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 | #ifndef OPENSSL_NO_DH |
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61 | #include <stdio.h> |
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62 | #include <stdlib.h> |
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63 | #include <time.h> |
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64 | #include <string.h> |
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65 | #include "apps.h" |
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66 | #include <openssl/bio.h> |
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67 | #include <openssl/err.h> |
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68 | #include <openssl/bn.h> |
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69 | #include <openssl/dh.h> |
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70 | #include <openssl/x509.h> |
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71 | #include <openssl/pem.h> |
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72 | |
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73 | #undef PROG |
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74 | #define PROG dh_main |
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75 | |
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76 | /* -inform arg - input format - default PEM (DER or PEM) |
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77 | * -outform arg - output format - default PEM |
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78 | * -in arg - input file - default stdin |
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79 | * -out arg - output file - default stdout |
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80 | * -check - check the parameters are ok |
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81 | * -noout |
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82 | * -text |
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83 | * -C |
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84 | */ |
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85 | |
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86 | int MAIN(int, char **); |
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87 | |
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88 | int MAIN(int argc, char **argv) |
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89 | { |
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90 | ENGINE *e = NULL; |
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91 | DH *dh=NULL; |
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92 | int i,badops=0,text=0; |
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93 | BIO *in=NULL,*out=NULL; |
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94 | int informat,outformat,check=0,noout=0,C=0,ret=1; |
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95 | char *infile,*outfile,*prog,*engine; |
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96 | |
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97 | apps_startup(); |
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98 | |
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99 | if (bio_err == NULL) |
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100 | if ((bio_err=BIO_new(BIO_s_file())) != NULL) |
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101 | BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); |
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102 | |
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103 | if (!load_config(bio_err, NULL)) |
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104 | goto end; |
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105 | |
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106 | engine=NULL; |
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107 | infile=NULL; |
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108 | outfile=NULL; |
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109 | informat=FORMAT_PEM; |
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110 | outformat=FORMAT_PEM; |
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111 | |
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112 | prog=argv[0]; |
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113 | argc--; |
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114 | argv++; |
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115 | while (argc >= 1) |
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116 | { |
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117 | if (strcmp(*argv,"-inform") == 0) |
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118 | { |
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119 | if (--argc < 1) goto bad; |
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120 | informat=str2fmt(*(++argv)); |
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121 | } |
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122 | else if (strcmp(*argv,"-outform") == 0) |
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123 | { |
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124 | if (--argc < 1) goto bad; |
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125 | outformat=str2fmt(*(++argv)); |
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126 | } |
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127 | else if (strcmp(*argv,"-in") == 0) |
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128 | { |
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129 | if (--argc < 1) goto bad; |
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130 | infile= *(++argv); |
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131 | } |
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132 | else if (strcmp(*argv,"-out") == 0) |
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133 | { |
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134 | if (--argc < 1) goto bad; |
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135 | outfile= *(++argv); |
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136 | } |
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137 | else if (strcmp(*argv,"-engine") == 0) |
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138 | { |
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139 | if (--argc < 1) goto bad; |
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140 | engine= *(++argv); |
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141 | } |
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142 | else if (strcmp(*argv,"-check") == 0) |
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143 | check=1; |
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144 | else if (strcmp(*argv,"-text") == 0) |
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145 | text=1; |
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146 | else if (strcmp(*argv,"-C") == 0) |
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147 | C=1; |
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148 | else if (strcmp(*argv,"-noout") == 0) |
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149 | noout=1; |
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150 | else |
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151 | { |
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152 | BIO_printf(bio_err,"unknown option %s\n",*argv); |
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153 | badops=1; |
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154 | break; |
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155 | } |
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156 | argc--; |
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157 | argv++; |
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158 | } |
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159 | |
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160 | if (badops) |
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161 | { |
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162 | bad: |
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163 | BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog); |
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164 | BIO_printf(bio_err,"where options are\n"); |
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165 | BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); |
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166 | BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); |
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167 | BIO_printf(bio_err," -in arg input file\n"); |
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168 | BIO_printf(bio_err," -out arg output file\n"); |
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169 | BIO_printf(bio_err," -check check the DH parameters\n"); |
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170 | BIO_printf(bio_err," -text print a text form of the DH parameters\n"); |
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171 | BIO_printf(bio_err," -C Output C code\n"); |
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172 | BIO_printf(bio_err," -noout no output\n"); |
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173 | BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); |
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174 | goto end; |
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175 | } |
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176 | |
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177 | ERR_load_crypto_strings(); |
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178 | |
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179 | e = setup_engine(bio_err, engine, 0); |
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180 | |
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181 | in=BIO_new(BIO_s_file()); |
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182 | out=BIO_new(BIO_s_file()); |
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183 | if ((in == NULL) || (out == NULL)) |
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184 | { |
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185 | ERR_print_errors(bio_err); |
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186 | goto end; |
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187 | } |
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188 | |
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189 | if (infile == NULL) |
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190 | BIO_set_fp(in,stdin,BIO_NOCLOSE); |
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191 | else |
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192 | { |
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193 | if (BIO_read_filename(in,infile) <= 0) |
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194 | { |
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195 | perror(infile); |
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196 | goto end; |
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197 | } |
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198 | } |
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199 | if (outfile == NULL) |
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200 | { |
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201 | BIO_set_fp(out,stdout,BIO_NOCLOSE); |
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202 | #ifdef OPENSSL_SYS_VMS |
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203 | { |
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204 | BIO *tmpbio = BIO_new(BIO_f_linebuffer()); |
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205 | out = BIO_push(tmpbio, out); |
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206 | } |
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207 | #endif |
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208 | } |
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209 | else |
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210 | { |
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211 | if (BIO_write_filename(out,outfile) <= 0) |
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212 | { |
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213 | perror(outfile); |
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214 | goto end; |
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215 | } |
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216 | } |
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217 | |
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218 | if (informat == FORMAT_ASN1) |
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219 | dh=d2i_DHparams_bio(in,NULL); |
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220 | else if (informat == FORMAT_PEM) |
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221 | dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); |
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222 | else |
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223 | { |
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224 | BIO_printf(bio_err,"bad input format specified\n"); |
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225 | goto end; |
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226 | } |
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227 | if (dh == NULL) |
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228 | { |
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229 | BIO_printf(bio_err,"unable to load DH parameters\n"); |
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230 | ERR_print_errors(bio_err); |
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231 | goto end; |
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232 | } |
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233 | |
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234 | |
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235 | |
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236 | if (text) |
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237 | { |
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238 | DHparams_print(out,dh); |
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239 | #ifdef undef |
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240 | printf("p="); |
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241 | BN_print(stdout,dh->p); |
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242 | printf("\ng="); |
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243 | BN_print(stdout,dh->g); |
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244 | printf("\n"); |
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245 | if (dh->length != 0) |
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246 | printf("recommended private length=%ld\n",dh->length); |
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247 | #endif |
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248 | } |
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249 | |
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250 | if (check) |
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251 | { |
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252 | if (!DH_check(dh,&i)) |
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253 | { |
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254 | ERR_print_errors(bio_err); |
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255 | goto end; |
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256 | } |
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257 | if (i & DH_CHECK_P_NOT_PRIME) |
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258 | printf("p value is not prime\n"); |
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259 | if (i & DH_CHECK_P_NOT_SAFE_PRIME) |
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260 | printf("p value is not a safe prime\n"); |
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261 | if (i & DH_UNABLE_TO_CHECK_GENERATOR) |
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262 | printf("unable to check the generator value\n"); |
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263 | if (i & DH_NOT_SUITABLE_GENERATOR) |
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264 | printf("the g value is not a generator\n"); |
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265 | if (i == 0) |
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266 | printf("DH parameters appear to be ok.\n"); |
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267 | } |
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268 | if (C) |
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269 | { |
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270 | unsigned char *data; |
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271 | int len,l,bits; |
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272 | |
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273 | len=BN_num_bytes(dh->p); |
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274 | bits=BN_num_bits(dh->p); |
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275 | data=(unsigned char *)OPENSSL_malloc(len); |
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276 | if (data == NULL) |
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277 | { |
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278 | perror("OPENSSL_malloc"); |
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279 | goto end; |
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280 | } |
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281 | l=BN_bn2bin(dh->p,data); |
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282 | printf("static unsigned char dh%d_p[]={",bits); |
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283 | for (i=0; i<l; i++) |
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284 | { |
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285 | if ((i%12) == 0) printf("\n\t"); |
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286 | printf("0x%02X,",data[i]); |
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287 | } |
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288 | printf("\n\t};\n"); |
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289 | |
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290 | l=BN_bn2bin(dh->g,data); |
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291 | printf("static unsigned char dh%d_g[]={",bits); |
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292 | for (i=0; i<l; i++) |
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293 | { |
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294 | if ((i%12) == 0) printf("\n\t"); |
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295 | printf("0x%02X,",data[i]); |
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296 | } |
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297 | printf("\n\t};\n\n"); |
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298 | |
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299 | printf("DH *get_dh%d()\n\t{\n",bits); |
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300 | printf("\tDH *dh;\n\n"); |
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301 | printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); |
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302 | printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", |
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303 | bits,bits); |
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304 | printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", |
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305 | bits,bits); |
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306 | printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); |
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307 | printf("\t\treturn(NULL);\n"); |
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308 | printf("\treturn(dh);\n\t}\n"); |
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309 | OPENSSL_free(data); |
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310 | } |
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311 | |
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312 | |
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313 | if (!noout) |
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314 | { |
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315 | if (outformat == FORMAT_ASN1) |
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316 | i=i2d_DHparams_bio(out,dh); |
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317 | else if (outformat == FORMAT_PEM) |
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318 | i=PEM_write_bio_DHparams(out,dh); |
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319 | else { |
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320 | BIO_printf(bio_err,"bad output format specified for outfile\n"); |
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321 | goto end; |
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322 | } |
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323 | if (!i) |
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324 | { |
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325 | BIO_printf(bio_err,"unable to write DH parameters\n"); |
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326 | ERR_print_errors(bio_err); |
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327 | goto end; |
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328 | } |
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329 | } |
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330 | ret=0; |
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331 | end: |
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332 | if (in != NULL) BIO_free(in); |
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333 | if (out != NULL) BIO_free_all(out); |
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334 | if (dh != NULL) DH_free(dh); |
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335 | apps_shutdown(); |
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336 | OPENSSL_EXIT(ret); |
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337 | } |
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338 | #endif |
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