Sha 256 code encode

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Wed Jan 20 2021 07:27:23 GMT+0000 (Coordinated Universal Time)

Saved by @alexSiera #javascript #react.js

// SHA

function sha256(plain: any) {
  // returns promise ArrayBuffer
  const encoder = new TextEncoder();
  const data = encoder.encode(plain);
  return window.crypto.subtle.digest('SHA-256', data);
}

function base64urlencode(a: any) {
  // Convert the ArrayBuffer to string using Uint8 array.
  // btoa takes chars from 0-255 and base64 encodes.
  // Then convert the base64 encoded to base64url encoded.
  // (replace + with -, replace / with _, trim trailing =)
  // @ts-ignore
  return btoa(String.fromCharCode.apply(null, new Uint8Array(a)))
    .replace(/\+/g, '-')
    .replace(/\//g, '_')
    .replace(/=+$/, '');
}

export async function pkceChallengeFromVerifier(v: any) {
  const hashed = await sha256(v);
  return base64urlencode(hashed);
}

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Sha 256 code encode

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