annotate dropbearconvert.c @ 1909:43ebe0028187

Add tests for dropbearconvert
author Matt Johnston <matt@ucc.asn.au>
date Tue, 29 Mar 2022 22:29:17 +0800
parents be236878efcf
children
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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 #include "crypto_desc.h"
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32 #include "dbrandom.h"
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35 static int do_convert(int intype, const char* infile, int outtype,
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36 const char* outfile);
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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 static void printhelp(char * progname) {
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41
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42 fprintf(stderr, "Usage: %s <inputtype> <outputtype> <inputfile> <outputfile>\n\n"
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43 "CAUTION: This program is for convenience only, and is not secure if used on\n"
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44 "untrusted input files, ie it could allow arbitrary code execution.\n"
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45 "All parameters must be specified in order.\n"
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46 "\n"
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47 "The input and output types are one of:\n"
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48 "openssh\n"
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49 "dropbear\n"
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50 "\n"
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51 "Example:\n"
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52 "dropbearconvert openssh dropbear /etc/ssh/ssh_host_rsa_key /etc/dropbear_rsa_host_key\n",
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53 progname);
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54 }
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55
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56 #if defined(DBMULTI_dropbearconvert) || !DROPBEAR_MULTI
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57 #if defined(DBMULTI_dropbearconvert) && DROPBEAR_MULTI
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58 int dropbearconvert_main(int argc, char ** argv) {
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59 #else
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60 int main(int argc, char ** argv) {
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61 #endif
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62
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63 int intype, outtype;
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64 const char* infile;
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65 const char* outfile;
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66
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67 crypto_init();
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68 seedrandom();
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69
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70 #if DEBUG_TRACE
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71 /* It's hard for it to get in the way _too_ much */
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72 debug_trace = DROPBEAR_VERBOSE_LEVEL;
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73 #endif
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74
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75 /* get the commandline options */
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76 if (argc != 5) {
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77 fprintf(stderr, "All arguments must be specified\n");
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78 goto usage;
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79 }
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80
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81 /* input type */
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82 if (argv[1][0] == 'd') {
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83 intype = KEYFILE_DROPBEAR;
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84 } else if (argv[1][0] == 'o') {
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85 intype = KEYFILE_OPENSSH;
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86 } else {
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87 fprintf(stderr, "Invalid input key type\n");
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88 goto usage;
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89 }
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90
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91 /* output type */
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92 if (argv[2][0] == 'd') {
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93 outtype = KEYFILE_DROPBEAR;
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94 } else if (argv[2][0] == 'o') {
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95 outtype = KEYFILE_OPENSSH;
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96 } else {
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97 fprintf(stderr, "Invalid output key type\n");
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98 goto usage;
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99 }
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100
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101 /* we don't want output readable by others */
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102 umask(077);
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103
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104 infile = argv[3];
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105 outfile = argv[4];
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106
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107 return do_convert(intype, infile, outtype, outfile);
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108
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109 usage:
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110 printhelp(argv[0]);
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111 return 1;
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112 }
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113 #endif
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114
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115 static int do_convert(int intype, const char* infile, int outtype,
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116 const char* outfile) {
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117
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118 sign_key * key = NULL;
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119 const char * keytype = NULL;
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120 int ret = 1;
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121
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122 key = import_read(infile, NULL, intype);
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123 if (!key) {
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124 fprintf(stderr, "Error reading key from '%s'\n",
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125 infile);
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126 goto out;
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127 }
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128
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129 keytype = signkey_name_from_type(key->type, NULL);
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130
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131 fprintf(stderr, "Key is a %s key\n", keytype);
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132
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133 if (import_write(outfile, key, NULL, outtype) != 1) {
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134 fprintf(stderr, "Error writing key to '%s'\n", outfile);
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135 } else {
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136 fprintf(stderr, "Wrote key to '%s'\n", outfile);
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137 ret = 0;
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138 }
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139
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140 out:
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141 if (key) {
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142 sign_key_free(key);
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143 }
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144 return ret;
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145 }