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eVisor - implementation of generation of true copy in the role of documents with electronic signature and proof of electronic signature.

  • Start date Production:

    01/12/2010

    Functional description

    El eVisor es una aplicación web que permite la generación de informes y justificantes de firma electrónica en formato PDF u ODF que cuando los firma con sello electrónico o les añade un CSV se convierten en copias auténticas. Tanto la petición como la respueta con el informe se realizan mediante servicios web. El eVisor utiliza plantillas XSL para la generación del informe de tal forma que cada aplicación puede disponer de un formato o apariencia específico.

    Technical Description

     

    Generation process Report

    The application eVisor allows, from electronic signatures, generate reports of signature PDF or PDF which include information associated with the process of signature of the user, so this report by signing may contain information of the signatory, document signed, seal of time, etc.

    The generation of these reports is done through the application of templates recorded in the system in which the configured applications in which format presents information reported.

    Below we will describe the process of generating report in formats supported since to carry out the design of a template is necessary to understand the elements involved in the process.

     

    Generation process PDF Report

    La generación de informe PDF está basado en la utilización de XSL-FO (eXtensible Stylesheet Language Formatting Objects), XSL-FO es una recomendación W3C que mediante XML especifica cómo se van a formatear unos datos para presentarlos en pantalla, papel u otros medios (puede consultarse información sobre las especificaciones XSL-FO en http://www.w3.org/TR/xsl11/).

     

    The process of generation is as follows:

    • 1. An external application requests through the request WS generating a report by signing the petition includes the electronic signature, signed data and additional information for the generation of the report signature.
    • 2. El sistema solicita la validación de la firma electrónica a la plataforma de validación y firma @firma.
    • 3. Out of the result of validating @firma and additional parameters included in the petition the system builds a XML previously defined.
    • 4. The application will have previously recorded in the system a template XSLT allowing a document XSL-FO from XML created in the previous step.
    • 5. Una vez obtenido el documento XSL-FO podemos obtener el documento PDF mediante el procesador XSL-FO “Apache-FOP” ( http://xmlgraphics.apache.org/fop/ )

    If the format of the original document is supported by the system (see Annex A.2), we can include it in the final report by one of the following methods:

    • Embedding the original document in the report File. Within the XSLT representing the template PDF you can specify which pages of the document signed will be included in the report after the transformation XSL-FO.
    • Including images of the pages of the original document . The XML data used for the transformation XSLT included images of the pages of the original document so that the designer of the template can configure the final report including these images in the file XSL-FO.
    • Concatenando to report the original document . Once made the transformation XSL-FO can be CONCATENATE the PDF caused with the original document.

    Además, los informes PDF permiten anexar datos del proceso de firma electrónica, como puede ser el documento original, certificados firmantes, firma electrónica, etc.

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