filters: migrate from luacrypto to luaossl

[ps-cgit] / filters / gentoo-ldap-authentication.lua

diff --git a/filters/gentoo-ldap-authentication.lua b/filters/gentoo-ldap-authentication.lua
index b4d98c29285e20c0c605ee8a532bc46acfa90ddf..673c88d1021cd19074a748fc2763bc5a3bd79480 100644 (file)
--- a/filters/gentoo-ldap-authentication.lua
+++ b/filters/gentoo-ldap-authentication.lua
@@ -1,8 +1,8 @@
 -- This script may be used with the auth-filter. Be sure to configure it as you wish.
 --
 -- Requirements:
---     luacrypto >= 0.3
---     <http://mkottman.github.io/luacrypto/>
+--     luaossl
+--     <http://25thandclement.com/~william/projects/luaossl.html>
 --     lualdap >= 1.2
 --     <https://git.zx2c4.com/lualdap/about/>
 --     luaposix
@@ -10,9 +10,9 @@
 --
 local sysstat = require("posix.sys.stat")
 local unistd = require("posix.unistd")
-local crypto = require("crypto")
 local lualdap = require("lualdap")
-
+local rand = require("openssl.rand")
+local hmac = require("openssl.hmac")
 
 --
 --
@@ -226,6 +226,13 @@ function get_cookie(cookies, name)
        return string.match(cookies, ";" .. name .. "=(.-);")
 end
 
+function tohex(b)
+       local x = ""
+       for i = 1, #b do
+               x = x .. string.format("%.2x", string.byte(b, i))
+       end
+       return x
+end
 
 --
 --
@@ -243,12 +250,12 @@ function get_secret()
        local secret_file = io.open(secret_filename, "r")
        if secret_file == nil then
                local old_umask = sysstat.umask(63)
-               local temporary_filename = secret_filename .. ".tmp." .. crypto.hex(crypto.rand.bytes(16))
+               local temporary_filename = secret_filename .. ".tmp." .. tohex(rand.bytes(16))
                local temporary_file = io.open(temporary_filename, "w")
                if temporary_file == nil then
                        os.exit(177)
                end
-               temporary_file:write(crypto.hex(crypto.rand.bytes(32)))
+               temporary_file:write(tohex(rand.bytes(32)))
                temporary_file:close()
                unistd.link(temporary_filename, secret_filename) -- Intentionally fails in the case that another process is doing the same.
                unistd.unlink(temporary_filename)
@@ -273,7 +280,7 @@ function validate_value(expected_field, cookie)
        local field = ""
        local expiration = 0
        local salt = ""
-       local hmac = ""
+       local chmac = ""
 
        if cookie == nil or cookie:len() < 3 or cookie:sub(1, 1) == "|" then
                return nil
@@ -292,19 +299,19 @@ function validate_value(expected_field, cookie)
                elseif i == 3 then
                        salt = component
                elseif i == 4 then
-                       hmac = component
+                       chmac = component
                else
                        break
                end
                i = i + 1
        end
 
-       if hmac == nil or hmac:len() == 0 then
+       if chmac == nil or chmac:len() == 0 then
                return nil
        end
 
        -- Lua hashes strings, so these comparisons are time invariant.
-       if hmac ~= crypto.hmac.digest("sha256", field .. "|" .. value .. "|" .. tostring(expiration) .. "|" .. salt, get_secret()) then
+       if chmac ~= tohex(hmac.new(get_secret(), "sha256"):final(field .. "|" .. value .. "|" .. tostring(expiration) .. "|" .. salt)) then
                return nil
        end
 
@@ -325,11 +332,11 @@ function secure_value(field, value, expiration)
        end
 
        local authstr = ""
-       local salt = crypto.hex(crypto.rand.bytes(16))
+       local salt = tohex(rand.bytes(16))
        value = url_encode(value)
        field = url_encode(field)
        authstr = field .. "|" .. value .. "|" .. tostring(expiration) .. "|" .. salt
-       authstr = authstr .. "|" .. crypto.hmac.digest("sha256", authstr, get_secret())
+       authstr = authstr .. "|" .. tohex(hmac.new(get_secret(), "sha256"):final(authstr))
        return authstr
 end