9cf0db802a
- Add Blake3 cryptographic hash library (portable C implementation) - Create Blake3DCR wrapper for Decred mining (180-byte block headers) - Register BLAKE3_DCR algorithm ID (0x62100000) with dcr/decred aliases - Support for block header hashing and nonce iteration 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*
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* BLAKE3 reference implementation
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* Based on https://github.com/BLAKE3-team/BLAKE3
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*
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* This is a minimal implementation for Decred mining.
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* For optimal performance, consider using SIMD-accelerated versions.
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*/
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#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_VERSION_STRING "1.8.2"
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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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// Initial vector (same as BLAKE2s)
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#define BLAKE3_IV_0 0x6A09E667UL
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#define BLAKE3_IV_1 0xBB67AE85UL
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#define BLAKE3_IV_2 0x3C6EF372UL
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#define BLAKE3_IV_3 0xA54FF53AUL
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#define BLAKE3_IV_4 0x510E527FUL
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#define BLAKE3_IV_5 0x9B05688CUL
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#define BLAKE3_IV_6 0x1F83D9ABUL
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#define BLAKE3_IV_7 0x5BE0CD19UL
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// Flags for domain separation
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enum blake3_flags {
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CHUNK_START = 1 << 0,
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CHUNK_END = 1 << 1,
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PARENT = 1 << 2,
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ROOT = 1 << 3,
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KEYED_HASH = 1 << 4,
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DERIVE_KEY_CONTEXT = 1 << 5,
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DERIVE_KEY_MATERIAL = 1 << 6,
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};
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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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uint8_t cv_stack[(BLAKE3_MAX_DEPTH + 1) * BLAKE3_OUT_LEN];
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} blake3_hasher;
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// Initialize hasher
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void blake3_hasher_init(blake3_hasher *self);
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void blake3_hasher_init_keyed(blake3_hasher *self, 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_init_derive_key_raw(blake3_hasher *self, const void *context, size_t context_len);
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// Update with input data
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void blake3_hasher_update(blake3_hasher *self, const void *input, size_t input_len);
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// Finalize and output
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void blake3_hasher_finalize(const blake3_hasher *self, uint8_t *out, size_t out_len);
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void blake3_hasher_finalize_seek(const blake3_hasher *self, uint64_t seek, uint8_t *out, size_t out_len);
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// Reset hasher for reuse
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void blake3_hasher_reset(blake3_hasher *self);
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// Simple one-shot hash function for mining
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void blake3_hash(const void *input, size_t input_len, uint8_t out[BLAKE3_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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