X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh_lib.c;h=6a59f7faa4320a6ee055aa6f95bba371d073428a;hp=12b40cd1a40310f9eadda912204850e736492597;hb=b2b361f6afb55c501bedef664c1fdc0d71a91d4b;hpb=6b691a5c85ddc4e407e32781841fee5c029506cd diff --git a/crypto/dh/dh_lib.c b/crypto/dh/dh_lib.c index 12b40cd1a4..6a59f7faa4 100644 --- a/crypto/dh/dh_lib.c +++ b/crypto/dh/dh_lib.c @@ -1,103 +1,289 @@ -/* crypto/dh/dh_lib.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 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 -#include "cryptlib.h" -#include "bn.h" -#include "dh.h" +#include "internal/cryptlib.h" +#include +#include "dh_locl.h" +#include -const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; +static const DH_METHOD *default_DH_method = NULL; + +void DH_set_default_method(const DH_METHOD *meth) +{ + default_DH_method = meth; +} + +const DH_METHOD *DH_get_default_method(void) +{ + if (!default_DH_method) + default_DH_method = DH_OpenSSL(); + return default_DH_method; +} + +int DH_set_method(DH *dh, const DH_METHOD *meth) +{ + /* + * NB: The caller is specifically setting a method, so it's not up to us + * to deal with which ENGINE it comes from. + */ + const DH_METHOD *mtmp; + mtmp = dh->meth; + if (mtmp->finish) + mtmp->finish(dh); +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(dh->engine); + dh->engine = NULL; +#endif + dh->meth = meth; + if (meth->init) + meth->init(dh); + return 1; +} DH *DH_new(void) - { - DH *ret; - - ret=(DH *)Malloc(sizeof(DH)); - if (ret == NULL) - { - DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); - return(NULL); - } - ret->pad=0; - ret->version=0; - ret->p=NULL; - ret->g=NULL; - ret->length=0; - ret->pub_key=NULL; - ret->priv_key=NULL; - ret->flags=DH_FLAG_CACHE_MONT_P; - ret->method_mont_p=NULL; - return(ret); - } +{ + return DH_new_method(NULL); +} + +DH *DH_new_method(ENGINE *engine) +{ + DH *ret = OPENSSL_zalloc(sizeof(*ret)); + + if (ret == NULL) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->references = 1; + ret->lock = CRYPTO_THREAD_lock_new(); + if (ret->lock == NULL) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); + OPENSSL_free(ret); + return NULL; + } + + ret->meth = DH_get_default_method(); +#ifndef OPENSSL_NO_ENGINE + ret->flags = ret->meth->flags; /* early default init */ + if (engine) { + if (!ENGINE_init(engine)) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + ret->engine = engine; + } else + ret->engine = ENGINE_get_default_DH(); + if (ret->engine) { + ret->meth = ENGINE_get_DH(ret->engine); + if (ret->meth == NULL) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + } +#endif + + ret->flags = ret->meth->flags; + + if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data)) + goto err; + + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_INIT_FAIL); +err: + DH_free(ret); + ret = NULL; + } + + return ret; +} void DH_free(DH *r) - { - if(r == NULL) return; - if (r->p != NULL) BN_clear_free(r->p); - if (r->g != NULL) BN_clear_free(r->g); - if (r->pub_key != NULL) BN_clear_free(r->pub_key); - if (r->priv_key != NULL) BN_clear_free(r->priv_key); - if (r->method_mont_p != NULL) - BN_MONT_CTX_free((BN_MONT_CTX *)r->method_mont_p); - Free(r); - } - -int DH_size(DH *dh) - { - return(BN_num_bytes(dh->p)); - } +{ + int i; + + if (r == NULL) + return; + + CRYPTO_atomic_add(&r->references, -1, &i, r->lock); + REF_PRINT_COUNT("DH", r); + if (i > 0) + return; + REF_ASSERT_ISNT(i < 0); + + if (r->meth->finish) + r->meth->finish(r); +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(r->engine); +#endif + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); + + CRYPTO_THREAD_lock_free(r->lock); + + BN_clear_free(r->p); + BN_clear_free(r->g); + BN_clear_free(r->q); + BN_clear_free(r->j); + OPENSSL_free(r->seed); + BN_clear_free(r->counter); + BN_clear_free(r->pub_key); + BN_clear_free(r->priv_key); + OPENSSL_free(r); +} + +int DH_up_ref(DH *r) +{ + int i; + + if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0) + return 0; + + REF_PRINT_COUNT("DH", r); + REF_ASSERT_ISNT(i < 2); + return ((i > 1) ? 1 : 0); +} + +int DH_set_ex_data(DH *d, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&d->ex_data, idx, arg)); +} + +void *DH_get_ex_data(DH *d, int idx) +{ + return (CRYPTO_get_ex_data(&d->ex_data, idx)); +} + +int DH_bits(const DH *dh) +{ + return BN_num_bits(dh->p); +} + +int DH_size(const DH *dh) +{ + return (BN_num_bytes(dh->p)); +} + +int DH_security_bits(const DH *dh) +{ + int N; + if (dh->q) + N = BN_num_bits(dh->q); + else if (dh->length) + N = dh->length; + else + N = -1; + return BN_security_bits(BN_num_bits(dh->p), N); +} + + +void DH_get0_pqg(const DH *dh, BIGNUM **p, BIGNUM **q, BIGNUM **g) +{ + if (p != NULL) + *p = dh->p; + if (q != NULL) + *q = dh->q; + if (g != NULL) + *g = dh->g; +} + +int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g) +{ + /* If the fields p and g in d are NULL, the corresponding input + * parameters MUST be non-NULL. q may remain NULL. + * + * It is an error to give the results from get0 on d + * as input parameters. + */ + if (p == dh->p || (dh->q != NULL && q == dh->q) || g == dh->g) + return 0; + + if (p != NULL) { + BN_free(dh->p); + dh->p = p; + } + if (q != NULL) { + BN_free(dh->q); + dh->q = q; + } + if (g != NULL) { + BN_free(dh->g); + dh->g = g; + } + + if (q != NULL) { + dh->length = BN_num_bits(q); + } + + return 1; +} + +long DH_get_length(const DH *dh) +{ + return dh->length; +} + +int DH_set_length(DH *dh, long length) +{ + dh->length = length; + return 1; +} + +void DH_get0_key(const DH *dh, BIGNUM **pub_key, BIGNUM **priv_key) +{ + if (pub_key != NULL) + *pub_key = dh->pub_key; + if (priv_key != NULL) + *priv_key = dh->priv_key; +} + +int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key) +{ + /* If the pub_key in dh is NULL, the corresponding input + * parameters MUST be non-NULL. The priv_key field may + * be left NULL. + * + * It is an error to give the results from get0 on dh + * as input parameters. + */ + if (dh->pub_key == pub_key + || (dh->priv_key != NULL && priv_key == dh->priv_key)) + return 0; + + if (pub_key != NULL) { + BN_free(dh->pub_key); + dh->pub_key = pub_key; + } + if (priv_key != NULL) { + BN_free(dh->priv_key); + dh->priv_key = priv_key; + } + + return 1; +} + +void DH_clear_flags(DH *dh, int flags) +{ + dh->flags &= ~flags; +} + +int DH_test_flags(const DH *dh, int flags) +{ + return dh->flags & flags; +} + +void DH_set_flags(DH *dh, int flags) +{ + dh->flags |= flags; +} + +ENGINE *DH_get0_engine(DH *dh) +{ + return dh->engine; +}