Python base64.urlsafe_b64decode方法代码示例

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def loads(self, bstruct):
        """
        Given a ``bstruct`` (a bytestring), verify the signature and then
        deserialize and return the deserialized value.

        A ``ValueError`` will be raised if the signature fails to validate.
        """
        try:
            b64padding = b'=' * (-len(bstruct) % 4)
            fstruct = base64.urlsafe_b64decode(bytes_(bstruct) + b64padding)
        except (binascii.Error, TypeError) as e:
            raise ValueError('Badly formed base64 data: %s' % e)

        cstruct = fstruct[self.digest_size:]
        expected_sig = fstruct[:self.digest_size]

        sig = hmac.new(
            self.salted_secret, bytes_(cstruct), self.digestmod).digest()

        if strings_differ(sig, expected_sig):
            raise ValueError('Invalid signature')

        return self.serializer.loads(cstruct) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def test_returns_http2_settings(self, frame_factory):
        """
        Calling initiate_upgrade_connection returns a base64url encoded
        Settings frame with the settings used by the connection.
        """
        conn = h2.connection.H2Connection()
        data = conn.initiate_upgrade_connection()

        # The base64 encoding must not be padded.
        assert not data.endswith(b'=')

        # However, SETTINGS frames should never need to be padded.
        decoded_frame = base64.urlsafe_b64decode(data)
        expected_frame = frame_factory.build_settings_frame(
            settings=conn.local_settings
        )
        assert decoded_frame == expected_frame.serialize_body() 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def is_valid_user_id(b64_content: str) -> bool:
        """
        Check potential token to see if it contains a valid Discord user ID.

        See: https://discordapp.com/developers/docs/reference#snowflakes
        """
        b64_content = utils.pad_base64(b64_content)

        try:
            decoded_bytes = base64.urlsafe_b64decode(b64_content)
            string = decoded_bytes.decode('utf-8')

            # isdigit on its own would match a lot of other Unicode characters, hence the isascii.
            return string.isascii() and string.isdigit()
        except (binascii.Error, ValueError):
            return False 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def is_valid_timestamp(b64_content: str) -> bool:
        """
        Return True if `b64_content` decodes to a valid timestamp.

        If the timestamp is greater than the Discord epoch, it's probably valid.
        See: https://i.imgur.com/7WdehGn.png
        """
        b64_content = utils.pad_base64(b64_content)

        try:
            decoded_bytes = base64.urlsafe_b64decode(b64_content)
            timestamp = int.from_bytes(decoded_bytes, byteorder="big")
        except (binascii.Error, ValueError) as e:
            log.debug(f"Failed to decode token timestamp '{b64_content}': {e}")
            return False

        # Seems like newer tokens don't need the epoch added, but add anyway since an upper bound
        # is not checked.
        if timestamp + TOKEN_EPOCH >= DISCORD_EPOCH:
            return True
        else:
            log.debug(f"Invalid token timestamp '{b64_content}': smaller than Discord epoch")
            return False 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def b64d(b):
        """Decode some base64-encoded bytes.

        Raises Exception if the string contains invalid characters or padding.

        :param b: bytes
        """

        cb = b.rstrip(b"=")  # shouldn't but there you are

        # Python's base64 functions ignore invalid characters, so we need to
        # check for them explicitly.
        b64_re = re.compile(b"^[A-Za-z0-9_-]*$")
        if not b64_re.match(cb):
            raise Exception(cb, "base64-encoded data contains illegal characters")

        if cb == b:
            b = JWT.add_padding(b)

        return base64.urlsafe_b64decode(b) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def decode_field(self, field, value):
    """Decode a JSON value to a python value.

    Args:
      field: A ProtoRPC field instance.
      value: A serialized JSON value.

    Returns:
      A Python value compatible with field.
    """
    # Override BytesField handling.  Client libraries typically use a url-safe
    # encoding.  b64decode doesn't handle these gracefully.  urlsafe_b64decode
    # handles both cases safely.  Also add padding if the padding is incorrect.
    if isinstance(field, messages.BytesField):
      try:
        # Need to call str(value) because ProtoRPC likes to pass values
        # as unicode, and urlsafe_b64decode can only handle bytes.
        padded_value = self.__pad_value(str(value), 4, '=')
        return base64.urlsafe_b64decode(padded_value)
      except (TypeError, UnicodeEncodeError), err:
        raise messages.DecodeError('Base64 decoding error: %s' % err) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def _decode_uuid_line(line, passwd):
    decoded = base64.urlsafe_b64decode(line)
    if IS_WIN:
        key = scrypt.hash(passwd, socket.gethostname())
        key = base64.urlsafe_b64encode(key[:32])
        try:
            f = Fernet(key, backend=crypto_backend)
            maybe_decrypted = f.decrypt(key)
        except Exception:
            return None
    else:
        try:
            maybe_decrypted = scrypt.decrypt(decoded, passwd, maxtime=0.1)
        except scrypt.error:
            return None
    match = re.findall("userid\:(.+)\:uuid\:(.+)", maybe_decrypted)
    if match:
        return match[0] 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def test_b64decode_invalid_chars(self):
        # issue 1466065: Test some invalid characters.
        tests = ((b'%3d==', b'\xdd'),
                 (b'$3d==', b'\xdd'),
                 (b'[==', b''),
                 (b'YW]3=', b'am'),
                 (b'3{d==', b'\xdd'),
                 (b'3d}==', b'\xdd'),
                 (b'@@', b''),
                 (b'!', b''),
                 (b'YWJj\nYWI=', b'abcab'))
        for bstr, res in tests:
            self.assertEqual(base64.b64decode(bstr), res)
            self.assertEqual(base64.standard_b64decode(bstr), res)
            self.assertEqual(base64.urlsafe_b64decode(bstr), res)

        # Normal alphabet characters not discarded when alternative given
        res = b'\xFB\xEF\xBE\xFF\xFF\xFF'
        self.assertEqual(base64.b64decode(b'++[[//]]', b'[]'), res)
        self.assertEqual(base64.urlsafe_b64decode(b'++--//__'), res) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def sign_hmac(secret, payload):
    """Returns a base64-encoded HMAC-SHA1 signature of a given string.

    :param secret: The key used for the signature, base64 encoded.
    :type secret: string

    :param payload: The payload to sign.
    :type payload: string

    :rtype: string
    """
    payload = payload.encode('ascii', 'strict')
    secret = secret.encode('ascii', 'strict')
    sig = hmac.new(base64.urlsafe_b64decode(secret), payload, hashlib.sha1)
    out = base64.urlsafe_b64encode(sig.digest())
    return out.decode('utf-8') 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def b64url_decode(s):
    return base64.urlsafe_b64decode(b64_restore_padding(s)) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def extract_real_url_from_embedded_url(embedded_url):
    """
    将 embed_real_url_to_embedded_url() 编码后的url转换为原来的带有参数的url
    `cdn_redirect_encode_query_str_into_url`设置依赖于本函数, 详细说明请看配置文件中这个参数的部分

    eg: https://cdn.domain.com/a.php_zm24_.cT1zb21ldGhpbmc=._zm24_.css
        ---> https://foo.com/a.php?q=something (assume it returns an css) (base64 only)
    eg2: https://cdn.domain.com/a/b/_zm24_.bG92ZT1saXZl._zm24_.jpg
        ---> https://foo.com/a/b/?love=live (assume it returns an jpg) (base64 only)
    eg3: https://cdn.domain.com/a/b/_zm24z_.[some long long base64 encoded string]._zm24_.jpg
        ---> https://foo.com/a/b/?love=live[and a long long query string] (assume it returns an jpg) (gzip + base64)
    eg4:https://cdn.domain.com/a  (no change)
        ---> (no query string): https://foo.com/a (assume it returns an png) (no change)
    :param embedded_url: 可能被编码的URL
    :return: 如果传入的是编码后的URL, 则返回解码后的URL, 否则返回None
    :type embedded_url: str
    :rtype: Union[str, None]
    """
    if '._' + cdn_url_query_encode_salt + '_.' not in embedded_url[-15:]:  # check url mark
        return None
    m = regex_extract_base64_from_embedded_url.search(embedded_url)
    b64 = get_group('b64', m)

    # 'https://cdn.domain.com/a.php_zm24_.cT1zb21ldGhpbmc=._zm24_.css'
    # real_request_url_no_query ---> 'https://cdn.domain.com/a.php'
    real_request_url_no_query = embedded_url[:m.span()[0]]

    query_string_byte = base64.urlsafe_b64decode(b64)
    is_gzipped = get_group('gzip', m)
    if is_gzipped:
        query_string_byte = zlib.decompress(query_string_byte)
    query_string = query_string_byte.decode(encoding='utf-8')

    result = urljoin(real_request_url_no_query, '?' + query_string)
    # dbgprint('extract:', embedded_url, 'to', result)
    return result 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def load_friends(self):
        my_friends = self.requester.get_friends(self.username)
        for user in my_friends["friends"]:
            if user['username'] != self.username:
                friend_frame = ttk.Frame(self.canvas_frame)

                friend_avatar_path = os.path.join(friend_avatars_dir, f"{user['username']}.png")

                if user["avatar"]:
                    with open(friend_avatar_path, 'wb') as friend_avatar:
                        img = base64.urlsafe_b64decode(user['avatar'])
                        friend_avatar.write(img)
                else:
                    friend_avatar_path = default_avatar_path

                profile_photo = tk.PhotoImage(file=friend_avatar_path)
                profile_photo_label = ttk.Label(friend_frame, image=profile_photo)
                profile_photo_label.image = profile_photo

                friend_name = ttk.Label(friend_frame, text=user['real_name'], anchor=tk.W)

                message_this_friend = partial(self.open_chat_window, username=user["username"], real_name=user["real_name"], avatar=friend_avatar_path)
                block_this_friend = partial(self.block_friend, username=user["username"])

                message_button = ttk.Button(friend_frame, text="Chat", command=message_this_friend)
                block_button = ttk.Button(friend_frame, text="Block", command=block_this_friend)

                profile_photo_label.pack(side=tk.LEFT)
                friend_name.pack(side=tk.LEFT)
                message_button.pack(side=tk.RIGHT)
                block_button.pack(side=tk.RIGHT, padx=(0, 30))

                friend_frame.pack(fill=tk.X, expand=1) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def _ParseScanReportXML(body, content_type):
        if content_type != 'Content-Type: text/xml; name=report.xml':
            raise ValueError("Invalid content type")
        return as_xml(base64.urlsafe_b64decode(body)) 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def _ParseScanReportCSV(body, content_type):
        if content_type != 'Content-Type: text/csv; name=report.csv':
            raise ValueError("Invalid content type")
        csv_ = base64.urlsafe_b64decode(body).decode('utf8')
        report_data = csv.DictReader(io.StringIO(csv_))
        return report_data

    #
    # The following functions implement the Role Management API:
    # ========================================================= 

# 需要导入模块: import base64 [as 别名]
# 或者: from base64 import urlsafe_b64decode [as 别名]
def encrypt(self, iterations: int = 100_000) -> bytes:
        """Encrypt secret."""
        salt = secrets.token_bytes(16)
        key = self.__derive_key(salt, iterations)
        return urlsafe_b64encode(
            b"%b%b%b" % (salt,
                         iterations.to_bytes(4, "big"),
                         urlsafe_b64decode(Fernet(key).encrypt(self.secret))))