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/*
* Copyright 2017-2021 NXP
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#ifndef __HASH_H__
#define __HASH_H__
#include <stdbool.h>
/* List of hash algorithms */
enum hash_algo {
SHA1 = 0,
SHA256
};
/* number of bytes in the SHA256-256 digest */
#define SHA256_DIGEST_SIZE 32
/*
* number of words in the digest - Digest is kept internally
* as 8 32-bit words
*/
#define _SHA256_DIGEST_LENGTH 8
/*
* block length - A block, treated as a sequence of
* 32-bit words
*/
#define SHA256_BLOCK_LENGTH 16
/* number of bytes in the block */
#define SHA256_DATA_SIZE 64
#define MAX_SG 12
struct sg_entry {
#if defined(NXP_SEC_LE)
uint32_t addr_lo; /* Memory Address - lo */
uint32_t addr_hi; /* Memory Address of start of buffer - hi */
#else
uint32_t addr_hi; /* Memory Address of start of buffer - hi */
uint32_t addr_lo; /* Memory Address - lo */
#endif
uint32_t len_flag; /* Length of the data in the frame */
#define SG_ENTRY_LENGTH_MASK 0x3FFFFFFF
#define SG_ENTRY_EXTENSION_BIT 0x80000000
#define SG_ENTRY_FINAL_BIT 0x40000000
uint32_t bpid_offset;
#define SG_ENTRY_BPID_MASK 0x00FF0000
#define SG_ENTRY_BPID_SHIFT 16
#define SG_ENTRY_OFFSET_MASK 0x00001FFF
#define SG_ENTRY_OFFSET_SHIFT 0
};
/*
* SHA256-256 context
* contain the following fields
* State
* count low
* count high
* block data buffer
* index to the buffer
*/
struct hash_ctx {
struct sg_entry sg_tbl[MAX_SG];
uint32_t hash_desc[64];
uint8_t hash[SHA256_DIGEST_SIZE];
uint32_t sg_num;
uint32_t len;
uint8_t *data;
enum hash_algo algo;
bool active;
};
int hash_init(enum hash_algo algo, void **ctx);
int hash_update(enum hash_algo algo, void *context, void *data_ptr,
unsigned int data_len);
int hash_final(enum hash_algo algo, void *context, void *hash_ptr,
unsigned int hash_len);
#endif
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