firebase
diff --git a/‎firebase_admin/_auth_client.py
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diff --git a/‎firebase_admin/_auth_providers.py
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+# Copyright 2020 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Firebase auth providers management sub module."""
+
+from urllib import parse
+
+import requests
+
+from firebase_admin import _auth_utils
+from firebase_admin import _user_mgt
+
+
+MAX_LIST_CONFIGS_RESULTS = 100
+
+
+class ProviderConfig:
+    """Parent type for all authentication provider config types."""
+
+    def __init__(self, data):
+        self._data = data
+
+    @property
+    def provider_id(self):
+        name = self._data['name']
+        return name.split('/')[-1]
+
+    @property
+    def display_name(self):
+        return self._data.get('displayName')
+
+    @property
+    def enabled(self):
+        return self._data.get('enabled', False)
+
+
+class OIDCProviderConfig(ProviderConfig):
+    """Represents the OIDC auth provider configuration.
+
+    See https://openid.net/specs/openid-connect-core-1_0-final.html.
+    """
+
+    @property
+    def issuer(self):
+        return self._data['issuer']
+
+    @property
+    def client_id(self):
+        return self._data['clientId']
+
+
+class SAMLProviderConfig(ProviderConfig):
+    """Represents he SAML auth provider configuration.
+
+    See http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-tech-overview-2.0.html.
+    """
+
+    @property
+    def idp_entity_id(self):
+        return self._data.get('idpConfig', {})['idpEntityId']
+
+    @property
+    def sso_url(self):
+        return self._data.get('idpConfig', {})['ssoUrl']
+
+    @property
+    def x509_certificates(self):
+        certs = self._data.get('idpConfig', {})['idpCertificates']
+        return [c['x509Certificate'] for c in certs]
+
+    @property
+    def callback_url(self):
+        return self._data.get('spConfig', {})['callbackUri']
+
+    @property
+    def rp_entity_id(self):
+        return self._data.get('spConfig', {})['spEntityId']
+
+
+class ListProviderConfigsPage:
+    """Represents a page of AuthProviderConfig instances retrieved from a Firebase project.
+
+    Provides methods for traversing the provider configs included in this page, as well as
+    retrieving subsequent pages. The iterator returned by ``iterate_all()`` can be used to iterate
+    through all provider configs in the Firebase project starting from this page.
+    """
+
+    def __init__(self, download, page_token, max_results):
+        self._download = download
+        self._max_results = max_results
+        self._current = download(page_token, max_results)
+
+    @property
+    def provider_configs(self):
+        """A list of ``AuthProviderConfig`` instances available in this page."""
+        raise NotImplementedError
+
+    @property
+    def next_page_token(self):
+        """Page token string for the next page (empty string indicates no more pages)."""
+        return self._current.get('nextPageToken', '')
+
+    @property
+    def has_next_page(self):
+        """A boolean indicating whether more pages are available."""
+        return bool(self.next_page_token)
+
+    def get_next_page(self):
+        """Retrieves the next page of provider configs, if available.
+
+        Returns:
+            ListProviderConfigsPage: Next page of provider configs, or None if this is the last
+                page.
+        """
+        if self.has_next_page:
+            return self.__class__(self._download, self.next_page_token, self._max_results)
+        return None
+
+    def iterate_all(self):
+        """Retrieves an iterator for provider configs.
+
+        Returned iterator will iterate through all the provider configs in the Firebase project
+        starting from this page. The iterator will never buffer more than one page of configs
+        in memory at a time.
+
+        Returns:
+            iterator: An iterator of AuthProviderConfig instances.
+        """
+        return _ProviderConfigIterator(self)
+
+
+class _ListOIDCProviderConfigsPage(ListProviderConfigsPage):
+
+    @property
+    def provider_configs(self):
+        return [OIDCProviderConfig(data) for data in self._current.get('oauthIdpConfigs', [])]
+
+
+class _ListSAMLProviderConfigsPage(ListProviderConfigsPage):
+
+    @property
+    def provider_configs(self):
+        return [SAMLProviderConfig(data) for data in self._current.get('inboundSamlConfigs', [])]
+
+
+class _ProviderConfigIterator(_auth_utils.PageIterator):
+
+    @property
+    def items(self):
+        return self._current_page.provider_configs
+
+
+class ProviderConfigClient:
+    """Client for managing Auth provider configurations."""
+
+    PROVIDER_CONFIG_URL = 'https://identitytoolkit.googleapis.com/v2beta1'
+
+    def __init__(self, http_client, project_id, tenant_id=None):
+        self.http_client = http_client
+        self.base_url = '{0}/projects/{1}'.format(self.PROVIDER_CONFIG_URL, project_id)
+        if tenant_id:
+            self.base_url += '/tenants/{0}'.format(tenant_id)
+
+    def get_oidc_provider_config(self, provider_id):
+        _validate_oidc_provider_id(provider_id)
+        body = self._make_request('get', '/oauthIdpConfigs/{0}'.format(provider_id))
+        return OIDCProviderConfig(body)
+
+    def create_oidc_provider_config(
+            self, provider_id, client_id, issuer, display_name=None, enabled=None):
+        """Creates a new OIDC provider config from the given parameters."""
+        _validate_oidc_provider_id(provider_id)
+        req = {
+            'clientId': _validate_non_empty_string(client_id, 'client_id'),
+            'issuer': _validate_url(issuer, 'issuer'),
+        }
+        if display_name is not None:
+            req['displayName'] = _auth_utils.validate_string(display_name, 'display_name')
+        if enabled is not None:
+            req['enabled'] = _auth_utils.validate_boolean(enabled, 'enabled')
+
+        params = 'oauthIdpConfigId={0}'.format(provider_id)
+        body = self._make_request('post', '/oauthIdpConfigs', json=req, params=params)
+        return OIDCProviderConfig(body)
+
+    def update_oidc_provider_config(
+            self, provider_id, client_id=None, issuer=None, display_name=None, enabled=None):
+        """Updates an existing OIDC provider config with the given parameters."""
+        _validate_oidc_provider_id(provider_id)
+        req = {}
+        if display_name is not None:
+            if display_name == _user_mgt.DELETE_ATTRIBUTE:
+                req['displayName'] = None
+            else:
+                req['displayName'] = _auth_utils.validate_string(display_name, 'display_name')
+        if enabled is not None:
+            req['enabled'] = _auth_utils.validate_boolean(enabled, 'enabled')
+        if client_id:
+            req['clientId'] = _validate_non_empty_string(client_id, 'client_id')
+        if issuer:
+            req['issuer'] = _validate_url(issuer, 'issuer')
+
+        if not req:
+            raise ValueError('At least one parameter must be specified for update.')
+
+        update_mask = _auth_utils.build_update_mask(req)
+        params = 'updateMask={0}'.format(','.join(update_mask))
+        url = '/oauthIdpConfigs/{0}'.format(provider_id)
+        body = self._make_request('patch', url, json=req, params=params)
+        return OIDCProviderConfig(body)
+
+    def delete_oidc_provider_config(self, provider_id):
+        _validate_oidc_provider_id(provider_id)
+        self._make_request('delete', '/oauthIdpConfigs/{0}'.format(provider_id))
+
+    def list_oidc_provider_configs(self, page_token=None, max_results=MAX_LIST_CONFIGS_RESULTS):
+        return _ListOIDCProviderConfigsPage(
+            self._fetch_oidc_provider_configs, page_token, max_results)
+
+    def _fetch_oidc_provider_configs(self, page_token=None, max_results=MAX_LIST_CONFIGS_RESULTS):
+        return self._fetch_provider_configs('/oauthIdpConfigs', page_token, max_results)
+
+    def get_saml_provider_config(self, provider_id):
+        _validate_saml_provider_id(provider_id)
+        body = self._make_request('get', '/inboundSamlConfigs/{0}'.format(provider_id))
+        return SAMLProviderConfig(body)
+
+    def create_saml_provider_config(
+            self, provider_id, idp_entity_id, sso_url, x509_certificates,
+            rp_entity_id, callback_url, display_name=None, enabled=None):
+        """Creates a new SAML provider config from the given parameters."""
+        _validate_saml_provider_id(provider_id)
+        req = {
+            'idpConfig': {
+                'idpEntityId': _validate_non_empty_string(idp_entity_id, 'idp_entity_id'),
+                'ssoUrl': _validate_url(sso_url, 'sso_url'),
+                'idpCertificates': _validate_x509_certificates(x509_certificates),
+            },
+            'spConfig': {
+                'spEntityId': _validate_non_empty_string(rp_entity_id, 'rp_entity_id'),
+                'callbackUri': _validate_url(callback_url, 'callback_url'),
+            },
+        }
+        if display_name is not None:
+            req['displayName'] = _auth_utils.validate_string(display_name, 'display_name')
+        if enabled is not None:
+            req['enabled'] = _auth_utils.validate_boolean(enabled, 'enabled')
+
+        params = 'inboundSamlConfigId={0}'.format(provider_id)
+        body = self._make_request('post', '/inboundSamlConfigs', json=req, params=params)
+        return SAMLProviderConfig(body)
+
+    def update_saml_provider_config(
+            self, provider_id, idp_entity_id=None, sso_url=None, x509_certificates=None,
+            rp_entity_id=None, callback_url=None, display_name=None, enabled=None):
+        """Updates an existing SAML provider config with the given parameters."""
+        _validate_saml_provider_id(provider_id)
+        idp_config = {}
+        if idp_entity_id is not None:
+            idp_config['idpEntityId'] = _validate_non_empty_string(idp_entity_id, 'idp_entity_id')
+        if sso_url is not None:
+            idp_config['ssoUrl'] = _validate_url(sso_url, 'sso_url')
+        if x509_certificates is not None:
+            idp_config['idpCertificates'] = _validate_x509_certificates(x509_certificates)
+
+        sp_config = {}
+        if rp_entity_id is not None:
+            sp_config['spEntityId'] = _validate_non_empty_string(rp_entity_id, 'rp_entity_id')
+        if callback_url is not None:
+            sp_config['callbackUri'] = _validate_url(callback_url, 'callback_url')
+
+        req = {}
+        if display_name is not None:
+            if display_name == _user_mgt.DELETE_ATTRIBUTE:
+                req['displayName'] = None
+            else:
+                req['displayName'] = _auth_utils.validate_string(display_name, 'display_name')
+        if enabled is not None:
+            req['enabled'] = _auth_utils.validate_boolean(enabled, 'enabled')
+        if idp_config:
+            req['idpConfig'] = idp_config
+        if sp_config:
+            req['spConfig'] = sp_config
+
+        if not req:
+            raise ValueError('At least one parameter must be specified for update.')
+
+        update_mask = _auth_utils.build_update_mask(req)
+        params = 'updateMask={0}'.format(','.join(update_mask))
+        url = '/inboundSamlConfigs/{0}'.format(provider_id)
+        body = self._make_request('patch', url, json=req, params=params)
+        return SAMLProviderConfig(body)
+
+    def delete_saml_provider_config(self, provider_id):
+        _validate_saml_provider_id(provider_id)
+        self._make_request('delete', '/inboundSamlConfigs/{0}'.format(provider_id))
+
+    def list_saml_provider_configs(self, page_token=None, max_results=MAX_LIST_CONFIGS_RESULTS):
+        return _ListSAMLProviderConfigsPage(
+            self._fetch_saml_provider_configs, page_token, max_results)
+
+    def _fetch_saml_provider_configs(self, page_token=None, max_results=MAX_LIST_CONFIGS_RESULTS):
+        return self._fetch_provider_configs('/inboundSamlConfigs', page_token, max_results)
+
+    def _fetch_provider_configs(self, path, page_token=None, max_results=MAX_LIST_CONFIGS_RESULTS):
+        """Fetches a page of auth provider configs"""
+        if page_token is not None:
+            if not isinstance(page_token, str) or not page_token:
+                raise ValueError('Page token must be a non-empty string.')
+        if not isinstance(max_results, int):
+            raise ValueError('Max results must be an integer.')
+        if max_results < 1 or max_results > MAX_LIST_CONFIGS_RESULTS:
+            raise ValueError(
+                'Max results must be a positive integer less than or equal to '
+                '{0}.'.format(MAX_LIST_CONFIGS_RESULTS))
+
+        params = 'pageSize={0}'.format(max_results)
+        if page_token:
+            params += '&pageToken={0}'.format(page_token)
+        return self._make_request('get', path, params=params)
+
+    def _make_request(self, method, path, **kwargs):
+        url = '{0}{1}'.format(self.base_url, path)
+        try:
+            return self.http_client.body(method, url, **kwargs)
+        except requests.exceptions.RequestException as error:
+            raise _auth_utils.handle_auth_backend_error(error)
+
+
+def _validate_oidc_provider_id(provider_id):
+    if not isinstance(provider_id, str):
+        raise ValueError(
+            'Invalid OIDC provider ID: {0}. Provider ID must be a non-empty string.'.format(
+                provider_id))
+    if not provider_id.startswith('oidc.'):
+        raise ValueError('Invalid OIDC provider ID: {0}.'.format(provider_id))
+    return provider_id
+
+
+def _validate_saml_provider_id(provider_id):
+    if not isinstance(provider_id, str):
+        raise ValueError(
+            'Invalid SAML provider ID: {0}. Provider ID must be a non-empty string.'.format(
+                provider_id))
+    if not provider_id.startswith('saml.'):
+        raise ValueError('Invalid SAML provider ID: {0}.'.format(provider_id))
+    return provider_id
+
+
+def _validate_non_empty_string(value, label):
+    """Validates that the given value is a non-empty string."""
+    if not isinstance(value, str):
+        raise ValueError('Invalid type for {0}: {1}.'.format(label, value))
+    if not value:
+        raise ValueError('{0} must not be empty.'.format(label))
+    return value
+
+
+def _validate_url(url, label):
+    """Validates that the given value is a well-formed URL string."""
+    if not isinstance(url, str) or not url:
+        raise ValueError(
+            'Invalid photo URL: "{0}". {1} must be a non-empty '
+            'string.'.format(url, label))
+    try:
+        parsed = parse.urlparse(url)
+        if not parsed.netloc:
+            raise ValueError('Malformed {0}: "{1}".'.format(label, url))
+        return url
+    except Exception:
+        raise ValueError('Malformed {0}: "{1}".'.format(label, url))
+
+
+def _validate_x509_certificates(x509_certificates):
+    if not isinstance(x509_certificates, list) or not x509_certificates:
+        raise ValueError('x509_certificates must be a non-empty list.')
+    if not all([isinstance(cert, str) and cert for cert in x509_certificates]):
+        raise ValueError('x509_certificates must only contain non-empty strings.')
+    return [{'x509Certificate': cert} for cert in x509_certificates]