aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/contrib/examples/keygen-html/wireguard.js
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/examples/keygen-html/wireguard.js')
-rw-r--r--contrib/examples/keygen-html/wireguard.js184
1 files changed, 184 insertions, 0 deletions
diff --git a/contrib/examples/keygen-html/wireguard.js b/contrib/examples/keygen-html/wireguard.js
new file mode 100644
index 0000000..e96da3e
--- /dev/null
+++ b/contrib/examples/keygen-html/wireguard.js
@@ -0,0 +1,184 @@
+/*! SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+(function() {
+ function gf(init) {
+ var r = new Float64Array(16);
+ if (init) {
+ for (var i = 0; i < init.length; ++i)
+ r[i] = init[i];
+ }
+ return r;
+ }
+
+ function pack(o, n) {
+ var b, m = gf(), t = gf();
+ for (var i = 0; i < 16; ++i)
+ t[i] = n[i];
+ carry(t);
+ carry(t);
+ carry(t);
+ for (var j = 0; j < 2; ++j) {
+ m[0] = t[0] - 0xffed;
+ for (var 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;
+ cswap(t, m, 1 - b);
+ }
+ for (var i = 0; i < 16; ++i) {
+ o[2 * i] = t[i] & 0xff;
+ o[2 * i + 1] = t[i] >> 8;
+ }
+ }
+
+ function carry(o) {
+ var c;
+ for (var i = 0; i < 16; ++i) {
+ o[(i + 1) % 16] += (i < 15 ? 1 : 38) * Math.floor(o[i] / 65536);
+ o[i] &= 0xffff;
+ }
+ }
+
+ function cswap(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 add(o, a, b) {
+ for (var i = 0; i < 16; ++i)
+ o[i] = (a[i] + b[i]) | 0;
+ }
+
+ function subtract(o, a, b) {
+ for (var i = 0; i < 16; ++i)
+ o[i] = (a[i] - b[i]) | 0;
+ }
+
+ function multmod(o, a, b) {
+ var t = new Float64Array(31);
+ for (var i = 0; i < 16; ++i) {
+ for (var j = 0; j < 16; ++j)
+ t[i + j] += a[i] * b[j];
+ }
+ for (var i = 0; i < 15; ++i)
+ t[i] += 38 * t[i + 16];
+ for (var i = 0; i < 16; ++i)
+ o[i] = t[i];
+ carry(o);
+ carry(o);
+ }
+
+ function invert(o, i) {
+ var c = gf();
+ for (var a = 0; a < 16; ++a)
+ c[a] = i[a];
+ for (var a = 253; a >= 0; --a) {
+ multmod(c, c, c);
+ if (a !== 2 && a !== 4)
+ multmod(c, c, i);
+ }
+ for (var a = 0; a < 16; ++a)
+ o[a] = c[a];
+ }
+
+ function normalizeKey(z) {
+ z[31] = (z[31] & 127) | 64;
+ z[0] &= 248;
+ }
+
+ function generatePublicKey(privateKey) {
+ var r, z = new Uint8Array(32);
+ var a = gf([1]),
+ b = gf([9]),
+ c = gf(),
+ d = gf([1]),
+ e = gf(),
+ f = gf(),
+ _121665 = gf([0xdb41, 1]),
+ _9 = gf([9]);
+ for (var i = 0; i < 32; ++i)
+ z[i] = privateKey[i];
+ normalizeKey(z);
+ for (var i = 254; i >= 0; --i) {
+ r = (z[i >>> 3] >>> (i & 7)) & 1;
+ cswap(a, b, r);
+ cswap(c, d, r);
+ add(e, a, c);
+ subtract(a, a, c);
+ add(c, b, d);
+ subtract(b, b, d);
+ multmod(d, e, e);
+ multmod(f, a, a);
+ multmod(a, c, a);
+ multmod(c, b, e);
+ add(e, a, c);
+ subtract(a, a, c);
+ multmod(b, a, a);
+ subtract(c, d, f);
+ multmod(a, c, _121665);
+ add(a, a, d);
+ multmod(c, c, a);
+ multmod(a, d, f);
+ multmod(d, b, _9);
+ multmod(b, e, e);
+ cswap(a, b, r);
+ cswap(c, d, r);
+ }
+ invert(c, c);
+ multmod(a, a, c);
+ pack(z, a);
+ return z;
+ }
+
+ function generatePresharedKey() {
+ var privateKey = new Uint8Array(32);
+ window.crypto.getRandomValues(privateKey);
+ return privateKey;
+ }
+
+ function generatePrivateKey() {
+ var privateKey = generatePresharedKey();
+ normalizeKey(privateKey);
+ return privateKey;
+ }
+
+ function encodeBase64(dest, src) {
+ var input = Uint8Array.from([(src[0] >> 2) & 63, ((src[0] << 4) | (src[1] >> 4)) & 63, ((src[1] << 2) | (src[2] >> 6)) & 63, src[2] & 63]);
+ for (var i = 0; i < 4; ++i)
+ dest[i] = input[i] + 65 +
+ (((25 - input[i]) >> 8) & 6) -
+ (((51 - input[i]) >> 8) & 75) -
+ (((61 - input[i]) >> 8) & 15) +
+ (((62 - input[i]) >> 8) & 3);
+ }
+
+ function keyToBase64(key) {
+ var i, base64 = new Uint8Array(44);
+ for (i = 0; i < 32 / 3; ++i)
+ encodeBase64(base64.subarray(i * 4), key.subarray(i * 3));
+ encodeBase64(base64.subarray(i * 4), Uint8Array.from([key[i * 3 + 0], key[i * 3 + 1], 0]));
+ base64[43] = 61;
+ return String.fromCharCode.apply(null, base64);
+ }
+
+ window.wireguard = {
+ generateKeypair: function() {
+ var privateKey = generatePrivateKey();
+ var publicKey = generatePublicKey(privateKey);
+ return {
+ publicKey: keyToBase64(publicKey),
+ privateKey: keyToBase64(privateKey)
+ };
+ }
+ };
+})();