| /* Copyright 2021 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| * Constants & macro for sha algorithms. |
| */ |
| |
| #ifndef VBOOT_REFERENCE_2SHA_PRIVATE_H_ |
| #define VBOOT_REFERENCE_2SHA_PRIVATE_H_ |
| |
| /* Sha256 padding is consisted of 0x80 + zeros + length of message (8 byte). |
| * So minimum length for padding is 9. |
| */ |
| #define SHA256_MIN_PAD_LEN 9 |
| |
| /* Beginning of sha256 padding is always 0x80 when messages are in bytes |
| */ |
| #define SHA256_PAD_BEGIN 0x80 |
| |
| extern const uint32_t vb2_sha256_h0[8]; |
| extern const uint32_t vb2_sha256_k[64]; |
| |
| #define UNPACK32(x, str) \ |
| { \ |
| *((str) + 3) = (uint8_t) ((x) ); \ |
| *((str) + 2) = (uint8_t) ((x) >> 8); \ |
| *((str) + 1) = (uint8_t) ((x) >> 16); \ |
| *((str) + 0) = (uint8_t) ((x) >> 24); \ |
| } |
| |
| #define PACK32(str, x) \ |
| { \ |
| *(x) = ((uint32_t) *((str) + 3) ) \ |
| | ((uint32_t) *((str) + 2) << 8) \ |
| | ((uint32_t) *((str) + 1) << 16) \ |
| | ((uint32_t) *((str) + 0) << 24); \ |
| } |
| #endif /* VBOOT_REFERENCE_2SHA_PRIVATE_H_ */ |
