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#!/usr/bin/env node
// -*- mode: js -*-
// vim: set filetype=javascript :
// Copyright 2018 Joyent, Inc. All rights reserved.
var dashdash = require('dashdash');
var sshpk = require('../lib/index');
var fs = require('fs');
var path = require('path');
var tty = require('tty');
var readline = require('readline');
var getPassword = require('getpass').getPass;
var options = [
{
names: ['outformat', 't'],
type: 'string',
help: 'Output format'
},
{
names: ['informat', 'T'],
type: 'string',
help: 'Input format'
},
{
names: ['file', 'f'],
type: 'string',
help: 'Input file name (default stdin)'
},
{
names: ['out', 'o'],
type: 'string',
help: 'Output file name (default stdout)'
},
{
names: ['private', 'p'],
type: 'bool',
help: 'Produce a private key as output'
},
{
names: ['derive', 'd'],
type: 'string',
help: 'Output a new key derived from this one, with given algo'
},
{
names: ['identify', 'i'],
type: 'bool',
help: 'Print key metadata instead of converting'
},
{
names: ['fingerprint', 'F'],
type: 'bool',
help: 'Output key fingerprint'
},
{
names: ['hash', 'H'],
type: 'string',
help: 'Hash function to use for key fingeprint with -F'
},
{
names: ['spki', 's'],
type: 'bool',
help: 'With -F, generates an SPKI fingerprint instead of SSH'
},
{
names: ['comment', 'c'],
type: 'string',
help: 'Set key comment, if output format supports'
},
{
names: ['help', 'h'],
type: 'bool',
help: 'Shows this help text'
}
];
if (require.main === module) {
var parser = dashdash.createParser({
options: options
});
try {
var opts = parser.parse(process.argv);
} catch (e) {
console.error('sshpk-conv: error: %s', e.message);
process.exit(1);
}
if (opts.help || opts._args.length > 1) {
var help = parser.help({}).trimRight();
console.error('sshpk-conv: converts between SSH key formats\n');
console.error(help);
console.error('\navailable key formats:');
console.error(' - pem, pkcs1 eg id_rsa');
console.error(' - ssh eg id_rsa.pub');
console.error(' - pkcs8 format you want for openssl');
console.error(' - openssh like output of ssh-keygen -o');
console.error(' - rfc4253 raw OpenSSH wire format');
console.error(' - dnssec dnssec-keygen format');
console.error(' - putty PuTTY ppk format');
console.error('\navailable fingerprint formats:');
console.error(' - hex colon-separated hex for SSH');
console.error(' straight hex for SPKI');
console.error(' - base64 SHA256:* format from OpenSSH');
process.exit(1);
}
/*
* Key derivation can only be done on private keys, so use of the -d
* option necessarily implies -p.
*/
if (opts.derive)
opts.private = true;
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) {
ifError(e, 'error opening input file');
}
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) {
ifError(e, 'error opening output file');
}
var bufs = [];
inFile.on('readable', function () {
var data;
while ((data = inFile.read()))
bufs.push(data);
});
var parseOpts = {};
parseOpts.filename = inFileName;
inFile.on('end', function processKey() {
var buf = Buffer.concat(bufs);
var fmt = 'auto';
if (opts.informat)
fmt = opts.informat;
var f = sshpk.parseKey;
if (opts.private)
f = sshpk.parsePrivateKey;
try {
var key = f(buf, fmt, parseOpts);
} catch (e) {
if (e.name === 'KeyEncryptedError') {
getPassword(function (err, pw) {
if (err)
ifError(err);
parseOpts.passphrase = pw;
processKey();
});
return;
}
ifError(e);
}
if (opts.derive)
key = key.derive(opts.derive);
if (opts.comment)
key.comment = opts.comment;
if (opts.identify) {
var kind = 'public';
if (sshpk.PrivateKey.isPrivateKey(key))
kind = 'private';
console.log('%s: a %d bit %s %s key', inFileName,
key.size, key.type.toUpperCase(), kind);
if (key.type === 'ecdsa')
console.log('ECDSA curve: %s', key.curve);
if (key.comment)
console.log('Comment: %s', key.comment);
console.log('SHA256 fingerprint: ' +
key.fingerprint('sha256').toString());
console.log('MD5 fingerprint: ' +
key.fingerprint('md5').toString());
console.log('SPKI-SHA256 fingerprint: ' +
key.fingerprint('sha256', 'spki').toString());
process.exit(0);
return;
}
if (opts.fingerprint) {
var hash = opts.hash;
var type = opts.spki ? 'spki' : 'ssh';
var format = opts.outformat;
var fp = key.fingerprint(hash, type).toString(format);
outFile.write(fp);
outFile.write('\n');
outFile.once('drain', function () {
process.exit(0);
});
return;
}
fmt = undefined;
if (opts.outformat)
fmt = opts.outformat;
outFile.write(key.toBuffer(fmt));
if (fmt === 'ssh' ||
(!opts.private && fmt === undefined))
outFile.write('\n');
outFile.once('drain', function () {
process.exit(0);
});
});
}
function ifError(e, txt) {
if (txt)
txt = txt + ': ';
else
txt = '';
console.error('sshpk-conv: ' + txt + e.name + ': ' + e.message);
if (process.env['DEBUG'] || process.env['V']) {
console.error(e.stack);
if (e.innerErr)
console.error(e.innerErr.stack);
}
process.exit(1);
}
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