144 lines
4.4 KiB
Python
144 lines
4.4 KiB
Python
import logging
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import re
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import time
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import jwt
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from flask import request, jsonify, abort
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from cachetools import lru_cache
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from app import app
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from data import model
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from auth.auth import process_auth
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from auth.auth_context import get_authenticated_user, get_validated_token
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from auth.permissions import (ModifyRepositoryPermission, ReadRepositoryPermission,
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CreateRepositoryPermission)
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from endpoints.v2 import v2_bp
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from util.cache import no_cache
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from util.names import parse_namespace_repository, REPOSITORY_NAME_REGEX
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from endpoints.decorators import anon_protect
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logger = logging.getLogger(__name__)
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TOKEN_VALIDITY_LIFETIME_S = 60 * 60 # 1 hour
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SCOPE_REGEX = re.compile(
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r'^repository:([\.a-zA-Z0-9_\-]+/[\.a-zA-Z0-9_\-]+):(((push|pull|\*),)*(push|pull|\*))$'
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)
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ANONYMOUS_SUB = '(anonymous)'
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@lru_cache(maxsize=1)
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def load_certificate_bytes(certificate_file_path):
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with open(certificate_file_path) as cert_file:
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return ''.join(cert_file.readlines()[1:-1]).rstrip('\n')
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@lru_cache(maxsize=1)
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def load_private_key(private_key_file_path):
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with open(private_key_file_path) as private_key_file:
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return private_key_file.read()
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@v2_bp.route('/auth')
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@process_auth
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@no_cache
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@anon_protect
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def generate_registry_jwt():
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""" This endpoint will generate a JWT conforming to the Docker registry v2 auth spec:
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https://docs.docker.com/registry/spec/auth/token/
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"""
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audience_param = request.args.get('service')
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logger.debug('Request audience: %s', audience_param)
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scope_param = request.args.get('scope')
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logger.debug('Scope request: %s', scope_param)
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user = get_authenticated_user()
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logger.debug('Authenticated user: %s', user)
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token = get_validated_token()
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logger.debug('Authenticated token: %s', token)
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access = []
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if scope_param is not None:
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match = SCOPE_REGEX.match(scope_param)
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if match is None:
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logger.debug('Match: %s', match)
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logger.debug('len: %s', len(scope_param))
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logger.warning('Unable to decode repository and actions: %s', scope_param)
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abort(400)
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logger.debug('Match: %s', match.groups())
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namespace_and_repo = match.group(1)
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actions = match.group(2).split(',')
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namespace, reponame = parse_namespace_repository(namespace_and_repo)
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# Ensure that we are never creating an invalid repository.
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if not REPOSITORY_NAME_REGEX.match(reponame):
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abort(400)
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final_actions = []
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if 'push' in actions:
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# If there is no valid user or token, then the repository cannot be
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# accessed.
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if user is None and token is None:
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abort(401)
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# Lookup the repository. If it exists, make sure the entity has modify
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# permission. Otherwise, make sure the entity has create permission.
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repo = model.repository.get_repository(namespace, reponame)
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if repo:
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if not ModifyRepositoryPermission(namespace, reponame).can():
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abort(403)
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else:
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if not CreateRepositoryPermission(namespace).can() or user is None:
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abort(403)
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logger.debug('Creating repository: %s/%s', namespace, reponame)
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model.repository.create_repository(namespace, reponame, user)
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final_actions.append('push')
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if 'pull' in actions:
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# Grant pull if the user can read the repo or it is public. We also
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# grant it if the user already has push, as they can clearly change
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# the repository.
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if (ReadRepositoryPermission(namespace, reponame).can() or
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model.repository.repository_is_public(namespace, reponame) or
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'push' in final_actions):
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final_actions.append('pull')
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else:
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abort(403)
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access.append({
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'type': 'repository',
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'name': namespace_and_repo,
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'actions': final_actions,
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})
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elif user is None and token is None:
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# In this case, we are doing an auth flow, and it's not an anonymous pull
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return abort(401)
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token_data = {
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'iss': app.config['JWT_AUTH_TOKEN_ISSUER'],
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'aud': audience_param,
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'nbf': int(time.time()),
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'iat': int(time.time()),
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'exp': int(time.time() + TOKEN_VALIDITY_LIFETIME_S),
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'sub': user.username if user else ANONYMOUS_SUB,
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'access': access,
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}
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certificate = load_certificate_bytes(app.config['JWT_AUTH_CERTIFICATE_PATH'])
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token_headers = {
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'x5c': [certificate],
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}
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private_key = load_private_key(app.config['JWT_AUTH_PRIVATE_KEY_PATH'])
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return jsonify({'token':jwt.encode(token_data, private_key, 'RS256', headers=token_headers)})
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