A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <openssl/crypto.h>
#include "internal/cryptlib.h"
#include <openssl/lhash.h>
#include "internal/bn_int.h"
#include <openssl/rand.h>
#include <openssl/engine.h>
#include "rsa_locl.h"
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) {
#ifdef RSA_NULL
default_RSA_meth = RSA_null_method();
#else
default_RSA_meth = RSA_PKCS1_OpenSSL();
#endif
}
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;
ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->meth = RSA_get_default_method();
#ifndef OPENSSL_NO_ENGINE
if (engine) {
if (!ENGINE_init(engine)) {
RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
OPENSSL_free(ret);
return NULL;
}
ret->engine = engine;
} else
ret->engine = ENGINE_get_default_RSA();
if (ret->engine) {
ret->meth = ENGINE_get_RSA(ret->engine);
if (ret->meth == NULL) {
RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
ENGINE_finish(ret->engine);
OPENSSL_free(ret);
return NULL;
}
}
#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)) {
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ret->engine);
#endif
OPENSSL_free(ret);
return NULL;
}
ret->lock = CRYPTO_THREAD_lock_new();
if (ret->lock == NULL) {
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ret->engine);
#endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
OPENSSL_free(ret);
return NULL;
}
if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
RSA_free(ret);
ret = NULL;
}
return ret;
}
void RSA_free(RSA *r)
{
int i;
if (r == NULL)
return;
CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
REF_PRINT_COUNT("RSA", r);
if (i > 0)
return;
REF_ASSERT_ISNT(i < 0);
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);
CRYPTO_THREAD_lock_free(r->lock);
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);
OPENSSL_free(r->bignum_data);
OPENSSL_free(r);
}
int RSA_up_ref(RSA *r)
{
int i;
if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
return 0;
REF_PRINT_COUNT("RSA", r);
REF_ASSERT_ISNT(i < 2);
return ((i > 1) ? 1 : 0);
}
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));
}
int RSA_memory_lock(RSA *r)
{
int i, j, k, off;
char *p;
BIGNUM *bn, **t[6], *b;
BN_ULONG *ul;
if (r->d == NULL)
return (1);
t[0] = &r->d;
t[1] = &r->p;
t[2] = &r->q;
t[3] = &r->dmp1;
t[4] = &r->dmq1;
t[5] = &r->iqmp;
k = bn_sizeof_BIGNUM() * 6;
off = k / sizeof(BN_ULONG) + 1;
j = 1;
for (i = 0; i < 6; i++)
j += bn_get_top(*t[i]);
if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) {
RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
return (0);
}
memset(p, 0, sizeof(*p) * (off + j));
bn = (BIGNUM *)p;
ul = (BN_ULONG *)&(p[off]);
for (i = 0; i < 6; i++) {
b = *(t[i]);
*(t[i]) = bn_array_el(bn, i);
memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM());
memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b));
bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b));
ul += bn_get_top(b);
BN_clear_free(b);
}
/* I should fix this so it can still be done */
r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
r->bignum_data = p;
return (1);
}
int RSA_security_bits(const RSA *rsa)
{
return BN_security_bits(BN_num_bits(rsa->n), -1);
}
int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
{
/* If the fields in r are NULL, the corresponding input
* parameters MUST be non-NULL for n and e. d may be
* left NULL (in case only the public key is used).
*
* It is an error to give the results from get0 on r
* as input parameters.
*/
if (n == r->n || e == r->e
|| (r->d != NULL && d == r->d))
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;
}
int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
{
/* If the fields in r are NULL, the corresponding input
* parameters MUST be non-NULL.
*
* It is an error to give the results from get0 on r
* as input parameters.
*/
if (p == r->p || q == r->q)
return 0;
if (p != NULL) {
BN_free(r->p);
r->p = p;
}
if (q != NULL) {
BN_free(r->q);
r->q = q;
}
return 1;
}
int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
{
/* If the fields in r are NULL, the corresponding input
* parameters MUST be non-NULL.
*
* It is an error to give the results from get0 on r
* as input parameters.
*/
if (dmp1 == r->dmp1 || dmq1 == r->dmq1 || iqmp == r->iqmp)
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_key(const RSA *r, BIGNUM **n, BIGNUM **e, BIGNUM **d)
{
if (n != NULL)
*n = r->n;
if (e != NULL)
*e = r->e;
if (d != NULL)
*d = r->d;
}
void RSA_get0_factors(const RSA *r, BIGNUM **p, BIGNUM **q)
{
if (p != NULL)
*p = r->p;
if (q != NULL)
*q = r->q;
}
void RSA_get0_crt_params(const RSA *r,
BIGNUM **dmp1, BIGNUM **dmq1, BIGNUM **iqmp)
{
if (dmp1 != NULL)
*dmp1 = r->dmp1;
if (dmq1 != NULL)
*dmq1 = r->dmq1;
if (iqmp != NULL)
*iqmp = r->iqmp;
}
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;
}
ENGINE *RSA_get0_engine(RSA *r)
{
return r->engine;
}