protected function sha512Asn1($data)
    {
        $digest = hash('sha512', $data, true);

        // this ASN1 header is sha512 specific
        $asn1 = chr(0x30).chr(0x51);
        $asn1 .= chr(0x30).chr(0x0d);
        $asn1 .= chr(0x06).chr(0x09);
        $asn1 .= chr(0x60).chr(0x86).chr(0x48).chr(0x01).chr(0x65);
        $asn1 .= chr(0x03).chr(0x04);
        $asn1 .= chr(0x02).chr(0x03);
        $asn1 .= chr(0x05).chr(0x00);
        $asn1 .= chr(0x04).chr(0x40);
        $asn1 .= $digest;

        return $asn1;
    }
protected function sha512Asn1($data)
    {
        $digest = hash('sha512', $data, true);

        // this ASN1 header is sha512 specific
        $asn1 = chr(0x30).chr(0x51);
        $asn1 .= chr(0x30).chr(0x0d);
        $asn1 .= chr(0x06).chr(0x09);
        $asn1 .= chr(0x60).chr(0x86).chr(0x48).chr(0x01).chr(0x65);
        $asn1 .= chr(0x03).chr(0x04);
        $asn1 .= chr(0x02).chr(0x03);
        $asn1 .= chr(0x05).chr(0x00);
        $asn1 .= chr(0x04).chr(0x40);
        $asn1 .= $digest;

        return $asn1;
    }
protected function sha512Asn1 ( $ data ) { $ digest = hash ( 'sha512' , $ data , true ) ; // this ASN1 header is sha512 specific $ asn1 = chr ( 0x30 ) . chr ( 0x51 ) ; $ asn1 .= chr ( 0x30 ) . chr ( 0x0d ) ; $ asn1 .= chr ( 0x06 ) . chr ( 0x09 ) ; $ asn1 .= chr ( 0x60 ) . chr ( 0x86 ) . chr ( 0x48 ) . chr ( 0x01 ) . chr ( 0x65 ) ; $ asn1 .= chr ( 0x03 ) . chr ( 0x04 ) ; $ asn1 .= chr ( 0x02 ) . chr ( 0x03 ) ; $ asn1 .= chr ( 0x05 ) . chr ( 0x00 ) ; $ asn1 .= chr ( 0x04 ) . chr ( 0x40 ) ; $ asn1 .= $ digest ; return $ asn1 ; }
Create a digest of the given data, with an asn1 header.

@param string $data Data to create a digest of

@return string
Create a digest of the given data with an asn1 header .