Scrypt key derivation function. More...

Static Public Member Functions
static	calc ($password, $salt, $n, $r, $p, $length)
	Execute the scrypt algorithm.

Static Protected Member Functions
static	scryptROMix ($b, $n, $r)
	scryptROMix

static	scryptBlockMix ($b, $r)
	scryptBlockMix

static	salsa208Core32 ($b)
	Salsa 20/8 core (32 bit version)

static	salsa208Core64 ($b)
	Salsa 20/8 core (64 bit version)

static	integerify ($b)
	Integerify.

Detailed Description

Scrypt key derivation function.

See Also: http://www.tarsnap.com/scrypt.html; https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01

Member Function Documentation

static calc	(	$password,
		$salt,
		$n,
		$r,
		$p,
		$length
	)

static

Execute the scrypt algorithm.

Parameters

string	$password
string	$salt
int	$n	CPU cost
int	$r	Memory cost
int	$p	parallelization cost
int	$length	size of the output key

Returns: string

static integerify ( $b )

staticprotected

Integerify.

Integerify (B[0] ... B[2 * r - 1]) is defined as the result of interpreting B[2 * r - 1] as a little-endian integer. Each block B is a string of 64 bytes.

Parameters

string $b