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1 /* apps/dh.c */ |
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2 /* obsoleted by dhparam.c */ |
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3 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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4 * All rights reserved. |
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5 * |
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6 * This package is an SSL implementation written |
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7 * by Eric Young (eay@cryptsoft.com). |
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8 * The implementation was written so as to conform with Netscapes SSL. |
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9 * |
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10 * This library is free for commercial and non-commercial use as long as |
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11 * the following conditions are aheared to. The following conditions |
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12 * apply to all code found in this distribution, be it the RC4, RSA, |
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13 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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14 * included with this distribution is covered by the same copyright terms |
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15 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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16 * |
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17 * Copyright remains Eric Young's, and as such any Copyright notices in |
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18 * the code are not to be removed. |
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19 * If this package is used in a product, Eric Young should be given attribution |
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20 * as the author of the parts of the library used. |
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21 * This can be in the form of a textual message at program startup or |
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22 * in documentation (online or textual) provided with the package. |
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23 * |
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24 * Redistribution and use in source and binary forms, with or without |
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25 * modification, are permitted provided that the following conditions |
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26 * are met: |
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27 * 1. Redistributions of source code must retain the copyright |
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28 * notice, this list of conditions and the following disclaimer. |
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29 * 2. Redistributions in binary form must reproduce the above copyright |
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30 * notice, this list of conditions and the following disclaimer in the |
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31 * documentation and/or other materials provided with the distribution. |
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32 * 3. All advertising materials mentioning features or use of this software |
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33 * must display the following acknowledgement: |
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34 * "This product includes cryptographic software written by |
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35 * Eric Young (eay@cryptsoft.com)" |
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36 * The word 'cryptographic' can be left out if the rouines from the library |
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37 * being used are not cryptographic related :-). |
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38 * 4. If you include any Windows specific code (or a derivative thereof) from |
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39 * the apps directory (application code) you must include an acknowledgement: |
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40 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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41 * |
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42 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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45 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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52 * SUCH DAMAGE. |
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53 * |
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54 * The licence and distribution terms for any publically available version or |
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55 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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56 * copied and put under another distribution licence |
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57 * [including the GNU Public Licence.] |
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58 */ |
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59 |
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60 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */ |
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61 #ifndef OPENSSL_NO_DH |
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62 #include <stdio.h> |
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63 #include <stdlib.h> |
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64 #include <time.h> |
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65 #include <string.h> |
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66 #include "apps.h" |
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67 #include <openssl/bio.h> |
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68 #include <openssl/err.h> |
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69 #include <openssl/bn.h> |
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70 #include <openssl/dh.h> |
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71 #include <openssl/x509.h> |
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72 #include <openssl/pem.h> |
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73 |
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74 #undef PROG |
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75 #define PROG dh_main |
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76 |
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77 /* -inform arg - input format - default PEM (DER or PEM) |
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78 * -outform arg - output format - default PEM |
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79 * -in arg - input file - default stdin |
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80 * -out arg - output file - default stdout |
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81 * -check - check the parameters are ok |
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82 * -noout |
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83 * -text |
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84 * -C |
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85 */ |
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86 |
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87 |
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88 int MAIN(int, char **); |
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89 |
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90 int MAIN(int argc, char **argv) |
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91 { |
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92 #ifndef OPENSSL_NO_ENGINE |
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93 ENGINE *e = NULL; |
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94 #endif |
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95 DH *dh=NULL; |
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96 int i,badops=0,text=0; |
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97 BIO *in=NULL,*out=NULL; |
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98 int informat,outformat,check=0,noout=0,C=0,ret=1; |
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99 char *infile,*outfile,*prog; |
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100 #ifndef OPENSSL_NO_ENGINE |
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101 char *engine; |
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102 #endif |
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103 |
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104 apps_startup(); |
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105 |
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106 if (bio_err == NULL) |
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107 if ((bio_err=BIO_new(BIO_s_file())) != NULL) |
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108 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); |
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109 |
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110 if (!load_config(bio_err, NULL)) |
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111 goto end; |
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112 |
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113 #ifndef OPENSSL_NO_ENGINE |
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114 engine=NULL; |
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115 #endif |
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116 infile=NULL; |
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117 outfile=NULL; |
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118 informat=FORMAT_PEM; |
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119 outformat=FORMAT_PEM; |
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120 |
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121 prog=argv[0]; |
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122 argc--; |
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123 argv++; |
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124 while (argc >= 1) |
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125 { |
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126 if (strcmp(*argv,"-inform") == 0) |
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127 { |
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128 if (--argc < 1) goto bad; |
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129 informat=str2fmt(*(++argv)); |
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130 } |
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131 else if (strcmp(*argv,"-outform") == 0) |
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132 { |
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133 if (--argc < 1) goto bad; |
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134 outformat=str2fmt(*(++argv)); |
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135 } |
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136 else if (strcmp(*argv,"-in") == 0) |
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137 { |
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138 if (--argc < 1) goto bad; |
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139 infile= *(++argv); |
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140 } |
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141 else if (strcmp(*argv,"-out") == 0) |
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142 { |
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143 if (--argc < 1) goto bad; |
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144 outfile= *(++argv); |
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145 } |
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146 #ifndef OPENSSL_NO_ENGINE |
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147 else if (strcmp(*argv,"-engine") == 0) |
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148 { |
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149 if (--argc < 1) goto bad; |
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150 engine= *(++argv); |
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151 } |
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152 #endif |
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153 else if (strcmp(*argv,"-check") == 0) |
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154 check=1; |
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155 else if (strcmp(*argv,"-text") == 0) |
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156 text=1; |
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157 else if (strcmp(*argv,"-C") == 0) |
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158 C=1; |
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159 else if (strcmp(*argv,"-noout") == 0) |
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160 noout=1; |
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161 else |
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162 { |
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163 BIO_printf(bio_err,"unknown option %s\n",*argv); |
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164 badops=1; |
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165 break; |
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166 } |
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167 argc--; |
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168 argv++; |
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169 } |
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170 |
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171 if (badops) |
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172 { |
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173 bad: |
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174 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog); |
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175 BIO_printf(bio_err,"where options are\n"); |
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176 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); |
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177 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); |
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178 BIO_printf(bio_err," -in arg input file\n"); |
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179 BIO_printf(bio_err," -out arg output file\n"); |
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180 BIO_printf(bio_err," -check check the DH parameters\n"); |
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181 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); |
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182 BIO_printf(bio_err," -C Output C code\n"); |
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183 BIO_printf(bio_err," -noout no output\n"); |
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184 #ifndef OPENSSL_NO_ENGINE |
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185 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); |
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186 #endif |
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187 goto end; |
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188 } |
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189 |
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190 ERR_load_crypto_strings(); |
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191 |
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192 #ifndef OPENSSL_NO_ENGINE |
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193 e = setup_engine(bio_err, engine, 0); |
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194 #endif |
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195 |
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196 in=BIO_new(BIO_s_file()); |
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197 out=BIO_new(BIO_s_file()); |
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198 if ((in == NULL) || (out == NULL)) |
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199 { |
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200 ERR_print_errors(bio_err); |
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201 goto end; |
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202 } |
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203 |
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204 if (infile == NULL) |
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205 BIO_set_fp(in,stdin,BIO_NOCLOSE); |
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206 |
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207 else |
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208 { |
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209 if (BIO_read_filename(in,infile) <= 0) |
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210 { |
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211 perror(infile); |
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212 goto end; |
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213 } |
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214 } |
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215 if (outfile == NULL) |
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216 { |
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217 BIO_set_fp(out,stdout,BIO_NOCLOSE); |
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218 #ifdef OPENSSL_SYS_VMS |
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219 { |
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220 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); |
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221 out = BIO_push(tmpbio, out); |
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222 } |
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223 #endif |
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224 } |
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225 else |
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226 { |
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227 if (BIO_write_filename(out,outfile) <= 0) |
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228 { |
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229 perror(outfile); |
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230 goto end; |
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231 } |
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232 } |
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233 |
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234 if (informat == FORMAT_ASN1) |
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235 dh=d2i_DHparams_bio(in,NULL); |
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236 else if (informat == FORMAT_PEM) |
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237 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); |
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238 else |
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239 { |
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240 BIO_printf(bio_err,"bad input format specified\n"); |
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241 goto end; |
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242 } |
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243 if (dh == NULL) |
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244 { |
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245 BIO_printf(bio_err,"unable to load DH parameters\n"); |
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246 ERR_print_errors(bio_err); |
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247 goto end; |
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248 } |
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249 |
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250 |
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251 |
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252 if (text) |
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253 { |
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254 DHparams_print(out,dh); |
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255 #ifdef undef |
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256 printf("p="); |
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257 BN_print(stdout,dh->p); |
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258 printf("\ng="); |
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259 BN_print(stdout,dh->g); |
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260 printf("\n"); |
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261 if (dh->length != 0) |
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262 printf("recommended private length=%ld\n",dh->length); |
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263 #endif |
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264 } |
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265 |
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266 if (check) |
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267 { |
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268 if (!DH_check(dh,&i)) |
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269 { |
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270 ERR_print_errors(bio_err); |
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271 goto end; |
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272 } |
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273 if (i & DH_CHECK_P_NOT_PRIME) |
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274 printf("p value is not prime\n"); |
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275 if (i & DH_CHECK_P_NOT_SAFE_PRIME) |
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276 printf("p value is not a safe prime\n"); |
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277 if (i & DH_UNABLE_TO_CHECK_GENERATOR) |
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278 printf("unable to check the generator value\n"); |
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279 if (i & DH_NOT_SUITABLE_GENERATOR) |
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280 printf("the g value is not a generator\n"); |
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281 if (i == 0) |
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282 printf("DH parameters appear to be ok.\n"); |
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283 |
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284 } |
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285 if (C) |
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286 { |
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287 unsigned char *data; |
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288 int len,l,bits; |
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289 |
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290 len=BN_num_bytes(dh->p); |
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291 bits=BN_num_bits(dh->p); |
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292 data=(unsigned char *)OPENSSL_malloc(len); |
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293 if (data == NULL) |
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294 { |
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295 perror("OPENSSL_malloc"); |
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296 goto end; |
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297 } |
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298 l=BN_bn2bin(dh->p,data); |
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299 printf("static unsigned char dh%d_p[]={",bits); |
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300 for (i=0; i<l; i++) |
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301 { |
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302 if ((i%12) == 0) printf("\n\t"); |
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303 printf("0x%02X,",data[i]); |
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304 } |
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305 printf("\n\t};\n"); |
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306 |
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307 l=BN_bn2bin(dh->g,data); |
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308 printf("static unsigned char dh%d_g[]={",bits); |
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309 for (i=0; i<l; i++) |
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310 { |
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311 if ((i%12) == 0) printf("\n\t"); |
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312 printf("0x%02X,",data[i]); |
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313 } |
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314 printf("\n\t};\n\n"); |
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315 |
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316 printf("DH *get_dh%d()\n\t{\n",bits); |
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317 printf("\tDH *dh;\n\n"); |
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318 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); |
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319 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", |
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320 bits,bits); |
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321 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", |
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322 bits,bits); |
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323 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); |
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324 printf("\t\treturn(NULL);\n"); |
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325 printf("\treturn(dh);\n\t}\n"); |
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326 OPENSSL_free(data); |
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327 } |
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328 |
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329 |
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330 if (!noout) |
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331 { |
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332 if (outformat == FORMAT_ASN1) |
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333 i=i2d_DHparams_bio(out,dh); |
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334 else if (outformat == FORMAT_PEM) |
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335 i=PEM_write_bio_DHparams(out,dh); |
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336 else { |
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337 BIO_printf(bio_err,"bad output format specified for outfile\n"); |
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338 goto end; |
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339 } |
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340 if (!i) |
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341 { |
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342 BIO_printf(bio_err,"unable to write DH parameters\n"); |
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343 ERR_print_errors(bio_err); |
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344 goto end; |
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345 } |
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346 } |
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347 ret=0; |
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348 end: |
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349 if (in != NULL) BIO_free(in); |
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350 if (out != NULL) BIO_free_all(out); |
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351 if (dh != NULL) DH_free(dh); |
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352 apps_shutdown(); |
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353 OPENSSL_EXIT(ret); |
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354 } |
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355 #endif |