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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -436,40 +436,27 @@ def reply(data): | |
| else: | ||
| print('unknown packet', data, addr) | ||
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| class WIREGUARD(asyncio.DatagramProtocol): | ||
| def __init__(self, args, sessions): | ||
| from nacl.public import PrivateKey | ||
| def __init__(self, args): | ||
| self.args = args | ||
| self.sessions = sessions | ||
| self.preshared_key = b'\x00'*32 | ||
| self.ippacket = ip.IPPacket(args) | ||
| self.private_key = hashlib.blake2s(args.passwd.encode()).digest() | ||
| self.public_key = bytes(PrivateKey(self.private_key).public_key) | ||
| self.responders = {} | ||
| self.public_key = crypto.X25519(self.private_key, 9) | ||
| self.keys = {} | ||
| self.index_generators = {} | ||
| self.sender_index_generator = itertools.count() | ||
| print('======== WIREGUARD SETTING ========') | ||
| print('PublicKey:', base64.b64encode(self.public_key).decode()) | ||
| print('===================================') | ||
| def connection_made(self, transport): | ||
| self.transport = transport | ||
| def datagram_received(self, data, addr): | ||
| from nacl import bindings | ||
| from nacl.public import PrivateKey | ||
| HASH = lambda x: hashlib.blake2s(x).digest() | ||
| MAC = lambda key, x: hashlib.blake2s(x, key=key, digest_size=16).digest() | ||
| HMAC = lambda key, x: hmac.digest(key, x, hashlib.blake2s) | ||
| DH = lambda pri, pub: bindings.crypto_scalarmult(pri, pub) | ||
| AEAD = lambda key, counter, plain_text, auth_text: bindings.crypto_aead_chacha20poly1305_ietf_encrypt(plain_text, auth_text, b'\x00\x00\x00\x00'+counter.to_bytes(8, 'little'), key) | ||
| AEAD_DECRYPT = lambda key, counter, cipher_text, auth_text: bindings.crypto_aead_chacha20poly1305_ietf_decrypt(cipher_text, auth_text, b'\x00\x00\x00\x00'+counter.to_bytes(8, 'little'), key) | ||
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| if len(data) < 32: | ||
| return | ||
| cmd = int.from_bytes(data[0:4], 'little') | ||
| if cmd == 1: | ||
| if len(data) != 148: | ||
| return | ||
| if cmd == 1 and len(data) == 148: | ||
| HASH = lambda x: hashlib.blake2s(x).digest() | ||
| MAC = lambda key, x: hashlib.blake2s(x, key=key, digest_size=16).digest() | ||
| HMAC = lambda key, x: hmac.digest(key, x, hashlib.blake2s) | ||
| p, mac1, mac2 = struct.unpack('<116s16s16s', data) | ||
| assert mac1 == MAC(HASH(b"mac1----" + self.public_key), p) | ||
| assert mac2 == b'\x00'*16 | ||
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@@ -479,57 +466,49 @@ def datagram_received(self, data, addr): | |
| chaining_key = HASH(b"Noise_IKpsk2_25519_ChaChaPoly_BLAKE2s") | ||
| hash0 = HASH(HASH(HASH(chaining_key + b"WireGuard v1 zx2c4 [email protected]") + self.public_key) + unencrypted_ephemeral) | ||
| chaining_key = HMAC(HMAC(chaining_key, unencrypted_ephemeral), b"\x01") | ||
| temp = HMAC(chaining_key, DH(self.private_key, unencrypted_ephemeral)) | ||
| temp = HMAC(chaining_key, crypto.X25519(self.private_key, unencrypted_ephemeral)) | ||
| chaining_key = HMAC(temp, b"\x01") | ||
| key = HMAC(temp, chaining_key + b"\x02") | ||
| static_public = AEAD_DECRYPT(key, 0, encrypted_static, hash0) | ||
| static_public = crypto.aead_chacha20poly1305_decrypt(HMAC(temp, chaining_key + b"\x02"), 0, encrypted_static, hash0) | ||
| hash0 = HASH(hash0 + encrypted_static) | ||
| temp = HMAC(chaining_key, DH(self.private_key, static_public)) | ||
| temp = HMAC(chaining_key, crypto.X25519(self.private_key, static_public)) | ||
| chaining_key = HMAC(temp, b"\x01") | ||
| key = HMAC(temp, chaining_key + b"\x02") | ||
| decrypted_timestamp = AEAD_DECRYPT(key, 0, encrypted_timestamp, hash0) | ||
| print('timestamp', decrypted_timestamp) | ||
| timestamp = crypto.aead_chacha20poly1305_decrypt(HMAC(temp, chaining_key + b"\x02"), 0, encrypted_timestamp, hash0) | ||
| hash0 = HASH(hash0 + encrypted_timestamp) | ||
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| ephemeral_private = os.urandom(32) | ||
| ephemeral_public = bytes(PrivateKey(ephemeral_private).public_key) | ||
| ephemeral_public = crypto.X25519(ephemeral_private, 9) | ||
| hash0 = HASH(hash0 + ephemeral_public) | ||
| chaining_key = HMAC(HMAC(chaining_key, ephemeral_public), b"\x01") | ||
| chaining_key = HMAC(HMAC(chaining_key, DH(ephemeral_private, unencrypted_ephemeral)), b"\x01") | ||
| chaining_key = HMAC(HMAC(chaining_key, DH(ephemeral_private, static_public)), b"\x01") | ||
| chaining_key = HMAC(HMAC(HMAC(HMAC(HMAC(HMAC(chaining_key, ephemeral_public), b"\x01"), crypto.X25519(ephemeral_private, unencrypted_ephemeral)), b"\x01"), crypto.X25519(ephemeral_private, static_public)), b"\x01") | ||
| temp = HMAC(chaining_key, self.preshared_key) | ||
| chaining_key = HMAC(temp, b"\x01") | ||
| temp2 = HMAC(temp, chaining_key + b"\x02") | ||
| key = HMAC(temp, temp2 + b"\x03") | ||
| hash0 = HASH(hash0 + temp2) | ||
| encrypted_nothing = AEAD(key, 0, b"", hash0) | ||
| hash0 = HASH(hash0 + encrypted_nothing) | ||
| encrypted_nothing = crypto.aead_chacha20poly1305_encrypt(key, 0, b"", hash0) | ||
| #hash0 = HASH(hash0 + encrypted_nothing) | ||
| msg = struct.pack('<III32s16s', 2, index, sender_index, ephemeral_public, encrypted_nothing) | ||
| msg = msg + MAC(HASH(b"mac1----" + static_public), msg) + b'\x00'*16 | ||
| self.transport.sendto(msg, addr) | ||
| print('login', addr, sender_index) | ||
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| temp1 = HMAC(chaining_key, b"") | ||
| temp2 = HMAC(temp1, b"\x01") | ||
| temp3 = HMAC(temp1, temp2 + b"\x02") | ||
| self.responders[index] = [sender_index, temp2, 0, temp3, 0, []] | ||
| packet = struct.pack('<III32s16s', 2, index, sender_index, ephemeral_public, encrypted_nothing) | ||
| mac1 = MAC(HASH(b"mac1----" + static_public), packet) | ||
| mac2 = b'\x00'*16 | ||
| msg = packet + mac1 + mac2 | ||
| print('login', addr, sender_index) | ||
| self.transport.sendto(msg, addr) | ||
| elif cmd == 4: | ||
| _, receiver_index, counter = struct.unpack('<IIQ', data[:16]) | ||
| packet = data[16:] | ||
| sender_index, receiving_key, receiving_key_counter, sending_key, sending_key_counter, msg_queue = self.responders[receiver_index] | ||
| encapsulated_packet = AEAD_DECRYPT(receiving_key, counter, packet, b'') | ||
| self.keys[index] = [sender_index, temp2, temp3] | ||
| self.index_generators[index] = itertools.count() | ||
| elif cmd == 4 and len(data) >= 32: | ||
| _, index, counter = struct.unpack('<IIQ', data[:16]) | ||
| sender_index, receiving_key, sending_key = self.keys[index] | ||
| packet = crypto.aead_chacha20poly1305_decrypt(receiving_key, counter, data[16:], b'') | ||
| def reply(data): | ||
| counter = self.responders[receiver_index][4] | ||
| self.responders[receiver_index][4] += 1 | ||
| counter = next(self.index_generators[index]) | ||
| data = data + b''*((-len(data))%16) | ||
| encrypted_encapsulated_packet = AEAD(sending_key, counter, data, b'') | ||
| msg = struct.pack('<IIQ', 4, sender_index, counter) + encrypted_encapsulated_packet | ||
| msg = crypto.aead_chacha20poly1305_encrypt(sending_key, counter, data, b'') | ||
| msg = struct.pack('<IIQ', 4, sender_index, counter) + msg | ||
| self.transport.sendto(msg, addr) | ||
| return True | ||
| if encapsulated_packet: | ||
| self.ippacket.handle_ipv4(addr[:2], encapsulated_packet, reply) | ||
| if packet: | ||
| self.ippacket.handle_ipv4(addr[:2], packet, reply) | ||
| else: | ||
| reply(b'') | ||
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@@ -553,7 +532,7 @@ def main(): | |
| transport2, _ = loop.run_until_complete(loop.create_datagram_endpoint(lambda: SPE_4500(args, sessions), ('0.0.0.0', 4500))) | ||
| print('Serving on UDP :500 :4500...') | ||
| if args.wireguard: | ||
| transport3, _ = loop.run_until_complete(loop.create_datagram_endpoint(lambda: WIREGUARD(args, sessions), ('0.0.0.0', args.wireguard))) | ||
| transport3, _ = loop.run_until_complete(loop.create_datagram_endpoint(lambda: WIREGUARD(args), ('0.0.0.0', args.wireguard))) | ||
| print(f'Serving on UDP :{args.wireguard} (WIREGUARD)...') | ||
| else: | ||
| transport3 = None | ||
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