[thirdparty/openssl.git] / crypto / rsa / rsa_sign.c

/* crypto/rsa/rsa_sign.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 "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "rsa_locl.h"

/* Size of an SSL signature: MD5+SHA1 */
#define SSL_SIG_LENGTH  36

int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
             unsigned char *sigret, unsigned int *siglen, RSA *rsa)
{
    X509_SIG sig;
    ASN1_TYPE parameter;
    int i, j, ret = 1;
    unsigned char *p, *tmps = NULL;
    const unsigned char *s = NULL;
    X509_ALGOR algor;
    ASN1_OCTET_STRING digest;
    if ((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign) {
        return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa);
    }
    /* Special case: SSL signature, just check the length */
    if (type == NID_md5_sha1) {
        if (m_len != SSL_SIG_LENGTH) {
            RSAerr(RSA_F_RSA_SIGN, RSA_R_INVALID_MESSAGE_LENGTH);
            return (0);
        }
        i = SSL_SIG_LENGTH;
        s = m;
    } else {
        sig.algor = &algor;
        sig.algor->algorithm = OBJ_nid2obj(type);
        if (sig.algor->algorithm == NULL) {
            RSAerr(RSA_F_RSA_SIGN, RSA_R_UNKNOWN_ALGORITHM_TYPE);
            return (0);
        }
        if (OBJ_length(sig.algor->algorithm) == 0) {
            RSAerr(RSA_F_RSA_SIGN,
                   RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
            return (0);
        }
        parameter.type = V_ASN1_NULL;
        parameter.value.ptr = NULL;
        sig.algor->parameter = &parameter;

        sig.digest = &digest;
        sig.digest->data = (unsigned char *)m; /* TMP UGLY CAST */
        sig.digest->length = m_len;

        i = i2d_X509_SIG(&sig, NULL);
    }
    j = RSA_size(rsa);
    if (i > (j - RSA_PKCS1_PADDING_SIZE)) {
        RSAerr(RSA_F_RSA_SIGN, RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
        return (0);
    }
    if (type != NID_md5_sha1) {
        tmps = OPENSSL_malloc((unsigned int)j + 1);
        if (tmps == NULL) {
            RSAerr(RSA_F_RSA_SIGN, ERR_R_MALLOC_FAILURE);
            return (0);
        }
        p = tmps;
        i2d_X509_SIG(&sig, &p);
        s = tmps;
    }
    i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING);
    if (i <= 0)
        ret = 0;
    else
        *siglen = i;

    if (type != NID_md5_sha1)
        OPENSSL_clear_free(tmps, (unsigned int)j + 1);
    return (ret);
}

/*
 * Check DigestInfo structure does not contain extraneous data by reencoding
 * using DER and checking encoding against original.
 */
static int rsa_check_digestinfo(X509_SIG *sig, const unsigned char *dinfo,
                                int dinfolen)
{
    unsigned char *der = NULL;
    int derlen;
    int ret = 0;
    derlen = i2d_X509_SIG(sig, &der);
    if (derlen <= 0)
        return 0;
    if (derlen == dinfolen && !memcmp(dinfo, der, derlen))
        ret = 1;
    OPENSSL_clear_free(der, derlen);
    return ret;
}

int int_rsa_verify(int dtype, const unsigned char *m,
                   unsigned int m_len,
                   unsigned char *rm, size_t *prm_len,
                   const unsigned char *sigbuf, size_t siglen, RSA *rsa)
{
    int i, ret = 0, sigtype;
    unsigned char *s;
    X509_SIG *sig = NULL;

    if (siglen != (unsigned int)RSA_size(rsa)) {
        RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_WRONG_SIGNATURE_LENGTH);
        return (0);
    }

    if ((dtype == NID_md5_sha1) && rm) {
        i = RSA_public_decrypt((int)siglen,
                               sigbuf, rm, rsa, RSA_PKCS1_PADDING);
        if (i <= 0)
            return 0;
        *prm_len = i;
        return 1;
    }

    s = OPENSSL_malloc((unsigned int)siglen);
    if (s == NULL) {
        RSAerr(RSA_F_INT_RSA_VERIFY, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    if ((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH)) {
        RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_MESSAGE_LENGTH);
        goto err;
    }
    i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING);

    if (i <= 0)
        goto err;
    /*
     * Oddball MDC2 case: signature can be OCTET STRING. check for correct
     * tag and length octets.
     */
    if (dtype == NID_mdc2 && i == 18 && s[0] == 0x04 && s[1] == 0x10) {
        if (rm) {
            memcpy(rm, s + 2, 16);
            *prm_len = 16;
            ret = 1;
        } else if (memcmp(m, s + 2, 16))
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
        else
            ret = 1;
    }

    /* Special case: SSL signature */
    if (dtype == NID_md5_sha1) {
        if ((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
        else
            ret = 1;
    } else {
        const unsigned char *p = s;
        sig = d2i_X509_SIG(NULL, &p, (long)i);

        if (sig == NULL)
            goto err;

        /* Excess data can be used to create forgeries */
        if (p != s + i || !rsa_check_digestinfo(sig, s, i)) {
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
            goto err;
        }

        /*
         * Parameters to the signature algorithm can also be used to create
         * forgeries
         */
        if (sig->algor->parameter
            && ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL) {
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
            goto err;
        }

        sigtype = OBJ_obj2nid(sig->algor->algorithm);

#ifdef RSA_DEBUG
        /* put a backward compatibility flag in EAY */
        fprintf(stderr, "in(%s) expect(%s)\n", OBJ_nid2ln(sigtype),
                OBJ_nid2ln(dtype));
#endif
        if (sigtype != dtype) {
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_ALGORITHM_MISMATCH);
            goto err;
        }
        if (rm) {
            const EVP_MD *md;
            md = EVP_get_digestbynid(dtype);
            if (md && (EVP_MD_size(md) != sig->digest->length))
                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
            else {
                memcpy(rm, sig->digest->data, sig->digest->length);
                *prm_len = sig->digest->length;
                ret = 1;
            }
        } else if (((unsigned int)sig->digest->length != m_len) ||
                   (memcmp(m, sig->digest->data, m_len) != 0)) {
            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
        } else
            ret = 1;
    }
 err:
    X509_SIG_free(sig);
    OPENSSL_clear_free(s, (unsigned int)siglen);
    return (ret);
}

int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
               const unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
{

    if ((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify) {
        return rsa->meth->rsa_verify(dtype, m, m_len, sigbuf, siglen, rsa);
    }

    return int_rsa_verify(dtype, m, m_len, NULL, NULL, sigbuf, siglen, rsa);
}
Commit	Line	Data
d02b48c6	1	/* crypto/rsa/rsa_sign.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.
0f113f3e	8	*
d02b48c6 RE	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).
0f113f3e	15	*
d02b48c6 RE	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.
0f113f3e	22	*
d02b48c6 RE	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 :-).
0f113f3e	37	* 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6 RE	38	* the apps directory (application code) you must include an acknowledgement:
d02b48c6 RE	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
0f113f3e	40	*
d02b48c6 RE	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.
0f113f3e	52	*
d02b48c6 RE	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"
ec577822 BM	61	#include <openssl/bn.h>
	62	#include <openssl/rsa.h>
	63	#include <openssl/objects.h>
	64	#include <openssl/x509.h>
777c47ac	65	#include "rsa_locl.h"
d02b48c6	66
1c80019a	67	/* Size of an SSL signature: MD5+SHA1 */
0f113f3e	68	#define SSL_SIG_LENGTH 36
1c80019a	69
29c1f061	70	int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
0f113f3e MC	71	unsigned char sigret, unsigned int siglen, RSA *rsa)
	72	{
	73	X509_SIG sig;
	74	ASN1_TYPE parameter;
	75	int i, j, ret = 1;
	76	unsigned char p, tmps = NULL;
	77	const unsigned char *s = NULL;
	78	X509_ALGOR algor;
	79	ASN1_OCTET_STRING digest;
	80	if ((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign) {
	81	return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa);
	82	}
	83	/* Special case: SSL signature, just check the length */
	84	if (type == NID_md5_sha1) {
	85	if (m_len != SSL_SIG_LENGTH) {
	86	RSAerr(RSA_F_RSA_SIGN, RSA_R_INVALID_MESSAGE_LENGTH);
	87	return (0);
	88	}
	89	i = SSL_SIG_LENGTH;
	90	s = m;
	91	} else {
	92	sig.algor = &algor;
	93	sig.algor->algorithm = OBJ_nid2obj(type);
	94	if (sig.algor->algorithm == NULL) {
	95	RSAerr(RSA_F_RSA_SIGN, RSA_R_UNKNOWN_ALGORITHM_TYPE);
	96	return (0);
	97	}
2e430277	98	if (OBJ_length(sig.algor->algorithm) == 0) {
0f113f3e MC	99	RSAerr(RSA_F_RSA_SIGN,
	100	RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
	101	return (0);
	102	}
	103	parameter.type = V_ASN1_NULL;
	104	parameter.value.ptr = NULL;
	105	sig.algor->parameter = &parameter;
d02b48c6	106
0f113f3e MC	107	sig.digest = &digest;
	108	sig.digest->data = (unsigned char )m; / TMP UGLY CAST */
	109	sig.digest->length = m_len;
d02b48c6	110
0f113f3e MC	111	i = i2d_X509_SIG(&sig, NULL);
	112	}
	113	j = RSA_size(rsa);
	114	if (i > (j - RSA_PKCS1_PADDING_SIZE)) {
	115	RSAerr(RSA_F_RSA_SIGN, RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
	116	return (0);
	117	}
	118	if (type != NID_md5_sha1) {
b196e7d9	119	tmps = OPENSSL_malloc((unsigned int)j + 1);
0f113f3e MC	120	if (tmps == NULL) {
	121	RSAerr(RSA_F_RSA_SIGN, ERR_R_MALLOC_FAILURE);
	122	return (0);
	123	}
	124	p = tmps;
	125	i2d_X509_SIG(&sig, &p);
	126	s = tmps;
	127	}
	128	i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING);
	129	if (i <= 0)
	130	ret = 0;
	131	else
	132	*siglen = i;
d02b48c6	133
4b45c6e5 RS	134	if (type != NID_md5_sha1)
4b45c6e5 RS	135	OPENSSL_clear_free(tmps, (unsigned int)j + 1);
0f113f3e MC	136	return (ret);
0f113f3e MC	137	}
d02b48c6	138
1cfd255c DSH	139	/*
1cfd255c DSH	140	* Check DigestInfo structure does not contain extraneous data by reencoding
0f113f3e	141	* using DER and checking encoding against original.
1cfd255c	142	*/
0f113f3e MC	143	static int rsa_check_digestinfo(X509_SIG sig, const unsigned char dinfo,
	144	int dinfolen)
	145	{
	146	unsigned char *der = NULL;
	147	int derlen;
	148	int ret = 0;
	149	derlen = i2d_X509_SIG(sig, &der);
	150	if (derlen <= 0)
	151	return 0;
	152	if (derlen == dinfolen && !memcmp(dinfo, der, derlen))
	153	ret = 1;
4b45c6e5	154	OPENSSL_clear_free(der, derlen);
0f113f3e MC	155	return ret;
0f113f3e MC	156	}
1cfd255c	157
777c47ac	158	int int_rsa_verify(int dtype, const unsigned char *m,
0f113f3e MC	159	unsigned int m_len,
	160	unsigned char rm, size_t prm_len,
	161	const unsigned char sigbuf, size_t siglen, RSA rsa)
	162	{
	163	int i, ret = 0, sigtype;
	164	unsigned char *s;
	165	X509_SIG *sig = NULL;
d02b48c6	166
0f113f3e MC	167	if (siglen != (unsigned int)RSA_size(rsa)) {
	168	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_WRONG_SIGNATURE_LENGTH);
	169	return (0);
	170	}
1c80019a	171
0f113f3e MC	172	if ((dtype == NID_md5_sha1) && rm) {
	173	i = RSA_public_decrypt((int)siglen,
	174	sigbuf, rm, rsa, RSA_PKCS1_PADDING);
	175	if (i <= 0)
	176	return 0;
	177	*prm_len = i;
	178	return 1;
	179	}
d02b48c6	180
b196e7d9	181	s = OPENSSL_malloc((unsigned int)siglen);
0f113f3e MC	182	if (s == NULL) {
	183	RSAerr(RSA_F_INT_RSA_VERIFY, ERR_R_MALLOC_FAILURE);
	184	goto err;
	185	}
	186	if ((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH)) {
	187	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_MESSAGE_LENGTH);
	188	goto err;
	189	}
	190	i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING);
d02b48c6	191
0f113f3e MC	192	if (i <= 0)
	193	goto err;
	194	/*
	195	* Oddball MDC2 case: signature can be OCTET STRING. check for correct
	196	* tag and length octets.
	197	*/
	198	if (dtype == NID_mdc2 && i == 18 && s[0] == 0x04 && s[1] == 0x10) {
	199	if (rm) {
	200	memcpy(rm, s + 2, 16);
	201	*prm_len = 16;
	202	ret = 1;
	203	} else if (memcmp(m, s + 2, 16))
	204	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
	205	else
	206	ret = 1;
	207	}
dfeab068	208
0f113f3e MC	209	/* Special case: SSL signature */
	210	if (dtype == NID_md5_sha1) {
	211	if ((i != SSL_SIG_LENGTH) \|\| memcmp(s, m, SSL_SIG_LENGTH))
	212	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
	213	else
	214	ret = 1;
	215	} else {
	216	const unsigned char *p = s;
	217	sig = d2i_X509_SIG(NULL, &p, (long)i);
b79aa05e	218
0f113f3e MC	219	if (sig == NULL)
0f113f3e MC	220	goto err;
b79aa05e	221
0f113f3e MC	222	/* Excess data can be used to create forgeries */
	223	if (p != s + i \|\| !rsa_check_digestinfo(sig, s, i)) {
	224	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
	225	goto err;
	226	}
b79aa05e	227
0f113f3e MC	228	/*
	229	* Parameters to the signature algorithm can also be used to create
	230	* forgeries
	231	*/
	232	if (sig->algor->parameter
	233	&& ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL) {
	234	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
	235	goto err;
	236	}
d02b48c6	237
0f113f3e	238	sigtype = OBJ_obj2nid(sig->algor->algorithm);
dfeab068	239
0f113f3e MC	240	#ifdef RSA_DEBUG
	241	/* put a backward compatibility flag in EAY */
	242	fprintf(stderr, "in(%s) expect(%s)\n", OBJ_nid2ln(sigtype),
	243	OBJ_nid2ln(dtype));
	244	#endif
	245	if (sigtype != dtype) {
3d0cf918 RS	246	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_ALGORITHM_MISMATCH);
3d0cf918 RS	247	goto err;
0f113f3e MC	248	}
	249	if (rm) {
	250	const EVP_MD *md;
	251	md = EVP_get_digestbynid(dtype);
	252	if (md && (EVP_MD_size(md) != sig->digest->length))
	253	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
	254	else {
	255	memcpy(rm, sig->digest->data, sig->digest->length);
	256	*prm_len = sig->digest->length;
	257	ret = 1;
	258	}
	259	} else if (((unsigned int)sig->digest->length != m_len) \|\|
	260	(memcmp(m, sig->digest->data, m_len) != 0)) {
	261	RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
	262	} else
	263	ret = 1;
	264	}
	265	err:
222561fe	266	X509_SIG_free(sig);
4b45c6e5	267	OPENSSL_clear_free(s, (unsigned int)siglen);
0f113f3e MC	268	return (ret);
0f113f3e MC	269	}
d02b48c6	270
b2a97be7	271	int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
0f113f3e MC	272	const unsigned char sigbuf, unsigned int siglen, RSA rsa)
0f113f3e MC	273	{
b2a97be7	274
0f113f3e MC	275	if ((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify) {
	276	return rsa->meth->rsa_verify(dtype, m, m_len, sigbuf, siglen, rsa);
	277	}
b2a97be7	278
0f113f3e MC	279	return int_rsa_verify(dtype, m, m_len, NULL, NULL, sigbuf, siglen, rsa);
0f113f3e MC	280	}