Python filenames

[LukaP]

Im making a messaging server and client in python for uni. We have to implement SSL/TLS encryption. 

 

So i use this code to create a context, but come up with a problem when i try to pass certificate and key files to it

def setup_SSL_context():

	#uporabi samo TLS, ne SSL
	context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
	# certifikat je obvezen
	context.verify_mode = ssl.CERT_REQUIRED
	#nalozi svoje certifikate
	context.load_cert_chain(certfile="luka.pem", keyfile="lukakey.pem") # the line that confuses python
	# nalozi certifikate CAjev (samopodp. cert.= svoja CA!)
	context.load_verify_locations('server.pem')
	# nastavi SSL CipherSuites (nacin kriptiranja)
	context.set_ciphers('AES128-SHA')
	return context

if i directly pass the files like that, its all working properly, but well, i want this client to support more than one user, so my solution was to pass filenames as formatted strings like this

username = input() # yes i did input luka...
#foo
context.load_cert_chain(certfile="[].pem".format(username), keyfile="[]key.pem".format(username))

which threw a FileNotFound Exception, but only on the lukakey.pem file...

 

Does anyone have any idea why it does that?

[Adraen]

14 minutes ago, LukaP said:

context.load_cert_chain(certfile="[].pem".format(username), keyfile="[]key.pem".format(username))

Sounds like a fun project!, You are using the wrong syntax for the string form, change [] to {} as shown below

 

>>> username = "hello"
>>> "[].pem".format(username)
'[].pem'
>>> "{}.pem".format(username)
'hello.pem'
>>>

 

[LukaP]

2 minutes ago, Adraen said:

You are using [] instead of {}

 

>>> username = "hello"
>>> "[].pem".format(username)
'[].pem'
>>> "{}.pem".format(username)
'hello.pem'
>>>

 

I am a moron, thank you

[cesrai]

On 6/9/2016 at 7:07 PM, LukaP said:

I am a moron, thank you

I agree from the bottom of my heart <3