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1 /* apps/dhparam.c */ |
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2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 * All rights reserved. |
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4 * |
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5 * This package is an SSL implementation written |
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6 * by Eric Young (eay@cryptsoft.com). |
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7 * The implementation was written so as to conform with Netscapes SSL. |
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8 * |
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9 * This library is free for commercial and non-commercial use as long as |
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10 * the following conditions are aheared to. The following conditions |
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11 * apply to all code found in this distribution, be it the RC4, RSA, |
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12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 * included with this distribution is covered by the same copyright terms |
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14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 * |
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16 * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 * the code are not to be removed. |
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18 * If this package is used in a product, Eric Young should be given attribution |
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19 * as the author of the parts of the library used. |
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20 * This can be in the form of a textual message at program startup or |
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21 * in documentation (online or textual) provided with the package. |
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22 * |
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23 * Redistribution and use in source and binary forms, with or without |
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24 * modification, are permitted provided that the following conditions |
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25 * are met: |
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26 * 1. Redistributions of source code must retain the copyright |
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27 * notice, this list of conditions and the following disclaimer. |
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28 * 2. Redistributions in binary form must reproduce the above copyright |
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29 * notice, this list of conditions and the following disclaimer in the |
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30 * documentation and/or other materials provided with the distribution. |
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31 * 3. All advertising materials mentioning features or use of this software |
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32 * must display the following acknowledgement: |
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33 * "This product includes cryptographic software written by |
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34 * Eric Young (eay@cryptsoft.com)" |
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35 * The word 'cryptographic' can be left out if the rouines from the library |
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36 * being used are not cryptographic related :-). |
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37 * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 * the apps directory (application code) you must include an acknowledgement: |
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39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 * SUCH DAMAGE. |
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52 * |
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53 * The licence and distribution terms for any publically available version or |
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54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 * copied and put under another distribution licence |
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56 * [including the GNU Public Licence.] |
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57 */ |
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58 /* ==================================================================== |
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59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. |
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60 * |
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61 * Redistribution and use in source and binary forms, with or without |
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62 * modification, are permitted provided that the following conditions |
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63 * are met: |
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64 * |
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65 * 1. Redistributions of source code must retain the above copyright |
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66 * notice, this list of conditions and the following disclaimer. |
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67 * |
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68 * 2. Redistributions in binary form must reproduce the above copyright |
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69 * notice, this list of conditions and the following disclaimer in |
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70 * the documentation and/or other materials provided with the |
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71 * distribution. |
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72 * |
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73 * 3. All advertising materials mentioning features or use of this |
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74 * software must display the following acknowledgment: |
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75 * "This product includes software developed by the OpenSSL Project |
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76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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77 * |
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78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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79 * endorse or promote products derived from this software without |
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80 * prior written permission. For written permission, please contact |
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81 * openssl-core@openssl.org. |
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82 * |
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83 * 5. Products derived from this software may not be called "OpenSSL" |
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84 * nor may "OpenSSL" appear in their names without prior written |
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85 * permission of the OpenSSL Project. |
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86 * |
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87 * 6. Redistributions of any form whatsoever must retain the following |
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88 * acknowledgment: |
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89 * "This product includes software developed by the OpenSSL Project |
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90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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91 * |
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92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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103 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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104 * ==================================================================== |
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105 * |
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106 * This product includes cryptographic software written by Eric Young |
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107 * (eay@cryptsoft.com). This product includes software written by Tim |
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108 * Hudson (tjh@cryptsoft.com). |
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109 * |
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110 */ |
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111 |
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112 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */ |
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113 #ifndef OPENSSL_NO_DH |
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114 #include <stdio.h> |
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115 #include <stdlib.h> |
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116 #include <time.h> |
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117 #include <string.h> |
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118 #include "apps.h" |
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119 #include <openssl/bio.h> |
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120 #include <openssl/err.h> |
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121 #include <openssl/bn.h> |
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122 #include <openssl/dh.h> |
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123 #include <openssl/x509.h> |
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124 #include <openssl/pem.h> |
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125 |
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126 #ifndef OPENSSL_NO_DSA |
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127 #include <openssl/dsa.h> |
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128 #endif |
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129 |
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130 #undef PROG |
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131 #define PROG dhparam_main |
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132 |
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133 #define DEFBITS 512 |
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134 |
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135 /* -inform arg - input format - default PEM (DER or PEM) |
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136 * -outform arg - output format - default PEM |
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137 * -in arg - input file - default stdin |
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138 * -out arg - output file - default stdout |
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139 * -dsaparam - read or generate DSA parameters, convert to DH |
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140 * -check - check the parameters are ok |
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141 * -noout |
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142 * -text |
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143 * -C |
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144 */ |
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145 |
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146 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb); |
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147 |
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148 int MAIN(int, char **); |
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149 |
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150 int MAIN(int argc, char **argv) |
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151 { |
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152 #ifndef OPENSSL_NO_ENGINE |
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153 ENGINE *e = NULL; |
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154 #endif |
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155 DH *dh=NULL; |
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156 int i,badops=0,text=0; |
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157 #ifndef OPENSSL_NO_DSA |
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158 int dsaparam=0; |
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159 #endif |
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160 BIO *in=NULL,*out=NULL; |
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161 int informat,outformat,check=0,noout=0,C=0,ret=1; |
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162 char *infile,*outfile,*prog; |
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163 char *inrand=NULL; |
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164 #ifndef OPENSSL_NO_ENGINE |
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165 char *engine=NULL; |
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166 #endif |
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167 int num = 0, g = 0; |
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168 |
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169 apps_startup(); |
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170 |
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171 if (bio_err == NULL) |
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172 if ((bio_err=BIO_new(BIO_s_file())) != NULL) |
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173 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); |
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174 |
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175 |
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176 if (!load_config(bio_err, NULL)) |
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177 goto end; |
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178 |
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179 infile=NULL; |
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180 outfile=NULL; |
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181 informat=FORMAT_PEM; |
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182 outformat=FORMAT_PEM; |
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183 |
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184 prog=argv[0]; |
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185 argc--; |
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186 argv++; |
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187 while (argc >= 1) |
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188 { |
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189 if (strcmp(*argv,"-inform") == 0) |
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190 { |
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191 if (--argc < 1) goto bad; |
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192 informat=str2fmt(*(++argv)); |
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193 } |
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194 else if (strcmp(*argv,"-outform") == 0) |
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195 { |
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196 if (--argc < 1) goto bad; |
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197 outformat=str2fmt(*(++argv)); |
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198 } |
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199 else if (strcmp(*argv,"-in") == 0) |
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200 { |
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201 if (--argc < 1) goto bad; |
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202 infile= *(++argv); |
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203 } |
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204 else if (strcmp(*argv,"-out") == 0) |
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205 { |
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206 if (--argc < 1) goto bad; |
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207 outfile= *(++argv); |
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208 } |
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209 #ifndef OPENSSL_NO_ENGINE |
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210 else if (strcmp(*argv,"-engine") == 0) |
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211 { |
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212 if (--argc < 1) goto bad; |
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213 engine= *(++argv); |
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214 } |
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215 #endif |
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216 else if (strcmp(*argv,"-check") == 0) |
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217 check=1; |
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218 else if (strcmp(*argv,"-text") == 0) |
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219 text=1; |
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220 #ifndef OPENSSL_NO_DSA |
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221 else if (strcmp(*argv,"-dsaparam") == 0) |
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222 dsaparam=1; |
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223 #endif |
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224 else if (strcmp(*argv,"-C") == 0) |
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225 C=1; |
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226 else if (strcmp(*argv,"-noout") == 0) |
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227 noout=1; |
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228 else if (strcmp(*argv,"-2") == 0) |
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229 g=2; |
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230 else if (strcmp(*argv,"-5") == 0) |
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231 g=5; |
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232 else if (strcmp(*argv,"-rand") == 0) |
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233 { |
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234 if (--argc < 1) goto bad; |
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235 inrand= *(++argv); |
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236 } |
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237 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) |
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238 goto bad; |
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239 argv++; |
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240 argc--; |
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241 } |
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242 |
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243 if (badops) |
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244 { |
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245 bad: |
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246 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); |
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247 BIO_printf(bio_err,"where options are\n"); |
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248 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); |
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249 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); |
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250 BIO_printf(bio_err," -in arg input file\n"); |
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251 BIO_printf(bio_err," -out arg output file\n"); |
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252 #ifndef OPENSSL_NO_DSA |
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253 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n"); |
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254 #endif |
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255 BIO_printf(bio_err," -check check the DH parameters\n"); |
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256 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); |
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257 BIO_printf(bio_err," -C Output C code\n"); |
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258 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); |
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259 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); |
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260 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); |
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261 #ifndef OPENSSL_NO_ENGINE |
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262 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); |
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263 #endif |
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264 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); |
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265 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); |
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266 BIO_printf(bio_err," the random number generator\n"); |
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267 BIO_printf(bio_err," -noout no output\n"); |
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268 goto end; |
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269 } |
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270 |
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271 ERR_load_crypto_strings(); |
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272 |
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273 #ifndef OPENSSL_NO_ENGINE |
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274 e = setup_engine(bio_err, engine, 0); |
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275 #endif |
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276 |
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277 if (g && !num) |
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278 num = DEFBITS; |
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279 |
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280 #ifndef OPENSSL_NO_DSA |
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281 if (dsaparam) |
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282 { |
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283 if (g) |
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284 { |
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285 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); |
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286 goto end; |
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287 } |
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288 } |
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289 else |
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290 #endif |
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291 { |
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292 /* DH parameters */ |
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293 if (num && !g) |
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294 g = 2; |
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295 } |
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296 |
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297 if(num) { |
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298 |
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299 BN_GENCB cb; |
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300 BN_GENCB_set(&cb, dh_cb, bio_err); |
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301 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) |
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302 { |
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303 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); |
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304 } |
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305 if (inrand != NULL) |
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306 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", |
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307 app_RAND_load_files(inrand)); |
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308 |
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309 #ifndef OPENSSL_NO_DSA |
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310 if (dsaparam) |
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311 { |
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312 DSA *dsa = DSA_new(); |
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313 |
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314 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); |
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315 if(!dsa || !DSA_generate_parameters_ex(dsa, num, |
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316 NULL, 0, NULL, NULL, &cb)) |
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317 { |
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318 if(dsa) DSA_free(dsa); |
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319 ERR_print_errors(bio_err); |
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320 goto end; |
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321 } |
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322 |
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323 dh = DSA_dup_DH(dsa); |
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324 DSA_free(dsa); |
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325 if (dh == NULL) |
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326 { |
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327 ERR_print_errors(bio_err); |
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328 goto end; |
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329 } |
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330 } |
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331 else |
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332 #endif |
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333 { |
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334 dh = DH_new(); |
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335 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); |
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336 BIO_printf(bio_err,"This is going to take a long time\n"); |
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337 if(!dh || !DH_generate_parameters_ex(dh, num, g, &cb)) |
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338 { |
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339 if(dh) DH_free(dh); |
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340 ERR_print_errors(bio_err); |
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341 goto end; |
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342 } |
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343 } |
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344 |
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345 app_RAND_write_file(NULL, bio_err); |
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346 } else { |
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347 |
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348 in=BIO_new(BIO_s_file()); |
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349 if (in == NULL) |
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350 { |
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351 ERR_print_errors(bio_err); |
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352 goto end; |
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353 } |
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354 if (infile == NULL) |
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355 BIO_set_fp(in,stdin,BIO_NOCLOSE); |
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356 |
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357 else |
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358 { |
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359 if (BIO_read_filename(in,infile) <= 0) |
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360 { |
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361 perror(infile); |
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362 goto end; |
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363 } |
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364 } |
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365 |
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366 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) |
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367 { |
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368 BIO_printf(bio_err,"bad input format specified\n"); |
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369 goto end; |
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370 } |
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371 |
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372 #ifndef OPENSSL_NO_DSA |
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373 if (dsaparam) |
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374 { |
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375 DSA *dsa; |
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376 |
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377 if (informat == FORMAT_ASN1) |
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378 dsa=d2i_DSAparams_bio(in,NULL); |
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379 else /* informat == FORMAT_PEM */ |
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380 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); |
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381 |
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382 if (dsa == NULL) |
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383 { |
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384 BIO_printf(bio_err,"unable to load DSA parameters\n"); |
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385 ERR_print_errors(bio_err); |
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386 goto end; |
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387 } |
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388 |
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389 dh = DSA_dup_DH(dsa); |
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390 DSA_free(dsa); |
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391 if (dh == NULL) |
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392 { |
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393 ERR_print_errors(bio_err); |
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394 goto end; |
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395 } |
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396 } |
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397 else |
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398 #endif |
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399 { |
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400 if (informat == FORMAT_ASN1) |
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401 dh=d2i_DHparams_bio(in,NULL); |
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402 else /* informat == FORMAT_PEM */ |
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403 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); |
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404 |
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405 if (dh == NULL) |
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406 { |
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407 BIO_printf(bio_err,"unable to load DH parameters\n"); |
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408 ERR_print_errors(bio_err); |
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409 goto end; |
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410 } |
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411 } |
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412 |
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413 /* dh != NULL */ |
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414 } |
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415 |
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416 out=BIO_new(BIO_s_file()); |
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417 if (out == NULL) |
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418 { |
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419 ERR_print_errors(bio_err); |
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420 goto end; |
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421 } |
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422 if (outfile == NULL) |
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423 { |
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424 BIO_set_fp(out,stdout,BIO_NOCLOSE); |
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425 #ifdef OPENSSL_SYS_VMS |
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426 { |
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427 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); |
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428 out = BIO_push(tmpbio, out); |
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429 } |
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430 #endif |
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431 } |
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432 else |
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433 { |
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434 if (BIO_write_filename(out,outfile) <= 0) |
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435 { |
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436 perror(outfile); |
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437 goto end; |
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438 } |
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439 } |
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440 |
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441 |
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442 if (text) |
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443 { |
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444 DHparams_print(out,dh); |
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445 } |
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446 |
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447 if (check) |
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448 { |
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449 if (!DH_check(dh,&i)) |
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450 { |
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451 ERR_print_errors(bio_err); |
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452 goto end; |
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453 } |
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454 |
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455 if (i & DH_CHECK_P_NOT_PRIME) |
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456 printf("p value is not prime\n"); |
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457 if (i & DH_CHECK_P_NOT_SAFE_PRIME) |
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458 printf("p value is not a safe prime\n"); |
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459 if (i & DH_UNABLE_TO_CHECK_GENERATOR) |
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460 printf("unable to check the generator value\n"); |
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461 if (i & DH_NOT_SUITABLE_GENERATOR) |
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462 printf("the g value is not a generator\n"); |
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463 if (i == 0) |
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464 printf("DH parameters appear to be ok.\n"); |
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465 |
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466 } |
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467 if (C) |
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468 { |
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469 unsigned char *data; |
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470 int len,l,bits; |
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471 |
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472 len=BN_num_bytes(dh->p); |
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473 bits=BN_num_bits(dh->p); |
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474 data=(unsigned char *)OPENSSL_malloc(len); |
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475 if (data == NULL) |
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476 { |
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477 perror("OPENSSL_malloc"); |
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478 goto end; |
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479 } |
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480 printf("#ifndef HEADER_DH_H\n" |
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481 "#include <openssl/dh.h>\n" |
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482 "#endif\n"); |
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483 printf("DH *get_dh%d()\n\t{\n",bits); |
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484 |
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485 l=BN_bn2bin(dh->p,data); |
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486 printf("\tstatic unsigned char dh%d_p[]={",bits); |
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487 for (i=0; i<l; i++) |
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488 { |
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489 if ((i%12) == 0) printf("\n\t\t"); |
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490 printf("0x%02X,",data[i]); |
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491 } |
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492 printf("\n\t\t};\n"); |
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493 |
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494 l=BN_bn2bin(dh->g,data); |
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495 printf("\tstatic unsigned char dh%d_g[]={",bits); |
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496 for (i=0; i<l; i++) |
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497 { |
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498 if ((i%12) == 0) printf("\n\t\t"); |
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499 printf("0x%02X,",data[i]); |
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500 } |
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501 printf("\n\t\t};\n"); |
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502 |
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503 printf("\tDH *dh;\n\n"); |
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504 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); |
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505 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", |
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506 bits,bits); |
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507 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", |
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508 bits,bits); |
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509 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); |
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510 printf("\t\t{ DH_free(dh); return(NULL); }\n"); |
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511 if (dh->length) |
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512 printf("\tdh->length = %ld;\n", dh->length); |
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513 printf("\treturn(dh);\n\t}\n"); |
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514 |
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515 OPENSSL_free(data); |
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516 } |
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517 |
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518 |
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519 if (!noout) |
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520 { |
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521 if (outformat == FORMAT_ASN1) |
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522 i=i2d_DHparams_bio(out,dh); |
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523 else if (outformat == FORMAT_PEM) |
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524 i=PEM_write_bio_DHparams(out,dh); |
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525 else { |
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526 BIO_printf(bio_err,"bad output format specified for outfile\n"); |
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527 goto end; |
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528 } |
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529 if (!i) |
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530 { |
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531 BIO_printf(bio_err,"unable to write DH parameters\n"); |
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532 ERR_print_errors(bio_err); |
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533 goto end; |
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534 } |
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535 } |
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536 ret=0; |
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537 end: |
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538 if (in != NULL) BIO_free(in); |
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539 if (out != NULL) BIO_free_all(out); |
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540 if (dh != NULL) DH_free(dh); |
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541 apps_shutdown(); |
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542 OPENSSL_EXIT(ret); |
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543 } |
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544 |
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545 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */ |
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546 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) |
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547 { |
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548 char c='*'; |
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549 |
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550 if (p == 0) c='.'; |
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551 if (p == 1) c='+'; |
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552 if (p == 2) c='*'; |
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553 if (p == 3) c='\n'; |
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554 BIO_write(cb->arg,&c,1); |
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555 (void)BIO_flush(cb->arg); |
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556 #ifdef LINT |
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557 p=n; |
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558 #endif |
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559 return 1; |
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560 } |
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561 |
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562 #endif |