-/* crypto/dsa/dsa_gen.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.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * 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.]
+ * 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
*/
/*
*/
#define xxxHASH EVP_sha1()
-#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_SHA is defined */
-
+#include <openssl/opensslconf.h>
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
-
#include "dsa_locl.h"
int DSA_generate_parameters_ex(DSA *ret, int bits,
return ret->meth->dsa_paramgen(ret, bits, seed_in, seed_len,
counter_ret, h_ret, cb);
else {
- const EVP_MD *evpmd;
- size_t qbits = bits >= 2048 ? 256 : 160;
-
- if (bits >= 2048) {
- qbits = 256;
- evpmd = EVP_sha256();
- } else {
- qbits = 160;
- evpmd = EVP_sha1();
- }
+ const EVP_MD *evpmd = bits >= 2048 ? EVP_sha256() : EVP_sha1();
+ size_t qbits = EVP_MD_size(evpmd) * 8;
return dsa_builtin_paramgen(ret, bits, qbits, evpmd,
seed_in, seed_len, NULL, counter_ret,
bits = (bits + 63) / 64 * 64;
if (seed_in != NULL) {
- if (seed_len < (size_t)qsize)
+ if (seed_len < (size_t)qsize) {
+ DSAerr(DSA_F_DSA_BUILTIN_PARAMGEN, DSA_R_SEED_LEN_SMALL);
return 0;
+ }
if (seed_len > (size_t)qsize) {
/* Only consume as much seed as is expected. */
seed_len = qsize;
memcpy(seed, seed_in, seed_len);
}
+ if ((mont = BN_MONT_CTX_new()) == NULL)
+ goto err;
+
if ((ctx = BN_CTX_new()) == NULL)
goto err;
BN_CTX_start(ctx);
- if ((mont = BN_MONT_CTX_new()) == NULL)
- goto err;
-
r0 = BN_CTX_get(ctx);
g = BN_CTX_get(ctx);
W = BN_CTX_get(ctx);
p = BN_CTX_get(ctx);
test = BN_CTX_get(ctx);
+ if (test == NULL)
+ goto err;
+
if (!BN_lshift(test, BN_value_one(), bits - 1))
goto err;
int counter = 0;
int r = 0;
BN_CTX *ctx = NULL;
- EVP_MD_CTX mctx;
+ EVP_MD_CTX *mctx = EVP_MD_CTX_new();
unsigned int h = 2;
- EVP_MD_CTX_init(&mctx);
+ if (mctx == NULL)
+ goto err;
if (evpmd == NULL) {
if (N == 160)
evpmd = EVP_sha256();
}
- mdsize = M_EVP_MD_size(evpmd);
- /* If unverificable g generation only don't need seed */
+ mdsize = EVP_MD_size(evpmd);
+ /* If unverifiable g generation only don't need seed */
if (!ret->p || !ret->q || idx >= 0) {
if (seed_len == 0)
seed_len = mdsize;
else
seed_tmp = OPENSSL_malloc(seed_len);
- if (!seed || !seed_tmp)
+ if (seed == NULL || seed_tmp == NULL)
goto err;
if (seed_in)
X = BN_CTX_get(ctx);
c = BN_CTX_get(ctx);
test = BN_CTX_get(ctx);
+ if (test == NULL)
+ goto err;
/* if p, q already supplied generate g only */
if (ret->p && ret->q) {
md[0] = idx & 0xff;
md[1] = (h >> 8) & 0xff;
md[2] = h & 0xff;
- if (!EVP_DigestInit_ex(&mctx, evpmd, NULL))
+ if (!EVP_DigestInit_ex(mctx, evpmd, NULL))
goto err;
- if (!EVP_DigestUpdate(&mctx, seed_tmp, seed_len))
+ if (!EVP_DigestUpdate(mctx, seed_tmp, seed_len))
goto err;
- if (!EVP_DigestUpdate(&mctx, ggen, sizeof(ggen)))
+ if (!EVP_DigestUpdate(mctx, ggen, sizeof(ggen)))
goto err;
- if (!EVP_DigestUpdate(&mctx, md, 3))
+ if (!EVP_DigestUpdate(mctx, md, 3))
goto err;
- if (!EVP_DigestFinal_ex(&mctx, md, NULL))
+ if (!EVP_DigestFinal_ex(mctx, md, NULL))
goto err;
if (!BN_bin2bn(md, mdsize, test))
goto err;
BN_CTX_end(ctx);
BN_CTX_free(ctx);
BN_MONT_CTX_free(mont);
- EVP_MD_CTX_cleanup(&mctx);
+ EVP_MD_CTX_free(mctx);
return ok;
}
-
-int dsa_paramgen_check_g(DSA *dsa)
-{
- BN_CTX *ctx;
- BIGNUM *tmp;
- BN_MONT_CTX *mont = NULL;
- int rv = -1;
- ctx = BN_CTX_new();
- if (!ctx)
- return -1;
- BN_CTX_start(ctx);
- if (BN_cmp(dsa->g, BN_value_one()) <= 0)
- return 0;
- if (BN_cmp(dsa->g, dsa->p) >= 0)
- return 0;
- tmp = BN_CTX_get(ctx);
- if (!tmp)
- goto err;
- if ((mont = BN_MONT_CTX_new()) == NULL)
- goto err;
- if (!BN_MONT_CTX_set(mont, dsa->p, ctx))
- goto err;
- /* Work out g^q mod p */
- if (!BN_mod_exp_mont(tmp, dsa->g, dsa->q, dsa->p, ctx, mont))
- goto err;
- if (!BN_cmp(tmp, BN_value_one()))
- rv = 1;
- else
- rv = 0;
- err:
- BN_CTX_end(ctx);
- BN_MONT_CTX_free(mont);
- BN_CTX_free(ctx);
- return rv;
-
-}
projects / openssl.git / blobdiff