lint

src/utils/diffie-hellman/ed2curve.js

@@ -5,23 +5,22 @@
  * Written by Dmitry Chestnykh in 2014. Public domain.
  */
 /* jshint newcap: false */
-;(function (root, f) {
+(function (root, f) {
-  'use strict'
   // eslint-disable-next-line @typescript-eslint/no-var-requires
-  if (typeof module !== 'undefined' && module.exports) module.exports = f(require('tweetnacl'))
+  if (typeof module !== 'undefined' && module.exports)
-  else root.ed2curve = f(root.nacl)
+    module.exports = f(require('tweetnacl'));
+  else root.ed2curve = f(root.nacl);
 })(this, function (nacl) {
-  'use strict'
+  if (!nacl) throw new Error('tweetnacl not loaded');
-  if (!nacl) throw new Error('tweetnacl not loaded')
 
   // -- Operations copied from TweetNaCl.js. --
 
   var gf = function (init) {
     var i,
-      r = new Float64Array(16)
+      r = new Float64Array(16);
-    if (init) for (i = 0; i < init.length; i++) r[i] = init[i]
+    if (init) for (i = 0; i < init.length; i++) r[i] = init[i];
-    return r
+    return r;
-  }
+  };
 
   var gf0 = gf(),
     gf1 = gf([1]),
@@ -60,147 +59,148 @@
       0x4fc1,
       0x2480,
       0x2b83,
-    ])
+    ]);
 
   function car25519(o) {
-    var c
+    var c;
-    var i
+    var i;
     for (i = 0; i < 16; i++) {
-      o[i] += 65536
+      o[i] += 65536;
-      c = Math.floor(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 + 1) * (i < 15 ? 1 : 0)] +=
-      o[i] -= c * 65536
+        c - 1 + 37 * (c - 1) * (i === 15 ? 1 : 0);
+      o[i] -= c * 65536;
     }
   }
 
   function sel25519(p, q, b) {
     var t,
-      c = ~(b - 1)
+      c = ~(b - 1);
     for (var i = 0; i < 16; i++) {
-      t = c & (p[i] ^ q[i])
+      t = c & (p[i] ^ q[i]);
-      p[i] ^= t
+      p[i] ^= t;
-      q[i] ^= t
+      q[i] ^= t;
     }
   }
 
   function unpack25519(o, n) {
-    var i
+    var i;
-    for (i = 0; i < 16; i++) o[i] = n[2 * i] + (n[2 * i + 1] << 8)
+    for (i = 0; i < 16; i++) o[i] = n[2 * i] + (n[2 * i + 1] << 8);
-    o[15] &= 0x7fff
+    o[15] &= 0x7fff;
   }
 
   // addition
   function A(o, a, b) {
-    var i
+    var i;
-    for (i = 0; i < 16; i++) o[i] = (a[i] + b[i]) | 0
+    for (i = 0; i < 16; i++) o[i] = (a[i] + b[i]) | 0;
   }
 
   // subtraction
   function Z(o, a, b) {
-    var i
+    var i;
-    for (i = 0; i < 16; i++) o[i] = (a[i] - b[i]) | 0
+    for (i = 0; i < 16; i++) o[i] = (a[i] - b[i]) | 0;
   }
 
   // multiplication
   function M(o, a, b) {
     var i,
       j,
-      t = new Float64Array(31)
+      t = new Float64Array(31);
-    for (i = 0; i < 31; i++) t[i] = 0
+    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]
+        t[i + j] += a[i] * b[j];
       }
     }
     for (i = 0; i < 15; i++) {
-      t[i] += 38 * t[i + 16]
+      t[i] += 38 * t[i + 16];
     }
-    for (i = 0; i < 16; i++) o[i] = t[i]
+    for (i = 0; i < 16; i++) o[i] = t[i];
-    car25519(o)
+    car25519(o);
-    car25519(o)
+    car25519(o);
   }
 
   // squaring
   function S(o, a) {
-    M(o, a, a)
+    M(o, a, a);
   }
 
   // inversion
   function inv25519(o, i) {
-    var c = gf()
+    var c = gf();
-    var a
+    var a;
-    for (a = 0; a < 16; a++) c[a] = i[a]
+    for (a = 0; a < 16; a++) c[a] = i[a];
     for (a = 253; a >= 0; a--) {
-      S(c, c)
+      S(c, c);
-      if (a !== 2 && a !== 4) M(c, c, i)
+      if (a !== 2 && a !== 4) M(c, c, i);
     }
-    for (a = 0; a < 16; a++) o[a] = c[a]
+    for (a = 0; a < 16; a++) o[a] = c[a];
   }
 
   function pack25519(o, n) {
-    var i, j, b
+    var i, j, b;
     var m = gf(),
-      t = gf()
+      t = gf();
-    for (i = 0; i < 16; i++) t[i] = n[i]
+    for (i = 0; i < 16; i++) t[i] = n[i];
-    car25519(t)
+    car25519(t);
-    car25519(t)
+    car25519(t);
-    car25519(t)
+    car25519(t);
     for (j = 0; j < 2; j++) {
-      m[0] = t[0] - 0xffed
+      m[0] = t[0] - 0xffed;
       for (i = 1; i < 15; i++) {
-        m[i] = t[i] - 0xffff - ((m[i - 1] >> 16) & 1)
+        m[i] = t[i] - 0xffff - ((m[i - 1] >> 16) & 1);
-        m[i - 1] &= 0xffff
+        m[i - 1] &= 0xffff;
       }
-      m[15] = t[15] - 0x7fff - ((m[14] >> 16) & 1)
+      m[15] = t[15] - 0x7fff - ((m[14] >> 16) & 1);
-      b = (m[15] >> 16) & 1
+      b = (m[15] >> 16) & 1;
-      m[14] &= 0xffff
+      m[14] &= 0xffff;
-      sel25519(t, m, 1 - b)
+      sel25519(t, m, 1 - b);
     }
     for (i = 0; i < 16; i++) {
-      o[2 * i] = t[i] & 0xff
+      o[2 * i] = t[i] & 0xff;
-      o[2 * i + 1] = t[i] >> 8
+      o[2 * i + 1] = t[i] >> 8;
     }
   }
 
   function par25519(a) {
-    var d = new Uint8Array(32)
+    var d = new Uint8Array(32);
-    pack25519(d, a)
+    pack25519(d, a);
-    return d[0] & 1
+    return d[0] & 1;
   }
 
   function vn(x, xi, y, yi, n) {
     var i,
-      d = 0
+      d = 0;
-    for (i = 0; i < n; i++) d |= x[xi + i] ^ y[yi + i]
+    for (i = 0; i < n; i++) d |= x[xi + i] ^ y[yi + i];
-    return (1 & ((d - 1) >>> 8)) - 1
+    return (1 & ((d - 1) >>> 8)) - 1;
   }
 
   function crypto_verify_32(x, xi, y, yi) {
-    return vn(x, xi, y, yi, 32)
+    return vn(x, xi, y, yi, 32);
   }
 
   function neq25519(a, b) {
     var c = new Uint8Array(32),
-      d = new Uint8Array(32)
+      d = new Uint8Array(32);
-    pack25519(c, a)
+    pack25519(c, a);
-    pack25519(d, b)
+    pack25519(d, b);
-    return crypto_verify_32(c, 0, d, 0)
+    return crypto_verify_32(c, 0, d, 0);
   }
 
   function pow2523(o, i) {
-    var c = gf()
+    var c = gf();
-    var a
+    var a;
-    for (a = 0; a < 16; a++) c[a] = i[a]
+    for (a = 0; a < 16; a++) c[a] = i[a];
     for (a = 250; a >= 0; a--) {
-      S(c, c)
+      S(c, c);
-      if (a !== 1) M(c, c, i)
+      if (a !== 1) M(c, c, i);
     }
-    for (a = 0; a < 16; a++) o[a] = c[a]
+    for (a = 0; a < 16; a++) o[a] = c[a];
   }
 
   function set25519(r, a) {
-    var i
+    var i;
-    for (i = 0; i < 16; i++) r[i] = a[i] | 0
+    for (i = 0; i < 16; i++) r[i] = a[i] | 0;
   }
 
   function unpackneg(r, p) {
@@ -210,39 +210,39 @@
       den = gf(),
       den2 = gf(),
       den4 = gf(),
-      den6 = gf()
+      den6 = gf();
 
-    set25519(r[2], gf1)
+    set25519(r[2], gf1);
-    unpack25519(r[1], p)
+    unpack25519(r[1], p);
-    S(num, r[1])
+    S(num, r[1]);
-    M(den, num, D)
+    M(den, num, D);
-    Z(num, num, r[2])
+    Z(num, num, r[2]);
-    A(den, r[2], den)
+    A(den, r[2], den);
 
-    S(den2, den)
+    S(den2, den);
-    S(den4, den2)
+    S(den4, den2);
-    M(den6, den4, den2)
+    M(den6, den4, den2);
-    M(t, den6, num)
+    M(t, den6, num);
-    M(t, t, den)
+    M(t, t, den);
 
-    pow2523(t, t)
+    pow2523(t, t);
-    M(t, t, num)
+    M(t, t, num);
-    M(t, t, den)
+    M(t, t, den);
-    M(t, t, den)
+    M(t, t, den);
-    M(r[0], t, den)
+    M(r[0], t, den);
 
-    S(chk, r[0])
+    S(chk, r[0]);
-    M(chk, chk, den)
+    M(chk, chk, den);
-    if (neq25519(chk, num)) M(r[0], r[0], I)
+    if (neq25519(chk, num)) M(r[0], r[0], I);
 
-    S(chk, r[0])
+    S(chk, r[0]);
-    M(chk, chk, den)
+    M(chk, chk, den);
-    if (neq25519(chk, num)) return -1
+    if (neq25519(chk, num)) return -1;
 
-    if (par25519(r[0]) === p[31] >> 7) Z(r[0], gf0, r[0])
+    if (par25519(r[0]) === p[31] >> 7) Z(r[0], gf0, r[0]);
 
-    M(r[3], r[0], r[1])
+    M(r[3], r[0], r[1]);
-    return 0
+    return 0;
   }
 
   // ----
@@ -253,47 +253,47 @@
     var z = new Uint8Array(32),
       q = [gf(), gf(), gf(), gf()],
       a = gf(),
-      b = gf()
+      b = gf();
 
-    if (unpackneg(q, pk)) return null // reject invalid key
+    if (unpackneg(q, pk)) return null; // reject invalid key
 
-    var y = q[1]
+    var y = q[1];
 
-    A(a, gf1, y)
+    A(a, gf1, y);
-    Z(b, gf1, y)
+    Z(b, gf1, y);
-    inv25519(b, b)
+    inv25519(b, b);
-    M(a, a, b)
+    M(a, a, b);
 
-    pack25519(z, a)
+    pack25519(z, a);
-    return z
+    return z;
   }
 
   // Converts Ed25519 secret key to Curve25519 secret key.
   function convertSecretKey(sk) {
     var d = new Uint8Array(64),
       o = new Uint8Array(32),
-      i
+      i;
-    nacl.lowlevel.crypto_hash(d, sk, 32)
+    nacl.lowlevel.crypto_hash(d, sk, 32);
-    d[0] &= 248
+    d[0] &= 248;
-    d[31] &= 127
+    d[31] &= 127;
-    d[31] |= 64
+    d[31] |= 64;
-    for (i = 0; i < 32; i++) o[i] = d[i]
+    for (i = 0; i < 32; i++) o[i] = d[i];
-    for (i = 0; i < 64; i++) d[i] = 0
+    for (i = 0; i < 64; i++) d[i] = 0;
-    return o
+    return o;
   }
 
   function convertKeyPair(edKeyPair) {
-    var publicKey = convertPublicKey(edKeyPair.publicKey)
+    var publicKey = convertPublicKey(edKeyPair.publicKey);
-    if (!publicKey) return null
+    if (!publicKey) return null;
     return {
       publicKey: publicKey,
       secretKey: convertSecretKey(edKeyPair.secretKey),
-    }
+    };
   }
 
   return {
     convertPublicKey: convertPublicKey,
     convertSecretKey: convertSecretKey,
     convertKeyPair: convertKeyPair,
-  }
+  };
-})
+});