diff options
Diffstat (limited to 'core/certmanager.lua')
| -rw-r--r-- | core/certmanager.lua | 225 |
1 files changed, 158 insertions, 67 deletions
diff --git a/core/certmanager.lua b/core/certmanager.lua index 624bd841..3872bd9a 100644 --- a/core/certmanager.lua +++ b/core/certmanager.lua @@ -1,97 +1,182 @@ -- 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 = ssl; -local ssl_newcontext = ssl and ssl.newcontext; - -local tostring = tostring; +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 = configmanager.resolve_relative_path; -local config_path = prosody.paths.config; - -local luasec_has_noticket, luasec_has_verifyext, luasec_has_no_compression; -if ssl then - local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)"); - luasec_has_noticket = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=4; - luasec_has_verifyext = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5; - luasec_has_no_compression = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5; -end - -module "certmanager" +local resolve_path = require"util.paths".resolve_relative_path; +local config_path = prosody.paths.config or "."; + +local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)"); +local luasec_version = tonumber(luasec_major) * 100 + tonumber(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 default_ssl_config = configmanager.get("*", "ssl"); -local default_capath = "/etc/ssl/certs"; -local default_verify = (ssl and ssl.x509 and { "peer", "client_once", }) or "none"; -local default_options = { "no_sslv2", "no_sslv3", "cipher_server_preference", luasec_has_noticket and "no_ticket" or nil }; -local default_verifyext = { "lsec_continue", "lsec_ignore_purpose" }; - -if ssl and not luasec_has_verifyext and ssl.x509 then - -- COMPAT mw/luasec-hg - for i=1,#default_verifyext do -- Remove lsec_ prefix - default_verify[#default_verify+1] = default_verifyext[i]:sub(6); +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 -if luasec_has_no_compression and configmanager.get("*", "ssl_compression") ~= true then - default_options[#default_options+1] = "no_compression"; + +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 -if luasec_has_no_compression then -- Has no_compression? Then it has these too... - default_options[#default_options+1] = "single_dh_use"; - default_options[#default_options+1] = "single_ecdh_use"; +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 -function create_context(host, mode, user_ssl_config) - user_ssl_config = user_ssl_config or default_ssl_config; - - if not ssl then return nil, "LuaSec (required for encryption) was not found"; end - if not user_ssl_config then return nil, "No SSL/TLS configuration present for "..host; end - - local ssl_config = { - mode = mode; - protocol = user_ssl_config.protocol or "sslv23"; - key = resolve_path(config_path, user_ssl_config.key); - password = user_ssl_config.password or function() log("error", "Encrypted certificate for %s requires 'ssl' 'password' to be set in config", host); end; - certificate = resolve_path(config_path, user_ssl_config.certificate); - capath = resolve_path(config_path, user_ssl_config.capath or default_capath); - cafile = resolve_path(config_path, user_ssl_config.cafile); - verify = user_ssl_config.verify or default_verify; - verifyext = user_ssl_config.verifyext or default_verifyext; - options = user_ssl_config.options or default_options; - depth = user_ssl_config.depth; - curve = user_ssl_config.curve or "secp384r1"; - ciphers = user_ssl_config.ciphers or "HIGH+kEDH:HIGH+kEECDH:HIGH:!PSK:!SRP:!3DES:!aNULL"; - dhparam = user_ssl_config.dhparam; +-- 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 = { -- Enabled ciphers in order of preference: + "HIGH+kEDH", -- Ephemeral Diffie-Hellman key exchange, if a 'dhparam' file is set + "HIGH+kEECDH", -- Ephemeral Elliptic curve Diffie-Hellman key exchange + "HIGH", -- Other "High strength" ciphers + -- Disabled cipher suites: + "!PSK", -- Pre-Shared Key - not used for XMPP + "!SRP", -- Secure Remote Password - not used for XMPP + "!3DES", -- 3DES - slow and of questionable security + "!aNULL", -- Ciphers that does not authenticate the connection }; +} +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(ssl_config.dhparam) == "string" then - local f, err = io_open(resolve_path(config_path, ssl_config.dhparam)); + 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(); - ssl_config.dhparam = function() return dhparam; end + user_ssl_config.dhparam = function() return dhparam; end end - local ctx, err = ssl_newcontext(ssl_config); + local ctx, err = ssl_newcontext(user_ssl_config); - -- COMPAT: LuaSec 0.4.1 ignores the cipher list from the config, so we have to take - -- care of it ourselves... - if ctx and ssl_config.ciphers then + -- 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, ssl_config.ciphers); + success, err = ssl_context.setcipher(ctx, user_ssl_config.ciphers); if not success then ctx = nil; end end @@ -100,9 +185,9 @@ function create_context(host, mode, user_ssl_config) local file = err:match("^error loading (.-) %("); if file then if file == "private key" then - file = ssl_config.key or "your private key"; + file = user_ssl_config.key or "your private key"; elseif file == "certificate" then - file = ssl_config.certificate or "your certificate file"; + file = user_ssl_config.certificate or "your certificate file"; end local reason = err:match("%((.+)%)$") or "some reason"; if reason == "Permission denied" then @@ -121,13 +206,19 @@ function create_context(host, mode, user_ssl_config) log("error", "SSL/TLS: Error initialising for %s: %s", host, err); end end - return ctx, err; + return ctx, err, user_ssl_config; end -function reload_ssl_config() - default_ssl_config = configmanager.get("*", "ssl"); +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 _M; +return { + create_context = create_context; + reload_ssl_config = reload_ssl_config; +}; |