1 | #!/usr/bin/env node
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2 | // -*- mode: js -*-
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3 | // vim: set filetype=javascript :
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4 | // Copyright 2018 Joyent, Inc. All rights reserved.
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5 |
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6 | var dashdash = require('dashdash');
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7 | var sshpk = require('../lib/index');
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8 | var fs = require('fs');
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9 | var path = require('path');
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10 | var tty = require('tty');
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11 | var readline = require('readline');
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12 | var getPassword = require('getpass').getPass;
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13 |
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14 | var options = [
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15 | {
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16 | names: ['outformat', 't'],
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17 | type: 'string',
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18 | help: 'Output format'
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19 | },
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20 | {
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21 | names: ['informat', 'T'],
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22 | type: 'string',
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23 | help: 'Input format'
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24 | },
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25 | {
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26 | names: ['file', 'f'],
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27 | type: 'string',
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28 | help: 'Input file name (default stdin)'
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29 | },
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30 | {
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31 | names: ['out', 'o'],
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32 | type: 'string',
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33 | help: 'Output file name (default stdout)'
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34 | },
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35 | {
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36 | names: ['private', 'p'],
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37 | type: 'bool',
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38 | help: 'Produce a private key as output'
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39 | },
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40 | {
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41 | names: ['derive', 'd'],
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42 | type: 'string',
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43 | help: 'Output a new key derived from this one, with given algo'
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44 | },
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45 | {
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46 | names: ['identify', 'i'],
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47 | type: 'bool',
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48 | help: 'Print key metadata instead of converting'
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49 | },
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50 | {
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51 | names: ['fingerprint', 'F'],
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52 | type: 'bool',
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53 | help: 'Output key fingerprint'
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54 | },
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55 | {
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56 | names: ['hash', 'H'],
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57 | type: 'string',
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58 | help: 'Hash function to use for key fingeprint with -F'
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59 | },
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60 | {
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61 | names: ['spki', 's'],
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62 | type: 'bool',
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63 | help: 'With -F, generates an SPKI fingerprint instead of SSH'
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64 | },
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65 | {
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66 | names: ['comment', 'c'],
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67 | type: 'string',
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68 | help: 'Set key comment, if output format supports'
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69 | },
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70 | {
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71 | names: ['help', 'h'],
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72 | type: 'bool',
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73 | help: 'Shows this help text'
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74 | }
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75 | ];
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76 |
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77 | if (require.main === module) {
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78 | var parser = dashdash.createParser({
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79 | options: options
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80 | });
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81 |
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82 | try {
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83 | var opts = parser.parse(process.argv);
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84 | } catch (e) {
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85 | console.error('sshpk-conv: error: %s', e.message);
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86 | process.exit(1);
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87 | }
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88 |
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89 | if (opts.help || opts._args.length > 1) {
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90 | var help = parser.help({}).trimRight();
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91 | console.error('sshpk-conv: converts between SSH key formats\n');
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92 | console.error(help);
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93 | console.error('\navailable key formats:');
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94 | console.error(' - pem, pkcs1 eg id_rsa');
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95 | console.error(' - ssh eg id_rsa.pub');
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96 | console.error(' - pkcs8 format you want for openssl');
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97 | console.error(' - openssh like output of ssh-keygen -o');
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98 | console.error(' - rfc4253 raw OpenSSH wire format');
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99 | console.error(' - dnssec dnssec-keygen format');
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100 | console.error(' - putty PuTTY ppk format');
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101 | console.error('\navailable fingerprint formats:');
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102 | console.error(' - hex colon-separated hex for SSH');
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103 | console.error(' straight hex for SPKI');
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104 | console.error(' - base64 SHA256:* format from OpenSSH');
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105 | process.exit(1);
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106 | }
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107 |
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108 | /*
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109 | * Key derivation can only be done on private keys, so use of the -d
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110 | * option necessarily implies -p.
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111 | */
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112 | if (opts.derive)
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113 | opts.private = true;
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114 |
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115 | var inFile = process.stdin;
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116 | var inFileName = 'stdin';
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117 |
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118 | var inFilePath;
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119 | if (opts.file) {
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120 | inFilePath = opts.file;
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121 | } else if (opts._args.length === 1) {
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122 | inFilePath = opts._args[0];
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123 | }
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124 |
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125 | if (inFilePath)
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126 | inFileName = path.basename(inFilePath);
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127 |
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128 | try {
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129 | if (inFilePath) {
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130 | fs.accessSync(inFilePath, fs.R_OK);
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131 | inFile = fs.createReadStream(inFilePath);
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132 | }
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133 | } catch (e) {
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134 | ifError(e, 'error opening input file');
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135 | }
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136 |
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137 | var outFile = process.stdout;
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138 |
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139 | try {
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140 | if (opts.out && !opts.identify) {
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141 | fs.accessSync(path.dirname(opts.out), fs.W_OK);
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142 | outFile = fs.createWriteStream(opts.out);
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143 | }
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144 | } catch (e) {
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145 | ifError(e, 'error opening output file');
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146 | }
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147 |
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148 | var bufs = [];
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149 | inFile.on('readable', function () {
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150 | var data;
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151 | while ((data = inFile.read()))
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152 | bufs.push(data);
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153 | });
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154 | var parseOpts = {};
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155 | parseOpts.filename = inFileName;
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156 | inFile.on('end', function processKey() {
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157 | var buf = Buffer.concat(bufs);
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158 | var fmt = 'auto';
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159 | if (opts.informat)
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160 | fmt = opts.informat;
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161 | var f = sshpk.parseKey;
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162 | if (opts.private)
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163 | f = sshpk.parsePrivateKey;
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164 | try {
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165 | var key = f(buf, fmt, parseOpts);
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166 | } catch (e) {
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167 | if (e.name === 'KeyEncryptedError') {
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168 | getPassword(function (err, pw) {
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169 | if (err)
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170 | ifError(err);
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171 | parseOpts.passphrase = pw;
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172 | processKey();
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173 | });
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174 | return;
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175 | }
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176 | ifError(e);
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177 | }
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178 |
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179 | if (opts.derive)
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180 | key = key.derive(opts.derive);
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181 |
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182 | if (opts.comment)
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183 | key.comment = opts.comment;
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184 |
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185 | if (opts.identify) {
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186 | var kind = 'public';
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187 | if (sshpk.PrivateKey.isPrivateKey(key))
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188 | kind = 'private';
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189 | console.log('%s: a %d bit %s %s key', inFileName,
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190 | key.size, key.type.toUpperCase(), kind);
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191 | if (key.type === 'ecdsa')
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192 | console.log('ECDSA curve: %s', key.curve);
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193 | if (key.comment)
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194 | console.log('Comment: %s', key.comment);
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195 | console.log('SHA256 fingerprint: ' +
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196 | key.fingerprint('sha256').toString());
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197 | console.log('MD5 fingerprint: ' +
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198 | key.fingerprint('md5').toString());
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199 | console.log('SPKI-SHA256 fingerprint: ' +
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200 | key.fingerprint('sha256', 'spki').toString());
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201 | process.exit(0);
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202 | return;
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203 | }
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204 |
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205 | if (opts.fingerprint) {
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206 | var hash = opts.hash;
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207 | var type = opts.spki ? 'spki' : 'ssh';
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208 | var format = opts.outformat;
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209 | var fp = key.fingerprint(hash, type).toString(format);
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210 | outFile.write(fp);
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211 | outFile.write('\n');
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212 | outFile.once('drain', function () {
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213 | process.exit(0);
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214 | });
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215 | return;
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216 | }
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217 |
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218 | fmt = undefined;
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219 | if (opts.outformat)
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220 | fmt = opts.outformat;
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221 | outFile.write(key.toBuffer(fmt));
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222 | if (fmt === 'ssh' ||
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223 | (!opts.private && fmt === undefined))
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224 | outFile.write('\n');
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225 | outFile.once('drain', function () {
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226 | process.exit(0);
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227 | });
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228 | });
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229 | }
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230 |
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231 | function ifError(e, txt) {
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232 | if (txt)
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233 | txt = txt + ': ';
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234 | else
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235 | txt = '';
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236 | console.error('sshpk-conv: ' + txt + e.name + ': ' + e.message);
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237 | if (process.env['DEBUG'] || process.env['V']) {
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238 | console.error(e.stack);
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239 | if (e.innerErr)
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240 | console.error(e.innerErr.stack);
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241 | }
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242 | process.exit(1);
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243 | }
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