UnknownKeyReceived Event

Signals that the server has introduced itself with an unknown key.

Syntax

public open class DefaultSftpclientEventListener : SftpclientEventListener {
  ...
  public override fun unknownKeyReceived(e: SftpclientUnknownKeyReceivedEvent) {}
  ...
}

public class SftpclientUnknownKeyReceivedEvent {
  val algorithm: String?
  val bits: Int
  val fingerprintSHA256: String?
  var action: Int
}

Remarks

The component fires this event to tell the application that the server has introduced itself with a key not present in TrustedKeysFile. The details of the key are provided. In this event handler, you need to make a decision whether to proceed with the connection.

Use ServerKey to access more key details.

Use Action to tell the component what it should do with the key, supported values: catAcceptOnce = 1, catAcceptPermanently = 2, catReject = 3. Note that accepting an unknown and unchecked key may be risky.