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annotate dropbearconvert.c @ 30:223b0f5f8dce

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Switching to the magical new Makefile, and new dbmulti style
author Matt Johnston <matt@ucc.asn.au>
date Tue, 27 Jul 2004 14:44:43 +0000
parents fe6bca95afa7
children 0bf5cebe622c
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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"
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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 "\n"
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52 "The inputfile and output file can be '-' to specify\n"
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53 "standard input or standard output.\n", progname);
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54 }
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55
30
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56 #if defined(DBMULTI_dropbearconvert) || !defined(DROPBEAR_MULTI)
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57 #if defined(DBMULTI_dropbearconvert) && defined(DROPBEAR_MULTI)
4
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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 /* get the commandline options */
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68 if (argc != 5) {
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69 fprintf(stderr, "All arguments must be specified\n");
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70 goto usage;
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71 }
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72
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73 /* input type */
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74 if (argv[1][0] == 'd') {
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75 intype = KEYFILE_DROPBEAR;
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76 } else if (argv[1][0] == 'o') {
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77 intype = KEYFILE_OPENSSH;
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78 } else {
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79 fprintf(stderr, "Invalid input key type\n");
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80 goto usage;
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81 }
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82
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83 /* output type */
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84 if (argv[2][0] == 'd') {
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85 outtype = KEYFILE_DROPBEAR;
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86 } else if (argv[2][0] == 'o') {
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87 outtype = KEYFILE_OPENSSH;
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88 } else {
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89 fprintf(stderr, "Invalid output key type\n");
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90 goto usage;
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91 }
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92
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93 /* we don't want output readable by others */
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94 umask(077);
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95
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96 infile = argv[3];
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97 outfile = argv[4];
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98
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99 return do_convert(intype, infile, outtype, outfile);
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100
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101 usage:
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102 printhelp(argv[0]);
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103 return 1;
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104 }
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105 #endif
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106
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107 static int do_convert(int intype, const char* infile, int outtype,
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108 const char* outfile) {
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109
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110 sign_key * key = NULL;
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111 char * keytype = NULL;
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112 int ret = 1;
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113
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114 key = import_read(infile, NULL, intype);
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115 if (!key) {
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116 fprintf(stderr, "Error reading key from '%s'\n",
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117 infile);
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118 goto out;
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119 }
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120
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121 #ifdef DROPBEAR_RSA
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122 if (key->rsakey != NULL) {
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123 keytype = "RSA";
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124 }
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125 #endif
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126 #ifdef DROPBEAR_DSS
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127 if (key->dsskey != NULL) {
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128 keytype = "DSS";
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129 }
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130 #endif
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131
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132 fprintf(stderr, "Key is a %s key\n", keytype);
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133
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134 if (import_write(outfile, key, NULL, outtype) != 1) {
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135 fprintf(stderr, "Error writing key to '%s'\n", outfile);
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136 } else {
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137 fprintf(stderr, "Wrote key to '%s'\n", outfile);
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138 ret = 0;
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139 }
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140
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141 out:
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142 if (key) {
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143 sign_key_free(key);
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144 }
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145 return ret;
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146 }