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Completed
Pull Request — develop (#272)
by
unknown
01:10
created

CoturnHMAC.fetch_token()   B

↳ Parent: CoturnHMAC

Complexity

Conditions 3

Size

Total Lines 24

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 3
dl 0
loc 24
rs 8.9713
c 0
b 0
f 0
1 
"""
2 
Coturn static auth api
3 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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Creates ice_server record with temporary credentials computed from coturn static-auth-secret

            


            
                                                                                                            
                            
            
                                    
            
            

                
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http://stackoverflow.com/a/35767224

            


            
                                                                                                            
                            
            
                                    
            
            

                
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"""

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import time

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import hmac

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import base64

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from server.config import COTURN_URLS, COTURN_KEYS, TWILIO_TTL

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class CoturnHMAC:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __init__(self, coturn_urls=None, coturn_keys=None):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.coturn_urls = coturn_urls or COTURN_URLS

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.coturn_keys = coturn_keys or COTURN_KEYS

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    def fetch_token(self, username='faf-user', ttl=None):

            


            
                                                        
            
                                    
            
            

                
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        servers = []

            


            
                                                        
            
                                    
            
            

                
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        ttl = ttl or TWILIO_TTL

            


            
                                                        
            
                                    
            
            

                
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        if ttl is not None:

            


            
                                                        
            
                                    
            
            

                
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            ttl = int(ttl)

            


            
                                                        
            
                                    
            
            

                
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        else:

            


            
                                                        
            
                                    
            
            

                
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            ttl = 3600*24

            


            
                                                        
            
                                    
            
            

                
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        # create hmac of coturn_key + timestamp:username

            


            
                                                        
            
                                    
            
            

                
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        timestamp = int(time.time()) + ttl

            


            
                                                        
            
                                    
            
            

                
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        token_name = "{}:{}".format(timestamp, username)

            


            
                                                        
            
                                    
            
            

                
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        for coturn_url, coturn_key in zip(self.coturn_urls, self.coturn_keys):

            


            
                                                        
            
                                    
            
            

                
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            secret = hmac.new(coturn_key)

            


            
                                                        
            
                                    
            
            

                
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            hmac.update(token_name)

            


            
                                                        
            
                                    
            
            

                
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            auth_token = base64.b64encode(hmac.digest())

            


            
                                                        
            
                                    
            
            

                
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            server.append(dict(url=coturn_url,

            


            
                                                        
            
                                    
            
            

                
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                               username=token_name,

            


            
                                                        
            
                                    
            
            

                
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                               credential=auth_token))

            


            
                                                        
            
                                    
            
            

                
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        return servers

            


            
                                                        
            
                                    
            
            

                
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