def post_send(self, status):
cipher_suite = status.cipher
if self.extended_master_secret is None:
self.extended_master_secret = status.extended_master_secret
if not status.resuming:
if self.extended_master_secret:
master_secret = \
calcExtendedMasterSecret(status.version,
cipher_suite,
status.premaster_secret,
status.handshake_hashes)
else:
master_secret = calcMasterSecret(status.version, cipher_suite,
status.premaster_secret,
status.client_random,
status.server_random)
status.master_secret = master_secret
# in case of resumption, the pending states are generated
# during receive of server sent CCS
calc_pending_states(status)
status.msg_sock.changeWriteState()
def to_bytes(self):
[client_hello] = [
msg.body for msg in self.handshake_messages
if msg.handshake_type == HandshakeType.client_hello
]
[server_hello] = [
msg.body for msg in self.handshake_messages
if msg.handshake_type == HandshakeType.server_hello
]
negotiated_version = server_hello.version
negotiated_version = negotiated_version.to_bytes(2, byteorder="big")
negotiated_version = (negotiated_version[0], negotiated_version[1])
negotiated_cipher_suite = server_hello.cipher_suite
handshake_messages = EMPTY_BYTES.join(
[m.to_bytes() for m in self.handshake_messages])
master_secret = calcMasterSecret(
negotiated_version,
negotiated_cipher_suite,
self.pre_master_secret,
client_hello.random_bytes,
server_hello.random_bytes,
)
finished = PRF(
master_secret,
self.FINISHED_LABEL,
MD5(handshake_messages) + SHA1(handshake_messages),
12,
)
return bytes.fromhex("00" * 48) # doesn't matter
def post_send(self, status):
"""Generate new encryption keys for connection."""
cipher_suite = status.cipher
status.msg_sock.encryptThenMAC = status.encrypt_then_mac
if self.extended_master_secret is None:
self.extended_master_secret = status.extended_master_secret
if not status.resuming:
if self.extended_master_secret:
# in case client certificates are used, we need to omit
# certificate verify message
hh = status.certificate_verify_handshake_hashes
if not hh:
hh = status.handshake_hashes
master_secret = \
calcExtendedMasterSecret(status.version,
cipher_suite,
status.premaster_secret,
hh)
else:
master_secret = calcMasterSecret(status.version,
cipher_suite,
status.premaster_secret,
status.client_random,
status.server_random)
status.master_secret = master_secret
# in case of resumption, the pending states are generated
# during receive of server sent CCS
calc_pending_states(status)
status.msg_sock.changeWriteState()
def test_with_empty_values(self):
ret = calcMasterSecret((3, 3), 0, bytearray(48), bytearray(32),
bytearray(32))
self.assertEqual(bytearray(
b'I\xcf\xae\xe5[\x86\x92\xd3\xbbm\xd6\xeekSo/' +
b'\x17\xaf\xbc\x84\x18\tGc\xbc\xb5\xbe\xd6\xb0\x05\xad\xf8' +
b'\x88\xd0`\xe4\x8c^\xb2&ls\xcb\x1a=-Kh'
), ret)
self.assertEqual(48, len(ret))
def test_with_empty_values(self):
ret = calcMasterSecret((3, 3), 0, bytearray(48), bytearray(32),
bytearray(32))
self.assertEqual(
bytearray(
b'I\xcf\xae\xe5[\x86\x92\xd3\xbbm\xd6\xeekSo/' +
b'\x17\xaf\xbc\x84\x18\tGc\xbc\xb5\xbe\xd6\xb0\x05\xad\xf8' +
b'\x88\xd0`\xe4\x8c^\xb2&ls\xcb\x1a=-Kh'), ret)
self.assertEqual(48, len(ret))
def post_send(self, status):
cipher_suite = status.cipher
master_secret = calcMasterSecret(status.version, cipher_suite,
status.premaster_secret,
status.client_random,
status.server_random)
status.master_secret = master_secret
status.msg_sock.calcPendingStates(cipher_suite, master_secret,
status.client_random,
status.server_random, None)
status.msg_sock.changeWriteState()
def post_send(self, status):
cipher_suite = status.cipher
master_secret = calcMasterSecret(status.version,
cipher_suite,
status.premaster_secret,
status.client_random,
status.server_random)
status.master_secret = master_secret
status.msg_sock.calcPendingStates(cipher_suite,
master_secret,
status.client_random,
status.server_random,
None)
status.msg_sock.changeWriteState()
def post_send(self, status):
cipher_suite = status.cipher
if not status.resuming:
master_secret = calcMasterSecret(status.version,
cipher_suite,
status.premaster_secret,
status.client_random,
status.server_random)
status.master_secret = master_secret
# in case of resumption, the pending states are generated
# during receive of server sent CCS
status.msg_sock.calcPendingStates(cipher_suite,
master_secret,
status.client_random,
status.server_random,
None)
status.msg_sock.changeWriteState()
def handshakeProxy(c_conn, s_conn, oracle):
s_conn._handshakeStart(client=False)
c_conn._handshakeStart(client=True)
s_settings = HandshakeSettings()
c_settings = HandshakeSettings()
# CLIENT HELLO C -> S
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.client_hello):
if result in (0, 1): yield result
else: break
clientHello = result
c_conn.version = (3, 1) # Hardcoded version
for result in c_conn._sendMsg(clientHello):
yield result
# Send Server Hello, Certificate and Server Hello Done in one packet
s_conn.sock.buffer_writes = True
# SERVER HELLO S -> C
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.server_hello):
if result in (0, 1): yield result
else: break
serverHello = result
s_conn.version = serverHello.server_version
cipherSuite = serverHello.cipher_suite
for result in s_conn._sendMsg(serverHello):
yield result
# CERTIFICATE S -> C
for result in c_conn._getMsg(
ContentType.handshake, HandshakeType.certificate,
serverHello.certificate_type): # FIXME : we should only allow RSA
if result in (0, 1): yield result
else: break
serverCertificate = result
for result in s_conn._sendMsg(serverCertificate):
yield result
# CERTIFICATE REQUEST S -> C
if 0:
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.certificate_request):
if result in (0, 1): yield result
else: break
certificate_request = result
for result in s_conn._sendMsg(certificate_request):
yield result
# SERVER HELLO DONE S -> C
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.server_hello_done):
if result in (0, 1): yield result
else: break
serverHelloDone = result
for result in s_conn._sendMsg(serverHelloDone):
yield result
s_conn.sock.flush()
s_conn.sock.buffer_writes = False
# Send Client Key Exchange, Change Cipher Spec, Finished in one message
c_conn.sock.buffer_writes = True
# CERTIFICATE C -> S
if 0:
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.certificate,
serverHello.certificate_type
): # FIXME : we should allow anything ?
if result in (0, 1): yield result
else: break
clientCertificate = result
for result in c_conn._sendMsg(clientCertificate):
yield result
# CLIENT KEY EXCHANGE C -> S
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.client_key_exchange,
cipherSuite):
if result in (0, 1): yield result
else: break
clientKeyExchange = result
# Ask the oracle if we continue
epms = clientKeyExchange.encryptedPreMasterSecret
if not oracle(epms):
# YOU SHALL NOT PASS !
print("Shall not pass")
return
print("Decoding phase")
# Decrypt master key
dec = subprocess.Popen(['./decrypt', '{}:{}'.format(*oracleaddr), cert],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
dec.stdin.write(hexlify(epms) + b'\n')
dec.stdin.close()
res = dec.stdout.readline().strip().split()[-1]
dec.stdout.close()
print(res)
premasterSecret = unhexlify(res)
# If it's ok, continue
for result in c_conn._sendMsg(clientKeyExchange):
yield result
settings = HandshakeSettings()
masterSecret = calcMasterSecret(c_conn.version, cipherSuite,
premasterSecret, clientHello.random,
serverHello.random)
print(masterSecret)
s_conn._calcPendingStates(cipherSuite, masterSecret, clientHello.random,
serverHello.random,
settings.cipherImplementations)
c_conn._calcPendingStates(cipherSuite, masterSecret, clientHello.random,
serverHello.random,
settings.cipherImplementations)
print('foobar')
# CHANGE-CIPHER-SPEC C -> S
for result in s_conn._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
yield result
s_changeCipherSpec = result
for result in c_conn._sendMsg(s_changeCipherSpec):
yield result
s_conn._changeReadState()
c_conn._changeWriteState()
# SERVER-FINISHED C -> S
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.finished):
if result in (0, 1):
yield result
server_finished = result
for result in c_conn._sendMsg(server_finished):
yield result
c_conn.sock.flush()
c_conn.sock.buffer_writes = False
# Send New Session Ticket, Change Cipher Spec, Finished in one message
s_conn.sock.buffer_writes = True
# NEW-SESSION-TICKET
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.new_session_ticket):
if result in (0, 1):
yield result
newSessionTicket = result
for result in s_conn._sendMsg(newSessionTicket):
yield result
# CHANGE-CIPHER-SPEC
for result in c_conn._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
yield result
c_changeCipherSpec = result
for result in s_conn._sendMsg(c_changeCipherSpec):
yield result
c_conn._changeReadState()
s_conn._changeWriteState()
# SERVER-FINISHED
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.finished):
if result in (0, 1):
yield result
client_finished = result
for result in s_conn._sendMsg(client_finished):
yield result
s_conn.sock.flush()
s_conn.sock.buffer_writes = False
c_conn._handshakeDone(False)
s_conn._handshakeDone(False)
cont = True
while cont:
for c_data, s_data in zip(c_conn.readAsync(), s_conn.readAsync()):
if c_data in (0, 1):
yield c_data
elif not c_data:
# End connection
print('server ended')
cont = False
else:
print('c', c_data)
for result in s_conn.writeAsync(c_data):
yield result
if s_data in (0, 1):
yield s_data
elif not s_data:
# End connection
print('client ended')
cont = False
else:
print('s', s_data)
for result in c_conn.writeAsync(s_data):
yield result
c_conn.close()
s_conn.close()
print("The end")
def test_full_connection_with_external_server(self):
# TODO test is slow (100ms) move to integration test suite
#
# start a regular TLS server locally before running this test
# e.g.: openssl s_server -key localhost.key -cert localhost.crt
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 4433))
record_layer = TLSRecordLayer(sock)
record_layer._handshakeStart(client=True)
record_layer.version = (3, 3)
client_hello = ClientHello()
client_hello = client_hello.create(
(3, 3), bytearray(32), bytearray(0),
[CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA], None, None, False,
False, None)
for result in record_layer._sendMsg(client_hello):
if result in (0, 1):
raise Exception("blocking socket")
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.server_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello = result
self.assertEqual(ServerHello, type(server_hello))
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.certificate,
CertificateType.x509):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_certificate = result
self.assertEqual(Certificate, type(server_certificate))
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.server_hello_done):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello_done = result
self.assertEqual(ServerHelloDone, type(server_hello_done))
public_key = server_certificate.cert_chain.getEndEntityPublicKey()
premasterSecret = bytearray(48)
premasterSecret[0] = 3 # 'cause we negotiatied TLSv1.2
premasterSecret[1] = 3
encryptedPreMasterSecret = public_key.encrypt(premasterSecret)
client_key_exchange = ClientKeyExchange(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, (3, 3))
client_key_exchange.createRSA(encryptedPreMasterSecret)
for result in record_layer._sendMsg(client_key_exchange):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
master_secret = calcMasterSecret(
(3, 3), CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, premasterSecret,
client_hello.random, server_hello.random)
record_layer._calcPendingStates(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, master_secret,
client_hello.random, server_hello.random, None)
for result in record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
record_layer._changeWriteState()
handshake_hashes = record_layer._handshake_hash.digest('sha256')
verify_data = PRF_1_2(master_secret, b'client finished',
handshake_hashes, 12)
finished = Finished((3, 3)).create(verify_data)
for result in record_layer._sendMsg(finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
for result in record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(change_cipher_spec))
record_layer._changeReadState()
handshake_hashes = record_layer._handshake_hash.digest('sha256')
server_verify_data = PRF_1_2(master_secret, b'server finished',
handshake_hashes, 12)
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_finished = result
self.assertEqual(Finished, type(server_finished))
self.assertEqual(server_verify_data, server_finished.verify_data)
record_layer._handshakeDone(resumed=False)
record_layer.write(bytearray(b'text\n'))
record_layer.close()
def test_full_connection_with_RSA_kex(self):
clnt_sock, srv_sock = socket.socketpair()
#
# client part
#
record_layer = TLSRecordLayer(clnt_sock)
record_layer._handshakeStart(client=True)
record_layer.version = (3, 3)
client_hello = ClientHello()
client_hello = client_hello.create(
(3, 3), bytearray(32), bytearray(0),
[CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA], None, None, False,
False, None)
for result in record_layer._sendMsg(client_hello):
if result in (0, 1):
raise Exception("blocking socket")
#
# server part
#
srv_record_layer = TLSRecordLayer(srv_sock)
srv_raw_certificate = str(
"-----BEGIN CERTIFICATE-----\n"\
"MIIB9jCCAV+gAwIBAgIJAMyn9DpsTG55MA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV\n"\
"BAMMCWxvY2FsaG9zdDAeFw0xNTAxMjExNDQzMDFaFw0xNTAyMjAxNDQzMDFaMBQx\n"\
"EjAQBgNVBAMMCWxvY2FsaG9zdDCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA\n"\
"0QkEeakSyV/LMtTeARdRtX5pdbzVuUuqOIdz3lg7YOyRJ/oyLTPzWXpKxr//t4FP\n"\
"QvYsSJiVOlPk895FNu6sNF/uJQyQGfFWYKkE6fzFifQ6s9kssskFlL1DVI/dD/Zn\n"\
"7sgzua2P1SyLJHQTTs1MtMb170/fX2EBPkDz+2kYKN0CAwEAAaNQME4wHQYDVR0O\n"\
"BBYEFJtvXbRmxRFXYVMOPH/29pXCpGmLMB8GA1UdIwQYMBaAFJtvXbRmxRFXYVMO\n"\
"PH/29pXCpGmLMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQELBQADgYEAkOgC7LP/\n"\
"Rd6uJXY28HlD2K+/hMh1C3SRT855ggiCMiwstTHACGgNM+AZNqt6k8nSfXc6k1gw\n"\
"5a7SGjzkWzMaZC3ChBeCzt/vIAGlMyXeqTRhjTCdc/ygRv3NPrhUKKsxUYyXRk5v\n"\
"g/g6MwxzXfQP3IyFu3a9Jia/P89Z1rQCNRY=\n"\
"-----END CERTIFICATE-----\n"\
)
srv_raw_key = str(
"-----BEGIN RSA PRIVATE KEY-----\n"\
"MIICXQIBAAKBgQDRCQR5qRLJX8sy1N4BF1G1fml1vNW5S6o4h3PeWDtg7JEn+jIt\n"\
"M/NZekrGv/+3gU9C9ixImJU6U+Tz3kU27qw0X+4lDJAZ8VZgqQTp/MWJ9Dqz2Syy\n"\
"yQWUvUNUj90P9mfuyDO5rY/VLIskdBNOzUy0xvXvT99fYQE+QPP7aRgo3QIDAQAB\n"\
"AoGAVSLbE8HsyN+fHwDbuo4I1Wa7BRz33xQWLBfe9TvyUzOGm0WnkgmKn3LTacdh\n"\
"GxgrdBZXSun6PVtV8I0im5DxyVaNdi33sp+PIkZU386f1VUqcnYnmgsnsUQEBJQu\n"\
"fUZmgNM+bfR+Rfli4Mew8lQ0sorZ+d2/5fsM0g80Qhi5M3ECQQDvXeCyrcy0u/HZ\n"\
"FNjIloyXaAIvavZ6Lc6gfznCSfHc5YwplOY7dIWp8FRRJcyXkA370l5dJ0EXj5Gx\n"\
"udV9QQ43AkEA34+RxjRk4DT7Zo+tbM/Fkoi7jh1/0hFkU5NDHweJeH/mJseiHtsH\n"\
"KOcPGtEGBBqT2KNPWVz4Fj19LiUmmjWXiwJBAIBs49O5/+ywMdAAqVblv0S0nweF\n"\
"4fwne4cM+5ZMSiH0XsEojGY13EkTEon/N8fRmE8VzV85YmkbtFWgmPR85P0CQQCs\n"\
"elWbN10EZZv3+q1wH7RsYzVgZX3yEhz3JcxJKkVzRCnKjYaUi6MweWN76vvbOq4K\n"\
"G6Tiawm0Duh/K4ZmvyYVAkBppE5RRQqXiv1KF9bArcAJHvLm0vnHPpf1yIQr5bW6\n"\
"njBuL4qcxlaKJVGRXT7yFtj2fj0gv3914jY2suWqp8XJ\n"\
"-----END RSA PRIVATE KEY-----\n"\
)
srv_private_key = parsePEMKey(srv_raw_key, private=True)
srv_cert_chain = X509CertChain([X509().parse(srv_raw_certificate)])
srv_record_layer._handshakeStart(client=False)
srv_record_layer.version = (3, 3)
for result in srv_record_layer._getMsg(ContentType.handshake,
HandshakeType.client_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_client_hello = result
self.assertEqual(ClientHello, type(srv_client_hello))
srv_cipher_suite = CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA
srv_session_id = bytearray(0)
srv_server_hello = ServerHello().create(
(3, 3), bytearray(32), srv_session_id, srv_cipher_suite,
CertificateType.x509, None, None)
srv_msgs = []
srv_msgs.append(srv_server_hello)
srv_msgs.append(
Certificate(CertificateType.x509).create(srv_cert_chain))
srv_msgs.append(ServerHelloDone())
for result in srv_record_layer._sendMsgs(srv_msgs):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._versionCheck = True
#
# client part
#
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.server_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello = result
self.assertEqual(ServerHello, type(server_hello))
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.certificate,
CertificateType.x509):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_certificate = result
self.assertEqual(Certificate, type(server_certificate))
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.server_hello_done):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello_done = result
self.assertEqual(ServerHelloDone, type(server_hello_done))
public_key = server_certificate.cert_chain.getEndEntityPublicKey()
premasterSecret = bytearray(48)
premasterSecret[0] = 3 # 'cause we negotiatied TLSv1.2
premasterSecret[1] = 3
encryptedPreMasterSecret = public_key.encrypt(premasterSecret)
client_key_exchange = ClientKeyExchange(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, (3, 3))
client_key_exchange.createRSA(encryptedPreMasterSecret)
for result in record_layer._sendMsg(client_key_exchange):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
master_secret = calcMasterSecret(
(3, 3), CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, premasterSecret,
client_hello.random, server_hello.random)
record_layer._calcPendingStates(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, master_secret,
client_hello.random, server_hello.random, None)
for result in record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
record_layer._changeWriteState()
handshake_hashes = record_layer._handshake_hash.digest('sha256')
verify_data = PRF_1_2(master_secret, b'client finished',
handshake_hashes, 12)
finished = Finished((3, 3)).create(verify_data)
for result in record_layer._sendMsg(finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
#
# server part
#
for result in srv_record_layer._getMsg(
ContentType.handshake, HandshakeType.client_key_exchange,
srv_cipher_suite):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_client_key_exchange = result
srv_premaster_secret = srv_private_key.decrypt(
srv_client_key_exchange.encryptedPreMasterSecret)
self.assertEqual(bytearray(b'\x03\x03' + b'\x00' * 46),
srv_premaster_secret)
srv_master_secret = calcMasterSecret(
srv_record_layer.version, CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
srv_premaster_secret, srv_client_hello.random,
srv_server_hello.random)
srv_record_layer._calcPendingStates(srv_cipher_suite,
srv_master_secret,
srv_client_hello.random,
srv_server_hello.random, None)
for result in srv_record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(srv_change_cipher_spec))
srv_record_layer._changeReadState()
srv_handshakeHashes = srv_record_layer._handshake_hash.digest('sha256')
srv_verify_data = PRF_1_2(srv_master_secret, b"client finished",
srv_handshakeHashes, 12)
for result in srv_record_layer._getMsg(ContentType.handshake,
HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_finished = result
self.assertEqual(Finished, type(srv_finished))
self.assertEqual(srv_verify_data, srv_finished.verify_data)
for result in srv_record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._changeWriteState()
srv_handshakeHashes = srv_record_layer._handshake_hash.digest('sha256')
srv_verify_data = PRF_1_2(srv_master_secret, b"server finished",
srv_handshakeHashes, 12)
for result in srv_record_layer._sendMsg(
Finished((3, 3)).create(srv_verify_data)):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._handshakeDone(resumed=False)
#
# client part
#
for result in record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(change_cipher_spec))
record_layer._changeReadState()
handshake_hashes = record_layer._handshake_hash.digest('sha256')
server_verify_data = PRF_1_2(master_secret, b'server finished',
handshake_hashes, 12)
for result in record_layer._getMsg(ContentType.handshake,
HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_finished = result
self.assertEqual(Finished, type(server_finished))
self.assertEqual(server_verify_data, server_finished.verify_data)
record_layer._handshakeDone(resumed=False)
# try sending data
record_layer.write(bytearray(b'text\n'))
# try recieving data
data = srv_record_layer.read(10)
self.assertEqual(data, bytearray(b'text\n'))
record_layer.close()
srv_record_layer.close()
def test_full_connection_with_external_server(self):
# TODO test is slow (100ms) move to integration test suite
#
# start a regular TLS server locally before running this test
# e.g.: openssl s_server -key localhost.key -cert localhost.crt
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 4433))
record_layer = TLSRecordLayer(sock)
record_layer._handshakeStart(client=True)
record_layer.version = (3, 3)
client_hello = ClientHello()
client_hello = client_hello.create(
(3, 3),
bytearray(32),
bytearray(0),
[CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA],
None,
None,
False,
False,
None,
)
for result in record_layer._sendMsg(client_hello):
if result in (0, 1):
raise Exception("blocking socket")
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.server_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello = result
self.assertEqual(ServerHello, type(server_hello))
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.certificate, CertificateType.x509):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_certificate = result
self.assertEqual(Certificate, type(server_certificate))
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.server_hello_done):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello_done = result
self.assertEqual(ServerHelloDone, type(server_hello_done))
public_key = server_certificate.certChain.getEndEntityPublicKey()
premasterSecret = bytearray(48)
premasterSecret[0] = 3 # 'cause we negotiatied TLSv1.2
premasterSecret[1] = 3
encryptedPreMasterSecret = public_key.encrypt(premasterSecret)
client_key_exchange = ClientKeyExchange(CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, (3, 3))
client_key_exchange.createRSA(encryptedPreMasterSecret)
for result in record_layer._sendMsg(client_key_exchange):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
master_secret = calcMasterSecret(
(3, 3), CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, premasterSecret, client_hello.random, server_hello.random
)
record_layer._calcPendingStates(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, master_secret, client_hello.random, server_hello.random, None
)
for result in record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
record_layer._changeWriteState()
handshake_hashes = record_layer._handshake_hash.digest("sha256")
verify_data = PRF_1_2(master_secret, b"client finished", handshake_hashes, 12)
finished = Finished((3, 3)).create(verify_data)
for result in record_layer._sendMsg(finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
for result in record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(change_cipher_spec))
record_layer._changeReadState()
handshake_hashes = record_layer._handshake_hash.digest("sha256")
server_verify_data = PRF_1_2(master_secret, b"server finished", handshake_hashes, 12)
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_finished = result
self.assertEqual(Finished, type(server_finished))
self.assertEqual(server_verify_data, server_finished.verify_data)
record_layer._handshakeDone(resumed=False)
record_layer.write(bytearray(b"text\n"))
record_layer.close()
def test_full_connection_with_RSA_kex(self):
clnt_sock, srv_sock = socket.socketpair()
#
# client part
#
record_layer = TLSRecordLayer(clnt_sock)
record_layer._handshakeStart(client=True)
record_layer.version = (3, 3)
client_hello = ClientHello()
client_hello = client_hello.create(
(3, 3),
bytearray(32),
bytearray(0),
[CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA],
None,
None,
False,
False,
None,
)
for result in record_layer._sendMsg(client_hello):
if result in (0, 1):
raise Exception("blocking socket")
#
# server part
#
srv_record_layer = TLSRecordLayer(srv_sock)
srv_raw_certificate = str(
"-----BEGIN CERTIFICATE-----\n"
"MIIB9jCCAV+gAwIBAgIJAMyn9DpsTG55MA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV\n"
"BAMMCWxvY2FsaG9zdDAeFw0xNTAxMjExNDQzMDFaFw0xNTAyMjAxNDQzMDFaMBQx\n"
"EjAQBgNVBAMMCWxvY2FsaG9zdDCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA\n"
"0QkEeakSyV/LMtTeARdRtX5pdbzVuUuqOIdz3lg7YOyRJ/oyLTPzWXpKxr//t4FP\n"
"QvYsSJiVOlPk895FNu6sNF/uJQyQGfFWYKkE6fzFifQ6s9kssskFlL1DVI/dD/Zn\n"
"7sgzua2P1SyLJHQTTs1MtMb170/fX2EBPkDz+2kYKN0CAwEAAaNQME4wHQYDVR0O\n"
"BBYEFJtvXbRmxRFXYVMOPH/29pXCpGmLMB8GA1UdIwQYMBaAFJtvXbRmxRFXYVMO\n"
"PH/29pXCpGmLMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQELBQADgYEAkOgC7LP/\n"
"Rd6uJXY28HlD2K+/hMh1C3SRT855ggiCMiwstTHACGgNM+AZNqt6k8nSfXc6k1gw\n"
"5a7SGjzkWzMaZC3ChBeCzt/vIAGlMyXeqTRhjTCdc/ygRv3NPrhUKKsxUYyXRk5v\n"
"g/g6MwxzXfQP3IyFu3a9Jia/P89Z1rQCNRY=\n"
"-----END CERTIFICATE-----\n"
)
srv_raw_key = str(
"-----BEGIN RSA PRIVATE KEY-----\n"
"MIICXQIBAAKBgQDRCQR5qRLJX8sy1N4BF1G1fml1vNW5S6o4h3PeWDtg7JEn+jIt\n"
"M/NZekrGv/+3gU9C9ixImJU6U+Tz3kU27qw0X+4lDJAZ8VZgqQTp/MWJ9Dqz2Syy\n"
"yQWUvUNUj90P9mfuyDO5rY/VLIskdBNOzUy0xvXvT99fYQE+QPP7aRgo3QIDAQAB\n"
"AoGAVSLbE8HsyN+fHwDbuo4I1Wa7BRz33xQWLBfe9TvyUzOGm0WnkgmKn3LTacdh\n"
"GxgrdBZXSun6PVtV8I0im5DxyVaNdi33sp+PIkZU386f1VUqcnYnmgsnsUQEBJQu\n"
"fUZmgNM+bfR+Rfli4Mew8lQ0sorZ+d2/5fsM0g80Qhi5M3ECQQDvXeCyrcy0u/HZ\n"
"FNjIloyXaAIvavZ6Lc6gfznCSfHc5YwplOY7dIWp8FRRJcyXkA370l5dJ0EXj5Gx\n"
"udV9QQ43AkEA34+RxjRk4DT7Zo+tbM/Fkoi7jh1/0hFkU5NDHweJeH/mJseiHtsH\n"
"KOcPGtEGBBqT2KNPWVz4Fj19LiUmmjWXiwJBAIBs49O5/+ywMdAAqVblv0S0nweF\n"
"4fwne4cM+5ZMSiH0XsEojGY13EkTEon/N8fRmE8VzV85YmkbtFWgmPR85P0CQQCs\n"
"elWbN10EZZv3+q1wH7RsYzVgZX3yEhz3JcxJKkVzRCnKjYaUi6MweWN76vvbOq4K\n"
"G6Tiawm0Duh/K4ZmvyYVAkBppE5RRQqXiv1KF9bArcAJHvLm0vnHPpf1yIQr5bW6\n"
"njBuL4qcxlaKJVGRXT7yFtj2fj0gv3914jY2suWqp8XJ\n"
"-----END RSA PRIVATE KEY-----\n"
)
srv_private_key = parsePEMKey(srv_raw_key, private=True)
srv_cert_chain = X509CertChain([X509().parse(srv_raw_certificate)])
srv_record_layer._handshakeStart(client=False)
srv_record_layer.version = (3, 3)
for result in srv_record_layer._getMsg(ContentType.handshake, HandshakeType.client_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_client_hello = result
self.assertEqual(ClientHello, type(srv_client_hello))
srv_cipher_suite = CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA
srv_session_id = bytearray(0)
srv_server_hello = ServerHello().create(
(3, 3), bytearray(32), srv_session_id, srv_cipher_suite, CertificateType.x509, None, None
)
srv_msgs = []
srv_msgs.append(srv_server_hello)
srv_msgs.append(Certificate(CertificateType.x509).create(srv_cert_chain))
srv_msgs.append(ServerHelloDone())
for result in srv_record_layer._sendMsgs(srv_msgs):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._versionCheck = True
#
# client part
#
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.server_hello):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello = result
self.assertEqual(ServerHello, type(server_hello))
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.certificate, CertificateType.x509):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_certificate = result
self.assertEqual(Certificate, type(server_certificate))
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.server_hello_done):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_hello_done = result
self.assertEqual(ServerHelloDone, type(server_hello_done))
public_key = server_certificate.certChain.getEndEntityPublicKey()
premasterSecret = bytearray(48)
premasterSecret[0] = 3 # 'cause we negotiatied TLSv1.2
premasterSecret[1] = 3
encryptedPreMasterSecret = public_key.encrypt(premasterSecret)
client_key_exchange = ClientKeyExchange(CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, (3, 3))
client_key_exchange.createRSA(encryptedPreMasterSecret)
for result in record_layer._sendMsg(client_key_exchange):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
master_secret = calcMasterSecret(
(3, 3), CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, premasterSecret, client_hello.random, server_hello.random
)
record_layer._calcPendingStates(
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA, master_secret, client_hello.random, server_hello.random, None
)
for result in record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
record_layer._changeWriteState()
handshake_hashes = record_layer._handshake_hash.digest("sha256")
verify_data = PRF_1_2(master_secret, b"client finished", handshake_hashes, 12)
finished = Finished((3, 3)).create(verify_data)
for result in record_layer._sendMsg(finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
#
# server part
#
for result in srv_record_layer._getMsg(
ContentType.handshake, HandshakeType.client_key_exchange, srv_cipher_suite
):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_client_key_exchange = result
srv_premaster_secret = srv_private_key.decrypt(srv_client_key_exchange.encryptedPreMasterSecret)
self.assertEqual(bytearray(b"\x03\x03" + b"\x00" * 46), srv_premaster_secret)
srv_master_secret = calcMasterSecret(
srv_record_layer.version,
CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
srv_premaster_secret,
srv_client_hello.random,
srv_server_hello.random,
)
srv_record_layer._calcPendingStates(
srv_cipher_suite, srv_master_secret, srv_client_hello.random, srv_server_hello.random, None
)
for result in srv_record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(srv_change_cipher_spec))
srv_record_layer._changeReadState()
srv_handshakeHashes = srv_record_layer._handshake_hash.digest("sha256")
srv_verify_data = PRF_1_2(srv_master_secret, b"client finished", srv_handshakeHashes, 12)
for result in srv_record_layer._getMsg(ContentType.handshake, HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_finished = result
self.assertEqual(Finished, type(srv_finished))
self.assertEqual(srv_verify_data, srv_finished.verify_data)
for result in srv_record_layer._sendMsg(ChangeCipherSpec()):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._changeWriteState()
srv_handshakeHashes = srv_record_layer._handshake_hash.digest("sha256")
srv_verify_data = PRF_1_2(srv_master_secret, b"server finished", srv_handshakeHashes, 12)
for result in srv_record_layer._sendMsg(Finished((3, 3)).create(srv_verify_data)):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
srv_record_layer._handshakeDone(resumed=False)
#
# client part
#
for result in record_layer._getMsg(ContentType.change_cipher_spec):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
change_cipher_spec = result
self.assertEqual(ChangeCipherSpec, type(change_cipher_spec))
record_layer._changeReadState()
handshake_hashes = record_layer._handshake_hash.digest("sha256")
server_verify_data = PRF_1_2(master_secret, b"server finished", handshake_hashes, 12)
for result in record_layer._getMsg(ContentType.handshake, HandshakeType.finished):
if result in (0, 1):
raise Exception("blocking socket")
else:
break
server_finished = result
self.assertEqual(Finished, type(server_finished))
self.assertEqual(server_verify_data, server_finished.verify_data)
record_layer._handshakeDone(resumed=False)
# try sending data
record_layer.write(bytearray(b"text\n"))
# try recieving data
data = srv_record_layer.read(10)
self.assertEqual(data, bytearray(b"text\n"))
record_layer.close()
srv_record_layer.close()
def handshakeProxy(c_conn, s_conn, oracle):
s_conn._handshakeStart(client=False)
c_conn._handshakeStart(client=True)
s_settings = HandshakeSettings()
c_settings = HandshakeSettings()
# CLIENT HELLO C -> S
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.client_hello):
if result in (0,1): yield result
else: break
clientHello = result
c_conn.version = (3, 1) # Hardcoded version
for result in c_conn._sendMsg(clientHello):
yield result
# Send Server Hello, Certificate and Server Hello Done in one packet
s_conn.sock.buffer_writes = True
# SERVER HELLO S -> C
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.server_hello):
if result in (0,1): yield result
else: break
serverHello = result
s_conn.version = serverHello.server_version
cipherSuite = serverHello.cipher_suite
for result in s_conn._sendMsg(serverHello):
yield result
# CERTIFICATE S -> C
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.certificate,
serverHello.certificate_type): # FIXME : we should only allow RSA
if result in (0,1): yield result
else: break
serverCertificate = result
for result in s_conn._sendMsg(serverCertificate):
yield result
# CERTIFICATE REQUEST S -> C
if 0:
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.certificate_request):
if result in (0,1): yield result
else: break
certificate_request = result
for result in s_conn._sendMsg(certificate_request):
yield result
# SERVER HELLO DONE S -> C
for result in c_conn._getMsg(ContentType.handshake,
HandshakeType.server_hello_done):
if result in (0,1): yield result
else: break
serverHelloDone = result
for result in s_conn._sendMsg(serverHelloDone):
yield result
s_conn.sock.flush()
s_conn.sock.buffer_writes = False
# Send Client Key Exchange, Change Cipher Spec, Finished in one message
c_conn.sock.buffer_writes = True
# CERTIFICATE C -> S
if 0:
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.certificate,
serverHello.certificate_type): # FIXME : we should allow anything ?
if result in (0,1): yield result
else: break
clientCertificate = result
for result in c_conn._sendMsg(clientCertificate):
yield result
# CLIENT KEY EXCHANGE C -> S
for result in s_conn._getMsg(ContentType.handshake,
HandshakeType.client_key_exchange,
cipherSuite):
if result in (0,1): yield result
else: break
clientKeyExchange = result
# Ask the oracle if we continue
epms = clientKeyExchange.encryptedPreMasterSecret
if not oracle(epms):
# YOU SHALL NOT PASS !
print("Shall not pass")
return
print("Decoding phase")
# Decrypt master key
dec = subprocess.Popen(['./decrypt', '{}:{}'.format(*oracleaddr), cert], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
dec.stdin.write(hexlify(epms) + b'\n')
dec.stdin.close()
res = dec.stdout.readline().strip().split()[-1]
dec.stdout.close()
print(res)
premasterSecret = unhexlify(res)
# If it's ok, continue
for result in c_conn._sendMsg(clientKeyExchange):
yield result
settings = HandshakeSettings()
masterSecret = calcMasterSecret(c_conn.version,
cipherSuite,
premasterSecret,
clientHello.random,
serverHello.random)
print(masterSecret)
s_conn._calcPendingStates(cipherSuite, masterSecret,
clientHello.random, serverHello.random,
settings.cipherImplementations)
c_conn._calcPendingStates(cipherSuite, masterSecret,
clientHello.random, serverHello.random,
settings.cipherImplementations)
print('foobar')
# CHANGE-CIPHER-SPEC C -> S
for result in s_conn._getMsg(ContentType.change_cipher_spec):
if result in (0,1):
yield result
s_changeCipherSpec = result
for result in c_conn._sendMsg(s_changeCipherSpec):
yield result
s_conn._changeReadState()
c_conn._changeWriteState()
# SERVER-FINISHED C -> S
for result in s_conn._getMsg(ContentType.handshake, HandshakeType.finished):
if result in (0,1):
yield result
server_finished = result
for result in c_conn._sendMsg(server_finished):
yield result
c_conn.sock.flush()
c_conn.sock.buffer_writes = False
# Send New Session Ticket, Change Cipher Spec, Finished in one message
s_conn.sock.buffer_writes = True
# NEW-SESSION-TICKET
for result in c_conn._getMsg(ContentType.handshake, HandshakeType.new_session_ticket):
if result in (0,1):
yield result
newSessionTicket = result
for result in s_conn._sendMsg(newSessionTicket):
yield result
# CHANGE-CIPHER-SPEC
for result in c_conn._getMsg(ContentType.change_cipher_spec):
if result in (0,1):
yield result
c_changeCipherSpec = result
for result in s_conn._sendMsg(c_changeCipherSpec):
yield result
c_conn._changeReadState()
s_conn._changeWriteState()
# SERVER-FINISHED
for result in c_conn._getMsg(ContentType.handshake, HandshakeType.finished):
if result in (0,1):
yield result
client_finished = result
for result in s_conn._sendMsg(client_finished):
yield result
s_conn.sock.flush()
s_conn.sock.buffer_writes = False
c_conn._handshakeDone(False)
s_conn._handshakeDone(False)
cont = True
while cont:
for c_data, s_data in zip(c_conn.readAsync(), s_conn.readAsync()):
if c_data in (0, 1):
yield c_data
elif not c_data:
# End connection
print('server ended')
cont = False
else:
print('c', c_data)
for result in s_conn.writeAsync(c_data):
yield result
if s_data in (0, 1):
yield s_data
elif not s_data:
# End connection
print('client ended')
cont = False
else:
print('s', s_data)
for result in c_conn.writeAsync(s_data):
yield result
c_conn.close()
s_conn.close()
print("The end")
