mirror of
https://github.com/mikf/gallery-dl.git
synced 2024-11-22 18:53:21 +01:00
6a31ada9e3
OAuth support for SmugMug needs some additional features (auth-rebuild on redirect, query parameters in URL, ...) and fixing this in the old code wouldn't work all that well.
102 lines
3.0 KiB
Python
102 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright 2018 Mike Fährmann
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License version 2 as
|
|
# published by the Free Software Foundation.
|
|
|
|
"""OAuth helper functions and classes"""
|
|
|
|
import hmac
|
|
import time
|
|
import base64
|
|
import random
|
|
import string
|
|
import hashlib
|
|
import urllib.parse
|
|
|
|
import requests
|
|
import requests.auth
|
|
|
|
from . import text
|
|
|
|
|
|
class OAuth1Session(requests.Session):
|
|
"""Extension to requests.Session objects to support OAuth 1.0"""
|
|
|
|
def __init__(self, consumer_key, consumer_secret,
|
|
token=None, token_secret=None):
|
|
|
|
requests.Session.__init__(self)
|
|
self.auth = OAuth1Client(
|
|
consumer_key, consumer_secret,
|
|
token, token_secret,
|
|
)
|
|
|
|
def rebuild_auth(self, prepared_request, response):
|
|
if "Authorization" in prepared_request.headers:
|
|
del prepared_request.headers["Authorization"]
|
|
prepared_request.prepare_auth(self.auth)
|
|
|
|
|
|
class OAuth1Client(requests.auth.AuthBase):
|
|
"""OAuth1.0a authentication"""
|
|
def __init__(self, consumer_key, consumer_secret,
|
|
token=None, token_secret=None):
|
|
|
|
self.consumer_key = consumer_key
|
|
self.consumer_secret = consumer_secret
|
|
self.token = token
|
|
self.token_secret = token_secret
|
|
|
|
def __call__(self, request):
|
|
oauth_params = [
|
|
("oauth_consumer_key", self.consumer_key),
|
|
("oauth_nonce", nonce(16)),
|
|
("oauth_signature_method", "HMAC-SHA1"),
|
|
("oauth_timestamp", str(int(time.time()))),
|
|
("oauth_version", "1.0"),
|
|
]
|
|
if self.token:
|
|
oauth_params.append(("oauth_token", self.token))
|
|
|
|
signature = self.generate_signature(request, oauth_params)
|
|
oauth_params.append(("oauth_signature", signature))
|
|
|
|
request.headers["Authorization"] = "OAuth " + ",".join(
|
|
key + '="' + value + '"' for key, value in oauth_params)
|
|
|
|
return request
|
|
|
|
def generate_signature(self, request, params):
|
|
"""Generate 'oauth_signature' value"""
|
|
url, _, query = request.url.partition("?")
|
|
|
|
params = params.copy()
|
|
for key, value in text.parse_query(query).items():
|
|
params.append((quote(key), quote(value)))
|
|
params.sort()
|
|
query = "&".join("=".join(item) for item in params)
|
|
|
|
message = concat(request.method, url, query).encode()
|
|
key = concat(self.consumer_secret, self.token_secret or "").encode()
|
|
signature = hmac.new(key, message, hashlib.sha1).digest()
|
|
|
|
return quote(base64.b64encode(signature).decode())
|
|
|
|
|
|
def concat(*args):
|
|
"""Concatenate 'args'"""
|
|
return "&".join(quote(item) for item in args)
|
|
|
|
|
|
def nonce(size, alphabet=string.ascii_letters):
|
|
"""Generate a nonce value with 'size' characters"""
|
|
return "".join(random.choice(alphabet) for _ in range(size))
|
|
|
|
|
|
def quote(value, quote=urllib.parse.quote):
|
|
"""Quote 'value' according to the OAuth1.0 standard"""
|
|
return quote(value, "~")
|