113 lines
2.8 KiB
JavaScript
113 lines
2.8 KiB
JavaScript
|
// Copyright 2012 Joyent, Inc. All rights reserved.
|
||
|
|
|
||
|
|
var assert = require('assert-plus');
|
||
|
|
var sshpk = require('sshpk');
|
||
|
|
var util = require('util');
|
||
|
|
|
||
|
|
var HASH_ALGOS = {
|
||
|
|
'sha1': true,
|
||
|
|
'sha256': true,
|
||
|
|
'sha512': true
|
||
|
|
};
|
||
|
|
|
||
|
|
var PK_ALGOS = {
|
||
|
|
'rsa': true,
|
||
|
|
'dsa': true,
|
||
|
|
'ecdsa': true
|
||
|
|
};
|
||
|
|
|
||
|
|
function HttpSignatureError(message, caller) {
|
||
|
|
if (Error.captureStackTrace)
|
||
|
|
Error.captureStackTrace(this, caller || HttpSignatureError);
|
||
|
|
|
||
|
|
this.message = message;
|
||
|
|
this.name = caller.name;
|
||
|
|
}
|
||
|
|
util.inherits(HttpSignatureError, Error);
|
||
|
|
|
||
|
|
function InvalidAlgorithmError(message) {
|
||
|
|
HttpSignatureError.call(this, message, InvalidAlgorithmError);
|
||
|
|
}
|
||
|
|
util.inherits(InvalidAlgorithmError, HttpSignatureError);
|
||
|
|
|
||
|
|
function validateAlgorithm(algorithm) {
|
||
|
|
var alg = algorithm.toLowerCase().split('-');
|
||
|
|
|
||
|
|
if (alg.length !== 2) {
|
||
|
|
throw (new InvalidAlgorithmError(alg[0].toUpperCase() + ' is not a ' +
|
||
|
|
'valid algorithm'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (alg[0] !== 'hmac' && !PK_ALGOS[alg[0]]) {
|
||
|
|
throw (new InvalidAlgorithmError(alg[0].toUpperCase() + ' type keys ' +
|
||
|
|
'are not supported'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!HASH_ALGOS[alg[1]]) {
|
||
|
|
throw (new InvalidAlgorithmError(alg[1].toUpperCase() + ' is not a ' +
|
||
|
|
'supported hash algorithm'));
|
||
|
|
}
|
||
|
|
|
||
|
|
return (alg);
|
||
|
|
}
|
||
|
|
|
||
|
|
///--- API
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
|
||
|
|
HASH_ALGOS: HASH_ALGOS,
|
||
|
|
PK_ALGOS: PK_ALGOS,
|
||
|
|
|
||
|
|
HttpSignatureError: HttpSignatureError,
|
||
|
|
InvalidAlgorithmError: InvalidAlgorithmError,
|
||
|
|
|
||
|
|
validateAlgorithm: validateAlgorithm,
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts an OpenSSH public key (rsa only) to a PKCS#8 PEM file.
|
||
|
|
*
|
||
|
|
* The intent of this module is to interoperate with OpenSSL only,
|
||
|
|
* specifically the node crypto module's `verify` method.
|
||
|
|
*
|
||
|
|
* @param {String} key an OpenSSH public key.
|
||
|
|
* @return {String} PEM encoded form of the RSA public key.
|
||
|
|
* @throws {TypeError} on bad input.
|
||
|
|
* @throws {Error} on invalid ssh key formatted data.
|
||
|
|
*/
|
||
|
|
sshKeyToPEM: function sshKeyToPEM(key) {
|
||
|
|
assert.string(key, 'ssh_key');
|
||
|
|
|
||
|
|
var k = sshpk.parseKey(key, 'ssh');
|
||
|
|
return (k.toString('pem'));
|
||
|
|
},
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates an OpenSSH fingerprint from an ssh public key.
|
||
|
|
*
|
||
|
|
* @param {String} key an OpenSSH public key.
|
||
|
|
* @return {String} key fingerprint.
|
||
|
|
* @throws {TypeError} on bad input.
|
||
|
|
* @throws {Error} if what you passed doesn't look like an ssh public key.
|
||
|
|
*/
|
||
|
|
fingerprint: function fingerprint(key) {
|
||
|
|
assert.string(key, 'ssh_key');
|
||
|
|
|
||
|
|
var k = sshpk.parseKey(key, 'ssh');
|
||
|
|
return (k.fingerprint('md5').toString('hex'));
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts a PKGCS#8 PEM file to an OpenSSH public key (rsa)
|
||
|
|
*
|
||
|
|
* The reverse of the above function.
|
||
|
|
*/
|
||
|
|
pemToRsaSSHKey: function pemToRsaSSHKey(pem, comment) {
|
||
|
|
assert.equal('string', typeof (pem), 'typeof pem');
|
||
|
|
|
||
|
|
var k = sshpk.parseKey(pem, 'pem');
|
||
|
|
k.comment = comment;
|
||
|
|
return (k.toString('ssh'));
|
||
|
|
}
|
||
|
|
};
|