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/* rsa_null.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <openssl/rand.h>
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/* This is a dummy RSA implementation that just returns errors when called.
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* It is designed to allow some RSA functions to work while stopping those
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* covered by the RSA patent. That is RSA, encryption, decryption, signing
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* and verify is not allowed but RSA key generation, key checking and other
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* operations (like storing RSA keys) are permitted.
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*/
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static int RSA_null_public_encrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa,int padding);
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static int RSA_null_private_encrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa,int padding);
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static int RSA_null_public_decrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa,int padding);
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static int RSA_null_private_decrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa,int padding);
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#if 0 /* not currently used */
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static int RSA_null_mod_exp(const BIGNUM *r0, const BIGNUM *i, RSA *rsa);
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#endif
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static int RSA_null_init(RSA *rsa);
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static int RSA_null_finish(RSA *rsa);
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static RSA_METHOD rsa_null_meth={
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"Null RSA",
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RSA_null_public_encrypt,
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RSA_null_public_decrypt,
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RSA_null_private_encrypt,
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RSA_null_private_decrypt,
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NULL,
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NULL,
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RSA_null_init,
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RSA_null_finish,
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0,
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NULL,
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NULL,
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NULL,
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NULL
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};
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EXPORT_C const RSA_METHOD *RSA_null_method(void)
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{
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return(&rsa_null_meth);
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}
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static int RSA_null_public_encrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding)
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{
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RSAerr(RSA_F_RSA_NULL_PUBLIC_ENCRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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return -1;
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}
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static int RSA_null_private_encrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding)
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{
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RSAerr(RSA_F_RSA_NULL_PRIVATE_ENCRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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return -1;
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}
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static int RSA_null_private_decrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding)
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{
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RSAerr(RSA_F_RSA_NULL_PRIVATE_DECRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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return -1;
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}
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static int RSA_null_public_decrypt(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding)
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{
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RSAerr(RSA_F_RSA_NULL_PUBLIC_DECRYPT, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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return -1;
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}
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#if 0 /* not currently used */
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static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
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{
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...err(RSA_F_RSA_NULL_MOD_EXP, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
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return -1;
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}
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#endif
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static int RSA_null_init(RSA *rsa)
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{
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return(1);
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}
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static int RSA_null_finish(RSA *rsa)
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{
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return(1);
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}
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