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core/certmanager.lua @ 7263:015a711a8ccf
Merge 0.10->trunk
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 10 Mar 2016 17:55:40 +0000 |
parent | 7160:5c1ee8c06235 |
child | 7319:afa83f3ccaad |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local softreq = require"util.dependencies".softreq; local ssl = softreq"ssl"; if not ssl then return { create_context = function () return nil, "LuaSec (required for encryption) was not found"; end; reload_ssl_config = function () end; } end local configmanager = require "core.configmanager"; local log = require "util.logger".init("certmanager"); local ssl_context = ssl.context or softreq"ssl.context"; local ssl_x509 = ssl.x509 or softreq"ssl.x509"; local ssl_newcontext = ssl.newcontext; local new_config = require"util.sslconfig".new; local stat = require "lfs".attributes; local tonumber, tostring = tonumber, tostring; local pairs = pairs; local type = type; local io_open = io.open; local select = select; local prosody = prosody; local resolve_path = require"util.paths".resolve_relative_path; local config_path = prosody.paths.config; local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)"); local luasec_version = luasec_major * 100 + luasec_minor; local luasec_has = { -- TODO If LuaSec ever starts exposing these things itself, use that instead cipher_server_preference = luasec_version >= 2; no_ticket = luasec_version >= 4; no_compression = luasec_version >= 5; single_dh_use = luasec_version >= 2; single_ecdh_use = luasec_version >= 2; }; local _ENV = nil; -- Global SSL options if not overridden per-host local global_ssl_config = configmanager.get("*", "ssl"); local global_certificates = configmanager.get("*", "certificates") or "certs"; local crt_try = { "", "/%s.crt", "/%s/fullchain.pem", "/%s.pem", }; local key_try = { "", "/%s.key", "/%s/privkey.pem", "/%s.pem", }; local function find_cert(user_certs, name) local certs = resolve_path(config_path, user_certs or global_certificates); for i = 1, #crt_try do local crt_path = certs .. crt_try[i]:format(name); local key_path = certs .. key_try[i]:format(name); if stat(crt_path, "mode") == "file" then if key_path:sub(-4) == ".crt" then key_path = key_path:sub(1, -4) .. "key"; if stat(key_path, "mode") == "file" then return { certificate = crt_path, key = key_path }; end elseif stat(key_path, "mode") == "file" then return { certificate = crt_path, key = key_path }; end end end end local function find_host_cert(host) if not host then return nil; end return find_cert(configmanager.get(host, "certificate"), host) or find_host_cert(host:match("%.(.+)$")); end local function find_service_cert(service, port) local cert_config = configmanager.get("*", service.."_certificate"); if type(cert_config) == "table" then cert_config = cert_config[port] or cert_config.default; end return find_cert(cert_config, service); end -- Built-in defaults local core_defaults = { capath = "/etc/ssl/certs"; depth = 9; protocol = "tlsv1+"; verify = (ssl_x509 and { "peer", "client_once", }) or "none"; options = { cipher_server_preference = luasec_has.cipher_server_preference; no_ticket = luasec_has.no_ticket; no_compression = luasec_has.no_compression and configmanager.get("*", "ssl_compression") ~= true; single_dh_use = luasec_has.single_dh_use; single_ecdh_use = luasec_has.single_ecdh_use; }; verifyext = { "lsec_continue", "lsec_ignore_purpose" }; curve = "secp384r1"; ciphers = "HIGH+kEDH:HIGH+kEECDH:HIGH:!PSK:!SRP:!3DES:!aNULL"; } local path_options = { -- These we pass through resolve_path() key = true, certificate = true, cafile = true, capath = true, dhparam = true } if luasec_version < 5 and ssl_x509 then -- COMPAT mw/luasec-hg for i=1,#core_defaults.verifyext do -- Remove lsec_ prefix core_defaults.verify[#core_defaults.verify+1] = core_defaults.verifyext[i]:sub(6); end end local function create_context(host, mode, ...) local cfg = new_config(); cfg:apply(core_defaults); local service_name, port = host:match("^(%w+) port (%d+)$"); if service_name then cfg:apply(find_service_cert(service_name, tonumber(port))); else cfg:apply(find_host_cert(host)); end cfg:apply({ mode = mode, -- We can't read the password interactively when daemonized password = function() log("error", "Encrypted certificate for %s requires 'ssl' 'password' to be set in config", host); end; }); cfg:apply(global_ssl_config); for i = select('#', ...), 1, -1 do cfg:apply(select(i, ...)); end local user_ssl_config = cfg:final(); if mode == "server" then if not user_ssl_config.key then return nil, "No key present in SSL/TLS configuration for "..host; end if not user_ssl_config.certificate then return nil, "No certificate present in SSL/TLS configuration for "..host; end end for option in pairs(path_options) do if type(user_ssl_config[option]) == "string" then user_ssl_config[option] = resolve_path(config_path, user_ssl_config[option]); else user_ssl_config[option] = nil; end end -- LuaSec expects dhparam to be a callback that takes two arguments. -- We ignore those because it is mostly used for having a separate -- set of params for EXPORT ciphers, which we don't have by default. if type(user_ssl_config.dhparam) == "string" then local f, err = io_open(user_ssl_config.dhparam); if not f then return nil, "Could not open DH parameters: "..err end local dhparam = f:read("*a"); f:close(); user_ssl_config.dhparam = function() return dhparam; end end local ctx, err = ssl_newcontext(user_ssl_config); -- COMPAT Older LuaSec ignores the cipher list from the config, so we have to take care -- of it ourselves (W/A for #x) if ctx and user_ssl_config.ciphers then local success; success, err = ssl_context.setcipher(ctx, user_ssl_config.ciphers); if not success then ctx = nil; end end if not ctx then err = err or "invalid ssl config" local file = err:match("^error loading (.-) %("); if file then if file == "private key" then file = user_ssl_config.key or "your private key"; elseif file == "certificate" then file = user_ssl_config.certificate or "your certificate file"; end local reason = err:match("%((.+)%)$") or "some reason"; if reason == "Permission denied" then reason = "Check that the permissions allow Prosody to read this file."; elseif reason == "No such file or directory" then reason = "Check that the path is correct, and the file exists."; elseif reason == "system lib" then reason = "Previous error (see logs), or other system error."; elseif reason == "(null)" or not reason then reason = "Check that the file exists and the permissions are correct"; else reason = "Reason: "..tostring(reason):lower(); end log("error", "SSL/TLS: Failed to load '%s': %s (for %s)", file, reason, host); else log("error", "SSL/TLS: Error initialising for %s: %s", host, err); end end return ctx, err, user_ssl_config; end local function reload_ssl_config() global_ssl_config = configmanager.get("*", "ssl"); if luasec_has.no_compression then core_defaults.options.no_compression = configmanager.get("*", "ssl_compression") ~= true; end end prosody.events.add_handler("config-reloaded", reload_ssl_config); return { create_context = create_context; reload_ssl_config = reload_ssl_config; };