PureBasic

Use a PFX TLS Client Certificate

Demonstrates the Chilkat MailMan.SetSslClientCertPfx method, which sets the client-side certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file. The first argument is the path to the PFX file and the second is its password. This example loads a client certificate directly from a PFX.

Background: This is the convenience form of SetSslClientCert: rather than loading a Cert object first, you point straight at the PFX file and password. A PFX (PKCS#12) bundles the certificate with its private key — exactly what mutual TLS requires, since the client must prove possession of the key during the handshake. It is the usual client-credential format on Windows.

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IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the MailMan.SetSslClientCertPfx method, which sets the client-side
    ;  certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file.  The 1st argument
    ;  is the PFX path and the 2nd is the PFX password.

    mailman.i = CkMailMan::ckCreate()
    If mailman.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  Configure the SMTP server connection.
    CkMailMan::setCkSmtpHost(mailman, "smtp.example.com")
    CkMailMan::setCkSmtpPort(mailman, 465)
    CkMailMan::setCkSmtpSsl(mailman, 1)
    CkMailMan::setCkSmtpUsername(mailman, "user@example.com")
    CkMailMan::setCkSmtpPassword(mailman, "myPassword")

    ;  Load the client certificate directly from a PFX file.
    success = CkMailMan::ckSetSslClientCertPfx(mailman,"qa_data/certs/client.pfx","pfx_password")
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    success = CkMailMan::ckVerifySmtpLogin(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    Debug "Connected using a PFX TLS client certificate."

    ;  Note: The path "qa_data/certs/client.pfx" is a relative local filesystem path,
    ;  relative to the current working directory of the running application.


    CkMailMan::ckDispose(mailman)


    ProcedureReturn
EndProcedure