mirror of
https://github.com/ceph/ceph-csi.git
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67 lines
2.3 KiB
Go
67 lines
2.3 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cel
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import (
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"context"
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"fmt"
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celgo "github.com/google/cel-go/cel"
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authorizationv1 "k8s.io/api/authorization/v1"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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)
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type CELMatcher struct {
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CompilationResults []CompilationResult
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}
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// eval evaluates the given SubjectAccessReview against all cel matchCondition expression
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func (c *CELMatcher) Eval(ctx context.Context, r *authorizationv1.SubjectAccessReview) (bool, error) {
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var evalErrors []error
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va := map[string]interface{}{
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"request": convertObjectToUnstructured(&r.Spec),
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}
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for _, compilationResult := range c.CompilationResults {
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evalResult, _, err := compilationResult.Program.ContextEval(ctx, va)
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if err != nil {
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evalErrors = append(evalErrors, fmt.Errorf("cel evaluation error: expression '%v' resulted in error: %w", compilationResult.ExpressionAccessor.GetExpression(), err))
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continue
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}
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if evalResult.Type() != celgo.BoolType {
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evalErrors = append(evalErrors, fmt.Errorf("cel evaluation error: expression '%v' eval result type should be bool but got %W", compilationResult.ExpressionAccessor.GetExpression(), evalResult.Type()))
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continue
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}
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match, ok := evalResult.Value().(bool)
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if !ok {
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evalErrors = append(evalErrors, fmt.Errorf("cel evaluation error: expression '%v' eval result value should be bool but got %W", compilationResult.ExpressionAccessor.GetExpression(), evalResult.Value()))
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continue
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}
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// If at least one matchCondition successfully evaluates to FALSE,
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// return early
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if !match {
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return false, nil
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}
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}
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// if there is any error, return
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if len(evalErrors) > 0 {
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return false, utilerrors.NewAggregate(evalErrors)
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}
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// return ALL matchConditions evaluate to TRUE successfully without error
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return true, nil
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}
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