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cb78486d97
ENGINE surgery. DH, DSA, RAND, and RSA now use *both* "method" and ENGINE pointers to manage their hooking with ENGINE. Previously their use of "method" pointers was replaced by use of ENGINE references. See crypto/engine/README for details. Also, remove the ENGINE iterations from evp_test - even when the cipher/digest code is committed in, this functionality would require a different set of API calls.
369 lines
9.5 KiB
C
369 lines
9.5 KiB
C
/* crypto/rsa/rsa_lib.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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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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*
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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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*
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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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*
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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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* 4. If you include any Windows specific code (or a derivative thereof) from
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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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*
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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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*
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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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#include <stdio.h>
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#include <openssl/crypto.h>
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#include "cryptlib.h"
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#include <openssl/lhash.h>
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <openssl/engine.h>
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const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
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static const RSA_METHOD *default_RSA_meth=NULL;
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RSA *RSA_new(void)
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{
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return(RSA_new_method(NULL));
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}
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void RSA_set_default_method(const RSA_METHOD *meth)
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{
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default_RSA_meth = meth;
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}
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const RSA_METHOD *RSA_get_default_method(void)
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{
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if (default_RSA_meth == NULL)
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{
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#ifdef RSA_NULL
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default_RSA_meth=RSA_null_method();
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#else
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#if 0 /* was: #ifdef RSAref */
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default_RSA_meth=RSA_PKCS1_RSAref();
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#else
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default_RSA_meth=RSA_PKCS1_SSLeay();
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#endif
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#endif
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}
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return default_RSA_meth;
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}
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const RSA_METHOD *RSA_get_method(const RSA *rsa)
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{
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return rsa->meth;
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}
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int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
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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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const RSA_METHOD *mtmp;
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mtmp = rsa->meth;
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if (mtmp->finish) mtmp->finish(rsa);
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if (rsa->engine)
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{
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ENGINE_finish(rsa->engine);
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rsa->engine = NULL;
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}
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rsa->meth = meth;
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if (meth->init) meth->init(rsa);
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return 1;
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}
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RSA *RSA_new_method(ENGINE *engine)
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{
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RSA *ret;
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ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
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if (ret == NULL)
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{
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RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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ret->meth = RSA_get_default_method();
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ret->engine = engine;
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if(!ret->engine)
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ret->engine = ENGINE_get_default_RSA();
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if(ret->engine)
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{
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ret->meth = ENGINE_get_RSA(ret->engine);
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if(!ret->meth)
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{
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RSAerr(RSA_F_RSA_NEW_METHOD,
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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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ret->pad=0;
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ret->version=0;
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ret->n=NULL;
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ret->e=NULL;
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ret->d=NULL;
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ret->p=NULL;
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ret->q=NULL;
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ret->dmp1=NULL;
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ret->dmq1=NULL;
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ret->iqmp=NULL;
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ret->references=1;
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ret->_method_mod_n=NULL;
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ret->_method_mod_p=NULL;
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ret->_method_mod_q=NULL;
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ret->blinding=NULL;
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ret->bignum_data=NULL;
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ret->flags=ret->meth->flags;
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
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if ((ret->meth->init != NULL) && !ret->meth->init(ret))
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{
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
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OPENSSL_free(ret);
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ret=NULL;
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}
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return(ret);
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}
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void RSA_free(RSA *r)
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{
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int i;
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if (r == NULL) return;
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i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
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#ifdef REF_PRINT
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REF_PRINT("RSA",r);
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#endif
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if (i > 0) return;
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#ifdef REF_CHECK
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if (i < 0)
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{
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fprintf(stderr,"RSA_free, bad reference count\n");
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abort();
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}
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#endif
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if (r->meth->finish)
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r->meth->finish(r);
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if (r->engine)
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ENGINE_finish(r->engine);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
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if (r->n != NULL) BN_clear_free(r->n);
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if (r->e != NULL) BN_clear_free(r->e);
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if (r->d != NULL) BN_clear_free(r->d);
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if (r->p != NULL) BN_clear_free(r->p);
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if (r->q != NULL) BN_clear_free(r->q);
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if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
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if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
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if (r->iqmp != NULL) BN_clear_free(r->iqmp);
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if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
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if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
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OPENSSL_free(r);
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}
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int RSA_up_ref(RSA *r)
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{
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int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
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#ifdef REF_PRINT
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REF_PRINT("RSA",r);
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#endif
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#ifdef REF_CHECK
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if (i < 2)
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{
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fprintf(stderr, "RSA_up_ref, bad reference count\n");
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abort();
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}
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#endif
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return ((i > 1) ? 1 : 0);
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}
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int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
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{
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
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new_func, dup_func, free_func);
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}
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int RSA_set_ex_data(RSA *r, int idx, void *arg)
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{
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return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
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}
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void *RSA_get_ex_data(const RSA *r, int idx)
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{
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return(CRYPTO_get_ex_data(&r->ex_data,idx));
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}
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int RSA_size(const RSA *r)
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{
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return(BN_num_bytes(r->n));
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}
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int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
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RSA *rsa, int padding)
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{
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return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
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}
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int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
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RSA *rsa, int padding)
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{
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return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
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}
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int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
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RSA *rsa, int padding)
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{
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return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
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}
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int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
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RSA *rsa, int padding)
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{
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return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
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}
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int RSA_flags(const RSA *r)
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{
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return((r == NULL)?0:r->meth->flags);
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}
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void RSA_blinding_off(RSA *rsa)
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{
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if (rsa->blinding != NULL)
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{
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BN_BLINDING_free(rsa->blinding);
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rsa->blinding=NULL;
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}
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rsa->flags&= ~RSA_FLAG_BLINDING;
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}
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int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
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{
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BIGNUM *A,*Ai;
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BN_CTX *ctx;
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int ret=0;
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if (p_ctx == NULL)
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{
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if ((ctx=BN_CTX_new()) == NULL) goto err;
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}
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else
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ctx=p_ctx;
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if (rsa->blinding != NULL)
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BN_BLINDING_free(rsa->blinding);
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BN_CTX_start(ctx);
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A = BN_CTX_get(ctx);
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if (!BN_rand_range(A,rsa->n)) goto err;
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if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
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if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
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goto err;
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rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
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rsa->flags|=RSA_FLAG_BLINDING;
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BN_free(Ai);
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ret=1;
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err:
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BN_CTX_end(ctx);
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if (ctx != p_ctx) BN_CTX_free(ctx);
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return(ret);
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}
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int RSA_memory_lock(RSA *r)
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{
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int i,j,k,off;
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char *p;
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BIGNUM *bn,**t[6],*b;
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BN_ULONG *ul;
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if (r->d == NULL) return(1);
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t[0]= &r->d;
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t[1]= &r->p;
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t[2]= &r->q;
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t[3]= &r->dmp1;
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t[4]= &r->dmq1;
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t[5]= &r->iqmp;
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k=sizeof(BIGNUM)*6;
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off=k/sizeof(BN_ULONG)+1;
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j=1;
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for (i=0; i<6; i++)
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j+= (*t[i])->top;
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if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
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{
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RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
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return(0);
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}
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bn=(BIGNUM *)p;
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ul=(BN_ULONG *)&(p[off]);
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for (i=0; i<6; i++)
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{
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b= *(t[i]);
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*(t[i])= &(bn[i]);
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memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
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bn[i].flags=BN_FLG_STATIC_DATA;
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bn[i].d=ul;
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memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
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ul+=b->top;
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BN_clear_free(b);
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}
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/* I should fix this so it can still be done */
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r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
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r->bignum_data=p;
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return(1);
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}
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