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