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/* rsa_null.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/rand.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);
#if 0 /* not currently used */
static int RSA_null_mod_exp(const BIGNUM *r0, const BIGNUM *i, RSA *rsa);
#endif
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;
}
#if 0 /* not currently used */
static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
{
...err(RSA_F_RSA_NULL_MOD_EXP, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
return -1;
}
#endif
static int RSA_null_init(RSA *rsa)
{
return(1);
}
static int RSA_null_finish(RSA *rsa)
{
return(1);
}
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