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	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);
150err:
151	return(0);
152	}
153
154int 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  		break;
187		p7->d.signed_and_enveloped->enc_data->content_type
188						= OBJ_nid2obj(NID_pkcs7_data);
189		break;
190	case NID_pkcs7_enveloped:
191		p7->type=obj;
192		if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
193			== NULL) goto err;
194		if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
195			goto err;
196		p7->d.enveloped->enc_data->content_type
197						= OBJ_nid2obj(NID_pkcs7_data);
198		break;
199	case NID_pkcs7_encrypted:
200		p7->type=obj;
201		if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
202			== NULL) goto err;
203		if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
204			goto err;
205		p7->d.encrypted->enc_data->content_type
206						= OBJ_nid2obj(NID_pkcs7_data);
207		break;
208
209	case NID_pkcs7_digest:
210	default:
211		PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
212		goto err;
213		}
214	return(1);
215err:
216	return(0);
217	}
218
219int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
220	{
221	int i,j,nid;
222	X509_ALGOR *alg;
223	STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
224	STACK_OF(X509_ALGOR) *md_sk;
225
226	i=OBJ_obj2nid(p7->type);
227	switch (i)
228		{
229	case NID_pkcs7_signed:
230		signer_sk=	p7->d.sign->signer_info;
231		md_sk=		p7->d.sign->md_algs;
232		break;
233	case NID_pkcs7_signedAndEnveloped:
234		signer_sk=	p7->d.signed_and_enveloped->signer_info;
235		md_sk=		p7->d.signed_and_enveloped->md_algs;
236		break;
237	default:
238		PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
239		return(0);
240		}
241
242	nid=OBJ_obj2nid(psi->digest_alg->algorithm);
243
244	/* If the digest is not currently listed, add it */
245	j=0;
246	for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
247		{
248		alg=sk_X509_ALGOR_value(md_sk,i);
249		if (OBJ_obj2nid(alg->algorithm) == nid)
250			{
251			j=1;
252			break;
253			}
254		}
255	if (!j) /* we need to add another algorithm */
256		{
257		if(!(alg=X509_ALGOR_new())
258			|| !(alg->parameter = ASN1_TYPE_new())) {
259			PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
260			return(0);
261		}
262		alg->algorithm=OBJ_nid2obj(nid);
263		alg->parameter->type = V_ASN1_NULL;
264		sk_X509_ALGOR_push(md_sk,alg);
265		}
266
267	sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
268	return(1);
269	}
270
271int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
272	{
273	int i;
274	STACK_OF(X509) **sk;
275
276	i=OBJ_obj2nid(p7->type);
277	switch (i)
278		{
279	case NID_pkcs7_signed:
280		sk= &(p7->d.sign->cert);
281		break;
282	case NID_pkcs7_signedAndEnveloped:
283		sk= &(p7->d.signed_and_enveloped->cert);
284		break;
285	default:
286		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
287		return(0);
288		}
289
290	if (*sk == NULL)
291		*sk=sk_X509_new_null();
292	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
293	sk_X509_push(*sk,x509);
294	return(1);
295	}
296
297int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
298	{
299	int i;
300	STACK_OF(X509_CRL) **sk;
301
302	i=OBJ_obj2nid(p7->type);
303	switch (i)
304		{
305	case NID_pkcs7_signed:
306		sk= &(p7->d.sign->crl);
307		break;
308	case NID_pkcs7_signedAndEnveloped:
309		sk= &(p7->d.signed_and_enveloped->crl);
310		break;
311	default:
312		PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
313		return(0);
314		}
315
316	if (*sk == NULL)
317		*sk=sk_X509_CRL_new_null();
318
319	CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
320	sk_X509_CRL_push(*sk,crl);
321	return(1);
322	}
323
324int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
325	     const EVP_MD *dgst)
326	{
327	char is_dsa;
328	if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
329	else is_dsa = 0;
330	/* We now need to add another PKCS7_SIGNER_INFO entry */
331	if (!ASN1_INTEGER_set(p7i->version,1))
332		goto err;
333	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
334			X509_get_issuer_name(x509)))
335		goto err;
336
337	/* because ASN1_INTEGER_set is used to set a 'long' we will do
338	 * things the ugly way. */
339	M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
340	if (!(p7i->issuer_and_serial->serial=
341			M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
342		goto err;
343
344	/* lets keep the pkey around for a while */
345	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
346	p7i->pkey=pkey;
347
348	/* Set the algorithms */
349	if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
350	else
351		p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
352
353	if (p7i->digest_alg->parameter != NULL)
354		ASN1_TYPE_free(p7i->digest_alg->parameter);
355	if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
356		goto err;
357	p7i->digest_alg->parameter->type=V_ASN1_NULL;
358
359	p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
360
361	if (p7i->digest_enc_alg->parameter != NULL)
362		ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
363	if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
364	else {
365		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
366			goto err;
367		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
368	}
369
370	return(1);
371err:
372	return(0);
373	}
374
375PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
376	     const EVP_MD *dgst)
377	{
378	PKCS7_SIGNER_INFO *si;
379
380	if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
381	if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
382	if (!PKCS7_add_signer(p7,si)) goto err;
383	return(si);
384err:
385	return(NULL);
386	}
387
388STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
389	{
390	if (PKCS7_type_is_signed(p7))
391		{
392		return(p7->d.sign->signer_info);
393		}
394	else if (PKCS7_type_is_signedAndEnveloped(p7))
395		{
396		return(p7->d.signed_and_enveloped->signer_info);
397		}
398	else
399		return(NULL);
400	}
401
402PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
403	{
404	PKCS7_RECIP_INFO *ri;
405
406	if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
407	if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
408	if (!PKCS7_add_recipient_info(p7,ri)) goto err;
409	return(ri);
410err:
411	return(NULL);
412	}
413
414int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
415	{
416	int i;
417	STACK_OF(PKCS7_RECIP_INFO) *sk;
418
419	i=OBJ_obj2nid(p7->type);
420	switch (i)
421		{
422	case NID_pkcs7_signedAndEnveloped:
423		sk=	p7->d.signed_and_enveloped->recipientinfo;
424		break;
425	case NID_pkcs7_enveloped:
426		sk=	p7->d.enveloped->recipientinfo;
427		break;
428	default:
429		PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
430		return(0);
431		}
432
433	sk_PKCS7_RECIP_INFO_push(sk,ri);
434	return(1);
435	}
436
437int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
438	{
439	if (!ASN1_INTEGER_set(p7i->version,0))
440		return 0;
441	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
442		X509_get_issuer_name(x509)))
443		return 0;
444
445	M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
446	if (!(p7i->issuer_and_serial->serial=
447		M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
448		return 0;
449
450	X509_ALGOR_free(p7i->key_enc_algor);
451	if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
452		return 0;
453
454	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
455	p7i->cert=x509;
456
457	return(1);
458	}
459
460X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
461	{
462	if (PKCS7_type_is_signed(p7))
463		return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
464			si->issuer_and_serial->issuer,
465			si->issuer_and_serial->serial));
466	else
467		return(NULL);
468	}
469
470int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
471	{
472	int i;
473	ASN1_OBJECT *objtmp;
474	PKCS7_ENC_CONTENT *ec;
475
476	i=OBJ_obj2nid(p7->type);
477	switch (i)
478		{
479	case NID_pkcs7_signedAndEnveloped:
480		ec=p7->d.signed_and_enveloped->enc_data;
481		break;
482	case NID_pkcs7_enveloped:
483		ec=p7->d.enveloped->enc_data;
484		break;
485	default:
486		PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
487		return(0);
488		}
489
490	/* Check cipher OID exists and has data in it*/
491	i = EVP_CIPHER_type(cipher);
492	if(i == NID_undef) {
493		PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
494		return(0);
495	}
496	objtmp = OBJ_nid2obj(i);
497
498	ec->cipher = cipher;
499	return 1;
500	}
501
502