private-box - npm Package Compare versions

Comparing version 0.1.1 to 0.2.0

index.js

		@@ -15,10 +15,20 @@

		const MAX = 7
		function setMax (m) {
		m = m \|\| DEFAULT_MAX
		if (m < 1 \|\| m > 255)
		throw new Error('max recipients must be between 0 and 255.')
		return m
		}


		const DEFAULT_MAX = 7

		exports.encrypt =
		exports.multibox = function (msg, recipients) {
		exports.multibox = function (msg, recipients, max) {

		if(recipients.length > MAX)
		throw new Error('max recipients is:'+MAX+' found:'+recipients.length)
		max = setMax(max)

		if(recipients.length > max)
		throw new Error('max recipients is:'+max+' found:'+recipients.length)

		var nonce = randombytes(24)
		@@ -28,3 +38,3 @@ var key = randombytes(32)

		var _key = concat([new Buffer([recipients.length & MAX]), key])
		var _key = concat([new Buffer([recipients.length & max]), key])
		return concat([
		@@ -45,4 +55,6 @@ nonce,
		exports.decrypt =
		exports.multibox_open = function (ctxt, sk) { //, groups...
		exports.multibox_open = function (ctxt, sk, max) { //, groups...

		max = setMax(max)

		var nonce = ctxt.slice(0, 24)
		@@ -52,3 +64,3 @@ var onetime_pk = ctxt.slice(24, 24+32)
		var _key, key, length, start = 24+32, size = 32+1+16
		for(var i = 0; i <= MAX; i++) {
		for(var i = 0; i <= max; i++) {
		var s = start+size*i
		@@ -55,0 +67,0 @@ if(s + size > (ctxt.length - 16)) continue

package.json

		{
		"name": "private-box",
		"description": "encrypt a message to a secret number of recipients",
		"version": "0.1.1",
		"version": "0.2.0",
		"homepage": "https://github.com/auditdrivencrypto/private-box",
		@@ -6,0 +6,0 @@ "repository": {

test/index.js

		@@ -13,2 +13,6 @@

		function arrayOfSize (n) {
		return new Array(n+1).join('0').split('')
		}

		tape('simple', function (t) {
		@@ -46,18 +50,41 @@

		tape('encrypt/decrypt to many keys', function (t) {
		function encryptDecryptTo (n, t) {
		var msg = crypto.randomBytes(1024)
		var keys = [1,2,3,4,5,6,7].map(function () { return keypair() })
		var keys = arrayOfSize(n).map(function () { return keypair() })

		var ctxt = c.multibox(msg, keys.map(function (e) { return e.publicKey }))
		var ctxt = c.multibox(msg, keys.map(function (e) { return e.publicKey }), n)

		// a recipient key may open the message.
		keys.forEach(function (keys) {
		t.deepEqual(c.multibox_open(ctxt, keys.secretKey), msg)
		t.deepEqual(c.multibox_open(ctxt, keys.secretKey, n), msg)
		})

		t.equal(c.multibox_open(ctxt, keypair().secretKey), undefined)
		}

		tape('with no custom max set, encrypt/decrypt to 7 keys', function (t) {
		encryptDecryptTo(7, t)
		t.end()
		})

		tape('can encrypt/decrypt up to 255 recipients after setting a custom max', function (t) {
		encryptDecryptTo(255, t)
		t.end()
		})


		tape('errors when max is more than 255 or less than 1', function (t) {
		var msg = new Buffer('hello there!')
		var ctxt = c.multibox(msg, [alice.publicKey, bob.publicKey])
		var pk = alice.publicKey
		var sk = alice.secretKey
		t.throws(function () {
		c.multibox(msg, [
		pk,pk,pk,pk,
		], -1)
		})
		t.throws(function () {
		c.multibox.open(ctxt, sk, 256)
		})
		t.end()
		})

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