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336 lines
9.4 KiB
336 lines
9.4 KiB
/* 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/rand.h> |
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#ifndef OPENSSL_NO_ENGINE |
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# include <openssl/engine.h> |
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#endif |
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#ifdef OPENSSL_FIPS |
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# include <openssl/fips.h> |
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#endif |
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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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RSA *r = RSA_new_method(NULL); |
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return r; |
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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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#ifdef OPENSSL_FIPS |
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if (FIPS_mode()) |
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return FIPS_rsa_pkcs1_ssleay(); |
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else |
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return RSA_PKCS1_SSLeay(); |
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#else |
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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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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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/* |
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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 RSA_METHOD *mtmp; |
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mtmp = rsa->meth; |
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if (mtmp->finish) |
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mtmp->finish(rsa); |
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#ifndef OPENSSL_NO_ENGINE |
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if (rsa->engine) { |
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ENGINE_finish(rsa->engine); |
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rsa->engine = NULL; |
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} |
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#endif |
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rsa->meth = meth; |
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if (meth->init) |
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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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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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#ifndef OPENSSL_NO_ENGINE |
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if (engine) { |
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if (!ENGINE_init(engine)) { |
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RSAerr(RSA_F_RSA_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_RSA(); |
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if (ret->engine) { |
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ret->meth = ENGINE_get_RSA(ret->engine); |
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if (!ret->meth) { |
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RSAerr(RSA_F_RSA_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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#endif |
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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->mt_blinding = NULL; |
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ret->bignum_data = NULL; |
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ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; |
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if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { |
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#ifndef OPENSSL_NO_ENGINE |
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if (ret->engine) |
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ENGINE_finish(ret->engine); |
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#endif |
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OPENSSL_free(ret); |
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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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#ifndef OPENSSL_NO_ENGINE |
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if (ret->engine) |
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ENGINE_finish(ret->engine); |
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#endif |
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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) |
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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) |
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return; |
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#ifdef REF_CHECK |
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if (i < 0) { |
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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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#ifndef OPENSSL_NO_ENGINE |
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if (r->engine) |
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ENGINE_finish(r->engine); |
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#endif |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); |
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if (r->n != NULL) |
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BN_clear_free(r->n); |
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if (r->e != NULL) |
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BN_clear_free(r->e); |
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if (r->d != NULL) |
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BN_clear_free(r->d); |
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if (r->p != NULL) |
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BN_clear_free(r->p); |
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if (r->q != NULL) |
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BN_clear_free(r->q); |
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if (r->dmp1 != NULL) |
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BN_clear_free(r->dmp1); |
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if (r->dmq1 != NULL) |
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BN_clear_free(r->dmq1); |
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if (r->iqmp != NULL) |
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BN_clear_free(r->iqmp); |
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if (r->blinding != NULL) |
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BN_BLINDING_free(r->blinding); |
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if (r->mt_blinding != NULL) |
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BN_BLINDING_free(r->mt_blinding); |
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if (r->bignum_data != NULL) |
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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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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_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) |
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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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RSAerr(RSA_F_RSA_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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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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