hkdf() public method

Implements HKDF specified in RFC 5869. Recommend use one of the SHA-2 hash algorithms: sha224, sha256, sha384 or sha512.
public hkdf ( string $algo, string $inputKey, string $salt = null, string $info = null, integer $length ) : string
$algo string a hash algorithm supported by `hash_hmac()`, e.g. 'SHA-256'
$inputKey string the source key
$salt string the random salt
$info string optional info to bind the derived key material to application- and context-specific information, e.g. a user ID or API version, see [RFC 5869](https://tools.ietf.org/html/rfc5869)
$length integer length of the output key in bytes. If 0, the output key is the length of the hash algorithm output.
return string the derived key
Security Class Documentation
示例#1
0
 /**
  * @inheritdoc
  */
 public function hkdf($algo, $inputKey, $salt = null, $info = null, $length = 0)
 {
     return parent::hkdf($algo, $inputKey, $salt, $info, $length);
 }