Visual Basic 6.0

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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Visual Basic 6.0

Dim success As Long
success = 0

'  Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
'  JWK, and other supported representations.
Dim pubKey As New PublicKey
success = pubKey.LoadFromFile("qa_data/public.pem")
If (success = 0) Then
    Debug.Print pubKey.LastErrorText
    Exit Sub
End If

'  Export the public key in Chilkat XML format.  The representation depends on the key type (for
'  example an RSAPublicKey element for RSA).
Dim xml As String
xml = pubKey.GetXml()
If (pubKey.LastMethodSuccess = 0) Then
    Debug.Print pubKey.LastErrorText
    Exit Sub
End If

Debug.Print xml