mirror of
https://github.com/BLAKE3-team/BLAKE3
synced 2024-05-11 09:36:09 +02:00
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
#ifndef BLAKE3_H
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#define BLAKE3_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define BLAKE3_KEY_LEN 32
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#define BLAKE3_OUT_LEN 32
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#define BLAKE3_BLOCK_LEN 64
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#define BLAKE3_CHUNK_LEN 1024
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#define BLAKE3_MAX_DEPTH 54
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#define BLAKE3_MAX_SIMD_DEGREE 16
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// This struct is a private implementation detail. It has to be here because
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// it's part of blake3_hasher below.
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typedef struct {
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uint32_t cv[8];
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uint64_t chunk_counter;
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uint8_t buf[BLAKE3_BLOCK_LEN];
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uint8_t buf_len;
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uint8_t blocks_compressed;
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uint8_t flags;
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} blake3_chunk_state;
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typedef struct {
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uint32_t key[8];
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blake3_chunk_state chunk;
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uint8_t cv_stack_len;
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// The stack size is MAX_DEPTH + 1 because we do lazy merging. For example,
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// with 7 chunks, we have 3 entries in the stack. Adding an 8th chunk
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// requires a 4th entry, rather than merging everything down to 1, because we
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// don't know whether more input is coming. This is different from how the
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// reference implementation does things.
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uint8_t cv_stack[(BLAKE3_MAX_DEPTH + 1) * BLAKE3_OUT_LEN];
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} blake3_hasher;
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void blake3_hasher_init(blake3_hasher *self);
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void blake3_hasher_init_keyed(blake3_hasher *self,
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const uint8_t key[BLAKE3_KEY_LEN]);
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void blake3_hasher_init_derive_key(blake3_hasher *self, const char *context);
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void blake3_hasher_update(blake3_hasher *self, const void *input,
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size_t input_len);
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void blake3_hasher_finalize(const blake3_hasher *self, uint8_t *out,
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size_t out_len);
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#ifdef __cplusplus
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}
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#endif
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#endif /* BLAKE3_H */
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