old_contents: import os
  import mock
  import base64
  import pytest
  
  from keybar.utils.crypto import (
      derive_encryption_key, verify_encryption_key,
      encrypt, decrypt)
  
  
  @pytest.mark.parametrize('salt,password,expected', (
      (b'predictable salt', '漢語中文',
          b's RU\xb4\x12S\xa7\x83\x1d\xa5\xc23U:`O\x14R\x92\xb30x\xbe{\xac\x1b\xb93\xa5\x8d\xae'),  # noqa
      (b'predictable salt', 'simple string',
          b'Bj=\x81\xb0\x8b\x95\t\xf4\x8f\x8c\x139L\xf9\xc6^8=\x0c\x1d\xa5\xde\xd0\x9f,~\x0b\xde\x05R\xb6'),  # noqa
      (b'predictable salt', b'simple bytes string',
          b'\x7f\xea\xf9\x9b\xa0j\x96jiy\x14~"\xabz \xe5\xe1\xa7IB\xbe<l\xc50)!\xca[Y1'),  # noqa
      (b'predictable salt', '½³@ſđæ',
          b'iS\x14F\xa21\x0bM\xe5\x0fU3X\xcd\xef|&\xa1\xd6\x8f\xac<\xab\xd7\x8d\x12s\xcf\xe8\xea\x00\xf5'),  # noqa
  ))
  def test_simple_encryption_key_derive(salt, password, expected):
      assert derive_encryption_key(salt, password) == expected
  
  
  @pytest.mark.parametrize('salt,password,message', (
      (os.urandom(16), b'my super secure password', '漢語中文'),
      (os.urandom(16), 'my super secure password', '@y1ŋ@¨³¼½¬]@'),
      (os.urandom(16), 'æ¶←@³¬\~]²↓³¼¬ŧ@', 'this is my secure message'),
      (os.urandom(16), '漢語中文', 'this is my secure message'),
      pytest.mark.xfail((os.urandom(16), '漢語中文', b'this is my secure message')),
  ))
  def test_encrypt_decrypt_cycle(salt, password, message):
      encrypted = encrypt(message, salt, password)
  
      decrypted = decrypt(encrypted, salt, password)
      assert decrypted == message
  
new_contents: import os
  import mock
  import base64
  import pytest
  
  from keybar.utils.crypto import (
      derive_encryption_key, verify_encryption_key,
      encrypt, decrypt)
  
  
  @pytest.mark.parametrize('salt,password,expected', (
      (b'predictable salt', '漢語中文',
          b's RU\xb4\x12S\xa7\x83\x1d\xa5\xc23U:`O\x14R\x92\xb30x\xbe{\xac\x1b\xb93\xa5\x8d\xae'),  # noqa
      (b'predictable salt', 'simple string',
          b'Bj=\x81\xb0\x8b\x95\t\xf4\x8f\x8c\x139L\xf9\xc6^8=\x0c\x1d\xa5\xde\xd0\x9f,~\x0b\xde\x05R\xb6'),  # noqa
      (b'predictable salt', b'simple bytes string',
          b'\x7f\xea\xf9\x9b\xa0j\x96jiy\x14~"\xabz \xe5\xe1\xa7IB\xbe<l\xc50)!\xca[Y1'),  # noqa
      (b'predictable salt', '½³@ſđæ',
          b'iS\x14F\xa21\x0bM\xe5\x0fU3X\xcd\xef|&\xa1\xd6\x8f\xac<\xab\xd7\x8d\x12s\xcf\xe8\xea\x00\xf5'),  # noqa
  ))
  def test_simple_encryption_key_derive_and_verify(salt, password, expected):
      assert derive_encryption_key(salt, password) == expected
      assert verify_encryption_key(salt, password, expected)
  
  
  @pytest.mark.parametrize('salt,password,message', (
      (os.urandom(16), b'my super secure password', '漢語中文'),
      (os.urandom(16), 'my super secure password', '@y1ŋ@¨³¼½¬]@'),
      (os.urandom(16), 'æ¶←@³¬\~]²↓³¼¬ŧ@', 'this is my secure message'),
      (os.urandom(16), '漢語中文', 'this is my secure message'),
      pytest.mark.xfail((os.urandom(16), '漢語中文', b'this is my secure message')),
  ))
  def test_encrypt_decrypt_cycle(salt, password, message):
      encrypted = encrypt(message, salt, password)
  
      decrypted = decrypt(encrypted, salt, password)
      assert decrypted == message
  
subject: Add test for verify_encryption_key