security_handler.h

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/*!**********************************************************************
 *
 * @copyright Copyright (C) 2016 Siemens Aktiengesellschaft.\n
 *            All rights reserved.
 *
 *************************************************************************
 *
 * @file     security_handler.h
 * @date     Jun 27, 2016
 * @brief    Security handler module header file.
 *
 * This module presents security related operations. Used by upper layer modules. Works as an intermediate layer between upper
 * level modules and underlying implementations. For actual security operation implementations please check security.h
 *
 ************************************************************************/

#ifndef SECURITY_HANDLER_H_
#define SECURITY_HANDLER_H_

#include "string_type.h"

typedef struct rsa_t
{
    char *public_key;              
    mcl_size_t public_key_length;  
    char *private_key;             
    mcl_size_t private_key_length; 
    mcl_uint8_t *session_key;      
    mcl_size_t session_key_length; 
} rsa_t;

typedef struct security_handler_t
{
    rsa_t rsa;                           
    mcl_uint8_t *hmac_key;               
    mcl_uint8_t *onboarding_key;         
    mcl_uint8_t *authentication_key;     
    mcl_size_t authentication_key_size;  
    string_t *registration_access_token; 
    string_t *registration_client_uri;   
    string_t *client_secret;             
    string_t *access_token;              
    string_t *last_token_time;           
    string_t *client_id;                 
} security_handler_t;

E_MCL_ERROR_CODE security_handler_initialize(security_handler_t **security_handler);

E_MCL_ERROR_CODE security_handler_generate_jti(string_t **jti);

E_MCL_ERROR_CODE security_handler_hash_sha256(const mcl_uint8_t *data, mcl_size_t data_size, mcl_uint8_t **hash, mcl_size_t *hash_size);

E_MCL_ERROR_CODE security_handler_hmac_sha256(security_handler_t *security_handler, const mcl_uint8_t *data, mcl_size_t data_size, mcl_uint8_t **hash, mcl_size_t *hash_size);

E_MCL_ERROR_CODE security_handler_base64_url_encode(const mcl_uint8_t *data, mcl_size_t data_size, string_t **encoded_data);

E_MCL_ERROR_CODE security_handler_base64_encode(const mcl_uint8_t *data, mcl_size_t data_size, string_t **encoded_data);

E_MCL_ERROR_CODE security_handler_base64_decode(const string_t *encoded_data, mcl_uint8_t **decoded_data, mcl_size_t *decoded_data_size);

E_MCL_ERROR_CODE security_handler_generate_rsa_key(security_handler_t *security_handler);

E_MCL_ERROR_CODE security_handler_rsa_sign(char *rsa_key, char *data, mcl_size_t data_size, mcl_uint8_t **signature, mcl_size_t *signature_size);

void security_handler_destroy(security_handler_t **security_handler);

#endif //SECURITY_HANDLER_H_