mirror of https://github.com/Icinga/icinga2.git
274 lines
8.1 KiB
C++
274 lines
8.1 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "base/tlsutility.hpp"
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namespace icinga
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{
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static bool l_SSLInitialized = false;
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static boost::mutex *l_Mutexes;
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static void OpenSSLLockingCallback(int mode, int type, const char *, int)
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{
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if (mode & CRYPTO_LOCK)
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l_Mutexes[type].lock();
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else
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l_Mutexes[type].unlock();
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}
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/**
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* Initializes the OpenSSL library.
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*/
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static void InitializeOpenSSL(void)
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{
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if (l_SSLInitialized)
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return;
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SSL_library_init();
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SSL_load_error_strings();
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SSL_COMP_get_compression_methods();
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l_Mutexes = new boost::mutex[CRYPTO_num_locks()];
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CRYPTO_set_locking_callback(&OpenSSLLockingCallback);
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l_SSLInitialized = true;
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}
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/**
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* Initializes an SSL context using the specified certificates.
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*
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* @param pubkey The public key.
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* @param privkey The matching private key.
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* @param cakey CA certificate chain file.
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* @returns An SSL context.
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*/
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shared_ptr<SSL_CTX> MakeSSLContext(const String& pubkey, const String& privkey, const String& cakey)
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{
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InitializeOpenSSL();
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shared_ptr<SSL_CTX> sslContext = shared_ptr<SSL_CTX>(SSL_CTX_new(TLSv1_method()), SSL_CTX_free);
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SSL_CTX_set_mode(sslContext.get(), 0);
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if (!SSL_CTX_use_certificate_chain_file(sslContext.get(), pubkey.CStr())) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_CTX_use_certificate_chain_file")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(pubkey));
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}
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if (!SSL_CTX_use_PrivateKey_file(sslContext.get(), privkey.CStr(), SSL_FILETYPE_PEM)) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_CTX_use_PrivateKey_file")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(privkey));
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}
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if (!SSL_CTX_check_private_key(sslContext.get())) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_CTX_check_private_key")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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if (!SSL_CTX_load_verify_locations(sslContext.get(), cakey.CStr(), NULL)) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_CTX_load_verify_locations")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(cakey));
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}
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STACK_OF(X509_NAME) *cert_names;
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cert_names = SSL_load_client_CA_file(cakey.CStr());
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if (cert_names == NULL) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SSL_load_client_CA_file")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(cakey));
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}
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SSL_CTX_set_client_CA_list(sslContext.get(), cert_names);
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return sslContext;
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}
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/**
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* Loads a CRL and appends its certificates to the specified SSL context.
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*
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* @param context The SSL context.
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* @param crlPath The path to the CRL file.
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*/
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void AddCRLToSSLContext(const shared_ptr<SSL_CTX>& context, const String& crlPath)
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{
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X509_STORE *x509_store = SSL_CTX_get_cert_store(context.get());
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X509_LOOKUP *lookup;
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lookup = X509_STORE_add_lookup(x509_store, X509_LOOKUP_file());
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if (!lookup) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("X509_STORE_add_lookup")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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if (X509_LOOKUP_load_file(lookup, crlPath.CStr(), X509_FILETYPE_PEM) != 0) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("X509_LOOKUP_load_file")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(crlPath));
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}
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X509_VERIFY_PARAM *param = X509_VERIFY_PARAM_new();
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X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
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X509_STORE_set1_param(x509_store, param);
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X509_VERIFY_PARAM_free(param);
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}
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/**
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* Retrieves the common name for an X509 certificate.
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*
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* @param certificate The X509 certificate.
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* @returns The common name.
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*/
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String GetCertificateCN(const shared_ptr<X509>& certificate)
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{
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char buffer[256];
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int rc = X509_NAME_get_text_by_NID(X509_get_subject_name(certificate.get()),
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NID_commonName, buffer, sizeof(buffer));
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if (rc == -1) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("X509_NAME_get_text_by_NID")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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return buffer;
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}
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/**
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* Retrieves an X509 certificate from the specified file.
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*
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* @param pemfile The filename.
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* @returns An X509 certificate.
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*/
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shared_ptr<X509> GetX509Certificate(const String& pemfile)
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{
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X509 *cert;
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BIO *fpcert = BIO_new(BIO_s_file());
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if (fpcert == NULL) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("BIO_new")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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if (BIO_read_filename(fpcert, pemfile.CStr()) < 0) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("BIO_read_filename")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(pemfile));
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}
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cert = PEM_read_bio_X509_AUX(fpcert, NULL, NULL, NULL);
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if (cert == NULL) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("PEM_read_bio_X509_AUX")
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<< errinfo_openssl_error(ERR_get_error())
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<< boost::errinfo_file_name(pemfile));
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}
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BIO_free(fpcert);
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return shared_ptr<X509>(cert, X509_free);
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}
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int MakeX509CSR(const char *cn, const char *keyfile, const char *csrfile)
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{
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InitializeOpenSSL();
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RSA *rsa = RSA_generate_key(4096, RSA_F4, NULL, NULL);
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BIO *bio = BIO_new(BIO_s_file());
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BIO_write_filename(bio, const_cast<char *>(keyfile));
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PEM_write_bio_RSAPrivateKey(bio, rsa, NULL, NULL, 0, NULL, NULL);
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BIO_free(bio);
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X509_REQ *req = X509_REQ_new();
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if (!req)
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return 0;
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EVP_PKEY *key = EVP_PKEY_new();
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EVP_PKEY_assign_RSA(key, rsa);
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X509_REQ_set_version(req, 0);
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X509_REQ_set_pubkey(req, key);
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X509_NAME *name = X509_REQ_get_subject_name(req);
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X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, (unsigned char *)cn, -1, -1, 0);
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X509_REQ_sign(req, key, EVP_sha1());
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EVP_PKEY_free(key);
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bio = BIO_new(BIO_s_file());
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BIO_write_filename(bio, const_cast<char *>(csrfile));
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PEM_write_bio_X509_REQ(bio, req);
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BIO_free(bio);
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X509_REQ_free(req);
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return 1;
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}
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String SHA256(const String& s)
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{
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SHA256_CTX context;
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unsigned char digest[SHA256_DIGEST_LENGTH];
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if (!SHA256_Init(&context)) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SHA256_Init")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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if (!SHA256_Update(&context, (unsigned char*)s.CStr(), s.GetLength())) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SHA256_Update")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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if (!SHA256_Final(digest, &context)) {
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BOOST_THROW_EXCEPTION(openssl_error()
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<< boost::errinfo_api_function("SHA256_Final")
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<< errinfo_openssl_error(ERR_get_error()));
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}
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int i;
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char output[SHA256_DIGEST_LENGTH*2+1];
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for (i = 0; i < 32; i++)
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sprintf(output + 2 * i, "%02x", digest[i]);
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return output;
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}
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}
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