mirror of
https://github.com/openappsec/attachment.git
synced 2025-12-31 05:39:07 +03:00
last modification....
This commit is contained in:
wiaamm
@@ -8,53 +8,39 @@ local NanoHandler = {}
|
||||
NanoHandler.PRIORITY = 3000
|
||||
NanoHandler.VERSION = "1.0.0"
|
||||
|
||||
NanoHandler.sessions = {}
|
||||
NanoHandler.processed_requests = {}
|
||||
|
||||
function NanoHandler.init_worker()
|
||||
nano.init_attachment()
|
||||
end
|
||||
|
||||
function NanoHandler.access(conf)
|
||||
local ctx = kong.ctx.plugin
|
||||
local headers = kong.request.get_headers()
|
||||
local session_id = nano.generate_session_id()
|
||||
kong.service.request.set_header("x-session-id", tostring(session_id))
|
||||
|
||||
if NanoHandler.processed_requests[session_id] then
|
||||
kong.ctx.plugin.blocked = true
|
||||
return
|
||||
end
|
||||
|
||||
local session_data = nano.init_session(session_id)
|
||||
if not session_data then
|
||||
kong.log.err("Failed to initialize session - failing open")
|
||||
ctx.session_data = nil
|
||||
ctx.session_id = nil
|
||||
ctx.cleanup_needed = false
|
||||
return
|
||||
end
|
||||
|
||||
kong.ctx.plugin.session_data = session_data
|
||||
kong.ctx.plugin.session_id = session_id
|
||||
ctx.session_data = session_data
|
||||
ctx.session_id = session_id
|
||||
|
||||
local meta_data = nano.handle_start_transaction()
|
||||
if not meta_data then
|
||||
kong.log.err("Failed to handle start transaction - failing open")
|
||||
nano.fini_session(session_data)
|
||||
nano.cleanup_all()
|
||||
-- collectgarbage("restart")
|
||||
-- collectgarbage("collect")
|
||||
kong.ctx.plugin.session_data = nil
|
||||
kong.ctx.plugin.session_id = nil
|
||||
ctx.cleanup_needed = true
|
||||
return
|
||||
end
|
||||
|
||||
local req_headers = nano.handleHeaders(headers)
|
||||
if not req_headers then
|
||||
kong.log.err("Failed to handle request headers - failing open")
|
||||
nano.fini_session(session_data)
|
||||
nano.cleanup_all()
|
||||
-- collectgarbage("restart")
|
||||
-- collectgarbage("collect")
|
||||
kong.ctx.plugin.session_data = nil
|
||||
kong.ctx.plugin.session_id = nil
|
||||
ctx.cleanup_needed = true
|
||||
return
|
||||
end
|
||||
|
||||
@@ -63,8 +49,7 @@ function NanoHandler.access(conf)
|
||||
|
||||
local verdict, response = nano.send_data(session_id, session_data, meta_data, req_headers, contains_body, nano.HttpChunkType.HTTP_REQUEST_FILTER)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
|
||||
@@ -73,8 +58,7 @@ function NanoHandler.access(conf)
|
||||
if body and #body > 0 then
|
||||
verdict, response = nano.send_body(session_id, session_data, body, nano.HttpChunkType.HTTP_REQUEST_BODY)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
else
|
||||
@@ -85,8 +69,7 @@ function NanoHandler.access(conf)
|
||||
kong.log.debug("Found request body in nginx var, size: ", #body_data)
|
||||
verdict, response = nano.send_body(session_id, session_data, body_data, nano.HttpChunkType.HTTP_REQUEST_BODY)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
else
|
||||
@@ -98,14 +81,11 @@ function NanoHandler.access(conf)
|
||||
local entire_body = file:read("*all")
|
||||
file:close()
|
||||
|
||||
if not entire_body then
|
||||
kong.log.err("Failed to read body file: ", body_file)
|
||||
elseif entire_body and #entire_body > 0 then
|
||||
if entire_body and #entire_body > 0 then
|
||||
kong.log.debug("Sending entire body of size ", #entire_body, " bytes to C module")
|
||||
verdict, response = nano.send_body(session_id, session_data, entire_body, nano.HttpChunkType.HTTP_REQUEST_BODY)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
else
|
||||
@@ -118,52 +98,33 @@ function NanoHandler.access(conf)
|
||||
end
|
||||
end
|
||||
|
||||
local verdict, response = nano.AttachmentVerdict.INSPECT, nil
|
||||
local ok, pcall_verdict, pcall_response = pcall(function()
|
||||
local ok, verdict, response = pcall(function()
|
||||
return nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_REQUEST_END)
|
||||
end)
|
||||
|
||||
if not ok then
|
||||
kong.log.err("Error ending request inspection: ", pcall_verdict, " - failing open")
|
||||
nano.fini_session(session_data)
|
||||
nano.cleanup_all()
|
||||
-- collectgarbage("restart")
|
||||
-- collectgarbage("collect")
|
||||
kong.ctx.plugin.session_data = nil
|
||||
kong.ctx.plugin.session_id = nil
|
||||
kong.log.err("Error ending request inspection - failing open")
|
||||
ctx.cleanup_needed = true
|
||||
return
|
||||
end
|
||||
|
||||
verdict, response = pcall_verdict, pcall_response
|
||||
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
local result = nano.handle_custom_response(session_data, response)
|
||||
nano.fini_session(session_data)
|
||||
nano.cleanup_all()
|
||||
-- collectgarbage("restart")
|
||||
-- collectgarbage("collect")
|
||||
kong.ctx.plugin.session_data = nil
|
||||
kong.ctx.plugin.session_id = nil
|
||||
return result
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
else
|
||||
verdict, response = nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_REQUEST_END)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
end
|
||||
|
||||
NanoHandler.processed_requests[session_id] = true
|
||||
end
|
||||
|
||||
function NanoHandler.header_filter(conf)
|
||||
local ctx = kong.ctx.plugin
|
||||
kong.log.err("header_filter: ctx.blocked=", ctx.blocked, " ctx.cleanup_needed=", ctx.cleanup_needed, " ctx.session_id=", ctx.session_id, " ctx.session_data=", ctx.session_data and "EXISTS" or "NIL")
|
||||
|
||||
if ctx.blocked or ctx.cleanup_needed then
|
||||
if ctx.cleanup_needed then
|
||||
kong.log.debug("Cleanup needed in header_filter, skipping processing")
|
||||
return
|
||||
end
|
||||
|
||||
@@ -171,7 +132,7 @@ function NanoHandler.header_filter(conf)
|
||||
local session_data = ctx.session_data
|
||||
|
||||
if not session_id or not session_data then
|
||||
kong.log.err("No session data found in header_filter - session_id:", session_id, " session_data:", session_data)
|
||||
kong.log.debug("No session data found in header_filter")
|
||||
return
|
||||
end
|
||||
|
||||
@@ -180,6 +141,7 @@ function NanoHandler.header_filter(conf)
|
||||
|
||||
if not header_data then
|
||||
kong.log.err("Failed to handle response headers - failing open")
|
||||
ctx.cleanup_needed = true
|
||||
return
|
||||
end
|
||||
|
||||
@@ -188,8 +150,7 @@ function NanoHandler.header_filter(conf)
|
||||
|
||||
local verdict, response = nano.send_response_headers(session_id, session_data, header_data, status_code, content_length)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.ctx.plugin.blocked = true
|
||||
kong.ctx.plugin.cleanup_needed = true
|
||||
ctx.cleanup_needed = true
|
||||
return nano.handle_custom_response(session_data, response)
|
||||
end
|
||||
|
||||
@@ -198,42 +159,31 @@ end
|
||||
|
||||
function NanoHandler.body_filter(conf)
|
||||
local ctx = kong.ctx.plugin
|
||||
local chunk = ngx.arg[1]
|
||||
local eof = ngx.arg[2]
|
||||
ctx.response_body_size = (ctx.response_body_size or 0) + (chunk and #chunk or 0)
|
||||
kong.log.err("Response body size so far: ", ctx.response_body_size)
|
||||
|
||||
--kong.log.err("body_filter START: ctx.blocked=", ctx.blocked, " ctx.cleanup_needed=", ctx.cleanup_needed, " ctx.session_id=", ctx.session_id, " ctx.session_data=", ctx.session_data and "EXISTS" or "NIL")
|
||||
|
||||
if ctx.blocked or ctx.cleanup_needed then
|
||||
kong.log.err("Fail-open mode - blocked/cleanup chunk without inspection, passing through")
|
||||
ngx.arg[1] = chunk
|
||||
if ctx.cleanup_needed then
|
||||
kong.log.debug("Cleanup needed in body_filter, skipping processing")
|
||||
return
|
||||
end
|
||||
|
||||
--kong.log.err("In body_filter phase")
|
||||
|
||||
local session_id = ctx.session_id
|
||||
local session_data = ctx.session_data
|
||||
-- kong.log.err("Session id after: ", session_id, " session_data: ", session_data and "EXISTS" or "NIL")
|
||||
if not session_id or not session_data or ctx.session_finalized then
|
||||
kong.log.err("No session data found in body_filter - session_id:", session_id, " session_data:", session_data)
|
||||
ngx.arg[1] = chunk
|
||||
if not session_id or not session_data then
|
||||
kong.log.debug("No session data found in body_filter")
|
||||
return
|
||||
end
|
||||
kong.log.err("Session id after 2")
|
||||
|
||||
-- Timeout handling
|
||||
|
||||
if not ctx.body_filter_start_time then
|
||||
ctx.body_filter_start_time = ngx.now()
|
||||
end
|
||||
|
||||
local elapsed_time = ngx.now() - ctx.body_filter_start_time
|
||||
if elapsed_time > 150 then
|
||||
kong.log.warn("Body filter timeout after ", elapsed_time, " seconds - failing open")
|
||||
ctx.cleanup_needed = true
|
||||
ctx.timeout_passthrough = true
|
||||
return
|
||||
end
|
||||
|
||||
|
||||
local chunk = ngx.arg[1]
|
||||
local eof = ngx.arg[2]
|
||||
|
||||
if chunk and #chunk > 0 then
|
||||
ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
|
||||
@@ -249,8 +199,6 @@ function NanoHandler.body_filter(conf)
|
||||
ctx.body_buffer_chunk = ctx.body_buffer_chunk + 1
|
||||
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
ctx.blocked = true
|
||||
ctx.session_finalized = true
|
||||
ctx.cleanup_needed = true
|
||||
ngx.arg[1] = ""
|
||||
ngx.arg[2] = true
|
||||
@@ -259,16 +207,10 @@ function NanoHandler.body_filter(conf)
|
||||
end
|
||||
|
||||
if eof then
|
||||
kong.log.err("End of response body reached in body_filter")
|
||||
|
||||
-- Timeout handling
|
||||
if ctx.body_seen or ctx.expect_body == false then
|
||||
kong.log.err("Finalizing session in body_filter")
|
||||
local verdict, response = nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_RESPONSE_END)
|
||||
if verdict == nano.AttachmentVerdict.DROP then
|
||||
kong.log.err("Dropping response in body_filter after end_inspection")
|
||||
ctx.blocked = true
|
||||
ctx.session_finalized = true
|
||||
kong.log.debug("Dropping response in body_filter after end_inspection")
|
||||
ctx.cleanup_needed = true
|
||||
ngx.arg[1] = ""
|
||||
ngx.arg[2] = true
|
||||
@@ -276,17 +218,14 @@ function NanoHandler.body_filter(conf)
|
||||
end
|
||||
|
||||
end
|
||||
-- Cleanup in log phase instead
|
||||
ctx.cleanup_needed = true
|
||||
ctx.session_finalized = true
|
||||
end
|
||||
end
|
||||
|
||||
function NanoHandler.log(conf)
|
||||
local ctx = kong.ctx.plugin
|
||||
kong.log.err("log phase: ctx.blocked=", ctx.blocked, " ctx.cleanup_needed=", ctx.cleanup_needed, " ctx.session_id=", ctx.session_id, " ctx.session_data=", ctx.session_data and "EXISTS" or "NIL")
|
||||
-- Cleanup session if it was blocked (kong.response.exit was called)
|
||||
if ctx.cleanup_needed or ctx.session_data then
|
||||
kong.log.debug("Entering log phase cleanup, cleanup_needed: ", tostring(ctx.cleanup_needed))
|
||||
if ctx.cleanup_needed then
|
||||
nano.fini_session(ctx.session_data)
|
||||
nano.cleanup_all()
|
||||
ctx.session_data = nil
|
||||
|
||||
Reference in New Issue
Block a user