openstack/keystone
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b039ad331fb682e505d172fd98db5f1b63799214
keystone/api-ref/source/v3/authenticate-v3.inc
Lance Bragstad 75da4da476 Clarify scope responses in authentication api ref 
The documentation was a bit misleading because it listed projects,
domains, and the system as not being optional. This is confusing
because it's not possible to scope a token to more than one target.

This commit attempts to clarify those details.

Closes-Bug: 1774229
Change-Id: I27fb15e2b53529b91c0f2bd3a2744d60b54495c8
2018-06-07 16:51:01 +00:00

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.. -*- rst -*-
=====================================
Authentication and token management
=====================================
The Identity service generates tokens in exchange for authentication
credentials. A token represents the authenticated identity of a user and,
optionally, grants authorization on a specific project, domain, or the
deployment system.
The body of an authentication request must include a payload that
specifies the authentication method, which is ``password`` or
``token``, the credentials, and, optionally, the authorization
scope. You can scope a token to a project, domain, the deployment system, or
the token can be unscoped. You cannot scope a token to multiple scope targets.
Tokens have IDs, which the Identity API returns in the
``X-Subject-Token`` response header.
After you obtain an authentication token, you can:
- Make REST API requests to other OpenStack services. You supply the
ID of your authentication token in the ``X-Auth-Token`` request
header.
- Validate your authentication token and list the domains, projects,
roles, and endpoints that your token gives you access to.
- Use your token to request another token scoped for a different
domain and project.
- Force the immediate revocation of a token.
- List revoked public key infrastructure (PKI) tokens.
In v3.7 of the Identity API service, two new configuration options
were added: ``[resource] admin_project_name`` and
``[resource] admin_project_domain_name``. The options represent the
project that only the cloud administrator should be able to access.
When an authentication request for a token scoped to the admin project
is processed, it will have an additional field in the token
``{is_admin_project: True}``. The additional field can be used when
writing policy rules that evaluate access control to APIs.
Alternatively, in v3.10 the Identity API service introduced the concept of
system role assignments and system-scoped tokens. APIs that affect the
deployment system require system-scoped tokens.
The Identity API considers expired tokens as invalid, which is determined by
the deployment's configuration.
These authentication errors can occur:
**Authentication errors**
+------------------------+----------------------------------------------------------------------+
| Response code | Description |
+------------------------+----------------------------------------------------------------------+
| ``Bad Request (400)`` | The Identity service failed to parse the request as expected. One |
| | of the following errors occurred: |
| | |
| | - A required attribute was missing. |
| | |
| | - An attribute that is not allowed was specified, such as an ID on a |
| | POST request in a basic CRUD operation. |
| | |
| | - An attribute of an unexpected data type was specified. |
+------------------------+----------------------------------------------------------------------+
| ``Unauthorized (401)`` | One of the following errors occurred: |
| | |
| | - Authentication was not performed. |
| | |
| | - The specified ``X-Auth-Token`` header is not valid. |
| | |
| | - The authentication credentials are not valid. |
+------------------------+----------------------------------------------------------------------+
| ``Forbidden (403)`` | The identity was successfully authenticated but it is not |
| | authorized to perform the requested action. |
+------------------------+----------------------------------------------------------------------+
| ``Not Found (404)`` | An operation failed because a referenced entity cannot be found by |
| | ID. For a POST request, the referenced entity might be specified in |
| | the request body rather than in the resource path. |
+------------------------+----------------------------------------------------------------------+
| ``Conflict (409)`` | A POST or PATCH operation failed. For example, a client tried to |
| | update a unique attribute for an entity, which conflicts with that |
| | of another entity in the same collection. |
| | |
| | Or, a client issued a create operation twice on a collection with a |
| | user-defined, unique attribute. For example, a client made a POST |
| | ``/users`` request two times for the unique, user-defined name |
| | attribute for a user entity. |
+------------------------+----------------------------------------------------------------------+
Password authentication with unscoped authorization
===================================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token. Uses the password authentication method. Authorization is unscoped.
The request body must include a payload that specifies the
authentication method, which is ``password``, and the user, by ID
or name, and password credentials.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- domain: domain
- name: user_name
- auth: auth
- user: user
- password: password
- id: user_id
- identity: identity
- methods: auth_methods_passwd
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-password-unscoped-request-with-domain.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
- domain: domain
- methods: auth_methods_passwd
- expires_at: expires_at
- token: token
- user: user
- audit_ids: audit_ids
- issued_at: issued_at
- id: user_id
- name: user_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-password-unscoped-response.json
:language: javascript
Password authentication with scoped authorization
=================================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token. Uses the password
authentication method and scopes authorization to a project, domain, or the
system.
The request body must include a payload that specifies the ``password``
authentication method which includes the credentials in addition to a
``project``, ``domain``, or ``system`` authorization scope.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- name: user_name
- auth: auth
- user: user
- scope: scope_string
- password: password
- id: user_id
- identity: identity
- methods: auth_methods_passwd
System-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/system-password.json
:language: javascript
Domain-Scoped with Domain ID Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/domain-id-password.json
:language: javascript
Domain-Scoped with Domain Name Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/domain-name-password.json
:language: javascript
Project-Scoped with Project ID Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/project-id-password.json
:language: javascript
Project-Scoped with Project Name Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/project-name-password.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
- region_id: region_id_required
- methods: auth_methods_passwd
- roles: roles
- url: endpoint_url
- region: endpoint_region
- token: token
- expires_at: expires_at
- system: system_scope_response_body_optional
- domain: domain_scope_response_body_optional
- project: project_scope_response_body_optional
- issued_at: issued_at
- catalog: catalog
- user: user
- audit_ids: audit_ids
- interface: endpoint_interface
- endpoints: endpoints
- type: endpoint_type
- id: user_id
- name: user_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
System-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/system-scoped-password.json
:language: javascript
Domain-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/domain-scoped-password.json
:language: javascript
Project-Scoped Example
~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/project-scoped-password.json
:language: javascript
Password authentication with explicit unscoped authorization
============================================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token. Uses the password authentication method with explicit unscoped authorization.
The request body must include a payload that specifies the
``password`` authentication method, the credentials, and the
``unscoped`` authorization scope.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- name: user_name
- auth: auth
- user: user
- scope: explicit_unscoped_string
- password: password
- id: user_id
- identity: identity
- methods: auth_methods_passwd
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-password-explicit-unscoped-request.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
- domain: domain
- methods: auth_methods_passwd
- roles: roles
- expires_at: expires_at
- token: token
- user: user
- audit_ids: audit_ids
- issued_at: issued_at
- id: user_id
- name: user_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-password-explicit-unscoped-response.json
:language: javascript
Token authentication with unscoped authorization
================================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token. Uses the token authentication method. Authorization is unscoped.
In the request body, provide the token ID.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- identity: identity
- token: auth_token
- id: auth_token_id
- auth: auth
- methods: auth_methods_token
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-token-unscoped-request.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-token-unscoped-response.json
:language: javascript
Token authentication with scoped authorization
==============================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token. Uses the token authentication
method and scopes authorization to a project, domain, or the system.
The request body must include a payload that specifies the ``token``
authentication method which includes the token in addition to a ``project``,
``domain``, or ``system`` authorization scope.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- methods: auth_methods_token
- auth: auth
- token: auth_token
- audit_ids: audit_ids
- scope: scope_string
- id: auth_token_id
- identity: identity
System-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/system-token.json
:language: javascript
Domain-Scoped with Domain ID Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/domain-id-token.json
:language: javascript
Domain-Scoped with Domain Name Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/domain-name-token.json
:language: javascript
Project-Scoped with Project ID Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/project-id-token.json
:language: javascript
Project-Scoped with Project Name Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/requests/project-name-token.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
- region_id: region_id_required
- methods: auth_methods_passwd
- roles: roles
- url: endpoint_url
- region: endpoint_region
- token: token
- expires_at: expires_at
- system: system_scope_response_body_optional
- domain: domain_scope_response_body_optional
- project: project_scope_response_body_optional
- issued_at: issued_at
- catalog: catalog
- user: user
- audit_ids: audit_ids
- interface: endpoint_interface
- endpoints: endpoints
- type: endpoint_type
- id: user_id
- name: user_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
System-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/system-scoped-token.json
:language: javascript
Domain-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/domain-scoped-token.json
:language: javascript
Project-Scoped Example
~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/project-scoped-token.json
:language: javascript
Token authentication with explicit unscoped authorization
=========================================================
.. rest_method:: POST /v3/auth/tokens
Authenticates an identity and generates a token.
Uses the token authentication method with explicit unscoped authorization.
In the request body, provide the token ID and the
``unscoped`` authorization scope.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- nocatalog: nocatalog
- methods: auth_methods_token
- auth: auth
- token: auth_token
- audit_ids: audit_ids
- scope: explicit_unscoped_string
- id: auth_token_id
- identity: identity
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-token-explicit-unscoped-request.json
:language: javascript
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/auth-token-unscoped-response.json
:language: javascript
Validate and show information for token
=======================================
.. rest_method:: GET /v3/auth/tokens
Validates and shows information for a token, including its expiration date and authorization scope.
Pass your own token in the ``X-Auth-Token`` request header.
Pass the token that you want to validate in the ``X-Subject-Token``
request header.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
- X-Subject-Token: X-Subject-Token
- nocatalog: nocatalog
- allow_expired: allow_expired
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Subject-Token: X-Subject-Token
- methods: auth_methods
- links: domain_link_response_body
- user: user
- token: token
- expires_at: expires_at
- catalog: catalog_response_body_optional
- system: system_scope_response_body_optional
- domain: domain_scope_response_body_optional
- project: project_scope_response_body_optional
- roles: roles
- audit_ids: audit_ids
- issued_at: issued_at
- id: user_id
- name: user_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 413
- 503
Unscoped Example
~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/unscoped-password.json
:language: javascript
System-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/system-scoped-password.json
:language: javascript
Domain-Scoped Example
~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/domain-scoped-password.json
:language: javascript
Project-Scoped Example
~~~~~~~~~~~~~~~~~~~~~~
.. literalinclude:: ./samples/auth/responses/project-scoped-password.json
:language: javascript
Check token
===========
.. rest_method:: HEAD /v3/auth/tokens
Validates a token.
This call is similar to ``GET /auth/tokens`` but no response body
is provided even in the ``X-Subject-Token`` header.
The Identity API returns the same response as when the subject
token was issued by ``POST /auth/tokens`` even if an error occurs
because the token is not valid. An HTTP ``204`` response code
indicates that the ``X-Subject-Token`` is valid.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
- X-Subject-Token: X-Subject-Token
- allow_expired: allow_expired
Response
--------
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 413
- 503
Revoke token
============
.. rest_method:: DELETE /v3/auth/tokens
Revokes a token.
This call is similar to the HEAD ``/auth/tokens`` call except that
the ``X-Subject-Token`` token is immediately not valid, regardless
of the ``expires_at`` attribute value. An additional
``X-Auth-Token`` is not required.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_tokens``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
- X-Subject-Token: X-Subject-Token
Response
--------
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 201
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Get service catalog
===================
.. rest_method:: GET /v3/auth/catalog
New in version 3.3
This call returns a service catalog for the X-Auth-Token provided in the
request, even if the token does not contain a catalog itself (for example,
if it was generated using ?nocatalog).
The structure of the catalog object is identical to that contained in a token.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_catalog``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- endpoints: endpoints
- id: service_id
- type: service_type
- name: service_name
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/get-service-catalog-response.json
:language: javascript
Get available project scopes
============================
.. rest_method:: GET /v3/auth/projects
New in version 3.3
This call returns the list of projects that are available to be scoped
to based on the X-Auth-Token provided in the request.
The structure of the response is exactly the same as listing projects
for a user.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_projects``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- domain_id: project_domain_id_response_body
- enabled: project_enabled_response_body
- id: project_id
- links: links_project
- name: project_name_response_body
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/get-available-project-scopes-response.json
:language: javascript
Get available domain scopes
===========================
.. rest_method:: GET /v3/auth/domains
New in version 3.3
This call returns the list of domains that are available to be scoped
to based on the X-Auth-Token provided in the request.
The structure is the same as listing domains.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_domains``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- description: domain_description_response_body
- enabled: domain_enabled_response_body
- id: domain_id_response_body
- links: domain_link_response_body
- name: domain_name_response_body
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 405
- 409
- 413
- 415
- 503
Example
~~~~~~~
.. literalinclude:: ./samples/admin/get-available-domain-scopes-response.json
:language: javascript
Get available system scopes
===========================
.. rest_method:: GET /v3/auth/system
New in version 3.10
This call returns the list of systems that are available to be scoped
to based on the X-Auth-Token provided in the request.
Relationship: ``https://docs.openstack.org/api/openstack-identity/3/rel/auth_system``
Request
-------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- X-Auth-Token: X-Auth-Token
Response
--------
Parameters
~~~~~~~~~~
.. rest_parameters:: parameters.yaml
- links: domain_link_response_body
- system: response_body_system_required
Status Codes
~~~~~~~~~~~~
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 401
- 400
Example
~~~~~~~
.. literalinclude:: ./samples/admin/get-available-system-scopes-response.json
:language: javascript
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