-/* dsa_asn1.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2000.
- */
-/* ====================================================================
- * Copyright (c) 2000-2005 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * 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 "cryptlib.h"
-#include <openssl/dsa.h>
+#include "internal/cryptlib.h"
+#include "dsa_locl.h"
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/rand.h>
-/* Override the default new methods */
-static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
- void *exarg)
+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)
{
- if(operation == ASN1_OP_NEW_PRE) {
- DSA_SIG *sig;
- sig = OPENSSL_malloc(sizeof(DSA_SIG));
- if (!sig)
- {
- DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- sig->r = NULL;
- sig->s = NULL;
- *pval = (ASN1_VALUE *)sig;
- return 2;
- }
- return 1;
+ DSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig));
+ if (sig == NULL)
+ DSAerr(DSA_F_DSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
+ return sig;
}
-ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = {
- ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
- ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
-} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_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);
+}
-IMPLEMENT_ASN1_FUNCTIONS_const(DSA_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)
+ void *exarg)
{
- if(operation == ASN1_OP_NEW_PRE) {
- *pval = (ASN1_VALUE *)DSA_new();
- if(*pval) return 2;
- return 0;
- } else if(operation == ASN1_OP_FREE_PRE) {
- DSA_free((DSA *)*pval);
- *pval = NULL;
- return 2;
- }
- return 1;
+ 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_SIMPLE(DSA, version, LONG),
- 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, BIGNUM)
-} ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey)
+ 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),
-} ASN1_SEQUENCE_END_cb(DSA, DSAparams)
+ 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)
-/* DSA public key is a bit trickier... its effectively a CHOICE type
- * decided by a field called write_params which can either write out
- * just the public key as an INTEGER or the parameters and public key
- * in a SEQUENCE
- */
-
-ASN1_SEQUENCE(dsa_pub_internal) = {
- ASN1_SIMPLE(DSA, pub_key, BIGNUM),
- ASN1_SIMPLE(DSA, p, BIGNUM),
- ASN1_SIMPLE(DSA, q, BIGNUM),
- ASN1_SIMPLE(DSA, g, BIGNUM)
-} ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal)
-
-ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = {
- ASN1_SIMPLE(DSA, pub_key, BIGNUM),
- ASN1_EX_COMBINE(0, 0, dsa_pub_internal)
-} ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params)
+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;
- RAND_seed(dgst, dlen);
- 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);
- }
+{
+ 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;
+ RAND_seed(dgst, dlen);
+ 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
+/*-
+ * 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;
- int ret=-1;
-
- s = DSA_SIG_new();
- if (s == NULL) return(ret);
- if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
- ret=DSA_do_verify(dgst,dgst_len,s,dsa);
-err:
- DSA_SIG_free(s);
- return(ret);
- }
+ 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);
+}
projects / openssl.git / blobdiff