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early break if the protocol is not tls

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Alexander Bersenev
2019-08-16 15:17:07 +05:00
parent ccc8c3fb14
commit 559c577df1
1 changed files with 5 additions and 5 deletions
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10
mtprotoproxy.py
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@@ -963,7 +963,6 @@ async def handle_handshake(reader, writer):
global used_handshakes
TLS_START_BYTES = b"\x16\x03\x01\x02\x00\x01\x00\x01\xfc\x03\x03"
TLS_START_LEN = len(TLS_START_BYTES)
EMPTY_READ_BUF_SIZE = 4096
peer = writer.get_extra_info('peername')[:2]
@@ -976,13 +975,14 @@ async def handle_handshake(reader, writer):
is_tls_handshake = True
handshake = b""
for byte_num in range(TLS_START_LEN):
for expected_byte in TLS_START_BYTES:
handshake += await reader.readexactly(1)
if handshake[-1] != TLS_START_BYTES[byte_num]:
if handshake[-1] != expected_byte:
is_tls_handshake = False
break
if is_tls_handshake:
handshake += await reader.readexactly(TLS_HANDSHAKE_LEN - TLS_START_LEN)
handshake += await reader.readexactly(TLS_HANDSHAKE_LEN - len(handshake))
tls_handshake_result = await handle_pseudo_tls_handshake(handshake, reader, writer, peer)
if not tls_handshake_result:
@@ -994,7 +994,7 @@ async def handle_handshake(reader, writer):
if config.TLS_ONLY:
await handle_bad_client(reader, writer, handshake)
return False
handshake += await reader.readexactly(HANDSHAKE_LEN - TLS_START_LEN)
handshake += await reader.readexactly(HANDSHAKE_LEN - len(handshake))
dec_prekey_and_iv = handshake[SKIP_LEN:SKIP_LEN+PREKEY_LEN+IV_LEN]
dec_prekey, dec_iv = dec_prekey_and_iv[:PREKEY_LEN], dec_prekey_and_iv[PREKEY_LEN:]