(DataFlex) Get Base64 Public Key from Private Key

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

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

Use ChilkatAx-win32.pkg

Procedure Test
    Variant vBd
    Handle hoBd
    Boolean iSuccess
    Handle hoPrivKey
    Variant vPubKey
    Handle hoPubKey
    String sPubKeyBase64
    String sTemp1
    Boolean bTemp1

    // 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 ComGetPublicKey Of hoPrivKey To vPubKey
    If (IsComObject(vPubKey)) Begin
        Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey
        Set pvComObject Of hoPubKey To vPubKey
    End
    Get ComLastMethodSuccess Of hoPrivKey To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

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

    Send Destroy of hoPubKey


End_Procedure