PureBasic

Export a Public Key as XML

Demonstrates the Chilkat PublicKey.GetXml method, which returns the public key in Chilkat XML format. It takes no arguments; the exact representation (for example an RSAPublicKey element) depends on the key type.

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: The XML key format comes from the .NET/XML-DSIG world; exporting to it lets you hand a public key to .NET code or a system built around XML signatures. It is the inverse of LoadXml-style loading. Because a public key is not secret, this XML can be shared freely.

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IncludeFile "CkPublicKey.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
    ;  JWK, and other supported representations.
    pubKey.i = CkPublicKey::ckCreate()
    If pubKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPublicKey::ckLoadFromFile(pubKey,"qa_data/public.pem")
    If success = 0
        Debug CkPublicKey::ckLastErrorText(pubKey)
        CkPublicKey::ckDispose(pubKey)
        ProcedureReturn
    EndIf

    ;  Export the public key in Chilkat XML format.  The representation depends on the key type (for
    ;  example an RSAPublicKey element for RSA).
    xml.s = CkPublicKey::ckGetXml(pubKey)
    If CkPublicKey::ckLastMethodSuccess(pubKey) = 0
        Debug CkPublicKey::ckLastErrorText(pubKey)
        CkPublicKey::ckDispose(pubKey)
        ProcedureReturn
    EndIf

    Debug xml


    CkPublicKey::ckDispose(pubKey)


    ProcedureReturn
EndProcedure