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Modified smbauth.lua to create ntlmv2 session response.

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http.lua now allows NTLM authentication.
This commit is contained in:
gyani
2015-07-04 08:19:17 +00:00
parent 8d9f304fbd
commit 3d2a008cef
2 changed files with 180 additions and 7 deletions
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28
nselib/smbauth.lua
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@@ -589,6 +589,26 @@ function ntlmv2_create_response(ntlm, username, domain, challenge, client_challe
return true, openssl.hmac("MD5", ntlmv2_hash, challenge .. client_challenge) .. client_challenge
end
--- Generates the ntlmv2 session response.
-- It starts by generatng an 8 byte random client nonce, it is padded to 24 bytes.
-- The padded value is the lanman response. A session nonce is made by
-- concatenating the server challenge and the client nonce. The ntlm session hash
-- is first 8 bytes of the md5 hash of the session nonce.
-- The ntlm response is the lm response with session hash as challenge.
-- @param ntlm_passsword_hash The md4 hash of the utf-16 password.
-- @param challenge The challenge sent by the server.
function ntlmv2_session_response(ntlm_password_hash, challenge)
local client_nonce = openssl.rand_bytes(8)
local lm_response = client_nonce .. string.rep('\0', 24 - #client_nonce)
local session_nonce = challenge .. client_nonce
local ntlm_session_hash = openssl.md5(session_nonce):sub(1,8)
local status, ntlm_response = lm_create_response(ntlm_password_hash, ntlm_session_hash)
return status, lm_response, ntlm_response
end
---Generate the Lanman and NTLM password hashes.
--
-- The password itself is taken from the function parameters, the script
@@ -703,6 +723,9 @@ function get_password_response(ip, username, domain, password, password_hash, ha
status, lm_response = lmv2_create_response(ntlm_hash, username, domain, challenge)
ntlm_response = ""
elseif(hash_type == "ntlmv2_session") then
stdnse.debug2("SMB: Creating nltmv2 session response")
status, lm_response, ntlm_response = ntlmv2_session_response(ntlm_hash, challenge)
else
-- Default to NTLMv1
if(hash_type ~= nil) then
@@ -921,7 +944,6 @@ if not unittest.testing() then
end
test_suite = unittest.TestSuite:new()
if have_ssl then
test_suite:add_test(unittest.equal(
stdnse.tohex(select(-1, lm_create_hash("passphrase"))),
"855c3697d9979e78ac404c4ba2c66533"
@@ -946,9 +968,5 @@ test_suite:add_test(unittest.equal(
),
"ntlm_create_hash"
)
else
test_suite:add_test(unittest.is_false(lm_create_hash("a"), "lm_create_hash"))
test_suite:add_test(unittest.is_false(ntlm_create_hash("a"), "ntlm_create_hash"))
end
return _ENV;