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- // SPDX-License-Identifier: GPL-2.0+
- #include <linux/xxhash.h>
- #include <linux/unaligned/access_ok.h>
- #include <linux/types.h>
- #include <u-boot/sha256.h>
- #include <u-boot/crc.h>
- static u32 btrfs_crc32c_table[256];
- void btrfs_hash_init(void)
- {
- static int inited = 0;
- if (!inited) {
- crc32c_init(btrfs_crc32c_table, 0x82F63B78);
- inited = 1;
- }
- }
- int hash_sha256(const u8 *buf, size_t length, u8 *out)
- {
- sha256_context ctx;
- sha256_starts(&ctx);
- sha256_update(&ctx, buf, length);
- sha256_finish(&ctx, out);
- return 0;
- }
- int hash_xxhash(const u8 *buf, size_t length, u8 *out)
- {
- u64 hash;
- hash = xxh64(buf, length, 0);
- put_unaligned_le64(hash, out);
- return 0;
- }
- int hash_crc32c(const u8 *buf, size_t length, u8 *out)
- {
- u32 crc;
- crc = crc32c_cal((u32)~0, (char *)buf, length, btrfs_crc32c_table);
- put_unaligned_le32(~crc, out);
- return 0;
- }
- u32 crc32c(u32 seed, const void * data, size_t len)
- {
- return crc32c_cal(seed, data, len, btrfs_crc32c_table);
- }
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