summaryrefslogtreecommitdiff
path: root/thirdparty/openssl/crypto/dh/dh_check.c
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/openssl/crypto/dh/dh_check.c')
-rw-r--r--thirdparty/openssl/crypto/dh/dh_check.c187
1 files changed, 0 insertions, 187 deletions
diff --git a/thirdparty/openssl/crypto/dh/dh_check.c b/thirdparty/openssl/crypto/dh/dh_check.c
deleted file mode 100644
index 0277041114..0000000000
--- a/thirdparty/openssl/crypto/dh/dh_check.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/* crypto/dh/dh_check.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/dh.h>
-
-/*-
- * Check that p is a safe prime and
- * if g is 2, 3 or 5, check that it is a suitable generator
- * where
- * for 2, p mod 24 == 11
- * for 3, p mod 12 == 5
- * for 5, p mod 10 == 3 or 7
- * should hold.
- */
-
-int DH_check(const DH *dh, int *ret)
-{
- int ok = 0;
- BN_CTX *ctx = NULL;
- BN_ULONG l;
- BIGNUM *t1 = NULL, *t2 = NULL;
-
- *ret = 0;
- ctx = BN_CTX_new();
- if (ctx == NULL)
- goto err;
- BN_CTX_start(ctx);
- t1 = BN_CTX_get(ctx);
- if (t1 == NULL)
- goto err;
- t2 = BN_CTX_get(ctx);
- if (t2 == NULL)
- goto err;
-
- if (dh->q) {
- if (BN_cmp(dh->g, BN_value_one()) <= 0)
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- else if (BN_cmp(dh->g, dh->p) >= 0)
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- else {
- /* Check g^q == 1 mod p */
- if (!BN_mod_exp(t1, dh->g, dh->q, dh->p, ctx))
- goto err;
- if (!BN_is_one(t1))
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- }
- if (!BN_is_prime_ex(dh->q, BN_prime_checks, ctx, NULL))
- *ret |= DH_CHECK_Q_NOT_PRIME;
- /* Check p == 1 mod q i.e. q divides p - 1 */
- if (!BN_div(t1, t2, dh->p, dh->q, ctx))
- goto err;
- if (!BN_is_one(t2))
- *ret |= DH_CHECK_INVALID_Q_VALUE;
- if (dh->j && BN_cmp(dh->j, t1))
- *ret |= DH_CHECK_INVALID_J_VALUE;
-
- } else if (BN_is_word(dh->g, DH_GENERATOR_2)) {
- l = BN_mod_word(dh->p, 24);
- if (l != 11)
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- }
-#if 0
- else if (BN_is_word(dh->g, DH_GENERATOR_3)) {
- l = BN_mod_word(dh->p, 12);
- if (l != 5)
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- }
-#endif
- else if (BN_is_word(dh->g, DH_GENERATOR_5)) {
- l = BN_mod_word(dh->p, 10);
- if ((l != 3) && (l != 7))
- *ret |= DH_NOT_SUITABLE_GENERATOR;
- } else
- *ret |= DH_UNABLE_TO_CHECK_GENERATOR;
-
- if (!BN_is_prime_ex(dh->p, BN_prime_checks, ctx, NULL))
- *ret |= DH_CHECK_P_NOT_PRIME;
- else if (!dh->q) {
- if (!BN_rshift1(t1, dh->p))
- goto err;
- if (!BN_is_prime_ex(t1, BN_prime_checks, ctx, NULL))
- *ret |= DH_CHECK_P_NOT_SAFE_PRIME;
- }
- ok = 1;
- err:
- if (ctx != NULL) {
- BN_CTX_end(ctx);
- BN_CTX_free(ctx);
- }
- return (ok);
-}
-
-int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret)
-{
- int ok = 0;
- BIGNUM *tmp = NULL;
- BN_CTX *ctx = NULL;
-
- *ret = 0;
- ctx = BN_CTX_new();
- if (ctx == NULL)
- goto err;
- BN_CTX_start(ctx);
- tmp = BN_CTX_get(ctx);
- if (tmp == NULL || !BN_set_word(tmp, 1))
- goto err;
- if (BN_cmp(pub_key, tmp) <= 0)
- *ret |= DH_CHECK_PUBKEY_TOO_SMALL;
- if (BN_copy(tmp, dh->p) == NULL || !BN_sub_word(tmp, 1))
- goto err;
- if (BN_cmp(pub_key, tmp) >= 0)
- *ret |= DH_CHECK_PUBKEY_TOO_LARGE;
-
- if (dh->q != NULL) {
- /* Check pub_key^q == 1 mod p */
- if (!BN_mod_exp(tmp, pub_key, dh->q, dh->p, ctx))
- goto err;
- if (!BN_is_one(tmp))
- *ret |= DH_CHECK_PUBKEY_INVALID;
- }
-
- ok = 1;
- err:
- if (ctx != NULL) {
- BN_CTX_end(ctx);
- BN_CTX_free(ctx);
- }
- return (ok);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 10:58:54 +0000