| /* Copyright 2012 The ChromiumOS Authors |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| /* SHA-256 functions */ |
| |
| #ifndef __CROS_EC_SHA256_H |
| #define __CROS_EC_SHA256_H |
| |
| #include "common.h" |
| |
| #define SHA256_DIGEST_SIZE 32 |
| #define SHA256_BLOCK_SIZE 64 |
| |
| #ifdef CONFIG_SHA256_HW_ACCELERATE |
| /* |
| * The chip's header file must implement the SHA256 context structure and |
| * specific functions for its hardware accelerator module. |
| */ |
| #include "sha256_chip.h" |
| #else |
| /* SHA256 context */ |
| struct sha256_ctx { |
| uint32_t h[8]; |
| uint32_t tot_len; |
| uint32_t len; |
| uint8_t block[2 * SHA256_BLOCK_SIZE]; |
| uint8_t buf[SHA256_DIGEST_SIZE]; /* Used to store the final digest. */ |
| }; |
| #endif |
| |
| void SHA256_init(struct sha256_ctx *ctx); |
| void SHA256_update(struct sha256_ctx *ctx, const uint8_t *data, uint32_t len); |
| uint8_t *SHA256_final(struct sha256_ctx *ctx); |
| |
| void hmac_SHA256(uint8_t *output, const uint8_t *key, const int key_len, |
| const uint8_t *message, const int message_len); |
| |
| #endif /* __CROS_EC_SHA256_H */ |