Qu Wenruo | 0e7b854 | 2020-06-24 18:02:48 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | |
| 3 | #include <linux/xxhash.h> |
| 4 | #include <linux/unaligned/access_ok.h> |
| 5 | #include <linux/types.h> |
| 6 | #include <u-boot/sha256.h> |
| 7 | #include <u-boot/crc.h> |
| 8 | |
| 9 | static u32 btrfs_crc32c_table[256]; |
| 10 | |
| 11 | void btrfs_hash_init(void) |
| 12 | { |
| 13 | static int inited = 0; |
| 14 | |
| 15 | if (!inited) { |
| 16 | crc32c_init(btrfs_crc32c_table, 0x82F63B78); |
| 17 | inited = 1; |
| 18 | } |
| 19 | } |
| 20 | |
| 21 | int hash_sha256(const u8 *buf, size_t length, u8 *out) |
| 22 | { |
| 23 | sha256_context ctx; |
| 24 | |
| 25 | sha256_starts(&ctx); |
| 26 | sha256_update(&ctx, buf, length); |
| 27 | sha256_finish(&ctx, out); |
| 28 | |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | int hash_xxhash(const u8 *buf, size_t length, u8 *out) |
| 33 | { |
| 34 | u64 hash; |
| 35 | |
| 36 | hash = xxh64(buf, length, 0); |
| 37 | put_unaligned_le64(hash, out); |
| 38 | |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | int hash_crc32c(const u8 *buf, size_t length, u8 *out) |
| 43 | { |
| 44 | u32 crc; |
| 45 | |
| 46 | crc = crc32c_cal((u32)~0, (char *)buf, length, btrfs_crc32c_table); |
| 47 | put_unaligned_le32(~crc, out); |
| 48 | |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | u32 crc32c(u32 seed, const void * data, size_t len) |
| 53 | { |
| 54 | return crc32c_cal(seed, data, len, btrfs_crc32c_table); |
| 55 | } |