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mod_aws_profile/mod_aws_profile.lua @ 5243:d5dc8edb2695
mod_http_oauth2: Use more compact IDs
UUIDs are nice but so verbose!
The reduction in entropy for the nonce should be fine since the
timestamp is also counts towards this, and it changes every second
(modulo clock shenanigans), so the chances of someone managing to get
the same client_secret by registering with the same information at the
same time as another entity should be negligible.
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 11 Mar 2023 22:46:27 +0100 |
parent | 3698:1d719d4ef18f |
child | 5725:616c0459aca7 |
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local http = require "net.http"; local json = require "util.json"; local parse_timestamp = require "util.datetime".parse; module:set_global(); local current_credentials = module:shared("/*/aws_profile/credentials"); local function get_role_credentials(role_name, cb) http.request("http://169.254.169.254/latest/meta-data/iam/security-credentials/"..role_name, nil, function (credentials_json) local credentials = credentials_json and json.decode(credentials_json); if not credentials or not (credentials.AccessKeyId and credentials.SecretAccessKey) then module:log("warn", "Failed to fetch credentials for %q", role_name); cb(nil); return; end local expiry = parse_timestamp(credentials.Expiration); local ttl = os.difftime(expiry, os.time()); cb({ access_key = credentials.AccessKeyId; secret_key = credentials.SecretAccessKey; ttl = ttl; expiry = expiry; }); end); end local function get_credentials(cb) http.request("http://169.254.169.254/latest/meta-data/iam/security-credentials", nil, function (role_name) role_name = role_name and role_name:match("%S+"); if not role_name then module:log("warn", "Unable to discover role name"); cb(nil); return; end get_role_credentials(role_name, cb); end); end function refresh_credentials(force) if not force and current_credentials.expiry and current_credentials.expiry - os.time() > 300 then return; end get_credentials(function (credentials) if not credentials then module:log("warn", "Failed to refresh credentials!"); return; end current_credentials.access_key = credentials.access_key; current_credentials.secret_key = credentials.secret_key; current_credentials.expiry = credentials.expiry; module:timer(credentials.ttl or 240, refresh_credentials); module:fire_event("aws_profile/credentials-refreshed", current_credentials); end); end function module.load() refresh_credentials(true); end