From e54c674afc1e02ba8212f1811cbb9bca6d16c2f1 Mon Sep 17 00:00:00 2001 From: Mathias Buus Date: Tue, 24 Jan 2017 11:41:06 +0100 Subject: [PATCH] first commit --- .gitignore | 1 + LICENSE | 21 + README.md | 42 + example.js | 20 + index.js | 2250 ++++++++++++++++++++++++++++++++++++++++++++++++++ package.json | 18 + 6 files changed, 2352 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 example.js create mode 100644 index.js create mode 100644 package.json diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3c3629e --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..56fce08 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2017 Mathias Buus + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..ddec8f2 --- /dev/null +++ b/README.md @@ -0,0 +1,42 @@ +# sodium-javascript + +WIP - a pure javascript version of [sodium-native](https://github.com/mafintosh/sodium-native). +Based on tweetnacl + +``` +npm install sodium-javascript +``` + +## Usage + +``` js +var sodium = require('sodium-javascript') + +var key = new Buffer(sodium.crypto_secretbox_KEYBYTES) +var nonce = new Buffer(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) + +sodium.crypto_secretbox_easy(cipher, message, nonce, key) + +console.log('Encrypted:', cipher) + +var plainText = new Buffer(cipher.length - sodium.crypto_secretbox_MACBYTES) + +sodium.crypto_secretbox_open_easy(plainText, cipher, nonce, key) + +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. + +## License + +MIT diff --git a/example.js b/example.js new file mode 100644 index 0000000..bbcdc9c --- /dev/null +++ b/example.js @@ -0,0 +1,20 @@ +var sodium = require('./') + +var key = new Buffer(sodium.crypto_secretbox_KEYBYTES) +var nonce = new Buffer(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) + +sodium.crypto_secretbox_easy(cipher, message, nonce, key) + +console.log('Encrypted:', cipher) + +var plainText = new Buffer(cipher.length - sodium.crypto_secretbox_MACBYTES) + +sodium.crypto_secretbox_open_easy(plainText, cipher, nonce, key) + +console.log('Plaintext:', plainText.toString()) diff --git a/index.js b/index.js new file mode 100644 index 0000000..3def0c0 --- /dev/null +++ b/index.js @@ -0,0 +1,2250 @@ +'use strict'; + +// Based on https://github.com/dchest/tweetnacl-js/blob/6dcbcaf5f5cbfd313f2dcfe763db35c828c8ff5b/nacl-fast.js. + +var nacl = module.exports + +// Ported in 2014 by Dmitry Chestnykh and Devi Mandiri. +// Public domain. +// +// Implementation derived from TweetNaCl version 20140427. +// See for details: http://tweetnacl.cr.yp.to/ + +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; +}; + +// Pluggable, initialized in high-level API below. +var randombytes = function(/* x, n */) { throw new Error('no PRNG'); }; + +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 ts64(x, i, h, l) { + x[i] = (h >> 24) & 0xff; + x[i+1] = (h >> 16) & 0xff; + x[i+2] = (h >> 8) & 0xff; + x[i+3] = h & 0xff; + x[i+4] = (l >> 24) & 0xff; + x[i+5] = (l >> 16) & 0xff; + x[i+6] = (l >> 8) & 0xff; + x[i+7] = l & 0xff; +} + +function vn(x, xi, y, yi, n) { + var i,d = 0; + for (i = 0; i < n; i++) d |= x[xi+i]^y[yi+i]; + return (1 & ((d - 1) >>> 8)) - 1; +} + +function crypto_verify_16(x, xi, y, yi) { + return vn(x,xi,y,yi,16); +} + +function crypto_verify_32(x, xi, y, yi) { + return vn(x,xi,y,yi,32); +} + +function core_salsa20(o, p, k, c) { + var j0 = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24, + j1 = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24, + j2 = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24, + j3 = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24, + j4 = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24, + j5 = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24, + j6 = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24, + j7 = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24, + j8 = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24, + j9 = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24, + j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24, + j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24, + j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24, + j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24, + j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24, + j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24; + + var x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7, + x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14, + x15 = j15, u; + + for (var i = 0; i < 20; i += 2) { + u = x0 + x12 | 0; + x4 ^= u<<7 | u>>>(32-7); + u = x4 + x0 | 0; + x8 ^= u<<9 | u>>>(32-9); + u = x8 + x4 | 0; + x12 ^= u<<13 | u>>>(32-13); + u = x12 + x8 | 0; + x0 ^= u<<18 | u>>>(32-18); + + u = x5 + x1 | 0; + x9 ^= u<<7 | u>>>(32-7); + u = x9 + x5 | 0; + x13 ^= u<<9 | u>>>(32-9); + u = x13 + x9 | 0; + x1 ^= u<<13 | u>>>(32-13); + u = x1 + x13 | 0; + x5 ^= u<<18 | u>>>(32-18); + + u = x10 + x6 | 0; + x14 ^= u<<7 | u>>>(32-7); + u = x14 + x10 | 0; + x2 ^= u<<9 | u>>>(32-9); + u = x2 + x14 | 0; + x6 ^= u<<13 | u>>>(32-13); + u = x6 + x2 | 0; + x10 ^= u<<18 | u>>>(32-18); + + u = x15 + x11 | 0; + x3 ^= u<<7 | u>>>(32-7); + u = x3 + x15 | 0; + x7 ^= u<<9 | u>>>(32-9); + u = x7 + x3 | 0; + x11 ^= u<<13 | u>>>(32-13); + u = x11 + x7 | 0; + x15 ^= u<<18 | u>>>(32-18); + + u = x0 + x3 | 0; + x1 ^= u<<7 | u>>>(32-7); + u = x1 + x0 | 0; + x2 ^= u<<9 | u>>>(32-9); + u = x2 + x1 | 0; + x3 ^= u<<13 | u>>>(32-13); + u = x3 + x2 | 0; + x0 ^= u<<18 | u>>>(32-18); + + u = x5 + x4 | 0; + x6 ^= u<<7 | u>>>(32-7); + u = x6 + x5 | 0; + x7 ^= u<<9 | u>>>(32-9); + u = x7 + x6 | 0; + x4 ^= u<<13 | u>>>(32-13); + u = x4 + x7 | 0; + x5 ^= u<<18 | u>>>(32-18); + + u = x10 + x9 | 0; + x11 ^= u<<7 | u>>>(32-7); + u = x11 + x10 | 0; + x8 ^= u<<9 | u>>>(32-9); + u = x8 + x11 | 0; + x9 ^= u<<13 | u>>>(32-13); + u = x9 + x8 | 0; + x10 ^= u<<18 | u>>>(32-18); + + u = x15 + x14 | 0; + x12 ^= u<<7 | u>>>(32-7); + u = x12 + x15 | 0; + x13 ^= u<<9 | u>>>(32-9); + u = x13 + x12 | 0; + x14 ^= u<<13 | u>>>(32-13); + u = x14 + x13 | 0; + x15 ^= u<<18 | u>>>(32-18); + } + x0 = x0 + j0 | 0; + x1 = x1 + j1 | 0; + x2 = x2 + j2 | 0; + x3 = x3 + j3 | 0; + x4 = x4 + j4 | 0; + x5 = x5 + j5 | 0; + x6 = x6 + j6 | 0; + x7 = x7 + j7 | 0; + x8 = x8 + j8 | 0; + x9 = x9 + j9 | 0; + x10 = x10 + j10 | 0; + x11 = x11 + j11 | 0; + x12 = x12 + j12 | 0; + x13 = x13 + j13 | 0; + x14 = x14 + j14 | 0; + x15 = x15 + j15 | 0; + + o[ 0] = x0 >>> 0 & 0xff; + o[ 1] = x0 >>> 8 & 0xff; + o[ 2] = x0 >>> 16 & 0xff; + o[ 3] = x0 >>> 24 & 0xff; + + o[ 4] = x1 >>> 0 & 0xff; + o[ 5] = x1 >>> 8 & 0xff; + o[ 6] = x1 >>> 16 & 0xff; + o[ 7] = x1 >>> 24 & 0xff; + + o[ 8] = x2 >>> 0 & 0xff; + o[ 9] = x2 >>> 8 & 0xff; + o[10] = x2 >>> 16 & 0xff; + o[11] = x2 >>> 24 & 0xff; + + o[12] = x3 >>> 0 & 0xff; + o[13] = x3 >>> 8 & 0xff; + o[14] = x3 >>> 16 & 0xff; + o[15] = x3 >>> 24 & 0xff; + + o[16] = x4 >>> 0 & 0xff; + o[17] = x4 >>> 8 & 0xff; + o[18] = x4 >>> 16 & 0xff; + o[19] = x4 >>> 24 & 0xff; + + o[20] = x5 >>> 0 & 0xff; + o[21] = x5 >>> 8 & 0xff; + o[22] = x5 >>> 16 & 0xff; + o[23] = x5 >>> 24 & 0xff; + + o[24] = x6 >>> 0 & 0xff; + o[25] = x6 >>> 8 & 0xff; + o[26] = x6 >>> 16 & 0xff; + o[27] = x6 >>> 24 & 0xff; + + o[28] = x7 >>> 0 & 0xff; + o[29] = x7 >>> 8 & 0xff; + o[30] = x7 >>> 16 & 0xff; + o[31] = x7 >>> 24 & 0xff; + + o[32] = x8 >>> 0 & 0xff; + o[33] = x8 >>> 8 & 0xff; + o[34] = x8 >>> 16 & 0xff; + o[35] = x8 >>> 24 & 0xff; + + o[36] = x9 >>> 0 & 0xff; + o[37] = x9 >>> 8 & 0xff; + o[38] = x9 >>> 16 & 0xff; + o[39] = x9 >>> 24 & 0xff; + + o[40] = x10 >>> 0 & 0xff; + o[41] = x10 >>> 8 & 0xff; + o[42] = x10 >>> 16 & 0xff; + o[43] = x10 >>> 24 & 0xff; + + o[44] = x11 >>> 0 & 0xff; + o[45] = x11 >>> 8 & 0xff; + o[46] = x11 >>> 16 & 0xff; + o[47] = x11 >>> 24 & 0xff; + + o[48] = x12 >>> 0 & 0xff; + o[49] = x12 >>> 8 & 0xff; + o[50] = x12 >>> 16 & 0xff; + o[51] = x12 >>> 24 & 0xff; + + o[52] = x13 >>> 0 & 0xff; + o[53] = x13 >>> 8 & 0xff; + o[54] = x13 >>> 16 & 0xff; + o[55] = x13 >>> 24 & 0xff; + + o[56] = x14 >>> 0 & 0xff; + o[57] = x14 >>> 8 & 0xff; + o[58] = x14 >>> 16 & 0xff; + o[59] = x14 >>> 24 & 0xff; + + o[60] = x15 >>> 0 & 0xff; + o[61] = x15 >>> 8 & 0xff; + o[62] = x15 >>> 16 & 0xff; + o[63] = x15 >>> 24 & 0xff; +} + +function core_hsalsa20(o,p,k,c) { + var j0 = c[ 0] & 0xff | (c[ 1] & 0xff)<<8 | (c[ 2] & 0xff)<<16 | (c[ 3] & 0xff)<<24, + j1 = k[ 0] & 0xff | (k[ 1] & 0xff)<<8 | (k[ 2] & 0xff)<<16 | (k[ 3] & 0xff)<<24, + j2 = k[ 4] & 0xff | (k[ 5] & 0xff)<<8 | (k[ 6] & 0xff)<<16 | (k[ 7] & 0xff)<<24, + j3 = k[ 8] & 0xff | (k[ 9] & 0xff)<<8 | (k[10] & 0xff)<<16 | (k[11] & 0xff)<<24, + j4 = k[12] & 0xff | (k[13] & 0xff)<<8 | (k[14] & 0xff)<<16 | (k[15] & 0xff)<<24, + j5 = c[ 4] & 0xff | (c[ 5] & 0xff)<<8 | (c[ 6] & 0xff)<<16 | (c[ 7] & 0xff)<<24, + j6 = p[ 0] & 0xff | (p[ 1] & 0xff)<<8 | (p[ 2] & 0xff)<<16 | (p[ 3] & 0xff)<<24, + j7 = p[ 4] & 0xff | (p[ 5] & 0xff)<<8 | (p[ 6] & 0xff)<<16 | (p[ 7] & 0xff)<<24, + j8 = p[ 8] & 0xff | (p[ 9] & 0xff)<<8 | (p[10] & 0xff)<<16 | (p[11] & 0xff)<<24, + j9 = p[12] & 0xff | (p[13] & 0xff)<<8 | (p[14] & 0xff)<<16 | (p[15] & 0xff)<<24, + j10 = c[ 8] & 0xff | (c[ 9] & 0xff)<<8 | (c[10] & 0xff)<<16 | (c[11] & 0xff)<<24, + j11 = k[16] & 0xff | (k[17] & 0xff)<<8 | (k[18] & 0xff)<<16 | (k[19] & 0xff)<<24, + j12 = k[20] & 0xff | (k[21] & 0xff)<<8 | (k[22] & 0xff)<<16 | (k[23] & 0xff)<<24, + j13 = k[24] & 0xff | (k[25] & 0xff)<<8 | (k[26] & 0xff)<<16 | (k[27] & 0xff)<<24, + j14 = k[28] & 0xff | (k[29] & 0xff)<<8 | (k[30] & 0xff)<<16 | (k[31] & 0xff)<<24, + j15 = c[12] & 0xff | (c[13] & 0xff)<<8 | (c[14] & 0xff)<<16 | (c[15] & 0xff)<<24; + + var x0 = j0, x1 = j1, x2 = j2, x3 = j3, x4 = j4, x5 = j5, x6 = j6, x7 = j7, + x8 = j8, x9 = j9, x10 = j10, x11 = j11, x12 = j12, x13 = j13, x14 = j14, + x15 = j15, u; + + for (var i = 0; i < 20; i += 2) { + u = x0 + x12 | 0; + x4 ^= u<<7 | u>>>(32-7); + u = x4 + x0 | 0; + x8 ^= u<<9 | u>>>(32-9); + u = x8 + x4 | 0; + x12 ^= u<<13 | u>>>(32-13); + u = x12 + x8 | 0; + x0 ^= u<<18 | u>>>(32-18); + + u = x5 + x1 | 0; + x9 ^= u<<7 | u>>>(32-7); + u = x9 + x5 | 0; + x13 ^= u<<9 | u>>>(32-9); + u = x13 + x9 | 0; + x1 ^= u<<13 | u>>>(32-13); + u = x1 + x13 | 0; + x5 ^= u<<18 | u>>>(32-18); + + u = x10 + x6 | 0; + x14 ^= u<<7 | u>>>(32-7); + u = x14 + x10 | 0; + x2 ^= u<<9 | u>>>(32-9); + u = x2 + x14 | 0; + x6 ^= u<<13 | u>>>(32-13); + u = x6 + x2 | 0; + x10 ^= u<<18 | u>>>(32-18); + + u = x15 + x11 | 0; + x3 ^= u<<7 | u>>>(32-7); + u = x3 + x15 | 0; + x7 ^= u<<9 | u>>>(32-9); + u = x7 + x3 | 0; + x11 ^= u<<13 | u>>>(32-13); + u = x11 + x7 | 0; + x15 ^= u<<18 | u>>>(32-18); + + u = x0 + x3 | 0; + x1 ^= u<<7 | u>>>(32-7); + u = x1 + x0 | 0; + x2 ^= u<<9 | u>>>(32-9); + u = x2 + x1 | 0; + x3 ^= u<<13 | u>>>(32-13); + u = x3 + x2 | 0; + x0 ^= u<<18 | u>>>(32-18); + + u = x5 + x4 | 0; + x6 ^= u<<7 | u>>>(32-7); + u = x6 + x5 | 0; + x7 ^= u<<9 | u>>>(32-9); + u = x7 + x6 | 0; + x4 ^= u<<13 | u>>>(32-13); + u = x4 + x7 | 0; + x5 ^= u<<18 | u>>>(32-18); + + u = x10 + x9 | 0; + x11 ^= u<<7 | u>>>(32-7); + u = x11 + x10 | 0; + x8 ^= u<<9 | u>>>(32-9); + u = x8 + x11 | 0; + x9 ^= u<<13 | u>>>(32-13); + u = x9 + x8 | 0; + x10 ^= u<<18 | u>>>(32-18); + + u = x15 + x14 | 0; + x12 ^= u<<7 | u>>>(32-7); + u = x12 + x15 | 0; + x13 ^= u<<9 | u>>>(32-9); + u = x13 + x12 | 0; + x14 ^= u<<13 | u>>>(32-13); + u = x14 + x13 | 0; + x15 ^= u<<18 | u>>>(32-18); + } + + o[ 0] = x0 >>> 0 & 0xff; + o[ 1] = x0 >>> 8 & 0xff; + o[ 2] = x0 >>> 16 & 0xff; + o[ 3] = x0 >>> 24 & 0xff; + + o[ 4] = x5 >>> 0 & 0xff; + o[ 5] = x5 >>> 8 & 0xff; + o[ 6] = x5 >>> 16 & 0xff; + o[ 7] = x5 >>> 24 & 0xff; + + o[ 8] = x10 >>> 0 & 0xff; + o[ 9] = x10 >>> 8 & 0xff; + o[10] = x10 >>> 16 & 0xff; + o[11] = x10 >>> 24 & 0xff; + + o[12] = x15 >>> 0 & 0xff; + o[13] = x15 >>> 8 & 0xff; + o[14] = x15 >>> 16 & 0xff; + o[15] = x15 >>> 24 & 0xff; + + o[16] = x6 >>> 0 & 0xff; + o[17] = x6 >>> 8 & 0xff; + o[18] = x6 >>> 16 & 0xff; + o[19] = x6 >>> 24 & 0xff; + + o[20] = x7 >>> 0 & 0xff; + o[21] = x7 >>> 8 & 0xff; + o[22] = x7 >>> 16 & 0xff; + o[23] = x7 >>> 24 & 0xff; + + o[24] = x8 >>> 0 & 0xff; + o[25] = x8 >>> 8 & 0xff; + o[26] = x8 >>> 16 & 0xff; + o[27] = x8 >>> 24 & 0xff; + + o[28] = x9 >>> 0 & 0xff; + o[29] = x9 >>> 8 & 0xff; + o[30] = x9 >>> 16 & 0xff; + o[31] = x9 >>> 24 & 0xff; +} + +function crypto_core_salsa20(out,inp,k,c) { + core_salsa20(out,inp,k,c); +} + +function crypto_core_hsalsa20(out,inp,k,c) { + core_hsalsa20(out,inp,k,c); +} + +var sigma = new Uint8Array([101, 120, 112, 97, 110, 100, 32, 51, 50, 45, 98, 121, 116, 101, 32, 107]); + // "expand 32-byte k" + +function crypto_stream_salsa20_xor(c,cpos,m,mpos,b,n,k) { + var z = new Uint8Array(16), x = new Uint8Array(64); + var u, i; + for (i = 0; i < 16; i++) z[i] = 0; + for (i = 0; i < 8; i++) z[i] = n[i]; + while (b >= 64) { + crypto_core_salsa20(x,z,k,sigma); + for (i = 0; i < 64; i++) c[cpos+i] = m[mpos+i] ^ x[i]; + u = 1; + for (i = 8; i < 16; i++) { + u = u + (z[i] & 0xff) | 0; + z[i] = u & 0xff; + u >>>= 8; + } + b -= 64; + cpos += 64; + mpos += 64; + } + if (b > 0) { + crypto_core_salsa20(x,z,k,sigma); + for (i = 0; i < b; i++) c[cpos+i] = m[mpos+i] ^ x[i]; + } + return 0; +} + +function crypto_stream_salsa20(c,cpos,b,n,k) { + var z = new Uint8Array(16), x = new Uint8Array(64); + var u, i; + for (i = 0; i < 16; i++) z[i] = 0; + for (i = 0; i < 8; i++) z[i] = n[i]; + while (b >= 64) { + crypto_core_salsa20(x,z,k,sigma); + for (i = 0; i < 64; i++) c[cpos+i] = x[i]; + u = 1; + for (i = 8; i < 16; i++) { + u = u + (z[i] & 0xff) | 0; + z[i] = u & 0xff; + u >>>= 8; + } + b -= 64; + cpos += 64; + } + if (b > 0) { + crypto_core_salsa20(x,z,k,sigma); + for (i = 0; i < b; i++) c[cpos+i] = x[i]; + } + return 0; +} + +function crypto_stream(c,cpos,d,n,k) { + var s = new Uint8Array(32); + crypto_core_hsalsa20(s,n,k,sigma); + var sn = new Uint8Array(8); + for (var i = 0; i < 8; i++) sn[i] = n[i+16]; + return crypto_stream_salsa20(c,cpos,d,sn,s); +} + +function crypto_stream_xor(c,cpos,m,mpos,d,n,k) { + var s = new Uint8Array(32); + crypto_core_hsalsa20(s,n,k,sigma); + var sn = new Uint8Array(8); + for (var i = 0; i < 8; i++) sn[i] = n[i+16]; + return crypto_stream_salsa20_xor(c,cpos,m,mpos,d,sn,s); +} + +/* +* Port of Andrew Moon's Poly1305-donna-16. Public domain. +* https://github.com/floodyberry/poly1305-donna +*/ + +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; + } +}; + +function crypto_onetimeauth(out, outpos, m, mpos, n, k) { + var s = new poly1305(k); + s.update(m, mpos, n); + s.finish(out, outpos); + return 0; +} + +function crypto_onetimeauth_verify(h, hpos, m, mpos, n, k) { + var x = new Uint8Array(16); + crypto_onetimeauth(x,0,m,mpos,n,k); + return crypto_verify_16(h,hpos,x,0); +} + +function crypto_secretbox(c,m,d,n,k) { + var i; + if (d < 32) return -1; + crypto_stream_xor(c,0,m,0,d,n,k); + crypto_onetimeauth(c, 16, c, 32, d - 32, c); + for (i = 0; i < 16; i++) c[i] = 0; + return 0; +} + +function crypto_secretbox_open(m,c,d,n,k) { + var i; + var x = new Uint8Array(32); + if (d < 32) return -1; + crypto_stream(x,0,32,n,k); + if (crypto_onetimeauth_verify(c, 16,c, 32,d - 32,x) !== 0) return -1; + crypto_stream_xor(m,0,c,0,d,n,k); + for (i = 0; i < 32; i++) m[i] = 0; + return 0; +} + +function set25519(r, a) { + var i; + for (i = 0; i < 16; i++) r[i] = a[i]|0; +} + +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); +} + +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 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 par25519(a) { + var d = new Uint8Array(32); + pack25519(d, a); + return d[0] & 1; +} + +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 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 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 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 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 crypto_box_keypair(y, x) { + randombytes(x, 32); + return crypto_scalarmult_base(y, x); +} + +function crypto_box_beforenm(k, y, x) { + var s = new Uint8Array(32); + crypto_scalarmult(s, x, y); + return crypto_core_hsalsa20(k, _0, s, sigma); +} + +var crypto_box_afternm = crypto_secretbox; +var crypto_box_open_afternm = crypto_secretbox_open; + +function crypto_box(c, m, d, n, y, x) { + var k = new Uint8Array(32); + crypto_box_beforenm(k, y, x); + return crypto_box_afternm(c, m, d, n, k); +} + +function crypto_box_open(m, c, d, n, y, x) { + var k = new Uint8Array(32); + crypto_box_beforenm(k, y, x); + return crypto_box_open_afternm(m, c, d, n, k); +} + +var K = [ + 0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd, + 0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc, + 0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019, + 0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118, + 0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe, + 0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2, + 0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1, + 0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694, + 0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3, + 0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65, + 0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483, + 0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5, + 0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210, + 0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4, + 0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725, + 0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70, + 0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926, + 0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df, + 0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8, + 0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b, + 0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001, + 0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30, + 0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910, + 0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8, + 0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53, + 0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8, + 0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb, + 0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3, + 0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60, + 0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec, + 0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9, + 0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b, + 0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207, + 0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178, + 0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6, + 0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b, + 0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493, + 0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c, + 0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a, + 0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817 +]; + +function crypto_hashblocks_hl(hh, hl, m, n) { + var wh = new Int32Array(16), wl = new Int32Array(16), + bh0, bh1, bh2, bh3, bh4, bh5, bh6, bh7, + bl0, bl1, bl2, bl3, bl4, bl5, bl6, bl7, + th, tl, i, j, h, l, a, b, c, d; + + var ah0 = hh[0], + ah1 = hh[1], + ah2 = hh[2], + ah3 = hh[3], + ah4 = hh[4], + ah5 = hh[5], + ah6 = hh[6], + ah7 = hh[7], + + al0 = hl[0], + al1 = hl[1], + al2 = hl[2], + al3 = hl[3], + al4 = hl[4], + al5 = hl[5], + al6 = hl[6], + al7 = hl[7]; + + var pos = 0; + while (n >= 128) { + for (i = 0; i < 16; i++) { + j = 8 * i + pos; + wh[i] = (m[j+0] << 24) | (m[j+1] << 16) | (m[j+2] << 8) | m[j+3]; + wl[i] = (m[j+4] << 24) | (m[j+5] << 16) | (m[j+6] << 8) | m[j+7]; + } + for (i = 0; i < 80; i++) { + bh0 = ah0; + bh1 = ah1; + bh2 = ah2; + bh3 = ah3; + bh4 = ah4; + bh5 = ah5; + bh6 = ah6; + bh7 = ah7; + + bl0 = al0; + bl1 = al1; + bl2 = al2; + bl3 = al3; + bl4 = al4; + bl5 = al5; + bl6 = al6; + bl7 = al7; + + // add + h = ah7; + l = al7; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + // Sigma1 + h = ((ah4 >>> 14) | (al4 << (32-14))) ^ ((ah4 >>> 18) | (al4 << (32-18))) ^ ((al4 >>> (41-32)) | (ah4 << (32-(41-32)))); + l = ((al4 >>> 14) | (ah4 << (32-14))) ^ ((al4 >>> 18) | (ah4 << (32-18))) ^ ((ah4 >>> (41-32)) | (al4 << (32-(41-32)))); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // Ch + h = (ah4 & ah5) ^ (~ah4 & ah6); + l = (al4 & al5) ^ (~al4 & al6); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // K + h = K[i*2]; + l = K[i*2+1]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // w + h = wh[i%16]; + l = wl[i%16]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + th = c & 0xffff | d << 16; + tl = a & 0xffff | b << 16; + + // add + h = th; + l = tl; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + // Sigma0 + h = ((ah0 >>> 28) | (al0 << (32-28))) ^ ((al0 >>> (34-32)) | (ah0 << (32-(34-32)))) ^ ((al0 >>> (39-32)) | (ah0 << (32-(39-32)))); + l = ((al0 >>> 28) | (ah0 << (32-28))) ^ ((ah0 >>> (34-32)) | (al0 << (32-(34-32)))) ^ ((ah0 >>> (39-32)) | (al0 << (32-(39-32)))); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // Maj + h = (ah0 & ah1) ^ (ah0 & ah2) ^ (ah1 & ah2); + l = (al0 & al1) ^ (al0 & al2) ^ (al1 & al2); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + bh7 = (c & 0xffff) | (d << 16); + bl7 = (a & 0xffff) | (b << 16); + + // add + h = bh3; + l = bl3; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = th; + l = tl; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + bh3 = (c & 0xffff) | (d << 16); + bl3 = (a & 0xffff) | (b << 16); + + ah1 = bh0; + ah2 = bh1; + ah3 = bh2; + ah4 = bh3; + ah5 = bh4; + ah6 = bh5; + ah7 = bh6; + ah0 = bh7; + + al1 = bl0; + al2 = bl1; + al3 = bl2; + al4 = bl3; + al5 = bl4; + al6 = bl5; + al7 = bl6; + al0 = bl7; + + if (i%16 === 15) { + for (j = 0; j < 16; j++) { + // add + h = wh[j]; + l = wl[j]; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = wh[(j+9)%16]; + l = wl[(j+9)%16]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // sigma0 + th = wh[(j+1)%16]; + tl = wl[(j+1)%16]; + h = ((th >>> 1) | (tl << (32-1))) ^ ((th >>> 8) | (tl << (32-8))) ^ (th >>> 7); + l = ((tl >>> 1) | (th << (32-1))) ^ ((tl >>> 8) | (th << (32-8))) ^ ((tl >>> 7) | (th << (32-7))); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + // sigma1 + th = wh[(j+14)%16]; + tl = wl[(j+14)%16]; + h = ((th >>> 19) | (tl << (32-19))) ^ ((tl >>> (61-32)) | (th << (32-(61-32)))) ^ (th >>> 6); + l = ((tl >>> 19) | (th << (32-19))) ^ ((th >>> (61-32)) | (tl << (32-(61-32)))) ^ ((tl >>> 6) | (th << (32-6))); + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + wh[j] = (c & 0xffff) | (d << 16); + wl[j] = (a & 0xffff) | (b << 16); + } + } + } + + // add + h = ah0; + l = al0; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[0]; + l = hl[0]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[0] = ah0 = (c & 0xffff) | (d << 16); + hl[0] = al0 = (a & 0xffff) | (b << 16); + + h = ah1; + l = al1; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[1]; + l = hl[1]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[1] = ah1 = (c & 0xffff) | (d << 16); + hl[1] = al1 = (a & 0xffff) | (b << 16); + + h = ah2; + l = al2; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[2]; + l = hl[2]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[2] = ah2 = (c & 0xffff) | (d << 16); + hl[2] = al2 = (a & 0xffff) | (b << 16); + + h = ah3; + l = al3; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[3]; + l = hl[3]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[3] = ah3 = (c & 0xffff) | (d << 16); + hl[3] = al3 = (a & 0xffff) | (b << 16); + + h = ah4; + l = al4; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[4]; + l = hl[4]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[4] = ah4 = (c & 0xffff) | (d << 16); + hl[4] = al4 = (a & 0xffff) | (b << 16); + + h = ah5; + l = al5; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[5]; + l = hl[5]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[5] = ah5 = (c & 0xffff) | (d << 16); + hl[5] = al5 = (a & 0xffff) | (b << 16); + + h = ah6; + l = al6; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[6]; + l = hl[6]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[6] = ah6 = (c & 0xffff) | (d << 16); + hl[6] = al6 = (a & 0xffff) | (b << 16); + + h = ah7; + l = al7; + + a = l & 0xffff; b = l >>> 16; + c = h & 0xffff; d = h >>> 16; + + h = hh[7]; + l = hl[7]; + + a += l & 0xffff; b += l >>> 16; + c += h & 0xffff; d += h >>> 16; + + b += a >>> 16; + c += b >>> 16; + d += c >>> 16; + + hh[7] = ah7 = (c & 0xffff) | (d << 16); + hl[7] = al7 = (a & 0xffff) | (b << 16); + + pos += 128; + n -= 128; + } + + return n; +} + +function crypto_hash(out, m, n) { + var hh = new Int32Array(8), + hl = new Int32Array(8), + x = new Uint8Array(256), + i, b = n; + + hh[0] = 0x6a09e667; + hh[1] = 0xbb67ae85; + hh[2] = 0x3c6ef372; + hh[3] = 0xa54ff53a; + hh[4] = 0x510e527f; + hh[5] = 0x9b05688c; + hh[6] = 0x1f83d9ab; + hh[7] = 0x5be0cd19; + + hl[0] = 0xf3bcc908; + hl[1] = 0x84caa73b; + hl[2] = 0xfe94f82b; + hl[3] = 0x5f1d36f1; + hl[4] = 0xade682d1; + hl[5] = 0x2b3e6c1f; + hl[6] = 0xfb41bd6b; + hl[7] = 0x137e2179; + + crypto_hashblocks_hl(hh, hl, m, n); + n %= 128; + + for (i = 0; i < n; i++) x[i] = m[b-n+i]; + x[n] = 128; + + n = 256-128*(n<112?1:0); + x[n-9] = 0; + ts64(x, n-8, (b / 0x20000000) | 0, b << 3); + crypto_hashblocks_hl(hh, hl, x, n); + + for (i = 0; i < 8; i++) ts64(out, 8*i, hh[i], hl[i]); + + return 0; +} + +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) { + 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, q, b); + add(q, p); + add(p, p); + cswap(p, q, 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, nacl.crypto_sign_PUBLICKEYBYTES) + check(sk, nacl.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]; + return 0; +} + +function crypto_sign_seed_keypair (pk, sk, seed) { + check(seed, nacl.crypto_sign_SEEDBYTES) + seed.copy(sk) + 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), i; + for (i = 0; i < 64; i++) x[i] = r[i]; + for (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); +} + +function crypto_sign_detached(sig, m, sk) { + var sm = new Uint8Array(m.length + crypto_sign_BYTES) + crypto_sign(sm, m, sk) + for (var i = 0; i < 32; 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 -1; + + if (par25519(r[0]) === (p[31]>>7)) Z(r[0], gf0, r[0]); + + M(r[3], r[0], r[1]); + return 0; +} + +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; + } + + for (i = 0; i < n; i++) msg[i] = sm[i + 64]; + mlen = n; + return true; +} + +function crypto_sign_verify_detached (sig, m, pk) { + check(sig, crypto_sign_BYTES) + var sm = new Uint8Array(m.length + sig.length) + var i = 0 + for (i = 0; i < 64; i++) sm[i] = m[i] + for (i = 0; i < m.length; i++) sm[i + 64] = m[i] + return crypto_sign_open(sm, m, pk) +} + +function randombytes_buf (n) { + randombytes(n, n.length) +} + +function crypto_stream_wrap(c, n, k) { + check(c, 0) + check(n, nacl.crypto_stream_NONCEBYTES) + check(k, nacl.crypto_stream_KEYBYTES) + crypto_stream(c, 0, c.length, n, k) +} + +function crypto_stream_xor_wrap(c, m, n, k) { + check(m, 0) + check(c, m.length) + check(n, nacl.crypto_stream_NONCEBYTES) + check(k, nacl.crypto_stream_KEYBYTES) + crypto_stream_xor(c, 0, m, 0, m.length, n, k) +} + +function crypto_secretbox_easy(o, msg, n, k) { + check(msg, 0) + check(o, msg.length + nacl.crypto_secretbox_MACBYTES) + check(n, crypto_secretbox_NONCEBYTES) + check(k, crypto_secretbox_KEYBYTES) + + var i + var m = new Uint8Array(crypto_secretbox_ZEROBYTES + msg.length); + var c = new Uint8Array(m.length); + for (i = 0; i < msg.length; i++) m[i+crypto_secretbox_ZEROBYTES] = msg[i]; + crypto_secretbox(c, m, m.length, n, k); + for (i = crypto_secretbox_BOXZEROBYTES; i < c.length; i++) o[i - crypto_secretbox_BOXZEROBYTES] = c[i] +} + +function crypto_secretbox_open_easy(msg, box, n, k) { + check(box, nacl.crypto_secretbox_MACBYTES) + check(msg, box.length - nacl.crypto_secretbox_MACBYTES) + check(n, crypto_secretbox_NONCEBYTES) + check(k, crypto_secretbox_KEYBYTES) + + var i + var c = new Uint8Array(crypto_secretbox_BOXZEROBYTES + box.length); + var m = new Uint8Array(c.length); + for (i = 0; i < box.length; i++) c[i+crypto_secretbox_BOXZEROBYTES] = box[i]; + if (c.length < 32) return false; + if (crypto_secretbox_open(m, c, c.length, n, k) !== 0) return false; + + for (i = crypto_secretbox_ZEROBYTES; i < m.length; i++) msg[i - crypto_secretbox_ZEROBYTES] = m[i] + return true +} + +var crypto_secretbox_KEYBYTES = 32, + crypto_secretbox_NONCEBYTES = 24, + crypto_secretbox_ZEROBYTES = 32, + crypto_secretbox_BOXZEROBYTES = 16, + crypto_scalarmult_BYTES = 32, + crypto_scalarmult_SCALARBYTES = 32, + crypto_box_PUBLICKEYBYTES = 32, + crypto_box_SECRETKEYBYTES = 32, + crypto_box_BEFORENMBYTES = 32, + crypto_box_NONCEBYTES = crypto_secretbox_NONCEBYTES, + crypto_box_ZEROBYTES = crypto_secretbox_ZEROBYTES, + crypto_box_BOXZEROBYTES = crypto_secretbox_BOXZEROBYTES, + crypto_sign_BYTES = 64, + crypto_sign_PUBLICKEYBYTES = 32, + crypto_sign_SECRETKEYBYTES = 64, + crypto_sign_SEEDBYTES = 32, + crypto_hash_BYTES = 64; + +nacl.randombytes_buf = randombytes_buf + +nacl.crypto_sign_BYTES = crypto_sign_BYTES +nacl.crypto_sign_PUBLICKEYBYTES = crypto_sign_PUBLICKEYBYTES +nacl.crypto_sign_SECRETKEYBYTES = crypto_sign_SECRETKEYBYTES +nacl.crypto_sign_SEEDBYTES = crypto_sign_SEEDBYTES +nacl.crypto_sign_keypair = crypto_sign_keypair +nacl.crypto_sign_seed_keypair = crypto_sign_seed_keypair +nacl.crypto_sign = crypto_sign +nacl.crypto_sign_open = crypto_sign_open +nacl.crypto_sign_detached = crypto_sign_detached +nacl.crypto_sign_verify_detached = crypto_sign_verify_detached + +nacl.crypto_stream_KEYBYTES = 32 +nacl.crypto_stream_NONCEBYTES = 24 +nacl.crypto_stream = crypto_stream_wrap +nacl.crypto_stream_xor = crypto_stream_xor_wrap + +nacl.crypto_scalarmult_BYTES = crypto_scalarmult_BYTES +nacl.crypto_scalarmult_SCALARBYTES = crypto_scalarmult_SCALARBYTES +nacl.crypto_scalarmult_base = crypto_scalarmult_base +nacl.crypto_scalarmult = crypto_scalarmult + +nacl.crypto_secretbox_KEYBYTES = crypto_secretbox_KEYBYTES, +nacl.crypto_secretbox_NONCEBYTES = crypto_secretbox_NONCEBYTES, +nacl.crypto_secretbox_MACBYTES = 16 +nacl.crypto_secretbox_easy = crypto_secretbox_easy +nacl.crypto_secretbox_open_easy = crypto_secretbox_open_easy + +function cleanup(arr) { + for (var i = 0; i < arr.length; i++) arr[i] = 0; +} + +function check (buf, len) { + if (!buf || (len && buf.length < len)) throw new Error('Argument must be a buffer' + (len ? ' of length ' + len : '')) +} + +nacl.setPRNG = function(fn) { + randombytes = fn; +}; + +(function() { + // Initialize PRNG if environment provides CSPRNG. + // If not, methods calling randombytes will throw. + var crypto = typeof self !== 'undefined' ? (self.crypto || self.msCrypto) : null; + if (crypto && crypto.getRandomValues) { + // Browsers. + var QUOTA = 65536; + nacl.setPRNG(function(x, n) { + var i, v = new Uint8Array(n); + for (i = 0; i < n; i += QUOTA) { + crypto.getRandomValues(v.subarray(i, i + Math.min(n - i, QUOTA))); + } + for (i = 0; i < n; i++) x[i] = v[i]; + cleanup(v); + }); + } else if (typeof require !== 'undefined') { + // Node.js. + crypto = require('cry' + 'pto'); + if (crypto && crypto.randomBytes) { + nacl.setPRNG(function(x, n) { + var i, v = crypto.randomBytes(n); + for (i = 0; i < n; i++) x[i] = v[i]; + cleanup(v); + }); + } + } +})(); diff --git a/package.json b/package.json new file mode 100644 index 0000000..84e7663 --- /dev/null +++ b/package.json @@ -0,0 +1,18 @@ +{ + "name": "sodium-javascript", + "version": "0.0.0", + "description": "WIP - a pure javascript version of sodium-native", + "main": "index.js", + "dependencies": {}, + "devDependencies": {}, + "repository": { + "type": "git", + "url": "https://github.com/mafintosh/sodium-javascript.git" + }, + "author": "Mathias Buus (@mafintosh)", + "license": "MIT", + "bugs": { + "url": "https://github.com/mafintosh/sodium-javascript/issues" + }, + "homepage": "https://github.com/mafintosh/sodium-javascript" +}