Delphi DLL Requires Chilkat v11.0.0+

SFTP Authentication using an SSH Certificate

See more SFTP Examples

Demonstrates how to SFTP authenticate using an SSH certificate. Delphi DLL

var
success: Boolean;
sbSshCert: HCkStringBuilder;
sbPrivKey: HCkStringBuilder;
key: HCkSshKey;
sftp: HCkSFtp;
hostname: PWideChar;
port: Integer;

begin
success := False;

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

sbSshCert := CkStringBuilder_Create();
success := CkStringBuilder_LoadFile(sbSshCert,'qa_data/sshCert/user_ecdsa_key-cert.pub','utf-8');
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to load user_ecdsa_key-cert.pub');
    Exit;
  end;

sbPrivKey := CkStringBuilder_Create();
success := CkStringBuilder_LoadFile(sbPrivKey,'qa_data/sshKeys/user_ecdsa_key','utf-8');
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to load user_ecdsa_key');
    Exit;
  end;

key := CkSshKey_Create();
//  Provide the password if the user_ecdsa_key is stored in an encrypted format.
CkSshKey_putPassword(key,'secret');
success := CkSshKey_FromOpenSshPrivateKey(key,CkStringBuilder__getAsString(sbPrivKey));
if (success = False) then
  begin
    Memo1.Lines.Add(CkSshKey__lastErrorText(key));
    Exit;
  end;

//  Indicate that the SSH certificate is to be used for authentication.
//  The UseSshCertificate method was added in Chilkat v11.0.0
CkSshKey_UseSshCertificate(key,CkStringBuilder__getAsString(sbSshCert));

sftp := CkSFtp_Create();

hostname := 'sftp.example.com';
port := 22;
success := CkSFtp_Connect(sftp,hostname,port);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

success := CkSFtp_AuthenticatePk(sftp,'myLogin',key);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

Memo1.Lines.Add('Public-Key Authentication using an SSH Certificate was Successful!');

CkStringBuilder_Dispose(sbSshCert);
CkStringBuilder_Dispose(sbPrivKey);
CkSshKey_Dispose(key);
CkSFtp_Dispose(sftp);