119 lines
3.4 KiB
Python
119 lines
3.4 KiB
Python
import logging
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from functools import wraps
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from flask import request, make_response, _request_ctx_stack, abort, session
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from flask.ext.principal import identity_changed, Identity
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from base64 import b64decode
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from data import model
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from app import app
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from permissions import QuayDeferredPermissionUser
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from util.names import parse_namespace_repository
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logger = logging.getLogger(__name__)
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def get_authenticated_user():
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return getattr(_request_ctx_stack.top, 'authenticated_user', None)
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def get_validated_token():
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return getattr(_request_ctx_stack.top, 'validated_token', None)
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def process_basic_auth(auth):
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normalized = [part.strip() for part in auth.split(' ') if part]
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if normalized[0].lower() != 'basic' or len(normalized) != 2:
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logger.debug('Invalid basic auth format.')
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return
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credentials = b64decode(normalized[1]).split(':')
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if len(credentials) != 2:
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logger.debug('Invalid basic auth credential formet.')
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authenticated = model.verify_user(credentials[0], credentials[1])
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if authenticated:
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logger.debug('Successfully validated user: %s' % authenticated.username)
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ctx = _request_ctx_stack.top
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ctx.authenticated_user = authenticated
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new_identity = QuayDeferredPermissionUser(authenticated.username,
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'username')
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identity_changed.send(app, identity=new_identity)
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return
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# We weren't able to authenticate via basic auth.
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logger.debug('Basic auth present but could not be validated.')
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abort(401)
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def process_token(auth):
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normalized = [part.strip() for part in auth.split(' ') if part]
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if normalized[0].lower() != 'token' or len(normalized) != 2:
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logger.debug('Invalid token format.')
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return
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token_details = normalized[1].split(',')
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if len(token_details) != 2:
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logger.debug('Invalid token format.')
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return
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token_vals = {val[0]: val[1] for val in
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(detail.split('=') for detail in token_details)}
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if ('signature' not in token_vals or 'repository' not in token_vals):
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logger.debug('Invalid token components.')
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return
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unquoted = token_vals['repository'][1:-1]
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namespace, repository = parse_namespace_repository(unquoted)
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logger.debug('Validing signature: %s' % token_vals['signature'])
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validated = model.verify_token(token_vals['signature'], namespace,
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repository)
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if validated:
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session['repository'] = repository
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session['namespace'] = namespace
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logger.debug('Successfully validated token: %s' % validated.code)
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ctx = _request_ctx_stack.top
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ctx.validated_token = validated
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identity_changed.send(app, identity=Identity(validated.code, 'token'))
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return
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# WE weren't able to authenticate the token
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logger.debug('Token present but could not be validated.')
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abort(401)
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def process_auth(f):
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@wraps(f)
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def wrapper(*args, **kwargs):
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auth = request.headers.get('authorization', '')
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if auth:
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logger.debug('Validating auth header: %s' % auth)
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process_token(auth)
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process_basic_auth(auth)
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else:
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logger.debug('No auth header.')
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return f(*args, **kwargs)
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return wrapper
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def extract_namespace_repo_from_session(f):
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@wraps(f)
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def wrapper(*args, **kwargs):
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if 'namespace' not in session or 'repository' not in session:
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logger.debug('Unable to load namespace or repository from session.')
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abort(400)
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return f(session['namespace'], session['repository'], *args, **kwargs)
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return wrapper
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