As described on GetSystemUrl, you can use a few predefined methods exposed on SysSingleton. These methods are implemented in Turnkey to allow for common things without needing to use CodeDress (that will work around anything).

BitConverterToString(bytes:Blob):String - Given a byte array, it will return a string like 01-A0-FF... for the bytes.

SHA512ComputeHash(bytes:Blob):Blob - Given a byte array, it will return the SHA512 checksum in bytes.

SHA256ComputeHash(bytes:Blob):Blob - Given a byte array, it will return the SHA256 checksum in bytes.