[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 */

DECLARE_ASN1_ITEM(CMS_EncryptedData)

/* Return BIO based on EncryptedContentInfo and key */

BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
	{
	BIO *b;
	EVP_CIPHER_CTX *ctx;
	const EVP_CIPHER *ciph;
	X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
	unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;

	int ok = 0;

	int enc;

	enc = ec->cipher ? 1 : 0;

	b = BIO_new(BIO_f_cipher());
	if (!b)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
							ERR_R_MALLOC_FAILURE);
		return NULL;
		}

	BIO_get_cipher_ctx(b, &ctx);

	if (enc)
		ciph = ec->cipher;
	else
		{
		ciph = EVP_get_cipherbyobj(calg->algorithm);

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

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

	if (enc)
		calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));

	/* If necessary set key length */

	if (ec->keylen != EVP_CIPHER_CTX_key_length(ctx))
		{
		if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
				CMS_R_INVALID_KEY_LENGTH);
			goto err;
			}
		}

	if (enc)
		{
		int ivlen;
		/* 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)
				goto err;
			piv = iv;
			}
		}
	else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
				CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
			goto err;
			}

	if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
				CMS_R_CIPHER_INITIALISATION_ERROR);
		goto err;
		}

	if (piv)
		{
		calg->parameter = ASN1_TYPE_new();
		if (!calg->parameter)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
							ERR_R_MALLOC_FAILURE);
			goto err;
			}
		if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
				CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
			goto err;
			}
		}
	ok = 1;

	err:
	if (ec->key)
		{
		OPENSSL_cleanse(ec->key, ec->keylen);
		OPENSSL_free(ec->key);
		ec->key = NULL;
		}
	if (ok)
		return b;
	BIO_free(b);
	return NULL;
	}

int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec, 
				const EVP_CIPHER *cipher,
				const unsigned char *key, size_t keylen)
	{
	ec->cipher = cipher;
	ec->key = OPENSSL_malloc(keylen);
	if (!ec->key)
		return 0;
	if (cipher)
		ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
	memcpy(ec->key, key, keylen);
	ec->keylen = keylen;
	return 1;
	}

int CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
				const unsigned char *key, size_t keylen)
	{
	CMS_EncryptedContentInfo *ec;
	if (ciph)
		{
		cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
		if (!cms->d.encryptedData)
			{
			CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
				ERR_R_MALLOC_FAILURE);
			return 0;
			}
		cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
		cms->d.encryptedData->version = 0;
		}
	else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
						CMS_R_NOT_ENCRYPTED_DATA);
		return 0;
		}
	ec = cms->d.encryptedData->encryptedContentInfo;
	return cms_EncryptedContent_init(ec, ciph, key, keylen);
	}

BIO *cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
	{
	CMS_EncryptedContentInfo *ec;
	if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
		{
		CMSerr(CMS_F_CMS_ENCRYPTEDDATA_INIT_BIO,
						CMS_R_NOT_ENCRYPTED_DATA);
		return NULL;
		}
	ec = cms->d.encryptedData->encryptedContentInfo;
	return cms_EncryptedContent_init_bio(ec);
	}
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
320bfc1b	66	DECLARE_ASN1_ITEM(CMS_EncryptedData)
5c4436c9	67
320bfc1b DSH	68	/* Return BIO based on EncryptedContentInfo and key */
	69
	70	BIO cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo ec)
5c4436c9	71	{
320bfc1b DSH	72	BIO *b;
	73	EVP_CIPHER_CTX *ctx;
	74	const EVP_CIPHER *ciph;
	75	X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
	76	unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
5c4436c9	77
d9f5f07e DSH	78	int ok = 0;
d9f5f07e DSH	79
320bfc1b	80	int enc;
5c4436c9	81
320bfc1b	82	enc = ec->cipher ? 1 : 0;
5c4436c9	83
320bfc1b DSH	84	b = BIO_new(BIO_f_cipher());
320bfc1b DSH	85	if (!b)
5c4436c9	86	{
320bfc1b DSH	87	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
	88	ERR_R_MALLOC_FAILURE);
	89	return NULL;
5c4436c9 DSH	90	}
5c4436c9 DSH	91
320bfc1b	92	BIO_get_cipher_ctx(b, &ctx);
5c4436c9	93
320bfc1b	94	if (enc)
d9f5f07e	95	ciph = ec->cipher;
5c4436c9	96	else
5c4436c9	97	{
320bfc1b	98	ciph = EVP_get_cipherbyobj(calg->algorithm);
5c4436c9	99
320bfc1b	100	if (!ciph)
5c4436c9	101	{
320bfc1b DSH	102	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
	103	CMS_R_UNKNOWN_CIPHER);
	104	goto err;
5c4436c9 DSH	105	}
	106	}
	107
320bfc1b	108	if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0)
5c4436c9	109	{
320bfc1b	110	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
5c4436c9 DSH	111	CMS_R_CIPHER_INITIALISATION_ERROR);
	112	goto err;
	113	}
	114
d9f5f07e DSH	115	if (enc)
	116	calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
	117
5c4436c9 DSH	118	/* If necessary set key length */
5c4436c9 DSH	119
320bfc1b	120	if (ec->keylen != EVP_CIPHER_CTX_key_length(ctx))
5c4436c9	121	{
320bfc1b	122	if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
5c4436c9	123	{
320bfc1b	124	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
5c4436c9 DSH	125	CMS_R_INVALID_KEY_LENGTH);
	126	goto err;
	127	}
	128	}
	129
320bfc1b DSH	130	if (enc)
	131	{
	132	int ivlen;
	133	/* Generate a random IV if we need one */
	134	ivlen = EVP_CIPHER_CTX_iv_length(ctx);
	135	if (ivlen > 0)
	136	{
	137	if (RAND_pseudo_bytes(iv, ivlen) <= 0)
	138	goto err;
	139	piv = iv;
	140	}
	141	}
	142	else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0)
	143	{
	144	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
	145	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
	146	goto err;
	147	}
	148
	149	if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
5c4436c9	150	{
320bfc1b	151	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
5c4436c9 DSH	152	CMS_R_CIPHER_INITIALISATION_ERROR);
	153	goto err;
	154	}
	155
320bfc1b DSH	156	if (piv)
	157	{
	158	calg->parameter = ASN1_TYPE_new();
	159	if (!calg->parameter)
	160	{
	161	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
	162	ERR_R_MALLOC_FAILURE);
	163	goto err;
	164	}
	165	if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0)
5c4436c9	166	{
320bfc1b	167	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
5c4436c9 DSH	168	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
	169	goto err;
	170	}
320bfc1b	171	}
d9f5f07e	172	ok = 1;
5c4436c9 DSH	173
5c4436c9 DSH	174	err:
d9f5f07e DSH	175	if (ec->key)
	176	{
	177	OPENSSL_cleanse(ec->key, ec->keylen);
	178	OPENSSL_free(ec->key);
	179	ec->key = NULL;
	180	}
	181	if (ok)
	182	return b;
320bfc1b DSH	183	BIO_free(b);
320bfc1b DSH	184	return NULL;
5c4436c9 DSH	185	}
5c4436c9 DSH	186
320bfc1b DSH	187	int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
	188	const EVP_CIPHER *cipher,
	189	const unsigned char *key, size_t keylen)
	190	{
	191	ec->cipher = cipher;
	192	ec->key = OPENSSL_malloc(keylen);
	193	if (!ec->key)
	194	return 0;
	195	if (cipher)
	196	ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
	197	memcpy(ec->key, key, keylen);
	198	ec->keylen = keylen;
	199	return 1;
	200	}
	201
	202	int CMS_EncryptedData_set1_key(CMS_ContentInfo cms, const EVP_CIPHER ciph,
b820455c DSH	203	const unsigned char *key, size_t keylen)
	204	{
	205	CMS_EncryptedContentInfo *ec;
320bfc1b DSH	206	if (ciph)
	207	{
	208	cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
	209	if (!cms->d.encryptedData)
	210	{
	211	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
	212	ERR_R_MALLOC_FAILURE);
	213	return 0;
	214	}
	215	cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
	216	cms->d.encryptedData->version = 0;
	217	}
	218	else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
	219	{
	220	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
	221	CMS_R_NOT_ENCRYPTED_DATA);
b820455c	222	return 0;
320bfc1b DSH	223	}
	224	ec = cms->d.encryptedData->encryptedContentInfo;
	225	return cms_EncryptedContent_init(ec, ciph, key, keylen);
	226	}
	227
	228	BIO cms_EncryptedData_init_bio(CMS_ContentInfo cms)
	229	{
	230	CMS_EncryptedContentInfo *ec;
	231	if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
	232	{
	233	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_INIT_BIO,
	234	CMS_R_NOT_ENCRYPTED_DATA);
	235	return NULL;
	236	}
b820455c	237	ec = cms->d.encryptedData->encryptedContentInfo;
320bfc1b	238	return cms_EncryptedContent_init_bio(ec);
b820455c	239	}