use xsalsa20 and support crypto_stream_instance

crypto_stream.js

@@ -0,0 +1,33 @@
+var xsalsa20 = require('xsalsa20')
+
+exports.crypto_stream_KEYBYTES = 32
+exports.crypto_stream_NONCEBYTES = 24
+exports.crypto_stream_PRIMITIVE = 'xsalsa20'
+
+exports.crypto_stream = function (out, nonce, key) {
+  out.fill(0)
+  exports.crypto_stream_xor(out, out, nonce, key)
+}
+
+exports.crypto_stream_xor = function (out, inp, nonce, key) {
+  var xor = xsalsa20(nonce, key)
+  xor.update(inp, out)
+  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
+}

index.js

@@ -3,6 +3,7 @@
 // Based on https://github.com/dchest/tweetnacl-js/blob/6dcbcaf5f5cbfd313f2dcfe763db35c828c8ff5b/nacl-fast.js.
 
 var sodium = module.exports
+var cs = require('./crypto_stream')
 
 // Ported in 2014 by Dmitry Chestnykh and Devi Mandiri.
 // Public domain.
@@ -56,412 +57,6 @@ 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
@@ -819,6 +414,14 @@ poly1305.prototype.update = function(m, mpos, bytes) {
   }
 };
 
+function crypto_stream_xor (c, cpos, m, mpos, clen, n, k) {
+  cs.crypto_stream_xor(c, m, n, k)
+}
+
+function crypto_stream (c, cpos, clen, n, k) {
+  cs.crypto_stream(c, n, k)
+}
+
 function crypto_onetimeauth(out, outpos, m, mpos, n, k) {
   var s = new poly1305(k);
   s.update(m, mpos, n);
@@ -1384,32 +987,6 @@ 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,
@@ -2112,19 +1689,20 @@ function crypto_sign_verify_detached (sig, m, pk) {
   return crypto_sign_open(sm, m, pk)
 }
 
-function crypto_stream_wrap(c, n, k) {
+function crypto_secretbox_detached (o, mac, msg, n, k) {
-  check(c, 0)
+  check(mac, sodium.crypto_secretbox_MACBYTES)
-  check(n, sodium.crypto_stream_NONCEBYTES)
+  var tmp = new Uint8Array(msg.length + mac.length)
-  check(k, sodium.crypto_stream_KEYBYTES)
+  crypto_secretbox_easy(tmp, msg, n, k)
-  crypto_stream(c, 0, c.length, n, k)
+  o.set(tmp.subarray(0, msg.length))
+  mac.set(tmp.subarray(msg.length))
 }
 
-function crypto_stream_xor_wrap(c, m, n, k) {
+function crypto_secretbox_open_detached (msg, o, mac, n, k) {
-  check(m, 0)
+  check(mac, sodium.crypto_secretbox_MACBYTES)
-  check(c, m.length)
+  var tmp = new Uint8Array(o.length + mac.length)
-  check(n, sodium.crypto_stream_NONCEBYTES)
+  tmp.set(o)
-  check(k, sodium.crypto_stream_KEYBYTES)
+  tmp.set(mac, msg.length)
-  crypto_stream_xor(c, 0, m, 0, m.length, n, k)
+  return crypto_secretbox_open_easy(msg, tmp, n, k)
 }
 
 function crypto_secretbox_easy(o, msg, n, k) {
@@ -2195,11 +1773,7 @@ forward(require('./crypto_generichash'))
 forward(require('./crypto_kdf'))
 forward(require('./crypto_shorthash'))
 forward(require('./randombytes'))
-
+forward(require('./crypto_stream'))
-sodium.crypto_stream_KEYBYTES = 32
-sodium.crypto_stream_NONCEBYTES = 24
-sodium.crypto_stream = crypto_stream_wrap
-sodium.crypto_stream_xor = crypto_stream_xor_wrap
 
 sodium.crypto_scalarmult_BYTES = crypto_scalarmult_BYTES
 sodium.crypto_scalarmult_SCALARBYTES = crypto_scalarmult_SCALARBYTES
@@ -2211,6 +1785,8 @@ sodium.crypto_secretbox_NONCEBYTES = crypto_secretbox_NONCEBYTES,
 sodium.crypto_secretbox_MACBYTES = 16
 sodium.crypto_secretbox_easy = crypto_secretbox_easy
 sodium.crypto_secretbox_open_easy = crypto_secretbox_open_easy
+sodium.crypto_secretbox_detached = crypto_secretbox_detached
+sodium.crypto_secretbox_open_detached = crypto_secretbox_open_detached
 
 function cleanup(arr) {
   for (var i = 0; i < arr.length; i++) arr[i] = 0;

package.json

@@ -6,22 +6,18 @@
   "dependencies": {
     "blake2b": "^2.1.1",
     "nanoassert": "^1.0.0",
-    "siphash24": "^1.0.1"
+    "siphash24": "^1.0.1",
+    "xsalsa20": "^1.0.0"
   },
   "devDependencies": {
     "browser-run": "^4.0.2",
     "browserify": "^14.1.0",
-    "sodium-test": "^0.5.1"
+    "sodium-test": "^0.6.0"
   },
   "scripts": {
     "browser": "browserify test.js | browser-run",
     "browser-manual": "browserify test.js | browser-run -p 1234",
-    "test": " node test.js"
+    "test": "node test.js"
-  },
-  "browserify": {
-    "transform": [
-      "brfs"
-    ]
   },
   "repository": {
     "type": "git",