1 | /*
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2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | #if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC
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11 | # define NO_MD5CRYPT_1
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12 | #endif
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13 |
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14 | #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)
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15 |
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16 | # include <string.h>
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17 |
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18 | # include "apps.h"
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19 |
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20 | # include <openssl/bio.h>
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21 | # include <openssl/err.h>
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22 | # include <openssl/evp.h>
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23 | # include <openssl/rand.h>
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24 | # ifndef OPENSSL_NO_DES
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25 | # include <openssl/des.h>
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26 | # endif
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27 | # ifndef NO_MD5CRYPT_1
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28 | # include <openssl/md5.h>
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29 | # endif
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30 |
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31 | static unsigned const char cov_2char[64] = {
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32 | /* from crypto/des/fcrypt.c */
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33 | 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
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34 | 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
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35 | 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
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36 | 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
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37 | 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
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38 | 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
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39 | 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
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40 | 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
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41 | };
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42 |
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43 | static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
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44 | char *passwd, BIO *out, int quiet, int table,
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45 | int reverse, size_t pw_maxlen, int usecrypt, int use1,
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46 | int useapr1);
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47 |
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48 | typedef enum OPTION_choice {
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49 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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50 | OPT_IN,
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51 | OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
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52 | OPT_1, OPT_CRYPT, OPT_SALT, OPT_STDIN
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53 | } OPTION_CHOICE;
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54 |
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55 | OPTIONS passwd_options[] = {
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56 | {"help", OPT_HELP, '-', "Display this summary"},
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57 | {"in", OPT_IN, '<', "Pead passwords from file"},
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58 | {"noverify", OPT_NOVERIFY, '-',
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59 | "Never verify when reading password from terminal"},
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60 | {"quiet", OPT_QUIET, '-', "No warnings"},
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61 | {"table", OPT_TABLE, '-', "Format output as table"},
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62 | {"reverse", OPT_REVERSE, '-', "Switch table columns"},
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63 | {"salt", OPT_SALT, 's', "Use provided salt"},
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64 | {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
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65 | # ifndef NO_MD5CRYPT_1
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66 | {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
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67 | {"1", OPT_1, '-', "MD5-based password algorithm"},
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68 | # endif
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69 | # ifndef OPENSSL_NO_DES
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70 | {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
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71 | # endif
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72 | {NULL}
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73 | };
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74 |
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75 | int passwd_main(int argc, char **argv)
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76 | {
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77 | BIO *in = NULL;
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78 | char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
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79 | char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
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80 | OPTION_CHOICE o;
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81 | int in_stdin = 0, pw_source_defined = 0;
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82 | #ifndef OPENSSL_NO_UI
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83 | int in_noverify = 0;
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84 | #endif
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85 | int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
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86 | int ret = 1, usecrypt = 0, use1 = 0, useapr1 = 0;
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87 | size_t passwd_malloc_size = 0, pw_maxlen = 256;
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88 |
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89 | prog = opt_init(argc, argv, passwd_options);
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90 | while ((o = opt_next()) != OPT_EOF) {
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91 | switch (o) {
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92 | case OPT_EOF:
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93 | case OPT_ERR:
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94 | opthelp:
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95 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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96 | goto end;
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97 | case OPT_HELP:
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98 | opt_help(passwd_options);
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99 | ret = 0;
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100 | goto end;
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101 | case OPT_IN:
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102 | if (pw_source_defined)
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103 | goto opthelp;
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104 | infile = opt_arg();
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105 | pw_source_defined = 1;
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106 | break;
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107 | case OPT_NOVERIFY:
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108 | #ifndef OPENSSL_NO_UI
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109 | in_noverify = 1;
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110 | #endif
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111 | break;
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112 | case OPT_QUIET:
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113 | quiet = 1;
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114 | break;
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115 | case OPT_TABLE:
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116 | table = 1;
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117 | break;
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118 | case OPT_REVERSE:
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119 | reverse = 1;
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120 | break;
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121 | case OPT_1:
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122 | use1 = 1;
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123 | break;
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124 | case OPT_APR1:
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125 | useapr1 = 1;
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126 | break;
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127 | case OPT_CRYPT:
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128 | usecrypt = 1;
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129 | break;
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130 | case OPT_SALT:
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131 | passed_salt = 1;
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132 | salt = opt_arg();
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133 | break;
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134 | case OPT_STDIN:
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135 | if (pw_source_defined)
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136 | goto opthelp;
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137 | in_stdin = 1;
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138 | pw_source_defined = 1;
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139 | break;
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140 | }
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141 | }
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142 | argc = opt_num_rest();
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143 | argv = opt_rest();
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144 |
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145 | if (*argv) {
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146 | if (pw_source_defined)
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147 | goto opthelp;
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148 | pw_source_defined = 1;
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149 | passwds = argv;
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150 | }
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151 |
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152 | if (!usecrypt && !use1 && !useapr1) {
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153 | /* use default */
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154 | usecrypt = 1;
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155 | }
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156 | if (usecrypt + use1 + useapr1 > 1) {
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157 | /* conflict */
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158 | goto opthelp;
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159 | }
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160 |
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161 | # ifdef OPENSSL_NO_DES
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162 | if (usecrypt)
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163 | goto opthelp;
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164 | # endif
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165 | # ifdef NO_MD5CRYPT_1
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166 | if (use1 || useapr1)
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167 | goto opthelp;
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168 | # endif
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169 |
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170 | if (infile != NULL && in_stdin) {
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171 | BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
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172 | goto end;
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173 | }
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174 |
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175 | if (infile != NULL || in_stdin) {
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176 | /*
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177 | * If in_stdin is true, we know that infile is NULL, and that
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178 | * bio_open_default() will give us back an alias for stdin.
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179 | */
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180 | in = bio_open_default(infile, 'r', FORMAT_TEXT);
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181 | if (in == NULL)
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182 | goto end;
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183 | }
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184 |
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185 | if (usecrypt)
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186 | pw_maxlen = 8;
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187 | else if (use1 || useapr1)
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188 | pw_maxlen = 256; /* arbitrary limit, should be enough for most
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189 | * passwords */
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190 |
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191 | if (passwds == NULL) {
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192 | /* no passwords on the command line */
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193 |
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194 | passwd_malloc_size = pw_maxlen + 2;
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195 | /* longer than necessary so that we can warn about truncation */
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196 | passwd = passwd_malloc =
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197 | app_malloc(passwd_malloc_size, "password buffer");
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198 | }
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199 |
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200 | if ((in == NULL) && (passwds == NULL)) {
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201 | if (1) {
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202 | #ifndef OPENSSL_NO_UI
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203 | /* build a null-terminated list */
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204 | static char *passwds_static[2] = { NULL, NULL };
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205 |
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206 | passwds = passwds_static;
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207 | if (in == NULL)
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208 | if (EVP_read_pw_string
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209 | (passwd_malloc, passwd_malloc_size, "Password: ",
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210 | !(passed_salt || in_noverify)) != 0)
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211 | goto end;
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212 | passwds[0] = passwd_malloc;
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213 | } else {
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214 | #endif
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215 | BIO_printf(bio_err, "password required\n");
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216 | goto end;
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217 | }
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218 | }
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219 |
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220 |
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221 | if (in == NULL) {
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222 | assert(passwds != NULL);
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223 | assert(*passwds != NULL);
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224 |
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225 | do { /* loop over list of passwords */
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226 | passwd = *passwds++;
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227 | if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
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228 | quiet, table, reverse, pw_maxlen, usecrypt, use1,
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229 | useapr1))
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230 | goto end;
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231 | }
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232 | while (*passwds != NULL);
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233 | } else
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234 | /* in != NULL */
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235 | {
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236 | int done;
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237 |
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238 | assert(passwd != NULL);
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239 | do {
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240 | int r = BIO_gets(in, passwd, pw_maxlen + 1);
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241 | if (r > 0) {
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242 | char *c = (strchr(passwd, '\n'));
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243 | if (c != NULL)
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244 | *c = 0; /* truncate at newline */
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245 | else {
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246 | /* ignore rest of line */
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247 | char trash[BUFSIZ];
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248 | do
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249 | r = BIO_gets(in, trash, sizeof trash);
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250 | while ((r > 0) && (!strchr(trash, '\n')));
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251 | }
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252 |
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253 | if (!do_passwd
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254 | (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
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255 | table, reverse, pw_maxlen, usecrypt, use1, useapr1))
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256 | goto end;
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257 | }
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258 | done = (r <= 0);
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259 | }
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260 | while (!done);
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261 | }
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262 | ret = 0;
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263 |
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264 | end:
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265 | ERR_print_errors(bio_err);
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266 | OPENSSL_free(salt_malloc);
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267 | OPENSSL_free(passwd_malloc);
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268 | BIO_free(in);
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269 | return (ret);
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270 | }
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271 |
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272 | # ifndef NO_MD5CRYPT_1
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273 | /*
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274 | * MD5-based password algorithm (should probably be available as a library
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275 | * function; then the static buffer would not be acceptable). For magic
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276 | * string "1", this should be compatible to the MD5-based BSD password
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277 | * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
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278 | * Apache password algorithm. (Apparently, the Apache password algorithm is
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279 | * identical except that the 'magic' string was changed -- the laziest
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280 | * application of the NIH principle I've ever encountered.)
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281 | */
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282 | static char *md5crypt(const char *passwd, const char *magic, const char *salt)
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283 | {
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284 | /* "$apr1$..salt..$.......md5hash..........\0" */
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285 | static char out_buf[6 + 9 + 24 + 2];
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286 | unsigned char buf[MD5_DIGEST_LENGTH];
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287 | char *salt_out;
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288 | int n;
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289 | unsigned int i;
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290 | EVP_MD_CTX *md = NULL, *md2 = NULL;
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291 | size_t passwd_len, salt_len, magic_len;
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292 |
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293 | passwd_len = strlen(passwd);
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294 | out_buf[0] = '$';
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295 | out_buf[1] = 0;
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296 | magic_len = strlen(magic);
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297 |
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298 | if (magic_len > 4) /* assert it's "1" or "apr1" */
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299 | return NULL;
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300 |
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301 | OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
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302 | OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
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303 | OPENSSL_strlcat(out_buf, salt, sizeof out_buf);
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304 |
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305 | if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
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306 | return NULL;
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307 |
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308 | salt_out = out_buf + 2 + magic_len;
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309 | salt_len = strlen(salt_out);
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310 |
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311 | if (salt_len > 8)
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312 | return NULL;
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313 |
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314 | md = EVP_MD_CTX_new();
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315 | if (md == NULL
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316 | || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
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317 | || !EVP_DigestUpdate(md, passwd, passwd_len)
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318 | || !EVP_DigestUpdate(md, "$", 1)
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319 | || !EVP_DigestUpdate(md, magic, magic_len)
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320 | || !EVP_DigestUpdate(md, "$", 1)
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321 | || !EVP_DigestUpdate(md, salt_out, salt_len))
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322 | goto err;
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323 |
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324 | md2 = EVP_MD_CTX_new();
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325 | if (md2 == NULL
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326 | || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
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327 | || !EVP_DigestUpdate(md2, passwd, passwd_len)
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328 | || !EVP_DigestUpdate(md2, salt_out, salt_len)
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329 | || !EVP_DigestUpdate(md2, passwd, passwd_len)
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330 | || !EVP_DigestFinal_ex(md2, buf, NULL))
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331 | goto err;
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332 |
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333 | for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
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334 | if (!EVP_DigestUpdate(md, buf, sizeof buf))
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335 | goto err;
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336 | }
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337 | if (!EVP_DigestUpdate(md, buf, i))
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338 | goto err;
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339 |
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340 | n = passwd_len;
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341 | while (n) {
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342 | if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
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343 | goto err;
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344 | n >>= 1;
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345 | }
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346 | if (!EVP_DigestFinal_ex(md, buf, NULL))
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347 | return NULL;
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348 |
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349 | for (i = 0; i < 1000; i++) {
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350 | if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
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351 | goto err;
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352 | if (!EVP_DigestUpdate(md2,
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353 | (i & 1) ? (unsigned const char *)passwd : buf,
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354 | (i & 1) ? passwd_len : sizeof buf))
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355 | goto err;
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356 | if (i % 3) {
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357 | if (!EVP_DigestUpdate(md2, salt_out, salt_len))
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358 | goto err;
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359 | }
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360 | if (i % 7) {
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361 | if (!EVP_DigestUpdate(md2, passwd, passwd_len))
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362 | goto err;
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363 | }
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364 | if (!EVP_DigestUpdate(md2,
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365 | (i & 1) ? buf : (unsigned const char *)passwd,
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366 | (i & 1) ? sizeof buf : passwd_len))
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367 | goto err;
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368 | if (!EVP_DigestFinal_ex(md2, buf, NULL))
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369 | goto err;
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370 | }
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371 | EVP_MD_CTX_free(md2);
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372 | EVP_MD_CTX_free(md);
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373 | md2 = NULL;
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374 | md = NULL;
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375 |
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376 | {
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377 | /* transform buf into output string */
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378 | unsigned char buf_perm[sizeof buf];
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379 | int dest, source;
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380 | char *output;
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381 |
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382 | /* silly output permutation */
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383 | for (dest = 0, source = 0; dest < 14;
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384 | dest++, source = (source + 6) % 17)
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385 | buf_perm[dest] = buf[source];
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386 | buf_perm[14] = buf[5];
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387 | buf_perm[15] = buf[11];
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388 | # ifndef PEDANTIC /* Unfortunately, this generates a "no
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389 | * effect" warning */
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390 | assert(16 == sizeof buf_perm);
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391 | # endif
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392 |
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393 | output = salt_out + salt_len;
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394 | assert(output == out_buf + strlen(out_buf));
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395 |
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396 | *output++ = '$';
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397 |
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398 | for (i = 0; i < 15; i += 3) {
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399 | *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
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400 | *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
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401 | (buf_perm[i + 2] >> 6)];
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402 | *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
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403 | (buf_perm[i + 1] >> 4)];
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404 | *output++ = cov_2char[buf_perm[i] >> 2];
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405 | }
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406 | assert(i == 15);
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407 | *output++ = cov_2char[buf_perm[i] & 0x3f];
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408 | *output++ = cov_2char[buf_perm[i] >> 6];
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409 | *output = 0;
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410 | assert(strlen(out_buf) < sizeof(out_buf));
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411 | }
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412 |
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413 | return out_buf;
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414 |
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415 | err:
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416 | EVP_MD_CTX_free(md2);
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417 | EVP_MD_CTX_free(md);
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418 | return NULL;
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419 | }
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420 | # endif
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421 |
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422 | static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
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423 | char *passwd, BIO *out, int quiet, int table,
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424 | int reverse, size_t pw_maxlen, int usecrypt, int use1,
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425 | int useapr1)
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426 | {
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427 | char *hash = NULL;
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428 |
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429 | assert(salt_p != NULL);
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430 | assert(salt_malloc_p != NULL);
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431 |
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432 | /* first make sure we have a salt */
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433 | if (!passed_salt) {
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434 | # ifndef OPENSSL_NO_DES
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435 | if (usecrypt) {
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436 | if (*salt_malloc_p == NULL) {
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437 | *salt_p = *salt_malloc_p = app_malloc(3, "salt buffer");
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438 | }
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439 | if (RAND_bytes((unsigned char *)*salt_p, 2) <= 0)
|
---|
440 | goto end;
|
---|
441 | (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
|
---|
442 | (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
|
---|
443 | (*salt_p)[2] = 0;
|
---|
444 | # ifdef CHARSET_EBCDIC
|
---|
445 | ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert back
|
---|
446 | * to ASCII */
|
---|
447 | # endif
|
---|
448 | }
|
---|
449 | # endif /* !OPENSSL_NO_DES */
|
---|
450 |
|
---|
451 | # ifndef NO_MD5CRYPT_1
|
---|
452 | if (use1 || useapr1) {
|
---|
453 | int i;
|
---|
454 |
|
---|
455 | if (*salt_malloc_p == NULL) {
|
---|
456 | *salt_p = *salt_malloc_p = app_malloc(9, "salt buffer");
|
---|
457 | }
|
---|
458 | if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0)
|
---|
459 | goto end;
|
---|
460 |
|
---|
461 | for (i = 0; i < 8; i++)
|
---|
462 | (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
|
---|
463 | (*salt_p)[8] = 0;
|
---|
464 | }
|
---|
465 | # endif /* !NO_MD5CRYPT_1 */
|
---|
466 | }
|
---|
467 |
|
---|
468 | assert(*salt_p != NULL);
|
---|
469 |
|
---|
470 | /* truncate password if necessary */
|
---|
471 | if ((strlen(passwd) > pw_maxlen)) {
|
---|
472 | if (!quiet)
|
---|
473 | /*
|
---|
474 | * XXX: really we should know how to print a size_t, not cast it
|
---|
475 | */
|
---|
476 | BIO_printf(bio_err,
|
---|
477 | "Warning: truncating password to %u characters\n",
|
---|
478 | (unsigned)pw_maxlen);
|
---|
479 | passwd[pw_maxlen] = 0;
|
---|
480 | }
|
---|
481 | assert(strlen(passwd) <= pw_maxlen);
|
---|
482 |
|
---|
483 | /* now compute password hash */
|
---|
484 | # ifndef OPENSSL_NO_DES
|
---|
485 | if (usecrypt)
|
---|
486 | hash = DES_crypt(passwd, *salt_p);
|
---|
487 | # endif
|
---|
488 | # ifndef NO_MD5CRYPT_1
|
---|
489 | if (use1 || useapr1)
|
---|
490 | hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
|
---|
491 | # endif
|
---|
492 | assert(hash != NULL);
|
---|
493 |
|
---|
494 | if (table && !reverse)
|
---|
495 | BIO_printf(out, "%s\t%s\n", passwd, hash);
|
---|
496 | else if (table && reverse)
|
---|
497 | BIO_printf(out, "%s\t%s\n", hash, passwd);
|
---|
498 | else
|
---|
499 | BIO_printf(out, "%s\n", hash);
|
---|
500 | return 1;
|
---|
501 |
|
---|
502 | end:
|
---|
503 | return 0;
|
---|
504 | }
|
---|
505 | #else
|
---|
506 |
|
---|
507 | int passwd_main(int argc, char **argv)
|
---|
508 | {
|
---|
509 | BIO_printf(bio_err, "Program not available.\n");
|
---|
510 | return (1);
|
---|
511 | }
|
---|
512 | #endif
|
---|