C++ (Cpp) erandom_get_random_bytesの例

コード例 #1

ファイル: frandom.c プロジェクト: andi34/Dhollmen_Kernel

static void init_rand_state(struct frandom_state *state, int seedflag)
{
	unsigned int i, j, k;
	u8 *S;
	u8 *seed = state->buf;

	if (seedflag == INTERNAL_SEED)
		erandom_get_random_bytes(seed, 256);
	else
		get_random_bytes(seed, 256);

	S = state->S;
	for (i=0; i<256; i++)
		*S++=i;

	j=0;
	S = state->S;

	for (i=0; i<256; i++) {
		j = (j + S[i] + *seed++) & 0xff;
		swap_byte(&S[i], &S[j]);
	}

	/* It's considered good practice to discard the first 256 bytes generated. So we do it:	*/
	i=0; j=0;
	for (k=0; k<256; k++) {
		i = (i + 1) & 0xff;
		j = (j + S[i]) & 0xff;
		swap_byte(&S[i], &S[j]);
	}

	state->i = i; /* Save state */
	state->j = j;
}

コード例 #2

ファイル: frandom.c プロジェクト: Malpa73/FeraLab_GB_Firmware--archive

static void init_rand_state(struct frandom_state *state, int seedflag)
{
	unsigned int i, j, k;
	u8 *S;
	u8 *seed = state->buf;

	if (seedflag == INTERNAL_SEED)
		erandom_get_random_bytes(seed, 256);
	else
		get_random_bytes(seed, 256);

	S = state->S;
	for (i=0; i<256; i++)
		*S++=i;

	j=0;
	S = state->S;

	for (i=0; i<256; i++) {
		j = (j + S[i] + *seed++) & 0xff;
		swap_byte(&S[i], &S[j]);
	}

	i=0; j=0;
	for (k=0; k<256; k++) {
		i = (i + 1) & 0xff;
		j = (j + S[i]) & 0xff;
		swap_byte(&S[i], &S[j]);
	}

	state->i = i;
	state->j = j;
}