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|
% Tests for RFC5925 TCP Authentication Option (TCP-AO)
~ tcp tcpao
# Some data from https://datatracker.ietf.org/doc/html/draft-touch-tcpm-ao-test-vectors-02
+ Test Utilities
= Test Utilities
# Tolerate all whitespace like py37+ bytes.fromhex
def fromhex(hex):
return bytes(bytearray.fromhex(hex.replace(" ", "").replace("\n", "")))
+ TCP-AO Test Vectors
= TCP-AO Test Vectors Utilities
from scapy.contrib import tcpao
master_key = b"testvector"
client_keyid = 61
server_keyid = 84
def check(
packet_hex,
traffic_key_hex,
mac_hex,
src_isn,
dst_isn,
include_options=True,
alg_name="HMAC-SHA-1-96",
sne=0,
):
packet_bytes = fromhex(packet_hex)
# sanity check for ip version
ipv = orb(packet_bytes[0]) >> 4
if ipv == 4:
p = IP(fromhex(packet_hex))
assert p[IP].proto == socket.IPPROTO_TCP
elif ipv == 6:
p = IPv6(fromhex(packet_hex))
assert p[IPv6].nh == socket.IPPROTO_TCP
else:
raise ValueError("bad ipv={}".format(ipv))
# sanity check for seq/ack in SYN/ACK packets
if p[TCP].flags.S and p[TCP].flags.A is False:
assert p[TCP].seq == src_isn
assert p[TCP].ack == 0
if p[TCP].flags.S and p[TCP].flags.A:
assert p[TCP].seq == src_isn
assert p[TCP].ack == dst_isn + 1
# check option bytes in header
opt = get_tcpao(p[TCP])
assert opt is not None
assert opt.keyid in [client_keyid, server_keyid]
assert opt.rnextkeyid in [client_keyid, server_keyid]
assert opt.mac == fromhex(mac_hex), "match parsed mac"
# check traffic key
alg = get_alg(alg_name)
context_bytes = tcpao.build_context_from_packet(p, src_isn, dst_isn)
traffic_key = alg.kdf(master_key, context_bytes)
assert traffic_key == fromhex(traffic_key_hex), "match traffic key"
# check mac
message_bytes = tcpao.build_message_from_packet(
p, include_options=include_options, sne=sne
)
mac = alg.mac(traffic_key, message_bytes)
assert mac == fromhex(mac_hex), "match computed mac"
= TCP-AO Test Vector 4.1.1: SHA-1 Send Syn
client_isn_41x = 0xFBFBAB5A
server_isn_41x = 0x11C14261
check(
"""
45 e0 00 4c dd 0f 40 00 ff 06 bf 6b 0a 0b 0c 0d
ac 1b 1c 1d e9 d7 00 b3 fb fb ab 5a 00 00 00 00
e0 02 ff ff ca c4 00 00 02 04 05 b4 01 03 03 08
04 02 08 0a 00 15 5a b7 00 00 00 00 1d 10 3d 54
2e e4 37 c6 f8 ed e6 d7 c4 d6 02 e7
""",
"6d 63 ef 1b 02 fe 15 09 d4 b1 40 27 07 fd 7b 04 16 ab b7 4f",
"2e e4 37 c6 f8 ed e6 d7 c4 d6 02 e7",
client_isn_41x,
0,
)
= TCP-AO Test Vector 4.1.2 SHA-1 Recv Syn-Ack
check(
"""
45 e0 00 4c 65 06 40 00 ff 06 37 75 ac 1b 1c 1d
0a 0b 0c 0d 00 b3 e9 d7 11 c1 42 61 fb fb ab 5b
e0 12 ff ff 37 76 00 00 02 04 05 b4 01 03 03 08
04 02 08 0a 84 a5 0b eb 00 15 5a b7 1d 10 54 3d
ee ab 0f e2 4c 30 10 81 51 16 b3 be
""",
"d9 e2 17 e4 83 4a 80 ca 2f 3f d8 de 2e 41 b8 e6 79 7f ea 96",
"ee ab 0f e2 4c 30 10 81 51 16 b3 be",
server_isn_41x,
client_isn_41x,
)
= TCP-AO Test Vector 4.1.3 SHA-1 Send Other
check(
"""
45 e0 00 87 36 a1 40 00 ff 06 65 9f 0a 0b 0c 0d
ac 1b 1c 1d e9 d7 00 b3 fb fb ab 5b 11 c1 42 62
c0 18 01 04 a1 62 00 00 01 01 08 0a 00 15 5a c1
84 a5 0b eb 1d 10 3d 54 70 64 cf 99 8c c6 c3 15
c2 c2 e2 bf ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff 00 43 01 04 da bf 00 b4 0a 0b 0c 0d
26 02 06 01 04 00 01 00 01 02 02 80 00 02 02 02
00 02 02 42 00 02 06 41 04 00 00 da bf 02 08 40
06 00 64 00 01 01 00
""",
"d2 e5 9c 65 ff c7 b1 a3 93 47 65 64 63 b7 0e dc 24 a1 3d 71",
"70 64 cf 99 8c c6 c3 15 c2 c2 e2 bf",
client_isn_41x,
server_isn_41x,
)
= TCP-AO Test Vector 4.1.4 SHA-1 Recv Other
check(
"""
45 e0 00 87 1f a9 40 00 ff 06 7c 97 ac 1b 1c 1d
0a 0b 0c 0d 00 b3 e9 d7 11 c1 42 62 fb fb ab 9e
c0 18 01 00 40 0c 00 00 01 01 08 0a 84 a5 0b f5
00 15 5a c1 1d 10 54 3d a6 3f 0e cb bb 2e 63 5c
95 4d ea c7 ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff 00 43 01 04 da c0 00 b4 ac 1b 1c 1d
26 02 06 01 04 00 01 00 01 02 02 80 00 02 02 02
00 02 02 42 00 02 06 41 04 00 00 da c0 02 08 40
06 00 64 00 01 01 00
""",
"d9 e2 17 e4 83 4a 80 ca 2f 3f d8 de 2e 41 b8 e6 79 7f ea 96",
"a6 3f 0e cb bb 2e 63 5c 95 4d ea c7",
server_isn_41x,
client_isn_41x,
)
= TCP-AO Test Vector 4.2.1
client_isn_42x = 0xCB0EFBEE
server_isn_42x = 0xACD5B5E1
check(
"""
45 e0 00 4c 53 99 40 00 ff 06 48 e2 0a 0b 0c 0d
ac 1b 1c 1d ff 12 00 b3 cb 0e fb ee 00 00 00 00
e0 02 ff ff 54 1f 00 00 02 04 05 b4 01 03 03 08
04 02 08 0a 00 02 4c ce 00 00 00 00 1d 10 3d 54
80 af 3c fe b8 53 68 93 7b 8f 9e c2
""",
"30 ea a1 56 0c f0 be 57 da b5 c0 45 22 9f b1 0a 42 3c d7 ea",
"80 af 3c fe b8 53 68 93 7b 8f 9e c2",
client_isn_42x,
0,
include_options=False,
)
= TCP-AO Test Vector 4.2.2
check(
"""
45 e0 00 4c 32 84 40 00 ff 06 69 f7 ac 1b 1c 1d
0a 0b 0c 0d 00 b3 ff 12 ac d5 b5 e1 cb 0e fb ef
e0 12 ff ff 38 8e 00 00 02 04 05 b4 01 03 03 08
04 02 08 0a 57 67 72 f3 00 02 4c ce 1d 10 54 3d
09 30 6f 9a ce a6 3a 8c 68 cb 9a 70
""",
"b5 b2 89 6b b3 66 4e 81 76 b0 ed c6 e7 99 52 41 01 a8 30 7f",
"09 30 6f 9a ce a6 3a 8c 68 cb 9a 70",
server_isn_42x,
client_isn_42x,
include_options=False,
)
= TCP-AO Test Vector 4.2.3
check(
"""
45 e0 00 87 a8 f5 40 00 ff 06 f3 4a 0a 0b 0c 0d
ac 1b 1c 1d ff 12 00 b3 cb 0e fb ef ac d5 b5 e2
c0 18 01 04 6c 45 00 00 01 01 08 0a 00 02 4c ce
57 67 72 f3 1d 10 3d 54 71 06 08 cc 69 6c 03 a2
71 c9 3a a5 ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff 00 43 01 04 da bf 00 b4 0a 0b 0c 0d
26 02 06 01 04 00 01 00 01 02 02 80 00 02 02 02
00 02 02 42 00 02 06 41 04 00 00 da bf 02 08 40
06 00 64 00 01 01 00
""",
"f3 db 17 93 d7 91 0e cd 80 6c 34 f1 55 ea 1f 00 34 59 53 e3",
"71 06 08 cc 69 6c 03 a2 71 c9 3a a5",
client_isn_42x,
server_isn_42x,
include_options=False,
)
= TCP-AO Test Vector 4.2.4
check(
"""
45 e0 00 87 54 37 40 00 ff 06 48 09 ac 1b 1c 1d
0a 0b 0c 0d 00 b3 ff 12 ac d5 b5 e2 cb 0e fc 32
c0 18 01 00 46 b6 00 00 01 01 08 0a 57 67 72 f3
00 02 4c ce 1d 10 54 3d 97 76 6e 48 ac 26 2d e9
ae 61 b4 f9 ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff 00 43 01 04 da c0 00 b4 ac 1b 1c 1d
26 02 06 01 04 00 01 00 01 02 02 80 00 02 02 02
00 02 02 42 00 02 06 41 04 00 00 da c0 02 08 40
06 00 64 00 01 01 00
""",
"b5 b2 89 6b b3 66 4e 81 76 b0 ed c6 e7 99 52 41 01 a8 30 7f",
"97 76 6e 48 ac 26 2d e9 ae 61 b4 f9",
server_isn_42x,
client_isn_42x,
include_options=False,
)
= TCP-AO Test Vector 5.1.1
check(
"""
45 e0 00 4c 7b 9f 40 00 ff 06 20 dc 0a 0b 0c 0d
ac 1b 1c 1d c4 fa 00 b3 78 7a 1d df 00 00 00 00
e0 02 ff ff 5a 0f 00 00 02 04 05 b4 01 03 03 08
04 02 08 0a 00 01 7e d0 00 00 00 00 1d 10 3d 54
e4 77 e9 9c 80 40 76 54 98 e5 50 91
""",
"f5 b8 b3 d5 f3 4f db b6 eb 8d 4a b9 66 0e 60 e3",
"e4 77 e9 9c 80 40 76 54 98 e5 50 91",
0x787A1DDF,
0,
include_options=True,
alg_name="AES-128-CMAC-96",
)
= TCP-AO Test Vector 6.1.1
client_isn_61x = 0x176A833F
server_isn_61x = 0x3F51994B
check(
"""
6e 08 91 dc 00 38 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 f7 e4 00 b3 17 6a 83 3f
00 00 00 00 e0 02 ff ff 47 21 00 00 02 04 05 a0
01 03 03 08 04 02 08 0a 00 41 d0 87 00 00 00 00
1d 10 3d 54 90 33 ec 3d 73 34 b6 4c 5e dd 03 9f
""",
"62 5e c0 9d 57 58 36 ed c9 b6 42 84 18 bb f0 69 89 a3 61 bb",
"90 33 ec 3d 73 34 b6 4c 5e dd 03 9f",
client_isn_61x,
0,
include_options=True,
)
= TCP-AO Test Vector 6.1.2
check(
"""
6e 01 00 9e 00 38 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00 b3 f7 e4 3f 51 99 4b
17 6a 83 40 e0 12 ff ff bf ec 00 00 02 04 05 a0
01 03 03 08 04 02 08 0a bd 33 12 9b 00 41 d0 87
1d 10 54 3d f1 cb a3 46 c3 52 61 63 f7 1f 1f 55
""",
"e4 a3 7a da 2a 0a fc a8 71 14 34 91 3f e1 38 c7 71 eb cb 4a",
"f1 cb a3 46 c3 52 61 63 f7 1f 1f 55",
server_isn_61x,
client_isn_61x,
include_options=True,
)
= TCP-AO Test Vector 6.2.2
client_isn_62x = 0x020C1E69
server_isn_62x = 0xEBA3734D
check(
"""
6e 0a 7e 1f 00 38 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00 b3 c6 cd eb a3 73 4d
02 0c 1e 6a e0 12 ff ff 77 4d 00 00 02 04 05 a0
01 03 03 08 04 02 08 0a 5e c9 9b 70 00 9d b9 5b
1d 10 54 3d 3c 54 6b ad 97 43 f1 2d f8 b8 01 0d
""",
"40 51 08 94 7f 99 65 75 e7 bd bc 26 d4 02 16 a2 c7 fa 91 bd",
"3c 54 6b ad 97 43 f1 2d f8 b8 01 0d",
server_isn_62x,
client_isn_62x,
include_options=False,
)
= TCP-AO Test Vector 6.2.4
check(
"""
6e 0a 7e 1f 00 73 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00 b3 c6 cd eb a3 73 4e
02 0c 1e ad c0 18 01 00 71 6a 00 00 01 01 08 0a
5e c9 9b 7a 00 9d b9 65 1d 10 54 3d 55 9a 81 94
45 b4 fd e9 8d 9e 13 17 ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff 00 43 01 04 fd e8 00 b4
01 01 01 7a 26 02 06 01 04 00 01 00 01 02 02 80
00 02 02 02 00 02 02 42 00 02 06 41 04 00 00 fd
e8 02 08 40 06 00 64 00 01 01 00
""",
"40 51 08 94 7f 99 65 75 e7 bd bc 26 d4 02 16 a2 c7 fa 91 bd",
"55 9a 81 94 45 b4 fd e9 8d 9e 13 17",
server_isn_62x,
client_isn_62x,
include_options=False,
)
= TCP-AO Test Vector 7.1.2
server_isn_71x = 0xA6744ECB
client_isn_71x = 0x193CCCEC
check(
"""
6e 06 15 20 00 38 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00 b3 f8 5a a6 74 4e cb
19 3c cc ed e0 12 ff ff ea bb 00 00 02 04 05 a0
01 03 03 08 04 02 08 0a 71 da ab c8 13 e4 ab 99
1d 10 54 3d dc 28 43 a8 4e 78 a6 bc fd c5 ed 80
""",
"cf 1b 1e 22 5e 06 a6 36 16 76 4a 06 7b 46 f4 b1",
"dc 28 43 a8 4e 78 a6 bc fd c5 ed 80",
server_isn_71x,
client_isn_71x,
alg_name="AES-128-CMAC-96",
include_options=True,
)
= TCP-AO Test Vector 7.1.4
check(
"""
6e 06 15 20 00 73 06 40 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 02 fd 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00 b3 f8 5a a6 74 4e cc
19 3c cd 30 c0 18 01 00 52 f4 00 00 01 01 08 0a
71 da ab d3 13 e4 ab a3 1d 10 54 3d c1 06 9b 7d
fd 3d 69 3a 6d f3 f2 89 ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff 00 43 01 04 fd e8 00 b4
01 01 01 7a 26 02 06 01 04 00 01 00 01 02 02 80
00 02 02 02 00 02 02 42 00 02 06 41 04 00 00 fd
e8 02 08 40 06 00 64 00 01 01 00
""",
"cf 1b 1e 22 5e 06 a6 36 16 76 4a 06 7b 46 f4 b1",
"c1 06 9b 7d fd 3d 69 3a 6d f3 f2 89",
server_isn_71x,
client_isn_71x,
alg_name="AES-128-CMAC-96",
include_options=True,
)
+ TCP-AO Signature API
= TCP-AO sign SYN packet build from scratch
master_key = b"hello"
alg = TCPAOAlg_HMAC_SHA1()
keyid = 12
rnextkeyid = 34
p = IP() / TCP()
p[TCP].flags == "S"
sisn = p[TCP].seq
disn = 0
# sign
traffic_key = calc_tcpao_traffic_key(p, alg, master_key, sisn, disn)
sign_tcpao(p, alg, traffic_key, keyid, rnextkeyid)
mac = calc_tcpao_mac(p, alg, traffic_key)
# parse
p2 = IP(raw(p))
ao = get_tcpao(p2[TCP])
ao is not None
ao.keyid == keyid
ao.rnextkeyid == rnextkeyid
ao.mac == mac
# calculate signature again on parsed packet
traffic_key2 = calc_tcpao_traffic_key(p2, alg, master_key, p2[TCP].seq, 0)
traffic_key == traffic_key2
mac2 = calc_tcpao_mac(p2, alg, traffic_key2)
mac == mac2
|
