React Native

HMAC SHA-1 Matching FIPS Examples

See more Encryption Examples

Provides an example of computing an HMAC-SHA1 digest to duplicate the FIPS examples at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf React Native

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

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

  const crypt = new Crypt2();

  const strToSign = 'Sample #1';

  // 64-byte key
  const key = '000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f';

  // The expected result:
  // (from Appendix A.1 at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf )
  const expectedResult = '4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a';

  // Here is the code to duplicate the results:
  crypt.hashAlgorithm = 'sha-1';
  crypt.encodingMode = 'hex';
  crypt.macAlgorithm = 'hmac';

  crypt.setMacKeyEncoded(key, 'hex');

  const mac = crypt.macStringENC(strToSign);

  console.log(`Computed: ${mac}`);
  console.log(`Expected: ${expectedResult}`);
}