/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#ifndef OXS_KEY_H
#define OXS_KEY_H


/**
  * @file oxs_key.h
  * @brief represents a Key in OMXMLSecurity 
  */

/**
* @defgroup oxs_key Key
* @ingroup oxs
* @{
*/
#include <axis2_defines.h>
#include <oxs_constants.h>
#include <oxs_buffer.h>
#include <axutil_env.h>
#include <rp_algorithmsuite.h>

#ifdef __cplusplus
extern "C"
{
#endif

    /*Key usage is not specified yet*/
#define OXS_KEY_USAGE_NONE              0
    /*Key is a session key */
#define OXS_KEY_USAGE_SESSION           1
    /*Key is a signature session key*/
#define OXS_KEY_USAGE_SIGNATURE_SESSION 2
    /*Key is a derived key */
#define OXS_KEY_USAGE_DERIVED           3 

#define OXS_KEY_DEFAULT_SIZE            64

    /** Type name for struct  oxs_key */
    typedef struct oxs_key_t oxs_key_t;

    /**
    * Gets data of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return data 
    */

    AXIS2_EXTERN unsigned char *AXIS2_CALL
    oxs_key_get_data(
        const oxs_key_t *key,
        const axutil_env_t *env);
    /**
    * Gets the name of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return name of the key
    */
    AXIS2_EXTERN axis2_char_t *AXIS2_CALL
    oxs_key_get_name(
        const oxs_key_t *key,
        const axutil_env_t *env);
    /**
    * Gets the nonce of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return nonce of the key
    */
    AXIS2_EXTERN axis2_char_t *AXIS2_CALL
    oxs_key_get_nonce(
        const oxs_key_t *key,
        const axutil_env_t *env);

    /**
    * Gets the label of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return label of the key
    */
    AXIS2_EXTERN axis2_char_t *AXIS2_CALL
    oxs_key_get_label(
        const oxs_key_t *key,
        const axutil_env_t *env);

    /**
    * Gets the size of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return size of the key
    */
    AXIS2_EXTERN int AXIS2_CALL
    oxs_key_get_size(
        const oxs_key_t *key,
        const axutil_env_t *env);
    /**
    * Gets the usage of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return usage of the key
    */
    AXIS2_EXTERN int AXIS2_CALL
    oxs_key_get_usage(
        const oxs_key_t *key,
        const axutil_env_t *env);

    /**
    * Gets the offset of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return offset of the key
    */
    AXIS2_EXTERN int AXIS2_CALL
    oxs_key_get_offset(
        const oxs_key_t *key,
        const axutil_env_t *env);

    /**
    * Gets the length of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return length of the key
    */
    AXIS2_EXTERN int AXIS2_CALL
    oxs_key_get_length(
        const oxs_key_t *key,
        const axutil_env_t *env);

    /**
    * Sets the name of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @param name name of the key
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_name(
        oxs_key_t *key,
        const axutil_env_t *env,
        axis2_char_t *name);


    /**
    * Set the usage of the key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @param usage usage of the key
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_usage(
        oxs_key_t *key,
        const axutil_env_t *env,
        int usage);

    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_nonce(
        oxs_key_t *key,
        const axutil_env_t *env,
        axis2_char_t *nonce); 

    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_label(
        oxs_key_t *key,
        const axutil_env_t *env,
        axis2_char_t *label); 

    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_offset(
        oxs_key_t *key,
        const axutil_env_t *env,
        int offset);

    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_length(
        oxs_key_t *key,
        const axutil_env_t *env,
        int length);
    /**
    * Free function for key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_free(
        oxs_key_t *key,
        const axutil_env_t *env
    );

    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_populate_with_buf(oxs_key_t *key,
                              const axutil_env_t *env,
                              oxs_buffer_t *buffer,
                              axis2_char_t *name,
                              int usage);

    /**
    * Populate a key.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @param data data of the key
    * @param name name of the key
    * @param size size of the key
    * @param usage usage of the key
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_populate(
        oxs_key_t *key,
        const axutil_env_t *env,
        unsigned char *data,
        axis2_char_t *name,
        int size,
        int usage);

    /**
    * Read a key from a file.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_read_from_file(
        oxs_key_t *key,
        const axutil_env_t *env,
        axis2_char_t *file_name);

    /**
    * Fill the key for the given algo.
    * @param key oxs_key ptr to key
    * @param env pointer to environment struct
    * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
    */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_for_algo(oxs_key_t *key,
                     const axutil_env_t *env,
                     rp_algorithmsuite_t *key_algo);


    AXIS2_EXTERN oxs_buffer_t *AXIS2_CALL
    oxs_key_get_buffer(const oxs_key_t *key,
                       const axutil_env_t *env);

    AXIS2_EXTERN oxs_key_t *AXIS2_CALL
    oxs_key_dup(oxs_key_t *key,
                const axutil_env_t *env);

    AXIS2_EXTERN oxs_key_t *AXIS2_CALL
    oxs_key_create(const axutil_env_t *env);

    /* once the key_sha is given, ownership is assumed */
    AXIS2_EXTERN axis2_status_t AXIS2_CALL
    oxs_key_set_key_sha(
        oxs_key_t *key,
        const axutil_env_t *env,
        axis2_char_t *key_sha);
    
    AXIS2_EXTERN axis2_char_t *AXIS2_CALL
    oxs_key_get_key_sha(
        const oxs_key_t *key,
        const axutil_env_t *env);


#ifdef __cplusplus
}
#endif

#endif                          /* OXS_KEY_H */