CryptoKey.h

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/*
 * Copyright (c) 2017-2019, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 */
#ifndef ti_drivers_cryptoutils_cyptokey_CryptoKey__include
#define ti_drivers_cryptoutils_cyptokey_CryptoKey__include

#include <stdint.h>
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

#define CryptoKey_STATUS_RESERVED        (-32)

#define CryptoKey_STATUS_SUCCESS         (0)

#define CryptoKey_STATUS_ERROR           (-1)

#define CryptoKey_STATUS_UNDEFINED_ENCODING    (-2)


typedef uint8_t CryptoKey_Encoding;
static const CryptoKey_Encoding CryptoKey_PLAINTEXT             = 0x02U;
static const CryptoKey_Encoding CryptoKey_BLANK_PLAINTEXT       = 0x04U;
static const CryptoKey_Encoding CryptoKey_KEYSTORE              = 0x08U;
static const CryptoKey_Encoding CryptoKey_BLANK_KEYSTORE        = 0x10U;
static const CryptoKey_Encoding CryptoKey_KEYBLOB               = 0x20U;
static const CryptoKey_Encoding CryptoKey_BLANK_KEYBLOB         = 0x40U;

typedef struct {
    uint8_t *keyMaterial;
    uint32_t keyLength;
} CryptoKey_Plaintext;

typedef struct {
    void* keyStore;
    uint32_t keyLength;
    uint32_t keyIndex;
} CryptoKey_KeyStore;

typedef struct {
    uint8_t *keyBlob;
    uint32_t keyBlobLength;
} CryptoKey_KeyBlob;

typedef struct {
    CryptoKey_Encoding encoding;
    union {
        CryptoKey_Plaintext plaintext;
        CryptoKey_KeyStore keyStore;
        CryptoKey_KeyBlob keyBlob;
    } u;
} CryptoKey;


typedef struct CryptoKey_SecurityPolicy_ CryptoKey_SecurityPolicy;

int_fast16_t CryptoKey_getCryptoKeyType(CryptoKey *keyHandle, CryptoKey_Encoding *keyType);

int_fast16_t CryptoKey_isBlank(CryptoKey *keyHandle, bool *isBlank);

int_fast16_t CryptoKey_markAsBlank(CryptoKey *keyHandle);

int_fast16_t CryptoKey_initSecurityPolicy(CryptoKey_SecurityPolicy *policy);

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_cryptoutils_cyptokey_CryptoKey__include */