SecurityKey.cpp

Go to the documentation of this file.

/*
 * SecurityKey.cpp
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed 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.
 *
 */

#include "ibrdtn/security/SecurityKey.h"
#include <ibrcommon/Logger.h>
#include <fstream>
#include <sstream>

#include <openssl/pem.h>
#include <openssl/err.h>

namespace dtn
{
        namespace security
        {
                SecurityKey::SecurityKey()
                 : type(KEY_UNSPEC)
                {}

                SecurityKey::~SecurityKey()
                {}

                void SecurityKey::free(RSA* key)
                {
                        RSA_free(key);
                }

                void SecurityKey::free(EVP_PKEY* key)
                {
                        EVP_PKEY_free(key);
                }

                const std::string SecurityKey::getData() const
                {
                        std::ifstream stream(file.getPath().c_str(), ios::in);
                        std::stringstream ss;

                        ss << stream.rdbuf();

                        stream.close();

                        return ss.str();
                }

                RSA* SecurityKey::getRSA() const
                {
                        switch (type)
                        {
                        case KEY_PRIVATE:
                                return getPrivateRSA();
                        case KEY_PUBLIC:
                                return getPublicRSA();
                        default:
                                return NULL;
                        }
                }

                EVP_PKEY* SecurityKey::getEVP() const
                {
                        EVP_PKEY* ret = EVP_PKEY_new();
                        FILE * pkey_file = fopen(file.getPath().c_str(), "r");

                        switch (type)
                        {
                                case KEY_PRIVATE:
                                {
                                        ret = PEM_read_PrivateKey(pkey_file, &ret, NULL, NULL);
                                        break;
                                }

                                case KEY_PUBLIC:
                                {
                                        ret = PEM_read_PUBKEY(pkey_file, &ret, NULL, NULL);
                                        break;
                                }

                                default:
                                        ret = NULL;
                                        break;
                        }

                        fclose(pkey_file);
                        return ret;
                }

                RSA* SecurityKey::getPrivateRSA() const
                {
                        RSA *rsa = RSA_new();

                        FILE * rsa_pkey_file = fopen(file.getPath().c_str(), "r");
                        if (!rsa_pkey_file) {
                                IBRCOMMON_LOGGER_ex(critical) << "Failed to open " << file.getPath() << IBRCOMMON_LOGGER_ENDL;
                                throw ibrcommon::Exception("Failed to open " + file.getPath());
                        }
                        if (!PEM_read_RSAPrivateKey(rsa_pkey_file, &rsa, NULL, NULL)) {
                                IBRCOMMON_LOGGER_ex(critical) << "Error loading RSA private key file: " << file.getPath() << IBRCOMMON_LOGGER_ENDL;
                                ERR_print_errors_fp(stderr);
                                throw ibrcommon::Exception("Error loading RSA private key file: " + file.getPath());
                        }
                        fclose(rsa_pkey_file);
                        return rsa;
                }

                RSA* SecurityKey::getPublicRSA() const
                {
                        RSA *rsa = RSA_new();

                        FILE * rsa_pkey_file = fopen(file.getPath().c_str(), "r");
                        if (!rsa_pkey_file) {
                                IBRCOMMON_LOGGER_ex(critical) << "Failed to open " << file.getPath() << IBRCOMMON_LOGGER_ENDL;
                                throw ibrcommon::Exception("Failed to open " + file.getPath());
                        }
                        if (!PEM_read_RSA_PUBKEY(rsa_pkey_file, &rsa, NULL, NULL)) {
                                IBRCOMMON_LOGGER_ex(critical) << "Error loading RSA public key file: " << file.getPath() << IBRCOMMON_LOGGER_ENDL;
                                ERR_print_errors_fp(stderr);
                                throw ibrcommon::Exception("Error loading RSA public key file: " + file.getPath());
                        }
                        fclose(rsa_pkey_file);
                        return rsa;
                }
        }
}