public static function saveBytesToChecksummedAsciiSafeString($header, $bytes)
{
// Headers must be a constant length to prevent one type's header from
// being a prefix of another type's header, leading to ambiguity.
if (Core::ourStrlen($header) !== self::SERIALIZE_HEADER_BYTES) {
throw new Ex\EnvironmentIsBrokenException('Header must be ' . self::SERIALIZE_HEADER_BYTES . ' bytes.');
}
return Encoding::binToHex($header . $bytes . \hash(self::CHECKSUM_HASH_ALGO, $header . $bytes, true));
} /**
* @expectedException \Defuse\Crypto\Exception\BadFormatException
* @expectedExceptionMessage not a hex string
*/
public function testBadHexEncoding()
{
$header = Core::secureRandom(Core::HEADER_VERSION_SIZE);
$str = Encoding::saveBytesToChecksummedAsciiSafeString($header, Core::secureRandom(Core::KEY_BYTE_SIZE));
$str[0] = 'Z';
Encoding::loadBytesFromChecksummedAsciiSafeString($header, $str);
}