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Whitespace in ike.lua.

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david
2013-06-18 03:44:32 +00:00
parent 1614b7f594
commit af5f103b5f
1 changed files with 114 additions and 98 deletions
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130
nselib/ike.lua
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@@ -15,14 +15,14 @@ The current funcionality includes:
1. Generating a Main or Aggressive Mode IKE request packet with a variable amount of transforms and a vpn group. 1. Generating a Main or Aggressive Mode IKE request packet with a variable amount of transforms and a vpn group.
2. Sending a packet 2. Sending a packet
3. Receiving the response 3. Receiving the response
4. Parsing the response for VIDs 4. Parsing the response for VIDs
5. Searching for the VIDs in 'ike-fingerprints.lua' 5. Searching for the VIDs in 'ike-fingerprints.lua'
6. returning a parsed info table 6. returning a parsed info table
This library is meant for extension, which could include: This library is meant for extension, which could include:
1. complete parsing of the response packet (might allow for better fingerprinting) 1. complete parsing of the response packet (might allow for better fingerprinting)
2. adding more options to the request packet 2. adding more options to the request packet
vendor field (might give better fingerprinting of services, e.g. Checkpoint) vendor field (might give better fingerprinting of services, e.g. Checkpoint)
3. backoff pattern analyses 3. backoff pattern analyses
... ...
@@ -36,28 +36,47 @@ author = "Jesper Kueckelhahn"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html" license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"} categories = {"discovery", "safe"}
local enc_methods = { local enc_methods = {
["des"] = 0x80010001, ["des"] = 0x80010001,
["3des"] = 0x80010005, ["3des"] = 0x80010005,
["aes/128"]= { 0x80010007, 0x800E0080 }, ["aes/128"] = { 0x80010007, 0x800E0080 },
["aes/192"]= { 0x80010007, 0x800E00C0 }, ["aes/192"] = { 0x80010007, 0x800E00C0 },
["aes/256"]= { 0x80010007, 0x800E0100 } ["aes/256"] = { 0x80010007, 0x800E0100 },
} }
local authentication= {
["psk"] = 0x80030001,
["rsa"] = 0x80030003,
["Hybrid"] = 0x8003FADD,
["XAUTH"] = 0x8003FDE9,
}
local authentication= { ["psk"] = 0x80030001, ["rsa"] = 0x80030003, ["Hybrid"] = 0x8003FADD, ["XAUTH"] = 0x8003FDE9} local hash_algo = {
["md5"] = 0x80020001,
["sha1"] = 0x80020002,
}
local hash_algo = { ["md5"] = 0x80020001, ["sha1"] = 0x80020002} local group_desc = {
local group_desc = { ["768"] = 0x80040001, ["1024"] = 0x80040002, ["1536"]= 0x80040005} ["768"] = 0x80040001,
local exchange_mode = { ["Main"] = 0x02, ["Aggressive"]= 0x04} ["1024"] = 0x80040002,
local protocol_ids = { ["tcp"] = "06", ["udp"]= "11"} ["1536"] = 0x80040005,
}
local exchange_mode = {
["Main"] = 0x02,
["Aggressive"] = 0x04,
}
local protocol_ids = {
["tcp"] = "06",
["udp"] = "11",
}
-- Response packet types -- Response packet types
local response_exchange_type = { local response_exchange_type = {
["02"] = "Main", ["02"] = "Main",
["04"] = "Aggressive", ["04"] = "Aggressive",
["05"] = "Informational" ["05"] = "Informational",
} }
-- Payload names -- Payload names
@@ -69,7 +88,7 @@ local payloads = {
["05"] = "ID", ["05"] = "ID",
["08"] = "Hash", ["08"] = "Hash",
["0A"] = "Nonce", ["0A"] = "Nonce",
["0D"] = "VID" ["0D"] = "VID",
} }
@@ -125,7 +144,6 @@ end
-- --
local function convert_to_hex(id) local function convert_to_hex(id)
local hex_str = "" local hex_str = ""
for c in string.gmatch(id, ".") do for c in string.gmatch(id, ".") do
hex_str = hex_str .. string.format("%X", c:byte()) hex_str = hex_str .. string.format("%X", c:byte())
end end
@@ -140,8 +158,8 @@ local function extract_payloads(packet)
if packet:len() < 61 then return {} end if packet:len() < 61 then return {} end
local np = packet:sub(33,34) -- next payload local np = packet:sub(33,34) -- next payload
local index = 61 -- starting point for search local index = 61 -- starting point for search
local ike_headers = {} -- ike headers local ike_headers = {} -- ike headers
local payload = '' local payload = ''
-- loop over packet -- loop over packet
@@ -217,7 +235,6 @@ local function lookup(vendor_ids)
-- Only store the first match -- Only store the first match
if info.vendor == nil then if info.vendor == nil then
-- the fingerprint contains information about the VID -- the fingerprint contains information about the VID
info.vendor = row info.vendor = row
@@ -379,25 +396,24 @@ local function generate_aggressive(port, protocol, id, diffie)
key_length = 128 key_length = 128
end end
return bin.pack(">SHHSSHSHCHHH", return bin.pack(">SHHSSHSHCHHH",
-- Key Exchange -- Key Exchange
0x0a00 , -- Next payload (Nonce) 0x0a00 , -- Next payload (Nonce)
string.format("%04X", key_length+4) , -- Length (132-bit) string.format("%04X", key_length+4) , -- Length (132-bit)
generate_random(key_length) , -- Random key data generate_random(key_length) , -- Random key data
-- Nonce -- Nonce
0x0500 , -- Next payload (Identification) 0x0500 , -- Next payload (Identification)
0x0018 , -- Length (24) 0x0018 , -- Length (24)
generate_random(20) , -- Nonce data generate_random(20) , -- Nonce data
-- Identification -- Identification
0x0000 , -- Next Payload (None) 0x0000 , -- Next Payload (None)
id_len , -- Payload length (id + 8) id_len , -- Payload length (id + 8)
0x03 , -- ID Type (USER_FQDN) 0x03 , -- ID Type (USER_FQDN)
hex_prot , -- Protocol ID (UDP) hex_prot , -- Protocol ID (UDP)
hex_port , -- Port (500) hex_port , -- Port (500)
convert_to_hex(id) -- Id Data (as hex) convert_to_hex(id) -- Id Data (as hex)
) )
end end
@@ -435,12 +451,12 @@ local function generate_transform(auth, encryption, hash, group, number, total)
next_payload , -- Next payload next_payload , -- Next payload
trans_length , -- Transform length trans_length , -- Transform length
payload_number , -- Transform number payload_number , -- Transform number
0x01 , -- Transform ID (IKE) 0x01 , -- Transform ID (IKE)
0x0000 , -- spacers ? 0x0000 , -- spacers ?
enc , -- Encryption algorithm enc , -- Encryption algorithm
hash_algo[hash] , -- Hash algorithm hash_algo[hash] , -- Hash algorithm
authentication[auth], -- Authentication method authentication[auth] , -- Authentication method
group_desc[group] -- Group Description group_desc[group] -- Group Description
) )
if key_length ~= nil then if key_length ~= nil then
@@ -448,8 +464,8 @@ local function generate_transform(auth, encryption, hash, group, number, total)
end end
trans = trans .. bin.pack(">IL", trans = trans .. bin.pack(">IL",
0x800b0001 , -- Life type (seconds) 0x800b0001 , -- Life type (seconds)
0x000c000400007080 -- Life duration (28800) 0x000c000400007080 -- Life duration (28800)
) )
return trans return trans
@@ -457,7 +473,7 @@ end
-- Generate multiple transforms -- Generate multiple transforms
-- Input nust be a table of complete transforms -- Input nust be a table of complete transforms
-- --
local function generate_transforms(transform_table) local function generate_transforms(transform_table)
local transforms = '' local transforms = ''
@@ -500,26 +516,26 @@ function request(port, proto, mode, transforms, diffie, id)
local packet = bin.pack(">HLCCCCIHSHIISHCCCH", local packet = bin.pack(">HLCCCCIHSHIISHCCCH",
generate_random(8) , -- Initiator cookie generate_random(8) , -- Initiator cookie
0x0000000000000000 , -- Responder cookie 0x0000000000000000 , -- Responder cookie
0x01 , -- Next payload (SA) 0x01 , -- Next payload (SA)
0x10 , -- Version 0x10 , -- Version
exchange_mode[mode] , -- Exchange type exchange_mode[mode] , -- Exchange type
0x00 , -- Flags 0x00 , -- Flags
0x00000000 , -- Message id 0x00000000 , -- Message id
l , -- packet length l , -- packet length
--# Security Association -- Security Association
payload_after_sa , -- Next payload (Key exchange, if aggressive mode) payload_after_sa , -- Next payload (Key exchange, if aggressive mode)
l_sa , -- Length l_sa , -- Length
0x00000001 , -- IPSEC 0x00000001 , -- IPSEC
0x00000001 , -- Situation 0x00000001 , -- Situation
--## Proposal --## Proposal
0x0000 , -- Next payload (None) 0x0000 , -- Next payload (None)
l_pro , -- Payload length l_pro , -- Payload length
0x01 , -- Proposal number 0x01 , -- Proposal number
0x01 , -- Protocol ID (ISAKMP) 0x01 , -- Protocol ID (ISAKMP)
0x00 , -- SPI Size 0x00 , -- SPI Size
number_transforms -- Proposal transforms number_transforms -- Proposal transforms
) )