Mercurial > prosody-modules
view mod_auth_token/token_auth_utils.lib.lua @ 5406:b86d80e21c60
mod_http_oauth2: Validate consistency of response and grant types
Ensure that these correlated fields make sense per RFC 7591 ยง 2.1, even
though we currently only check the response type during authorization.
This could probably all be deleted if (when!) we remove the implicit
grant, since then these things don't make any sense anymore.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Tue, 02 May 2023 16:34:31 +0200 |
parents | 0fb12a4b6106 |
children |
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local base64 = require "util.encodings".base64; local hmac = require "openssl.hmac"; local luatz = require "luatz"; local otp = require "otp"; local DIGEST_TYPE = "SHA256"; local OTP_DEVIATION = 1; local OTP_DIGITS = 8; local OTP_INTERVAL = 30; local nonce_cache = {}; local function check_nonce(jid, otp_value, nonce) -- We cache all nonces used per OTP, to ensure that a token cannot be used -- more than once. -- -- We assume that the OTP is valid in the current time window. This is the -- case because we only call check_nonce *after* the OTP has been verified. -- -- We only store one OTP per JID, so if a new OTP comes in, we wipe the -- previous OTP and its cached nonces. if nonce_cache[jid] == nil or nonce_cache[jid][otp_value] == nil then nonce_cache[jid] = {} nonce_cache[jid][otp_value] = {} nonce_cache[jid][otp_value][nonce] = true return true; end if nonce_cache[jid][otp_value][nonce] == true then return false; else nonce_cache[jid][otp_value][nonce] = true; return true; end end local function verify_token(username, password, otp_seed, token_secret, log) local totp = otp.new_totp_from_key(otp_seed, OTP_DIGITS, OTP_INTERVAL) local token = string.match(password, "(%d+) ") local otp_value = token:sub(1,8) local nonce = token:sub(9) local signature = base64.decode(string.match(password, " (.+)")) local jid = username.."@"..module.host if totp:verify(otp_value, OTP_DEVIATION, luatz.time()) then log("debug", "The TOTP was verified"); local hmac_ctx = hmac.new(token_secret, DIGEST_TYPE) if signature == hmac_ctx:final(otp_value..nonce..jid) then log("debug", "The key was verified"); if check_nonce(jid, otp_value, nonce) then log("debug", "The nonce was verified"); return true; end end end log("debug", "Verification failed"); return false; end return { OTP_DEVIATION = OTP_DIGITS, OTP_DIGITS = OTP_DIGITS, OTP_INTERVAL = OTP_INTERVAL, DIGEST_TYPE = DIGEST_TYPE, verify_token = verify_token; }