[feature] wireguard inbound

Co-Authored-By: Alireza Ahmadi <alireza7@gmail.com>

1 files changed, 187 insertions, 0 deletions

diff --git a/web/assets/js/util/utils.js b/web/assets/js/util/utils.js
index 8bab58ec..61b322bd 100644
--- a/web/assets/js/util/utils.js
+++ b/web/assets/js/util/utils.js
@@ -295,3 +295,190 @@ class ObjectUtil {
         return true;
     }
 }
+
+class Wireguard {
+	static gf(init) {
+		var r = new Float64Array(16);
+		if (init) {
+			for (var i = 0; i < init.length; ++i)
+				r[i] = init[i];
+		}
+		return r;
+	}
+
+	static pack(o, n) {
+		var b, m = this.gf(), t = this.gf();
+		for (var i = 0; i < 16; ++i)
+			t[i] = n[i];
+		this.carry(t);
+		this.carry(t);
+		this.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;
+			this.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;
+		}
+	}
+
+	static 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;
+		}
+	}
+
+	static 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;
+		}
+	}
+
+	static add(o, a, b) {
+		for (var i = 0; i < 16; ++i)
+			o[i] = (a[i] + b[i]) | 0;
+	}
+
+	static subtract(o, a, b) {
+		for (var i = 0; i < 16; ++i)
+			o[i] = (a[i] - b[i]) | 0;
+	}
+
+	static 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];
+		this.carry(o);
+		this.carry(o);
+	}
+
+	static invert(o, i) {
+		var c = this.gf();
+		for (var a = 0; a < 16; ++a)
+			c[a] = i[a];
+		for (var a = 253; a >= 0; --a) {
+			this.multmod(c, c, c);
+			if (a !== 2 && a !== 4)
+                this.multmod(c, c, i);
+		}
+		for (var a = 0; a < 16; ++a)
+			o[a] = c[a];
+	}
+
+	static clamp(z) {
+		z[31] = (z[31] & 127) | 64;
+		z[0] &= 248;
+	}
+
+	static generatePublicKey(privateKey) {
+		var r, z = new Uint8Array(32);
+		var a = this.gf([1]),
+			b = this.gf([9]),
+			c = this.gf(),
+			d = this.gf([1]),
+			e = this.gf(),
+			f = this.gf(),
+			_121665 = this.gf([0xdb41, 1]),
+			_9 = this.gf([9]);
+		for (var i = 0; i < 32; ++i)
+			z[i] = privateKey[i];
+		this.clamp(z);
+		for (var i = 254; i >= 0; --i) {
+			r = (z[i >>> 3] >>> (i & 7)) & 1;
+			this.cswap(a, b, r);
+			this.cswap(c, d, r);
+			this.add(e, a, c);
+			this.subtract(a, a, c);
+			this.add(c, b, d);
+			this.subtract(b, b, d);
+			this.multmod(d, e, e);
+			this.multmod(f, a, a);
+			this.multmod(a, c, a);
+			this.multmod(c, b, e);
+			this.add(e, a, c);
+			this.subtract(a, a, c);
+			this.multmod(b, a, a);
+			this.subtract(c, d, f);
+			this.multmod(a, c, _121665);
+			this.add(a, a, d);
+			this.multmod(c, c, a);
+			this.multmod(a, d, f);
+			this.multmod(d, b, _9);
+			this.multmod(b, e, e);
+			this.cswap(a, b, r);
+			this.cswap(c, d, r);
+		}
+		this.invert(c, c);
+		this.multmod(a, a, c);
+		this.pack(z, a);
+		return z;
+	}
+
+	static generatePresharedKey() {
+		var privateKey = new Uint8Array(32);
+		window.crypto.getRandomValues(privateKey);
+		return privateKey;
+	}
+
+	static generatePrivateKey() {
+		var privateKey = this.generatePresharedKey();
+		this.clamp(privateKey);
+		return privateKey;
+	}
+
+	static 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);
+	}
+
+	static keyToBase64(key) {
+		var i, base64 = new Uint8Array(44);
+		for (i = 0; i < 32 / 3; ++i)
+            this.encodeBase64(base64.subarray(i * 4), key.subarray(i * 3));
+        this.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);
+	}
+
+    static keyFromBase64(encoded) {
+        const binaryStr = atob(encoded);
+        const bytes = new Uint8Array(binaryStr.length);
+        for (let i = 0; i < binaryStr.length; i++) {
+            bytes[i] = binaryStr.charCodeAt(i);
+        }
+        return bytes;
+    }
+
+	static generateKeypair(secretKey='') {
+        var privateKey = secretKey.length>0 ? this.keyFromBase64(secretKey) : this.generatePrivateKey();
+        var publicKey = this.generatePublicKey(privateKey);
+        return {
+            publicKey: this.keyToBase64(publicKey),
+            privateKey: secretKey.length>0 ? secretKey : this.keyToBase64(privateKey)
+        };
+    }
+}
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