70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/xxhash.h>
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#include <linux/unaligned/access_ok.h>
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#include <linux/types.h>
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#include <u-boot/sha256.h>
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#include <u-boot/blake2.h>
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#include <u-boot/crc.h>
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static u32 btrfs_crc32c_table[256];
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void btrfs_hash_init(void)
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{
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static int inited = 0;
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if (!inited) {
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crc32c_init(btrfs_crc32c_table, 0x82F63B78);
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inited = 1;
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}
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}
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int hash_sha256(const u8 *buf, size_t length, u8 *out)
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{
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sha256_context ctx;
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sha256_starts(&ctx);
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sha256_update(&ctx, buf, length);
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sha256_finish(&ctx, out);
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return 0;
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}
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int hash_xxhash(const u8 *buf, size_t length, u8 *out)
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{
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u64 hash;
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hash = xxh64(buf, length, 0);
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put_unaligned_le64(hash, out);
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return 0;
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}
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/* We use the full CSUM_SIZE(32) for BLAKE2B */
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#define BTRFS_BLAKE2_HASH_SIZE 32
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int hash_blake2(const u8 *buf, size_t length, u8 *out)
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{
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blake2b_state S;
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blake2b_init(&S, BTRFS_BLAKE2_HASH_SIZE);
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blake2b_update(&S, buf, length);
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blake2b_final(&S, out, BTRFS_BLAKE2_HASH_SIZE);
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return 0;
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}
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int hash_crc32c(const u8 *buf, size_t length, u8 *out)
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{
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u32 crc;
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crc = crc32c_cal((u32)~0, (char *)buf, length, btrfs_crc32c_table);
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put_unaligned_le32(~crc, out);
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return 0;
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}
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u32 crc32c(u32 seed, const void * data, size_t len)
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{
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return crc32c_cal(seed, data, len, btrfs_crc32c_table);
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}
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