File syn_blake2s.c¶

FileList > crypto > syn_blake2s.c

BLAKE2s implementation — RFC 7693.

#include "../util/syn_pack.h"
#include "syn_blake2s.h"
#include <string.h>

Public Static Attributes¶

Type	Name
const uint32_t	blake2s_iv = `/* multi line expression /` BLAKE2s initialization vector.*
const uint8_t	sigma = `/* multi line expression /` BLAKE2s message word permutation schedule.*

Public Functions¶

Type	Name
void	syn_blake2s_final (SYN_BLAKE2s * ctx, uint8_t * out) Finalize and produce the digest.
void	syn_blake2s_init (SYN_BLAKE2s * ctx, size_t outlen) Initialize BLAKE2s for unkeyed hashing.
void	syn_blake2s_init_keyed (SYN_BLAKE2s * ctx, const void * key, size_t keylen, size_t outlen) Initialize BLAKE2s for keyed hashing (MAC mode).
void	syn_blake2s_update (SYN_BLAKE2s * ctx, const void * data, size_t len) Feed data into the hash.

Public Static Functions¶

Type	Name
void	blake2s_compress (SYN_BLAKE2s * ctx, const uint8_t block, int is_last) BLAKE2s compression (F). Mixes one 64-byte block into state.
void	blake2s_increment_counter (SYN_BLAKE2s * ctx, uint32_t inc) Increment byte counter.
uint32_t	load32_le (const uint8_t * p)
uint32_t	rotr32 (uint32_t x, unsigned n) 32-bit right rotation.
void	store32_le (uint8_t * p, uint32_t v)

Macros¶

Type	Name
define	G (v, a, b, c, d, x, y) `/* multi line expression /` BLAKE2s G mixing function.*

Public Static Attributes Documentation¶

variable blake2s_iv¶

BLAKE2s initialization vector.

const uint32_t blake2s_iv[8];

variable sigma¶

BLAKE2s message word permutation schedule.

const uint8_t sigma[10][16];

Public Functions Documentation¶

function syn_blake2s_final¶

Finalize and produce the digest.

void syn_blake2s_final (
    SYN_BLAKE2s * ctx,
    uint8_t * out
)

After calling this, the context must be re-initialized before reuse.

Parameters:

ctx BLAKE2s context.
out Output buffer (must be at least ctx->outlen bytes).

function syn_blake2s_init¶

Initialize BLAKE2s for unkeyed hashing.

void syn_blake2s_init (
    SYN_BLAKE2s * ctx,
    size_t outlen
)

Parameters:

ctx Context to initialize.
outlen Desired digest length (1–32).

function syn_blake2s_init_keyed¶

Initialize BLAKE2s for keyed hashing (MAC mode).

void syn_blake2s_init_keyed (
    SYN_BLAKE2s * ctx,
    const void * key,
    size_t keylen,
    size_t outlen
)

Parameters:

ctx Context to initialize.
key Secret key.
keylen Key length (1–32).
outlen Desired digest length (1–32).

function syn_blake2s_update¶

Feed data into the hash.

void syn_blake2s_update (
    SYN_BLAKE2s * ctx,
    const void * data,
    size_t len
)

Parameters:

ctx BLAKE2s context.
data Data to hash.
len Length in bytes.

Public Static Functions Documentation¶

function blake2s_compress¶

BLAKE2s compression (F). Mixes one 64-byte block into state.

static void blake2s_compress (
    SYN_BLAKE2s * ctx,
    const uint8_t block,
    int is_last
)

Parameters:

ctx Hash context.
block 64-byte input block.
is_last Flag indicating the last block.

function blake2s_increment_counter¶

Increment byte counter.

static inline void blake2s_increment_counter (
    SYN_BLAKE2s * ctx,
    uint32_t inc
)

Parameters:

ctx Hash context.
inc Increment value in bytes.

function load32_le¶

static inline uint32_t load32_le (
    const uint8_t * p
)

function rotr32¶

32-bit right rotation.

static inline uint32_t rotr32 (
    uint32_t x,
    unsigned n
)

Parameters:

x Value to rotate.
n Bits to shift.

Returns:

Rotated value.

function store32_le¶

static inline void store32_le (
    uint8_t * p,
    uint32_t v
)

Macro Definition Documentation¶

define G¶

BLAKE2s G mixing function.

#define G (
    v,
    a,
    b,
    c,
    d,
    x,
    y
) `/* multi line expression */`

Parameters:

v Working vector (16 words).
a Vector indices.
x Message words.

The documentation for this class was generated from the following file src/syntropic/crypto/syn_blake2s.c