(DataFlex) Secure FTP with Client Certificate

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one.

Note: This example requires Chilkat v10.1.2 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoFtp
    Variant vCert
Store    Handle hoCertStore
    String sPassword
    Boolean iSuccess
    Variant vJsonCN
    Handle hoJsonCN
    Variant vCert
    Handle hoCert
    String sTemp1

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

    Get Create (RefClass(cComChilkatFtp2)) To hoFtp
    If (Not(IsComObjectCreated(hoFtp))) Begin
        Send CreateComObject of hoFtp
    End

    Set ComHostname Of hoFtp To "ftp.example.com"
    Set ComPort Of hoFtp To 21
    Set ComUsername Of hoFtp To "test"
    Set ComPassword Of hoFtp To "test"

    // This example will use explict TLS/SSL.
    // Establish an explicit secure channel after connection
    // on the standard FTP port 21.
    Set ComAuthTls Of hoFtp To True

    // The Ssl property is for establishing an implicit SSL connection
    // on port 990.  Because this example uses explicit SSL, it 
    // should remain False.
    Set ComSsl Of hoFtp To False

    // Load a certificate from a .pfx
    // A PFX may contain several certs, including the certificates
    // in a chain of authority.
    Get Create (RefClass(cComChilkatCertStore)) To hoCertStore
    If (Not(IsComObjectCreated(hoCertStore))) Begin
        Send CreateComObject of hoCertStore
    End

    Move "***" To sPassword
    // Load the certs from a PFX into an in-memory certificate store:
    Get ComLoadPfxFile Of hoCertStore "chilkat.pfx" sPassword To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCertStore To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Find the desired certificate.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonCN
    If (Not(IsComObjectCreated(hoJsonCN))) Begin
        Send CreateComObject of hoJsonCN
    End
    Get ComUpdateString Of hoJsonCN "CN" "cert common name" To iSuccess

    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get pvComObject of hoJsonCN to vJsonCN
    Get pvComObject of hoCert to vCert
    Get ComFindCert Of hoCertStore vJsonCN vCert To iSuccess
    If (iSuccess = False) Begin
        Showln "Certificate not found!"
        Procedure_Return
    End

    // Use this certificate for our secure (SSL/TLS) connection:
    Get pvComObject of hoCert to vCert
    Get ComSetSslClientCert Of hoFtp vCert To iSuccess

    // Connect and login to the FTP server.  The connection is 
    // made secure because of the AuthTls setting.
    Get ComConnect Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End
    Else Begin
        // LastErrorText contains information even when
        // successful. This allows you to visually verify
        // that the secure connection actually occurred.
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
    End

    Showln "Secure FTP Channel Established!"

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

    // .....
    // .....

    Get ComDisconnect Of hoFtp To iSuccess


End_Procedure