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
64long 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
114int 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);
123err:
124	if (ret != NULL) PKCS7_free(ret);
125	return(0);
126	}
127
128int 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		if (p7->d.digest->contents != NULL)
142			PKCS7_free(p7->d.digest->contents);
143		p7->d.digest->contents=p7_data;
144		break;
145	case NID_pkcs7_data:
146	case NID_pkcs7_enveloped:
147	case NID_pkcs7_signedAndEnveloped:
148	case NID_pkcs7_encrypted:
149	default:
150		PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
151		goto err;
152		}
153	return(1);
154err:
155	return(0);
156	}
157
158int PKCS7_set_type(PKCS7 *p7, int type)
159	{
160	ASN1_OBJECT *obj;
161
162	/*PKCS7_content_free(p7);*/
163	obj=OBJ_nid2obj(type); /* will not fail */
164
165	switch (type)
166		{
167	case NID_pkcs7_signed:
168		p7->type=obj;
169		if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
170			goto err;
171		if (!ASN1_INTEGER_set(p7->d.sign->version,1))
172			{
173			PKCS7_SIGNED_free(p7->d.sign);
174			p7->d.sign=NULL;
175			goto err;
176			}
177		break;
178	case NID_pkcs7_data:
179		p7->type=obj;
180		if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
181			goto err;
182		break;
183	case NID_pkcs7_signedAndEnveloped:
184		p7->type=obj;
185		if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
186			== NULL) goto err;
187		ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
188		if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))
189			goto err;
190		p7->d.signed_and_enveloped->enc_data->content_type
191						= OBJ_nid2obj(NID_pkcs7_data);
192		break;
193	case NID_pkcs7_enveloped:
194		p7->type=obj;
195		if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
196			== NULL) goto err;
197		if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
198			goto err;
199		p7->d.enveloped->enc_data->content_type
200						= OBJ_nid2obj(NID_pkcs7_data);
201		break;
202	case NID_pkcs7_encrypted:
203		p7->type=obj;
204		if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
205			== NULL) goto err;
206		if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
207			goto err;
208		p7->d.encrypted->enc_data->content_type
209						= OBJ_nid2obj(NID_pkcs7_data);
210		break;
211
212	case NID_pkcs7_digest:
213		p7->type=obj;
214		if ((p7->d.digest=PKCS7_DIGEST_new())
215			== NULL) goto err;
216		if (!ASN1_INTEGER_set(p7->d.digest->version,0))
217			goto err;
218		break;
219	default:
220		PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
221		goto err;
222		}
223	return(1);
224err:
225	return(0);
226	}
227
228int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
229	{
230	p7->type = OBJ_nid2obj(type);
231	p7->d.other = other;
232	return 1;
233	}
234
235int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
236	{
237	int i,j,nid;
238	X509_ALGOR *alg;
239	STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
240	STACK_OF(X509_ALGOR) *md_sk;
241
242	i=OBJ_obj2nid(p7->type);
243	switch (i)
244		{
245	case NID_pkcs7_signed:
246		signer_sk=	p7->d.sign->signer_info;
247		md_sk=		p7->d.sign->md_algs;
248		break;
249	case NID_pkcs7_signedAndEnveloped:
250		signer_sk=	p7->d.signed_and_enveloped->signer_info;
251		md_sk=		p7->d.signed_and_enveloped->md_algs;
252		break;
253	default:
254		PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
255		return(0);
256		}
257
258	nid=OBJ_obj2nid(psi->digest_alg->algorithm);
259
260	/* If the digest is not currently listed, add it */
261	j=0;
262	for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
263		{
264		alg=sk_X509_ALGOR_value(md_sk,i);
265		if (OBJ_obj2nid(alg->algorithm) == nid)
266			{
267			j=1;
268			break;
269			}
270		}
271	if (!j) /* we need to add another algorithm */
272		{
273		if(!(alg=X509_ALGOR_new())
274			|| !(alg->parameter = ASN1_TYPE_new())) {
275			PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
276			return(0);
277		}
278		alg->algorithm=OBJ_nid2obj(nid);
279		alg->parameter->type = V_ASN1_NULL;
280		sk_X509_ALGOR_push(md_sk,alg);
281		}
282
283	sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
284	return(1);
285	}
286
287int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
288	{
289	int i;
290	STACK_OF(X509) **sk;
291
292	i=OBJ_obj2nid(p7->type);
293	switch (i)
294		{
295	case NID_pkcs7_signed:
296		sk= &(p7->d.sign->cert);
297		break;
298	case NID_pkcs7_signedAndEnveloped:
299		sk= &(p7->d.signed_and_enveloped->cert);
300		break;
301	default:
302		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
303		return(0);
304		}
305
306	if (*sk == NULL)
307		*sk=sk_X509_new_null();
308	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
309	sk_X509_push(*sk,x509);
310	return(1);
311	}
312
313int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
314	{
315	int i;
316	STACK_OF(X509_CRL) **sk;
317
318	i=OBJ_obj2nid(p7->type);
319	switch (i)
320		{
321	case NID_pkcs7_signed:
322		sk= &(p7->d.sign->crl);
323		break;
324	case NID_pkcs7_signedAndEnveloped:
325		sk= &(p7->d.signed_and_enveloped->crl);
326		break;
327	default:
328		PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
329		return(0);
330		}
331
332	if (*sk == NULL)
333		*sk=sk_X509_CRL_new_null();
334
335	CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
336	sk_X509_CRL_push(*sk,crl);
337	return(1);
338	}
339
340int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
341	     const EVP_MD *dgst)
342	{
343	int nid;
344	char is_dsa;
345
346	if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
347		is_dsa = 1;
348	else
349		is_dsa = 0;
350	/* We now need to add another PKCS7_SIGNER_INFO entry */
351	if (!ASN1_INTEGER_set(p7i->version,1))
352		goto err;
353	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
354			X509_get_issuer_name(x509)))
355		goto err;
356
357	/* because ASN1_INTEGER_set is used to set a 'long' we will do
358	 * things the ugly way. */
359	M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
360	if (!(p7i->issuer_and_serial->serial=
361			M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
362		goto err;
363
364	/* lets keep the pkey around for a while */
365	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
366	p7i->pkey=pkey;
367
368	/* Set the algorithms */
369	if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
370	else
371		p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
372
373	if (p7i->digest_alg->parameter != NULL)
374		ASN1_TYPE_free(p7i->digest_alg->parameter);
375	if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
376		goto err;
377	p7i->digest_alg->parameter->type=V_ASN1_NULL;
378
379	if (p7i->digest_enc_alg->parameter != NULL)
380		ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
381	nid = EVP_PKEY_type(pkey->type);
382	if (nid == EVP_PKEY_RSA)
383		{
384		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
385		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
386			goto err;
387		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
388		}
389	else if (nid == EVP_PKEY_DSA)
390		{
391#if 1
392		/* use 'dsaEncryption' OID for compatibility with other software
393		 * (PKCS #7 v1.5 does specify how to handle DSA) ... */
394		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
395#else
396		/* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
397		 * would make more sense. */
398		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
399#endif
400		p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
401		}
402	else if (nid == EVP_PKEY_EC)
403		{
404		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
405		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
406			goto err;
407		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
408		}
409	else
410		return(0);
411
412	return(1);
413err:
414	return(0);
415	}
416
417PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
418	     const EVP_MD *dgst)
419	{
420	PKCS7_SIGNER_INFO *si;
421
422	if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
423	if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
424	if (!PKCS7_add_signer(p7,si)) goto err;
425	return(si);
426err:
427	return(NULL);
428	}
429
430int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
431	{
432	if (PKCS7_type_is_digest(p7))
433		{
434		if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))
435			{
436			PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);
437			return 0;
438			}
439		p7->d.digest->md->parameter->type = V_ASN1_NULL;
440		p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
441		return 1;
442		}
443
444	PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);
445	return 1;
446	}
447
448STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
449	{
450	if (PKCS7_type_is_signed(p7))
451		{
452		return(p7->d.sign->signer_info);
453		}
454	else if (PKCS7_type_is_signedAndEnveloped(p7))
455		{
456		return(p7->d.signed_and_enveloped->signer_info);
457		}
458	else
459		return(NULL);
460	}
461
462PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
463	{
464	PKCS7_RECIP_INFO *ri;
465
466	if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
467	if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
468	if (!PKCS7_add_recipient_info(p7,ri)) goto err;
469	return(ri);
470err:
471	return(NULL);
472	}
473
474int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
475	{
476	int i;
477	STACK_OF(PKCS7_RECIP_INFO) *sk;
478
479	i=OBJ_obj2nid(p7->type);
480	switch (i)
481		{
482	case NID_pkcs7_signedAndEnveloped:
483		sk=	p7->d.signed_and_enveloped->recipientinfo;
484		break;
485	case NID_pkcs7_enveloped:
486		sk=	p7->d.enveloped->recipientinfo;
487		break;
488	default:
489		PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
490		return(0);
491		}
492
493	sk_PKCS7_RECIP_INFO_push(sk,ri);
494	return(1);
495	}
496
497int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
498	{
499	if (!ASN1_INTEGER_set(p7i->version,0))
500		return 0;
501	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
502		X509_get_issuer_name(x509)))
503		return 0;
504
505	M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
506	if (!(p7i->issuer_and_serial->serial=
507		M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
508		return 0;
509
510	X509_ALGOR_free(p7i->key_enc_algor);
511	if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
512		return 0;
513
514	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
515	p7i->cert=x509;
516
517	return(1);
518	}
519
520X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
521	{
522	if (PKCS7_type_is_signed(p7))
523		return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
524			si->issuer_and_serial->issuer,
525			si->issuer_and_serial->serial));
526	else
527		return(NULL);
528	}
529
530int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
531	{
532	int i;
533	ASN1_OBJECT *objtmp;
534	PKCS7_ENC_CONTENT *ec;
535
536	i=OBJ_obj2nid(p7->type);
537	switch (i)
538		{
539	case NID_pkcs7_signedAndEnveloped:
540		ec=p7->d.signed_and_enveloped->enc_data;
541		break;
542	case NID_pkcs7_enveloped:
543		ec=p7->d.enveloped->enc_data;
544		break;
545	default:
546		PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
547		return(0);
548		}
549
550	/* Check cipher OID exists and has data in it*/
551	i = EVP_CIPHER_type(cipher);
552	if(i == NID_undef) {
553		PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
554		return(0);
555	}
556	objtmp = OBJ_nid2obj(i);
557
558	ec->cipher = cipher;
559	return 1;
560	}
561
562