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/*
// Copyright (c) 2018 Intel Corporation
//
// 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.
*/
#pragma once
#include <openssl/evp.h>
#include <ctime>
#include <unordered_map>
#include <vector>
namespace ipmi
{
class PasswdMgr
{
public:
~PasswdMgr() = default;
PasswdMgr(const PasswdMgr&) = delete;
PasswdMgr& operator=(const PasswdMgr&) = delete;
PasswdMgr(PasswdMgr&&) = delete;
PasswdMgr& operator=(PasswdMgr&&) = delete;
/** @brief Constructs user password list
*
*/
PasswdMgr();
/** @brief Get password for the user
*
* @param[in] userName - user name
*
* @return password string. will return empty string, if unable to locate
* the user
*/
std::string getPasswdByUserName(const std::string& userName);
/** @brief Update / clear username and password entry for the specified
* user
*
* @param[in] userName - user name that has to be renamed / deleted
* @param[in] newUserName - new user name. If empty, userName will be
* deleted.
*
* @return error response
*/
int updateUserEntry(const std::string& userName,
const std::string& newUserName);
private:
using UserName = std::string;
using Password = std::string;
std::unordered_map<UserName, Password> passwdMapList;
std::time_t fileLastUpdatedTime;
/** @brief check timestamp and reload password map if required
*
*/
void checkAndReload(void);
/** @brief initializes passwdMapList by reading the encrypted file
*
* Initializes the passwordMapList members after decrypting the
* password file. passwordMapList will be used further in IPMI
* authentication.
*/
void initPasswordMap(void);
/** @brief Function to read the encrypted password file data
*
* @param[out] outBytes - vector to hold decrypted password file data
*
* @return error response
*/
int readPasswdFileData(std::vector<uint8_t>& outBytes);
/** @brief Updates special password file by clearing the password entry
* for the user specified.
*
* @param[in] userName - user name that has to be renamed / deleted
* @param[in] newUserName - new user name. If empty, userName will be
* deleted.
*
* @return error response
*/
int updatePasswdSpecialFile(const std::string& userName,
const std::string& newUserName);
/** @brief encrypts or decrypt the data provided
*
* @param[in] doEncrypt - do encrypt if set to true, else do decrypt.
* @param[in] cipher - cipher to be used
* @param[in] key - pointer to the key
* @param[in] keyLen - Length of the key to be used
* @param[in] iv - pointer to initialization vector
* @param[in] ivLen - Length of the iv
* @param[in] inBytes - input data to be encrypted / decrypted
* @param[in] inBytesLen - input size to be encrypted / decrypted
* @param[in] mac - message authentication code - to figure out corruption
* @param[in] macLen - size of MAC
* @param[in] outBytes - ptr to store output bytes
* @param[in] outBytesLen - outbut data length.
*
* @return error response
*/
int encryptDecryptData(bool doEncrypt, const EVP_CIPHER* cipher,
uint8_t* key, size_t keyLen, uint8_t* iv,
size_t ivLen, uint8_t* inBytes, size_t inBytesLen,
uint8_t* mac, size_t* macLen, uint8_t* outBytes,
size_t* outBytesLen);
/** @brief returns updated file time of passwd file entry.
*
* @return timestamp or -1 for error.
*/
std::time_t getUpdatedFileTime();
};
} // namespace ipmi
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