Find out available MessageDigest implementations

AvailableMessageDigests.scala

import scala.collection.JavaConverters._

object T {
  def main(args: Array[String]): Unit =
    java.security.Security.getProviders.iterator
      .flatMap(p => p.keySet.asScala)
      .map(_.asInstanceOf[String].split(" ")(0))
      .collect {
        case k if k startsWith "MessageDigest."           => k substring 14
        case k if k startsWith "Alg.Alias.MessageDigest." => k substring 24
      }
      .toSeq.sorted foreach println
}

output.txt

1.3.14.3.2.26
2.16.840.1.101.3.4.2.1
2.16.840.1.101.3.4.2.2
2.16.840.1.101.3.4.2.3
2.16.840.1.101.3.4.2.4
MD2
MD5
MD5
OID.1.3.14.3.2.26
OID.2.16.840.1.101.3.4.2.1
OID.2.16.840.1.101.3.4.2.2
OID.2.16.840.1.101.3.4.2.3
OID.2.16.840.1.101.3.4.2.4
SHA
SHA
SHA-1
SHA-224
SHA-256
SHA-384
SHA-512
SHA1