diff options
Diffstat (limited to 'openssl/crypto/dh/dh_check.c')
| -rw-r--r-- | openssl/crypto/dh/dh_check.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/openssl/crypto/dh/dh_check.c b/openssl/crypto/dh/dh_check.c deleted file mode 100644 index 06689817..00000000 --- a/openssl/crypto/dh/dh_check.c +++ /dev/null @@ -1,142 +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 *q=NULL; - - *ret=0; - ctx=BN_CTX_new(); - if (ctx == NULL) goto err; - q=BN_new(); - if (q == NULL) goto err; - - 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 (!BN_rshift1(q,dh->p)) goto err; - if (!BN_is_prime_ex(q,BN_prime_checks,ctx,NULL)) - *ret|=DH_CHECK_P_NOT_SAFE_PRIME; - } - ok=1; -err: - if (ctx != NULL) BN_CTX_free(ctx); - if (q != NULL) BN_free(q); - return(ok); - } - -int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) - { - int ok=0; - BIGNUM *q=NULL; - - *ret=0; - q=BN_new(); - if (q == NULL) goto err; - BN_set_word(q,1); - if (BN_cmp(pub_key,q)<=0) - *ret|=DH_CHECK_PUBKEY_TOO_SMALL; - BN_copy(q,dh->p); - BN_sub_word(q,1); - if (BN_cmp(pub_key,q)>=0) - *ret|=DH_CHECK_PUBKEY_TOO_LARGE; - - ok = 1; -err: - if (q != NULL) BN_free(q); - return(ok); - } |