368 lines
8.3 KiB
C
368 lines
8.3 KiB
C
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/* $OpenBSD: rsa_lib.c,v 1.40 2020/01/17 10:40:03 inoguchi Exp $ */
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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/opensslconf.h>
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#include <openssl/bn.h>
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#include <openssl/crypto.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/lhash.h>
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#include <openssl/rsa.h>
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#include "evp_locl.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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static const RSA_METHOD *default_RSA_meth = NULL;
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RSA *
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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
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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 *
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RSA_get_default_method(void)
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{
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if (default_RSA_meth == NULL)
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default_RSA_meth = RSA_PKCS1_SSLeay();
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return default_RSA_meth;
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}
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const RSA_METHOD *
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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
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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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ENGINE_finish(rsa->engine);
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rsa->engine = NULL;
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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 *
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RSA_new_method(ENGINE *engine)
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{
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RSA *ret;
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if ((ret = calloc(1, sizeof(RSA))) == NULL) {
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RSAerror(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 != NULL) {
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if (!ENGINE_init(engine)) {
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RSAerror(ERR_R_ENGINE_LIB);
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goto err;
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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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}
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if (ret->engine != NULL) {
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if ((ret->meth = ENGINE_get_RSA(ret->engine)) == NULL) {
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RSAerror(ERR_R_ENGINE_LIB);
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goto err;
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}
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}
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#endif
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ret->references = 1;
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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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goto err;
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if (ret->meth->init != NULL && !ret->meth->init(ret)) {
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
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goto err;
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}
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return ret;
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err:
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(ret->engine);
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#endif
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free(ret);
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return NULL;
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}
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void
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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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if (i > 0)
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return;
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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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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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BN_clear_free(r->n);
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BN_clear_free(r->e);
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BN_clear_free(r->d);
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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->dmp1);
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BN_clear_free(r->dmq1);
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BN_clear_free(r->iqmp);
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BN_BLINDING_free(r->blinding);
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BN_BLINDING_free(r->mt_blinding);
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RSA_PSS_PARAMS_free(r->pss);
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free(r);
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}
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int
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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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return i > 1 ? 1 : 0;
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}
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int
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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
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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 *
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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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void
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RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
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{
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if (n != NULL)
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*n = r->n;
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if (e != NULL)
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*e = r->e;
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if (d != NULL)
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*d = r->d;
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}
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int
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RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
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{
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if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL))
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return 0;
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if (n != NULL) {
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BN_free(r->n);
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r->n = n;
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}
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if (e != NULL) {
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BN_free(r->e);
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r->e = e;
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}
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if (d != NULL) {
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BN_free(r->d);
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r->d = d;
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}
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return 1;
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}
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void
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RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1,
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const BIGNUM **iqmp)
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{
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if (dmp1 != NULL)
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*dmp1 = r->dmp1;
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if (dmq1 != NULL)
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*dmq1 = r->dmq1;
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if (iqmp != NULL)
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*iqmp = r->iqmp;
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}
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int
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RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
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{
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if ((r->dmp1 == NULL && dmp1 == NULL) ||
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(r->dmq1 == NULL && dmq1 == NULL) ||
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(r->iqmp == NULL && iqmp == NULL))
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return 0;
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if (dmp1 != NULL) {
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BN_free(r->dmp1);
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r->dmp1 = dmp1;
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}
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if (dmq1 != NULL) {
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BN_free(r->dmq1);
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r->dmq1 = dmq1;
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}
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if (iqmp != NULL) {
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BN_free(r->iqmp);
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r->iqmp = iqmp;
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}
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return 1;
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}
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void
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RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
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{
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if (p != NULL)
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*p = r->p;
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if (q != NULL)
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*q = r->q;
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}
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int
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RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
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{
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if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL))
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return 0;
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if (p != NULL) {
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BN_free(r->p);
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r->p = p;
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}
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if (q != NULL) {
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BN_free(r->q);
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r->q = q;
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}
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return 1;
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}
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void
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RSA_clear_flags(RSA *r, int flags)
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{
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r->flags &= ~flags;
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}
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int
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RSA_test_flags(const RSA *r, int flags)
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{
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return r->flags & flags;
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}
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void
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RSA_set_flags(RSA *r, int flags)
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{
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r->flags |= flags;
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}
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int
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RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2)
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{
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/* Return an error if the key type is not RSA or RSA-PSS. */
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if (ctx != NULL && ctx->pmeth != NULL &&
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ctx->pmeth->pkey_id != EVP_PKEY_RSA &&
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ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
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return -1;
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return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2);
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}
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