(DataFlex) RSA Sign using Base64 Private Key

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string.

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 vPrivKey
    Handle hoPrivKey
    Handle hoSbPem
    Handle hoRsa
    Variant vBd
    Handle hoBd
    String sStrOriginal
    String sTemp1

    Move False To iSuccess

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey
    If (Not(IsComObjectCreated(hoPrivKey))) Begin
        Send CreateComObject of hoPrivKey
    End

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbPem
    If (Not(IsComObjectCreated(hoSbPem))) Begin
        Send CreateComObject of hoSbPem
    End
    Get ComAppendLine Of hoSbPem "-----BEGIN RSA PRIVATE KEY-----" True To iSuccess
    Get ComAppendLine Of hoSbPem "MIIC .... j5A==" True To iSuccess
    Get ComAppendLine Of hoSbPem "-----END RSA PRIVATE KEY-----" True To iSuccess

    Get ComGetAsString Of hoSbPem To sTemp1
    Get ComLoadPem Of hoPrivKey sTemp1 To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPrivKey To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatRsa)) To hoRsa
    If (Not(IsComObjectCreated(hoRsa))) Begin
        Send CreateComObject of hoRsa
    End

    Get pvComObject of hoPrivKey to vPrivKey
    Get ComUsePrivateKey Of hoRsa vPrivKey To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoRsa To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatBinData)) To hoBd
    If (Not(IsComObjectCreated(hoBd))) Begin
        Send CreateComObject of hoBd
    End
    Get ComAppendString Of hoBd "12345678" "utf-8" To iSuccess

    Get pvComObject of hoBd to vBd
    Get ComSignRawBd Of hoRsa vBd To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoRsa To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get the base64 RSA signature.
    Get ComGetEncoded Of hoBd "base64" To sTemp1
    Showln sTemp1

    Get pvComObject of hoBd to vBd
    Get ComVerifyRawBd Of hoRsa vBd To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoRsa To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComGetString Of hoBd "utf-8" To sStrOriginal
    Showln sStrOriginal


End_Procedure