yuzu/externals/libressl/crypto/rsa/rsa_lib.c

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2020-12-28 19:15:37 +04:00
/* $OpenBSD: rsa_lib.c,v 1.40 2020/01/17 10:40:03 inoguchi Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <openssl/opensslconf.h>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/lhash.h>
#include <openssl/rsa.h>
#include "evp_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
static const RSA_METHOD *default_RSA_meth = NULL;
RSA *
RSA_new(void)
{
RSA *r = RSA_new_method(NULL);
return r;
}
void
RSA_set_default_method(const RSA_METHOD *meth)
{
default_RSA_meth = meth;
}
const RSA_METHOD *
RSA_get_default_method(void)
{
if (default_RSA_meth == NULL)
default_RSA_meth = RSA_PKCS1_SSLeay();
return default_RSA_meth;
}
const RSA_METHOD *
RSA_get_method(const RSA *rsa)
{
return rsa->meth;
}
int
RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
{
/*
* NB: The caller is specifically setting a method, so it's not up to us
* to deal with which ENGINE it comes from.
*/
const RSA_METHOD *mtmp;
mtmp = rsa->meth;
if (mtmp->finish)
mtmp->finish(rsa);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(rsa->engine);
rsa->engine = NULL;
#endif
rsa->meth = meth;
if (meth->init)
meth->init(rsa);
return 1;
}
RSA *
RSA_new_method(ENGINE *engine)
{
RSA *ret;
if ((ret = calloc(1, sizeof(RSA))) == NULL) {
RSAerror(ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->meth = RSA_get_default_method();
#ifndef OPENSSL_NO_ENGINE
if (engine != NULL) {
if (!ENGINE_init(engine)) {
RSAerror(ERR_R_ENGINE_LIB);
goto err;
}
ret->engine = engine;
} else {
ret->engine = ENGINE_get_default_RSA();
}
if (ret->engine != NULL) {
if ((ret->meth = ENGINE_get_RSA(ret->engine)) == NULL) {
RSAerror(ERR_R_ENGINE_LIB);
goto err;
}
}
#endif
ret->references = 1;
ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data))
goto err;
if (ret->meth->init != NULL && !ret->meth->init(ret)) {
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
goto err;
}
return ret;
err:
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ret->engine);
#endif
free(ret);
return NULL;
}
void
RSA_free(RSA *r)
{
int i;
if (r == NULL)
return;
i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
if (i > 0)
return;
if (r->meth->finish)
r->meth->finish(r);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(r->engine);
#endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
BN_clear_free(r->n);
BN_clear_free(r->e);
BN_clear_free(r->d);
BN_clear_free(r->p);
BN_clear_free(r->q);
BN_clear_free(r->dmp1);
BN_clear_free(r->dmq1);
BN_clear_free(r->iqmp);
BN_BLINDING_free(r->blinding);
BN_BLINDING_free(r->mt_blinding);
RSA_PSS_PARAMS_free(r->pss);
free(r);
}
int
RSA_up_ref(RSA *r)
{
int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
return i > 1 ? 1 : 0;
}
int
RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
new_func, dup_func, free_func);
}
int
RSA_set_ex_data(RSA *r, int idx, void *arg)
{
return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
}
void *
RSA_get_ex_data(const RSA *r, int idx)
{
return CRYPTO_get_ex_data(&r->ex_data, idx);
}
void
RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
{
if (n != NULL)
*n = r->n;
if (e != NULL)
*e = r->e;
if (d != NULL)
*d = r->d;
}
int
RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
{
if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL))
return 0;
if (n != NULL) {
BN_free(r->n);
r->n = n;
}
if (e != NULL) {
BN_free(r->e);
r->e = e;
}
if (d != NULL) {
BN_free(r->d);
r->d = d;
}
return 1;
}
void
RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1,
const BIGNUM **iqmp)
{
if (dmp1 != NULL)
*dmp1 = r->dmp1;
if (dmq1 != NULL)
*dmq1 = r->dmq1;
if (iqmp != NULL)
*iqmp = r->iqmp;
}
int
RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
{
if ((r->dmp1 == NULL && dmp1 == NULL) ||
(r->dmq1 == NULL && dmq1 == NULL) ||
(r->iqmp == NULL && iqmp == NULL))
return 0;
if (dmp1 != NULL) {
BN_free(r->dmp1);
r->dmp1 = dmp1;
}
if (dmq1 != NULL) {
BN_free(r->dmq1);
r->dmq1 = dmq1;
}
if (iqmp != NULL) {
BN_free(r->iqmp);
r->iqmp = iqmp;
}
return 1;
}
void
RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
{
if (p != NULL)
*p = r->p;
if (q != NULL)
*q = r->q;
}
int
RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
{
if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL))
return 0;
if (p != NULL) {
BN_free(r->p);
r->p = p;
}
if (q != NULL) {
BN_free(r->q);
r->q = q;
}
return 1;
}
void
RSA_clear_flags(RSA *r, int flags)
{
r->flags &= ~flags;
}
int
RSA_test_flags(const RSA *r, int flags)
{
return r->flags & flags;
}
void
RSA_set_flags(RSA *r, int flags)
{
r->flags |= flags;
}
int
RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2)
{
/* Return an error if the key type is not RSA or RSA-PSS. */
if (ctx != NULL && ctx->pmeth != NULL &&
ctx->pmeth->pkey_id != EVP_PKEY_RSA &&
ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
return -1;
return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2);
}