Mercurial > dropbear

annotate dropbearconvert.c @ 476:df7f7da7f6e4 pubkey-options

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- Rework pubkey options to be more careful about buffer lengths. Needs review.
author Matt Johnston <matt@ucc.asn.au>
date Fri, 12 Sep 2008 17:23:56 +0000
parents c85c88500ea6
children 740e782679be 71e7d31f7671
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* This program converts to/from Dropbear and OpenSSH private-key formats */
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26 #include "includes.h"
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27 #include "signkey.h"
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28 #include "buffer.h"
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29 #include "dbutil.h"
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30 #include "keyimport.h"
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31
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32
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33 static int do_convert(int intype, const char* infile, int outtype,
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34 const char* outfile);
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35
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36 static void printhelp(char * progname);
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37
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38 static void printhelp(char * progname) {
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39
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40 fprintf(stderr, "Usage: %s <inputtype> <outputtype> <inputfile> <outputfile>\n\n"
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41 "CAUTION: This program is for convenience only, and is not secure if used on\n"
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42 "untrusted input files, ie it could allow arbitrary code execution.\n"
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43 "All parameters must be specified in order.\n"
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44 "\n"
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45 "The input and output types are one of:\n"
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46 "openssh\n"
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47 "dropbear\n"
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48 "\n"
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49 "Example:\n"
87
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50 "dropbearconvert openssh dropbear /etc/ssh/ssh_host_rsa_key /etc/dropbear_rsa_host_key\n",
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51 progname);
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52 }
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53
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223b0f5f8dce Switching to the magical new Makefile, and new dbmulti style
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54 #if defined(DBMULTI_dropbearconvert) || !defined(DROPBEAR_MULTI)
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55 #if defined(DBMULTI_dropbearconvert) && defined(DROPBEAR_MULTI)
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56 int dropbearconvert_main(int argc, char ** argv) {
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57 #else
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58 int main(int argc, char ** argv) {
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59 #endif
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60
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61 int intype, outtype;
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62 const char* infile;
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63 const char* outfile;
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64
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65 #ifdef DEBUG_TRACE
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66 /* It's hard for it to get in the way _too_ much */
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67 debug_trace = 1;
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68 #endif
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69
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70 /* get the commandline options */
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71 if (argc != 5) {
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72 fprintf(stderr, "All arguments must be specified\n");
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73 goto usage;
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74 }
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75
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76 /* input type */
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77 if (argv[1][0] == 'd') {
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78 intype = KEYFILE_DROPBEAR;
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79 } else if (argv[1][0] == 'o') {
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80 intype = KEYFILE_OPENSSH;
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81 } else {
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82 fprintf(stderr, "Invalid input key type\n");
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83 goto usage;
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84 }
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85
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86 /* output type */
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87 if (argv[2][0] == 'd') {
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88 outtype = KEYFILE_DROPBEAR;
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89 } else if (argv[2][0] == 'o') {
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90 outtype = KEYFILE_OPENSSH;
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91 } else {
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92 fprintf(stderr, "Invalid output key type\n");
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93 goto usage;
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94 }
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95
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96 /* we don't want output readable by others */
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97 umask(077);
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98
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99 infile = argv[3];
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100 outfile = argv[4];
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101
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102 return do_convert(intype, infile, outtype, outfile);
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103
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104 usage:
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105 printhelp(argv[0]);
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106 return 1;
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107 }
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108 #endif
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109
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110 static int do_convert(int intype, const char* infile, int outtype,
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111 const char* outfile) {
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112
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113 sign_key * key = NULL;
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114 char * keytype = NULL;
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115 int ret = 1;
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116
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117 key = import_read(infile, NULL, intype);
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118 if (!key) {
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119 fprintf(stderr, "Error reading key from '%s'\n",
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120 infile);
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121 goto out;
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122 }
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123
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124 #ifdef DROPBEAR_RSA
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125 if (key->rsakey != NULL) {
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126 keytype = "RSA";
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127 }
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128 #endif
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129 #ifdef DROPBEAR_DSS
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130 if (key->dsskey != NULL) {
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131 keytype = "DSS";
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132 }
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133 #endif
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134
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135 fprintf(stderr, "Key is a %s key\n", keytype);
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136
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137 if (import_write(outfile, key, NULL, outtype) != 1) {
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138 fprintf(stderr, "Error writing key to '%s'\n", outfile);
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139 } else {
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140 fprintf(stderr, "Wrote key to '%s'\n", outfile);
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141 ret = 0;
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142 }
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143
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144 out:
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145 if (key) {
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146 sign_key_free(key);
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147 }
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148 return ret;
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149 }