chacha20.cpp File Reference

#include <crypto/chacha20.h>
#include <crypto/common.h>
#include <cstring>

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Macros
#define	QUARTERROUND(a, b, c, d)

Functions
static constexpr uint32_t	rotl32 (uint32_t v, int c)

Variables
static const uint8_t	sigma [] = "expand 32-byte k"
static const uint8_t	tau [] = "expand 16-byte k"

Macro Definition Documentation

QUARTERROUND

#define QUARTERROUND	(		a,
			b,
			c,
			d
	)

Value:

    do {                                                                       \
        a += b;                                                                \
        d = rotl32(d ^ a, 16);                                                 \
        c += d;                                                                \
        b = rotl32(b ^ c, 12);                                                 \
        a += b;                                                                \
        d = rotl32(d ^ a, 8);                                                  \
        c += d;                                                                \
        b = rotl32(b ^ c, 7);                                                  \
    } while (0)

Definition at line 17 of file chacha20.cpp.

Function Documentation

rotl32()

static constexpr uint32_t rotl32 ( uint32_t  v, int  c  )

inlinestaticconstexpr

Definition at line 13 of file chacha20.cpp.

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Variable Documentation

sigma

const uint8_t sigma[] = "expand 32-byte k"

static

Definition at line 29 of file chacha20.cpp.

tau

const uint8_t tau[] = "expand 16-byte k"

static

Definition at line 30 of file chacha20.cpp.