Lazarus Pascal

SFTP Host Key Fingerprint

See more SFTP Examples

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

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.SFtp;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  sftp: TSFtp;
  hostname: string;
  port: Integer;
  md5_fingerprint: string;
  includeKeyType: Boolean;
  includeHashName: Boolean;
  sha256_fingerprint: string;

begin
  success := False;

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

  sftp := TSFtp.Create;

  hostname := 'sftp.example.com';
  port := 22;
  success := sftp.Connect(hostname,port);
  if (success <> True) then
    begin
      WriteLn(sftp.LastErrorText);
      Exit;
    end;

  //  Get the classic MD5 fingeprint
  md5_fingerprint := sftp.HostKeyFingerprint;
  WriteLn(md5_fingerprint);

  //  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.)

  includeKeyType := True;
  includeHashName := True;
  sha256_fingerprint := sftp.GetHostKeyFP('SHA256',includeKeyType,includeHashName);
  WriteLn(sha256_fingerprint);

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

  //  The key type and hash name can be optionally included or not.
  includeKeyType := False;
  includeHashName := True;
  sha256_fingerprint := sftp.GetHostKeyFP('SHA256',includeKeyType,includeHashName);
  WriteLn(sha256_fingerprint);

  //  SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType := True;
  includeHashName := False;
  sha256_fingerprint := sftp.GetHostKeyFP('SHA256',includeKeyType,includeHashName);
  WriteLn(sha256_fingerprint);

  //  ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType := False;
  includeHashName := False;
  sha256_fingerprint := sftp.GetHostKeyFP('SHA256',includeKeyType,includeHashName);
  WriteLn(sha256_fingerprint);

  //  Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=


  sftp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.