Set the DKIM Signing Private Key

See more DKIM / DomainKey Examples

Demonstrates the Chilkat Dkim.SetDkimPrivateKey method, which supplies the RSA private key used by DkimSign. The only argument is a PrivateKey object. The source key may be destroyed after this returns, and the configured key can be reused for multiple signatures.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: DKIM proves a message really came from its domain by signing it with a private key that only the domain owner holds; recipients verify with the matching public key published in the domain's DNS. This method loads that private half into the Dkim object once, so a mail server can sign every outgoing message without re-reading the key each time. Because the key is the domain's signing secret, it should be protected like any other private key and never committed to source.

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    success := false

    //  Demonstrates the Dkim.SetDkimPrivateKey method, which supplies the RSA private key used by
    //  DkimSign.  The only argument is a PrivateKey object.

    dkim := chilkat.NewDkim()

    //  Load the RSA private key that corresponds to the public key published in the domain's DNS.
    privKey := chilkat.NewPrivateKey()
    success = privKey.LoadPemFile("qa_data/dkim_private.pem")
    if success == false {
        fmt.Println(privKey.LastErrorText())
        dkim.DisposeDkim()
        privKey.DisposePrivateKey()
        return
    }

    //  Copy the key into the Dkim object.  The PrivateKey object may be destroyed afterward, and the
    //  configured key can be reused for multiple signatures.
    success = dkim.SetDkimPrivateKey(privKey)
    if success == false {
        fmt.Println(dkim.LastErrorText())
        dkim.DisposeDkim()
        privKey.DisposePrivateKey()
        return
    }

    fmt.Println("DKIM private key configured.")

    dkim.DisposeDkim()
    privKey.DisposePrivateKey()