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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
90 static int RSA_null_public_encrypt(int flen, unsigned char *from,
91 unsigned char *to, RSA *rsa,int padding);
92 static int RSA_null_private_encrypt(int flen, unsigned char *from,
93 unsigned char *to, RSA *rsa,int padding);
94 static int RSA_null_public_decrypt(int flen, unsigned char *from,
95 unsigned char *to, RSA *rsa,int padding);
96 static int RSA_null_private_decrypt(int flen, unsigned char *from,
97 unsigned char *to, RSA *rsa,int padding);
98 #if 0 /* not currently used */
99 static int RSA_null_mod_exp(BIGNUM *r0, BIGNUM *i, RSA *rsa);
100 #endif
101 static int RSA_null_init(RSA *rsa);
102 static int RSA_null_finish(RSA *rsa);
103 static 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
116 const RSA_METHOD *RSA_null_method(void)
117 {
118 return(&rsa_null_meth);
119 }
120
121 static 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
128 static 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
135 static 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
142 static 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 */
150 static 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
157 static int RSA_null_init(RSA *rsa)
158 {
159 return(1);
160 }
161
162 static int RSA_null_finish(RSA *rsa)
163 {
164 return(1);
165 }
166
167