Auth_OpenID_CryptUtil Class Reference

Static Public Member Functions
static	getBytes ($num_bytes)
static	randomString ($length, $population=null)
static	constEq ($s1, $s2)

Detailed Description

Definition at line 26 of file CryptUtil.php.

Member Function Documentation

constEq()

static Auth_OpenID_CryptUtil::constEq (   $s1,   $s2  )

static

Definition at line 108 of file CryptUtil.php.

References $result.

Referenced by Auth_OpenID_Association\checkMessageSignature().

getBytes()

static Auth_OpenID_CryptUtil::getBytes (   $num_bytes )

static

Get the specified number of random bytes.

Attempts to use a cryptographically secure (not predictable) source of randomness if available. If there is no high-entropy randomness source available, it will fail. As a last resort, for non-critical systems, define Auth_OpenID_RAND_SOURCE as null, and the code will fall back on a pseudo-random number generator.

Parameters

int

$num_bytes

The length of the return value

Returns

string $bytes random bytes

Definition at line 40 of file CryptUtil.php.

References E_USER_ERROR.

Referenced by Auth_OpenID_Signatory\createAssociation(), Auth_OpenID_MathLibrary\rand(), and randomString().

randomString()

static Auth_OpenID_CryptUtil::randomString (   $length,   $population = null  )

static

Produce a string of length random bytes, chosen from chrs. If $chrs is null, the resulting string may contain any characters.

Parameters

integer	$length	The length of the resulting randomly-generated string
string	$chrs	A string of characters from which to choose to build the new string

Returns

string $result A string of randomly-chosen characters from $chrs

Definition at line 80 of file CryptUtil.php.

References E_USER_ERROR, and getBytes().

Referenced by Auth_OpenID_mkNonce().