0.7.3

* add crypto_auth_hmac methods

.travis.yml

@@ -0,0 +1,18 @@
+language: node_js
+node_js:
+  - lts/*
+env:
+  global:
+    - MOZ_HEADLESS=1
+services:
+  - xvfb
+addons:
+  firefox: latest
+  chrome: stable
+cache:
+  npm: false
+
+script:
+  - npm test
+  - xvfb-run --auto-servernum npm run test-browser -- --browser chrome
+  - xvfb-run --auto-servernum npm run test-browser -- --browser firefox

README.md

@@ -1,31 +1,29 @@
-# sodium-javascript
+# `sodium-javascript`
 
-WIP - a pure javascript version of [sodium-native](https://github.com/mafintosh/sodium-native).
+[![Build Status](https://travis-ci.org/sodium-friends/sodium-javascript.svg?branch=master)](https://travis-ci.org/sodium-friends/sodium-javascript)
+
+> WIP - a pure javascript version of [sodium-native](https://github.com/sodium-friends/sodium-native).
 Based on tweetnacl
 
-```
-npm install sodium-javascript
-```
-
 ## Usage
 
 ``` js
-var sodium = require('sodium-javascript')
+const sodium = require('sodium-javascript')
 
-var key = new Buffer(sodium.crypto_secretbox_KEYBYTES)
-var nonce = new Buffer(sodium.crypto_secretbox_NONCEBYTES)
+const key = Buffer.alloc(sodium.crypto_secretbox_KEYBYTES)
+const nonce = Buffer.alloc(sodium.crypto_secretbox_NONCEBYTES)
 
 sodium.randombytes_buf(key)
 sodium.randombytes_buf(nonce)
 
-var message = new Buffer('Hello, World!')
-var cipher = new Buffer(message.length + sodium.crypto_secretbox_MACBYTES)
+const message = Buffer.from('Hello, World!')
+const cipher = Buffer.alloc(message.length + sodium.crypto_secretbox_MACBYTES)
 
 sodium.crypto_secretbox_easy(cipher, message, nonce, key)
 
 console.log('Encrypted:', cipher)
 
-var plainText = new Buffer(cipher.length - sodium.crypto_secretbox_MACBYTES)
+const plainText = Buffer.alloc(cipher.length - sodium.crypto_secretbox_MACBYTES)
 
 sodium.crypto_secretbox_open_easy(plainText, cipher, nonce, key)
 
@@ -34,9 +32,20 @@ console.log('Plaintext:', plainText.toString())
 
 ## API
 
-See [sodium-native](https://github.com/mafintosh/sodium-native).
-This is a work in progress so all functions are not implemented yet.
+See [sodium-native](https://github.com/sodium-friends/sodium-native).
+This is a work in progress so not all functions are implemented yet.
+
+This module is organised into individual submodules which can be required
+independently for smaller bundles in the browser. To leverage automatic
+switching between `sodium-javascript` and `sodium-native`, see
+[`sodium-universal`](https://github.com/sodium-friends/sodium-universal).
+
+## Install
+
+```
+npm install sodium-javascript
+```
 
 ## License
 
-MIT
+[MIT](LICENSE)

crypto_aead.js

@@ -0,0 +1,160 @@
+/* eslint-disable camelcase */
+const { crypto_stream_chacha20_ietf, crypto_stream_chacha20_ietf_xor_ic } = require('./crypto_stream_chacha20')
+const { crypto_verify_16 } = require('./crypto_verify')
+const Poly1305 = require('./internal/poly1305')
+const assert = require('nanoassert')
+
+const crypto_aead_chacha20poly1305_ietf_KEYBYTES = 32
+const crypto_aead_chacha20poly1305_ietf_NSECBYTES = 0
+const crypto_aead_chacha20poly1305_ietf_NPUBBYTES = 12
+const crypto_aead_chacha20poly1305_ietf_ABYTES = 16
+const crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
+
+const _pad0 = new Uint8Array(16)
+
+function crypto_aead_chacha20poly1305_ietf_encrypt (c, m, ad, nsec, npub, k) {
+  if (ad === null) return crypto_aead_chacha20poly1305_ietf_encrypt(c, m, new Uint8Array(0), nsec, npub, k)
+
+  assert(c.byteLength === m.byteLength + crypto_aead_chacha20poly1305_ietf_ABYTES,
+    "ciphertext should be 'crypto_aead_chacha20poly1305_ietf_ABYTES' longer than message")
+  assert(npub.byteLength === crypto_aead_chacha20poly1305_ietf_NPUBBYTES,
+    "npub should be 'crypto_aead_chacha20poly1305_ietf_NPUBBYTES' long")
+  assert(k.byteLength === crypto_aead_chacha20poly1305_ietf_KEYBYTES,
+    "k should be 'crypto_aead_chacha20poly1305_ietf_KEYBYTES' long")
+  assert(m.byteLength <= crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX, 'message is too large')
+
+  const ret = crypto_aead_chacha20poly1305_ietf_encrypt_detached(c.subarray(0, m.byteLength),
+    c.subarray(m.byteLength), m, ad, nsec, npub, k)
+
+  return m.byteLength + ret
+}
+
+function crypto_aead_chacha20poly1305_ietf_encrypt_detached (c, mac, m, ad, nsec, npub, k) {
+  if (ad === null) return crypto_aead_chacha20poly1305_ietf_encrypt_detached(c, mac, m, new Uint8Array(0), nsec, npub, k)
+
+  assert(c.byteLength === m.byteLength, 'ciphertext should be same length than message')
+  assert(npub.byteLength === crypto_aead_chacha20poly1305_ietf_NPUBBYTES,
+    "npub should be 'crypto_aead_chacha20poly1305_ietf_NPUBBYTES' long")
+  assert(k.byteLength === crypto_aead_chacha20poly1305_ietf_KEYBYTES,
+    "k should be 'crypto_aead_chacha20poly1305_ietf_KEYBYTES' long")
+  assert(m.byteLength <= crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX, 'message is too large')
+  assert(mac.byteLength <= crypto_aead_chacha20poly1305_ietf_ABYTES,
+    "mac should be 'crypto_aead_chacha20poly1305_ietf_ABYTES' long")
+
+  const block0 = new Uint8Array(64)
+  var slen = new Uint8Array(8)
+
+  crypto_stream_chacha20_ietf(block0, npub, k)
+  const poly = new Poly1305(block0)
+  block0.fill(0)
+
+  poly.update(ad, 0, ad.byteLength)
+  poly.update(_pad0, 0, (0x10 - ad.byteLength) & 0xf)
+
+  crypto_stream_chacha20_ietf_xor_ic(c, m, npub, 1, k)
+
+  poly.update(c, 0, m.byteLength)
+  poly.update(_pad0, 0, (0x10 - m.byteLength) & 0xf)
+
+  write64LE(slen, 0, ad.byteLength)
+  poly.update(slen, 0, slen.byteLength)
+
+  write64LE(slen, 0, m.byteLength)
+  poly.update(slen, 0, slen.byteLength)
+
+  poly.finish(mac, 0)
+  slen.fill(0)
+
+  return crypto_aead_chacha20poly1305_ietf_ABYTES
+}
+
+function crypto_aead_chacha20poly1305_ietf_decrypt (m, nsec, c, ad, npub, k) {
+  if (ad === null) return crypto_aead_chacha20poly1305_ietf_decrypt(m, nsec, c, new Uint8Array(0), npub, k)
+
+  assert(m.byteLength === c.byteLength - crypto_aead_chacha20poly1305_ietf_ABYTES,
+    "message should be 'crypto_aead_chacha20poly1305_ietf_ABYTES' shorter than ciphertext")
+  assert(npub.byteLength === crypto_aead_chacha20poly1305_ietf_NPUBBYTES,
+    "npub should be 'crypto_aead_chacha20poly1305_ietf_NPUBBYTES' long")
+  assert(k.byteLength === crypto_aead_chacha20poly1305_ietf_KEYBYTES,
+    "k should be 'crypto_aead_chacha20poly1305_ietf_KEYBYTES' long")
+  assert(m.byteLength <= crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX, 'message is too large')
+
+  if (c.byteLength < crypto_aead_chacha20poly1305_ietf_ABYTES) throw new Error('could not verify data')
+
+  crypto_aead_chacha20poly1305_ietf_decrypt_detached(
+    m, nsec,
+    c.subarray(0, c.byteLength - crypto_aead_chacha20poly1305_ietf_ABYTES),
+    c.subarray(c.byteLength - crypto_aead_chacha20poly1305_ietf_ABYTES),
+    ad, npub, k)
+
+  return c.byteLength - crypto_aead_chacha20poly1305_ietf_ABYTES
+}
+
+function crypto_aead_chacha20poly1305_ietf_decrypt_detached (m, nsec, c, mac, ad, npub, k) {
+  if (ad === null) return crypto_aead_chacha20poly1305_ietf_decrypt_detached(m, nsec, c, mac, new Uint8Array(0), npub, k)
+
+  assert(c.byteLength === m.byteLength, 'message should be same length than ciphertext')
+  assert(npub.byteLength === crypto_aead_chacha20poly1305_ietf_NPUBBYTES,
+    "npub should be 'crypto_aead_chacha20poly1305_ietf_NPUBBYTES' long")
+  assert(k.byteLength === crypto_aead_chacha20poly1305_ietf_KEYBYTES,
+    "k should be 'crypto_aead_chacha20poly1305_ietf_KEYBYTES' long")
+  assert(m.byteLength <= crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX, 'message is too large')
+  assert(mac.byteLength <= crypto_aead_chacha20poly1305_ietf_ABYTES,
+    "mac should be 'crypto_aead_chacha20poly1305_ietf_ABYTES' long")
+
+  const block0 = new Uint8Array(64)
+  const slen = new Uint8Array(8)
+  const computed_mac = new Uint8Array(crypto_aead_chacha20poly1305_ietf_ABYTES)
+
+  crypto_stream_chacha20_ietf(block0, npub, k)
+  const poly = new Poly1305(block0)
+  block0.fill(0)
+
+  poly.update(ad, 0, ad.byteLength)
+  poly.update(_pad0, 0, (0x10 - ad.byteLength) & 0xf)
+
+  const mlen = c.byteLength
+  poly.update(c, 0, mlen)
+  poly.update(_pad0, 0, (0x10 - mlen) & 0xf)
+
+  write64LE(slen, 0, ad.byteLength)
+  poly.update(slen, 0, slen.byteLength)
+
+  write64LE(slen, 0, mlen)
+  poly.update(slen, 0, slen.byteLength)
+
+  poly.finish(computed_mac, 0)
+
+  assert(computed_mac.byteLength === 16)
+  const ret = crypto_verify_16(computed_mac, 0, mac, 0)
+
+  computed_mac.fill(0)
+  slen.fill(0)
+
+  if (!ret) {
+    m.fill(0)
+    throw new Error('could not verify data')
+  }
+
+  crypto_stream_chacha20_ietf_xor_ic(m, c, npub, 1, k)
+}
+
+function write64LE (buf, offset, int) {
+  buf.fill(0, 0, 8)
+
+  const view = new DataView(buf.buffer, buf.byteOffset, buf.byteLength)
+  view.setUint32(offset, int & 0xffffffff, true)
+  view.setUint32(offset + 4, (int / 2 ** 32) & 0xffffffff, true)
+}
+
+module.exports = {
+  crypto_aead_chacha20poly1305_ietf_encrypt,
+  crypto_aead_chacha20poly1305_ietf_encrypt_detached,
+  crypto_aead_chacha20poly1305_ietf_decrypt,
+  crypto_aead_chacha20poly1305_ietf_decrypt_detached,
+  crypto_aead_chacha20poly1305_ietf_ABYTES,
+  crypto_aead_chacha20poly1305_ietf_KEYBYTES,
+  crypto_aead_chacha20poly1305_ietf_NPUBBYTES,
+  crypto_aead_chacha20poly1305_ietf_NSECBYTES,
+  crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX
+}

crypto_auth.js

@@ -0,0 +1,35 @@
+/* eslint-disable camelcase */
+const { crypto_verify_32 } = require('./crypto_verify')
+const Sha512 = require('sha512-universal')
+const assert = require('nanoassert')
+
+const crypto_auth_BYTES = 32
+const crypto_auth_KEYBYTES = 32
+
+function crypto_auth (out, input, k) {
+  assert(out.byteLength === crypto_auth_BYTES, "out should be 'crypto_auth_BYTES' in length")
+  assert(k.byteLength === crypto_auth_KEYBYTES, "key should be 'crypto_auth_KEYBYTES' in length")
+
+  const out0 = new Uint8Array(64)
+  const hmac = Sha512.HMAC(k)
+  hmac.update(input)
+  hmac.digest(out0)
+
+  out.set(out0.subarray(0, 32))
+}
+
+function crypto_auth_verify (h, input, k) {
+  assert(h.byteLength === crypto_auth_BYTES, "h should be 'crypto_auth_BYTES' in length")
+  assert(k.byteLength === crypto_auth_KEYBYTES, "key should be 'crypto_auth_KEYBYTES' in length")
+
+  const correct = Sha512.HMAC(k).update(input).digest()
+
+  return crypto_verify_32(h, 0, correct, 0)
+}
+
+module.exports = {
+  crypto_auth_BYTES,
+  crypto_auth_KEYBYTES,
+  crypto_auth,
+  crypto_auth_verify
+}

crypto_box.js

@@ -0,0 +1,200 @@
+/* eslint-disable camelcase */
+const { crypto_hash_sha512 } = require('./crypto_hash')
+const { crypto_scalarmult, crypto_scalarmult_base } = require('./crypto_scalarmult')
+const { randombytes } = require('./randombytes')
+const { crypto_generichash_batch } = require('./crypto_generichash')
+const { crypto_stream_xsalsa20_MESSAGEBYTES_MAX } = require('./crypto_stream')
+const {
+  crypto_secretbox_open_easy,
+  crypto_secretbox_easy,
+  crypto_secretbox_detached,
+  crypto_secretbox_open_detached
+} = require('./crypto_secretbox')
+const xsalsa20 = require('xsalsa20')
+const assert = require('nanoassert')
+
+const crypto_box_PUBLICKEYBYTES = 32
+const crypto_box_SECRETKEYBYTES = 32
+const crypto_box_NONCEBYTES = 24
+const crypto_box_ZEROBYTES = 32
+const crypto_box_BOXZEROBYTES = 16
+const crypto_box_SEALBYTES = 48
+const crypto_box_SEEDBYTES = 32
+const crypto_box_BEFORENMBYTES = 32
+const crypto_box_MACBYTES = 16
+
+const crypto_box_curve25519xsalsa20poly1305_MACBYTES = 16
+
+const crypto_box_MESSAGEBYTES_MAX =
+  crypto_stream_xsalsa20_MESSAGEBYTES_MAX -
+  crypto_box_curve25519xsalsa20poly1305_MACBYTES
+
+module.exports = {
+  crypto_box_easy,
+  crypto_box_open_easy,
+  crypto_box_keypair,
+  crypto_box_seed_keypair,
+  crypto_box_seal,
+  crypto_box_seal_open,
+  crypto_box_PUBLICKEYBYTES,
+  crypto_box_SECRETKEYBYTES,
+  crypto_box_NONCEBYTES,
+  crypto_box_ZEROBYTES,
+  crypto_box_BOXZEROBYTES,
+  crypto_box_SEALBYTES,
+  crypto_box_SEEDBYTES,
+  crypto_box_BEFORENMBYTES,
+  crypto_box_MACBYTES
+}
+
+function crypto_box_keypair (pk, sk) {
+  check(pk, crypto_box_PUBLICKEYBYTES)
+  check(sk, crypto_box_SECRETKEYBYTES)
+  randombytes(sk, 32)
+  return crypto_scalarmult_base(pk, sk)
+}
+function crypto_box_seed_keypair (pk, sk, seed) {
+  assert(pk.byteLength === crypto_box_PUBLICKEYBYTES, "pk should be 'crypto_box_PUBLICKEYBYTES' bytes")
+  assert(sk.byteLength === crypto_box_SECRETKEYBYTES, "sk should be 'crypto_box_SECRETKEYBYTES' bytes")
+  assert(sk.byteLength === crypto_box_SEEDBYTES, "sk should be 'crypto_box_SEEDBYTES' bytes")
+
+  const hash = new Uint8Array(64)
+  crypto_hash_sha512(hash, seed, 32)
+  sk.set(hash.subarray(0, 32))
+  hash.fill(0)
+
+  return crypto_scalarmult_base(pk, sk)
+}
+
+function crypto_box_seal (c, m, pk) {
+  check(c, crypto_box_SEALBYTES + m.length)
+  check(pk, crypto_box_PUBLICKEYBYTES)
+
+  var epk = c.subarray(0, crypto_box_PUBLICKEYBYTES)
+  var esk = new Uint8Array(crypto_box_SECRETKEYBYTES)
+  crypto_box_keypair(epk, esk)
+
+  var n = new Uint8Array(crypto_box_NONCEBYTES)
+  crypto_generichash_batch(n, [epk, pk])
+
+  var s = new Uint8Array(crypto_box_PUBLICKEYBYTES)
+  crypto_scalarmult(s, esk, pk)
+
+  var k = new Uint8Array(crypto_box_BEFORENMBYTES)
+  var zero = new Uint8Array(16)
+  xsalsa20.core_hsalsa20(k, zero, s, xsalsa20.SIGMA)
+
+  crypto_secretbox_easy(c.subarray(epk.length), m, n, k)
+
+  cleanup(esk)
+}
+
+function crypto_box_seal_open (m, c, pk, sk) {
+  check(c, crypto_box_SEALBYTES)
+  check(m, c.length - crypto_box_SEALBYTES)
+  check(pk, crypto_box_PUBLICKEYBYTES)
+  check(sk, crypto_box_SECRETKEYBYTES)
+
+  var epk = c.subarray(0, crypto_box_PUBLICKEYBYTES)
+
+  var n = new Uint8Array(crypto_box_NONCEBYTES)
+  crypto_generichash_batch(n, [epk, pk])
+
+  var s = new Uint8Array(crypto_box_PUBLICKEYBYTES)
+  crypto_scalarmult(s, sk, epk)
+
+  var k = new Uint8Array(crypto_box_BEFORENMBYTES)
+  var zero = new Uint8Array(16)
+  xsalsa20.core_hsalsa20(k, zero, s, xsalsa20.SIGMA)
+
+  return crypto_secretbox_open_easy(m, c.subarray(epk.length), n, k)
+}
+
+function crypto_box_beforenm (k, pk, sk) {
+  const zero = new Uint8Array(16)
+  const s = new Uint8Array(32)
+
+  assert(crypto_scalarmult(s, sk, pk) === 0)
+
+  xsalsa20.core_hsalsa20(k, zero, s, xsalsa20.SIGMA)
+
+  return true
+}
+
+function crypto_box_detached_afternm (c, mac, m, n, k) {
+  return crypto_secretbox_detached(c, mac, m, n, k)
+}
+
+function crypto_box_detached (c, mac, m, n, pk, sk) {
+  check(mac, crypto_box_MACBYTES)
+  check(n, crypto_box_NONCEBYTES)
+  check(pk, crypto_box_PUBLICKEYBYTES)
+  check(sk, crypto_box_SECRETKEYBYTES)
+
+  const k = new Uint8Array(crypto_box_BEFORENMBYTES)
+
+  assert(crypto_box_beforenm(k, pk, sk))
+
+  const ret = crypto_box_detached_afternm(c, mac, m, n, k)
+  cleanup(k)
+
+  return ret
+}
+
+function crypto_box_easy (c, m, n, pk, sk) {
+  assert(
+    c.length >= m.length + crypto_box_MACBYTES,
+    "c should be at least 'm.length + crypto_box_MACBYTES' bytes"
+  )
+  assert(
+    m.length <= crypto_box_MESSAGEBYTES_MAX,
+    "m should be at most 'crypto_box_MESSAGEBYTES_MAX' bytes"
+  )
+
+  return crypto_box_detached(
+    c.subarray(crypto_box_MACBYTES, m.length + crypto_box_MACBYTES),
+    c.subarray(0, crypto_box_MACBYTES),
+    m,
+    n,
+    pk,
+    sk
+  )
+}
+
+function crypto_box_open_detached_afternm (m, c, mac, n, k) {
+  return crypto_secretbox_open_detached(m, c, mac, n, k)
+}
+
+function crypto_box_open_detached (m, c, mac, n, pk, sk) {
+  const k = new Uint8Array(crypto_box_BEFORENMBYTES)
+  assert(crypto_box_beforenm(k, pk, sk))
+
+  const ret = crypto_box_open_detached_afternm(m, c, mac, n, k)
+  cleanup(k)
+
+  return ret
+}
+
+function crypto_box_open_easy (m, c, n, pk, sk) {
+  assert(
+    c.length >= m.length + crypto_box_MACBYTES,
+    "c should be at least 'm.length + crypto_box_MACBYTES' bytes"
+  )
+
+  return crypto_box_open_detached(
+    m,
+    c.subarray(crypto_box_MACBYTES, m.length + crypto_box_MACBYTES),
+    c.subarray(0, crypto_box_MACBYTES),
+    n,
+    pk,
+    sk
+  )
+}
+
+function check (buf, len) {
+  if (!buf || (len && buf.length < len)) throw new Error('Argument must be a buffer' + (len ? ' of length ' + len : ''))
+}
+
+function cleanup (arr) {
+  for (let i = 0; i < arr.length; i++) arr[i] = 0
+}

crypto_generichash.js

@@ -1,6 +1,7 @@
-var assert = require('assert')
 var blake2b = require('blake2b')
 
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
 module.exports.crypto_generichash_PRIMITIVE = 'blake2b'
 module.exports.crypto_generichash_BYTES_MIN = blake2b.BYTES_MIN
 module.exports.crypto_generichash_BYTES_MAX = blake2b.BYTES_MAX
@@ -8,13 +9,17 @@ module.exports.crypto_generichash_BYTES = blake2b.BYTES
 module.exports.crypto_generichash_KEYBYTES_MIN = blake2b.KEYBYTES_MIN
 module.exports.crypto_generichash_KEYBYTES_MAX = blake2b.KEYBYTES_MAX
 module.exports.crypto_generichash_KEYBYTES = blake2b.KEYBYTES
+module.exports.crypto_generichash_WASM_SUPPORTED = blake2b.WASM_SUPPORTED
+module.exports.crypto_generichash_WASM_LOADED = false
 
 module.exports.crypto_generichash = function (output, input, key) {
-  blake2b(output, input, key)
+  blake2b(output.length, key).update(input).final(output)
 }
 
+module.exports.crypto_generichash_ready = blake2b.ready
+
 module.exports.crypto_generichash_batch = function (output, inputArray, key) {
-  var ctx = blake2b.instance(output.length, key)
+  var ctx = blake2b(output.length, key)
   for (var i = 0; i < inputArray.length; i++) {
     ctx.update(inputArray[i])
   }
@@ -23,5 +28,9 @@ module.exports.crypto_generichash_batch = function (output, inputArray, key) {
 
 module.exports.crypto_generichash_instance = function (key, outlen) {
   if (outlen == null) outlen = module.exports.crypto_generichash_BYTES
-  return blake2b.instance(outlen, key)
+  return blake2b(outlen, key)
 }
+
+blake2b.ready(function (_) {
+  module.exports.crypto_generichash_WASM_LOADED = blake2b.WASM_LOADED
+})

crypto_hash.js

@@ -0,0 +1,26 @@
+/* eslint-disable camelcase */
+const sha512 = require('sha512-universal')
+const assert = require('nanoassert')
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+const crypto_hash_sha512_BYTES = 64
+const crypto_hash_BYTES = crypto_hash_sha512_BYTES
+
+function crypto_hash_sha512 (out, m, n) {
+  assert(out.byteLength === crypto_hash_sha512_BYTES, "out must be 'crypto_hash_sha512_BYTES' bytes long")
+
+  sha512().update(m.subarray(0, n)).digest(out)
+  return 0
+}
+
+function crypto_hash (out, m, n) {
+  return crypto_hash_sha512(out, m, n)
+}
+
+module.exports = {
+  crypto_hash,
+  crypto_hash_sha512,
+  crypto_hash_sha512_BYTES,
+  crypto_hash_BYTES
+}

crypto_hash_sha256.js

@@ -0,0 +1,19 @@
+/* eslint-disable camelcase */
+const sha256 = require('sha256-universal')
+const assert = require('nanoassert')
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+const crypto_hash_sha256_BYTES = 32
+
+function crypto_hash_sha256 (out, m, n) {
+  assert(out.byteLength === crypto_hash_sha256_BYTES, "out must be 'crypto_hash_sha256_BYTES' bytes long")
+
+  sha256().update(m.subarray(0, n)).digest(out)
+  return 0
+}
+
+module.exports = {
+  crypto_hash_sha256,
+  crypto_hash_sha256_BYTES
+}

crypto_kdf.js

@@ -1,14 +1,15 @@
-var assert = require('assert')
-var randombytes_buf = require('.').randombytes_buf
-var blake2b = require('blake2b')
+/* eslint-disable camelcase */
+const assert = require('nanoassert')
+const randombytes_buf = require('./randombytes').randombytes_buf
+const blake2b = require('blake2b')
 
 module.exports.crypto_kdf_PRIMITIVE = 'blake2b'
 module.exports.crypto_kdf_BYTES_MIN = 16
 module.exports.crypto_kdf_BYTES_MAX = 64
 module.exports.crypto_kdf_CONTEXTBYTES = 8
-module.exports.crypto_kdf_KEYBYTES = 64
+module.exports.crypto_kdf_KEYBYTES = 32
 
-function STORE64_LE(dest, int) {
+function STORE64_LE (dest, int) {
   var mul = 1
   var i = 0
   dest[0] = int & 0xFF
@@ -18,20 +19,22 @@ function STORE64_LE(dest, int) {
 }
 
 module.exports.crypto_kdf_derive_from_key = function crypto_kdf_derive_from_key (subkey, subkey_id, ctx, key) {
-  assert(subkey.length >= module.exports.crypto_kdf_BYTES_MIN, 'subkey must be')
-  assert(ctx.length >= module.exports.crypto_kdf_CONTEXTBYTES, 'context must be')
+  assert(subkey.length >= module.exports.crypto_kdf_BYTES_MIN, 'subkey must be at least crypto_kdf_BYTES_MIN')
+  assert(subkey_id >= 0 && subkey_id <= 0x1fffffffffffff, 'subkey_id must be safe integer')
+  assert(ctx.length >= module.exports.crypto_kdf_CONTEXTBYTES, 'context must be at least crypto_kdf_CONTEXTBYTES')
 
   var ctx_padded = new Uint8Array(blake2b.PERSONALBYTES)
   var salt = new Uint8Array(blake2b.SALTBYTES)
 
   ctx_padded.set(ctx, 0, module.exports.crypto_kdf_CONTEXTBYTES)
-
   STORE64_LE(salt, subkey_id)
 
-  blake2b(subkey.slice(0, Math.min(subkey.length, module.exports.crypto_kdf_BYTES_MAX)), [], key, salt, ctx_padded, true)
+  var outlen = Math.min(subkey.length, module.exports.crypto_kdf_BYTES_MAX)
+  blake2b(outlen, key.subarray(0, module.exports.crypto_kdf_KEYBYTES), salt, ctx_padded, true)
+    .final(subkey)
 }
 
 module.exports.crypto_kdf_keygen = function crypto_kdf_keygen (out) {
-  assert(out.length >= module.exports.crypto_kdf_KEYBYTES)
-  randombytes_buf(out, module.exports.crypto_kdf_KEYBYTES)
+  assert(out.length >= module.exports.crypto_kdf_KEYBYTES, 'out.length must be crypto_kdf_KEYBYTES')
+  randombytes_buf(out.subarray(0, module.exports.crypto_kdf_KEYBYTES))
 }

crypto_kx.js

@@ -0,0 +1,34 @@
+/* eslint-disable camelcase */
+const { crypto_scalarmult_base } = require('./crypto_scalarmult')
+const { crypto_generichash } = require('./crypto_generichash')
+const { randombytes_buf } = require('./randombytes')
+const assert = require('nanoassert')
+
+const crypto_kx_SEEDBYTES = 32
+const crypto_kx_PUBLICKEYBYTES = 32
+const crypto_kx_SECRETKEYBYTES = 32
+
+function crypto_kx_keypair (pk, sk) {
+  assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
+  assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
+
+  randombytes_buf(sk, crypto_kx_SECRETKEYBYTES)
+  return crypto_scalarmult_base(pk, sk)
+}
+
+function crypto_kx_seed_keypair (pk, sk, seed) {
+  assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
+  assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
+  assert(seed.byteLength === crypto_kx_SEEDBYTES, "seed must be 'crypto_kx_SEEDBYTES' bytes")
+
+  crypto_generichash(sk, seed)
+  return crypto_scalarmult_base(pk, sk)
+}
+
+module.exports = {
+  crypto_kx_keypair,
+  crypto_kx_seed_keypair,
+  crypto_kx_SEEDBYTES,
+  crypto_kx_SECRETKEYBYTES,
+  crypto_kx_PUBLICKEYBYTES
+}

crypto_onetimeauth.js

@@ -0,0 +1,36 @@
+/* eslint-disable camelcase */
+const assert = require('nanoassert')
+const Poly1305 = require('./internal/poly1305')
+const { crypto_verify_16 } = require('./crypto_verify')
+
+const crypto_onetimeauth_BYTES = 16
+const crypto_onetimeauth_KEYBYTES = 32
+const crypto_onetimeauth_PRIMITIVE = 'poly1305'
+
+module.exports = {
+  crypto_onetimeauth,
+  crypto_onetimeauth_verify,
+  crypto_onetimeauth_BYTES,
+  crypto_onetimeauth_KEYBYTES,
+  crypto_onetimeauth_PRIMITIVE
+}
+
+function crypto_onetimeauth (mac, msg, key) {
+  assert(mac.byteLength === crypto_onetimeauth_BYTES, "mac must be 'crypto_onetimeauth_BYTES' bytes")
+  assert(msg.byteLength != null, 'msg must be buffer')
+  assert(key.byteLength === crypto_onetimeauth_KEYBYTES, "key must be 'crypto_onetimeauth_KEYBYTES' bytes")
+
+  var s = new Poly1305(key)
+  s.update(msg, 0, msg.byteLength)
+  s.finish(mac, 0)
+}
+
+function crypto_onetimeauth_verify (mac, msg, key) {
+  assert(mac.byteLength === crypto_onetimeauth_BYTES, "mac must be 'crypto_onetimeauth_BYTES' bytes")
+  assert(msg.byteLength != null, 'msg must be buffer')
+  assert(key.byteLength === crypto_onetimeauth_KEYBYTES, "key must be 'crypto_onetimeauth_KEYBYTES' bytes")
+
+  var tmp = new Uint8Array(16)
+  crypto_onetimeauth(tmp, msg, key)
+  return crypto_verify_16(mac, 0, tmp, 0)
+}

crypto_scalarmult.js

@@ -0,0 +1,76 @@
+/* eslint-disable camelcase, one-var */
+const { _9, _121665, gf, inv25519, pack25519, unpack25519, sel25519, A, M, Z, S } = require('./internal/ed25519')
+
+const crypto_scalarmult_BYTES = 32
+const crypto_scalarmult_SCALARBYTES = 32
+
+module.exports = {
+  crypto_scalarmult,
+  crypto_scalarmult_base,
+  crypto_scalarmult_BYTES,
+  crypto_scalarmult_SCALARBYTES
+}
+
+function crypto_scalarmult (q, n, p) {
+  check(q, crypto_scalarmult_BYTES)
+  check(n, crypto_scalarmult_SCALARBYTES)
+  check(p, crypto_scalarmult_BYTES)
+  var z = new Uint8Array(32)
+  var x = new Float64Array(80), r, i
+  var a = gf(), b = gf(), c = gf(),
+    d = gf(), e = gf(), f = gf()
+  for (i = 0; i < 31; i++) z[i] = n[i]
+  z[31] = (n[31] & 127) | 64
+  z[0] &= 248
+  unpack25519(x, p)
+  for (i = 0; i < 16; i++) {
+    b[i] = x[i]
+    d[i] = a[i] = c[i] = 0
+  }
+  a[0] = d[0] = 1
+  for (i = 254; i >= 0; --i) {
+    r = (z[i >>> 3] >>> (i & 7)) & 1
+    sel25519(a, b, r)
+    sel25519(c, d, r)
+    A(e, a, c)
+    Z(a, a, c)
+    A(c, b, d)
+    Z(b, b, d)
+    S(d, e)
+    S(f, a)
+    M(a, c, a)
+    M(c, b, e)
+    A(e, a, c)
+    Z(a, a, c)
+    S(b, a)
+    Z(c, d, f)
+    M(a, c, _121665)
+    A(a, a, d)
+    M(c, c, a)
+    M(a, d, f)
+    M(d, b, x)
+    S(b, e)
+    sel25519(a, b, r)
+    sel25519(c, d, r)
+  }
+  for (i = 0; i < 16; i++) {
+    x[i + 16] = a[i]
+    x[i + 32] = c[i]
+    x[i + 48] = b[i]
+    x[i + 64] = d[i]
+  }
+  var x32 = x.subarray(32)
+  var x16 = x.subarray(16)
+  inv25519(x32, x32)
+  M(x16, x16, x32)
+  pack25519(q, x16)
+  return 0
+}
+
+function crypto_scalarmult_base (q, n) {
+  return crypto_scalarmult(q, n, _9)
+}
+
+function check (buf, len) {
+  if (!buf || (len && buf.length < len)) throw new Error('Argument must be a buffer' + (len ? ' of length ' + len : ''))
+}

crypto_secretbox.js

@@ -0,0 +1,111 @@
+/* eslint-disable camelcase */
+const assert = require('nanoassert')
+const { crypto_stream, crypto_stream_xor } = require('./crypto_stream')
+const { crypto_onetimeauth, crypto_onetimeauth_verify, crypto_onetimeauth_BYTES, crypto_onetimeauth_KEYBYTES } = require('./crypto_onetimeauth')
+
+const crypto_secretbox_KEYBYTES = 32
+const crypto_secretbox_NONCEBYTES = 24
+const crypto_secretbox_ZEROBYTES = 32
+const crypto_secretbox_BOXZEROBYTES = 16
+const crypto_secretbox_MACBYTES = 16
+
+module.exports = {
+  crypto_secretbox,
+  crypto_secretbox_open,
+  crypto_secretbox_detached,
+  crypto_secretbox_open_detached,
+  crypto_secretbox_easy,
+  crypto_secretbox_open_easy,
+  crypto_secretbox_KEYBYTES,
+  crypto_secretbox_NONCEBYTES,
+  crypto_secretbox_ZEROBYTES,
+  crypto_secretbox_BOXZEROBYTES,
+  crypto_secretbox_MACBYTES
+}
+
+function crypto_secretbox (c, m, n, k) {
+  assert(c.byteLength === m.byteLength, "c must be 'm.byteLength' bytes")
+  const mlen = m.byteLength
+  assert(mlen >= crypto_secretbox_ZEROBYTES, "mlen must be at least 'crypto_secretbox_ZEROBYTES'")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  crypto_stream_xor(c, m, n, k)
+  crypto_onetimeauth(
+    c.subarray(crypto_secretbox_BOXZEROBYTES, crypto_secretbox_BOXZEROBYTES + crypto_onetimeauth_BYTES),
+    c.subarray(crypto_secretbox_BOXZEROBYTES + crypto_onetimeauth_BYTES, c.byteLength),
+    c.subarray(0, crypto_onetimeauth_KEYBYTES)
+  )
+  c.fill(0, 0, crypto_secretbox_BOXZEROBYTES)
+}
+
+function crypto_secretbox_open (m, c, n, k) {
+  assert(c.byteLength === m.byteLength, "c must be 'm.byteLength' bytes")
+  const mlen = m.byteLength
+  assert(mlen >= crypto_secretbox_ZEROBYTES, "mlen must be at least 'crypto_secretbox_ZEROBYTES'")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  const x = new Uint8Array(crypto_onetimeauth_KEYBYTES)
+  crypto_stream(x, n, k)
+  const validMac = crypto_onetimeauth_verify(
+    c.subarray(crypto_secretbox_BOXZEROBYTES, crypto_secretbox_BOXZEROBYTES + crypto_onetimeauth_BYTES),
+    c.subarray(crypto_secretbox_BOXZEROBYTES + crypto_onetimeauth_BYTES, c.byteLength),
+    x
+  )
+
+  if (validMac === false) return false
+  crypto_stream_xor(m, c, n, k)
+  m.fill(0, 0, 32)
+  return true
+}
+
+function crypto_secretbox_detached (o, mac, msg, n, k) {
+  assert(o.byteLength === msg.byteLength, "o must be 'msg.byteLength' bytes")
+  assert(mac.byteLength === crypto_secretbox_MACBYTES, "mac must be 'crypto_secretbox_MACBYTES' bytes")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  const tmp = new Uint8Array(msg.byteLength + mac.byteLength)
+  crypto_secretbox_easy(tmp, msg, n, k)
+  mac.set(tmp.subarray(0, mac.byteLength))
+  o.set(tmp.subarray(mac.byteLength))
+  return true
+}
+
+function crypto_secretbox_open_detached (msg, o, mac, n, k) {
+  assert(o.byteLength === msg.byteLength, "o must be 'msg.byteLength' bytes")
+  assert(mac.byteLength === crypto_secretbox_MACBYTES, "mac must be 'crypto_secretbox_MACBYTES' bytes")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  const tmp = new Uint8Array(o.byteLength + mac.byteLength)
+  tmp.set(mac)
+  tmp.set(o, mac.byteLength)
+  return crypto_secretbox_open_easy(msg, tmp, n, k)
+}
+
+function crypto_secretbox_easy (o, msg, n, k) {
+  assert(o.byteLength === msg.byteLength + crypto_secretbox_MACBYTES, "o must be 'msg.byteLength + crypto_secretbox_MACBYTES' bytes")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  const m = new Uint8Array(crypto_secretbox_ZEROBYTES + msg.byteLength)
+  const c = new Uint8Array(m.byteLength)
+  m.set(msg, crypto_secretbox_ZEROBYTES)
+  crypto_secretbox(c, m, n, k)
+  o.set(c.subarray(crypto_secretbox_BOXZEROBYTES))
+}
+
+function crypto_secretbox_open_easy (msg, box, n, k) {
+  assert(box.byteLength === msg.byteLength + crypto_secretbox_MACBYTES, "box must be 'msg.byteLength + crypto_secretbox_MACBYTES' bytes")
+  assert(n.byteLength === crypto_secretbox_NONCEBYTES, "n must be 'crypto_secretbox_NONCEBYTES' bytes")
+  assert(k.byteLength === crypto_secretbox_KEYBYTES, "k must be 'crypto_secretbox_KEYBYTES' bytes")
+
+  const c = new Uint8Array(crypto_secretbox_BOXZEROBYTES + box.byteLength)
+  const m = new Uint8Array(c.byteLength)
+  c.set(box, crypto_secretbox_BOXZEROBYTES)
+  if (crypto_secretbox_open(m, c, n, k) === false) return false
+  msg.set(m.subarray(crypto_secretbox_ZEROBYTES))
+  return true
+}

crypto_shorthash.js

@@ -0,0 +1,14 @@
+var siphash = require('siphash24')
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+exports.crypto_shorthash_PRIMITIVE = 'siphash24'
+exports.crypto_shorthash_BYTES = siphash.BYTES
+exports.crypto_shorthash_KEYBYTES = siphash.KEYBYTES
+exports.crypto_shorthash_WASM_SUPPORTED = siphash.WASM_SUPPORTED
+exports.crypto_shorthash_WASM_LOADED = siphash.WASM_LOADED
+exports.crypto_shorthash = shorthash
+
+function shorthash (out, data, key, noAssert) {
+  siphash(data, key, out, noAssert)
+}

crypto_sign.js

@@ -0,0 +1,469 @@
+/* eslint-disable camelcase, one-var */
+const { crypto_verify_32 } = require('./crypto_verify')
+const { crypto_hash } = require('./crypto_hash')
+const {
+  gf, gf0, gf1, D, D2,
+  X, Y, I, A, Z, M, S,
+  sel25519, pack25519,
+  inv25519, unpack25519
+} = require('./internal/ed25519')
+const { randombytes } = require('./randombytes')
+const { crypto_scalarmult_BYTES } = require('./crypto_scalarmult.js')
+const { crypto_hash_sha512_BYTES } = require('./crypto_hash.js')
+const assert = require('nanoassert')
+
+const crypto_sign_ed25519_PUBLICKEYBYTES = 32
+const crypto_sign_ed25519_SECRETKEYBYTES = 64
+const crypto_sign_ed25519_SEEDBYTES = 32
+const crypto_sign_ed25519_BYTES = 64
+
+const crypto_sign_BYTES = crypto_sign_ed25519_BYTES
+const crypto_sign_PUBLICKEYBYTES = crypto_sign_ed25519_PUBLICKEYBYTES
+const crypto_sign_SECRETKEYBYTES = crypto_sign_ed25519_SECRETKEYBYTES
+const crypto_sign_SEEDBYTES = crypto_sign_ed25519_SEEDBYTES
+
+module.exports = {
+  crypto_sign_keypair,
+  crypto_sign_seed_keypair,
+  crypto_sign,
+  crypto_sign_detached,
+  crypto_sign_open,
+  crypto_sign_verify_detached,
+  crypto_sign_BYTES,
+  crypto_sign_PUBLICKEYBYTES,
+  crypto_sign_SECRETKEYBYTES,
+  crypto_sign_SEEDBYTES,
+  crypto_sign_ed25519_PUBLICKEYBYTES,
+  crypto_sign_ed25519_SECRETKEYBYTES,
+  crypto_sign_ed25519_SEEDBYTES,
+  crypto_sign_ed25519_BYTES,
+  crypto_sign_ed25519_pk_to_curve25519,
+  crypto_sign_ed25519_sk_to_curve25519,
+  crypto_sign_ed25519_sk_to_pk,
+  unpackneg,
+  pack
+}
+
+function set25519 (r, a) {
+  for (let i = 0; i < 16; i++) r[i] = a[i] | 0
+}
+
+function pow2523 (o, i) {
+  var c = gf()
+  var a
+  for (a = 0; a < 16; a++) c[a] = i[a]
+  for (a = 250; a >= 0; a--) {
+    S(c, c)
+    if (a !== 1) M(c, c, i)
+  }
+  for (a = 0; a < 16; a++) o[a] = c[a]
+}
+
+function add (p, q) {
+  var a = gf(), b = gf(), c = gf(),
+    d = gf(), e = gf(), f = gf(),
+    g = gf(), h = gf(), t = gf()
+
+  Z(a, p[1], p[0])
+  Z(t, q[1], q[0])
+  M(a, a, t)
+  A(b, p[0], p[1])
+  A(t, q[0], q[1])
+  M(b, b, t)
+  M(c, p[3], q[3])
+  M(c, c, D2)
+  M(d, p[2], q[2])
+  A(d, d, d)
+  Z(e, b, a)
+  Z(f, d, c)
+  A(g, d, c)
+  A(h, b, a)
+
+  M(p[0], e, f)
+  M(p[1], h, g)
+  M(p[2], g, f)
+  M(p[3], e, h)
+}
+
+function cswap (p, q, b) {
+  var i
+  for (i = 0; i < 4; i++) {
+    sel25519(p[i], q[i], b)
+  }
+}
+
+function pack (r, p) {
+  var tx = gf(), ty = gf(), zi = gf()
+  inv25519(zi, p[2])
+  M(tx, p[0], zi)
+  M(ty, p[1], zi)
+  pack25519(r, ty)
+  r[31] ^= par25519(tx) << 7
+}
+
+function scalarmult (p, q, s) {
+  // don't mutate q
+  var h = [gf(q[0]), gf(q[1]), gf(q[2]), gf(q[3])]
+  var b, i
+  set25519(p[0], gf0)
+  set25519(p[1], gf1)
+  set25519(p[2], gf1)
+  set25519(p[3], gf0)
+  for (i = 255; i >= 0; --i) {
+    b = (s[(i / 8) | 0] >> (i & 7)) & 1
+    cswap(p, h, b)
+    add(h, p)
+    add(p, p)
+    cswap(p, h, b)
+  }
+}
+
+function scalarbase (p, s) {
+  var q = [gf(), gf(), gf(), gf()]
+  set25519(q[0], X)
+  set25519(q[1], Y)
+  set25519(q[2], gf1)
+  M(q[3], X, Y)
+  scalarmult(p, q, s)
+}
+
+function crypto_sign_keypair (pk, sk, seeded) {
+  check(pk, crypto_sign_PUBLICKEYBYTES)
+  check(sk, crypto_sign_SECRETKEYBYTES)
+
+  var d = new Uint8Array(64)
+  var p = [gf(), gf(), gf(), gf()]
+  var i
+
+  if (!seeded) randombytes(sk, 32)
+  crypto_hash(d, sk, 32)
+  d[0] &= 248
+  d[31] &= 127
+  d[31] |= 64
+
+  scalarbase(p, d)
+  pack(pk, p)
+
+  for (i = 0; i < 32; i++) sk[i + 32] = pk[i]
+}
+
+function crypto_sign_seed_keypair (pk, sk, seed) {
+  check(seed, crypto_sign_SEEDBYTES)
+  sk.set(seed)
+  return crypto_sign_keypair(pk, sk, true)
+}
+
+var L = new Float64Array([0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x10])
+
+function modL (r, x) {
+  var carry, i, j, k
+  for (i = 63; i >= 32; --i) {
+    carry = 0
+    for (j = i - 32, k = i - 12; j < k; ++j) {
+      x[j] += carry - 16 * x[i] * L[j - (i - 32)]
+      carry = (x[j] + 128) >> 8
+      x[j] -= carry * 256
+    }
+    x[j] += carry
+    x[i] = 0
+  }
+  carry = 0
+  for (j = 0; j < 32; j++) {
+    x[j] += carry - (x[31] >> 4) * L[j]
+    carry = x[j] >> 8
+    x[j] &= 255
+  }
+  for (j = 0; j < 32; j++) x[j] -= carry * L[j]
+  for (i = 0; i < 32; i++) {
+    x[i + 1] += x[i] >> 8
+    r[i] = x[i] & 255
+  }
+}
+
+function reduce (r) {
+  var x = new Float64Array(64)
+  for (let i = 0; i < 64; i++) x[i] = r[i]
+  for (let i = 0; i < 64; i++) r[i] = 0
+  modL(r, x)
+}
+
+// Note: difference from C - smlen returned, not passed as argument.
+function crypto_sign (sm, m, sk) {
+  check(sm, crypto_sign_BYTES + m.length)
+  check(m, 0)
+  check(sk, crypto_sign_SECRETKEYBYTES)
+  var n = m.length
+
+  var d = new Uint8Array(64), h = new Uint8Array(64), r = new Uint8Array(64)
+  var i, j, x = new Float64Array(64)
+  var p = [gf(), gf(), gf(), gf()]
+
+  crypto_hash(d, sk, 32)
+  d[0] &= 248
+  d[31] &= 127
+  d[31] |= 64
+
+  var smlen = n + 64
+  for (i = 0; i < n; i++) sm[64 + i] = m[i]
+  for (i = 0; i < 32; i++) sm[32 + i] = d[32 + i]
+
+  crypto_hash(r, sm.subarray(32), n + 32)
+  reduce(r)
+  scalarbase(p, r)
+  pack(sm, p)
+
+  for (i = 32; i < 64; i++) sm[i] = sk[i]
+  crypto_hash(h, sm, n + 64)
+  reduce(h)
+
+  for (i = 0; i < 64; i++) x[i] = 0
+  for (i = 0; i < 32; i++) x[i] = r[i]
+  for (i = 0; i < 32; i++) {
+    for (j = 0; j < 32; j++) {
+      x[i + j] += h[i] * d[j]
+    }
+  }
+
+  modL(sm.subarray(32), x)
+  return smlen
+}
+
+function crypto_sign_detached (sig, m, sk) {
+  var sm = new Uint8Array(m.length + crypto_sign_BYTES)
+  crypto_sign(sm, m, sk)
+  for (let i = 0; i < crypto_sign_BYTES; i++) sig[i] = sm[i]
+}
+
+function unpackneg (r, p) {
+  var t = gf(), chk = gf(), num = gf(),
+    den = gf(), den2 = gf(), den4 = gf(),
+    den6 = gf()
+
+  set25519(r[2], gf1)
+  unpack25519(r[1], p)
+  S(num, r[1])
+  M(den, num, D)
+  Z(num, num, r[2])
+  A(den, r[2], den)
+
+  S(den2, den)
+  S(den4, den2)
+  M(den6, den4, den2)
+  M(t, den6, num)
+  M(t, t, den)
+
+  pow2523(t, t)
+  M(t, t, num)
+  M(t, t, den)
+  M(t, t, den)
+  M(r[0], t, den)
+
+  S(chk, r[0])
+  M(chk, chk, den)
+  if (!neq25519(chk, num)) M(r[0], r[0], I)
+
+  S(chk, r[0])
+  M(chk, chk, den)
+  if (!neq25519(chk, num)) return false
+
+  if (par25519(r[0]) === (p[31] >> 7)) {
+    Z(r[0], gf(), r[0])
+  }
+
+  M(r[3], r[0], r[1])
+  return true
+}
+
+/* eslint-disable no-unused-vars */
+function crypto_sign_open (msg, sm, pk) {
+  check(msg, sm.length - crypto_sign_BYTES)
+  check(sm, crypto_sign_BYTES)
+  check(pk, crypto_sign_PUBLICKEYBYTES)
+  var n = sm.length
+  var m = new Uint8Array(sm.length)
+
+  var i, mlen
+  var t = new Uint8Array(32), h = new Uint8Array(64)
+  var p = [gf(), gf(), gf(), gf()],
+    q = [gf(), gf(), gf(), gf()]
+
+  mlen = -1
+  if (n < 64) return false
+
+  if (!unpackneg(q, pk)) return false
+
+  for (i = 0; i < n; i++) m[i] = sm[i]
+  for (i = 0; i < 32; i++) m[i + 32] = pk[i]
+  crypto_hash(h, m, n)
+  reduce(h)
+  scalarmult(p, q, h)
+
+  scalarbase(q, sm.subarray(32))
+  add(p, q)
+  pack(t, p)
+
+  n -= 64
+  if (!crypto_verify_32(sm, 0, t, 0)) {
+    for (i = 0; i < n; i++) m[i] = 0
+    return false
+    // throw new Error('crypto_sign_open failed')
+  }
+
+  for (i = 0; i < n; i++) msg[i] = sm[i + 64]
+  mlen = n
+  return true
+}
+/* eslint-enable no-unused-vars */
+
+function crypto_sign_verify_detached (sig, m, pk) {
+  check(sig, crypto_sign_BYTES)
+  var sm = new Uint8Array(m.length + crypto_sign_BYTES)
+  var i = 0
+  for (i = 0; i < crypto_sign_BYTES; i++) sm[i] = sig[i]
+  for (i = 0; i < m.length; i++) sm[i + crypto_sign_BYTES] = m[i]
+  return crypto_sign_open(m, sm, pk)
+}
+
+function par25519 (a) {
+  var d = new Uint8Array(32)
+  pack25519(d, a)
+  return d[0] & 1
+}
+
+function neq25519 (a, b) {
+  var c = new Uint8Array(32), d = new Uint8Array(32)
+  pack25519(c, a)
+  pack25519(d, b)
+  return crypto_verify_32(c, 0, d, 0)
+}
+
+function ed25519_mul_l (p, q) {
+  scalarmult(p, q, L)
+}
+
+function ed25519_is_on_main_subgroup (p) {
+  var pl = [gf(), gf(), gf(), gf()]
+
+  ed25519_mul_l(pl, p)
+
+  var zero = 0
+  for (let i = 0; i < 16; i++) {
+    zero |= (pl[0][i] & 0xffff)
+  }
+
+  return zero === 0
+}
+
+function crypto_sign_ed25519_pk_to_curve25519 (x25519_pk, ed25519_pk) {
+  check(x25519_pk, crypto_sign_PUBLICKEYBYTES)
+  check(ed25519_pk, crypto_sign_ed25519_PUBLICKEYBYTES)
+
+  var a = [gf(), gf(), gf(), gf()]
+  var x = gf([1])
+  var one_minus_y = gf([1])
+
+  assert(
+    isSmallOrder(ed25519_pk) &&
+    unpackneg(a, ed25519_pk) &&
+    ed25519_is_on_main_subgroup(a), 'Cannot convert key: bad point')
+
+  for (let i = 0; i < a.length; i++) {
+    pack25519(x25519_pk, a[i])
+  }
+
+  Z(one_minus_y, one_minus_y, a[1])
+  A(x, x, a[1])
+  inv25519(one_minus_y, one_minus_y)
+  M(x, x, one_minus_y)
+  pack25519(x25519_pk, x)
+
+  return 0
+}
+
+function isSmallOrder (s) {
+  Uint8Array.from([])
+
+  var bad_points = [
+    // 0 (order 4)
+    Uint8Array.from([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
+
+    // 1 (order 1)
+    Uint8Array.from([0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
+
+    // 2707385501144840649318225287225658788936804267575313519463743609750303402022(order 8)
+    Uint8Array.from([0x26, 0xe8, 0x95, 0x8f, 0xc2, 0xb2, 0x27, 0xb0, 0x45, 0xc3,
+      0xf4, 0x89, 0xf2, 0xef, 0x98, 0xf0, 0xd5, 0xdf, 0xac, 0x05, 0xd3,
+      0xc6, 0x33, 0x39, 0xb1, 0x38, 0x02, 0x88, 0x6d, 0x53, 0xfc, 0x05]),
+
+    // 55188659117513257062467267217118295137698188065244968500265048394206261417927 (order 8)
+    Uint8Array.from([0xc7, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f, 0xba, 0x3c,
+      0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f, 0x2a, 0x20, 0x53, 0xfa, 0x2c,
+      0x39, 0xcc, 0xc6, 0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0x7a]),
+
+    // p-1 (order 2)
+    Uint8Array.from([0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f]),
+
+    //  p (=0 order 4)
+    Uint8Array.from([0xed, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f]),
+
+    // p + 1 (=1 order 1)
+    Uint8Array.from([0xee, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f])
+  ]
+
+  var c = new Uint8Array(7)
+  var j
+
+  check(bad_points, 7)
+  for (let i = 0; i < bad_points.length; i++) {
+    for (j = 0; j < 31; j++) {
+      c[i] |= s[j] ^ bad_points[i][j]
+    }
+  }
+
+  for (let i = 0; i < bad_points.length; i++) {
+    c[i] |= (s[j] & 0x7f) ^ bad_points[i][j]
+  }
+
+  var k = 0
+  for (let i = 0; i < bad_points.length; i++) {
+    k |= (c[i] - 1)
+  }
+
+  return ((k >> 8) & 1) === 0
+}
+
+function crypto_sign_ed25519_sk_to_pk (pk, sk) {
+  check(pk, crypto_sign_ed25519_PUBLICKEYBYTES)
+  pk.set(sk.subarray(crypto_sign_ed25519_SEEDBYTES))
+  return pk
+}
+
+function crypto_sign_ed25519_sk_to_curve25519 (curveSk, edSk) {
+  assert(curveSk && curveSk.byteLength === crypto_scalarmult_BYTES, "curveSk must be 'crypto_sign_SECRETKEYBYTES' long")
+  assert(edSk && edSk.byteLength === crypto_sign_ed25519_SECRETKEYBYTES, "edSk must be 'crypto_sign_ed25519_SECRETKEYBYTES' long")
+
+  var h = Buffer.alloc(crypto_hash_sha512_BYTES)
+  crypto_hash(h, edSk, 32)
+
+  h[0] &= 248
+  h[31] &= 127
+  h[31] |= 64
+
+  curveSk.set(h.subarray(0, crypto_scalarmult_BYTES))
+  h.fill(0)
+  return curveSk
+}
+
+function check (buf, len, arg = 'Argument') {
+  if (!buf || (len && buf.length < len)) throw new Error(arg + ' must be a buffer' + (len ? ' of length ' + len : ''))
+}

crypto_stream.js

@@ -0,0 +1,38 @@
+/* eslint-disable camelcase */
+const xsalsa20 = require('xsalsa20')
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+exports.crypto_stream_KEYBYTES = 32
+exports.crypto_stream_NONCEBYTES = 24
+exports.crypto_stream_PRIMITIVE = 'xsalsa20'
+exports.crypto_stream_xsalsa20_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
+
+exports.crypto_stream = function (c, nonce, key) {
+  c.fill(0)
+  exports.crypto_stream_xor(c, c, nonce, key)
+}
+
+exports.crypto_stream_xor = function (c, m, nonce, key) {
+  const xor = xsalsa20(nonce, key)
+
+  xor.update(m, c)
+  xor.final()
+}
+
+exports.crypto_stream_xor_instance = function (nonce, key) {
+  return new XOR(nonce, key)
+}
+
+function XOR (nonce, key) {
+  this._instance = xsalsa20(nonce, key)
+}
+
+XOR.prototype.update = function (out, inp) {
+  this._instance.update(inp, out)
+}
+
+XOR.prototype.final = function () {
+  this._instance.finalize()
+  this._instance = null
+}

crypto_stream_chacha20.js

@@ -0,0 +1,84 @@
+const assert = require('nanoassert')
+const Chacha20 = require('chacha20-universal')
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+exports.crypto_stream_chacha20_KEYBYTES = 32
+exports.crypto_stream_chacha20_NONCEBYTES = 8
+exports.crypto_stream_chacha20_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
+
+exports.crypto_stream_chacha20_ietf_KEYBYTES = 32
+exports.crypto_stream_chacha20_ietf_NONCEBYTES = 12
+exports.crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX = 2 ** 32
+
+exports.crypto_stream_chacha20 = function (c, n, k) {
+  c.fill(0)
+  exports.crypto_stream_chacha20_xor(c, c, n, k)
+}
+
+exports.crypto_stream_chacha20_xor = function (c, m, n, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
+    'n should be crypto_stream_chacha20_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
+    'k should be crypto_stream_chacha20_KEYBYTES')
+
+  const xor = new Chacha20(n, k)
+  xor.update(c, m)
+  xor.final()
+}
+
+exports.crypto_stream_chacha20_xor_ic = function (c, m, n, ic, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
+    'n should be crypto_stream_chacha20_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
+    'k should be crypto_stream_chacha20_KEYBYTES')
+
+  const xor = new Chacha20(n, k, ic)
+  xor.update(c, m)
+  xor.final()
+}
+
+exports.crypto_stream_chacha20_xor_instance = function (n, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
+    'n should be crypto_stream_chacha20_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
+    'k should be crypto_stream_chacha20_KEYBYTES')
+
+  return new Chacha20(n, k)
+}
+
+exports.crypto_stream_chacha20_ietf = function (c, n, k) {
+  c.fill(0)
+  exports.crypto_stream_chacha20_ietf_xor(c, c, n, k)
+}
+
+exports.crypto_stream_chacha20_ietf_xor = function (c, m, n, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
+    'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
+    'k should be crypto_stream_chacha20_ietf_KEYBYTES')
+
+  const xor = new Chacha20(n, k)
+  xor.update(c, m)
+  xor.final()
+}
+
+exports.crypto_stream_chacha20_ietf_xor_ic = function (c, m, n, ic, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
+    'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
+    'k should be crypto_stream_chacha20_ietf_KEYBYTES')
+
+  const xor = new Chacha20(n, k, ic)
+  xor.update(c, m)
+  xor.final()
+}
+
+exports.crypto_stream_chacha20_ietf_xor_instance = function (n, k) {
+  assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
+    'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
+  assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
+    'k should be crypto_stream_chacha20_ietf_KEYBYTES')
+
+  return new Chacha20(n, k)
+}

crypto_verify.js

@@ -0,0 +1,29 @@
+/* eslint-disable camelcase */
+module.exports = {
+  crypto_verify_16,
+  crypto_verify_32,
+  crypto_verify_64
+}
+
+function vn (x, xi, y, yi, n) {
+  var d = 0
+  for (let i = 0; i < n; i++) d |= x[xi + i] ^ y[yi + i]
+  return (1 & ((d - 1) >>> 8)) - 1
+}
+
+// Make non enumerable as this is an internal function
+Object.defineProperty(module.exports, 'vn', {
+  value: vn
+})
+
+function crypto_verify_16 (x, xi, y, yi) {
+  return vn(x, xi, y, yi, 16) === 0
+}
+
+function crypto_verify_32 (x, xi, y, yi) {
+  return vn(x, xi, y, yi, 32) === 0
+}
+
+function crypto_verify_64 (x, xi, y, yi) {
+  return vn(x, xi, y, yi, 64) === 0
+}

example.js

@@ -1,20 +1,22 @@
-var sodium = require('./')
+const sodium = require('./')
 
-var key = new Buffer(sodium.crypto_secretbox_KEYBYTES)
-var nonce = new Buffer(sodium.crypto_secretbox_NONCEBYTES)
+const key = Buffer.alloc(sodium.crypto_secretbox_KEYBYTES)
+const nonce = Buffer.alloc(sodium.crypto_secretbox_NONCEBYTES)
 
 sodium.randombytes_buf(key)
 sodium.randombytes_buf(nonce)
 
-var message = new Buffer('Hello, World!')
-var cipher = new Buffer(message.length + sodium.crypto_secretbox_MACBYTES)
+const message = Buffer.from('Hello, World!')
+const cipher = Buffer.alloc(message.length + sodium.crypto_secretbox_MACBYTES)
 
 sodium.crypto_secretbox_easy(cipher, message, nonce, key)
 
 console.log('Encrypted:', cipher)
 
-var plainText = new Buffer(cipher.length - sodium.crypto_secretbox_MACBYTES)
+const plainText = Buffer.alloc(cipher.length - sodium.crypto_secretbox_MACBYTES)
 
 sodium.crypto_secretbox_open_easy(plainText, cipher, nonce, key)
 
 console.log('Plaintext:', plainText.toString())
+
+if (typeof window !== 'undefined') window.close()

helpers.js

@@ -0,0 +1,31 @@
+/* eslint-disable camelcase */
+const assert = require('nanoassert')
+const { vn } = require('./crypto_verify')
+
+function sodium_increment (n) {
+  const nlen = n.byteLength
+  var c = 1
+  for (var i = 0; i < nlen; i++) {
+    c += n[i]
+    n[i] = c
+    c >>= 8
+  }
+}
+
+function sodium_memcmp (a, b) {
+  assert(a.byteLength === b.byteLength, 'buffers must be the same size')
+
+  return vn(a, 0, b, 0, a.byteLength) === 0
+}
+
+function sodium_is_zero (arr) {
+  var d = 0
+  for (let i = 0; i < arr.length; i++) d |= arr[i]
+  return d === 0
+}
+
+module.exports = {
+  sodium_increment,
+  sodium_memcmp,
+  sodium_is_zero
+}

internal/ed25519.js

@@ -0,0 +1,483 @@
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+var gf = function(init) {
+  var i, r = new Float64Array(16);
+  if (init) for (i = 0; i < init.length; i++) r[i] = init[i];
+  return r;
+}
+
+var _0 = new Uint8Array(16);
+var _9 = new Uint8Array(32); _9[0] = 9;
+
+var gf0 = gf(),
+    gf1 = gf([1]),
+    _121665 = gf([0xdb41, 1]),
+    D = gf([0x78a3, 0x1359, 0x4dca, 0x75eb, 0xd8ab, 0x4141, 0x0a4d, 0x0070, 0xe898, 0x7779, 0x4079, 0x8cc7, 0xfe73, 0x2b6f, 0x6cee, 0x5203]),
+    D2 = gf([0xf159, 0x26b2, 0x9b94, 0xebd6, 0xb156, 0x8283, 0x149a, 0x00e0, 0xd130, 0xeef3, 0x80f2, 0x198e, 0xfce7, 0x56df, 0xd9dc, 0x2406]),
+    X = gf([0xd51a, 0x8f25, 0x2d60, 0xc956, 0xa7b2, 0x9525, 0xc760, 0x692c, 0xdc5c, 0xfdd6, 0xe231, 0xc0a4, 0x53fe, 0xcd6e, 0x36d3, 0x2169]),
+    Y = gf([0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666]),
+    I = gf([0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83]);
+
+function A(o, a, b) {
+  for (var i = 0; i < 16; i++) o[i] = a[i] + b[i];
+}
+
+function Z(o, a, b) {
+  for (var i = 0; i < 16; i++) o[i] = a[i] - b[i];
+}
+
+function M(o, a, b) {
+  var v, c,
+    t0 = 0,  t1 = 0,  t2 = 0,  t3 = 0,  t4 = 0,  t5 = 0,  t6 = 0,  t7 = 0,
+    t8 = 0,  t9 = 0, t10 = 0, t11 = 0, t12 = 0, t13 = 0, t14 = 0, t15 = 0,
+    t16 = 0, t17 = 0, t18 = 0, t19 = 0, t20 = 0, t21 = 0, t22 = 0, t23 = 0,
+    t24 = 0, t25 = 0, t26 = 0, t27 = 0, t28 = 0, t29 = 0, t30 = 0,
+    b0 = b[0],
+    b1 = b[1],
+    b2 = b[2],
+    b3 = b[3],
+    b4 = b[4],
+    b5 = b[5],
+    b6 = b[6],
+    b7 = b[7],
+    b8 = b[8],
+    b9 = b[9],
+    b10 = b[10],
+    b11 = b[11],
+    b12 = b[12],
+    b13 = b[13],
+    b14 = b[14],
+    b15 = b[15];
+
+  v = a[0];
+  t0 += v * b0;
+  t1 += v * b1;
+  t2 += v * b2;
+  t3 += v * b3;
+  t4 += v * b4;
+  t5 += v * b5;
+  t6 += v * b6;
+  t7 += v * b7;
+  t8 += v * b8;
+  t9 += v * b9;
+  t10 += v * b10;
+  t11 += v * b11;
+  t12 += v * b12;
+  t13 += v * b13;
+  t14 += v * b14;
+  t15 += v * b15;
+  v = a[1];
+  t1 += v * b0;
+  t2 += v * b1;
+  t3 += v * b2;
+  t4 += v * b3;
+  t5 += v * b4;
+  t6 += v * b5;
+  t7 += v * b6;
+  t8 += v * b7;
+  t9 += v * b8;
+  t10 += v * b9;
+  t11 += v * b10;
+  t12 += v * b11;
+  t13 += v * b12;
+  t14 += v * b13;
+  t15 += v * b14;
+  t16 += v * b15;
+  v = a[2];
+  t2 += v * b0;
+  t3 += v * b1;
+  t4 += v * b2;
+  t5 += v * b3;
+  t6 += v * b4;
+  t7 += v * b5;
+  t8 += v * b6;
+  t9 += v * b7;
+  t10 += v * b8;
+  t11 += v * b9;
+  t12 += v * b10;
+  t13 += v * b11;
+  t14 += v * b12;
+  t15 += v * b13;
+  t16 += v * b14;
+  t17 += v * b15;
+  v = a[3];
+  t3 += v * b0;
+  t4 += v * b1;
+  t5 += v * b2;
+  t6 += v * b3;
+  t7 += v * b4;
+  t8 += v * b5;
+  t9 += v * b6;
+  t10 += v * b7;
+  t11 += v * b8;
+  t12 += v * b9;
+  t13 += v * b10;
+  t14 += v * b11;
+  t15 += v * b12;
+  t16 += v * b13;
+  t17 += v * b14;
+  t18 += v * b15;
+  v = a[4];
+  t4 += v * b0;
+  t5 += v * b1;
+  t6 += v * b2;
+  t7 += v * b3;
+  t8 += v * b4;
+  t9 += v * b5;
+  t10 += v * b6;
+  t11 += v * b7;
+  t12 += v * b8;
+  t13 += v * b9;
+  t14 += v * b10;
+  t15 += v * b11;
+  t16 += v * b12;
+  t17 += v * b13;
+  t18 += v * b14;
+  t19 += v * b15;
+  v = a[5];
+  t5 += v * b0;
+  t6 += v * b1;
+  t7 += v * b2;
+  t8 += v * b3;
+  t9 += v * b4;
+  t10 += v * b5;
+  t11 += v * b6;
+  t12 += v * b7;
+  t13 += v * b8;
+  t14 += v * b9;
+  t15 += v * b10;
+  t16 += v * b11;
+  t17 += v * b12;
+  t18 += v * b13;
+  t19 += v * b14;
+  t20 += v * b15;
+  v = a[6];
+  t6 += v * b0;
+  t7 += v * b1;
+  t8 += v * b2;
+  t9 += v * b3;
+  t10 += v * b4;
+  t11 += v * b5;
+  t12 += v * b6;
+  t13 += v * b7;
+  t14 += v * b8;
+  t15 += v * b9;
+  t16 += v * b10;
+  t17 += v * b11;
+  t18 += v * b12;
+  t19 += v * b13;
+  t20 += v * b14;
+  t21 += v * b15;
+  v = a[7];
+  t7 += v * b0;
+  t8 += v * b1;
+  t9 += v * b2;
+  t10 += v * b3;
+  t11 += v * b4;
+  t12 += v * b5;
+  t13 += v * b6;
+  t14 += v * b7;
+  t15 += v * b8;
+  t16 += v * b9;
+  t17 += v * b10;
+  t18 += v * b11;
+  t19 += v * b12;
+  t20 += v * b13;
+  t21 += v * b14;
+  t22 += v * b15;
+  v = a[8];
+  t8 += v * b0;
+  t9 += v * b1;
+  t10 += v * b2;
+  t11 += v * b3;
+  t12 += v * b4;
+  t13 += v * b5;
+  t14 += v * b6;
+  t15 += v * b7;
+  t16 += v * b8;
+  t17 += v * b9;
+  t18 += v * b10;
+  t19 += v * b11;
+  t20 += v * b12;
+  t21 += v * b13;
+  t22 += v * b14;
+  t23 += v * b15;
+  v = a[9];
+  t9 += v * b0;
+  t10 += v * b1;
+  t11 += v * b2;
+  t12 += v * b3;
+  t13 += v * b4;
+  t14 += v * b5;
+  t15 += v * b6;
+  t16 += v * b7;
+  t17 += v * b8;
+  t18 += v * b9;
+  t19 += v * b10;
+  t20 += v * b11;
+  t21 += v * b12;
+  t22 += v * b13;
+  t23 += v * b14;
+  t24 += v * b15;
+  v = a[10];
+  t10 += v * b0;
+  t11 += v * b1;
+  t12 += v * b2;
+  t13 += v * b3;
+  t14 += v * b4;
+  t15 += v * b5;
+  t16 += v * b6;
+  t17 += v * b7;
+  t18 += v * b8;
+  t19 += v * b9;
+  t20 += v * b10;
+  t21 += v * b11;
+  t22 += v * b12;
+  t23 += v * b13;
+  t24 += v * b14;
+  t25 += v * b15;
+  v = a[11];
+  t11 += v * b0;
+  t12 += v * b1;
+  t13 += v * b2;
+  t14 += v * b3;
+  t15 += v * b4;
+  t16 += v * b5;
+  t17 += v * b6;
+  t18 += v * b7;
+  t19 += v * b8;
+  t20 += v * b9;
+  t21 += v * b10;
+  t22 += v * b11;
+  t23 += v * b12;
+  t24 += v * b13;
+  t25 += v * b14;
+  t26 += v * b15;
+  v = a[12];
+  t12 += v * b0;
+  t13 += v * b1;
+  t14 += v * b2;
+  t15 += v * b3;
+  t16 += v * b4;
+  t17 += v * b5;
+  t18 += v * b6;
+  t19 += v * b7;
+  t20 += v * b8;
+  t21 += v * b9;
+  t22 += v * b10;
+  t23 += v * b11;
+  t24 += v * b12;
+  t25 += v * b13;
+  t26 += v * b14;
+  t27 += v * b15;
+  v = a[13];
+  t13 += v * b0;
+  t14 += v * b1;
+  t15 += v * b2;
+  t16 += v * b3;
+  t17 += v * b4;
+  t18 += v * b5;
+  t19 += v * b6;
+  t20 += v * b7;
+  t21 += v * b8;
+  t22 += v * b9;
+  t23 += v * b10;
+  t24 += v * b11;
+  t25 += v * b12;
+  t26 += v * b13;
+  t27 += v * b14;
+  t28 += v * b15;
+  v = a[14];
+  t14 += v * b0;
+  t15 += v * b1;
+  t16 += v * b2;
+  t17 += v * b3;
+  t18 += v * b4;
+  t19 += v * b5;
+  t20 += v * b6;
+  t21 += v * b7;
+  t22 += v * b8;
+  t23 += v * b9;
+  t24 += v * b10;
+  t25 += v * b11;
+  t26 += v * b12;
+  t27 += v * b13;
+  t28 += v * b14;
+  t29 += v * b15;
+  v = a[15];
+  t15 += v * b0;
+  t16 += v * b1;
+  t17 += v * b2;
+  t18 += v * b3;
+  t19 += v * b4;
+  t20 += v * b5;
+  t21 += v * b6;
+  t22 += v * b7;
+  t23 += v * b8;
+  t24 += v * b9;
+  t25 += v * b10;
+  t26 += v * b11;
+  t27 += v * b12;
+  t28 += v * b13;
+  t29 += v * b14;
+  t30 += v * b15;
+
+  t0  += 38 * t16;
+  t1  += 38 * t17;
+  t2  += 38 * t18;
+  t3  += 38 * t19;
+  t4  += 38 * t20;
+  t5  += 38 * t21;
+  t6  += 38 * t22;
+  t7  += 38 * t23;
+  t8  += 38 * t24;
+  t9  += 38 * t25;
+  t10 += 38 * t26;
+  t11 += 38 * t27;
+  t12 += 38 * t28;
+  t13 += 38 * t29;
+  t14 += 38 * t30;
+  // t15 left as is
+
+  // first car
+  c = 1;
+  v =  t0 + c + 65535; c = Math.floor(v / 65536);  t0 = v - c * 65536;
+  v =  t1 + c + 65535; c = Math.floor(v / 65536);  t1 = v - c * 65536;
+  v =  t2 + c + 65535; c = Math.floor(v / 65536);  t2 = v - c * 65536;
+  v =  t3 + c + 65535; c = Math.floor(v / 65536);  t3 = v - c * 65536;
+  v =  t4 + c + 65535; c = Math.floor(v / 65536);  t4 = v - c * 65536;
+  v =  t5 + c + 65535; c = Math.floor(v / 65536);  t5 = v - c * 65536;
+  v =  t6 + c + 65535; c = Math.floor(v / 65536);  t6 = v - c * 65536;
+  v =  t7 + c + 65535; c = Math.floor(v / 65536);  t7 = v - c * 65536;
+  v =  t8 + c + 65535; c = Math.floor(v / 65536);  t8 = v - c * 65536;
+  v =  t9 + c + 65535; c = Math.floor(v / 65536);  t9 = v - c * 65536;
+  v = t10 + c + 65535; c = Math.floor(v / 65536); t10 = v - c * 65536;
+  v = t11 + c + 65535; c = Math.floor(v / 65536); t11 = v - c * 65536;
+  v = t12 + c + 65535; c = Math.floor(v / 65536); t12 = v - c * 65536;
+  v = t13 + c + 65535; c = Math.floor(v / 65536); t13 = v - c * 65536;
+  v = t14 + c + 65535; c = Math.floor(v / 65536); t14 = v - c * 65536;
+  v = t15 + c + 65535; c = Math.floor(v / 65536); t15 = v - c * 65536;
+  t0 += c-1 + 37 * (c-1);
+
+  // second car
+  c = 1;
+  v =  t0 + c + 65535; c = Math.floor(v / 65536);  t0 = v - c * 65536;
+  v =  t1 + c + 65535; c = Math.floor(v / 65536);  t1 = v - c * 65536;
+  v =  t2 + c + 65535; c = Math.floor(v / 65536);  t2 = v - c * 65536;
+  v =  t3 + c + 65535; c = Math.floor(v / 65536);  t3 = v - c * 65536;
+  v =  t4 + c + 65535; c = Math.floor(v / 65536);  t4 = v - c * 65536;
+  v =  t5 + c + 65535; c = Math.floor(v / 65536);  t5 = v - c * 65536;
+  v =  t6 + c + 65535; c = Math.floor(v / 65536);  t6 = v - c * 65536;
+  v =  t7 + c + 65535; c = Math.floor(v / 65536);  t7 = v - c * 65536;
+  v =  t8 + c + 65535; c = Math.floor(v / 65536);  t8 = v - c * 65536;
+  v =  t9 + c + 65535; c = Math.floor(v / 65536);  t9 = v - c * 65536;
+  v = t10 + c + 65535; c = Math.floor(v / 65536); t10 = v - c * 65536;
+  v = t11 + c + 65535; c = Math.floor(v / 65536); t11 = v - c * 65536;
+  v = t12 + c + 65535; c = Math.floor(v / 65536); t12 = v - c * 65536;
+  v = t13 + c + 65535; c = Math.floor(v / 65536); t13 = v - c * 65536;
+  v = t14 + c + 65535; c = Math.floor(v / 65536); t14 = v - c * 65536;
+  v = t15 + c + 65535; c = Math.floor(v / 65536); t15 = v - c * 65536;
+  t0 += c-1 + 37 * (c-1);
+
+  o[ 0] = t0;
+  o[ 1] = t1;
+  o[ 2] = t2;
+  o[ 3] = t3;
+  o[ 4] = t4;
+  o[ 5] = t5;
+  o[ 6] = t6;
+  o[ 7] = t7;
+  o[ 8] = t8;
+  o[ 9] = t9;
+  o[10] = t10;
+  o[11] = t11;
+  o[12] = t12;
+  o[13] = t13;
+  o[14] = t14;
+  o[15] = t15;
+}
+
+function S(o, a) {
+  M(o, a, a);
+}
+
+function sel25519(p, q, b) {
+  var t, c = ~(b-1);
+  for (var i = 0; i < 16; i++) {
+    t = c & (p[i] ^ q[i]);
+    p[i] ^= t;
+    q[i] ^= t;
+  }
+}
+
+function pack25519(o, n) {
+  var i, j, b;
+  var m = gf(), t = gf();
+  for (i = 0; i < 16; i++) t[i] = n[i];
+  car25519(t);
+  car25519(t);
+  car25519(t);
+  for (j = 0; j < 2; j++) {
+    m[0] = t[0] - 0xffed;
+    for (i = 1; i < 15; i++) {
+      m[i] = t[i] - 0xffff - ((m[i-1]>>16) & 1);
+      m[i-1] &= 0xffff;
+    }
+    m[15] = t[15] - 0x7fff - ((m[14]>>16) & 1);
+    b = (m[15]>>16) & 1;
+    m[14] &= 0xffff;
+    sel25519(t, m, 1-b);
+  }
+  for (i = 0; i < 16; i++) {
+    o[2*i] = t[i] & 0xff;
+    o[2*i+1] = t[i]>>8;
+  }
+}
+
+function unpack25519(o, n) {
+  var i;
+  for (i = 0; i < 16; i++) o[i] = n[2*i] + (n[2*i+1] << 8);
+  o[15] &= 0x7fff;
+}
+
+function inv25519(o, i) {
+  var c = gf();
+  var a;
+  for (a = 0; a < 16; a++) c[a] = i[a];
+  for (a = 253; a >= 0; a--) {
+    S(c, c);
+    if(a !== 2 && a !== 4) M(c, c, i);
+  }
+  for (a = 0; a < 16; a++) o[a] = c[a];
+}
+
+function car25519(o) {
+  var i, v, c = 1;
+  for (i = 0; i < 16; i++) {
+    v = o[i] + c + 65535;
+    c = Math.floor(v / 65536);
+    o[i] = v - c * 65536;
+  }
+  o[0] += c-1 + 37 * (c-1);
+}
+
+module.exports = {
+  gf,
+  A,
+  Z,
+  M,
+  S,
+  sel25519,
+  pack25519,
+  unpack25519,
+  inv25519,
+  gf0,
+  gf1,
+  _9,
+  _121665,
+  D,
+  D2,
+  X,
+  Y,
+  I
+}

internal/poly1305.js

@@ -0,0 +1,360 @@
+/*
+* Port of Andrew Moon's Poly1305-donna-16. Public domain.
+* https://github.com/floodyberry/poly1305-donna
+*/
+
+if (new Uint16Array([1])[0] !== 1) throw new Error('Big endian architecture is not supported.')
+
+var poly1305 = function(key) {
+  this.buffer = new Uint8Array(16);
+  this.r = new Uint16Array(10);
+  this.h = new Uint16Array(10);
+  this.pad = new Uint16Array(8);
+  this.leftover = 0;
+  this.fin = 0;
+
+  var t0, t1, t2, t3, t4, t5, t6, t7;
+
+  t0 = key[ 0] & 0xff | (key[ 1] & 0xff) << 8; this.r[0] = ( t0                     ) & 0x1fff;
+  t1 = key[ 2] & 0xff | (key[ 3] & 0xff) << 8; this.r[1] = ((t0 >>> 13) | (t1 <<  3)) & 0x1fff;
+  t2 = key[ 4] & 0xff | (key[ 5] & 0xff) << 8; this.r[2] = ((t1 >>> 10) | (t2 <<  6)) & 0x1f03;
+  t3 = key[ 6] & 0xff | (key[ 7] & 0xff) << 8; this.r[3] = ((t2 >>>  7) | (t3 <<  9)) & 0x1fff;
+  t4 = key[ 8] & 0xff | (key[ 9] & 0xff) << 8; this.r[4] = ((t3 >>>  4) | (t4 << 12)) & 0x00ff;
+  this.r[5] = ((t4 >>>  1)) & 0x1ffe;
+  t5 = key[10] & 0xff | (key[11] & 0xff) << 8; this.r[6] = ((t4 >>> 14) | (t5 <<  2)) & 0x1fff;
+  t6 = key[12] & 0xff | (key[13] & 0xff) << 8; this.r[7] = ((t5 >>> 11) | (t6 <<  5)) & 0x1f81;
+  t7 = key[14] & 0xff | (key[15] & 0xff) << 8; this.r[8] = ((t6 >>>  8) | (t7 <<  8)) & 0x1fff;
+  this.r[9] = ((t7 >>>  5)) & 0x007f;
+
+  this.pad[0] = key[16] & 0xff | (key[17] & 0xff) << 8;
+  this.pad[1] = key[18] & 0xff | (key[19] & 0xff) << 8;
+  this.pad[2] = key[20] & 0xff | (key[21] & 0xff) << 8;
+  this.pad[3] = key[22] & 0xff | (key[23] & 0xff) << 8;
+  this.pad[4] = key[24] & 0xff | (key[25] & 0xff) << 8;
+  this.pad[5] = key[26] & 0xff | (key[27] & 0xff) << 8;
+  this.pad[6] = key[28] & 0xff | (key[29] & 0xff) << 8;
+  this.pad[7] = key[30] & 0xff | (key[31] & 0xff) << 8;
+};
+
+poly1305.prototype.blocks = function(m, mpos, bytes) {
+  var hibit = this.fin ? 0 : (1 << 11);
+  var t0, t1, t2, t3, t4, t5, t6, t7, c;
+  var d0, d1, d2, d3, d4, d5, d6, d7, d8, d9;
+
+  var h0 = this.h[0],
+      h1 = this.h[1],
+      h2 = this.h[2],
+      h3 = this.h[3],
+      h4 = this.h[4],
+      h5 = this.h[5],
+      h6 = this.h[6],
+      h7 = this.h[7],
+      h8 = this.h[8],
+      h9 = this.h[9];
+
+  var r0 = this.r[0],
+      r1 = this.r[1],
+      r2 = this.r[2],
+      r3 = this.r[3],
+      r4 = this.r[4],
+      r5 = this.r[5],
+      r6 = this.r[6],
+      r7 = this.r[7],
+      r8 = this.r[8],
+      r9 = this.r[9];
+
+  while (bytes >= 16) {
+    t0 = m[mpos+ 0] & 0xff | (m[mpos+ 1] & 0xff) << 8; h0 += ( t0                     ) & 0x1fff;
+    t1 = m[mpos+ 2] & 0xff | (m[mpos+ 3] & 0xff) << 8; h1 += ((t0 >>> 13) | (t1 <<  3)) & 0x1fff;
+    t2 = m[mpos+ 4] & 0xff | (m[mpos+ 5] & 0xff) << 8; h2 += ((t1 >>> 10) | (t2 <<  6)) & 0x1fff;
+    t3 = m[mpos+ 6] & 0xff | (m[mpos+ 7] & 0xff) << 8; h3 += ((t2 >>>  7) | (t3 <<  9)) & 0x1fff;
+    t4 = m[mpos+ 8] & 0xff | (m[mpos+ 9] & 0xff) << 8; h4 += ((t3 >>>  4) | (t4 << 12)) & 0x1fff;
+    h5 += ((t4 >>>  1)) & 0x1fff;
+    t5 = m[mpos+10] & 0xff | (m[mpos+11] & 0xff) << 8; h6 += ((t4 >>> 14) | (t5 <<  2)) & 0x1fff;
+    t6 = m[mpos+12] & 0xff | (m[mpos+13] & 0xff) << 8; h7 += ((t5 >>> 11) | (t6 <<  5)) & 0x1fff;
+    t7 = m[mpos+14] & 0xff | (m[mpos+15] & 0xff) << 8; h8 += ((t6 >>>  8) | (t7 <<  8)) & 0x1fff;
+    h9 += ((t7 >>> 5)) | hibit;
+
+    c = 0;
+
+    d0 = c;
+    d0 += h0 * r0;
+    d0 += h1 * (5 * r9);
+    d0 += h2 * (5 * r8);
+    d0 += h3 * (5 * r7);
+    d0 += h4 * (5 * r6);
+    c = (d0 >>> 13); d0 &= 0x1fff;
+    d0 += h5 * (5 * r5);
+    d0 += h6 * (5 * r4);
+    d0 += h7 * (5 * r3);
+    d0 += h8 * (5 * r2);
+    d0 += h9 * (5 * r1);
+    c += (d0 >>> 13); d0 &= 0x1fff;
+
+    d1 = c;
+    d1 += h0 * r1;
+    d1 += h1 * r0;
+    d1 += h2 * (5 * r9);
+    d1 += h3 * (5 * r8);
+    d1 += h4 * (5 * r7);
+    c = (d1 >>> 13); d1 &= 0x1fff;
+    d1 += h5 * (5 * r6);
+    d1 += h6 * (5 * r5);
+    d1 += h7 * (5 * r4);
+    d1 += h8 * (5 * r3);
+    d1 += h9 * (5 * r2);
+    c += (d1 >>> 13); d1 &= 0x1fff;
+
+    d2 = c;
+    d2 += h0 * r2;
+    d2 += h1 * r1;
+    d2 += h2 * r0;
+    d2 += h3 * (5 * r9);
+    d2 += h4 * (5 * r8);
+    c = (d2 >>> 13); d2 &= 0x1fff;
+    d2 += h5 * (5 * r7);
+    d2 += h6 * (5 * r6);
+    d2 += h7 * (5 * r5);
+    d2 += h8 * (5 * r4);
+    d2 += h9 * (5 * r3);
+    c += (d2 >>> 13); d2 &= 0x1fff;
+
+    d3 = c;
+    d3 += h0 * r3;
+    d3 += h1 * r2;
+    d3 += h2 * r1;
+    d3 += h3 * r0;
+    d3 += h4 * (5 * r9);
+    c = (d3 >>> 13); d3 &= 0x1fff;
+    d3 += h5 * (5 * r8);
+    d3 += h6 * (5 * r7);
+    d3 += h7 * (5 * r6);
+    d3 += h8 * (5 * r5);
+    d3 += h9 * (5 * r4);
+    c += (d3 >>> 13); d3 &= 0x1fff;
+
+    d4 = c;
+    d4 += h0 * r4;
+    d4 += h1 * r3;
+    d4 += h2 * r2;
+    d4 += h3 * r1;
+    d4 += h4 * r0;
+    c = (d4 >>> 13); d4 &= 0x1fff;
+    d4 += h5 * (5 * r9);
+    d4 += h6 * (5 * r8);
+    d4 += h7 * (5 * r7);
+    d4 += h8 * (5 * r6);
+    d4 += h9 * (5 * r5);
+    c += (d4 >>> 13); d4 &= 0x1fff;
+
+    d5 = c;
+    d5 += h0 * r5;
+    d5 += h1 * r4;
+    d5 += h2 * r3;
+    d5 += h3 * r2;
+    d5 += h4 * r1;
+    c = (d5 >>> 13); d5 &= 0x1fff;
+    d5 += h5 * r0;
+    d5 += h6 * (5 * r9);
+    d5 += h7 * (5 * r8);
+    d5 += h8 * (5 * r7);
+    d5 += h9 * (5 * r6);
+    c += (d5 >>> 13); d5 &= 0x1fff;
+
+    d6 = c;
+    d6 += h0 * r6;
+    d6 += h1 * r5;
+    d6 += h2 * r4;
+    d6 += h3 * r3;
+    d6 += h4 * r2;
+    c = (d6 >>> 13); d6 &= 0x1fff;
+    d6 += h5 * r1;
+    d6 += h6 * r0;
+    d6 += h7 * (5 * r9);
+    d6 += h8 * (5 * r8);
+    d6 += h9 * (5 * r7);
+    c += (d6 >>> 13); d6 &= 0x1fff;
+
+    d7 = c;
+    d7 += h0 * r7;
+    d7 += h1 * r6;
+    d7 += h2 * r5;
+    d7 += h3 * r4;
+    d7 += h4 * r3;
+    c = (d7 >>> 13); d7 &= 0x1fff;
+    d7 += h5 * r2;
+    d7 += h6 * r1;
+    d7 += h7 * r0;
+    d7 += h8 * (5 * r9);
+    d7 += h9 * (5 * r8);
+    c += (d7 >>> 13); d7 &= 0x1fff;
+
+    d8 = c;
+    d8 += h0 * r8;
+    d8 += h1 * r7;
+    d8 += h2 * r6;
+    d8 += h3 * r5;
+    d8 += h4 * r4;
+    c = (d8 >>> 13); d8 &= 0x1fff;
+    d8 += h5 * r3;
+    d8 += h6 * r2;
+    d8 += h7 * r1;
+    d8 += h8 * r0;
+    d8 += h9 * (5 * r9);
+    c += (d8 >>> 13); d8 &= 0x1fff;
+
+    d9 = c;
+    d9 += h0 * r9;
+    d9 += h1 * r8;
+    d9 += h2 * r7;
+    d9 += h3 * r6;
+    d9 += h4 * r5;
+    c = (d9 >>> 13); d9 &= 0x1fff;
+    d9 += h5 * r4;
+    d9 += h6 * r3;
+    d9 += h7 * r2;
+    d9 += h8 * r1;
+    d9 += h9 * r0;
+    c += (d9 >>> 13); d9 &= 0x1fff;
+
+    c = (((c << 2) + c)) | 0;
+    c = (c + d0) | 0;
+    d0 = c & 0x1fff;
+    c = (c >>> 13);
+    d1 += c;
+
+    h0 = d0;
+    h1 = d1;
+    h2 = d2;
+    h3 = d3;
+    h4 = d4;
+    h5 = d5;
+    h6 = d6;
+    h7 = d7;
+    h8 = d8;
+    h9 = d9;
+
+    mpos += 16;
+    bytes -= 16;
+  }
+  this.h[0] = h0;
+  this.h[1] = h1;
+  this.h[2] = h2;
+  this.h[3] = h3;
+  this.h[4] = h4;
+  this.h[5] = h5;
+  this.h[6] = h6;
+  this.h[7] = h7;
+  this.h[8] = h8;
+  this.h[9] = h9;
+};
+
+poly1305.prototype.finish = function(mac, macpos) {
+  var g = new Uint16Array(10);
+  var c, mask, f, i;
+
+  if (this.leftover) {
+    i = this.leftover;
+    this.buffer[i++] = 1;
+    for (; i < 16; i++) this.buffer[i] = 0;
+    this.fin = 1;
+    this.blocks(this.buffer, 0, 16);
+  }
+
+  c = this.h[1] >>> 13;
+  this.h[1] &= 0x1fff;
+  for (i = 2; i < 10; i++) {
+    this.h[i] += c;
+    c = this.h[i] >>> 13;
+    this.h[i] &= 0x1fff;
+  }
+  this.h[0] += (c * 5);
+  c = this.h[0] >>> 13;
+  this.h[0] &= 0x1fff;
+  this.h[1] += c;
+  c = this.h[1] >>> 13;
+  this.h[1] &= 0x1fff;
+  this.h[2] += c;
+
+  g[0] = this.h[0] + 5;
+  c = g[0] >>> 13;
+  g[0] &= 0x1fff;
+  for (i = 1; i < 10; i++) {
+    g[i] = this.h[i] + c;
+    c = g[i] >>> 13;
+    g[i] &= 0x1fff;
+  }
+  g[9] -= (1 << 13);
+
+  mask = (c ^ 1) - 1;
+  for (i = 0; i < 10; i++) g[i] &= mask;
+  mask = ~mask;
+  for (i = 0; i < 10; i++) this.h[i] = (this.h[i] & mask) | g[i];
+
+  this.h[0] = ((this.h[0]       ) | (this.h[1] << 13)                    ) & 0xffff;
+  this.h[1] = ((this.h[1] >>>  3) | (this.h[2] << 10)                    ) & 0xffff;
+  this.h[2] = ((this.h[2] >>>  6) | (this.h[3] <<  7)                    ) & 0xffff;
+  this.h[3] = ((this.h[3] >>>  9) | (this.h[4] <<  4)                    ) & 0xffff;
+  this.h[4] = ((this.h[4] >>> 12) | (this.h[5] <<  1) | (this.h[6] << 14)) & 0xffff;
+  this.h[5] = ((this.h[6] >>>  2) | (this.h[7] << 11)                    ) & 0xffff;
+  this.h[6] = ((this.h[7] >>>  5) | (this.h[8] <<  8)                    ) & 0xffff;
+  this.h[7] = ((this.h[8] >>>  8) | (this.h[9] <<  5)                    ) & 0xffff;
+
+  f = this.h[0] + this.pad[0];
+  this.h[0] = f & 0xffff;
+  for (i = 1; i < 8; i++) {
+    f = (((this.h[i] + this.pad[i]) | 0) + (f >>> 16)) | 0;
+    this.h[i] = f & 0xffff;
+  }
+
+  mac[macpos+ 0] = (this.h[0] >>> 0) & 0xff;
+  mac[macpos+ 1] = (this.h[0] >>> 8) & 0xff;
+  mac[macpos+ 2] = (this.h[1] >>> 0) & 0xff;
+  mac[macpos+ 3] = (this.h[1] >>> 8) & 0xff;
+  mac[macpos+ 4] = (this.h[2] >>> 0) & 0xff;
+  mac[macpos+ 5] = (this.h[2] >>> 8) & 0xff;
+  mac[macpos+ 6] = (this.h[3] >>> 0) & 0xff;
+  mac[macpos+ 7] = (this.h[3] >>> 8) & 0xff;
+  mac[macpos+ 8] = (this.h[4] >>> 0) & 0xff;
+  mac[macpos+ 9] = (this.h[4] >>> 8) & 0xff;
+  mac[macpos+10] = (this.h[5] >>> 0) & 0xff;
+  mac[macpos+11] = (this.h[5] >>> 8) & 0xff;
+  mac[macpos+12] = (this.h[6] >>> 0) & 0xff;
+  mac[macpos+13] = (this.h[6] >>> 8) & 0xff;
+  mac[macpos+14] = (this.h[7] >>> 0) & 0xff;
+  mac[macpos+15] = (this.h[7] >>> 8) & 0xff;
+};
+
+poly1305.prototype.update = function(m, mpos, bytes) {
+  var i, want;
+
+  if (this.leftover) {
+    want = (16 - this.leftover);
+    if (want > bytes)
+      want = bytes;
+    for (i = 0; i < want; i++)
+      this.buffer[this.leftover + i] = m[mpos+i];
+    bytes -= want;
+    mpos += want;
+    this.leftover += want;
+    if (this.leftover < 16)
+      return;
+    this.blocks(this.buffer, 0, 16);
+    this.leftover = 0;
+  }
+
+  if (bytes >= 16) {
+    want = bytes - (bytes % 16);
+    this.blocks(m, mpos, want);
+    mpos += want;
+    bytes -= want;
+  }
+
+  if (bytes) {
+    for (i = 0; i < bytes; i++)
+      this.buffer[this.leftover + i] = m[mpos+i];
+    this.leftover += bytes;
+  }
+};
+
+module.exports = poly1305

memory.js

@@ -0,0 +1,30 @@
+/* eslint-disable camelcase */
+
+function sodium_malloc (n) {
+  return new Uint8Array(n)
+}
+
+function sodium_free (n) {
+  sodium_memzero(n)
+  loadSink().port1.postMessage(n.buffer, [n.buffer])
+}
+
+function sodium_memzero (arr) {
+  arr.fill(0)
+}
+
+var sink
+
+function loadSink () {
+  if (sink) return sink
+  var MessageChannel = global.MessageChannel
+  if (MessageChannel == null) ({ MessageChannel } = require('worker' + '_threads'))
+  sink = new MessageChannel()
+  return sink
+}
+
+module.exports = {
+  sodium_malloc,
+  sodium_free,
+  sodium_memzero
+}

package.json

@@ -1,22 +1,52 @@
 {
   "name": "sodium-javascript",
-  "version": "0.2.0",
+  "version": "0.7.3",
   "description": "WIP - a pure javascript version of sodium-native",
   "main": "index.js",
   "dependencies": {
-    "blake2b": "^1.2.0"
+    "blake2b": "^2.1.1",
+    "chacha20-universal": "^1.0.4",
+    "nanoassert": "^2.0.0",
+    "sha256-universal": "^1.1.0",
+    "sha512-universal": "^1.1.0",
+    "siphash24": "^1.0.1",
+    "xsalsa20": "^1.0.0"
   },
   "devDependencies": {
-    "sodium-test": "^0.3.0"
+    "browserify": "^16.5.1",
+    "sodium-test": "^0.10.0",
+    "standard": "^14.3.4",
+    "tape-run": "^7.0.0"
+  },
+  "standard": {
+    "ignore": [
+      "/internal/**/*.js"
+    ]
+  },
+  "browser": {
+    "crypto": false,
+    "worker_threads": false
+  },
+  "react-native": {
+    "crypto": "crypto"
+  },
+  "scripts": {
+    "pretest": "standard",
+    "test": "node test.js",
+    "test-browser": "browserify test.js | tape-run"
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/mafintosh/sodium-javascript.git"
+    "url": "git+https://github.com/sodium-friends/sodium-javascript.git"
   },
-  "author": "Mathias Buus (@mafintosh)",
+  "contributors": [
+    "Christophe Diederichs <chm-diederichs@hyperdivision.dk>",
+    "Emil Bay <github@tixz.dk> (http://bayes.dk)",
+    "Mathias Buus <mathiasbuus@gmail.com> (https://mafinto.sh)"
+  ],
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/mafintosh/sodium-javascript/issues"
+    "url": "https://github.com/sodium-friends/sodium-javascript/issues"
   },
-  "homepage": "https://github.com/mafintosh/sodium-javascript"
+  "homepage": "https://github.com/sodium-friends/sodium-javascript#readme"
 }

randombytes.js

@@ -0,0 +1,40 @@
+var assert = require('nanoassert')
+
+var randombytes = (function () {
+  var QUOTA = 65536 // limit for QuotaExceededException
+  var crypto = global.crypto || global.msCrypto
+
+  function browserBytes (out, n) {
+    for (let i = 0; i < n; i += QUOTA) {
+      crypto.getRandomValues(new Uint8Array(out.buffer, i + out.byteOffset, Math.min(n - i, QUOTA)))
+    }
+  }
+
+  function nodeBytes (out, n) {
+    new Uint8Array(out.buffer, out.byteOffset, n).set(crypto.randomBytes(n))
+  }
+
+  function noImpl () {
+    throw new Error('No secure random number generator available')
+  }
+
+  if (crypto && crypto.getRandomValues) return browserBytes
+
+  if (require != null) {
+    // Node.js. Bust Browserify
+    crypto = require('cry' + 'pto')
+    if (crypto && crypto.randomBytes) return nodeBytes
+  }
+
+  return noImpl
+})()
+
+// Make non enumerable as this is an internal function
+Object.defineProperty(module.exports, 'randombytes', {
+  value: randombytes
+})
+
+module.exports.randombytes_buf = function (out) {
+  assert(out, 'out must be given')
+  randombytes(out, out.byteLength)
+}

test.js

@@ -1 +1,3 @@
 require('sodium-test')(require('.'))
+
+if ((typeof window !== 'undefined') && window.close) window.close()