rebase: update k8s.io packages to v0.29.0

Signed-off-by: Niels de Vos <ndevos@ibm.com>

vendor/k8s.io/apiserver/pkg/authentication/cel/mapper.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+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.
+*/
+
+package cel
+
+import (
+	"context"
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+)
+
+var _ ClaimsMapper = &mapper{}
+var _ UserMapper = &mapper{}
+
+// mapper implements the ClaimsMapper and UserMapper interface.
+type mapper struct {
+	compilationResults []CompilationResult
+}
+
+// CELMapper is a struct that holds the compiled expressions for
+// username, groups, uid, extra, claimValidation and userValidation
+type CELMapper struct {
+	Username             ClaimsMapper
+	Groups               ClaimsMapper
+	UID                  ClaimsMapper
+	Extra                ClaimsMapper
+	ClaimValidationRules ClaimsMapper
+	UserValidationRules  UserMapper
+}
+
+// NewClaimsMapper returns a new ClaimsMapper.
+func NewClaimsMapper(compilationResults []CompilationResult) ClaimsMapper {
+	return &mapper{
+		compilationResults: compilationResults,
+	}
+}
+
+// NewUserMapper returns a new UserMapper.
+func NewUserMapper(compilationResults []CompilationResult) UserMapper {
+	return &mapper{
+		compilationResults: compilationResults,
+	}
+}
+
+// EvalClaimMapping evaluates the given claim mapping expression and returns a EvaluationResult.
+func (m *mapper) EvalClaimMapping(ctx context.Context, claims *unstructured.Unstructured) (EvaluationResult, error) {
+	results, err := m.eval(ctx, map[string]interface{}{claimsVarName: claims.Object})
+	if err != nil {
+		return EvaluationResult{}, err
+	}
+	if len(results) != 1 {
+		return EvaluationResult{}, fmt.Errorf("expected 1 evaluation result, got %d", len(results))
+	}
+	return results[0], nil
+}
+
+// EvalClaimMappings evaluates the given expressions and returns a list of EvaluationResult.
+func (m *mapper) EvalClaimMappings(ctx context.Context, claims *unstructured.Unstructured) ([]EvaluationResult, error) {
+	return m.eval(ctx, map[string]interface{}{claimsVarName: claims.Object})
+}
+
+// EvalUser evaluates the given user expressions and returns a list of EvaluationResult.
+func (m *mapper) EvalUser(ctx context.Context, userInfo *unstructured.Unstructured) ([]EvaluationResult, error) {
+	return m.eval(ctx, map[string]interface{}{userVarName: userInfo.Object})
+}
+
+func (m *mapper) eval(ctx context.Context, input map[string]interface{}) ([]EvaluationResult, error) {
+	evaluations := make([]EvaluationResult, len(m.compilationResults))
+
+	for i, compilationResult := range m.compilationResults {
+		var evaluation = &evaluations[i]
+		evaluation.ExpressionAccessor = compilationResult.ExpressionAccessor
+
+		evalResult, _, err := compilationResult.Program.ContextEval(ctx, input)
+		if err != nil {
+			return nil, fmt.Errorf("expression '%s' resulted in error: %w", compilationResult.ExpressionAccessor.GetExpression(), err)
+		}
+
+		evaluation.EvalResult = evalResult
+	}
+
+	return evaluations, nil
+}