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Add APIs for multiple IDP and id transformations to FederationDomain CRD

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This commit is contained in:
Ryan Richard
2023-02-15 12:08:41 -08:00
parent fee737b267
commit be11966a64
28 changed files with 5047 additions and 120 deletions
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261
deploy/supervisor/config.supervisor.pinniped.dev_federationdomains.yaml
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@@ -47,6 +47,263 @@ spec:
spec:
description: Spec of the OIDC provider.
properties:
identityProviders:
description: "IdentityProviders is the list of identity providers
available for use by this FederationDomain. \n An identity provider
CR (e.g. OIDCIdentityProvider or LDAPIdentityProvider) describes
how to connect to a server, how to talk in a specific protocol for
authentication, and how to use the schema of that server/protocol
to extract a normalized user identity. Normalized user identities
include a username and a list of group names. In contrast, IdentityProviders
describes how to use that normalized identity in those Kubernetes
clusters which belong to this FederationDomain. Each entry in IdentityProviders
can be configured with arbitrary transformations on that normalized
identity. For example, a transformation can add a prefix to all
usernames to help avoid accidental conflicts when multiple identity
providers have different users with the same username (e.g. \"idp1:ryan\"
versus \"idp2:ryan\"). Each entry in IdentityProviders can also
implement arbitrary authentication rejection policies. Even though
a user was able to authenticate with the identity provider, a policy
can disallow the authentication to the Kubernetes clusters that
belong to this FederationDomain. For example, a policy could disallow
the authentication unless the user belongs to a specific group in
the identity provider. \n For backwards compatibility with versions
of Pinniped which predate support for multiple identity providers,
an empty IdentityProviders list will cause the FederationDomain
to use all available identity providers which exist in the same
namespace, but also to reject all authentication requests when there
is more than one identity provider currently defined. In this backwards
compatibility mode, the name of the identity provider resource (e.g.
the Name of an OIDCIdentityProvider resource) will be used as the
name of the identity provider in this FederationDomain. This mode
is provided to make upgrading from older versions easier. However,
instead of relying on this backwards compatibility mode, please
consider this mode to be deprecated and please instead explicitly
list the identity provider using this IdentityProviders field."
items:
description: FederationDomainIdentityProvider describes how an identity
provider is made available in this FederationDomain.
properties:
displayName:
description: DisplayName is the name of this identity provider
as it will appear to clients. This name ends up in the kubeconfig
of end users, so changing the name of an identity provider
that is in use by end users will be a disruptive change for
those users.
minLength: 1
type: string
objectRef:
description: ObjectRef is a reference to a Pinniped identity
provider resource. A valid reference is required. If the reference
cannot be resolved then the identity provider will not be
made available. Must refer to a resource of one of the Pinniped
identity provider types, e.g. OIDCIdentityProvider, LDAPIdentityProvider,
ActiveDirectoryIdentityProvider.
properties:
apiGroup:
description: APIGroup is the group for the resource being
referenced. If APIGroup is not specified, the specified
Kind must be in the core API group. For any other third-party
types, APIGroup is required.
type: string
kind:
description: Kind is the type of resource being referenced
type: string
name:
description: Name is the name of resource being referenced
type: string
required:
- kind
- name
type: object
transforms:
description: Transforms is an optional way to specify transformations
to be applied during user authentication and session refresh.
properties:
constants:
description: Constants defines constant variables and their
values which will be made available to the transform expressions.
items:
description: FederationDomainTransformsConstant defines
a constant variable and its value which will be made
available to the transform expressions. This is a union
type, and Type is the discriminator field.
properties:
name:
description: Name determines the name of the constant.
It must be a valid identifier name.
maxLength: 64
minLength: 1
pattern: ^[a-zA-Z][_a-zA-Z0-9]*$
type: string
stringListValue:
description: StringListValue should hold the value
when Type is "stringList", and is otherwise ignored.
items:
type: string
type: array
stringValue:
description: StringValue should hold the value when
Type is "string", and is otherwise ignored.
type: string
type:
description: Type determines the type of the constant,
and indicates which other field should be non-empty.
enum:
- string
- stringList
type: string
required:
- name
- type
type: object
type: array
x-kubernetes-list-map-keys:
- name
x-kubernetes-list-type: map
examples:
description: Examples can optionally be used to ensure that
the sequence of transformation expressions are working
as expected. Examples define sample input identities which
are then run through the expression list, and the results
are compared to the expected results. If any example in
this list fails, then this identity provider will not
be available for use within this FederationDomain, and
the error(s) will be added to the FederationDomain status.
This can be used to help guard against programming mistakes
in the expressions, and also act as living documentation
for other administrators to better understand the expressions.
items:
description: FederationDomainTransformsExample defines
a transform example.
properties:
expects:
description: Expects is the expected output of the
entire sequence of transforms when they are run
against the input Username and Groups.
properties:
groups:
description: Groups is the expected list of group
names after the transformations have been applied.
items:
type: string
type: array
message:
description: Message is the expected error message
of the transforms. When Rejected is true, then
Message is the expected message for the policy
which rejected the authentication attempt. When
Rejected is true and Message is blank, then
Message will be treated as the default error
message for authentication attempts which are
rejected by a policy. When Rejected is false,
then Message is the expected error message for
some other non-policy transformation error,
such as a runtime error. When Rejected is false,
there is no default expected Message.
type: string
rejected:
description: Rejected is a boolean that indicates
whether authentication is expected to be rejected
by a policy expression after the transformations
have been applied. True means that it is expected
that the authentication would be rejected. The
default value of false means that it is expected
that the authentication would not be rejected
by any policy expression.
type: boolean
username:
description: Username is the expected username
after the transformations have been applied.
type: string
type: object
groups:
description: Groups is the input list of group names.
items:
type: string
type: array
username:
description: Username is the input username.
minLength: 1
type: string
required:
- expects
- username
type: object
type: array
expressions:
description: "Expressions are an optional list of transforms
and policies to be executed in the order given during
every authentication attempt, including during every session
refresh. Each is a CEL expression. It may use the basic
CEL language as defined in https://github.com/google/cel-spec/blob/master/doc/langdef.md
plus the CEL string extensions defined in https://github.com/google/cel-go/tree/master/ext#strings.
\n The username and groups extracted from the identity
provider, and the constants defined in this CR, are available
as variables in all expressions. The username is provided
via a variable called `username` and the list of group
names is provided via a variable called `groups` (which
may be an empty list). Each user-provided constants is
provided via a variable named `strConst.varName` for string
constants and `strListConst.varName` for string list constants.
\n The only allowed types for expressions are currently
policy/v1, username/v1, and groups/v1. Each policy/v1
must return a boolean, and when it returns false, no more
expressions from the list are evaluated and the authentication
attempt is rejected. Transformations of type policy/v1
do not return usernames or group names, and therefore
cannot change the username or group names. Each username/v1
transform must return the new username (a string), which
can be the same as the old username. Transformations of
type username/v1 do not return group names, and therefore
cannot change the group names. Each groups/v1 transform
must return the new groups list (list of strings), which
can be the same as the old groups list. Transformations
of type groups/v1 do not return usernames, and therefore
cannot change the usernames. After each expression, the
new (potentially changed) username or groups get passed
to the following expression. \n Any compilation or static
type-checking failure of any expression will cause an
error status on the FederationDomain. During an authentication
attempt, any unexpected runtime evaluation errors (e.g.
division by zero) cause the authentication attempt to
fail. When all expressions evaluate successfully, then
the (potentially changed) username and group names have
been decided for that authentication attempt."
items:
description: FederationDomainTransformsExpression defines
a transform expression.
properties:
expression:
description: Expression is a CEL expression that will
be evaluated based on the Type during an authentication.
minLength: 1
type: string
message:
description: Message is only used when Type is policy/v1.
It defines an error message to be used when the
policy rejects an authentication attempt. When empty,
a default message will be used.
type: string
type:
description: Type determines the type of the expression.
It must be one of the supported types.
enum:
- policy/v1
- username/v1
- groups/v1
type: string
required:
- expression
- type
type: object
type: array
type: object
required:
- displayName
- objectRef
type: object
type: array
issuer:
description: "Issuer is the OIDC Provider's issuer, per the OIDC Discovery
Metadata document, as well as the identifier that it will use for
@@ -59,8 +316,8 @@ spec:
minLength: 1
type: string
tls:
description: TLS configures how this FederationDomain is served over
Transport Layer Security (TLS).
description: TLS specifies a secret which will contain Transport Layer
Security (TLS) configuration for the FederationDomain.
properties:
secretName:
description: "SecretName is an optional name of a Secret in the