def test_testzip_missing_hash(wheel_path):
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, world!")\n'))
        zf.writestr('test-1.0.dist-info/RECORD', '')

    with WheelFile(wheel_path) as wf:
        exc = pytest.raises(WheelError, wf.testzip)
        exc.match(native("^No hash found for file 'hello/héllö.py'$"))

def test_testzip_bad_hash(wheel_path):
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, w0rld!")\n'))
        zf.writestr(
            'test-1.0.dist-info/RECORD',
            as_bytes('hello/héllö.py,sha256=bv-QV3RciQC2v3zL8Uvhd_arp40J5A9xmyubN34OVwo,25'))

    with WheelFile(wheel_path) as wf:
        exc = pytest.raises(WheelError, wf.testzip)
        exc.match(native("^Hash mismatch for file 'hello/héllö.py'$"))

def test_write_str(wheel_path):
    with WheelFile(wheel_path, 'w') as wf:
        wf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, world!")\n'))

    with ZipFile(wheel_path, 'r') as zf:
        infolist = zf.infolist()
        assert len(infolist) == 2
        assert infolist[0].filename == native('hello/héllö.py')
        assert infolist[0].file_size == 25
        assert infolist[1].filename == 'test-1.0.dist-info/RECORD'

        record = zf.read('test-1.0.dist-info/RECORD')
        assert record == as_bytes(
            'hello/héllö.py,sha256=bv-QV3RciQC2v3zL8Uvhd_arp40J5A9xmyubN34OVwo,25\n'
            'test-1.0.dist-info/RECORD,,\n')

    def write_record(self, bdist_dir, distinfo_dir):
        from wheel.util import urlsafe_b64encode

        record_path = os.path.join(distinfo_dir, 'RECORD')
        record_relpath = os.path.relpath(record_path, bdist_dir)

        def walk():
            for dir, dirs, files in os.walk(bdist_dir):
                dirs.sort()
                for f in sorted(files):
                    yield os.path.join(dir, f)

        def skip(path):
            """Wheel hashes every possible file."""
            return (path == record_relpath)

        with open_for_csv(record_path, 'w+') as record_file:
            writer = csv.writer(record_file)
            for path in walk():
                relpath = os.path.relpath(path, bdist_dir)
                if skip(relpath):
                    hash = ''
                    size = ''
                else:
                    with open(path, 'rb') as f:
                        data = f.read()
                    digest = hashlib.sha256(data).digest()
                    hash = 'sha256=' + native(urlsafe_b64encode(digest))
                    size = len(data)
                record_path = os.path.relpath(
                    path, bdist_dir).replace(os.path.sep, '/')
                writer.writerow((record_path, hash, size))

 def save(self):
     # Try not to call this a very long time after load()
     path = save_config_path('wheel')
     conf = os.path.join(native(path), self.CONFIG_NAME)
     with open(conf, 'w+') as out:
         json.dump(self.data, out, indent=2)
     return self

    def open(self, name_or_info, mode="r", pwd=None):
        def _update_crc(newdata, eof=None):
            if eof is None:
                eof = ef._eof
                update_crc_orig(newdata)
            else:  # Python 2
                update_crc_orig(newdata, eof)

            running_hash.update(newdata)
            if eof and running_hash.digest() != expected_hash:
                raise WheelError("Hash mismatch for file '{}'".format(native(ef_name)))

        ef = super(WheelFile, self).open(name_or_info, mode, pwd)
        ef_name = as_unicode(name_or_info.filename if isinstance(name_or_info, ZipInfo)
                             else name_or_info)
        if mode == 'r' and not ef_name.endswith('/'):
            if ef_name not in self._file_hashes:
                raise WheelError("No hash found for file '{}'".format(native(ef_name)))

            algorithm, expected_hash = self._file_hashes[ef_name]
            if expected_hash is not None:
                # Monkey patch the _update_crc method to also check for the hash from RECORD
                running_hash = hashlib.new(algorithm)
                update_crc_orig, ef._update_crc = ef._update_crc, _update_crc

        return ef

def test_testzip(wheel_path, algorithm, digest):
    hash_string = '{}={}'.format(algorithm, digest)
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, world!")\n'))
        zf.writestr('test-1.0.dist-info/RECORD',
                    as_bytes('hello/héllö.py,{},25'.format(hash_string)))

    with WheelFile(wheel_path) as wf:
        wf.testzip()

def test_weak_hash_algorithm(wheel_path, algorithm, digest):
    hash_string = '{}={}'.format(algorithm, digest)
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, w0rld!")\n'))
        zf.writestr('test-1.0.dist-info/RECORD',
                    as_bytes('hello/héllö.py,{},25'.format(hash_string)))

    exc = pytest.raises(WheelError, WheelFile, wheel_path)
    exc.match(r"^Weak hash algorithm \({}\) is not permitted by PEP 427$".format(algorithm))

def test_unsupported_hash_algorithm(wheel_path):
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, w0rld!")\n'))
        zf.writestr(
            'test-1.0.dist-info/RECORD',
            as_bytes('hello/héllö.py,sha000=bv-QV3RciQC2v3zL8Uvhd_arp40J5A9xmyubN34OVwo,25'))

    exc = pytest.raises(WheelError, WheelFile, wheel_path)
    exc.match("^Unsupported hash algorithm: sha000$")

 def writestr(self, zinfo_or_arcname, bytes, compress_type=None):
     super(WheelFile, self).writestr(zinfo_or_arcname, bytes, compress_type)
     fname = (zinfo_or_arcname.filename if isinstance(zinfo_or_arcname, ZipInfo)
              else zinfo_or_arcname)
     logger.info("adding '%s'", fname)
     if fname != self.record_path:
         hash_ = self._default_algorithm(bytes)
         self._file_hashes[fname] = hash_.name, native(urlsafe_b64encode(hash_.digest()))
         self._file_sizes[fname] = len(bytes)

    def _record_digest(self, data):
        '''Returns a three tuple of hash, size and digest.'''

        from wheel.util import urlsafe_b64encode

        digest = hashlib.sha256(data).digest()
        hash_text = 'sha256=' + native(urlsafe_b64encode(digest))
        size = len(data)
        return (hash_text, size, digest)

    def verify(self, zipfile=None):
        """Configure the VerifyingZipFile `zipfile` by verifying its signature 
        and setting expected hashes for every hash in RECORD.
        Caller must complete the verification process by completely reading 
        every file in the archive (e.g. with extractall)."""
        sig = None
        if zipfile is None:
            zipfile = self.zipfile
        zipfile.strict = True

        record_name = '/'.join((self.distinfo_name, 'RECORD'))
        sig_name = '/'.join((self.distinfo_name, 'RECORD.jws'))
        # tolerate s/mime signatures:
        smime_sig_name = '/'.join((self.distinfo_name, 'RECORD.p7s'))
        zipfile.set_expected_hash(record_name, None)
        zipfile.set_expected_hash(sig_name, None)
        zipfile.set_expected_hash(smime_sig_name, None)
        record = zipfile.read(record_name)

        record_digest = urlsafe_b64encode(hashlib.sha256(record).digest())
        try:
            sig = from_json(native(zipfile.read(sig_name)))
        except KeyError:  # no signature
            pass
        if sig:
            headers, payload = signatures.verify(sig)
            if payload['hash'] != "sha256=" + native(record_digest):
                msg = "RECORD.sig claimed RECORD hash {0} != computed hash {1}."
                raise BadWheelFile(msg.format(payload['hash'],
                                              native(record_digest)))

        reader = csv.reader((native(r) for r in record.splitlines()))

        for row in reader:
            filename = row[0]
            hash = row[1]
            if not hash:
                if filename not in (record_name, sig_name):
                    sys.stderr.write("%s has no hash!\n" % filename)
                continue
            algo, data = row[1].split('=', 1)
            assert algo == "sha256", "Unsupported hash algorithm"
            zipfile.set_expected_hash(filename, urlsafe_b64decode(binary(data)))

        def _update_crc(newdata, eof=None):
            if eof is None:
                eof = ef._eof
                update_crc_orig(newdata)
            else:  # Python 2
                update_crc_orig(newdata, eof)

            running_hash.update(newdata)
            if eof and running_hash.digest() != expected_hash:
                raise WheelError("Hash mismatch for file '{}'".format(native(ef_name)))

    def iter_files(self):
        record_names = glob.glob(os.path.join(self.path, '*.dist-info/RECORD'))
        if len(record_names) != 1:
            raise ValueError("Should be exactly one `*.dist_info` directory")

        with open(record_names[0]) as f:
            record = f.read()
        reader = csv.reader((native(r) for r in record.splitlines()))
        for row in reader:
            filename = row[0]
            yield filename

    def close(self):
        # Write RECORD
        if self.fp is not None and self.mode == 'w' and self._file_hashes:
            content = '\n'.join('{},{}={},{}'.format(fname, algorithm, hash_,
                                                     self._file_sizes[fname])
                                for fname, (algorithm, hash_) in self._file_hashes.items())
            content += '\n{},,\n'.format(self.record_path)
            zinfo = ZipInfo(native(self.record_path), date_time=get_zipinfo_datetime())
            zinfo.compress_type = ZIP_DEFLATED
            self.writestr(zinfo, as_bytes(content))

        super(WheelFile, self).close()

 def load(self):
     # XXX JSON is not a great database
     for path in load_config_paths('wheel'):
         conf = os.path.join(native(path), self.CONFIG_NAME)
         if os.path.exists(conf):
             with open(conf, 'r') as infile:
                 self.data = json.load(infile)
                 for x in ('signers', 'verifiers'):
                     if not x in self.data:
                         self.data[x] = []
                 if 'schema' not in self.data:
                     self.data['schema'] = self.SCHEMA
                 elif self.data['schema'] != self.SCHEMA:
                     raise ValueError(
                         "Bad wheel.json version {0}, expected {1}".format(
                             self.data['schema'], self.SCHEMA))
             break
     return self

def rewrite_record(bdist_dir):
    """ Rewrite RECORD file with hashes for all files in `wheel_sdir`

    Copied from :method:`wheel.bdist_wheel.bdist_wheel.write_record`

    Will also unsign wheel

    Parameters
    ----------
    bdist_dir : str
        Path of unpacked wheel file
    """
    info_dir = _dist_info_dir(bdist_dir)
    record_path = pjoin(info_dir, 'RECORD')
    record_relpath = relpath(record_path, bdist_dir)
    # Unsign wheel - because we're invalidating the record hash
    sig_path = pjoin(info_dir, 'RECORD.jws')
    if exists(sig_path):
        os.unlink(sig_path)

    def walk():
        for dir, dirs, files in os.walk(bdist_dir):
            for f in files:
                yield pjoin(dir, f)

    def skip(path):
        """Wheel hashes every possible file."""
        return (path == record_relpath)

    with open_for_csv(record_path, 'w+') as record_file:
        writer = csv.writer(record_file)
        for path in walk():
            relative_path = relpath(path, bdist_dir)
            if skip(relative_path):
                hash = ''
                size = ''
            else:
                with open(path, 'rb') as f:
                    data = f.read()
                digest = hashlib.sha256(data).digest()
                hash = 'sha256=' + native(urlsafe_b64encode(digest))
                size = len(data)
            record_path = relpath(path, bdist_dir).replace(psep, '/')
            writer.writerow((record_path, hash, size))

    def close(self):
        # Write RECORD
        if self.fp is not None and self.mode == 'w' and self._file_hashes:
            data = StringIO()
            writer = csv.writer(data, delimiter=',', quotechar='"', lineterminator='\n')
            writer.writerows((
                (
                    fname,
                    algorithm + "=" + hash_,
                    self._file_sizes[fname]
                )
                for fname, (algorithm, hash_) in self._file_hashes.items()
            ))
            writer.writerow((format(self.record_path), "", ""))
            zinfo = ZipInfo(native(self.record_path), date_time=get_zipinfo_datetime())
            zinfo.compress_type = ZIP_DEFLATED
            zinfo.external_attr = 0o664 << 16
            self.writestr(zinfo, as_bytes(data.getvalue()))

        ZipFile.close(self)

def verify_wheel(wheelfile):
    wf = WheelFile(wheelfile)
    sig_name = wf.distinfo_name + '/RECORD.jws'
    try:
        sig = json.loads(native(wf.zipfile.open(sig_name).read()))
    except KeyError:
        raise WheelValidationFailed("This wheel is not signed")
    verified = signatures.verify(sig)

    try:
        vk = verified[0][0]['jwk']['vk']
    except (KeyError, IndexError, ValueError):
        raise WheelValidationFailed("Invalid signature")

    if vk != settings.WHEEL_USER:
        raise WheelValidationFailed("Wheel validation failed")

    kr = keyring.get_keyring()
    password = kr.get_password("wheel", settings.WHEEL_USER)
    if password != settings.WHEEL_PASSWORD:
        raise WheelValidationFailed("Wheel validation failed")

def test_missing_record(wheel_path):
    with ZipFile(wheel_path, 'w') as zf:
        zf.writestr(native('hello/héllö.py'), as_bytes('print("Héllö, w0rld!")\n'))

    exc = pytest.raises(WheelError, WheelFile, wheel_path)
    exc.match("^Missing test-1.0.dist-info/RECORD file$")