feat(api): support OAuth2.0 and OIDC authentication, it has been tested with casdoor

feat(api): support OAuth2.0 and OIDC authentication, it has been tested with casdoor

cmdb-api/api/lib/perm/authentication/oauth2/routing.py

@@ -0,0 +1,118 @@
+# -*- coding:utf-8 -*-
+
+import secrets
+import uuid
+
+import requests
+from flask import Blueprint
+from flask import abort
+from flask import current_app
+from flask import redirect
+from flask import request
+from flask import session
+from flask import url_for
+from flask_login import login_user, logout_user
+from six.moves.urllib.parse import urlencode
+
+from api.lib.perm.acl.cache import UserCache
+
+blueprint = Blueprint('oauth2', __name__)
+
+
+@blueprint.route('/api/oauth2/login')
+@blueprint.route('/api/sso/login')
+def login():
+    if request.values.get("next"):
+        session["next"] = request.values.get("next")
+
+    session['oauth2_state'] = secrets.token_urlsafe(16)
+
+    qs = urlencode({
+        'client_id': current_app.config['OAUTH2_CLIENT_ID'],
+        'redirect_uri': url_for('oauth2.callback', _external=True),
+        'response_type': current_app.config['OAUTH2_RESPONSE_TYPE'],
+        'scope': ' '.join(current_app.config['OAUTH2_SCOPES'] or []),
+        'state': session['oauth2_state'],
+    })
+
+    return redirect("{}?{}".format(current_app.config['OAUTH2_AUTHORIZE_URL'].split('?')[0], qs))
+
+
+@blueprint.route('/api/oauth2/callback')
+def callback():
+    redirect_url = session.get("next") or current_app.config.get("OAUTH2_AFTER_LOGIN")
+
+    if request.values['state'] != session.get('oauth2_state'):
+        return abort(401, "state is invalid")
+
+    if 'code' not in request.values:
+        return abort(401, 'code is invalid')
+
+    response = requests.post(current_app.config['OAUTH2_TOKEN_URL'], data={
+        'client_id': current_app.config['OAUTH2_CLIENT_ID'],
+        'client_secret': current_app.config['OAUTH2_CLIENT_SECRET'],
+        'code': request.values['code'],
+        'grant_type': current_app.config['OAUTH2_GRANT_TYPE'],
+        'redirect_uri': url_for('oauth2.callback', _external=True),
+    }, headers={'Accept': 'application/json'})
+    if response.status_code != 200:
+        current_app.logger.error(response.text)
+        return abort(401)
+    oauth2_token = response.json().get('access_token')
+    if not oauth2_token:
+        return abort(401)
+
+    response = requests.get(current_app.config['OAUTH2_USER_INFO']['url'], headers={
+        'Authorization': 'Bearer {}'.format(oauth2_token),
+        'Accept': 'application/json',
+    })
+    if response.status_code != 200:
+        return abort(401)
+
+    email = current_app.config['OAUTH2_USER_INFO']['email'](response.json())
+    username = current_app.config['OAUTH2_USER_INFO']['username'](response.json())
+    user = UserCache.get(username)
+    if user is None:
+        current_app.logger.info("create user: {}".format(username))
+        from api.lib.perm.acl.user import UserCRUD
+
+        user_dict = dict(username=username, email=email)
+        user_dict['password'] = uuid.uuid4().hex
+
+        user = UserCRUD.add(**user_dict)
+
+    # log the user in
+    login_user(user)
+
+    from api.lib.perm.acl.acl import ACLManager
+    user_info = ACLManager.get_user_info(username)
+
+    session["acl"] = dict(uid=user_info.get("uid"),
+                          avatar=user.avatar if user else user_info.get("avatar"),
+                          userId=user_info.get("uid"),
+                          rid=user_info.get("rid"),
+                          userName=user_info.get("username"),
+                          nickName=user_info.get("nickname") or user_info.get("username"),
+                          parentRoles=user_info.get("parents"),
+                          childRoles=user_info.get("children"),
+                          roleName=user_info.get("role"))
+    session["uid"] = user_info.get("uid")
+
+    return redirect(redirect_url)
+
+
+@blueprint.route('/api/oauth2/logout')
+@blueprint.route('/api/sso/logout')
+def logout():
+    "acl" in session and session.pop("acl")
+    "uid" in session and session.pop("uid")
+    'oauth2_state' in session and session.pop('oauth2_state')
+    "next" in session and session.pop("next")
+
+    redirect_url = url_for('oauth2.login', _external=True, next=request.referrer)
+
+    logout_user()
+
+    current_app.logger.debug('Redirecting to: {0}'.format(redirect_url))
+
+    return redirect(redirect_url)