1/*
2 * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved.
3 *
4 * The contents of this file constitute Original Code as defined in and are
5 * subject to the Apple Public Source License Version 1.2 (the 'License').
6 * You may not use this file except in compliance with the License. Please obtain
7 * a copy of the License at http://www.apple.com/publicsource and read it before
8 * using this file.
9 *
10 * This Original Code and all software distributed under the License are
11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
15 * specific language governing rights and limitations under the License.
16 */
17
18
19/* rsa_null.c */
20/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
21 * project 1999.
22 */
23/* ====================================================================
24 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
25 *
26 * Redistribution and use in source and binary forms, with or without
27 * modification, are permitted provided that the following conditions
28 * are met:
29 *
30 * 1. Redistributions of source code must retain the above copyright
31 *    notice, this list of conditions and the following disclaimer.
32 *
33 * 2. Redistributions in binary form must reproduce the above copyright
34 *    notice, this list of conditions and the following disclaimer in
35 *    the documentation and/or other materials provided with the
36 *    distribution.
37 *
38 * 3. All advertising materials mentioning features or use of this
39 *    software must display the following acknowledgment:
40 *    "This product includes software developed by the OpenSSL Project
41 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
42 *
43 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
44 *    endorse or promote products derived from this software without
45 *    prior written permission. For written permission, please contact
46 *    licensing@OpenSSL.org.
47 *
48 * 5. Products derived from this software may not be called "OpenSSL"
49 *    nor may "OpenSSL" appear in their names without prior written
50 *    permission of the OpenSSL Project.
51 *
52 * 6. Redistributions of any form whatsoever must retain the following
53 *    acknowledgment:
54 *    "This product includes software developed by the OpenSSL Project
55 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
58 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
60 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
61 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
62 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
64 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
66 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
68 * OF THE POSSIBILITY OF SUCH DAMAGE.
69 * ====================================================================
70 *
71 * This product includes cryptographic software written by Eric Young
72 * (eay@cryptsoft.com).  This product includes software written by Tim
73 * Hudson (tjh@cryptsoft.com).
74 *
75 */
76
77#include <stdio.h>
78#include "cryptlib.h"
79#include <openssl/bn.h>
80#include <openssl/rsa.h>
81#include <openssl/rand.h>
82
83/* This is a dummy RSA implementation that just returns errors when called.
84 * It is designed to allow some RSA functions to work while stopping those
85 * covered by the RSA patent. That is RSA, encryption, decryption, signing
86 * and verify is not allowed but RSA key generation, key checking and other
87 * operations (like storing RSA keys) are permitted.
88 */
89
90static int RSA_null_public_encrypt(int flen, unsigned char *from,
91		unsigned char *to, RSA *rsa,int padding);
92static int RSA_null_private_encrypt(int flen, unsigned char *from,
93		unsigned char *to, RSA *rsa,int padding);
94static int RSA_null_public_decrypt(int flen, unsigned char *from,
95		unsigned char *to, RSA *rsa,int padding);
96static int RSA_null_private_decrypt(int flen, unsigned char *from,
97		unsigned char *to, RSA *rsa,int padding);
98#if 0 /* not currently used */
99static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *i, RSA *rsa);
100#endif
101static int RSA_null_init(RSA *rsa);
102static int RSA_null_finish(RSA *rsa);
103static const RSA_METHOD rsa_null_meth={
104	"Null RSA",
105	RSA_null_public_encrypt,
106	RSA_null_public_decrypt,
107	RSA_null_private_encrypt,
108	RSA_null_private_decrypt,
109	NULL, NULL,
110	RSA_null_init,
111	RSA_null_finish,
112	0,
113	NULL,
114	};
115
116const RSA_METHOD *RSA_null_method(void)
117	{
118	return(&rsa_null_meth);
119	}
120
121static int RSA_null_public_encrypt(int flen, unsigned char *from,
122	     unsigned char *to, RSA *rsa, int padding)
123	{
124	RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
125	return -1;
126	}
127
128static int RSA_null_private_encrypt(int flen, unsigned char *from,
129	     unsigned char *to, RSA *rsa, int padding)
130	{
131	RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
132	return -1;
133	}
134
135static int RSA_null_private_decrypt(int flen, unsigned char *from,
136	     unsigned char *to, RSA *rsa, int padding)
137	{
138	RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
139	return -1;
140	}
141
142static int RSA_null_public_decrypt(int flen, unsigned char *from,
143	     unsigned char *to, RSA *rsa, int padding)
144	{
145	RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
146	return -1;
147	}
148
149#if 0 /* not currently used */
150static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
151	{
152	RSAerr(RSA_F_RSA_NULL, RSA_R_RSA_OPERATIONS_NOT_SUPPORTED);
153	return -1;
154	}
155#endif
156
157static int RSA_null_init(RSA *rsa)
158	{
159	return(1);
160	}
161
162static int RSA_null_finish(RSA *rsa)
163	{
164	return(1);
165	}
166
167
168