(DataFlex) Get Base64 Public Key from Private Key

Demonstrates how to get the public key in base64 format from a private key.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vBd
    Handle hoBd
    Handle hoPrivKey
    Variant vPubKey
    Handle hoPubKey
    String sPubKeyBase64
    String sTemp1

    Move False To iSuccess

    // Load a private key from base64.
    Get Create (RefClass(cComChilkatBinData)) To hoBd
    If (Not(IsComObjectCreated(hoBd))) Begin
        Send CreateComObject of hoBd
    End
    Get ComAppendEncoded Of hoBd "MHQCA....n0Q==" "base64" To iSuccess

    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End
    Get pvComObject of hoBd to vBd
    Get ComLoadAnyFormat Of hoPrivKey vBd "" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey
    If (Not(IsComObjectCreated(hoPubKey))) Begin
        Send CreateComObject of hoPubKey
    End
    Get pvComObject of hoPubKey to vPubKey
    Get ComToPublicKey Of hoPrivKey vPubKey To iSuccess

    Get ComGetEncoded Of hoPubKey True "base64" To sPubKeyBase64
    Showln sPubKeyBase64


End_Procedure