Export a Public Key as PEM

Demonstrates the Chilkat PublicKey.GetPem method, which returns the public key in PEM format. The only argument selects the underlying DER representation: true prefers the traditional PKCS #1 form (RSA), false uses the SubjectPublicKeyInfo form.

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: PEM is the most portable way to share a public key — the Base64 text block most tooling reads. The boolean picks the encoding: false produces the modern, algorithm-independent PUBLIC KEY (SubjectPublicKeyInfo), which is the usual choice; true produces the older RSA-specific RSA PUBLIC KEY for tools that require it. A public key is not sensitive, so the PEM can be distributed openly.

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    success := false

    //  Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
    //  JWK, and other supported representations.
    pubKey := chilkat.NewPublicKey()
    success = pubKey.LoadFromFile("qa_data/public.pem")
    if success == false {
        fmt.Println(pubKey.LastErrorText())
        pubKey.DisposePublicKey()
        return
    }

    //  Export the public key in PEM format.  The argument selects the underlying DER representation:
    //  true prefers the traditional PKCS #1 form (RSA), false uses the SubjectPublicKeyInfo form.
    preferPkcs1 := false
    pem := pubKey.GetPem(preferPkcs1)
    if pubKey.LastMethodSuccess() == false {
        fmt.Println(pubKey.LastErrorText())
        pubKey.DisposePublicKey()
        return
    }

    fmt.Println(*pem)

    pubKey.DisposePublicKey()