Decrypt Maven settings from Groovy

maven_decrypt_settings.groovy

@Grapes([
    @Grab(group='org.sonatype.plexus', module='plexus-sec-dispatcher', version='1.4'),
    @Grab(group='org.codehaus.plexus', module='plexus-utils', version='1.5.15'),
    @Grab(group='org.eclipse.sisu', module='org.eclipse.sisu.plexus', version='0.3.4'),
])
import org.sonatype.plexus.components.cipher.DefaultPlexusCipher
import org.sonatype.plexus.components.sec.dispatcher.DefaultSecDispatcher

def decryptSetting(String encrypted, String encryptedMaster) {
  return decrypt(encrypted, decryptMaster(encryptedMaster))
}

def decrypt(String encrypted, String key) {
    DefaultPlexusCipher cipher = new DefaultPlexusCipher()
    return cipher.decryptDecorated(encrypted, key)
}

def decryptMaster(String encryptedMaster) {
    return decrypt(encryptedMaster, DefaultSecDispatcher.SYSTEM_PROPERTY_SEC_LOCATION)
}