cx_blake3.h

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#ifdef HAVE_BLAKE3
 
#ifndef CX_BLAKE3_H
#define CX_BLAKE3_H
 
#include "lcx_blake3.h"
#include <stddef.h>
#include <stdint.h>
#include "cx_errors.h"
 
#define BLAKE3_KEY_LEN   32
#define BLAKE3_CHUNK_LEN 1024
 
enum blake3_flags {
    CHUNK_START         = 1 << 0,
    CHUNK_END           = 1 << 1,
    PARENT              = 1 << 2,
    ROOT                = 1 << 3,
    KEYED_HASH          = 1 << 4,
    DERIVE_KEY_CONTEXT  = 1 << 5,
    DERIVE_KEY_MATERIAL = 1 << 6,
    LAST                = 1 << 7,
};
 
typedef struct {
    uint32_t input_cv[BLAKE3_NB_OF_WORDS];
    uint64_t counter;
    uint8_t  block[BLAKE3_BLOCK_LEN];
    uint8_t  block_len;
    uint8_t  d;
} cx_blake3_state_out_t;
 
// Initialization vectors
static const uint32_t IV[8] = {0x6A09E667UL,
                               0xBB67AE85UL,
                               0x3C6EF372UL,
                               0xA54FF53AUL,
                               0x510E527FUL,
                               0x9B05688CUL,
                               0x1F83D9ABUL,
                               0x5BE0CD19UL};
// Permutational key schedule used to permute the message words after each round
// of the compression function
static const uint8_t MSG_SCHEDULE[7][16] = {
    {0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
    {2,  6,  3,  10, 7,  0,  4,  13, 1,  11, 12, 5,  9,  14, 15, 8 },
    {3,  4,  10, 12, 13, 2,  7,  14, 6,  5,  9,  0,  11, 15, 8,  1 },
    {10, 7,  12, 9,  14, 3,  13, 15, 4,  0,  11, 2,  5,  8,  1,  6 },
    {12, 13, 9,  11, 15, 10, 14, 8,  7,  2,  5,  3,  0,  1,  6,  4 },
    {9,  14, 11, 5,  8,  12, 15, 1,  13, 3,  0,  10, 2,  6,  4,  7 },
    {11, 15, 5,  0,  1,  9,  8,  6,  14, 10, 2,  12, 3,  4,  7,  13}
};
 
#endif  // CX_BLAKE3_H
#endif  // HAVE_BLAKE3