Really fix PKCS7_set_detached this time...
[openssl.git] / crypto / pkcs7 / pk7_lib.c
1 /* crypto/pkcs7/pk7_lib.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/objects.h>
62 #include <openssl/x509.h>
63
64 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
65         {
66         int nid;
67         long ret;
68
69         nid=OBJ_obj2nid(p7->type);
70
71         switch (cmd)
72                 {
73         case PKCS7_OP_SET_DETACHED_SIGNATURE:
74                 if (nid == NID_pkcs7_signed)
75                         {
76                         ret=p7->detached=(int)larg;
77                         if (ret && PKCS7_type_is_data(p7->d.sign->contents))
78                                         {
79                                         ASN1_OCTET_STRING *os;
80                                         os=p7->d.sign->contents->d.data;
81                                         ASN1_OCTET_STRING_free(os);
82                                         p7->d.sign->contents->d.data = NULL;
83                                         }
84                         }
85                 else
86                         {
87                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
88                         ret=0;
89                         }
90                 break;
91         case PKCS7_OP_GET_DETACHED_SIGNATURE:
92                 if (nid == NID_pkcs7_signed)
93                         {
94                         if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)
95                                 ret = 1;
96                         else ret = 0;
97                                 
98                         p7->detached = ret;
99                         }
100                 else
101                         {
102                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
103                         ret=0;
104                         }
105                         
106                 break;
107         default:
108                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
109                 ret=0;
110                 }
111         return(ret);
112         }
113
114 int PKCS7_content_new(PKCS7 *p7, int type)
115         {
116         PKCS7 *ret=NULL;
117
118         if ((ret=PKCS7_new()) == NULL) goto err;
119         if (!PKCS7_set_type(ret,type)) goto err;
120         if (!PKCS7_set_content(p7,ret)) goto err;
121
122         return(1);
123 err:
124         if (ret != NULL) PKCS7_free(ret);
125         return(0);
126         }
127
128 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
129         {
130         int i;
131
132         i=OBJ_obj2nid(p7->type);
133         switch (i)
134                 {
135         case NID_pkcs7_signed:
136                 if (p7->d.sign->contents != NULL)
137                         PKCS7_free(p7->d.sign->contents);
138                 p7->d.sign->contents=p7_data;
139                 break;
140         case NID_pkcs7_digest:
141         case NID_pkcs7_data:
142         case NID_pkcs7_enveloped:
143         case NID_pkcs7_signedAndEnveloped:
144         case NID_pkcs7_encrypted:
145         default:
146                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
147                 goto err;
148                 }
149         return(1);
150 err:
151         return(0);
152         }
153
154 int PKCS7_set_type(PKCS7 *p7, int type)
155         {
156         ASN1_OBJECT *obj;
157
158         /*PKCS7_content_free(p7);*/
159         obj=OBJ_nid2obj(type); /* will not fail */
160
161         switch (type)
162                 {
163         case NID_pkcs7_signed:
164                 p7->type=obj;
165                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
166                         goto err;
167                 ASN1_INTEGER_set(p7->d.sign->version,1);
168                 break;
169         case NID_pkcs7_data:
170                 p7->type=obj;
171                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
172                         goto err;
173                 break;
174         case NID_pkcs7_signedAndEnveloped:
175                 p7->type=obj;
176                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
177                         == NULL) goto err;
178                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
179                 p7->d.signed_and_enveloped->enc_data->content_type
180                                                 = OBJ_nid2obj(NID_pkcs7_data);
181                 break;
182         case NID_pkcs7_enveloped:
183                 p7->type=obj;
184                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
185                         == NULL) goto err;
186                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
187                 p7->d.enveloped->enc_data->content_type
188                                                 = OBJ_nid2obj(NID_pkcs7_data);
189                 break;
190         case NID_pkcs7_encrypted:
191                 p7->type=obj;
192                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
193                         == NULL) goto err;
194                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
195                 p7->d.encrypted->enc_data->content_type
196                                                 = OBJ_nid2obj(NID_pkcs7_data);
197                 break;
198
199         case NID_pkcs7_digest:
200         default:
201                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
202                 goto err;
203                 }
204         return(1);
205 err:
206         return(0);
207         }
208
209 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
210         {
211         int i,j,nid;
212         X509_ALGOR *alg;
213         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
214         STACK_OF(X509_ALGOR) *md_sk;
215
216         i=OBJ_obj2nid(p7->type);
217         switch (i)
218                 {
219         case NID_pkcs7_signed:
220                 signer_sk=      p7->d.sign->signer_info;
221                 md_sk=          p7->d.sign->md_algs;
222                 break;
223         case NID_pkcs7_signedAndEnveloped:
224                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
225                 md_sk=          p7->d.signed_and_enveloped->md_algs;
226                 break;
227         default:
228                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
229                 return(0);
230                 }
231
232         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
233
234         /* If the digest is not currently listed, add it */
235         j=0;
236         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
237                 {
238                 alg=sk_X509_ALGOR_value(md_sk,i);
239                 if (OBJ_obj2nid(alg->algorithm) == nid)
240                         {
241                         j=1;
242                         break;
243                         }
244                 }
245         if (!j) /* we need to add another algorithm */
246                 {
247                 if(!(alg=X509_ALGOR_new())
248                         || !(alg->parameter = ASN1_TYPE_new())) {
249                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
250                         return(0);
251                 }
252                 alg->algorithm=OBJ_nid2obj(nid);
253                 alg->parameter->type = V_ASN1_NULL;
254                 sk_X509_ALGOR_push(md_sk,alg);
255                 }
256
257         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
258         return(1);
259         }
260
261 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
262         {
263         int i;
264         STACK_OF(X509) **sk;
265
266         i=OBJ_obj2nid(p7->type);
267         switch (i)
268                 {
269         case NID_pkcs7_signed:
270                 sk= &(p7->d.sign->cert);
271                 break;
272         case NID_pkcs7_signedAndEnveloped:
273                 sk= &(p7->d.signed_and_enveloped->cert);
274                 break;
275         default:
276                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
277                 return(0);
278                 }
279
280         if (*sk == NULL)
281                 *sk=sk_X509_new_null();
282         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
283         sk_X509_push(*sk,x509);
284         return(1);
285         }
286
287 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
288         {
289         int i;
290         STACK_OF(X509_CRL) **sk;
291
292         i=OBJ_obj2nid(p7->type);
293         switch (i)
294                 {
295         case NID_pkcs7_signed:
296                 sk= &(p7->d.sign->crl);
297                 break;
298         case NID_pkcs7_signedAndEnveloped:
299                 sk= &(p7->d.signed_and_enveloped->crl);
300                 break;
301         default:
302                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
303                 return(0);
304                 }
305
306         if (*sk == NULL)
307                 *sk=sk_X509_CRL_new_null();
308
309         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
310         sk_X509_CRL_push(*sk,crl);
311         return(1);
312         }
313
314 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
315              const EVP_MD *dgst)
316         {
317         int nid;
318         char is_dsa;
319
320         if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
321                 is_dsa = 1;
322         else
323                 is_dsa = 0;
324         /* We now need to add another PKCS7_SIGNER_INFO entry */
325         ASN1_INTEGER_set(p7i->version,1);
326         X509_NAME_set(&p7i->issuer_and_serial->issuer,
327                 X509_get_issuer_name(x509));
328
329         /* because ASN1_INTEGER_set is used to set a 'long' we will do
330          * things the ugly way. */
331         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
332         p7i->issuer_and_serial->serial=
333                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
334
335         /* lets keep the pkey around for a while */
336         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
337         p7i->pkey=pkey;
338
339         /* Set the algorithms */
340         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
341         else    
342                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
343
344         if (p7i->digest_alg->parameter != NULL)
345                 ASN1_TYPE_free(p7i->digest_alg->parameter);
346         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
347                 goto err;
348         p7i->digest_alg->parameter->type=V_ASN1_NULL;
349
350         if (p7i->digest_enc_alg->parameter != NULL)
351                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
352         nid = EVP_PKEY_type(pkey->type);
353         if (nid == EVP_PKEY_RSA)
354                 {
355                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
356                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
357                         goto err;
358                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
359                 }
360         else if (nid == EVP_PKEY_DSA)
361                 {
362 #if 1
363                 /* use 'dsaEncryption' OID for compatibility with other software
364                  * (PKCS #7 v1.5 does specify how to handle DSA) ... */
365                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
366 #else
367                 /* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
368                  * would make more sense. */
369                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
370 #endif
371                 p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
372                 }
373         else if (nid == EVP_PKEY_EC)
374                 {
375                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
376                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
377                         goto err;
378                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
379                 }
380         else
381                 return(0);
382
383         return(1);
384 err:
385         return(0);
386         }
387
388 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
389              const EVP_MD *dgst)
390         {
391         PKCS7_SIGNER_INFO *si;
392
393         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
394         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
395         if (!PKCS7_add_signer(p7,si)) goto err;
396         return(si);
397 err:
398         return(NULL);
399         }
400
401 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
402         {
403         if (PKCS7_type_is_signed(p7))
404                 {
405                 return(p7->d.sign->signer_info);
406                 }
407         else if (PKCS7_type_is_signedAndEnveloped(p7))
408                 {
409                 return(p7->d.signed_and_enveloped->signer_info);
410                 }
411         else
412                 return(NULL);
413         }
414
415 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
416         {
417         PKCS7_RECIP_INFO *ri;
418
419         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
420         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
421         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
422         return(ri);
423 err:
424         return(NULL);
425         }
426
427 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
428         {
429         int i;
430         STACK_OF(PKCS7_RECIP_INFO) *sk;
431
432         i=OBJ_obj2nid(p7->type);
433         switch (i)
434                 {
435         case NID_pkcs7_signedAndEnveloped:
436                 sk=     p7->d.signed_and_enveloped->recipientinfo;
437                 break;
438         case NID_pkcs7_enveloped:
439                 sk=     p7->d.enveloped->recipientinfo;
440                 break;
441         default:
442                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
443                 return(0);
444                 }
445
446         sk_PKCS7_RECIP_INFO_push(sk,ri);
447         return(1);
448         }
449
450 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
451         {
452         ASN1_INTEGER_set(p7i->version,0);
453         X509_NAME_set(&p7i->issuer_and_serial->issuer,
454                 X509_get_issuer_name(x509));
455
456         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
457         p7i->issuer_and_serial->serial=
458                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
459
460         X509_ALGOR_free(p7i->key_enc_algor);
461         p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor);
462
463         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
464         p7i->cert=x509;
465
466         return(1);
467         }
468
469 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
470         {
471         if (PKCS7_type_is_signed(p7))
472                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
473                         si->issuer_and_serial->issuer,
474                         si->issuer_and_serial->serial));
475         else
476                 return(NULL);
477         }
478
479 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
480         {
481         int i;
482         ASN1_OBJECT *objtmp;
483         PKCS7_ENC_CONTENT *ec;
484
485         i=OBJ_obj2nid(p7->type);
486         switch (i)
487                 {
488         case NID_pkcs7_signedAndEnveloped:
489                 ec=p7->d.signed_and_enveloped->enc_data;
490                 break;
491         case NID_pkcs7_enveloped:
492                 ec=p7->d.enveloped->enc_data;
493                 break;
494         default:
495                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
496                 return(0);
497                 }
498
499         /* Check cipher OID exists and has data in it*/
500         i = EVP_CIPHER_type(cipher);
501         if(i == NID_undef) {
502                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
503                 return(0);
504         }
505         objtmp = OBJ_nid2obj(i);
506
507         ec->cipher = cipher;
508         return 1;
509         }
510