[thirdparty/openssl.git] / crypto / asn1 / a_verify.c

/* crypto/asn1/a_verify.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <time.h>

#include "cryptlib.h"

#ifndef NO_SYS_TYPES_H
# include <sys/types.h>
#endif

#include <openssl/bn.h>
#include <openssl/x509.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/evp.h>

#ifndef NO_ASN1_OLD

int ASN1_verify(int (*i2d)(void *, unsigned char **),
		X509_ALGOR *a, ASN1_BIT_STRING *signature,
		char *data, EVP_PKEY *pkey)
	{
	EVP_MD_CTX ctx;
	const EVP_MD *type;
	unsigned char *p,*buf_in=NULL;
	int ret= -1,i,inl;

	EVP_MD_CTX_init(&ctx);
	i=OBJ_obj2nid(a->algorithm);
	type=EVP_get_digestbyname(OBJ_nid2sn(i));
	if (type == NULL)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
		goto err;
		}
	
	inl=i2d(data,NULL);
	buf_in=OPENSSL_malloc((unsigned int)inl);
	if (buf_in == NULL)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
		goto err;
		}
	p=buf_in;

	i2d(data,&p);
	EVP_VerifyInit_ex(&ctx,type, NULL);
	EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl);

	OPENSSL_cleanse(buf_in,(unsigned int)inl);
	OPENSSL_free(buf_in);

	if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
			(unsigned int)signature->length,pkey) <= 0)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
		ret=0;
		goto err;
		}
	/* we don't need to zero the 'ctx' because we just checked
	 * public information */
	/* memset(&ctx,0,sizeof(ctx)); */
	ret=1;
err:
	EVP_MD_CTX_cleanup(&ctx);
	return(ret);
	}

#endif


int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, ASN1_BIT_STRING *signature,
	     void *asn, EVP_PKEY *pkey)
	{
	EVP_MD_CTX ctx;
	const EVP_MD *type;
	unsigned char *buf_in=NULL;
	int ret= -1,i,inl;

	EVP_MD_CTX_init(&ctx);
	i=OBJ_obj2nid(a->algorithm);
	type=EVP_get_digestbyname(OBJ_nid2sn(i));
	if (type == NULL)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
		goto err;
		}

	inl = ASN1_item_i2d(asn, &buf_in, it);
	
	if (buf_in == NULL)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	if (!EVP_VerifyInit_ex(&ctx,type, NULL))
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
		ret=0;
		goto err;
		}
	EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl);

	OPENSSL_cleanse(buf_in,(unsigned int)inl);
	OPENSSL_free(buf_in);

	if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
			(unsigned int)signature->length,pkey) <= 0)
		{
		ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
		ret=0;
		goto err;
		}
	/* we don't need to zero the 'ctx' because we just checked
	 * public information */
	/* memset(&ctx,0,sizeof(ctx)); */
	ret=1;
err:
	EVP_MD_CTX_cleanup(&ctx);
	return(ret);
	}
Commit	Line	Data
d02b48c6	1	/* crypto/asn1/a_verify.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	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 <time.h>
d02b48c6 RE	61
d02b48c6 RE	62	#include "cryptlib.h"
17f389bb AP	63
	64	#ifndef NO_SYS_TYPES_H
	65	# include <sys/types.h>
	66	#endif
	67
ec577822 BM	68	#include <openssl/bn.h>
	69	#include <openssl/x509.h>
	70	#include <openssl/objects.h>
	71	#include <openssl/buffer.h>
	72	#include <openssl/evp.h>
d02b48c6	73
73e92de5 DSH	74	#ifndef NO_ASN1_OLD
73e92de5 DSH	75
41a15c4f BL	76	int ASN1_verify(int (i2d)(void , unsigned char **),
	77	X509_ALGOR a, ASN1_BIT_STRING signature,
	78	char data, EVP_PKEY pkey)
d02b48c6 RE	79	{
d02b48c6 RE	80	EVP_MD_CTX ctx;
e778802f	81	const EVP_MD *type;
d02b48c6 RE	82	unsigned char p,buf_in=NULL;
	83	int ret= -1,i,inl;
	84
dbad1690	85	EVP_MD_CTX_init(&ctx);
d02b48c6 RE	86	i=OBJ_obj2nid(a->algorithm);
	87	type=EVP_get_digestbyname(OBJ_nid2sn(i));
	88	if (type == NULL)
	89	{
	90	ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
	91	goto err;
	92	}
	93
	94	inl=i2d(data,NULL);
26a3a48d	95	buf_in=OPENSSL_malloc((unsigned int)inl);
d02b48c6 RE	96	if (buf_in == NULL)
	97	{
	98	ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
	99	goto err;
	100	}
	101	p=buf_in;
	102
	103	i2d(data,&p);
20d2186c	104	EVP_VerifyInit_ex(&ctx,type, NULL);
d02b48c6 RE	105	EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl);
d02b48c6 RE	106
4579924b	107	OPENSSL_cleanse(buf_in,(unsigned int)inl);
26a3a48d	108	OPENSSL_free(buf_in);
d02b48c6 RE	109
	110	if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
	111	(unsigned int)signature->length,pkey) <= 0)
	112	{
	113	ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
	114	ret=0;
	115	goto err;
	116	}
	117	/* we don't need to zero the 'ctx' because we just checked
	118	* public information */
	119	/* memset(&ctx,0,sizeof(ctx)); */
	120	ret=1;
	121	err:
dbad1690	122	EVP_MD_CTX_cleanup(&ctx);
d02b48c6 RE	123	return(ret);
d02b48c6 RE	124	}
09ab755c	125
73e92de5 DSH	126	#endif
73e92de5 DSH	127
09ab755c DSH	128
	129	int ASN1_item_verify(const ASN1_ITEM it, X509_ALGOR a, ASN1_BIT_STRING *signature,
	130	void asn, EVP_PKEY pkey)
	131	{
	132	EVP_MD_CTX ctx;
	133	const EVP_MD *type;
	134	unsigned char *buf_in=NULL;
	135	int ret= -1,i,inl;
	136
dbad1690	137	EVP_MD_CTX_init(&ctx);
09ab755c DSH	138	i=OBJ_obj2nid(a->algorithm);
	139	type=EVP_get_digestbyname(OBJ_nid2sn(i));
	140	if (type == NULL)
	141	{
	142	ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
	143	goto err;
	144	}
	145
	146	inl = ASN1_item_i2d(asn, &buf_in, it);
	147
	148	if (buf_in == NULL)
	149	{
	150	ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
	151	goto err;
	152	}
	153
bf746f0f RL	154	if (!EVP_VerifyInit_ex(&ctx,type, NULL))
	155	{
	156	ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
	157	ret=0;
	158	goto err;
	159	}
09ab755c DSH	160	EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl);
09ab755c DSH	161
4579924b	162	OPENSSL_cleanse(buf_in,(unsigned int)inl);
09ab755c DSH	163	OPENSSL_free(buf_in);
	164
	165	if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
	166	(unsigned int)signature->length,pkey) <= 0)
	167	{
	168	ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
	169	ret=0;
	170	goto err;
	171	}
	172	/* we don't need to zero the 'ctx' because we just checked
	173	* public information */
	174	/* memset(&ctx,0,sizeof(ctx)); */
	175	ret=1;
	176	err:
dbad1690	177	EVP_MD_CTX_cleanup(&ctx);
09ab755c DSH	178	return(ret);
	179	}
	180
	181