v0.8.0 - The one with better challenges

Packages:

• @simplewebauthn/browser@0.8.0
• @simplewebauthn/server@0.8.0
• @simplewebauthn/typescript-types@0.8.0

Changes:

• [server] The challenge parameter of generateAttestationOptions() and generateAssertionOptions() is now optional.
  • When undefined the library will generate a random challenge. This value will be base64url-encoded in preparation for transit to the front end.
  • When defined the value will be directly encoded to base64url in preparation for transit to the front end.
• [browser] startAttestation() and startAssertion() now convert the base64url-encoded options.challenge to a buffer before passing it to the authenticator.

Breaking Changes

• [server] verifyAttestationResponse() and verifyAssertionResponse() now require the base64url-encoded challenge to be passed in as expectedChallenge:

Before:

const challenge = 'someChallenge';

const opts = generateAttestationOptions({
  ...atteOpts,
  challenge,
});

const verification = verifyAttestationResponse({
  ...atteResp,
  // Raw original value
  expectedChallenge: challenge,
});

After:

const challenge = 'someChallenge';

const opts = generateAttestationOptions({
  ...atteOpts,
  // This is now optional
  challenge,
});

const verification = verifyAttestationResponse({
  ...atteResp,
  // Now expected to be the base64url-encoded `challenge` returned
  // by `generateAttestationOptions()`
  expectedChallenge: opts.challenge,
});