computeResponse function

Implementation

Map<String, String?> computeResponse(
  String method,
  String path,
  String body,
  String? algorithm,
  String? qop,
  String? opaque,
  String realm,
  String? cnonce,
  String? nonce,
  int nc,
  String username,
  String password,
) {
  var ret = <String, String?>{};

  algorithm ??= 'MD5';
  final ha1 = _computeHA1(realm, algorithm, username, password, nonce, cnonce);

  String ha2;

  if (algorithm.startsWith('MD5')) {
    if (qop == 'auth-int') {
      final bodyHash = md5Hash(body);
      final token2 = '$method:$path:$bodyHash';
      ha2 = md5Hash(token2);
    } else {
      // qop in [null, auth]
      final token2 = '$method:$path';
      ha2 = md5Hash(token2);
    }
  } else {
    if (qop == 'auth-int') {
      final bodyHash = sha256Hash(body);
      final token2 = '$method:$path:$bodyHash';
      ha2 = sha256Hash(token2);
    } else {
      // qop in [null, auth]
      final token2 = '$method:$path';
      ha2 = sha256Hash(token2);
    }
  }

  final nonceCount = _formatNonceCount(nc);
  ret['username'] = username;
  ret['realm'] = realm;
  ret['nonce'] = nonce;
  ret['uri'] = path;
  if (qop != null) {
    ret['qop'] = qop;
  }
  ret['nc'] = nonceCount;
  ret['cnonce'] = cnonce;
  if (opaque != null) {
    ret['opaque'] = opaque;
  }
  ret['algorithm'] = algorithm;

  if (algorithm.startsWith('MD5')) {
    if (qop == null) {
      final token3 = '$ha1:$nonce:$ha2';
      ret['response'] = md5Hash(token3);
    } else if (kQop.contains(qop)) {
      final token3 = '$ha1:$nonce:$nonceCount:$cnonce:$qop:$ha2';
      ret['response'] = md5Hash(token3);
    }
  } else {
    if (qop == null) {
      final token3 = '$ha1:$nonce:$ha2';
      ret['response'] = sha256Hash(token3);
    } else if (kQop.contains(qop)) {
      final token3 = '$ha1:$nonce:$nonceCount:$cnonce:$qop:$ha2';
      ret['response'] = sha256Hash(token3);
    }
  }

  return ret;
}