src/core/crypto/aes_ecb.hpp

/*
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 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 */

/**
 * @file
 *   This file includes definitions for performing AES-ECB computations.
 */

#ifndef AES_ECB_HPP_
#define AES_ECB_HPP_

#include <mbedtls/aes.h>

namespace ot {
namespace Crypto {

/**
 * @addtogroup core-security
 *
 * @{
 *
 */

/**
 * This class implements AES ECB computation.
 *
 */
class AesEcb
{
public:
    enum
    {
        kBlockSize = 16,  ///< AES-128 block size (bytes).
    };

    /**
     * Constructor to initialize the mbedtls_aes_context.
     *
     */
    AesEcb();

    /**
     * Destructor to free the mbedtls_aes_context.
     *
     */
    ~AesEcb();

    /**
     * This method sets the key.
     *
     * @param[in]  aKey        A pointer to the key.
     * @param[in]  aKeyLength  The key length in bytes.
     *
     */
    void SetKey(const uint8_t *aKey, uint16_t aKeyLength);

    /**
     * This method encrypts data.
     *
     * @param[in]   aInput   A pointer to the input buffer.
     * @param[out]  aOutput  A pointer to the output buffer.
     *
     */
    void Encrypt(const uint8_t aInput[kBlockSize], uint8_t aOutput[kBlockSize]);

private:
    mbedtls_aes_context mContext;
};

/**
 * @}
 *
 */

}  // namespace Crypto
}  // namespace ot

#endif  // AES_ECB_HPP_