1 files changed, 86 insertions, 0 deletions
diff --git a/user_channel/passwd_mgr.hpp b/user_channel/passwd_mgr.hpp
new file mode 100644
index 0000000..3078e21
--- /dev/null
+++ b/user_channel/passwd_mgr.hpp
@@ -0,0 +1,86 @@
+/*
+// 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>
+
+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);
+
+  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 decrypts the data provided
+     *
+     *  @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 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 decrypt(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);
+};
+
+} // namespace ipmi