X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh_lib.c;h=f22bcf07062b457585505962e86065225a7946a5;hp=b3c609e8be08127014384e323b3b41438047556a;hb=367c55279016527515b237aeaae71bddb82ed316;hpb=7ae551fd03b447e41d3a74e803a711350383ebc4 diff --git a/crypto/dh/dh_lib.c b/crypto/dh/dh_lib.c index b3c609e8be..f22bcf0706 100644 --- a/crypto/dh/dh_lib.c +++ b/crypto/dh/dh_lib.c @@ -1,238 +1,270 @@ -/* 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 "internal/cryptlib.h" #include -#include +#include "dh_locl.h" #include -const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; - -static const DH_METHOD *default_DH_method; -static int dh_meth_num = 0; -static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL; - -void DH_set_default_openssl_method(const DH_METHOD *meth) -{ - ENGINE *e; - /* We'll need to notify the "openssl" ENGINE of this - * change too. We won't bother locking things down at - * our end as there was never any locking in these - * functions! */ - if(default_DH_method != meth) - { - default_DH_method = meth; - e = ENGINE_by_id("openssl"); - if(e) - { - ENGINE_set_DH(e, meth); - ENGINE_free(e); - } - } -} - -const DH_METHOD *DH_get_default_openssl_method(void) -{ - if(!default_DH_method) default_DH_method = DH_OpenSSL(); - return default_DH_method; -} - -#if 0 -DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth) -{ - DH_METHOD *mtmp; - mtmp = dh->meth; - if (mtmp->finish) mtmp->finish(dh); - dh->meth = meth; - if (meth->init) meth->init(dh); - return mtmp; -} -#else -int DH_set_method(DH *dh, ENGINE *engine) -{ - ENGINE *mtmp; - const DH_METHOD *meth; - mtmp = dh->engine; - meth = ENGINE_get_DH(mtmp); - if (!ENGINE_init(engine)) - return 0; - if (meth->finish) meth->finish(dh); - dh->engine= engine; - meth = ENGINE_get_DH(engine); - if (meth->init) meth->init(dh); - /* SHOULD ERROR CHECK THIS!!! */ - ENGINE_finish(mtmp); - return 1; -} +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) { - return DH_new_method(NULL); + return DH_new_method(NULL); } -#if 0 -DH *DH_new_method(DH_METHOD *meth) -#else 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 - { - const DH_METHOD *meth; - DH *ret; - ret=(DH *)OPENSSL_malloc(sizeof(DH)); - - if (ret == NULL) - { - DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); - return(NULL); - } - if(engine) - ret->engine = engine; - else - { - if((ret->engine=ENGINE_get_default_DH()) == NULL) - { - DHerr(DH_F_DH_NEW,ERR_LIB_ENGINE); - OPENSSL_free(ret); - return NULL; - } - } - meth = ENGINE_get_DH(ret->engine); - ret->pad=0; - ret->version=0; - ret->p=NULL; - ret->g=NULL; - ret->length=0; - ret->pub_key=NULL; - ret->priv_key=NULL; - ret->q=NULL; - ret->j=NULL; - ret->seed = NULL; - ret->seedlen = 0; - ret->counter = NULL; - ret->method_mont_p=NULL; - ret->references = 1; - ret->flags=meth->flags; - CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data); - if ((meth->init != NULL) && !meth->init(ret)) - { - CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data); - OPENSSL_free(ret); - ret=NULL; - } - return(ret); - } + + 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) - { - const DH_METHOD *meth; - int i; - if(r == NULL) return; - i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); -#ifdef REF_PRINT - REF_PRINT("DH",r); -#endif - if (i > 0) return; -#ifdef REF_CHECK - if (i < 0) - { - fprintf(stderr,"DH_free, bad reference count\n"); - abort(); - } +{ + int i; + + if (r == NULL) + return; + + CRYPTO_DOWN_REF(&r->references, &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 - meth = ENGINE_get_DH(r->engine); - if(meth->finish) meth->finish(r); - ENGINE_finish(r->engine); - - CRYPTO_free_ex_data(dh_meth, r, &r->ex_data); - - if (r->p != NULL) BN_clear_free(r->p); - if (r->g != NULL) BN_clear_free(r->g); - if (r->q != NULL) BN_clear_free(r->q); - if (r->j != NULL) BN_clear_free(r->j); - if (r->seed) OPENSSL_free(r->seed); - if (r->counter != NULL) BN_clear_free(r->counter); - if (r->pub_key != NULL) BN_clear_free(r->pub_key); - if (r->priv_key != NULL) BN_clear_free(r->priv_key); - OPENSSL_free(r); - } - -int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, - CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) - { - dh_meth_num++; - return(CRYPTO_get_ex_new_index(dh_meth_num-1, - &dh_meth,argl,argp,new_func,dup_func,free_func)); - } + 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_UP_REF(&r->references, &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)); - } +{ + 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)); - } +{ + 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)); - } +{ + 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, + const BIGNUM **p, const BIGNUM **q, const 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. + */ + if ((dh->p == NULL && p == NULL) + || (dh->g == NULL && g == NULL)) + 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, const BIGNUM **pub_key, const 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 field pub_key in dh is NULL, the corresponding input + * parameters MUST be non-NULL. The priv_key field may + * be left NULL. + */ + if (dh->pub_key == NULL && pub_key == NULL) + 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; +}