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 2015 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 getPassword = require('getpass').getPass;
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11 |
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12 | var options = [
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13 | {
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14 | names: ['hash', 'H'],
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15 | type: 'string',
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16 | help: 'Hash algorithm (sha1, sha256, sha384, sha512)'
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17 | },
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18 | {
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19 | names: ['verbose', 'v'],
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20 | type: 'bool',
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21 | help: 'Display verbose info about key and hash used'
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22 | },
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23 | {
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24 | names: ['identity', 'i'],
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25 | type: 'string',
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26 | help: 'Path to key to use'
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27 | },
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28 | {
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29 | names: ['file', 'f'],
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30 | type: 'string',
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31 | help: 'Input filename'
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32 | },
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33 | {
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34 | names: ['out', 'o'],
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35 | type: 'string',
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36 | help: 'Output filename'
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37 | },
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38 | {
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39 | names: ['format', 't'],
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40 | type: 'string',
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41 | help: 'Signature format (asn1, ssh, raw)'
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42 | },
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43 | {
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44 | names: ['binary', 'b'],
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45 | type: 'bool',
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46 | help: 'Output raw binary instead of base64'
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47 | },
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48 | {
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49 | names: ['help', 'h'],
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50 | type: 'bool',
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51 | help: 'Shows this help text'
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52 | }
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53 | ];
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54 |
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55 | var parseOpts = {};
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56 |
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57 | if (require.main === module) {
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58 | var parser = dashdash.createParser({
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59 | options: options
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60 | });
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61 |
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62 | try {
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63 | var opts = parser.parse(process.argv);
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64 | } catch (e) {
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65 | console.error('sshpk-sign: error: %s', e.message);
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66 | process.exit(1);
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67 | }
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68 |
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69 | if (opts.help || opts._args.length > 1) {
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70 | var help = parser.help({}).trimRight();
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71 | console.error('sshpk-sign: sign data using an SSH key\n');
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72 | console.error(help);
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73 | process.exit(1);
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74 | }
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75 |
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76 | if (!opts.identity) {
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77 | var help = parser.help({}).trimRight();
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78 | console.error('sshpk-sign: the -i or --identity option ' +
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79 | 'is required\n');
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80 | console.error(help);
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81 | process.exit(1);
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82 | }
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83 |
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84 | var keyData = fs.readFileSync(opts.identity);
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85 | parseOpts.filename = opts.identity;
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86 |
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87 | run();
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88 | }
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89 |
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90 | function run() {
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91 | var key;
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92 | try {
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93 | key = sshpk.parsePrivateKey(keyData, 'auto', parseOpts);
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94 | } catch (e) {
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95 | if (e.name === 'KeyEncryptedError') {
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96 | getPassword(function (err, pw) {
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97 | parseOpts.passphrase = pw;
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98 | run();
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99 | });
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100 | return;
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101 | }
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102 | console.error('sshpk-sign: error loading private key "' +
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103 | opts.identity + '": ' + e.name + ': ' + e.message);
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104 | process.exit(1);
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105 | }
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106 |
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107 | var hash = opts.hash || key.defaultHashAlgorithm();
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108 |
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109 | var signer;
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110 | try {
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111 | signer = key.createSign(hash);
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112 | } catch (e) {
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113 | console.error('sshpk-sign: error creating signer: ' +
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114 | e.name + ': ' + e.message);
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115 | process.exit(1);
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116 | }
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117 |
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118 | if (opts.verbose) {
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119 | console.error('sshpk-sign: using %s-%s with a %d bit key',
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120 | key.type, hash, key.size);
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121 | }
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122 |
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123 | var inFile = process.stdin;
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124 | var inFileName = 'stdin';
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125 |
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126 | var inFilePath;
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127 | if (opts.file) {
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128 | inFilePath = opts.file;
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129 | } else if (opts._args.length === 1) {
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130 | inFilePath = opts._args[0];
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131 | }
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132 |
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133 | if (inFilePath)
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134 | inFileName = path.basename(inFilePath);
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135 |
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136 | try {
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137 | if (inFilePath) {
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138 | fs.accessSync(inFilePath, fs.R_OK);
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139 | inFile = fs.createReadStream(inFilePath);
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140 | }
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141 | } catch (e) {
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142 | console.error('sshpk-sign: error opening input file' +
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143 | ': ' + e.name + ': ' + e.message);
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144 | process.exit(1);
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145 | }
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146 |
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147 | var outFile = process.stdout;
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148 |
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149 | try {
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150 | if (opts.out && !opts.identify) {
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151 | fs.accessSync(path.dirname(opts.out), fs.W_OK);
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152 | outFile = fs.createWriteStream(opts.out);
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153 | }
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154 | } catch (e) {
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155 | console.error('sshpk-sign: error opening output file' +
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156 | ': ' + e.name + ': ' + e.message);
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157 | process.exit(1);
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158 | }
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159 |
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160 | inFile.pipe(signer);
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161 | inFile.on('end', function () {
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162 | var sig;
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163 | try {
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164 | sig = signer.sign();
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165 | } catch (e) {
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166 | console.error('sshpk-sign: error signing data: ' +
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167 | e.name + ': ' + e.message);
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168 | process.exit(1);
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169 | }
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170 |
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171 | var fmt = opts.format || 'asn1';
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172 | var output;
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173 | try {
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174 | output = sig.toBuffer(fmt);
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175 | if (!opts.binary)
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176 | output = output.toString('base64');
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177 | } catch (e) {
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178 | console.error('sshpk-sign: error converting signature' +
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179 | ' to ' + fmt + ' format: ' + e.name + ': ' +
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180 | e.message);
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181 | process.exit(1);
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182 | }
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183 |
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184 | outFile.write(output);
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185 | if (!opts.binary)
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186 | outFile.write('\n');
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187 | outFile.once('drain', function () {
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188 | process.exit(0);
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189 | });
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190 | });
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191 | }
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