Function createR4Setup

src/security/standard-handler.test.ts:71–114

* Create a complete R4 (AES-128) encryption setup for testing.

(
  userPassword: string,
  ownerPassword: string,
  permissions: Permissions = DEFAULT_PERMISSIONS,
)

 * Create a complete R4 (AES-128) encryption setup for testing.
 */
function createR4Setup(
  userPassword: string,
  ownerPassword: string,
  permissions: Permissions = DEFAULT_PERMISSIONS,
) {
  const userPwd = new TextEncoder().encode(userPassword);
  const ownerPwd = new TextEncoder().encode(ownerPassword);
  const fileId = new Uint8Array(32);

  for (let i = 0; i < 32; i++) {
    fileId[i] = i;
  }

  const keyLength = 16; // 128-bit
  const revision = 4;
  const permissionsRaw = encodePermissions(permissions);

  // Generate encryption dictionary values
  const ownerHash = computeOwnerHash(ownerPwd, userPwd, keyLength, revision);
  const encryptionKey = computeEncryptionKeyR2R4(
    userPwd,
    ownerHash,
    permissionsRaw,
    fileId,
    keyLength,
    revision,
  );
  const userHash = computeUserHash(encryptionKey, fileId, revision);

  const encryptDict: EncryptionDict = {
    filter: "Standard",
    version: 4,
    revision: 4,
    keyLengthBits: 128,
    ownerHash,
    userHash,
    permissions,
    permissionsRaw,
    encryptMetadata: true,
    algorithm: "AES-128",
  };

  return { encryptDict, fileId, encryptionKey, userPwd, ownerPwd };
}

/**
 * Create a complete R6 (AES-256) encryption setup for testing.