React Native

Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

See more Digital Signatures Examples

_LANGUAGE_ example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

React Native

import { Crypt2, FileAccess } from '@chilkat/react-native'

function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  const fac = new FileAccess();
  const p7mBytes = fac.readEntireFile('testData/p7m/fattura_signature.p7m');
  if (!fac.lastMethodSuccess) {
    console.log(fac.lastErrorText);
    return;
  }

  const crypt = new Crypt2();

  let originalXml: string;
  try {
    originalXml = crypt.opaqueVerifyString(p7mBytes);
  } catch {
    console.log(fac.lastErrorText);
    return;
  }

  console.log('Original XML:');
  console.log(originalXml);

  console.log('Success!');
}