React Native

SHA256 Hash the Bytes Represented in a Hex String

Demonstrates how to compute the SHA256 hash of the bytes represented by a hexidecimal encoded string, and return the hash bytes as an hex encoded string. React Native

import { BinData, 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.

  // We wish to compute the SHA256 hash of the bytes 0x6C 0xF8 0xEA 0x51 0xE4 0xE0 0xF5 0x99 0xCF ...
  const src = '6CF8EA51E4E0F599CF03EC8D58C3DCBC9C889A77FB2816B40DE25C2EC54E98A67EA517B';

  const bd = new BinData();
  bd.appendEncoded(src, 'hex');

  // The bd now contains the bytes 0x6C 0xF8 0xEA 0x51 0xE4 0xE0 0xF5 0x99 0xCF ...

  const crypt = new Crypt2();
  crypt.hashAlgorithm = 'sha256';
  crypt.encodingMode = 'hex';

  // Hash the bytes contained in bd, and return the 32-byte SHA256 hash as a hexidecimal encoded string.
  const result = crypt.hashBdENC(bd);
  console.log(result);
}