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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright 2018-2020 NXP
*
* Cipher interface calling the crypto driver.
*/
#ifndef __DRVCRYPT_CIPHER_H__
#define __DRVCRYPT_CIPHER_H__
#include <crypto/crypto_impl.h>
#include <tee_api_types.h>
/*
* Cipher operation context
*/
struct crypto_cipher {
struct crypto_cipher_ctx cipher_ctx; /* Crypto cipher API context */
void *ctx; /* Cipher context */
struct drvcrypt_cipher *op; /* Reference to the operation */
};
/*
* Cipher algorithm initialization data
*/
struct drvcrypt_cipher_init {
void *ctx; /* Software context */
bool encrypt; /* Encrypt or decrypt direction */
struct drvcrypt_buf key1; /* First key */
struct drvcrypt_buf key2; /* Second key */
struct drvcrypt_buf iv; /* Initial vector */
};
/*
* Cipher algorithm update data
*/
struct drvcrypt_cipher_update {
void *ctx; /* Software context */
bool encrypt; /* Encrypt or decrypt direction */
bool last; /* Last block to handle */
struct drvcrypt_buf src; /* Buffer source (message or cipher) */
struct drvcrypt_buf dst; /* Buffer dest (message or cipher) */
};
/*
* Crypto library cipher driver operations
*/
struct drvcrypt_cipher {
/* Allocate context */
TEE_Result (*alloc_ctx)(void **ctx, uint32_t algo);
/* Free context */
void (*free_ctx)(void *ctx);
/* Initialize the cipher operation */
TEE_Result (*init)(struct drvcrypt_cipher_init *dinit);
/* Update the cipher operation */
TEE_Result (*update)(struct drvcrypt_cipher_update *dupdate);
/* Finalize the cipher operation */
void (*final)(void *ctx);
/* Copy cipher context */
void (*copy_state)(void *dst_ctx, void *src_ctx);
};
/*
* Register a cipher processing driver in the crypto API
*
* @ops - Driver operations
*/
static inline TEE_Result drvcrypt_register_cipher(struct drvcrypt_cipher *ops)
{
return drvcrypt_register(CRYPTO_CIPHER, (void *)ops);
}
#endif /* __DRVCRYPT_CIPHER_H__ */
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