Visual FoxPro

Use a PEM TLS Client Certificate

Demonstrates the Chilkat MailMan.SetSslClientCertPem method, which sets the client-side certificate for SSL/TLS connections, loading it from PEM data or from a PEM file. The first argument may contain the PEM text itself or a path to a PEM file; the second is the PEM password. This example loads the client certificate from a PEM file.

Background: PEM is the familiar Base64 text format bracketed by -----BEGIN CERTIFICATE----- lines, and a single PEM can hold both a certificate and its (optionally encrypted) private key. It is the common format in Unix/OpenSSL environments, whereas PFX is more typical on Windows. Because this method accepts either the PEM text or a filename, you can supply credentials straight from a config value or secret store without writing them to disk.

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LOCAL lnSuccess
LOCAL loMailman

lnSuccess = 0

*  Demonstrates the MailMan.SetSslClientCertPem method, which sets the client-side
*  certificate for SSL/TLS connections, loading it from PEM data or from a PEM file.  The
*  1st argument may contain PEM text or a PEM file path; the 2nd is the PEM password.

loMailman = CreateObject('Chilkat.MailMan')

*  Configure the SMTP server connection.
loMailman.SmtpHost = "smtp.example.com"
loMailman.SmtpPort = 465
loMailman.SmtpSsl = 1
loMailman.SmtpUsername = "user@example.com"
loMailman.SmtpPassword = "myPassword"

*  Load the client certificate from a PEM file.
lnSuccess = loMailman.SetSslClientCertPem("qa_data/certs/client.pem","pem_password")
IF (lnSuccess = 0) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    CANCEL
ENDIF

lnSuccess = loMailman.VerifySmtpLogin()
IF (lnSuccess = 0) THEN
    ? loMailman.LastErrorText
    RELEASE loMailman
    CANCEL
ENDIF

? "Connected using a PEM TLS client certificate."

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

RELEASE loMailman