printf(" sent\n");
742 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
743 }
744 #endif
745                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
746                         ret= -1;
747                         goto err;
748                         }
749
750                 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
751                 /* Note: when forming the encoding of the attributes we
752                  * shouldn't reorder them or this will break the signature.
753                  * This is done by using the IS_SEQUENCE flag.
754                  */
755                 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
756                         V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
757                 pp=(unsigned char *)Malloc(i);
758                 p=pp;
759                 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
760                         V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
761                 EVP_VerifyUpdate(&mdc_tmp,pp,i);
762
763                 Free(pp);
764                 }
765
766         os=si->enc_digest;
767         pkey = X509_get_pubkey(x509);
768         if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
769
770         i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
771         EVP_PKEY_free(pkey);
772         if (i <= 0)
773                 {
774                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
775                 ret= -1;
776                 goto err;
777                 }
778         else
779                 ret=1;
780 err:
781         return(ret);
782         }
783
784 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(p7,idx)
785 PKCS7 *p7;
786 int idx;
787         {
788         STACK *rsk;
789         PKCS7_RECIP_INFO *ri;
790         int i;
791
792         i=OBJ_obj2nid(p7->type);
793         if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
794         rsk=p7->d.signed_and_enveloped->recipientinfo;
795         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
796         if (sk_num(rsk) <= idx) return(NULL);
797         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
798         return(ri->issuer_and_serial);
799         }
800
801 ASN1_TYPE *PKCS7_get_signed_attribute(si,nid)
802 PKCS7_SIGNER_INFO *si;
803 int nid;
804         {
805         return(get_attribute(si->auth_attr,nid));
806         }
807
808 ASN1_TYPE *PKCS7_get_attribute(si,nid)
809 PKCS7_SIGNER_INFO *si;
810 int nid;
811         {
812         return(get_attribute(si->unauth_attr,nid));
813         }
814
815 static ASN1_TYPE *get_attribute(sk,nid)
816 STACK *sk;
817 int nid;
818         {
819         int i;
820         X509_ATTRIBUTE *xa;
821         ASN1_OBJECT *o;
822
823         o=OBJ_nid2obj(nid);
824         if (o == NULL) return(NULL);
825         for (i=0; i<sk_num(sk); i++)
826                 {
827                 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
828                 if (OBJ_cmp(xa->object,o) == 0)
829                         {
830                         if (xa->set && sk_num(xa->value.set))
831                                 return((ASN1_TYPE *)sk_value(xa->value.set,0));
832                         else
833                                 return(NULL);
834                         }
835                 }
836         return(NULL);
837         }
838
839 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(sk)
840 STACK *sk;
841         {
842         X509_ATTRIBUTE *attr;
843         ASN1_TYPE *astype;
844         int i;
845         if (!sk || !sk_num(sk)) return NULL;
846         /* Search the attributes for a digest */
847         for (i = 0; i < sk_num(sk); i++)
848                 {
849                 attr = (X509_ATTRIBUTE *) sk_value(sk, i);
850                 if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest)
851                         {
852                         if (!attr->set) return NULL;
853                         if (!attr->value.set ||
854                                  !sk_num (attr->value.set) ) return NULL;
855                         astype = (ASN1_TYPE *) sk_value(attr->value.set, 0);
856                         return astype->value.octet_string;
857                         }
858                 }
859         return NULL;
860         }
861
862 int PKCS7_set_signed_attributes(p7si,sk)
863 PKCS7_SIGNER_INFO *p7si;
864 STACK *sk;
865         {
866         int i;
867
868         if (p7si->auth_attr != NULL)
869                 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
870         p7si->auth_attr=sk_dup(sk);
871         for (i=0; i<sk_num(sk); i++)
872                 {
873                 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
874                         (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
875                         return(0);
876                 }
877         return(1);
878         }
879
880 int PKCS7_set_attributes(p7si,sk)
881 PKCS7_SIGNER_INFO *p7si;
882 STACK *sk;
883         {
884         int i;
885
886         if (p7si->unauth_attr != NULL)
887                 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
888         p7si->unauth_attr=sk_dup(sk);
889         for (i=0; i<sk_num(sk); i++)
890                 {
891                 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
892                         (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
893                         return(0);
894                 }
895         return(1);
896         }
897
898 int PKCS7_add_signed_attribute(p7si,nid,atrtype,value)
899 PKCS7_SIGNER_INFO *p7si;
900 int nid;
901 int atrtype;
902 char *value;
903         {
904         return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
905         }
906
907 int PKCS7_add_attribute(p7si,nid,atrtype,value)
908 PKCS7_SIGNER_INFO *p7si;
909 int nid;
910 int atrtype;
911 char *value;
912         {
913         return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
914         }
915
916 static int add_attribute(sk, nid, atrtype, value)
917 STACK **sk;
918 int nid;
919 int atrtype;
920 char *value;
921         {
922         X509_ATTRIBUTE *attr=NULL;
923
924         if (*sk == NULL)
925                 {
926                 *sk = sk_new(NULL);
927 new_attrib:
928                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
929                 sk_push(*sk,(char *)attr);
930                 }
931         else
932                 {
933                 int i;
934
935                 for (i=0; i<sk_num(*sk); i++)
936                         {
937                         attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
938                         if (OBJ_obj2nid(attr->object) == nid)
939                                 {
940                                 X509_ATTRIBUTE_free(attr);
941                                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
942                                 sk_value(*sk,i)=(char *)attr;
943                                 goto end;
944                                 }
945                         }
946                 goto new_attrib;
947                 }
948 end:
949         return(1);
950         }
951