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#!/usr/bin/env node
// -*- mode: js -*-
// vim: set filetype=javascript :
// Copyright 2015 Joyent, Inc. All rights reserved.
var dashdash = require('dashdash');
var sshpk = require('../lib/index');
var fs = require('fs');
var path = require('path');
var getPassword = require('getpass').getPass;
var options = [
{
names: ['hash', 'H'],
type: 'string',
help: 'Hash algorithm (sha1, sha256, sha384, sha512)'
},
{
names: ['verbose', 'v'],
type: 'bool',
help: 'Display verbose info about key and hash used'
},
{
names: ['identity', 'i'],
type: 'string',
help: 'Path to key to use'
},
{
names: ['file', 'f'],
type: 'string',
help: 'Input filename'
},
{
names: ['out', 'o'],
type: 'string',
help: 'Output filename'
},
{
names: ['format', 't'],
type: 'string',
help: 'Signature format (asn1, ssh, raw)'
},
{
names: ['binary', 'b'],
type: 'bool',
help: 'Output raw binary instead of base64'
},
{
names: ['help', 'h'],
type: 'bool',
help: 'Shows this help text'
}
];
var parseOpts = {};
if (require.main === module) {
var parser = dashdash.createParser({
options: options
});
try {
var opts = parser.parse(process.argv);
} catch (e) {
console.error('sshpk-sign: error: %s', e.message);
process.exit(1);
}
if (opts.help || opts._args.length > 1) {
var help = parser.help({}).trimRight();
console.error('sshpk-sign: sign data using an SSH key\n');
console.error(help);
process.exit(1);
}
if (!opts.identity) {
var help = parser.help({}).trimRight();
console.error('sshpk-sign: the -i or --identity option ' +
'is required\n');
console.error(help);
process.exit(1);
}
var keyData = fs.readFileSync(opts.identity);
parseOpts.filename = opts.identity;
run();
}
function run() {
var key;
try {
key = sshpk.parsePrivateKey(keyData, 'auto', parseOpts);
} catch (e) {
if (e.name === 'KeyEncryptedError') {
getPassword(function (err, pw) {
parseOpts.passphrase = pw;
run();
});
return;
}
console.error('sshpk-sign: error loading private key "' +
opts.identity + '": ' + e.name + ': ' + e.message);
process.exit(1);
}
var hash = opts.hash || key.defaultHashAlgorithm();
var signer;
try {
signer = key.createSign(hash);
} catch (e) {
console.error('sshpk-sign: error creating signer: ' +
e.name + ': ' + e.message);
process.exit(1);
}
if (opts.verbose) {
console.error('sshpk-sign: using %s-%s with a %d bit key',
key.type, hash, key.size);
}
var inFile = process.stdin;
var inFileName = 'stdin';
var inFilePath;
if (opts.file) {
inFilePath = opts.file;
} else if (opts._args.length === 1) {
inFilePath = opts._args[0];
}
if (inFilePath)
inFileName = path.basename(inFilePath);
try {
if (inFilePath) {
fs.accessSync(inFilePath, fs.R_OK);
inFile = fs.createReadStream(inFilePath);
}
} catch (e) {
console.error('sshpk-sign: error opening input file' +
': ' + e.name + ': ' + e.message);
process.exit(1);
}
var outFile = process.stdout;
try {
if (opts.out && !opts.identify) {
fs.accessSync(path.dirname(opts.out), fs.W_OK);
outFile = fs.createWriteStream(opts.out);
}
} catch (e) {
console.error('sshpk-sign: error opening output file' +
': ' + e.name + ': ' + e.message);
process.exit(1);
}
inFile.pipe(signer);
inFile.on('end', function () {
var sig;
try {
sig = signer.sign();
} catch (e) {
console.error('sshpk-sign: error signing data: ' +
e.name + ': ' + e.message);
process.exit(1);
}
var fmt = opts.format || 'asn1';
var output;
try {
output = sig.toBuffer(fmt);
if (!opts.binary)
output = output.toString('base64');
} catch (e) {
console.error('sshpk-sign: error converting signature' +
' to ' + fmt + ' format: ' + e.name + ': ' +
e.message);
process.exit(1);
}
outFile.write(output);
if (!opts.binary)
outFile.write('\n');
outFile.once('drain', function () {
process.exit(0);
});
});
}
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