mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
f32b0abe26
Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4431)
170 lines
3.9 KiB
C
170 lines
3.9 KiB
C
/*
|
|
* Copyright 1995-2017 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 "internal/bn_int.h"
|
|
#include <openssl/rand.h>
|
|
#include "rsa_locl.h"
|
|
|
|
int RSA_bits(const RSA *r)
|
|
{
|
|
return BN_num_bits(r->n);
|
|
}
|
|
|
|
int RSA_size(const RSA *r)
|
|
{
|
|
return BN_num_bytes(r->n);
|
|
}
|
|
|
|
int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
|
|
RSA *rsa, int padding)
|
|
{
|
|
return rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
int RSA_private_encrypt(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding)
|
|
{
|
|
return rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
int RSA_private_decrypt(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding)
|
|
{
|
|
return rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
|
|
RSA *rsa, int padding)
|
|
{
|
|
return rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
int RSA_flags(const RSA *r)
|
|
{
|
|
return r == NULL ? 0 : r->meth->flags;
|
|
}
|
|
|
|
void RSA_blinding_off(RSA *rsa)
|
|
{
|
|
BN_BLINDING_free(rsa->blinding);
|
|
rsa->blinding = NULL;
|
|
rsa->flags &= ~RSA_FLAG_BLINDING;
|
|
rsa->flags |= RSA_FLAG_NO_BLINDING;
|
|
}
|
|
|
|
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (rsa->blinding != NULL)
|
|
RSA_blinding_off(rsa);
|
|
|
|
rsa->blinding = RSA_setup_blinding(rsa, ctx);
|
|
if (rsa->blinding == NULL)
|
|
goto err;
|
|
|
|
rsa->flags |= RSA_FLAG_BLINDING;
|
|
rsa->flags &= ~RSA_FLAG_NO_BLINDING;
|
|
ret = 1;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static BIGNUM *rsa_get_public_exp(const BIGNUM *d, const BIGNUM *p,
|
|
const BIGNUM *q, BN_CTX *ctx)
|
|
{
|
|
BIGNUM *ret = NULL, *r0, *r1, *r2;
|
|
|
|
if (d == NULL || p == NULL || q == NULL)
|
|
return NULL;
|
|
|
|
BN_CTX_start(ctx);
|
|
r0 = BN_CTX_get(ctx);
|
|
r1 = BN_CTX_get(ctx);
|
|
r2 = BN_CTX_get(ctx);
|
|
if (r2 == NULL)
|
|
goto err;
|
|
|
|
if (!BN_sub(r1, p, BN_value_one()))
|
|
goto err;
|
|
if (!BN_sub(r2, q, BN_value_one()))
|
|
goto err;
|
|
if (!BN_mul(r0, r1, r2, ctx))
|
|
goto err;
|
|
|
|
ret = BN_mod_inverse(NULL, d, r0, ctx);
|
|
err:
|
|
BN_CTX_end(ctx);
|
|
return ret;
|
|
}
|
|
|
|
BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
|
|
{
|
|
BIGNUM *e;
|
|
BN_CTX *ctx;
|
|
BN_BLINDING *ret = NULL;
|
|
|
|
if (in_ctx == NULL) {
|
|
if ((ctx = BN_CTX_new()) == NULL)
|
|
return 0;
|
|
} else {
|
|
ctx = in_ctx;
|
|
}
|
|
|
|
BN_CTX_start(ctx);
|
|
e = BN_CTX_get(ctx);
|
|
if (e == NULL) {
|
|
RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (rsa->e == NULL) {
|
|
e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
|
|
if (e == NULL) {
|
|
RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
|
|
goto err;
|
|
}
|
|
} else {
|
|
e = rsa->e;
|
|
}
|
|
|
|
{
|
|
BIGNUM *n = BN_new();
|
|
|
|
if (n == NULL) {
|
|
RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME);
|
|
|
|
ret = BN_BLINDING_create_param(NULL, e, n, ctx, rsa->meth->bn_mod_exp,
|
|
rsa->_method_mod_n);
|
|
/* We MUST free n before any further use of rsa->n */
|
|
BN_free(n);
|
|
}
|
|
if (ret == NULL) {
|
|
RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
BN_BLINDING_set_current_thread(ret);
|
|
|
|
err:
|
|
BN_CTX_end(ctx);
|
|
if (ctx != in_ctx)
|
|
BN_CTX_free(ctx);
|
|
if (e != rsa->e)
|
|
BN_free(e);
|
|
|
|
return ret;
|
|
}
|