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Load http default accounts fingerprints only once

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This commit is contained in:
dmiller
2018-03-06 04:04:54 +00:00
parent 23218ad6bf
commit a87f36109d
1 changed files with 23 additions and 6 deletions
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29
scripts/http-default-accounts.nse
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@@ -169,6 +169,13 @@ local function validate_fingerprints(fingerprints)
end
end
-- simplify unlocking the mutex, ensuring we don't try to parse again, and returning an error.
local function bad_prints(mutex, err)
nmap.registry.http_default_accounts_fingerprints = err
mutex "done"
return false, err
end
---
-- load_fingerprints(filename, category)
-- Loads data from file and returns table of fingerprints if sanity checks are passed
@@ -181,9 +188,16 @@ local function load_fingerprints(filename, cat)
local file, filename_full, fingerprints
-- Check if fingerprints are cached
if(nmap.registry.http_default_accounts_fingerprints ~= nil) then
stdnse.debug(1, "Loading cached fingerprints")
return nmap.registry.http_default_accounts_fingerprints
local mutex = nmap.mutex("http_default_accounts_fingerprints")
mutex "lock"
if nmap.registry.http_default_accounts_fingerprints then
if type(nmap.registry.http_fingerprints) == "table" then
stdnse.debug(1, "Loading cached fingerprints")
mutex "done"
return true, nmap.registry.http_default_accounts_fingerprints
else
return bad_prints(mutex, nmap.registry.http_default_accounts_fingerprints)
end
end
-- Try and find the file
@@ -199,7 +213,7 @@ local function load_fingerprints(filename, cat)
file = loadfile(filename_full, "t", env)
if( not(file) ) then
stdnse.debug(1, "Couldn't load the file: %s", filename_full)
return false, "Couldn't load fingerprint file: " .. filename_full
return bad_prints(mutex, "Couldn't load fingerprint file: " .. filename_full)
end
file()
fingerprints = env.fingerprints
@@ -207,7 +221,7 @@ local function load_fingerprints(filename, cat)
-- Validate fingerprints
local valid_flag = validate_fingerprints(fingerprints)
if type(valid_flag) == "string" then
return false, valid_flag
return bad_prints(mutex, valid_flag)
end
-- Category filter
@@ -223,9 +237,12 @@ local function load_fingerprints(filename, cat)
-- Check there are fingerprints to use
if(#fingerprints == 0 ) then
return false, "No fingerprints were loaded after processing ".. filename
return bad_prints(mutex, "No fingerprints were loaded after processing ".. filename)
end
-- Cache the fingerprints for other scripts, so we aren't reading the files every time
nmap.registry.http_default_accounts_fingerprints = fingerprints
mutex "done"
return true, fingerprints
end