diff options
Diffstat (limited to 'freebsd/crypto/openssl/crypto/dh/dh_check.c')
| -rw-r--r-- | freebsd/crypto/openssl/crypto/dh/dh_check.c | 194 |
1 files changed, 120 insertions, 74 deletions
diff --git a/freebsd/crypto/openssl/crypto/dh/dh_check.c b/freebsd/crypto/openssl/crypto/dh/dh_check.c index cfb4faa6..ff5d8f81 100644 --- a/freebsd/crypto/openssl/crypto/dh/dh_check.c +++ b/freebsd/crypto/openssl/crypto/dh/dh_check.c @@ -1,67 +1,71 @@ #include <machine/rtems-bsd-user-space.h> -/* crypto/dh/dh_check.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2017 The OpenSSL Project Authors. 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.] + * 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 "internal/cryptlib.h" #include <openssl/bn.h> -#include <openssl/dh.h> +#include "dh_locl.h" + +/*- + * Check that p and g are suitable enough + * + * p is odd + * 1 < g < p - 1 + */ +int DH_check_params_ex(const DH *dh) +{ + int errflags = 0; + + (void)DH_check_params(dh, &errflags); + + if ((errflags & DH_CHECK_P_NOT_PRIME) != 0) + DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_CHECK_P_NOT_PRIME); + if ((errflags & DH_NOT_SUITABLE_GENERATOR) != 0) + DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_NOT_SUITABLE_GENERATOR); + + return errflags == 0; +} + +int DH_check_params(const DH *dh, 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) + goto err; + + if (!BN_is_odd(dh->p)) + *ret |= DH_CHECK_P_NOT_PRIME; + if (BN_is_negative(dh->g) || BN_is_zero(dh->g) || BN_is_one(dh->g)) + *ret |= DH_NOT_SUITABLE_GENERATOR; + if (BN_copy(tmp, dh->p) == NULL || !BN_sub_word(tmp, 1)) + goto err; + if (BN_cmp(dh->g, tmp) >= 0) + *ret |= DH_NOT_SUITABLE_GENERATOR; + + ok = 1; + err: + if (ctx != NULL) { + BN_CTX_end(ctx); + BN_CTX_free(ctx); + } + return ok; +} /*- * Check that p is a safe prime and @@ -72,10 +76,33 @@ * for 5, p mod 10 == 3 or 7 * should hold. */ +int DH_check_ex(const DH *dh) +{ + int errflags = 0; + + (void)DH_check(dh, &errflags); + + if ((errflags & DH_NOT_SUITABLE_GENERATOR) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_NOT_SUITABLE_GENERATOR); + if ((errflags & DH_CHECK_Q_NOT_PRIME) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_Q_NOT_PRIME); + if ((errflags & DH_CHECK_INVALID_Q_VALUE) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_INVALID_Q_VALUE); + if ((errflags & DH_CHECK_INVALID_J_VALUE) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_INVALID_J_VALUE); + if ((errflags & DH_UNABLE_TO_CHECK_GENERATOR) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_UNABLE_TO_CHECK_GENERATOR); + if ((errflags & DH_CHECK_P_NOT_PRIME) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_P_NOT_PRIME); + if ((errflags & DH_CHECK_P_NOT_SAFE_PRIME) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_P_NOT_SAFE_PRIME); + + return errflags == 0; +} int DH_check(const DH *dh, int *ret) { - int ok = 0; + int ok = 0, r; BN_CTX *ctx = NULL; BN_ULONG l; BIGNUM *t1 = NULL, *t2 = NULL; @@ -86,8 +113,6 @@ int DH_check(const DH *dh, int *ret) 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; @@ -104,7 +129,10 @@ int DH_check(const DH *dh, int *ret) if (!BN_is_one(t1)) *ret |= DH_NOT_SUITABLE_GENERATOR; } - if (!BN_is_prime_ex(dh->q, BN_prime_checks, ctx, NULL)) + r = BN_is_prime_ex(dh->q, BN_prime_checks, ctx, NULL); + if (r < 0) + goto err; + if (!r) *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)) @@ -116,29 +144,31 @@ int DH_check(const DH *dh, int *ret) } else if (BN_is_word(dh->g, DH_GENERATOR_2)) { l = BN_mod_word(dh->p, 24); + if (l == (BN_ULONG)-1) + goto err; 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)) { + } else if (BN_is_word(dh->g, DH_GENERATOR_5)) { l = BN_mod_word(dh->p, 10); + if (l == (BN_ULONG)-1) + goto err; 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)) + r = BN_is_prime_ex(dh->p, BN_prime_checks, ctx, NULL); + if (r < 0) + goto err; + if (!r) *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)) + r = BN_is_prime_ex(t1, BN_prime_checks, ctx, NULL); + if (r < 0) + goto err; + if (!r) *ret |= DH_CHECK_P_NOT_SAFE_PRIME; } ok = 1; @@ -147,7 +177,23 @@ int DH_check(const DH *dh, int *ret) BN_CTX_end(ctx); BN_CTX_free(ctx); } - return (ok); + return ok; +} + +int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key) +{ + int errflags = 0; + + (void)DH_check(dh, &errflags); + + if ((errflags & DH_CHECK_PUBKEY_TOO_SMALL) != 0) + DHerr(DH_F_DH_CHECK_PUB_KEY_EX, DH_R_CHECK_PUBKEY_TOO_SMALL); + if ((errflags & DH_CHECK_PUBKEY_TOO_LARGE) != 0) + DHerr(DH_F_DH_CHECK_PUB_KEY_EX, DH_R_CHECK_PUBKEY_TOO_LARGE); + if ((errflags & DH_CHECK_PUBKEY_INVALID) != 0) + DHerr(DH_F_DH_CHECK_PUB_KEY_EX, DH_R_CHECK_PUBKEY_INVALID); + + return errflags == 0; } int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) @@ -185,5 +231,5 @@ int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) BN_CTX_end(ctx); BN_CTX_free(ctx); } - return (ok); + return ok; } |