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