Hi,

You can do the authentication from the mobile app like this,

request = urllib2.Request(
    server_url+'/web/session/authenticate',
    json.dumps({
        'jsonrpc': '2.0',
        'params': {
            'db': db,
            'login': user,
            'password': password,
        },
    }),
    {'Content-type': 'application/json'})
result = urllib2.urlopen(request).read()
result = json.loads(result)

Then in the result you will get the session_id if the authentication is success. You can use this session_id as authentication for the database operation.

Thanks

I think you just need to refer to the origin code of the odoo login function,  use the same encrypted method to completed the login process, there are not any differents I think.