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
PKCS7_ctrl(PKCS7 * p7,int cmd,long larg,char * parg)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
PKCS7_content_new(PKCS7 * p7,int type)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
PKCS7_set_content(PKCS7 * p7,PKCS7 * p7_data)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
PKCS7_set_type(PKCS7 * p7,int type)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 if (!ASN1_INTEGER_set(p7->d.sign->version,1))
168 {
169 PKCS7_SIGNED_free(p7->d.sign);
170 p7->d.sign=NULL;
171 goto err;
172 }
173 break;
174 case NID_pkcs7_data:
175 p7->type=obj;
176 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
177 goto err;
178 break;
179 case NID_pkcs7_signedAndEnveloped:
180 p7->type=obj;
181 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
182 == NULL) goto err;
183 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
184 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))
185 goto err;
186 p7->d.signed_and_enveloped->enc_data->content_type
187 = OBJ_nid2obj(NID_pkcs7_data);
188 break;
189 case NID_pkcs7_enveloped:
190 p7->type=obj;
191 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
192 == NULL) goto err;
193 if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
194 goto err;
195 p7->d.enveloped->enc_data->content_type
196 = OBJ_nid2obj(NID_pkcs7_data);
197 break;
198 case NID_pkcs7_encrypted:
199 p7->type=obj;
200 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
201 == NULL) goto err;
202 if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
203 goto err;
204 p7->d.encrypted->enc_data->content_type
205 = OBJ_nid2obj(NID_pkcs7_data);
206 break;
207
208 case NID_pkcs7_digest:
209 default:
210 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
211 goto err;
212 }
213 return(1);
214 err:
215 return(0);
216 }
217
PKCS7_add_signer(PKCS7 * p7,PKCS7_SIGNER_INFO * psi)218 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
219 {
220 int i,j,nid;
221 X509_ALGOR *alg;
222 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
223 STACK_OF(X509_ALGOR) *md_sk;
224
225 i=OBJ_obj2nid(p7->type);
226 switch (i)
227 {
228 case NID_pkcs7_signed:
229 signer_sk= p7->d.sign->signer_info;
230 md_sk= p7->d.sign->md_algs;
231 break;
232 case NID_pkcs7_signedAndEnveloped:
233 signer_sk= p7->d.signed_and_enveloped->signer_info;
234 md_sk= p7->d.signed_and_enveloped->md_algs;
235 break;
236 default:
237 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
238 return(0);
239 }
240
241 nid=OBJ_obj2nid(psi->digest_alg->algorithm);
242
243 /* If the digest is not currently listed, add it */
244 j=0;
245 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
246 {
247 alg=sk_X509_ALGOR_value(md_sk,i);
248 if (OBJ_obj2nid(alg->algorithm) == nid)
249 {
250 j=1;
251 break;
252 }
253 }
254 if (!j) /* we need to add another algorithm */
255 {
256 if(!(alg=X509_ALGOR_new())
257 || !(alg->parameter = ASN1_TYPE_new())) {
258 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
259 return(0);
260 }
261 alg->algorithm=OBJ_nid2obj(nid);
262 alg->parameter->type = V_ASN1_NULL;
263 sk_X509_ALGOR_push(md_sk,alg);
264 }
265
266 sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
267 return(1);
268 }
269
PKCS7_add_certificate(PKCS7 * p7,X509 * x509)270 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
271 {
272 int i;
273 STACK_OF(X509) **sk;
274
275 i=OBJ_obj2nid(p7->type);
276 switch (i)
277 {
278 case NID_pkcs7_signed:
279 sk= &(p7->d.sign->cert);
280 break;
281 case NID_pkcs7_signedAndEnveloped:
282 sk= &(p7->d.signed_and_enveloped->cert);
283 break;
284 default:
285 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
286 return(0);
287 }
288
289 if (*sk == NULL)
290 *sk=sk_X509_new_null();
291 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
292 sk_X509_push(*sk,x509);
293 return(1);
294 }
295
PKCS7_add_crl(PKCS7 * p7,X509_CRL * crl)296 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
297 {
298 int i;
299 STACK_OF(X509_CRL) **sk;
300
301 i=OBJ_obj2nid(p7->type);
302 switch (i)
303 {
304 case NID_pkcs7_signed:
305 sk= &(p7->d.sign->crl);
306 break;
307 case NID_pkcs7_signedAndEnveloped:
308 sk= &(p7->d.signed_and_enveloped->crl);
309 break;
310 default:
311 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
312 return(0);
313 }
314
315 if (*sk == NULL)
316 *sk=sk_X509_CRL_new_null();
317
318 CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
319 sk_X509_CRL_push(*sk,crl);
320 return(1);
321 }
322
PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO * p7i,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)323 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
324 const EVP_MD *dgst)
325 {
326 char is_dsa;
327 if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
328 else is_dsa = 0;
329 /* We now need to add another PKCS7_SIGNER_INFO entry */
330 if (!ASN1_INTEGER_set(p7i->version,1))
331 goto err;
332 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
333 X509_get_issuer_name(x509)))
334 goto err;
335
336 /* because ASN1_INTEGER_set is used to set a 'long' we will do
337 * things the ugly way. */
338 M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
339 if (!(p7i->issuer_and_serial->serial=
340 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
341 goto err;
342
343 /* lets keep the pkey around for a while */
344 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
345 p7i->pkey=pkey;
346
347 /* Set the algorithms */
348 if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
349 else
350 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
351
352 if (p7i->digest_alg->parameter != NULL)
353 ASN1_TYPE_free(p7i->digest_alg->parameter);
354 if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
355 goto err;
356 p7i->digest_alg->parameter->type=V_ASN1_NULL;
357
358 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
359
360 if (p7i->digest_enc_alg->parameter != NULL)
361 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
362 if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
363 else {
364 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
365 goto err;
366 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
367 }
368
369 return(1);
370 err:
371 return(0);
372 }
373
PKCS7_add_signature(PKCS7 * p7,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)374 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
375 const EVP_MD *dgst)
376 {
377 PKCS7_SIGNER_INFO *si;
378
379 if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
380 if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
381 if (!PKCS7_add_signer(p7,si)) goto err;
382 return(si);
383 err:
384 return(NULL);
385 }
386
STACK_OF(PKCS7_SIGNER_INFO)387 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
388 {
389 if (PKCS7_type_is_signed(p7))
390 {
391 return(p7->d.sign->signer_info);
392 }
393 else if (PKCS7_type_is_signedAndEnveloped(p7))
394 {
395 return(p7->d.signed_and_enveloped->signer_info);
396 }
397 else
398 return(NULL);
399 }
400
PKCS7_add_recipient(PKCS7 * p7,X509 * x509)401 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
402 {
403 PKCS7_RECIP_INFO *ri;
404
405 if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
406 if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
407 if (!PKCS7_add_recipient_info(p7,ri)) goto err;
408 return(ri);
409 err:
410 return(NULL);
411 }
412
PKCS7_add_recipient_info(PKCS7 * p7,PKCS7_RECIP_INFO * ri)413 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
414 {
415 int i;
416 STACK_OF(PKCS7_RECIP_INFO) *sk;
417
418 i=OBJ_obj2nid(p7->type);
419 switch (i)
420 {
421 case NID_pkcs7_signedAndEnveloped:
422 sk= p7->d.signed_and_enveloped->recipientinfo;
423 break;
424 case NID_pkcs7_enveloped:
425 sk= p7->d.enveloped->recipientinfo;
426 break;
427 default:
428 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
429 return(0);
430 }
431
432 sk_PKCS7_RECIP_INFO_push(sk,ri);
433 return(1);
434 }
435
PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO * p7i,X509 * x509)436 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
437 {
438 if (!ASN1_INTEGER_set(p7i->version,0))
439 return 0;
440 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
441 X509_get_issuer_name(x509)))
442 return 0;
443
444 M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
445 if (!(p7i->issuer_and_serial->serial=
446 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
447 return 0;
448
449 X509_ALGOR_free(p7i->key_enc_algor);
450 if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
451 return 0;
452
453 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
454 p7i->cert=x509;
455
456 return(1);
457 }
458
PKCS7_cert_from_signer_info(PKCS7 * p7,PKCS7_SIGNER_INFO * si)459 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
460 {
461 if (PKCS7_type_is_signed(p7))
462 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
463 si->issuer_and_serial->issuer,
464 si->issuer_and_serial->serial));
465 else
466 return(NULL);
467 }
468
PKCS7_set_cipher(PKCS7 * p7,const EVP_CIPHER * cipher)469 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
470 {
471 int i;
472 ASN1_OBJECT *objtmp;
473 PKCS7_ENC_CONTENT *ec;
474
475 i=OBJ_obj2nid(p7->type);
476 switch (i)
477 {
478 case NID_pkcs7_signedAndEnveloped:
479 ec=p7->d.signed_and_enveloped->enc_data;
480 break;
481 case NID_pkcs7_enveloped:
482 ec=p7->d.enveloped->enc_data;
483 break;
484 default:
485 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
486 return(0);
487 }
488
489 /* Check cipher OID exists and has data in it*/
490 i = EVP_CIPHER_type(cipher);
491 if(i == NID_undef) {
492 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
493 return(0);
494 }
495 objtmp = OBJ_nid2obj(i);
496
497 ec->cipher = cipher;
498 return 1;
499 }
500
501