React Native

Demonstrates HMAC SHA256

See more Encryption Examples

Demonstrates HMAC-SHA256. Also demonstrates HMAC-SHA1 and HMAC-MD5. React Native

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

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

  // Demonstrates how to reproduce the following results found at
  // https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

  // HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
  // HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
  // HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

  const crypt = new Crypt2();

  crypt.macAlgorithm = 'hmac';
  crypt.encodingMode = 'hex';
  crypt.setMacKeyString('key');
  const sData = 'The quick brown fox jumps over the lazy dog';

  crypt.hashAlgorithm = 'SHA-256';
  console.log(`HMAC_SHA256: ${crypt.macStringENC(sData)}`);

  crypt.hashAlgorithm = 'MD5';
  console.log(`HMAC_MD5: ${crypt.macStringENC(sData)}`);

  crypt.hashAlgorithm = 'SHA-1';
  console.log(`HMAC_SHA1: ${crypt.macStringENC(sData)}`);

  // The output is the same (ignore case)
  // HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
  // HMAC_MD5: 80070713463E7749B90C2DC24911E275
  // HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9
}