(C++) Use PuTTY Key for SSH Tunnel (PPK Private Key)

Demonstrates how to authenticate with a username + .ppk PuTTY private key w/ SSH Tunnel.

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#include <CkSshTunnel.h>
#include <CkSshKey.h>

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

    CkSshTunnel tunnel;

    // Load a .ppk PuTTY private key.
    CkSshKey puttyKey;
    const char *ppkText = puttyKey.loadText("qa_data/ppk/putty_private_secret.ppk");

    // The ppkText contains this content:

    // 	PuTTY-User-Key-File-2: ssh-rsa
    // 	Encryption: aes256-cbc
    // 	Comment: rsa-key-20170126
    // 	Public-Lines: 6
    // 	AAAAB3NzaC1yc2EAAAABJQAAAQEAx+52s7vvaZ8rT2UdFZWlSUVDHDQ+5ZRFvgRW
    // 	6nm2sO1c9WqNg7u2PQL4jeKSDX2XWcMnpleALz2x8Rr4rMy5E1iZzvWov8VtFd8l
    // 	fa9HOkgEeJB3VFuYR3NlnD3eyCoYJYPVpHJHrIeui2WZs5vQ76HDe+th8+z5Ald4
    // 	zPw3p2c6ZJpBrkSBM67hWokoBDi23c7NhszDHhJBrv+B98cQxnagI1PUKqN7E8Vg
    // 	bNtBI8beIMHyI69up9G1AXSEi0cGIjYNx9RNUPau1mRk/SvfqxgWkAjM005lj7hc
    // 	bOsjbdKK3T2NtrKTaYjEiXlEXcj1iGuApsD/m73pYaEJB3Nd7w==
    // 	Private-Lines: 14
    // 	MoaDbq0owouN/7Z9Pga0favDhM2bSEgMErJBxdDmNUXIVVcUoLiD/Ps1RA+BeBBX
    // 	wxqKUt9PqLy/pnafPR/i2xjJiQtQ0CWkPxND16Gi1dqLzmbQYYl1ev4+LzuG0zNX
    // 	HDGMvRiwagY7mY+F1tUjBYfOL6z8XHw4m40YcY1QorOO+0MMzAVT5Hkg8YyXW209
    // 	B/V/LRADFMVA2BlL39y11cb5ZpFStPH/waYUMY+2w1ZmJZ7dcRoMjuKmY+YE/tUx
    // 	n9X3P0qTNSbw6e6sMG3Dhr1vfoJUQWApUliD6GpUiCeIvXBcVqG8Vsfq9XADsPl0
    // 	+nFAwjSZflywcB7/FwhGb7q5UmcJK06SzoMl7Og5e3g7NCs3yNNQIv+qCpDjhxrA
    // 	hpT03mbipu7OXCZDeUwUhMGJAmYHE5iqm1rPCsSVbaMgpxhCWf01Cx4gLx3aMvn4
    // 	MdylA31GuL3wSxcWTslrOI8+449lZN/qZEnGEZkYTrnlu123jTqsAWMMtuHSz2Ig
    // 	6GA89oTdlppkNflhNH3OJ85kMUrc3p/ZBMdndz8jTDTljmJjHR5oNMoShFof115A
    // 	nWjUHqBwCgcubLYyH3afDvBTOhtl0tJ9Oby0wJlOAGnCXiPSDbF/y7J7xml/PS9t
    // 	XlSVNxtAY15NDO6Fp96sBVfKuJsfJ90PzdBom4ikIuf7sMwtElrHHLuYfcXJQYLp
    // 	G5jBmqDgnirosVPEBIxlxFzz/HCRmdU+tsYg46gqI4R5UpKUe8WSaJoZkDGsrqhm
    // 	e+1SJaBuafR4v2bx/bV414Hg7LGQosK2S3crxH4UgZl+g02vWznZfBH+9CmHvKDR
    // 	AxfcKOTzsaILKJtQPV81lmJ45sARYMcB5jMiE4kBg56hiXouChsvKkm55WVcW1E+
    // 	Private-MAC: 17512c9f7582c1d9c3ae2b01b4d67a6b1dbd1d0e

    // "secret" is the actual password for the above PPK.
    puttyKey.put_Password("secret");
    bool success = puttyKey.FromPuttyPrivateKey(ppkText);
    if (success != true) {
        std::cout << puttyKey.lastErrorText() << "\r\n";
        return;
    }

    const char *sshHostname = "sftp.example.com";
    int sshPort = 22;

    // Connect to an SSH server
    success = tunnel.Connect(sshHostname,sshPort);
    if (success != true) {
        std::cout << tunnel.lastErrorText() << "\r\n";
        return;
    }

    // Authenticate with the SSH server using a username + private key.
    // (The private key serves as the password.  The username identifies
    // the SSH user account on the server.)
    success = tunnel.AuthenticatePk("mySshLogin",puttyKey);
    if (success != true) {
        std::cout << tunnel.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "OK, the connection and authentication with the SSH server is completed." << "\r\n";

    // This example is only to show the connection + authentication using a PuTTY private key...
    }