system: You are an expert security code reviewer. You will be shown a source code file. Your task is to name the single function or class that contains the specified CWE vulnerability.

OUTPUT FORMAT: Respond with the exact function or class name (no parentheses, no qualifiers, no module prefixes), wrapped in \boxed{...}. Example: `\boxed{salted_hmac}`. Output the boxed name ONLY -- no explanation, no other text.

user: ```python
# coding: utf-8
#!/usr/bin/env python3


'Tencent ASR && TTS API'
__author__ = 'Charles Li, Joseph Pan'

import time
import uuid
import json
import random
import requests
import hmac
import base64
import urllib
#腾讯web API一句话识别请求
class tencentSpeech(object):
    __slots__ = 'SECRET_ID', 'SECRET_KEY', 'SourceType', 'URL', 'VoiceFormat', 'PrimaryLanguage', 'Text', 'VoiceType', 'Region'

    def __init__(self, SECRET_KEY, SECRET_ID):
        self.SECRET_KEY, self.SECRET_ID = SECRET_KEY, SECRET_ID
    @property
    def secret_id(self):
        return self.SECRET_ID
    @secret_id.setter
    def secret_id(self, SECRET_ID):
        if not isinstance(SECRET_ID, str):
            raise ValueError('SecretId must be a string!')
        if len(SECRET_ID)==0:
            raise ValueError('SecretId can not be empty!')
        self.SECRET_ID = SECRET_ID
    @property
    def secret_key(self):
        return self.SECRET_KEY
    @secret_key.setter
    def secret_key(self, SECRET_KEY):
        if not isinstance(SECRET_KEY, str):
            raise ValueError('SecretKey must be a string!')
        if len(SECRET_KEY)==0:
            raise ValueError('SecretKey can not be empty!')
        self.SECRET_KEY = SECRET_KEY
    @property
    def source_type(self):
        return self.sourcetype
    @source_type.setter
    def source_type(self, SourceType):
        if not isinstance(SourceType, str):
            raise ValueError('SecretType must be an string!')
        if len(SourceType)==0:
            raise ValueError('SourceType can not be empty!')
        self.SourceType = SourceType
    @property
    def url(self):
        return self.URL
    @url.setter
    def url(self, URL):
        if not isinstance(URL, str):
            raise ValueError('url must be an string!')
        if len(URL)==0:
            raise ValueError('url can not be empty!')
        self.URL = URL
    @property
    def voiceformat(self):
        return self.VoiceFormat
    @voiceformat.setter
    def voiceformat(self, VoiceFormat):
        if not isinstance(VoiceFormat, str):
            raise ValueError('voiceformat must be an string!')
        if len(VoiceFormat)==0:
            raise ValueError('voiceformat can not be empty!')
        self.VoiceFormat = VoiceFormat
    @property
    def text(self):
        return self.Text
    @text.setter
    def text(self, Text):
        if not isinstance(Text, str):
            raise ValueError('text must be an string!')
        if len(Text)==0:
            raise ValueError('text can not be empty!')
        self.Text = Text
    @property
    def region(self):
        return self.Region
    @region.setter
    def region(self, Region):
        if not isinstance(Region, str):
            raise ValueError('region must be an string!')
        if len(Region)==0:
            raise ValueError('region can not be empty!')
        self.Region = Region
    @property
    def primarylanguage(self):
        return self.PrimaryLanguage
    @primarylanguage.setter
    def primarylanguage(self, PrimaryLanguage):
        self.PrimaryLanguage = PrimaryLanguage
    @property
    def voicetype(self):
        return self.VoiceType
    @voicetype.setter
    def voicetype(self, VoiceType):        
        self.VoiceType = VoiceType
    def TTS(self, text, voicetype, primarylanguage, region):
        self.text, self.voicetype, self.primarylanguage, self.region = text, voicetype, primarylanguage, region
        return self.textToSpeech()
    def textToSpeech(self):
        #生成body
        def make_body(config_dict, sign_encode):
            ##注意URL编码的时候分str编码，整段编码会丢data
            body = ''
            for a, b in config_dict:
                body += urllib.parse.quote(a) + '=' + urllib.parse.quote(str(b)) + '&'
            return body + 'Signature=' + sign_encode
        HOST = 'aai.tencentcloudapi.com'
        config_dict= {
                        'Action'         : 'TextToVoice',
                        'Version'        : '2018-05-22',
                        'ProjectId'      : 0,
                        'Region'         : self.Region,
                        'VoiceType'      : self.VoiceType,
                        'Timestamp'      : int(time.time()),
                        'Nonce'          : random.randint(100000, 200000),
                        'SecretId'       : self.SECRET_ID,
                        'Text'           : self.Text,
                        'PrimaryLanguage': self.PrimaryLanguage,
                        'ModelType'      : 1,
                        'SessionId'      : uuid.uuid1()
        }
        #按key排序
        config_dict = sorted(config_dict.items())
        signstr = self.formatSignString(config_dict)
        sign_encode = urllib.parse.quote(self.encode_sign(signstr, self.SECRET_KEY))
        body = make_body(config_dict, sign_encode)
        #Get URL
        req_url = "https://aai.tencentcloudapi.com"
        header = {
            'Host' : HOST,
            'Content-Type' : 'application/x-www-form-urlencoded',
            'Charset' : 'UTF-8'
        }
        request = requests.post(req_url, headers = header, data = body)
        #有些音频utf8解码失败，存在编码错误
        s = request.content.decode("utf8","ignore")
        return json.loads(s)
    def ASR(self, URL, voiceformat, sourcetype, region):
        self.url, self.voiceformat, self.source_type, self.region = URL, voiceformat, sourcetype, region
        return self.oneSentenceRecognition()
    def oneSentenceRecognition(self):
        #生成body
        def make_body(config_dict, sign_encode):
            ##注意URL编码的时候分str编码，整段编码会丢data
            body = ''
            for a, b in config_dict:
                body += urllib.parse.quote(a) + '=' + urllib.parse.quote(str(b)) + '&'
            return body + 'Signature=' + sign_encode
        HOST = 'aai.tencentcloudapi.com'
        config_dict= {
                        'Action'         : 'SentenceRecognition',
                        'Version'        : '2018-05-22',
                        'Region'         : self.Region,
                        'ProjectId'      : 0,
                        'SubServiceType' : 2,
                        'EngSerViceType' : '16k',
                        'VoiceFormat'    : self.VoiceFormat,
                        'UsrAudioKey'    : random.randint(0, 20),
                        'Timestamp'      : int(time.time()),
                        'Nonce'          : random.randint(100000, 200000),
                        'SecretId'       : self.SECRET_ID,
                        'SourceType'     : self.SourceType
        }
        if self.SourceType == '0':
            config_dict['Url'] = urllib.parse.quote(str(self.url))
        else:
            #不能大于1M
            file_path = self.URL
            file = open(file_path, 'rb')
            content = file.read()
            config_dict['DataLen'] = len(content)
            config_dict['Data'] = base64.b64encode(content).decode()
            #config_dict['Data'] = content
            file.close()
        #按key排序
        config_dict = sorted(config_dict.items())
        signstr = self.formatSignString(config_dict)
        sign_encode = urllib.parse.quote(self.encode_sign(signstr, self.SECRET_KEY))
        body = make_body(config_dict, sign_encode)
        #Get URL
        req_url = "https://aai.tencentcloudapi.com"
        header = {
            'Host' : HOST,
            'Content-Type' : 'application/x-www-form-urlencoded',
            'Charset' : 'UTF-8'
        }
        request = requests.post(req_url, headers = header, data = body)
        #有些音频utf8解码失败，存在编码错误
        s = request.content.decode("utf8","ignore")
        return s
    #拼接url和参数
    def formatSignString(self, config_dict):
        signstr="POSTaai.tencentcloudapi.com/?"
        argArr = []
        for a, b in config_dict:
            argArr.append(a + "=" + str(b))
        config_str = "&".join(argArr)
        return signstr + config_str
    #生成签名
    def encode_sign(self, signstr, SECRET_KEY):
        myhmac = hmac.new(SECRET_KEY.encode(), signstr.encode(), digestmod = 'sha1')
        code = myhmac.digest()
        #hmac() 完一定要decode()和 python 2 hmac不一样
        signature = base64.b64encode(code).decode()
        return signature
        

```

Name the function or class in this code that contains a `CWE-327: Use of a Broken or Risky Cryptographic Algorithm` vulnerability.
Answer: encode_sign