Dart

SFTP Host Key Fingerprint

See more SFTP Examples

Demonstrates how to get the SSH server's host key fingerprint after connecting. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final sftp = CkSFtp();

  final hostname = 'sftp.example.com';
  final port = 22;
  try {
    sftp.connect(hostname, port);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get the classic MD5 fingeprint
  final md5Fingerprint = sftp.hostKeyFingerprint;
  print(md5Fingerprint);

  // Sample output:
  // ssh-rsa 3072 21:b0:d8:41:4e:ef:78:10:20:af:01:b7:71:5d:eb:94

  // Starting in Chilkat v9.5.0.92, we can also get the SHA256 fingerprint.
  // (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

  var includeKeyType = true;
  var includeHashName = true;
  var sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  print(sha256Fingerprint);

  // Sample output:
  // ssh-rsa SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  // The key type and hash name can be optionally included or not.
  includeKeyType = false;
  includeHashName = true;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  print(sha256Fingerprint);

  // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType = true;
  includeHashName = false;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  print(sha256Fingerprint);

  // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType = false;
  includeHashName = false;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  print(sha256Fingerprint);

  // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=
}