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[7.7] Switch to the most recent Kibana configuration format and SAML/…
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…OIDC endpoints. (#54625)
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azasypkin authored Apr 2, 2020
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4 changes: 2 additions & 2 deletions docs/reference/settings/security-settings.asciidoc
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Expand Up @@ -1277,8 +1277,8 @@ at the OpenID Connect Provider

`rp.redirect_uri`::
The Redirect URI within {kib}. If you want to use the authorization code flow, this is the
"api/security/v1/oidc" endpoint of your {kib} server. If you want to use the implicit flow, it is the "api/security/v1/oidc/implicit" endpoint.
For example, `https://kibana.example.com/api/security/v1/oidc`.
"api/security/oidc/callback" endpoint of your {kib} server. If you want to use the implicit flow, it is the "api/security/oidc/implicit" endpoint.
For example, `https://kibana.example.com/api/security/oidc/callback`.

`rp.response_type`::
OAuth 2.0 Response Type value that determines the authorization
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Expand Up @@ -65,7 +65,7 @@ an authentication that uses the authorization code grant flow.
--------------------------------------------------
POST /_security/oidc/authenticate
{
"redirect_uri" : "https://oidc-kibana.elastic.co:5603/api/security/v1/oidc?code=jtI3Ntt8v3_XvcLzCFGq&state=4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"redirect_uri" : "https://oidc-kibana.elastic.co:5603/api/security/oidc/callback?code=jtI3Ntt8v3_XvcLzCFGq&state=4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"state" : "4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"nonce" : "WaBPH0KqPVdG5HHdSxPRjfoZbXMCicm5v1OiAj0DUFM",
"realm" : "oidc1"
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39 changes: 18 additions & 21 deletions x-pack/docs/en/security/authentication/oidc-guide.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ RP that you commonly need to provide for registration are the following:
nor the Elastic Stack implementation impose any constraints on this value.
- `Redirect URI`: This is the URI where the OP will redirect the user's browser after authentication. The
appropriate value for this will depend on your setup and whether or not {kib} sits behind a proxy or
load balancer. It will typically be +$\{kibana-url}/api/security/v1/oidc+ (for the authorization code flow) or +$\{kibana-url}/api/security/v1/oidc/implicit+ (for the implicit flow) where _$\{kibana-url}_ is the base URL for your {kib} instance. You might also see this
load balancer. It will typically be +$\{kibana-url}/api/security/oidc/callback+ (for the authorization code flow) or +$\{kibana-url}/api/security/oidc/implicit+ (for the implicit flow) where _$\{kibana-url}_ is the base URL for your {kib} instance. You might also see this
called `Callback URI`.

At the end of the registration process, the OP will assign a Client Identifier and a Client Secret for the RP ({stack}) to use.
Expand Down Expand Up @@ -100,7 +100,7 @@ xpack.security.authc.realms.oidc.oidc1:
order: 2
rp.client_id: "the_client_id"
rp.response_type: code
rp.redirect_uri: "https://kibana.example.org:5601/api/security/v1/oidc"
rp.redirect_uri: "https://kibana.example.org:5601/api/security/oidc/callback"
op.issuer: "https://op.example.org"
op.authorization_endpoint: "https://op.example.org/oauth2/v1/authorize"
op.token_endpoint: "https://op.example.org/oauth2/v1/token"
Expand Down Expand Up @@ -143,7 +143,7 @@ rp.response_type::
rp.redirect_uri::
The redirect URI where the OP will redirect the browser after authentication. This needs to be
_exactly_ the same as the one <<oidc-guide-op, configured with the OP upon registration>> and will
typically be +$\{kibana-url}/api/security/v1/oidc+ where _$\{kibana-url}_ is the base URL for your {kib} instance
typically be +$\{kibana-url}/api/security/oidc/callback+ where _$\{kibana-url}_ is the base URL for your {kib} instance

op.issuer::
A verifiable Identifier for your OpenID Connect Provider. An Issuer Identifier is usually a case sensitive URL.
Expand Down Expand Up @@ -318,7 +318,7 @@ xpack.security.authc.realms.oidc.oidc1:
order: 2
rp.client_id: "the_client_id"
rp.response_type: code
rp.redirect_uri: "https://kibana.example.org:5601/api/security/v1/oidc"
rp.redirect_uri: "https://kibana.example.org:5601/api/security/oidc/callback"
op.authorization_endpoint: "https://op.example.org/oauth2/v1/authorize"
op.token_endpoint: "https://op.example.org/oauth2/v1/token"
op.userinfo_endpoint: "https://op.example.org/oauth2/v1/userinfo"
Expand Down Expand Up @@ -520,41 +520,38 @@ The three additional settings that are required for OpenID Connect support are s

[source, yaml]
------------------------------------------------------------
xpack.security.authc.providers: [oidc]
xpack.security.authc.oidc.realm: "oidc1"
server.xsrf.whitelist: [/api/security/v1/oidc]
xpack.security.authc.providers:
oidc.oidc1:
order: 0
realm: "oidc1"
------------------------------------------------------------

The configuration values used in the example above are:

`xpack.security.authc.providers`::
Set this to `[ oidc ]` to instruct {kib} to use OpenID Connect single sign-on as the
Add `oidc` provider to instruct {kib} to use OpenID Connect single sign-on as the
authentication method. This instructs Kibana to attempt to initiate an SSO flow
everytime a user attempts to access a URL in Kibana, if the user is not already
authenticated. If you also want to allow users to login with a username and password,
you must enable the `basic` authentication provider too. For example:

[source, yaml]
------------------------------------------------------------
xpack.security.authc.providers: [oidc, basic]
xpack.security.authc.providers:
oidc.oidc1:
order: 0
realm: "oidc1"
basic.basic1:
order: 1
------------------------------------------------------------

This will allow users that haven't already authenticated with OpenID Connect to
navigate directly to the `/login` page in {kib} in order to use the login form.
log in using the {kib} login form.

`xpack.security.authc.oidc.realm`::
`xpack.security.authc.providers.oidc.<provider-name>.realm`::
The name of the OpenID Connect realm in {es} that should handle authentication
for this Kibana instance.

`server.xsrf.whitelist`::
{kib} has in-built protection against _Cross Site Request Forgery_ attacks, which
is designed to prevent the {kib} server from processing requests that
originated from outside the {kib} application.
If you use the authorization code flow, {kib} needs to support unsolicited messages that originate from your
OP or a third party (see <<third-party-login>>). In order to do so, you must explicitly _whitelist_ the
OpenID Connect authentication endpoint within {kib}, so that the {kib} server will
not reject these external messages.

[[oidc-without-kibana]]
=== OpenID Connect without {kib}

Expand Down Expand Up @@ -653,7 +650,7 @@ POST /_security/oidc/prepare
-----------------------------------------------------------------------
POST /_security/oidc/authenticate
{
"redirect_uri" : "https://oidc-kibana.elastic.co:5603/api/security/v1/oidc?code=jtI3Ntt8v3_XvcLzCFGq&state=4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"redirect_uri" : "https://oidc-kibana.elastic.co:5603/api/security/oidc/callback?code=jtI3Ntt8v3_XvcLzCFGq&state=4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"state" : "4dbrihtIAt3wBTwo6DxK-vdk-sSyDBV8Yf0AjdkdT5I",
"nonce" : "WaBPH0KqPVdG5HHdSxPRjfoZbXMCicm5v1OiAj0DUFM",
"realm" : "oidc1"
Expand Down
71 changes: 33 additions & 38 deletions x-pack/docs/en/security/authentication/saml-guide.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -365,24 +365,24 @@ in order to assess the level of confidence that it can place in
the corresponding authentication response. The restrictions might have to do
with the authentication method (password, client certificates, etc), the
user identification method during registration, and other details. {es} implements
https://docs.oasis-open.org/security/saml/v2.0/saml-authn-context-2.0-os.pdf[SAML 2.0 Authentication Context], which can be used for this purpose as defined in SAML 2.0 Core
https://docs.oasis-open.org/security/saml/v2.0/saml-authn-context-2.0-os.pdf[SAML 2.0 Authentication Context], which can be used for this purpose as defined in SAML 2.0 Core
Specification.

In short, the SAML SP defines a set of Authentication Context Class Reference
values, which describe the restrictions to be imposed on the IdP, and sends these
in the Authentication Request. The IdP attempts to grant these restrictions.
If it cannot grant them, the authentication attempt fails. If the user is
successfully authenticated, the Authentication Statement of the SAML Response
in the Authentication Request. The IdP attempts to grant these restrictions.
If it cannot grant them, the authentication attempt fails. If the user is
successfully authenticated, the Authentication Statement of the SAML Response
contains an indication of the restrictions that were satisfied.

You can define the Authentication Context Class Reference values by using the `req_authn_context_class_ref` option in the SAML realm configuration. See
<<ref-saml-settings>>.
You can define the Authentication Context Class Reference values by using the `req_authn_context_class_ref` option in the SAML realm configuration. See
<<ref-saml-settings>>.

{es} supports only the `exact` comparison method for the Authentication Context.
When it receives the Authentication Response from the IdP, {es} examines the
{es} supports only the `exact` comparison method for the Authentication Context.
When it receives the Authentication Response from the IdP, {es} examines the
value of the Authentication Context Class Reference that is part of the
Authentication Statement of the SAML Assertion. If it matches one of the
requested values, the authentication is considered successful. Otherwise, the
Authentication Statement of the SAML Assertion. If it matches one of the
requested values, the authentication is considered successful. Otherwise, the
authentication attempt fails.

[[saml-logout]]
Expand Down Expand Up @@ -663,7 +663,7 @@ mapping are derived from the SAML attributes as follows:
- `metadata`: See <<saml-user-metadata>>

For more information, see <<mapping-roles>> and
<<security-role-mapping-apis>>.
<<security-role-mapping-apis>>.

If your IdP has the ability to provide groups or roles to Service Providers,
then you should map this SAML attribute to the `attributes.groups` setting in
Expand Down Expand Up @@ -740,29 +740,22 @@ The three additional settings that are required for SAML support are shown below

[source, yaml]
------------------------------------------------------------
xpack.security.authc.providers: [saml]
xpack.security.authc.saml.realm: saml1
server.xsrf.whitelist: [/api/security/v1/saml]
xpack.security.authc.providers:
saml.saml1:
order: 0
realm: "saml1"
------------------------------------------------------------

The configuration values used in the example above are:

`xpack.security.authc.providers`::
Set this to `[ saml ]` to instruct {kib} to use SAML SSO as the authentication
Add `saml` provider to instruct {kib} to use SAML SSO as the authentication
method.

`xpack.security.authc.saml.realm`::
`xpack.security.authc.providers.saml.<provider-name>.realm`::
Set this to the name of the SAML realm that you have used in your <<saml-create-realm,
Elasticsearch realm configuration>>, for instance: `saml1`

`server.xsrf.whitelist`::
{kib} has in-built protection against _Cross Site Request Forgery_ attacks which
are designed to prevent the {kib} server from processing requests that
originated from outside the {kib} application.
In order to support SAML authentication messages that originate from your
Identity Provider, we need to explicitly _whitelist_ the SAML authentication URL
within {kib}, so that the {kib} server will not reject these external messages.

[[saml-kibana-basic]]
==== Supporting SAML and basic authentication in {kib}

Expand All @@ -774,17 +767,19 @@ example below:

[source, yaml]
------------------------------------------------------------
xpack.security.authc.providers: [saml, basic]
xpack.security.authc.providers:
saml.saml1:
order: 0
realm: "saml1"
basic.basic1:
order: 1
------------------------------------------------------------

The order is important - this will _initiate_ SAML authentication for
unauthenticated users, but will _accept_ basic authentication.

If {kib} is configured in this way, then users who wish to login with a
username and password, can do so by directly accessing the `/login` page in
{kib}. This login will not use SAML credentials, and will rely on one of the
other security realms within {es}. Only users who have a username and password
for a configured {es} authentication realm will be able to login via this page.
If {kib} is configured in this way, users are presented with a choice
at the Login Selector UI. They log in with SAML or they provide a username and password and rely on one
of the other security realms within {es}. Only users who have
a username and password for a configured {es} authentication realm can
log in via {kib} login form.

Alternatively, when the `basic` authentication provider is enabled, you can
place a reverse proxy in front of {kib}, and configure it to send a basic
Expand Down Expand Up @@ -871,7 +866,7 @@ an {es} access token and a refresh token. The access token is used as credential
for subsequent calls to {es}. The refresh token enables the user to get new {es}
access tokens after the current one expires.

[[saml-no-kibana-realm]]]
[[saml-no-kibana-realm]]
==== SAML realm

You must create a SAML realm and configure it accordingly
Expand Down Expand Up @@ -930,7 +925,7 @@ POST /_security/saml/prepare
. Handle the response from `/_security/saml/prepare`. The response from {es} will contain 3 parameters:
`redirect`, `realm` and `id`. The custom web application would need to store the value for `id`
in the user's session (client side in a cookie or server side if session information is
persisted this way). It must also redirect the user's browser to the URL that was returned in the
persisted this way). It must also redirect the user's browser to the URL that was returned in the
`redirect` parameter. The `id` value should not be disregarded as it is used as a nonce in SAML in
order to mitigate against replay attacks.
. Handle a subsequent response from the SAML IdP. After the user is successfully authenticated with the
Expand Down Expand Up @@ -999,10 +994,10 @@ POST /_security/saml/logout
If the SAML realm is configured accordingly and the IdP supports it (see <<saml-logout>>), this request will trigger a SAML
SP-initiated Single Logout. In this case, the response will include a `redirect`
parameter indicating where the user needs to be redirected at the IdP in order to complete the logout.
. Alternatively, the IdP might initiate the Single Logout flow at some point. In order to handle this,
. Alternatively, the IdP might initiate the Single Logout flow at some point. In order to handle this,
the Logout URL (`sp.logout`) needs to be handled by the custom web app. The query part of the URL that the
user will be redirected to will contain a SAML Logout request and this query part needs to be relayed to {es}
using the <<security-api-saml-invalidate,SAML invalidate API>>
using the <<security-api-saml-invalidate,SAML invalidate API>>
+
[source,console]
--------------------------------------------------
Expand All @@ -1016,4 +1011,4 @@ POST /_security/saml/invalidate
+
The custom web application will then need to also handle the response, which will include a `redirect`
parameter with a URL in the IdP that contains the SAML Logout response. The application should redirect the user
there to complete the logout.
there to complete the logout.
16 changes: 9 additions & 7 deletions x-pack/docs/en/security/troubleshooting.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -451,13 +451,15 @@ assertionConsumerServiceURL=https://my.kibana.url/api/security/v1/saml}]

In order to initiate a SAML authentication, {kib} needs to know which SAML realm
it should use from the ones that are configured in {es}. You can use the
`xpack.security.authc.saml.reaml` setting to explicitly set the SAML realm name
in {kib}. It must match the name of the SAML realm that is configured in {es}.

If you get an error like the one above, it possibly means that the value of
`xpack.security.authc.saml.reaml` in your {kib} configuration is wrong. Verify
that it matches the name of the configured realm in {es}, which is the string
after `xpack.security.authc.realms.saml.` in your {es} configuration.
`xpack.security.authc.providers.saml.<provider-name>.realm` setting to explicitly
set the SAML realm name in {kib}. It must match the name of the SAML realm that is
configured in {es}.

If you get an error like the one above, it possibly means that the value of
`xpack.security.authc.providers.saml.<provider-name>.realm` in your {kib}
configuration is wrong. Verify that it matches the name of the configured realm
in {es}, which is the string after `xpack.security.authc.realms.saml.` in your
{es} configuration.

--

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