A local copy of OpenSSL from GitHub
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/*
* Copyright 1999-2016 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 "internal/cryptlib.h"
#include <openssl/bn.h>
#include <openssl/rand.h>
#include "rsa_locl.h"
/*
* This is a dummy RSA implementation that just returns errors when called.
* It is designed to allow some RSA functions to work while stopping those
* covered by the RSA patent. That is RSA, encryption, decryption, signing
* and verify is not allowed but RSA key generation, key checking and other
* operations (like storing RSA keys) are permitted.
*/
static int RSA_null_public_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int RSA_null_private_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int RSA_null_public_decrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int RSA_null_private_decrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int RSA_null_init(RSA *rsa);
static int RSA_null_finish(RSA *rsa);
static RSA_METHOD rsa_null_meth = {
"Null RSA",
RSA_null_public_encrypt,
RSA_null_public_decrypt,
RSA_null_private_encrypt,
RSA_null_private_decrypt,
NULL,
NULL,
RSA_null_init,
RSA_null_finish,
0,
NULL,
NULL,
NULL,
NULL
};
const RSA_METHOD *RSA_null_method(void)
{
return (&rsa_null_meth);
}
static int RSA_null_public_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
RSAerr(RSA_F_RSA_NULL_PUBLIC_ENCRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
return -1;
}
static int RSA_null_private_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
RSAerr(RSA_F_RSA_NULL_PRIVATE_ENCRYPT,
RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
return -1;
}
static int RSA_null_private_decrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
RSAerr(RSA_F_RSA_NULL_PRIVATE_DECRYPT,
RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
return -1;
}
static int RSA_null_public_decrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
RSAerr(RSA_F_RSA_NULL_PUBLIC_DECRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
return -1;
}
static int RSA_null_init(RSA *rsa)
{
return (1);
}
static int RSA_null_finish(RSA *rsa)
{
return (1);
}