1998-12-21 18:56:39 +08:00
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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1998-12-21 18:52:47 +08:00
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:52:47 +08:00
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:52:47 +08:00
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:52:47 +08:00
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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2015-01-22 11:40:55 +08:00
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* 4. If you include any Windows specific code (or a derivative thereof) from
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1998-12-21 18:52:47 +08:00
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:52:47 +08:00
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:52:47 +08:00
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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1998-12-22 23:04:48 +08:00
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/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
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1998-12-21 18:52:47 +08:00
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#include <stdio.h>
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2015-05-14 22:56:48 +08:00
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#include "internal/cryptlib.h"
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1999-04-24 06:13:45 +08:00
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#include <openssl/bn.h>
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2016-03-30 22:21:39 +08:00
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#include "dsa_locl.h"
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1999-04-24 06:13:45 +08:00
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#include <openssl/asn1.h>
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2016-03-19 02:30:20 +08:00
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#include <openssl/engine.h>
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#include <openssl/dh.h>
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1998-12-21 18:52:47 +08:00
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2001-07-26 17:02:44 +08:00
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static const DSA_METHOD *default_DSA_method = NULL;
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1999-08-23 01:57:38 +08:00
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2001-09-26 04:23:40 +08:00
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void DSA_set_default_method(const DSA_METHOD *meth)
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2015-01-22 11:40:55 +08:00
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{
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default_DSA_method = meth;
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}
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1999-08-23 01:57:38 +08:00
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2001-09-26 04:23:40 +08:00
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const DSA_METHOD *DSA_get_default_method(void)
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2015-01-22 11:40:55 +08:00
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{
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if (!default_DSA_method)
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default_DSA_method = DSA_OpenSSL();
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return default_DSA_method;
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}
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1999-08-23 01:57:38 +08:00
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1999-04-20 05:31:43 +08:00
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DSA *DSA_new(void)
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2015-01-22 11:40:55 +08:00
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{
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return DSA_new_method(NULL);
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}
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1999-08-23 01:57:38 +08:00
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2001-09-26 04:23:40 +08:00
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int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
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2015-01-22 11:40:55 +08:00
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{
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/*
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* NB: The caller is specifically setting a method, so it's not up to us
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* to deal with which ENGINE it comes from.
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*/
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const DSA_METHOD *mtmp;
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mtmp = dsa->meth;
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if (mtmp->finish)
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mtmp->finish(dsa);
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2003-01-31 01:39:26 +08:00
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#ifndef OPENSSL_NO_ENGINE
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2016-02-26 01:09:06 +08:00
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ENGINE_finish(dsa->engine);
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dsa->engine = NULL;
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2003-01-31 01:39:26 +08:00
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#endif
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2015-01-22 11:40:55 +08:00
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dsa->meth = meth;
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if (meth->init)
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meth->init(dsa);
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return 1;
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}
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1999-08-23 01:57:38 +08:00
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2016-03-31 00:18:55 +08:00
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const DSA_METHOD *DSA_get_method(DSA *d)
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{
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return d->meth;
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}
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2000-10-27 05:07:28 +08:00
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DSA *DSA_new_method(ENGINE *engine)
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2015-01-22 11:40:55 +08:00
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{
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DSA *ret;
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2015-09-03 21:15:26 +08:00
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ret = OPENSSL_zalloc(sizeof(*ret));
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2015-01-22 11:40:55 +08:00
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if (ret == NULL) {
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DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
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2016-03-04 23:43:46 +08:00
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return NULL;
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2015-01-22 11:40:55 +08:00
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}
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ret->meth = DSA_get_default_method();
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2003-01-31 01:39:26 +08:00
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#ifndef OPENSSL_NO_ENGINE
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2015-01-22 11:40:55 +08:00
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if (engine) {
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if (!ENGINE_init(engine)) {
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DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
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OPENSSL_free(ret);
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return NULL;
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}
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ret->engine = engine;
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} else
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ret->engine = ENGINE_get_default_DSA();
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if (ret->engine) {
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ret->meth = ENGINE_get_DSA(ret->engine);
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2016-02-26 01:09:06 +08:00
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if (ret->meth == NULL) {
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2015-01-22 11:40:55 +08:00
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DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
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ENGINE_finish(ret->engine);
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OPENSSL_free(ret);
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return NULL;
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}
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}
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2003-01-31 01:39:26 +08:00
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#endif
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2001-06-24 07:07:34 +08:00
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2015-01-22 11:40:55 +08:00
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ret->references = 1;
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ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
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2016-03-04 23:43:46 +08:00
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2015-01-22 11:40:55 +08:00
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
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2016-03-04 23:43:46 +08:00
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ret->lock = CRYPTO_THREAD_lock_new();
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if (ret->lock == NULL) {
|
2003-01-31 01:39:26 +08:00
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#ifndef OPENSSL_NO_ENGINE
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2016-02-28 23:01:41 +08:00
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ENGINE_finish(ret->engine);
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2003-01-31 01:39:26 +08:00
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#endif
|
2015-01-22 11:40:55 +08:00
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
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OPENSSL_free(ret);
|
2016-03-04 23:43:46 +08:00
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return NULL;
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}
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if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
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DSA_free(ret);
|
2015-01-22 11:40:55 +08:00
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ret = NULL;
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}
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2016-03-04 23:43:46 +08:00
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return ret;
|
2015-01-22 11:40:55 +08:00
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}
|
1998-12-21 18:52:47 +08:00
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1999-04-20 05:31:43 +08:00
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void DSA_free(DSA *r)
|
2015-01-22 11:40:55 +08:00
|
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{
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int i;
|
1998-12-21 18:52:47 +08:00
|
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|
2015-01-22 11:40:55 +08:00
|
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if (r == NULL)
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return;
|
1998-12-21 18:52:47 +08:00
|
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|
|
2016-03-04 23:43:46 +08:00
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CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
|
2016-01-31 01:04:25 +08:00
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REF_PRINT_COUNT("DSA", r);
|
2015-01-22 11:40:55 +08:00
|
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if (i > 0)
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return;
|
2016-01-31 01:04:25 +08:00
|
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REF_ASSERT_ISNT(i < 0);
|
1998-12-21 18:52:47 +08:00
|
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|
2015-01-22 11:40:55 +08:00
|
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|
if (r->meth->finish)
|
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|
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r->meth->finish(r);
|
2003-01-31 01:39:26 +08:00
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2016-02-28 23:01:41 +08:00
|
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|
ENGINE_finish(r->engine);
|
2003-01-31 01:39:26 +08:00
|
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|
#endif
|
1999-08-23 01:57:38 +08:00
|
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|
|
2015-01-22 11:40:55 +08:00
|
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|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
|
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|
|
|
2016-03-04 23:43:46 +08:00
|
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|
CRYPTO_THREAD_lock_free(r->lock);
|
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|
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|
2015-05-01 09:37:06 +08:00
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|
BN_clear_free(r->p);
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BN_clear_free(r->q);
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|
|
BN_clear_free(r->g);
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|
|
BN_clear_free(r->pub_key);
|
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|
|
BN_clear_free(r->priv_key);
|
2015-01-22 11:40:55 +08:00
|
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|
OPENSSL_free(r);
|
|
|
|
}
|
1998-12-21 18:52:47 +08:00
|
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|
|
2001-09-03 21:40:07 +08:00
|
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|
int DSA_up_ref(DSA *r)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
2016-03-04 23:43:46 +08:00
|
|
|
int i;
|
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|
|
|
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|
|
if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
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|
|
|
return 0;
|
2016-01-31 01:04:25 +08:00
|
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|
|
|
|
|
REF_PRINT_COUNT("DSA", r);
|
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|
|
REF_ASSERT_ISNT(i < 2);
|
2015-01-22 11:40:55 +08:00
|
|
|
return ((i > 1) ? 1 : 0);
|
|
|
|
}
|
2001-08-26 01:24:21 +08:00
|
|
|
|
2000-11-07 21:54:39 +08:00
|
|
|
int DSA_size(const DSA *r)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
|
|
|
int ret, i;
|
|
|
|
ASN1_INTEGER bs;
|
|
|
|
unsigned char buf[4]; /* 4 bytes looks really small. However,
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|
|
|
* i2d_ASN1_INTEGER() will not look beyond
|
|
|
|
* the first byte, as long as the second
|
|
|
|
* parameter is NULL. */
|
|
|
|
|
|
|
|
i = BN_num_bits(r->q);
|
|
|
|
bs.length = (i + 7) / 8;
|
|
|
|
bs.data = buf;
|
|
|
|
bs.type = V_ASN1_INTEGER;
|
|
|
|
/* If the top bit is set the asn1 encoding is 1 larger. */
|
|
|
|
buf[0] = 0xff;
|
|
|
|
|
|
|
|
i = i2d_ASN1_INTEGER(&bs, NULL);
|
|
|
|
i += i; /* r and s */
|
|
|
|
ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
|
|
|
|
return (ret);
|
|
|
|
}
|
1998-12-21 18:52:47 +08:00
|
|
|
|
2000-01-24 07:41:49 +08:00
|
|
|
int DSA_set_ex_data(DSA *d, int idx, void *arg)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
|
|
|
return (CRYPTO_set_ex_data(&d->ex_data, idx, arg));
|
|
|
|
}
|
1999-08-23 01:57:38 +08:00
|
|
|
|
2000-01-24 07:41:49 +08:00
|
|
|
void *DSA_get_ex_data(DSA *d, int idx)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
|
|
|
return (CRYPTO_get_ex_data(&d->ex_data, idx));
|
|
|
|
}
|
1999-08-23 01:57:38 +08:00
|
|
|
|
2014-01-18 22:51:40 +08:00
|
|
|
int DSA_security_bits(const DSA *d)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
2015-12-30 21:34:53 +08:00
|
|
|
if (d->p && d->q)
|
|
|
|
return BN_security_bits(BN_num_bits(d->p), BN_num_bits(d->q));
|
|
|
|
return -1;
|
2015-01-22 11:40:55 +08:00
|
|
|
}
|
2014-01-18 22:51:40 +08:00
|
|
|
|
2001-02-20 00:06:34 +08:00
|
|
|
#ifndef OPENSSL_NO_DH
|
2000-11-07 21:54:39 +08:00
|
|
|
DH *DSA_dup_DH(const DSA *r)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* DSA has p, q, g, optional pub_key, optional priv_key. DH has p,
|
|
|
|
* optional length, g, optional pub_key, optional priv_key, optional q.
|
|
|
|
*/
|
|
|
|
|
|
|
|
DH *ret = NULL;
|
2016-04-07 00:49:48 +08:00
|
|
|
BIGNUM *p = NULL, *q = NULL, *g = NULL, *pub_key = NULL, *priv_key = NULL;
|
2015-01-22 11:40:55 +08:00
|
|
|
|
|
|
|
if (r == NULL)
|
|
|
|
goto err;
|
|
|
|
ret = DH_new();
|
|
|
|
if (ret == NULL)
|
|
|
|
goto err;
|
2016-04-07 00:49:48 +08:00
|
|
|
if (r->p != NULL || r->g != NULL || r->q != NULL) {
|
|
|
|
if (r->p == NULL || r->g == NULL || r->q == NULL) {
|
|
|
|
/* Shouldn't happen */
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2016-04-07 00:49:48 +08:00
|
|
|
}
|
|
|
|
p = BN_dup(r->p);
|
|
|
|
g = BN_dup(r->g);
|
|
|
|
q = BN_dup(r->q);
|
|
|
|
if (p == NULL || g == NULL || q == NULL || !DH_set0_pqg(ret, p, q, g))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2016-04-07 21:08:52 +08:00
|
|
|
p = g = q = NULL;
|
2015-01-22 11:40:55 +08:00
|
|
|
}
|
2016-04-07 00:49:48 +08:00
|
|
|
|
|
|
|
if (r->pub_key != NULL) {
|
|
|
|
pub_key = BN_dup(r->pub_key);
|
|
|
|
if (pub_key == NULL)
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2016-04-07 00:49:48 +08:00
|
|
|
if (r->priv_key != NULL) {
|
|
|
|
priv_key = BN_dup(r->priv_key);
|
|
|
|
if (priv_key == NULL)
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
if (!DH_set0_key(ret, pub_key, priv_key))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2016-04-07 00:49:48 +08:00
|
|
|
} else if (r->priv_key != NULL) {
|
|
|
|
/* Shouldn't happen */
|
|
|
|
goto err;
|
|
|
|
}
|
2015-01-22 11:40:55 +08:00
|
|
|
|
|
|
|
return ret;
|
1999-08-05 19:50:18 +08:00
|
|
|
|
|
|
|
err:
|
2016-04-07 00:49:48 +08:00
|
|
|
BN_free(p);
|
|
|
|
BN_free(g);
|
|
|
|
BN_free(q);
|
|
|
|
BN_free(pub_key);
|
|
|
|
BN_free(priv_key);
|
2015-03-24 22:17:37 +08:00
|
|
|
DH_free(ret);
|
2015-01-22 11:40:55 +08:00
|
|
|
return NULL;
|
|
|
|
}
|
1999-08-05 19:50:18 +08:00
|
|
|
#endif
|
2016-03-30 22:21:39 +08:00
|
|
|
|
2016-03-31 00:18:55 +08:00
|
|
|
void DSA_get0_pqg(const DSA *d, BIGNUM **p, BIGNUM **q, BIGNUM **g)
|
2016-03-30 22:21:39 +08:00
|
|
|
{
|
2016-03-31 00:18:55 +08:00
|
|
|
if (p != NULL)
|
|
|
|
*p = d->p;
|
|
|
|
if (q != NULL)
|
|
|
|
*q = d->q;
|
|
|
|
if (g != NULL)
|
|
|
|
*g = d->g;
|
2016-03-30 22:21:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g)
|
|
|
|
{
|
|
|
|
if (p == NULL || q == NULL || g == NULL)
|
|
|
|
return 0;
|
|
|
|
BN_free(d->p);
|
|
|
|
BN_free(d->q);
|
|
|
|
BN_free(d->g);
|
|
|
|
d->p = p;
|
|
|
|
d->q = q;
|
|
|
|
d->g = g;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2016-03-31 00:18:55 +08:00
|
|
|
void DSA_get0_key(const DSA *d, BIGNUM **pub_key, BIGNUM **priv_key)
|
2016-03-30 22:21:39 +08:00
|
|
|
{
|
2016-03-31 00:18:55 +08:00
|
|
|
if (pub_key != NULL)
|
|
|
|
*pub_key = d->pub_key;
|
|
|
|
if (priv_key != NULL)
|
|
|
|
*priv_key = d->priv_key;
|
2016-03-30 22:21:39 +08:00
|
|
|
}
|
|
|
|
|
2016-03-31 00:18:55 +08:00
|
|
|
int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key)
|
2016-03-30 22:21:39 +08:00
|
|
|
{
|
|
|
|
/* Note that it is valid for priv_key to be NULL */
|
|
|
|
if (pub_key == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
BN_free(d->pub_key);
|
|
|
|
BN_free(d->priv_key);
|
|
|
|
d->pub_key = pub_key;
|
|
|
|
d->priv_key = priv_key;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
void DSA_clear_flags(DSA *d, int flags)
|
|
|
|
{
|
|
|
|
d->flags &= ~flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DSA_test_flags(const DSA *d, int flags)
|
|
|
|
{
|
|
|
|
return d->flags & flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
void DSA_set_flags(DSA *d, int flags)
|
|
|
|
{
|
|
|
|
d->flags |= flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
ENGINE *DSA_get0_engine(DSA *d)
|
|
|
|
{
|
|
|
|
return d->engine;
|
|
|
|
}
|