Added export_allowed file to make repository visible in cgit

1 files changed, 1175 insertions, 0 deletions

diff --git a/node_modules/tweetnacl/nacl.js b/node_modules/tweetnacl/nacl.js
new file mode 100644
index 0000000..f72dd78
--- /dev/null
+++ b/node_modules/tweetnacl/nacl.js
@@ -0,0 +1,1175 @@
+(function(nacl) {
+'use strict';
+
+// 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 u64 = function(h, l) { this.hi = h|0 >>> 0; this.lo = l|0 >>> 0; };
+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 L32(x, c) { return (x << c) | (x >>> (32 - c)); }
+
+function ld32(x, i) {
+  var u = x[i+3] & 0xff;
+  u = (u<<8)|(x[i+2] & 0xff);
+  u = (u<<8)|(x[i+1] & 0xff);
+  return (u<<8)|(x[i+0] & 0xff);
+}
+
+function dl64(x, i) {
+  var h = (x[i] << 24) | (x[i+1] << 16) | (x[i+2] << 8) | x[i+3];
+  var l = (x[i+4] << 24) | (x[i+5] << 16) | (x[i+6] << 8) | x[i+7];
+  return new u64(h, l);
+}
+
+function st32(x, j, u) {
+  var i;
+  for (i = 0; i < 4; i++) { x[j+i] = u & 255; u >>>= 8; }
+}
+
+function ts64(x, i, u) {
+  x[i]   = (u.hi >> 24) & 0xff;
+  x[i+1] = (u.hi >> 16) & 0xff;
+  x[i+2] = (u.hi >>  8) & 0xff;
+  x[i+3] = u.hi & 0xff;
+  x[i+4] = (u.lo >> 24)  & 0xff;
+  x[i+5] = (u.lo >> 16)  & 0xff;
+  x[i+6] = (u.lo >>  8)  & 0xff;
+  x[i+7] = u.lo & 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(out,inp,k,c,h) {
+  var w = new Uint32Array(16), x = new Uint32Array(16),
+      y = new Uint32Array(16), t = new Uint32Array(4);
+  var i, j, m;
+
+  for (i = 0; i < 4; i++) {
+    x[5*i] = ld32(c, 4*i);
+    x[1+i] = ld32(k, 4*i);
+    x[6+i] = ld32(inp, 4*i);
+    x[11+i] = ld32(k, 16+4*i);
+  }
+
+  for (i = 0; i < 16; i++) y[i] = x[i];
+
+  for (i = 0; i < 20; i++) {
+    for (j = 0; j < 4; j++) {
+      for (m = 0; m < 4; m++) t[m] = x[(5*j+4*m)%16];
+      t[1] ^= L32((t[0]+t[3])|0, 7);
+      t[2] ^= L32((t[1]+t[0])|0, 9);
+      t[3] ^= L32((t[2]+t[1])|0,13);
+      t[0] ^= L32((t[3]+t[2])|0,18);
+      for (m = 0; m < 4; m++) w[4*j+(j+m)%4] = t[m];
+    }
+    for (m = 0; m < 16; m++) x[m] = w[m];
+  }
+
+  if (h) {
+    for (i = 0; i < 16; i++) x[i] = (x[i] + y[i]) | 0;
+    for (i = 0; i < 4; i++) {
+      x[5*i] = (x[5*i] - ld32(c, 4*i)) | 0;
+      x[6+i] = (x[6+i] - ld32(inp, 4*i)) | 0;
+    }
+    for (i = 0; i < 4; i++) {
+      st32(out,4*i,x[5*i]);
+      st32(out,16+4*i,x[6+i]);
+    }
+  } else {
+    for (i = 0; i < 16; i++) st32(out, 4 * i, (x[i] + y[i]) | 0);
+  }
+}
+
+function crypto_core_salsa20(out,inp,k,c) {
+  core(out,inp,k,c,false);
+  return 0;
+}
+
+function crypto_core_hsalsa20(out,inp,k,c) {
+  core(out,inp,k,c,true);
+  return 0;
+}
+
+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;
+  if (!b) return 0;
+  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?m[mpos+i]:0) ^ 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 (m) mpos += 64;
+  }
+  if (b > 0) {
+    crypto_core_salsa20(x,z,k,sigma);
+    for (i = 0; i < b; i++) c[cpos+i] = (m?m[mpos+i]:0) ^ x[i];
+  }
+  return 0;
+}
+
+function crypto_stream_salsa20(c,cpos,d,n,k) {
+  return crypto_stream_salsa20_xor(c,cpos,null,0,d,n,k);
+}
+
+function crypto_stream(c,cpos,d,n,k) {
+  var s = new Uint8Array(32);
+  crypto_core_hsalsa20(s,n,k,sigma);
+  return crypto_stream_salsa20(c,cpos,d,n.subarray(16),s);
+}
+
+function crypto_stream_xor(c,cpos,m,mpos,d,n,k) {
+  var s = new Uint8Array(32);
+  crypto_core_hsalsa20(s,n,k,sigma);
+  return crypto_stream_salsa20_xor(c,cpos,m,mpos,d,n.subarray(16),s);
+}
+
+function add1305(h, c) {
+  var j, u = 0;
+  for (j = 0; j < 17; j++) {
+    u = (u + ((h[j] + c[j]) | 0)) | 0;
+    h[j] = u & 255;
+    u >>>= 8;
+  }
+}
+
+var minusp = new Uint32Array([
+  5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 252
+]);
+
+function crypto_onetimeauth(out, outpos, m, mpos, n, k) {
+  var s, i, j, u;
+  var x = new Uint32Array(17), r = new Uint32Array(17),
+      h = new Uint32Array(17), c = new Uint32Array(17),
+      g = new Uint32Array(17);
+  for (j = 0; j < 17; j++) r[j]=h[j]=0;
+  for (j = 0; j < 16; j++) r[j]=k[j];
+  r[3]&=15;
+  r[4]&=252;
+  r[7]&=15;
+  r[8]&=252;
+  r[11]&=15;
+  r[12]&=252;
+  r[15]&=15;
+
+  while (n > 0) {
+    for (j = 0; j < 17; j++) c[j] = 0;
+    for (j = 0; (j < 16) && (j < n); ++j) c[j] = m[mpos+j];
+    c[j] = 1;
+    mpos += j; n -= j;
+    add1305(h,c);
+    for (i = 0; i < 17; i++) {
+      x[i] = 0;
+      for (j = 0; j < 17; j++) x[i] = (x[i] + (h[j] * ((j <= i) ? r[i - j] : ((320 * r[i + 17 - j])|0))) | 0) | 0;
+    }
+    for (i = 0; i < 17; i++) h[i] = x[i];
+    u = 0;
+    for (j = 0; j < 16; j++) {
+      u = (u + h[j]) | 0;
+      h[j] = u & 255;
+      u >>>= 8;
+    }
+    u = (u + h[16]) | 0; h[16] = u & 3;
+    u = (5 * (u >>> 2)) | 0;
+    for (j = 0; j < 16; j++) {
+      u = (u + h[j]) | 0;
+      h[j] = u & 255;
+      u >>>= 8;
+    }
+    u = (u + h[16]) | 0; h[16] = u;
+  }
+
+  for (j = 0; j < 17; j++) g[j] = h[j];
+  add1305(h,minusp);
+  s = (-(h[16] >>> 7) | 0);
+  for (j = 0; j < 17; j++) h[j] ^= s & (g[j] ^ h[j]);
+
+  for (j = 0; j < 16; j++) c[j] = k[j + 16];
+  c[16] = 0;
+  add1305(h,c);
+  for (j = 0; j < 16; j++) out[outpos+j] = h[j];
+  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 c;
+  var i;
+  for (i = 0; i < 16; i++) {
+      o[i] += 65536;
+      c = Math.floor(o[i] / 65536);
+      o[(i+1)*(i<15?1:0)] += c - 1 + 37 * (c-1) * (i===15?1:0);
+      o[i] -= (c * 65536);
+  }
+}
+
+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) {
+  var i;
+  for (i = 0; i < 16; i++) o[i] = (a[i] + b[i])|0;
+}
+
+function Z(o, a, b) {
+  var i;
+  for (i = 0; i < 16; i++) o[i] = (a[i] - b[i])|0;
+}
+
+function M(o, a, b) {
+  var i, j, t = new Float64Array(31);
+  for (i = 0; i < 31; i++) t[i] = 0;
+  for (i = 0; i < 16; i++) {
+    for (j = 0; j < 16; j++) {
+      t[i+j] += a[i] * b[j];
+    }
+  }
+  for (i = 0; i < 15; i++) {
+    t[i] += 38 * t[i+16];
+  }
+  for (i = 0; i < 16; i++) o[i] = t[i];
+  car25519(o);
+  car25519(o);
+}
+
+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) {
+  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);
+}
+
+function add64() {
+  var a = 0, b = 0, c = 0, d = 0, m16 = 65535, l, h, i;
+  for (i = 0; i < arguments.length; i++) {
+    l = arguments[i].lo;
+    h = arguments[i].hi;
+    a += (l & m16); b += (l >>> 16);
+    c += (h & m16); d += (h >>> 16);
+  }
+
+  b += (a >>> 16);
+  c += (b >>> 16);
+  d += (c >>> 16);
+
+  return new u64((c & m16) | (d << 16), (a & m16) | (b << 16));
+}
+
+function shr64(x, c) {
+  return new u64((x.hi >>> c), (x.lo >>> c) | (x.hi << (32 - c)));
+}
+
+function xor64() {
+  var l = 0, h = 0, i;
+  for (i = 0; i < arguments.length; i++) {
+    l ^= arguments[i].lo;
+    h ^= arguments[i].hi;
+  }
+  return new u64(h, l);
+}
+
+function R(x, c) {
+  var h, l, c1 = 32 - c;
+  if (c < 32) {
+    h = (x.hi >>> c) | (x.lo << c1);
+    l = (x.lo >>> c) | (x.hi << c1);
+  } else if (c < 64) {
+    h = (x.lo >>> c) | (x.hi << c1);
+    l = (x.hi >>> c) | (x.lo << c1);
+  }
+  return new u64(h, l);
+}
+
+function Ch(x, y, z) {
+  var h = (x.hi & y.hi) ^ (~x.hi & z.hi),
+      l = (x.lo & y.lo) ^ (~x.lo & z.lo);
+  return new u64(h, l);
+}
+
+function Maj(x, y, z) {
+  var h = (x.hi & y.hi) ^ (x.hi & z.hi) ^ (y.hi & z.hi),
+      l = (x.lo & y.lo) ^ (x.lo & z.lo) ^ (y.lo & z.lo);
+  return new u64(h, l);
+}
+
+function Sigma0(x) { return xor64(R(x,28), R(x,34), R(x,39)); }
+function Sigma1(x) { return xor64(R(x,14), R(x,18), R(x,41)); }
+function sigma0(x) { return xor64(R(x, 1), R(x, 8), shr64(x,7)); }
+function sigma1(x) { return xor64(R(x,19), R(x,61), shr64(x,6)); }
+
+var K = [
+  new u64(0x428a2f98, 0xd728ae22), new u64(0x71374491, 0x23ef65cd),
+  new u64(0xb5c0fbcf, 0xec4d3b2f), new u64(0xe9b5dba5, 0x8189dbbc),
+  new u64(0x3956c25b, 0xf348b538), new u64(0x59f111f1, 0xb605d019),
+  new u64(0x923f82a4, 0xaf194f9b), new u64(0xab1c5ed5, 0xda6d8118),
+  new u64(0xd807aa98, 0xa3030242), new u64(0x12835b01, 0x45706fbe),
+  new u64(0x243185be, 0x4ee4b28c), new u64(0x550c7dc3, 0xd5ffb4e2),
+  new u64(0x72be5d74, 0xf27b896f), new u64(0x80deb1fe, 0x3b1696b1),
+  new u64(0x9bdc06a7, 0x25c71235), new u64(0xc19bf174, 0xcf692694),
+  new u64(0xe49b69c1, 0x9ef14ad2), new u64(0xefbe4786, 0x384f25e3),
+  new u64(0x0fc19dc6, 0x8b8cd5b5), new u64(0x240ca1cc, 0x77ac9c65),
+  new u64(0x2de92c6f, 0x592b0275), new u64(0x4a7484aa, 0x6ea6e483),
+  new u64(0x5cb0a9dc, 0xbd41fbd4), new u64(0x76f988da, 0x831153b5),
+  new u64(0x983e5152, 0xee66dfab), new u64(0xa831c66d, 0x2db43210),
+  new u64(0xb00327c8, 0x98fb213f), new u64(0xbf597fc7, 0xbeef0ee4),
+  new u64(0xc6e00bf3, 0x3da88fc2), new u64(0xd5a79147, 0x930aa725),
+  new u64(0x06ca6351, 0xe003826f), new u64(0x14292967, 0x0a0e6e70),
+  new u64(0x27b70a85, 0x46d22ffc), new u64(0x2e1b2138, 0x5c26c926),
+  new u64(0x4d2c6dfc, 0x5ac42aed), new u64(0x53380d13, 0x9d95b3df),
+  new u64(0x650a7354, 0x8baf63de), new u64(0x766a0abb, 0x3c77b2a8),
+  new u64(0x81c2c92e, 0x47edaee6), new u64(0x92722c85, 0x1482353b),
+  new u64(0xa2bfe8a1, 0x4cf10364), new u64(0xa81a664b, 0xbc423001),
+  new u64(0xc24b8b70, 0xd0f89791), new u64(0xc76c51a3, 0x0654be30),
+  new u64(0xd192e819, 0xd6ef5218), new u64(0xd6990624, 0x5565a910),
+  new u64(0xf40e3585, 0x5771202a), new u64(0x106aa070, 0x32bbd1b8),
+  new u64(0x19a4c116, 0xb8d2d0c8), new u64(0x1e376c08, 0x5141ab53),
+  new u64(0x2748774c, 0xdf8eeb99), new u64(0x34b0bcb5, 0xe19b48a8),
+  new u64(0x391c0cb3, 0xc5c95a63), new u64(0x4ed8aa4a, 0xe3418acb),
+  new u64(0x5b9cca4f, 0x7763e373), new u64(0x682e6ff3, 0xd6b2b8a3),
+  new u64(0x748f82ee, 0x5defb2fc), new u64(0x78a5636f, 0x43172f60),
+  new u64(0x84c87814, 0xa1f0ab72), new u64(0x8cc70208, 0x1a6439ec),
+  new u64(0x90befffa, 0x23631e28), new u64(0xa4506ceb, 0xde82bde9),
+  new u64(0xbef9a3f7, 0xb2c67915), new u64(0xc67178f2, 0xe372532b),
+  new u64(0xca273ece, 0xea26619c), new u64(0xd186b8c7, 0x21c0c207),
+  new u64(0xeada7dd6, 0xcde0eb1e), new u64(0xf57d4f7f, 0xee6ed178),
+  new u64(0x06f067aa, 0x72176fba), new u64(0x0a637dc5, 0xa2c898a6),
+  new u64(0x113f9804, 0xbef90dae), new u64(0x1b710b35, 0x131c471b),
+  new u64(0x28db77f5, 0x23047d84), new u64(0x32caab7b, 0x40c72493),
+  new u64(0x3c9ebe0a, 0x15c9bebc), new u64(0x431d67c4, 0x9c100d4c),
+  new u64(0x4cc5d4be, 0xcb3e42b6), new u64(0x597f299c, 0xfc657e2a),
+  new u64(0x5fcb6fab, 0x3ad6faec), new u64(0x6c44198c, 0x4a475817)
+];
+
+function crypto_hashblocks(x, m, n) {
+  var z = [], b = [], a = [], w = [], t, i, j;
+
+  for (i = 0; i < 8; i++) z[i] = a[i] = dl64(x, 8*i);
+
+  var pos = 0;
+  while (n >= 128) {
+    for (i = 0; i < 16; i++) w[i] = dl64(m, 8*i+pos);
+    for (i = 0; i < 80; i++) {
+      for (j = 0; j < 8; j++) b[j] = a[j];
+      t = add64(a[7], Sigma1(a[4]), Ch(a[4], a[5], a[6]), K[i], w[i%16]);
+      b[7] = add64(t, Sigma0(a[0]), Maj(a[0], a[1], a[2]));
+      b[3] = add64(b[3], t);
+      for (j = 0; j < 8; j++) a[(j+1)%8] = b[j];
+      if (i%16 === 15) {
+        for (j = 0; j < 16; j++) {
+          w[j] = add64(w[j], w[(j+9)%16], sigma0(w[(j+1)%16]), sigma1(w[(j+14)%16]));
+        }
+      }
+    }
+
+    for (i = 0; i < 8; i++) {
+      a[i] = add64(a[i], z[i]);
+      z[i] = a[i];
+    }
+
+    pos += 128;
+    n -= 128;
+  }
+
+  for (i = 0; i < 8; i++) ts64(x, 8*i, z[i]);
+  return n;
+}
+
+var iv = new Uint8Array([
+  0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08,
+  0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b,
+  0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b,
+  0xa5,0x4f,0xf5,0x3a,0x5f,0x1d,0x36,0xf1,
+  0x51,0x0e,0x52,0x7f,0xad,0xe6,0x82,0xd1,
+  0x9b,0x05,0x68,0x8c,0x2b,0x3e,0x6c,0x1f,
+  0x1f,0x83,0xd9,0xab,0xfb,0x41,0xbd,0x6b,
+  0x5b,0xe0,0xcd,0x19,0x13,0x7e,0x21,0x79
+]);
+
+function crypto_hash(out, m, n) {
+  var h = new Uint8Array(64), x = new Uint8Array(256);
+  var i, b = n;
+
+  for (i = 0; i < 64; i++) h[i] = iv[i];
+
+  crypto_hashblocks(h, m, n);
+  n %= 128;
+
+  for (i = 0; i < 256; i++) x[i] = 0;
+  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, new u64((b / 0x20000000) | 0, b << 3));
+  crypto_hashblocks(h, x, n);
+
+  for (i = 0; i < 64; i++) out[i] = h[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) {
+  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;
+}
+
+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, n, sk) {
+  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 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(m, sm, n, pk) {
+  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 -1;
+
+  if (unpackneg(q, pk)) return -1;
+
+  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 -1;
+  }
+
+  for (i = 0; i < n; i++) m[i] = sm[i + 64];
+  mlen = n;
+  return mlen;
+}
+
+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.lowlevel = {
+  crypto_core_hsalsa20: crypto_core_hsalsa20,
+  crypto_stream_xor: crypto_stream_xor,
+  crypto_stream: crypto_stream,
+  crypto_stream_salsa20_xor: crypto_stream_salsa20_xor,
+  crypto_stream_salsa20: crypto_stream_salsa20,
+  crypto_onetimeauth: crypto_onetimeauth,
+  crypto_onetimeauth_verify: crypto_onetimeauth_verify,
+  crypto_verify_16: crypto_verify_16,
+  crypto_verify_32: crypto_verify_32,
+  crypto_secretbox: crypto_secretbox,
+  crypto_secretbox_open: crypto_secretbox_open,
+  crypto_scalarmult: crypto_scalarmult,
+  crypto_scalarmult_base: crypto_scalarmult_base,
+  crypto_box_beforenm: crypto_box_beforenm,
+  crypto_box_afternm: crypto_box_afternm,
+  crypto_box: crypto_box,
+  crypto_box_open: crypto_box_open,
+  crypto_box_keypair: crypto_box_keypair,
+  crypto_hash: crypto_hash,
+  crypto_sign: crypto_sign,
+  crypto_sign_keypair: crypto_sign_keypair,
+  crypto_sign_open: crypto_sign_open,
+
+  crypto_secretbox_KEYBYTES: crypto_secretbox_KEYBYTES,
+  crypto_secretbox_NONCEBYTES: crypto_secretbox_NONCEBYTES,
+  crypto_secretbox_ZEROBYTES: crypto_secretbox_ZEROBYTES,
+  crypto_secretbox_BOXZEROBYTES: crypto_secretbox_BOXZEROBYTES,
+  crypto_scalarmult_BYTES: crypto_scalarmult_BYTES,
+  crypto_scalarmult_SCALARBYTES: crypto_scalarmult_SCALARBYTES,
+  crypto_box_PUBLICKEYBYTES: crypto_box_PUBLICKEYBYTES,
+  crypto_box_SECRETKEYBYTES: crypto_box_SECRETKEYBYTES,
+  crypto_box_BEFORENMBYTES: crypto_box_BEFORENMBYTES,
+  crypto_box_NONCEBYTES: crypto_box_NONCEBYTES,
+  crypto_box_ZEROBYTES: crypto_box_ZEROBYTES,
+  crypto_box_BOXZEROBYTES: crypto_box_BOXZEROBYTES,
+  crypto_sign_BYTES: crypto_sign_BYTES,
+  crypto_sign_PUBLICKEYBYTES: crypto_sign_PUBLICKEYBYTES,
+  crypto_sign_SECRETKEYBYTES: crypto_sign_SECRETKEYBYTES,
+  crypto_sign_SEEDBYTES: crypto_sign_SEEDBYTES,
+  crypto_hash_BYTES: crypto_hash_BYTES
+};
+
+/* High-level API */
+
+function checkLengths(k, n) {
+  if (k.length !== crypto_secretbox_KEYBYTES) throw new Error('bad key size');
+  if (n.length !== crypto_secretbox_NONCEBYTES) throw new Error('bad nonce size');
+}
+
+function checkBoxLengths(pk, sk) {
+  if (pk.length !== crypto_box_PUBLICKEYBYTES) throw new Error('bad public key size');
+  if (sk.length !== crypto_box_SECRETKEYBYTES) throw new Error('bad secret key size');
+}
+
+function checkArrayTypes() {
+  var t, i;
+  for (i = 0; i < arguments.length; i++) {
+     if ((t = Object.prototype.toString.call(arguments[i])) !== '[object Uint8Array]')
+       throw new TypeError('unexpected type ' + t + ', use Uint8Array');
+  }
+}
+
+function cleanup(arr) {
+  for (var i = 0; i < arr.length; i++) arr[i] = 0;
+}
+
+// TODO: Completely remove this in v0.15.
+if (!nacl.util) {
+  nacl.util = {};
+  nacl.util.decodeUTF8 = nacl.util.encodeUTF8 = nacl.util.encodeBase64 = nacl.util.decodeBase64 = function() {
+    throw new Error('nacl.util moved into separate package: https://github.com/dchest/tweetnacl-util-js');
+  };
+}
+
+nacl.randomBytes = function(n) {
+  var b = new Uint8Array(n);
+  randombytes(b, n);
+  return b;
+};
+
+nacl.secretbox = function(msg, nonce, key) {
+  checkArrayTypes(msg, nonce, key);
+  checkLengths(key, nonce);
+  var m = new Uint8Array(crypto_secretbox_ZEROBYTES + msg.length);
+  var c = new Uint8Array(m.length);
+  for (var i = 0; i < msg.length; i++) m[i+crypto_secretbox_ZEROBYTES] = msg[i];
+  crypto_secretbox(c, m, m.length, nonce, key);
+  return c.subarray(crypto_secretbox_BOXZEROBYTES);
+};
+
+nacl.secretbox.open = function(box, nonce, key) {
+  checkArrayTypes(box, nonce, key);
+  checkLengths(key, nonce);
+  var c = new Uint8Array(crypto_secretbox_BOXZEROBYTES + box.length);
+  var m = new Uint8Array(c.length);
+  for (var 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, nonce, key) !== 0) return false;
+  return m.subarray(crypto_secretbox_ZEROBYTES);
+};
+
+nacl.secretbox.keyLength = crypto_secretbox_KEYBYTES;
+nacl.secretbox.nonceLength = crypto_secretbox_NONCEBYTES;
+nacl.secretbox.overheadLength = crypto_secretbox_BOXZEROBYTES;
+
+nacl.scalarMult = function(n, p) {
+  checkArrayTypes(n, p);
+  if (n.length !== crypto_scalarmult_SCALARBYTES) throw new Error('bad n size');
+  if (p.length !== crypto_scalarmult_BYTES) throw new Error('bad p size');
+  var q = new Uint8Array(crypto_scalarmult_BYTES);
+  crypto_scalarmult(q, n, p);
+  return q;
+};
+
+nacl.scalarMult.base = function(n) {
+  checkArrayTypes(n);
+  if (n.length !== crypto_scalarmult_SCALARBYTES) throw new Error('bad n size');
+  var q = new Uint8Array(crypto_scalarmult_BYTES);
+  crypto_scalarmult_base(q, n);
+  return q;
+};
+
+nacl.scalarMult.scalarLength = crypto_scalarmult_SCALARBYTES;
+nacl.scalarMult.groupElementLength = crypto_scalarmult_BYTES;
+
+nacl.box = function(msg, nonce, publicKey, secretKey) {
+  var k = nacl.box.before(publicKey, secretKey);
+  return nacl.secretbox(msg, nonce, k);
+};
+
+nacl.box.before = function(publicKey, secretKey) {
+  checkArrayTypes(publicKey, secretKey);
+  checkBoxLengths(publicKey, secretKey);
+  var k = new Uint8Array(crypto_box_BEFORENMBYTES);
+  crypto_box_beforenm(k, publicKey, secretKey);
+  return k;
+};
+
+nacl.box.after = nacl.secretbox;
+
+nacl.box.open = function(msg, nonce, publicKey, secretKey) {
+  var k = nacl.box.before(publicKey, secretKey);
+  return nacl.secretbox.open(msg, nonce, k);
+};
+
+nacl.box.open.after = nacl.secretbox.open;
+
+nacl.box.keyPair = function() {
+  var pk = new Uint8Array(crypto_box_PUBLICKEYBYTES);
+  var sk = new Uint8Array(crypto_box_SECRETKEYBYTES);
+  crypto_box_keypair(pk, sk);
+  return {publicKey: pk, secretKey: sk};
+};
+
+nacl.box.keyPair.fromSecretKey = function(secretKey) {
+  checkArrayTypes(secretKey);
+  if (secretKey.length !== crypto_box_SECRETKEYBYTES)
+    throw new Error('bad secret key size');
+  var pk = new Uint8Array(crypto_box_PUBLICKEYBYTES);
+  crypto_scalarmult_base(pk, secretKey);
+  return {publicKey: pk, secretKey: new Uint8Array(secretKey)};
+};
+
+nacl.box.publicKeyLength = crypto_box_PUBLICKEYBYTES;
+nacl.box.secretKeyLength = crypto_box_SECRETKEYBYTES;
+nacl.box.sharedKeyLength = crypto_box_BEFORENMBYTES;
+nacl.box.nonceLength = crypto_box_NONCEBYTES;
+nacl.box.overheadLength = nacl.secretbox.overheadLength;
+
+nacl.sign = function(msg, secretKey) {
+  checkArrayTypes(msg, secretKey);
+  if (secretKey.length !== crypto_sign_SECRETKEYBYTES)
+    throw new Error('bad secret key size');
+  var signedMsg = new Uint8Array(crypto_sign_BYTES+msg.length);
+  crypto_sign(signedMsg, msg, msg.length, secretKey);
+  return signedMsg;
+};
+
+nacl.sign.open = function(signedMsg, publicKey) {
+  if (arguments.length !== 2)
+    throw new Error('nacl.sign.open accepts 2 arguments; did you mean to use nacl.sign.detached.verify?');
+  checkArrayTypes(signedMsg, publicKey);
+  if (publicKey.length !== crypto_sign_PUBLICKEYBYTES)
+    throw new Error('bad public key size');
+  var tmp = new Uint8Array(signedMsg.length);
+  var mlen = crypto_sign_open(tmp, signedMsg, signedMsg.length, publicKey);
+  if (mlen < 0) return null;
+  var m = new Uint8Array(mlen);
+  for (var i = 0; i < m.length; i++) m[i] = tmp[i];
+  return m;
+};
+
+nacl.sign.detached = function(msg, secretKey) {
+  var signedMsg = nacl.sign(msg, secretKey);
+  var sig = new Uint8Array(crypto_sign_BYTES);
+  for (var i = 0; i < sig.length; i++) sig[i] = signedMsg[i];
+  return sig;
+};
+
+nacl.sign.detached.verify = function(msg, sig, publicKey) {
+  checkArrayTypes(msg, sig, publicKey);
+  if (sig.length !== crypto_sign_BYTES)
+    throw new Error('bad signature size');
+  if (publicKey.length !== crypto_sign_PUBLICKEYBYTES)
+    throw new Error('bad public key size');
+  var sm = new Uint8Array(crypto_sign_BYTES + msg.length);
+  var m = new Uint8Array(crypto_sign_BYTES + msg.length);
+  var i;
+  for (i = 0; i < crypto_sign_BYTES; i++) sm[i] = sig[i];
+  for (i = 0; i < msg.length; i++) sm[i+crypto_sign_BYTES] = msg[i];
+  return (crypto_sign_open(m, sm, sm.length, publicKey) >= 0);
+};
+
+nacl.sign.keyPair = function() {
+  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
+  var sk = new Uint8Array(crypto_sign_SECRETKEYBYTES);
+  crypto_sign_keypair(pk, sk);
+  return {publicKey: pk, secretKey: sk};
+};
+
+nacl.sign.keyPair.fromSecretKey = function(secretKey) {
+  checkArrayTypes(secretKey);
+  if (secretKey.length !== crypto_sign_SECRETKEYBYTES)
+    throw new Error('bad secret key size');
+  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
+  for (var i = 0; i < pk.length; i++) pk[i] = secretKey[32+i];
+  return {publicKey: pk, secretKey: new Uint8Array(secretKey)};
+};
+
+nacl.sign.keyPair.fromSeed = function(seed) {
+  checkArrayTypes(seed);
+  if (seed.length !== crypto_sign_SEEDBYTES)
+    throw new Error('bad seed size');
+  var pk = new Uint8Array(crypto_sign_PUBLICKEYBYTES);
+  var sk = new Uint8Array(crypto_sign_SECRETKEYBYTES);
+  for (var i = 0; i < 32; i++) sk[i] = seed[i];
+  crypto_sign_keypair(pk, sk, true);
+  return {publicKey: pk, secretKey: sk};
+};
+
+nacl.sign.publicKeyLength = crypto_sign_PUBLICKEYBYTES;
+nacl.sign.secretKeyLength = crypto_sign_SECRETKEYBYTES;
+nacl.sign.seedLength = crypto_sign_SEEDBYTES;
+nacl.sign.signatureLength = crypto_sign_BYTES;
+
+nacl.hash = function(msg) {
+  checkArrayTypes(msg);
+  var h = new Uint8Array(crypto_hash_BYTES);
+  crypto_hash(h, msg, msg.length);
+  return h;
+};
+
+nacl.hash.hashLength = crypto_hash_BYTES;
+
+nacl.verify = function(x, y) {
+  checkArrayTypes(x, y);
+  // Zero length arguments are considered not equal.
+  if (x.length === 0 || y.length === 0) return false;
+  if (x.length !== y.length) return false;
+  return (vn(x, 0, y, 0, x.length) === 0) ? true : false;
+};
+
+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('crypto');
+    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);
+      });
+    }
+  }
+})();
+
+})(typeof module !== 'undefined' && module.exports ? module.exports : (self.nacl = self.nacl || {}));