DataFlex

Load a Public Key from Base64 DER

Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.

Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the BEGIN/END armor.

Chilkat DataFlex Downloads

Download Chilkat for DataFlex

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoPubKey
    String sKeyStr
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
    //  Base64-encoded DER.  The only argument is the Base64 string (whitespace is allowed).

    Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey
    If (Not(IsComObjectCreated(hoPubKey))) Begin
        Send CreateComObject of hoPubKey
    End

    //  The Base64 of the DER-encoded public key.
    Move "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB" To sKeyStr

    Get ComLoadBase64 Of hoPubKey sKeyStr To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPubKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComKeyType Of hoPubKey To sTemp1
    Showln "Loaded a " sTemp1 " public key."


End_Procedure