| -- |
| -- Licensed to the Apache Software Foundation (ASF) under one or more |
| -- contributor license agreements. See the NOTICE file distributed with |
| -- this work for additional information regarding copyright ownership. |
| -- The ASF licenses this file to You under the Apache License, Version 2.0 |
| -- (the "License"); you may not use this file except in compliance with |
| -- the License. You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| local core = require("apisix.core") |
| local ngx_ssl = require("ngx.ssl") |
| local ngx_encode_base64 = ngx.encode_base64 |
| local ngx_decode_base64 = ngx.decode_base64 |
| local aes = require("resty.aes") |
| local str_lower = string.lower |
| local assert = assert |
| local type = type |
| |
| |
| local cert_cache = core.lrucache.new { |
| ttl = 3600, count = 1024, |
| } |
| |
| local pkey_cache = core.lrucache.new { |
| ttl = 3600, count = 1024, |
| } |
| |
| |
| local _M = {} |
| |
| |
| function _M.server_name() |
| local sni, err = ngx_ssl.server_name() |
| if err then |
| return nil, err |
| end |
| |
| if not sni then |
| local local_conf = core.config.local_conf() |
| sni = core.table.try_read_attr(local_conf, "apisix", "ssl", "fallback_sni") |
| if not sni then |
| return nil |
| end |
| end |
| |
| sni = str_lower(sni) |
| return sni |
| end |
| |
| |
| local _aes_128_cbc_with_iv = false |
| local function get_aes_128_cbc_with_iv() |
| if _aes_128_cbc_with_iv == false then |
| local local_conf = core.config.local_conf() |
| local iv = core.table.try_read_attr(local_conf, "apisix", "ssl", "key_encrypt_salt") |
| if type(iv) =="string" and #iv == 16 then |
| _aes_128_cbc_with_iv = assert(aes:new(iv, nil, aes.cipher(128, "cbc"), {iv = iv})) |
| else |
| _aes_128_cbc_with_iv = nil |
| end |
| end |
| return _aes_128_cbc_with_iv |
| end |
| |
| |
| function _M.aes_encrypt_pkey(origin) |
| local aes_128_cbc_with_iv = get_aes_128_cbc_with_iv() |
| if aes_128_cbc_with_iv ~= nil and core.string.has_prefix(origin, "---") then |
| local encrypted = aes_128_cbc_with_iv:encrypt(origin) |
| if encrypted == nil then |
| core.log.error("failed to encrypt key[", origin, "] ") |
| return origin |
| end |
| |
| return ngx_encode_base64(encrypted) |
| end |
| |
| return origin |
| end |
| |
| |
| local function decrypt_priv_pkey(iv, key) |
| local decoded_key = ngx_decode_base64(key) |
| if not decoded_key then |
| core.log.error("base64 decode ssl key failed. key[", key, "] ") |
| return nil |
| end |
| |
| local decrypted = iv:decrypt(decoded_key) |
| if not decrypted then |
| core.log.error("decrypt ssl key failed. key[", key, "] ") |
| end |
| |
| return decrypted |
| end |
| |
| |
| local function aes_decrypt_pkey(origin) |
| if core.string.has_prefix(origin, "---") then |
| return origin |
| end |
| |
| local aes_128_cbc_with_iv = get_aes_128_cbc_with_iv() |
| if aes_128_cbc_with_iv ~= nil then |
| return decrypt_priv_pkey(aes_128_cbc_with_iv, origin) |
| end |
| return origin |
| end |
| |
| |
| local function validate(cert, key) |
| local parsed_cert, err = ngx_ssl.parse_pem_cert(cert) |
| if not parsed_cert then |
| return nil, "failed to parse cert: " .. err |
| end |
| |
| if key == nil then |
| -- sometimes we only need to validate the cert |
| return true |
| end |
| |
| key = aes_decrypt_pkey(key) |
| if not key then |
| return nil, "failed to decrypt previous encrypted key" |
| end |
| |
| local parsed_key, err = ngx_ssl.parse_pem_priv_key(key) |
| if not parsed_key then |
| return nil, "failed to parse key: " .. err |
| end |
| |
| -- TODO: check if key & cert match |
| return true |
| end |
| _M.validate = validate |
| |
| |
| local function parse_pem_cert(sni, cert) |
| core.log.debug("parsing cert for sni: ", sni) |
| |
| local parsed, err = ngx_ssl.parse_pem_cert(cert) |
| return parsed, err |
| end |
| |
| |
| function _M.fetch_cert(sni, cert) |
| local parsed_cert, err = cert_cache(cert, nil, parse_pem_cert, sni, cert) |
| if not parsed_cert then |
| return false, err |
| end |
| |
| return parsed_cert |
| end |
| |
| |
| local function parse_pem_priv_key(sni, pkey) |
| core.log.debug("parsing priv key for sni: ", sni) |
| |
| local parsed, err = ngx_ssl.parse_pem_priv_key(aes_decrypt_pkey(pkey)) |
| return parsed, err |
| end |
| |
| |
| function _M.fetch_pkey(sni, pkey) |
| local parsed_pkey, err = pkey_cache(pkey, nil, parse_pem_priv_key, sni, pkey) |
| if not parsed_pkey then |
| return false, err |
| end |
| |
| return parsed_pkey |
| end |
| |
| |
| local function support_client_verification() |
| return ngx_ssl.verify_client ~= nil |
| end |
| _M.support_client_verification = support_client_verification |
| |
| |
| function _M.check_ssl_conf(in_dp, conf) |
| if not in_dp then |
| local ok, err = core.schema.check(core.schema.ssl, conf) |
| if not ok then |
| return nil, "invalid configuration: " .. err |
| end |
| end |
| |
| local ok, err = validate(conf.cert, conf.key) |
| if not ok then |
| return nil, err |
| end |
| |
| local numcerts = conf.certs and #conf.certs or 0 |
| local numkeys = conf.keys and #conf.keys or 0 |
| if numcerts ~= numkeys then |
| return nil, "mismatched number of certs and keys" |
| end |
| |
| for i = 1, numcerts do |
| local ok, err = validate(conf.certs[i], conf.keys[i]) |
| if not ok then |
| return nil, "failed to handle cert-key pair[" .. i .. "]: " .. err |
| end |
| end |
| |
| if conf.client then |
| if not support_client_verification() then |
| return nil, "client tls verify unsupported" |
| end |
| |
| local ok, err = validate(conf.client.ca, nil) |
| if not ok then |
| return nil, "failed to validate client_cert: " .. err |
| end |
| end |
| |
| return true |
| end |
| |
| |
| return _M |