(Go) Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

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

    // Important:  Before running this program, convert your
    // .crt and .key files to a .p12 using OpenSSL:
    // The command is this:
    // openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
    // 

    ftp := chilkat.NewFtp2()

    ftp.SetHostname("ftp.***.com")
    ftp.SetPort(21)
    ftp.SetUsername("testLogin")
    ftp.SetPassword("testPassword")

    // This example will use explict TLS/SSL.
    // Establish an explicit secure channel after connection
    // on the standard FTP port 21.
    ftp.SetAuthTls(true)

    // The Ssl property is for establishing an implicit SSL connection
    // on port 990.  Because this example uses explicit SSL, it 
    // should remain false.
    ftp.SetSsl(false)

    // Create an instance of a certificate store object, load a .p12 file,
    // locate the certificate we need, and use it for signing.
    // (a P12/PFX file may contain more than one certificate.)
    certStore := chilkat.NewCertStore()
    // The 1st argument is the filename, the 2nd arg is the 
    // .p12 file's password.  (OpenSSL will prompty you to set a password
    // when converting the .crt and .key into a .p12).
    success := certStore.LoadPfxFile("test.p12","secret")
    if success != true {
        fmt.Println(certStore.LastErrorText())
        ftp.DisposeFtp2()
        certStore.DisposeCertStore()
        return
    }

    cert := certStore.FindCertBySubjectCN("Your cert's common name")
    if certStore.LastMethodSuccess() == false {
        fmt.Println(certStore.LastErrorText())
        ftp.DisposeFtp2()
        certStore.DisposeCertStore()
        return
    }

    success = ftp.SetSslClientCert(cert)

    cert.DisposeCert()

    // Connect and login to the FTP server.
    success = ftp.Connect()
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        certStore.DisposeCertStore()
        return
    }
    else {
        // LastErrorText contains information even when
        // successful. This allows you to visually verify
        // that the secure connection actually occurred.
        fmt.Println(ftp.LastErrorText())
    }

    fmt.Println("Secure FTP Channel Established!")
    fmt.Println(ftp.LastErrorText())

    // Do whatever you're doing to do ...
    // upload files, download files, etc...

    // ...
    // ...

    success = ftp.Disconnect()

    ftp.DisposeFtp2()
    certStore.DisposeCertStore()