Checksums

One liner checksum for files:

file.md5() // equivalent to file.checksum("md5")
file.sha1()
file.sha256()
file.sha512()

Note: The above also works for directories (it recursively computes for each file in the directory).

For input/output streams:

val md5: String = inputstream.md5.hexDigest()
val md5: String = outputstream.md5.hexDigest()

The above consumes and closes the inputstream. If you want to write it to a file AND also compute the sha512, you can do:

val md5: String = inputstream.sha512.hexDigest(drainTo = someFile)