diff --git a/pkg/purevpn/browser.go b/pkg/purevpn/browser.go index 1e3c13f..7ca44be 100644 --- a/pkg/purevpn/browser.go +++ b/pkg/purevpn/browser.go @@ -83,6 +83,211 @@ func GetToken(page *rod.Page, uuid string) (string, error) { return res.Value.Str(), nil } +func GenerateWireguardKeyPair(page *rod.Page) (string, string, error) { + // Javascript wireguard keypair module from wireguard-tools - also used by purevpn + // https://raw.githubusercontent.com/WireGuard/wireguard-tools/master/contrib/keygen-html/wireguard.js + + _, err := page.Eval(` + () => { + /*! SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2020 Jason A. Donenfeld . 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 clamp(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]; + clamp(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(); + clamp(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) + }; + } + }; + })(); + + }`) + if err != nil { + return "", "", err + } + + res, err := page.Eval(` + () => window.wireguard.generateKeypair() + `) + if err != nil { + return "", "", err + } + return res.Value.Get("privateKey").String(), res.Value.Get("publicKey").String(), nil +} + func GetWireguardServer(page *rod.Page, config *util.Config, token string) (string, error) { publicKey, privateKey, err := wireguard.GenerateKeyPair() if err != nil { @@ -92,6 +297,14 @@ func GetWireguardServer(page *rod.Page, config *util.Config, token string) (stri fmt.Printf("Generated keys, publicKey: %v, privateKey: %v\n", publicKey, privateKey) } + publicKey, privateKey, err = GenerateWireguardKeyPair(page) + if err != nil { + return "", err + } + if config.Debug { + fmt.Printf("Generated keys, publicKey: %v, privateKey: %v\n", publicKey, privateKey) + } + params := url.Values{} params.Add("sUsername", config.Subscription.Username) params.Add("sPassword", config.Subscription.Password)