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from hashlib import sha1
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import hmac
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import requests
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import logging
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import json
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import ckan.plugins as plugins
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import ckan.plugins.toolkit as toolkit
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import ckan.logic as logic
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from pylons import config
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from ckan.common import request, _
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from ckan.logic.action.create import _group_or_org_create as group_or_org_create
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from ckan.logic.action.create import user_create
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from ckan.logic.action.delete import _group_or_org_purge
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plugin_config_prefix = 'ckanext.ozwillo_organization_api.'
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log = logging.getLogger(__name__)
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def valid_signature_required(func):
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signature_header_name = config.get(plugin_config_prefix + 'signature_header_name',
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'X-Hub-Signature')
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instantiated_secret = config.get(plugin_config_prefix + 'instantiation_secret',
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'secret')
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def wrapper(context, data):
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if signature_header_name in request.headers:
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if request.headers[signature_header_name].startswith('sha1='):
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algo, received_hmac = request.headers[signature_header_name].rsplit('=')
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computed_hmac = hmac.new(instantiated_secret, request.body, sha1).hexdigest()
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# the received hmac is uppercase according to
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# http://doc.ozwillo.com/#ref-3-2-1
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if received_hmac != computed_hmac.upper():
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raise logic.NotAuthorized(_('Invalid HMAC'))
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else:
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raise logic.ValidationError(_('Invalid HMAC algo'))
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else:
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raise logic.NotAuthorized(_("No HMAC in the header"))
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return func(context, data)
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return wrapper
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@valid_signature_required
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def create_organization(context, data_dict):
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context['ignore_auth'] = True
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model = context['model']
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session = context['session']
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destruction_secret = config.get(plugin_config_prefix + 'destruction_secret',
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'changeme')
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client_id = data_dict.pop('client_id')
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client_secret = data_dict.pop('client_secret')
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instance_id = data_dict.pop('instance_id')
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# re-mapping received dict
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registration_uri = data_dict.pop('instance_registration_uri')
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organization = data_dict['organization']
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user = data_dict['user']
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user_dict = {
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'name': user['name'].lower().replace(' ', ''),
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'email': user['email_address'],
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'password': user['id']
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}
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user_obj = model.User.get(user_dict['name'])
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org_dict = {
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'type': 'organization',
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'name': organization['name'].lower().replace(' ', '-'),
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'id': instance_id,
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'title': organization['name'],
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'description': organization['type'],
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'user': user_dict['name']
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}
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if not user_obj:
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user_create(context, user_dict)
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context['user'] = user_dict['name']
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try:
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delete_uri = toolkit.url_for(host=request.host,
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controller='api', action='action',
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logic_function="delete-ozwillo-organization",
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ver=context['api_version'],
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qualified=True)
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organization_uri = toolkit.url_for(host=request.host,
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controller='organization',
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action='read',
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id=org_dict['name'],
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qualified=True)
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default_icon_url = toolkit.url_for(host=request.host,
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qualified=True,
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controller='home',
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action='index') + 'organization_icon.png'
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group_or_org_create(context, org_dict, is_org=True)
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# setting organization as active explicitely
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group = model.Group.get(org_dict['name'])
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group.state = 'active'
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group.image_url = default_icon_url
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group.save()
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model.repo.new_revision()
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model.GroupExtra(group_id=group.id, key='client_id',
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value=client_id).save()
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model.GroupExtra(group_id=group.id, key='client_secret',
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value=client_secret).save()
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session.flush()
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# notify about organization creation
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services = {'services': [{
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'local_id': 'organization',
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'name': org_dict['title'],
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'service_uri': organization_uri + '/sso',
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'description': 'Organization ' + org_dict['name'] + ' on CKAN',
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'tos_uri': organization_uri,
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'policy_uri': organization_uri,
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'icon': group.image_url,
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'payment_option': 'FREE',
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'target_audience': ['PUBLIC_BODIES'],
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'contacts': [organization_uri],
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'redirect_uris': [organization_uri + '/callback'],
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'visible': True}],
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'instance_id': instance_id,
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'destruction_uri': delete_uri,
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'destruction_secret': destruction_secret,
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'needed_scopes': [{
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'scope_id': 'profile',
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'motivation': 'Used to link user to the organization'
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}]
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}
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headers = {'Content-type': 'application/json',
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'Accept': 'application/json'}
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requests.post(registration_uri,
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data=json.dumps(services),
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auth=(client_id, client_secret),
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headers=headers
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)
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except Exception, e:
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log.debug('Exception "%s" occured while creating organization' % e)
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requests.delete(registration_uri)
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@valid_signature_required
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def delete_organization(context, data_dict):
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data_dict['id'] = data_dict.pop('instance_id')
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context['ignore_auth'] = True
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_group_or_org_purge(context, data_dict, is_org=True)
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class OzwilloOrganizationApiPlugin(plugins.SingletonPlugin):
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"""
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API for OASIS to create and delete an organization
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"""
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plugins.implements(plugins.IActions)
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plugins.implements(plugins.IConfigurer)
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def update_config(self, config):
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toolkit.add_public_directory(config, 'public')
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def get_actions(self):
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return {
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'create-ozwillo-organization': create_organization,
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'delete-ozwillo-organization': delete_organization
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}
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