[thirdparty/openssl.git] / crypto / cms / cms_enc.c

/* crypto/cms/cms_enc.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/cms.h>
#include <openssl/rand.h>
#include "cms_lcl.h"
#include "asn1_locl.h"

/* CMS EncryptedData Utilities */

/* Set up EncryptedContentInfo based on supplied cipher bio */

int cms_bio_to_EncryptedContent(CMS_EncryptedContentInfo *ec,
					const unsigned char *key, int keylen,
					BIO *b)
	{
	EVP_CIPHER_CTX *ctx = NULL;
	unsigned char iv[EVP_MAX_IV_LENGTH], *piv;
	int ivlen;

	BIO_get_cipher_ctx(b, &ctx);

	/* If necessary set key length */

	if (keylen != EVP_CIPHER_CTX_key_length(ctx))
		{
		if (EVP_CIPHER_CTX_set_key_length(ctx, keylen) <= 0)
			{
			CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
				CMS_R_INVALID_KEY_LENGTH);
			return 0;
			}
		}

	/* Generate a random IV if we need one */

	ivlen = EVP_CIPHER_CTX_iv_length(ctx);
	if (ivlen > 0)
		{
		if (RAND_pseudo_bytes(iv, ivlen) <= 0)
			return 0;
		piv = iv;
		}
	else
		piv = NULL;

	if (EVP_CipherInit_ex(ctx, NULL, NULL, key, piv, 1) <= 0)
		{
		CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
				CMS_R_CIPHER_INITIALISATION_ERROR);
		return 0;
		}

	ec->contentEncryptionAlgorithm->algorithm =
			OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));

	if (piv)
		{
		ec->contentEncryptionAlgorithm->parameter = ASN1_TYPE_new();
		if (!ec->contentEncryptionAlgorithm->parameter)
			{
			CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
							ERR_R_MALLOC_FAILURE);
			return 0;
			}
		if (EVP_CIPHER_param_to_asn1(ctx, 
			ec->contentEncryptionAlgorithm->parameter) <= 0)
			{
			CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
				CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
			return 0;
			}
		}

	return 1;
	}

/* Return BIO based on EncryptedContentInfo and key */

int cms_EncryptedContent_to_bio(BIO *b, CMS_EncryptedContentInfo *ec,
					const unsigned char *key, int keylen)
	{
	EVP_CIPHER_CTX *ctx;
	const EVP_CIPHER *ciph;
	BIO_get_cipher_ctx(b, &ctx);

	ciph = EVP_get_cipherbyobj(ec->contentEncryptionAlgorithm->algorithm);

	if (!ciph)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO, CMS_R_UNKNOWN_CIPHER);
		goto err;
		}

	if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, 0) <= 0)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
				CMS_R_CIPHER_INITIALISATION_ERROR);
		goto err;
		}

	/* If necessary set key length */

	if (keylen != EVP_CIPHER_CTX_key_length(ctx))
		{
		if (EVP_CIPHER_CTX_set_key_length(ctx, keylen) <= 0)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
				CMS_R_INVALID_KEY_LENGTH);
			goto err;
			}
		}

	if (EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, 0) <= 0)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
				CMS_R_CIPHER_INITIALISATION_ERROR);
		goto err;
		}

	if (EVP_CIPHER_asn1_to_param(ctx, 
			ec->contentEncryptionAlgorithm->parameter) <= 0)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
				CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
			goto err;
			}
	return 1;

	err:
	return 0;
	}

int CMS_EncryptedData_set1_key(BIO *b, CMS_ContentInfo *cms,
				const unsigned char *key, size_t keylen)
	{
	CMS_EncryptedContentInfo *ec;
	if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
		return 0;
	ec = cms->d.encryptedData->encryptedContentInfo;
	return cms_EncryptedContent_to_bio(b, ec, key, keylen);
	}
Commit	Line	Data
5c4436c9 DSH	1	/* crypto/cms/cms_enc.c */
	2	/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
	3	* project.
	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*/
	53
	54	#include "cryptlib.h"
	55	#include <openssl/asn1t.h>
	56	#include <openssl/pem.h>
	57	#include <openssl/x509v3.h>
	58	#include <openssl/err.h>
	59	#include <openssl/cms.h>
	60	#include <openssl/rand.h>
	61	#include "cms_lcl.h"
	62	#include "asn1_locl.h"
	63
	64	/* CMS EncryptedData Utilities */
65
66	/* Set up EncryptedContentInfo based on supplied cipher bio */
67
68	int cms_bio_to_EncryptedContent(CMS_EncryptedContentInfo *ec,
69	const unsigned char *key, int keylen,
70	BIO *b)
71	{
72	EVP_CIPHER_CTX *ctx = NULL;
73	unsigned char iv[EVP_MAX_IV_LENGTH], *piv;
74	int ivlen;
75
76	BIO_get_cipher_ctx(b, &ctx);
77
78	/* If necessary set key length */
79
80	if (keylen != EVP_CIPHER_CTX_key_length(ctx))
81	{
82	if (EVP_CIPHER_CTX_set_key_length(ctx, keylen) <= 0)
83	{
84	CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
85	CMS_R_INVALID_KEY_LENGTH);
86	return 0;
87	}
88	}
89
90	/* Generate a random IV if we need one */
91
92	ivlen = EVP_CIPHER_CTX_iv_length(ctx);
93	if (ivlen > 0)
94	{
95	if (RAND_pseudo_bytes(iv, ivlen) <= 0)
96	return 0;
97	piv = iv;
98	}
99	else
100	piv = NULL;
101
102	if (EVP_CipherInit_ex(ctx, NULL, NULL, key, piv, 1) <= 0)
103	{
104	CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
105	CMS_R_CIPHER_INITIALISATION_ERROR);
106	return 0;
107	}
108
109	ec->contentEncryptionAlgorithm->algorithm =
110	OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
111
112	if (piv)
113	{
114	ec->contentEncryptionAlgorithm->parameter = ASN1_TYPE_new();
115	if (!ec->contentEncryptionAlgorithm->parameter)
116	{
117	CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
118	ERR_R_MALLOC_FAILURE);
119	return 0;
120	}
121	if (EVP_CIPHER_param_to_asn1(ctx,
122	ec->contentEncryptionAlgorithm->parameter) <= 0)
123	{
124	CMSerr(CMS_F_CMS_BIO_TO_ENCRYPTEDCONTENT,
125	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
126	return 0;
127	}
128	}
129
130	return 1;
131	}
132
133	/* Return BIO based on EncryptedContentInfo and key */
134
b820455c	135	int cms_EncryptedContent_to_bio(BIO b, CMS_EncryptedContentInfo ec,
5c4436c9 DSH	136	const unsigned char *key, int keylen)
5c4436c9 DSH	137	{
5c4436c9 DSH	138	EVP_CIPHER_CTX *ctx;
5c4436c9 DSH	139	const EVP_CIPHER *ciph;
5c4436c9 DSH	140	BIO_get_cipher_ctx(b, &ctx);
	141
	142	ciph = EVP_get_cipherbyobj(ec->contentEncryptionAlgorithm->algorithm);
	143
	144	if (!ciph)
	145	{
	146	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO, CMS_R_UNKNOWN_CIPHER);
	147	goto err;
	148	}
	149
	150	if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, 0) <= 0)
	151	{
	152	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
	153	CMS_R_CIPHER_INITIALISATION_ERROR);
	154	goto err;
	155	}
	156
	157	/* If necessary set key length */
	158
	159	if (keylen != EVP_CIPHER_CTX_key_length(ctx))
	160	{
	161	if (EVP_CIPHER_CTX_set_key_length(ctx, keylen) <= 0)
	162	{
	163	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
	164	CMS_R_INVALID_KEY_LENGTH);
	165	goto err;
	166	}
	167	}
	168
	169	if (EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, 0) <= 0)
	170	{
	171	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
	172	CMS_R_CIPHER_INITIALISATION_ERROR);
	173	goto err;
	174	}
	175
	176	if (EVP_CIPHER_asn1_to_param(ctx,
	177	ec->contentEncryptionAlgorithm->parameter) <= 0)
	178	{
	179	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_TO_BIO,
	180	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
	181	goto err;
	182	}
b820455c	183	return 1;
5c4436c9 DSH	184
5c4436c9 DSH	185	err:
b820455c	186	return 0;
5c4436c9 DSH	187	}
5c4436c9 DSH	188
b820455c DSH	189	int CMS_EncryptedData_set1_key(BIO b, CMS_ContentInfo cms,
	190	const unsigned char *key, size_t keylen)
	191	{
	192	CMS_EncryptedContentInfo *ec;
	193	if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
	194	return 0;
	195	ec = cms->d.encryptedData->encryptedContentInfo;
	196	return cms_EncryptedContent_to_bio(b, ec, key, keylen);
	197	}