re-write webauth implementation for steam backend changes

.gitignore

@@ -33,3 +33,5 @@
 .coverage
 *.swp
 *.bin
+
+venv

steam/webauth.py

@@ -73,6 +73,115 @@
     _cli_input = input
 
 
+API_HEADERS = {
+    'origin': 'https://steamcommunity.com',
+    'referer': 'https://steamcommunity.com/',
+    'accept': 'application/json, text/plain, */*'
+}
+
+
+def sendAPIRequest(data, sApiInterface, sApiMethod, sApiVersion):
+    sUrl = "https://api.steampowered.com/{}Service/{}/v{}".format(sApiInterface, sApiMethod, sApiVersion)
+    if sApiMethod == "GetPasswordRSAPublicKey":
+        res = requests.get(sUrl, timeout=10, headers=API_HEADERS, params=data)
+    else:
+        res = requests.post(sUrl, timeout=10, headers=API_HEADERS, data=data)
+
+    res.raise_for_status()
+    return res.json()
+
+
+# Updated implementation of WebAuth for the new steam login method (old one is gutted on valve's end and cannot be used anymore)
+# TODO: Steam guard support
+# TODO: Replace WebAuth with this new class when everything is fully implemented (steam guard)
+class WebAuth2(object):
+    username = None
+    password = None
+    steam_id = None
+    clientID = None
+    requestID = None
+    refreshToken = None
+    accessToken = None
+    session_id = None
+    logged_on = False
+    session = None
+    userAgent = None
+
+    # Pretend to be chrome on windows, made this act as most like a browser as possible to (hopefully) avoid breakage in the future from valve
+    def __init__(self, username='', password='', userAgent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36'):
+        self.session = requests.session()
+        self.userAgent = userAgent
+        self.username = username
+        self.password = password
+        self.session.headers['User-Agent'] = self.userAgent
+
+    def _getRsaKey(self):
+        return sendAPIRequest({'account_name': self.username}, "IAuthentication", 'GetPasswordRSAPublicKey', 1)
+
+    def _encryptPassword(self):
+        r = self._getRsaKey()
+
+        mod = intBase(r['response']['publickey_mod'], 16)
+        exp = intBase(r['response']['publickey_exp'], 16)
+
+        pubKey = rsa_publickey(mod, exp)
+        encrypted = pkcs1v15_encrypt(pubKey, self.password.encode('ascii'))
+        b64 = b64encode(encrypted)
+
+        return tuple((b64.decode('ascii'), r['response']['timestamp']))
+
+    def _startSessionWithCredentials(self, sAccountEncryptedPassword, iTimeStamp):
+        r = sendAPIRequest(
+            {'device_friendly_name': self.userAgent,
+             'account_name': self.username,
+             'encrypted_password': sAccountEncryptedPassword,
+             'encryption_timestamp': iTimeStamp,
+             'remember_login': '1',
+             'platform_type': '2',
+             'persistence': '1',
+             'website_id': 'Community'
+             }, 'IAuthentication', 'BeginAuthSessionViaCredentials', 1)
+        self.clientID = r['response']['client_id']
+        self.requestID = r['response']['request_id']
+        self.steam_id = SteamID(r['response']['steamid'])
+
+    def _startLoginSession(self):
+        encryptedPassword = self._encryptPassword()
+        self._startSessionWithCredentials(encryptedPassword[0], encryptedPassword[1])
+
+    def _pollLoginStatus(self):
+        r = sendAPIRequest({
+            'client_id': str(self.clientID),
+            'request_id': str(self.requestID)
+        }, 'IAuthentication', 'PollAuthSessionStatus', 1)
+        self.refreshToken = r['response']['refresh_token']
+        self.accessToken = r['response']['access_token']
+
+    def _finalizeLogin(self):
+        self.sessionID = generate_session_id()
+        self.logged_on = True
+        for domain in ['store.steampowered.com', 'help.steampowered.com', 'steamcommunity.com']:
+            self.session.cookies.set('sessionid', self.sessionID, domain=domain)
+            self.session.cookies.set('steamLoginSecure', str(self.steam_id.as_64) + "||" + str(self.accessToken), domain=domain)
+
+    def login(self, username='', password=''):
+        if self.logged_on:
+            return self.session
+
+        if username == '' or password == '':
+            if self.username == '' and self.password == '':
+                raise ValueError("Username or password is provided empty!")
+        else:
+            self.username = username
+            self.password = password
+
+        self._startLoginSession()
+        self._pollLoginStatus()
+        self._finalizeLogin()
+
+        return self.session
+
+
 class WebAuth(object):
     key = None
     logged_on = False    #: whether authentication has been completed successfully