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generate plausible x25519 public key for server hello also

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Alexander Bersenev
2019-08-19 21:48:54 +05:00
parent ea28a7055a
commit e081d6b727
1 changed files with 8 additions and 8 deletions
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16
mtprotoproxy.py
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@@ -795,6 +795,13 @@ def set_instant_rst(sock):
try_setsockopt(sock, socket.SOL_SOCKET, socket.SO_LINGER, INSTANT_RST)
def gen_x25519_public_key():
# generates some number which has square root by modulo P
P = 2**255 - 19
n = random.randrange(P)
return int.to_bytes((n*n) % P, length=32, byteorder="little")
async def handle_bad_client(reader_clt, writer_clt, handshake):
BUF_SIZE = 8192
CONNECT_TIMEOUT = 5
@@ -887,8 +894,7 @@ async def handle_fake_tls_handshake(handshake, reader, writer, peer):
SESSION_ID_POS = SESSION_ID_LEN_POS + 1
tls_extensions = b"\x00\x2e" + b"\x00\x33\x00\x24" + b"\x00\x1d\x00\x20"
tls_extensions += bytes([random.randrange(0, 256) for i in range(32)])
tls_extensions += b"\x00\x2b\x00\x02\x03\x04"
tls_extensions += gen_x25519_public_key() + b"\x00\x2b\x00\x02\x03\x04"
digest = handshake[DIGEST_POS: DIGEST_POS + DIGEST_LEN]
@@ -1491,12 +1497,6 @@ async def make_https_req(url, host="core.telegram.org"):
def gen_tls_client_hello_msg(server_name):
def gen_x25519_public_key():
# generates some number which has square root by modulo P
P = 2**255 - 19
n = random.randrange(P)
return int.to_bytes((n*n) % P, length=32, byteorder="little")
msg = bytearray(b"\x16\x03\x01\x02\x00\x01\x00\x01\xfc\x03\x03")
msg += bytes([random.randrange(0, 256) for i in range(32)])
msg += b"\x20"