PureBasic

Load a Public Key from a File

Demonstrates the Chilkat PublicKey.LoadFromFile method, which loads a public key from a file. The only argument is the file path. Chilkat examines the file content rather than the extension, accepting binary DER, PEM, Chilkat XML, JWK, and other supported representations.

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 most convenient loader when a key sits in a file of unknown format — it reads the bytes and detects DER, PEM, XML, or JWK without you having to match a format-specific method. Because it keys off content rather than the filename, a mislabeled extension does not trip it up. This is the pragmatic default for applications that accept public keys from users or varied sources.

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IncludeFile "CkPublicKey.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the PublicKey.LoadFromFile method, which loads a public key from a file.  The only
    ;  argument is the file path.  Chilkat examines the file content (not the extension), accepting
    ;  binary DER, PEM, Chilkat 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

    Debug "Loaded a " + CkPublicKey::ckKeyType(pubKey) + " public key."


    CkPublicKey::ckDispose(pubKey)


    ProcedureReturn
EndProcedure