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/*
* Copyright (c) 2022, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef STM32_SAES_H
#define STM32_SAES_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#define DT_SAES_COMPAT "st,stm32-saes"
struct stm32_saes_platdata {
uintptr_t base;
unsigned long clock_id;
unsigned int reset_id;
};
enum stm32_saes_chaining_mode {
STM32_SAES_MODE_ECB,
STM32_SAES_MODE_CBC,
STM32_SAES_MODE_CTR,
STM32_SAES_MODE_GCM,
STM32_SAES_MODE_CCM, /* Not use in TF-A */
};
enum stm32_saes_key_selection {
STM32_SAES_KEY_SOFT,
STM32_SAES_KEY_DHU, /* Derived HW unique key */
STM32_SAES_KEY_BH, /* Boot HW key */
STM32_SAES_KEY_BHU_XOR_BH, /* XOR of DHUK and BHK */
STM32_SAES_KEY_WRAPPED
};
struct stm32_saes_context {
uintptr_t base;
uint32_t cr;
uint32_t assoc_len;
uint32_t load_len;
uint32_t key[8]; /* In HW byte order */
uint32_t iv[4]; /* In HW byte order */
};
int stm32_saes_driver_init(void);
int stm32_saes_init(struct stm32_saes_context *ctx, bool is_decrypt,
enum stm32_saes_chaining_mode ch_mode, enum stm32_saes_key_selection key_select,
const void *key, size_t key_len, const void *iv, size_t iv_len);
int stm32_saes_update(struct stm32_saes_context *ctx, bool last_block,
uint8_t *data_in, uint8_t *data_out, size_t data_len);
int stm32_saes_update_assodata(struct stm32_saes_context *ctx, bool last_block,
uint8_t *data, size_t data_len);
int stm32_saes_update_load(struct stm32_saes_context *ctx, bool last_block,
uint8_t *data_in, uint8_t *data_out, size_t data_len);
int stm32_saes_final(struct stm32_saes_context *ctx, uint8_t *tag, size_t tag_len);
#endif
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