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[WIP]: CNTRLPLANE-311: adding auth config missing fields to API #2487

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[WIP]: CNTRLPLANE-311: adding auth config missing fields to API #2487

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9da6c1f
adding auth config missing fields
ShazaAldawamneh Sep 19, 2025
8e0ef94
adding auth config missing fields
ShazaAldawamneh Sep 23, 2025
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563 changes: 563 additions & 0 deletions config/v1/tests/authentications.config.openshift.io/ExternalOIDCWithNewAuthConfigFields.yaml
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137 changes: 123 additions & 14 deletions config/v1/types_authentication.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ import metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
// +genclient
// +genclient:nonNamespaced
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
// +openshift:validation:FeatureGateAwareXValidation:featureGate=ExternalOIDC;ExternalOIDCWithUIDAndExtraClaimMappings,rule="!has(self.spec.oidcProviders) || self.spec.oidcProviders.all(p, !has(p.oidcClients) || p.oidcClients.all(specC, self.status.oidcClients.exists(statusC, statusC.componentNamespace == specC.componentNamespace && statusC.componentName == specC.componentName) || (has(oldSelf.spec.oidcProviders) && oldSelf.spec.oidcProviders.exists(oldP, oldP.name == p.name && has(oldP.oidcClients) && oldP.oidcClients.exists(oldC, oldC.componentNamespace == specC.componentNamespace && oldC.componentName == specC.componentName)))))",message="all oidcClients in the oidcProviders must match their componentName and componentNamespace to either a previously configured oidcClient or they must exist in the status.oidcClients"
// +openshift:validation:FeatureGateAwareXValidation:featureGate=ExternalOIDC;ExternalOIDCWithUIDAndExtraClaimMappings;ExternalOIDCWithNewAuthConfigFields,rule="!has(self.spec.oidcProviders) || self.spec.oidcProviders.all(p, !has(p.oidcClients) || p.oidcClients.all(specC, self.status.oidcClients.exists(statusC, statusC.componentNamespace == specC.componentNamespace && statusC.componentName == specC.componentName) || (has(oldSelf.spec.oidcProviders) && oldSelf.spec.oidcProviders.exists(oldP, oldP.name == p.name && has(oldP.oidcClients) && oldP.oidcClients.exists(oldC, oldC.componentNamespace == specC.componentNamespace && oldC.componentName == specC.componentName)))))",message="all oidcClients in the oidcProviders must match their componentName and componentNamespace to either a previously configured oidcClient or they must exist in the status.oidcClients"

// Authentication specifies cluster-wide settings for authentication (like OAuth and
// webhook token authenticators). The canonical name of an instance is `cluster`.
Expand Down Expand Up @@ -91,6 +91,7 @@ type AuthenticationSpec struct {
// +kubebuilder:validation:MaxItems=1
// +openshift:enable:FeatureGate=ExternalOIDC
// +openshift:enable:FeatureGate=ExternalOIDCWithUIDAndExtraClaimMappings
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
// +optional
OIDCProviders []OIDCProvider `json:"oidcProviders,omitempty"`
}
Expand Down Expand Up @@ -243,11 +244,23 @@ type OIDCProvider struct {
// +listType=atomic
// +optional
ClaimValidationRules []TokenClaimValidationRule `json:"claimValidationRules,omitempty"`

// userValidationRules defines the set of rules used to validate claims in a user’s token.
// These rules determine whether a token subject is considered valid based on its claims.
// Each rule is evaluated independently.
// See the TokenUserValidationRule type for more information on rule structure.

// +listType=atomic
// +kubebuilder:validation:MaxItems=64
// +optional
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
UserValidationRules []TokenUserValidationRule `json:"userValidationRules,omitempty"`
}

// +kubebuilder:validation:MinLength=1
type TokenAudience string

// +openshift:validation:FeatureGateAwareXValidation:featureGate=ExternalOIDCWithNewAuthConfigFields,rule="self.?discoveryURL.orValue(\"\").size() > 0 ? (self.issuerURL.size() == 0 || self.discoveryURL.find('^.+[^/]') != self.issuerURL.find('^.+[^/]')) : true",message="discoveryURL must be different from issuerURL"
type TokenIssuer struct {
// issuerURL is a required field that configures the URL used to issue tokens
// by the identity provider.
Expand Down Expand Up @@ -291,8 +304,46 @@ type TokenIssuer struct {
//
// +optional
CertificateAuthority ConfigMapNameReference `json:"issuerCertificateAuthority"`
// discoveryURL is an optional field that, if specified, overrides the default discovery endpoint
// used to retrieve OIDC configuration metadata. By default, the discovery URL is derived from `url`
// as "{url}/.well-known/openid-configuration".
//
// The discoveryURL must:
// - Be a valid absolute URL.
// - Use the HTTPS scheme.
// - Not contain query parameters, user info, or fragments.
// - Be different from the value of `url` (ignoring trailing slashes)
//
// +optional
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
// +kubebuilder:validation:XValidation:rule="self.size() > 0 ? isURL(self) : true",message="discoveryURL must be a valid URL"
// +kubebuilder:validation:XValidation:rule="self.size() > 0 ? (isURL(self) && url(self).getScheme() == 'https') : true",message="discoveryURL must be a valid https URL"
// +kubebuilder:validation:XValidation:rule="self.matches('^[^?]*$')",message="discoveryURL must not contain query parameters"
// +kubebuilder:validation:XValidation:rule="self.matches('^[^#]*$')",message="discoveryURL must not contain fragments"
// +kubebuilder:validation:XValidation:rule="self.matches('^[^@]*$')",message="discoveryURL must not contain user info"
// +kubebuilder:validation:MaxLength=2048
DiscoveryURL *string `json:"discoveryURL,omitempty"`

// audienceMatchPolicy specifies how token audiences are matched.
// If omitted, the system applies a default policy.
// Valid values are:
// - "MatchAny": The token is accepted if any of its audiences match any of the configured audiences.
//
// +optional
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
AudienceMatchPolicy *AudienceMatchPolicy `json:"audienceMatchPolicy,omitempty"`
}

// AudienceMatchPolicyType is a set of valid values for Issuer.AudienceMatchPolicy.
//
// +kubebuilder:validation:Enum=MatchAny;""
type AudienceMatchPolicy string

// Valid types for AudienceMatchPolicyType
const (
AudienceMatchPolicyMatchAny AudienceMatchPolicy = "MatchAny"
)

type TokenClaimMappings struct {
// username is a required field that configures how the username of a cluster identity
// should be constructed from the claims in a JWT token issued by the identity provider.
Expand Down Expand Up @@ -717,15 +768,23 @@ type PrefixedClaimMapping struct {
Prefix string `json:"prefix"`
}

// TokenValidationRuleType represents the different
// claim validation rule types that can be configured.
// +enum
// TokenValidationRuleType defines the type of token validation rule.
//
// +kubebuilder:validation:Enum=RequiredClaim;Expression
type TokenValidationRuleType string

const (
TokenValidationRuleTypeRequiredClaim = "RequiredClaim"
TokenValidationRuleRequiredClaim = "RequiredClaim"
TokenValidationRuleExpression = "Expression"
)

// TokenClaimValidationRule represents a validation rule based on token claims.
// If type is RequiredClaim, requiredClaim must be set.
// If type is Expression, expressionRule must be set.
//
// +kubebuilder:validation:XValidation:rule="has(self.type) && self.type == 'RequiredClaim' ? has(self.requiredClaim) : !has(self.requiredClaim)",message="requiredClaim must be set when type is 'RequiredClaim', and forbidden otherwise"
// +openshift:validation:FeatureGateAwareXValidation:featureGate=ExternalOIDCWithNewAuthConfigFields,rule="has(self.type) && self.type == 'Expression' ? has(self.expressionRule) : !has(self.expressionRule)",message="expressionRule must be set when type is 'Expression', and forbidden otherwise"

type TokenClaimValidationRule struct {
// type is an optional field that configures the type of the validation rule.
//
Expand All @@ -738,23 +797,23 @@ type TokenClaimValidationRule struct {
//
// Defaults to 'RequiredClaim'.
//
// +kubebuilder:validation:Enum={"RequiredClaim"}
// +kubebuilder:default="RequiredClaim"
Type TokenValidationRuleType `json:"type"`

// requiredClaim is an optional field that configures the required claim
// and value that the Kubernetes API server will use to validate if an incoming
// JWT is valid for this identity provider.
//
// requiredClaim allows configuring a required claim name and its expected value.
// RequiredClaim is used when type is RequiredClaim.
// +optional
RequiredClaim *TokenRequiredClaim `json:"requiredClaim,omitempty"`

// expressionRule contains the configuration for the "Expression" type.
// Must be set if type == "Expression".
//
// +optional
ExpressionRule *TokenExpressionRule `json:"expressionRule,omitempty"`
}

type TokenRequiredClaim struct {
// claim is a required field that configures the name of the required claim.
// When taken from the JWT claims, claim must be a string value.
//
// claim must not be an empty string ("").
// claim is a name of a required claim. Only claims with string values are supported.
//
// +kubebuilder:validation:MinLength=1
// +required
Expand All @@ -771,3 +830,53 @@ type TokenRequiredClaim struct {
// +required
RequiredValue string `json:"requiredValue"`
}

type TokenExpressionRule struct {
// expression is a CEL expression evaluated against token claims.
// The expression must be a non-empty string and no longer than 4096 characters.
// This field is required.
//
// +kubebuilder:validation:MinLength=1
// +kubebuilder:validation:MaxLength=4096
// +required
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
Expression string `json:"expression,omitempty"`

// message allows configuring the human-readable message that is returned
// from the Kubernetes API server when a token fails validation based on
// the CEL expression defined in 'expression'. This field is optional.
//
// +optional
// +kubebuilder:validation:MinLength=1
// +kubebuilder:validation:MaxLength=256
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
Message string `json:"message,omitempty"`
}

// TokenUserValidationRule provides a CEL-based rule used to validate a token subject.
// Each rule contains a CEL expression that is evaluated against the token’s claims.
type TokenUserValidationRule struct {
// expression is a CEL expression that must evaluate
// to true for the token to be accepted. The expression is evaluated against the token's
// user information (e.g., username, groups).
//
// If the expression evaluates to false, the token is rejected.
// See https://kubernetes.io/docs/reference/using-api/cel/ for CEL syntax.
// At least one rule must evaluate to true for the token to be considered valid.
//
// This field must be non-empty and may not exceed 4096 characters.
//
// +required
// +kubebuilder:validation:MinLength=1
// +kubebuilder:validation:MaxLength=4096
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
Expression string `json:"expression,omitempty"`
// message is an optional, human-readable message returned by the API server when
// this validation rule fails. It can help clarify why a token was rejected.
//
// +optional
// +kubebuilder:validation:MinLength=1
// +kubebuilder:validation:MaxLength=256
// +openshift:enable:FeatureGate=ExternalOIDCWithNewAuthConfigFields
Message string `json:"message,omitempty"`
}
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