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Edit File : ed-compat.js \| Size : 2.37 KB
// Copyright 2015 Joyent, Inc. module.exports = { Verifier: Verifier, Signer: Signer }; var nacl; var stream = require('stream'); var util = require('util'); var assert = require('assert-plus'); var Buffer = require('safer-buffer').Buffer; var Signature = require('./signature'); function Verifier(key, hashAlgo) { if (nacl === undefined) nacl = require('tweetnacl'); if (hashAlgo.toLowerCase() !== 'sha512') throw (new Error('ED25519 only supports the use of ' + 'SHA-512 hashes')); this.key = key; this.chunks = []; stream.Writable.call(this, {}); } util.inherits(Verifier, stream.Writable); Verifier.prototype._write = function (chunk, enc, cb) { this.chunks.push(chunk); cb(); }; Verifier.prototype.update = function (chunk) { if (typeof (chunk) === 'string') chunk = Buffer.from(chunk, 'binary'); this.chunks.push(chunk); }; Verifier.prototype.verify = function (signature, fmt) { var sig; if (Signature.isSignature(signature, [2, 0])) { if (signature.type !== 'ed25519') return (false); sig = signature.toBuffer('raw'); } else if (typeof (signature) === 'string') { sig = Buffer.from(signature, 'base64'); } else if (Signature.isSignature(signature, [1, 0])) { throw (new Error('signature was created by too old ' + 'a version of sshpk and cannot be verified')); } assert.buffer(sig); return (nacl.sign.detached.verify( new Uint8Array(Buffer.concat(this.chunks)), new Uint8Array(sig), new Uint8Array(this.key.part.A.data))); }; function Signer(key, hashAlgo) { if (nacl === undefined) nacl = require('tweetnacl'); if (hashAlgo.toLowerCase() !== 'sha512') throw (new Error('ED25519 only supports the use of ' + 'SHA-512 hashes')); this.key = key; this.chunks = []; stream.Writable.call(this, {}); } util.inherits(Signer, stream.Writable); Signer.prototype._write = function (chunk, enc, cb) { this.chunks.push(chunk); cb(); }; Signer.prototype.update = function (chunk) { if (typeof (chunk) === 'string') chunk = Buffer.from(chunk, 'binary'); this.chunks.push(chunk); }; Signer.prototype.sign = function () { var sig = nacl.sign.detached( new Uint8Array(Buffer.concat(this.chunks)), new Uint8Array(Buffer.concat([ this.key.part.k.data, this.key.part.A.data]))); var sigBuf = Buffer.from(sig); var sigObj = Signature.parse(sigBuf, 'ed25519', 'raw'); sigObj.hashAlgorithm = 'sha512'; return (sigObj); }; Back

Edit File : ed-compat.js | Size : 2.37 KB

module.exports = {
	Verifier: Verifier,
	Signer: Signer
};

var nacl;
var stream = require('stream');
var util = require('util');
var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
var Signature = require('./signature');

function Verifier(key, hashAlgo) {
	if (nacl === undefined)
		nacl = require('tweetnacl');

if (hashAlgo.toLowerCase() !== 'sha512')
		throw (new Error('ED25519 only supports the use of ' +
		    'SHA-512 hashes'));

this.key = key;
	this.chunks = [];

stream.Writable.call(this, {});
}
util.inherits(Verifier, stream.Writable);

Verifier.prototype._write = function (chunk, enc, cb) {
	this.chunks.push(chunk);
	cb();
};

Verifier.prototype.update = function (chunk) {
	if (typeof (chunk) === 'string')
		chunk = Buffer.from(chunk, 'binary');
	this.chunks.push(chunk);
};

Verifier.prototype.verify = function (signature, fmt) {
	var sig;
	if (Signature.isSignature(signature, [2, 0])) {
		if (signature.type !== 'ed25519')
			return (false);
		sig = signature.toBuffer('raw');

} else if (typeof (signature) === 'string') {
		sig = Buffer.from(signature, 'base64');

} else if (Signature.isSignature(signature, [1, 0])) {
		throw (new Error('signature was created by too old ' +
		    'a version of sshpk and cannot be verified'));
	}

assert.buffer(sig);
	return (nacl.sign.detached.verify(
	    new Uint8Array(Buffer.concat(this.chunks)),
	    new Uint8Array(sig),
	    new Uint8Array(this.key.part.A.data)));
};

function Signer(key, hashAlgo) {
	if (nacl === undefined)
		nacl = require('tweetnacl');

if (hashAlgo.toLowerCase() !== 'sha512')
		throw (new Error('ED25519 only supports the use of ' +
		    'SHA-512 hashes'));

this.key = key;
	this.chunks = [];

stream.Writable.call(this, {});
}
util.inherits(Signer, stream.Writable);

Signer.prototype._write = function (chunk, enc, cb) {
	this.chunks.push(chunk);
	cb();
};

Signer.prototype.update = function (chunk) {
	if (typeof (chunk) === 'string')
		chunk = Buffer.from(chunk, 'binary');
	this.chunks.push(chunk);
};

Signer.prototype.sign = function () {
	var sig = nacl.sign.detached(
	    new Uint8Array(Buffer.concat(this.chunks)),
	    new Uint8Array(Buffer.concat([
		this.key.part.k.data, this.key.part.A.data])));
	var sigBuf = Buffer.from(sig);
	var sigObj = Signature.parse(sigBuf, 'ed25519', 'raw');
	sigObj.hashAlgorithm = 'sha512';
	return (sigObj);
};

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