mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
26a7d938c9
Since return is inconsistent, I removed unnecessary parentheses and unified them. Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4541)
156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/*
|
|
* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#include "dsa_locl.h"
|
|
#include <openssl/asn1.h>
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/rand.h>
|
|
|
|
ASN1_SEQUENCE(DSA_SIG) = {
|
|
ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
|
|
ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
|
|
} static_ASN1_SEQUENCE_END(DSA_SIG)
|
|
|
|
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA_SIG, DSA_SIG, DSA_SIG)
|
|
|
|
DSA_SIG *DSA_SIG_new(void)
|
|
{
|
|
DSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig));
|
|
if (sig == NULL)
|
|
DSAerr(DSA_F_DSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
|
|
return sig;
|
|
}
|
|
|
|
void DSA_SIG_free(DSA_SIG *sig)
|
|
{
|
|
if (sig == NULL)
|
|
return;
|
|
BN_clear_free(sig->r);
|
|
BN_clear_free(sig->s);
|
|
OPENSSL_free(sig);
|
|
}
|
|
|
|
void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
|
|
{
|
|
if (pr != NULL)
|
|
*pr = sig->r;
|
|
if (ps != NULL)
|
|
*ps = sig->s;
|
|
}
|
|
|
|
int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s)
|
|
{
|
|
if (r == NULL || s == NULL)
|
|
return 0;
|
|
BN_clear_free(sig->r);
|
|
BN_clear_free(sig->s);
|
|
sig->r = r;
|
|
sig->s = s;
|
|
return 1;
|
|
}
|
|
|
|
/* Override the default free and new methods */
|
|
static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
|
|
void *exarg)
|
|
{
|
|
if (operation == ASN1_OP_NEW_PRE) {
|
|
*pval = (ASN1_VALUE *)DSA_new();
|
|
if (*pval != NULL)
|
|
return 2;
|
|
return 0;
|
|
} else if (operation == ASN1_OP_FREE_PRE) {
|
|
DSA_free((DSA *)*pval);
|
|
*pval = NULL;
|
|
return 2;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = {
|
|
ASN1_EMBED(DSA, version, INT32),
|
|
ASN1_SIMPLE(DSA, p, BIGNUM),
|
|
ASN1_SIMPLE(DSA, q, BIGNUM),
|
|
ASN1_SIMPLE(DSA, g, BIGNUM),
|
|
ASN1_SIMPLE(DSA, pub_key, BIGNUM),
|
|
ASN1_SIMPLE(DSA, priv_key, CBIGNUM)
|
|
} static_ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey)
|
|
|
|
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey)
|
|
|
|
ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = {
|
|
ASN1_SIMPLE(DSA, p, BIGNUM),
|
|
ASN1_SIMPLE(DSA, q, BIGNUM),
|
|
ASN1_SIMPLE(DSA, g, BIGNUM),
|
|
} static_ASN1_SEQUENCE_END_cb(DSA, DSAparams)
|
|
|
|
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams)
|
|
|
|
ASN1_SEQUENCE_cb(DSAPublicKey, dsa_cb) = {
|
|
ASN1_SIMPLE(DSA, pub_key, BIGNUM),
|
|
ASN1_SIMPLE(DSA, p, BIGNUM),
|
|
ASN1_SIMPLE(DSA, q, BIGNUM),
|
|
ASN1_SIMPLE(DSA, g, BIGNUM)
|
|
} static_ASN1_SEQUENCE_END_cb(DSA, DSAPublicKey)
|
|
|
|
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey)
|
|
|
|
DSA *DSAparams_dup(DSA *dsa)
|
|
{
|
|
return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa);
|
|
}
|
|
|
|
int DSA_sign(int type, const unsigned char *dgst, int dlen,
|
|
unsigned char *sig, unsigned int *siglen, DSA *dsa)
|
|
{
|
|
DSA_SIG *s;
|
|
|
|
s = DSA_do_sign(dgst, dlen, dsa);
|
|
if (s == NULL) {
|
|
*siglen = 0;
|
|
return 0;
|
|
}
|
|
*siglen = i2d_DSA_SIG(s, &sig);
|
|
DSA_SIG_free(s);
|
|
return 1;
|
|
}
|
|
|
|
/* data has already been hashed (probably with SHA or SHA-1). */
|
|
/*-
|
|
* returns
|
|
* 1: correct signature
|
|
* 0: incorrect signature
|
|
* -1: error
|
|
*/
|
|
int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
|
|
const unsigned char *sigbuf, int siglen, DSA *dsa)
|
|
{
|
|
DSA_SIG *s;
|
|
const unsigned char *p = sigbuf;
|
|
unsigned char *der = NULL;
|
|
int derlen = -1;
|
|
int ret = -1;
|
|
|
|
s = DSA_SIG_new();
|
|
if (s == NULL)
|
|
return ret;
|
|
if (d2i_DSA_SIG(&s, &p, siglen) == NULL)
|
|
goto err;
|
|
/* Ensure signature uses DER and doesn't have trailing garbage */
|
|
derlen = i2d_DSA_SIG(s, &der);
|
|
if (derlen != siglen || memcmp(sigbuf, der, derlen))
|
|
goto err;
|
|
ret = DSA_do_verify(dgst, dgst_len, s, dsa);
|
|
err:
|
|
OPENSSL_clear_free(der, derlen);
|
|
DSA_SIG_free(s);
|
|
return ret;
|
|
}
|