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| json = require "json"
md5 = require "md5"
login_url = "/login"
success_code = 0
event_name = "login_audit"
event_type = "lua"
app_type = "web"
name = "web_login_audit.json"
http_common_mapping = '{"accept":"accept","accept-charset":"accept_charset","accept-encoding":"accept_encoding","accept-language":"accept_language","accept-datetime":"accept_datetime","authorization":"authorization","cache-control":"cache_control","from":"from","max-forwards":"max_forwards","origin":"origin","pragma":"pragma","proxy-authorization":"proxy_authorization","via":"via","vary":"vary","x-requested-with":"x_requested_with","x-forwarded-proto":"x_forwarded_proto","accept-range":"accept_range","allow":"allow","connection":"connection","content-encoding":"content_encoding","content-language":"content_language","content-location":"content_location","content-md5":"content_md5","content-range":"content_range","date":"date","last-modified":"last_modified","location":"location","proxy-authenticate":"proxy_authenticate","referrer":"refer","retry-after":"retry_after","server":"server","transfer-encoding":"transfer_encoding","upgrade":"upgrade","www-authenticate":"www_authenticate","x-authenticated-user":"x_authenticated_user","user-agent":"user_agent"}'
common_mapping_table = json.decode(http_common_mapping)
http_request_mapping = '{"content-length":"request_content_length","content-type":"request_content_type"}'
request_mapping_table = json.decode(http_request_mapping)
http_response_mapping = '{"content-length":"response_content_length","content-type":"response_content_type"}'
response_mapping_table = json.decode(http_response_mapping)
function md5Encode(args)
m = md5.new()
m:update(args)
return md5.tohex(m:finish())
end
function urlDecode(args)
s = string.gsub(args, "%%(%x%x)", function(h) return string.char(tonumber(h, 16)) end)
return s
end
function formatStr(args)
t = {}
data = string.split(args, '&')
for n, v in ipairs(data) do
d = string.split(v, '=')
t[d[1]] = d[2]
end
return t
end
function string.split(s, p)
local rt = {}
string.gsub(s, '[^'..p..']+', function(w) table.insert(rt, w) end )
return rt
end
function trim(s)
return (string.gsub(s, "^%s*(.-)%s*$", "%1"))
end
function formatCookie(args)
t = {}
data = string.split(args, ";")
for n, v in ipairs(data) do
v = trim(v)
d = string.split(v, "=")
t[d[1]] = d[2]
end
return t
end
function init (args)
local needs = {}
needs["protocol"] = "http"
return needs
end
function setup (args)
filename = SCLogPath() .. "/" .. name
file = assert(io.open(filename, "a"))
SCLogInfo("Web Login Log Filename " .. filename)
http = 0
end
function log(args)
http_table = {}
http_hostname = HttpGetRequestHost()
http_table["hostname"] = http_hostname
http_url = HttpGetRequestUriNormalized()
if http_url ~= login_url then
return
end
http_table["url"] = login_url
http_table["url_path"] = http_url
rl = HttpGetRequestLine()
http_method = string.match(rl, "%w+")
http_table["method"] = http_method
rsl = HttpGetResponseLine()
status_code = string.match(rsl, "%s(%d+)%s")
http_status = tonumber(status_code)
http_table["status"] = http_status
http_protocol = string.match(rsl, "(.-)%s")
http_table["protocol"] = http_protocol
cookie = HttpGetRequestHeader("Cookie")
if cookie ~= nil then
session_id = string.match(cookie, "sessionID=(.-);")
if session_id ~= nil then
http_table["request_token"] = md5Encode(session_id)
else
http_table["request_token"] = nil
end
end
set_cookie = HttpGetResponseHeader("Set-Cookie")
if set_cookie ~= nil then
session_id = string.match(set_cookie, "sessionID=(.-);")
http_table["response_token"] = md5Encode(session_id)
member_id = string.match(set_cookie, "memberId=(.-);")
http_table["member_id"] = tonumber(member_id)
end
a, o, e = HttpGetResponseBody()
for n, v in ipairs(a) do
body = json.decode(v)
results_code = tonumber(body["code"])
if results_code == success_code then
results = "success"
else
results = "failed"
end
end
http_table["results"] = results
http_table["results_code"] = results_code
a, o, e = HttpGetRequestBody()
for n, v in ipairs(a) do
res = formatStr(v)
mail = urlDecode(res['email'])
pass = md5Encode(res['password'])
end
http_table["email"] = mail
http_table["password"] = pass
rh = HttpGetRequestHeaders()
for k, v in pairs(rh) do
key = string.lower(k)
common_var = common_mapping_table[key]
if common_var ~= nil then
http_table[common_var] = v
end
request_var = request_mapping_table[key]
if request_var ~= nil then
http_table[request_var] = v
end
end
rsh = HttpGetResponseHeaders()
for k, v in pairs(rsh) do
key = string.lower(k)
common_var = common_mapping_table[key]
if common_var ~= nil then
http_table[common_var] = v
end
response_var = response_mapping_table[key]
if response_var ~= nil then
http_table[response_var] = v
end
end
sec, usec = SCPacketTimestamp()
timestring = os.date("!%Y-%m-%dT%T", sec) .. "." .. usec .. "+0000"
ip_version, src_ip, dst_ip, protocol, src_port, dst_port = SCFlowTuple()
id = SCFlowId()
flow_id = string.format("%.0f", id)
true_client_ip = HttpGetRequestHeader("True-Client-IP")
if true_client_ip ~= nil then
src_ip = true_client_ip
end
raw_data = {
timestamp = timestring,
flow_id = flow_id,
src_ip = src_ip,
src_port = src_port,
dest_ip = dst_ip,
dest_port = dst_port,
event_name = event_name,
event_type = event_type,
app_type = app_type,
http = http_table,
proto = "TCP"
}
data = json.encode(raw_data)
file:write(data .. "\n")
file:flush()
http = http + 1
end
function deinit (args)
SCLogInfo ("HTTP transactions logged: " .. http);
file:close(file)
end
|