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// Copyright 2022 Google LLC
//
// 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 monitoringutil implements utility functions for monitoring.
package monitoringutil
import (
"fmt"
"strings"
"github.com/tink-crypto/tink-go/v2/internal/primitiveset"
"github.com/tink-crypto/tink-go/v2/monitoring"
tpb "github.com/tink-crypto/tink-go/v2/proto/tink_go_proto"
)
const keytypeURLPrefix = "type.googleapis.com/google.crypto."
// DoNothingLogger is a Logger that does nothing when invoked.
type DoNothingLogger struct{}
var _ monitoring.Logger = (*DoNothingLogger)(nil)
// Log drops a log call.
func (l *DoNothingLogger) Log(uint32, int) {}
// LogFailure drops a failure call.
func (l *DoNothingLogger) LogFailure() {}
func keyStatusFromProto(status tpb.KeyStatusType) (monitoring.KeyStatus, error) {
var keyStatus monitoring.KeyStatus = 55
switch status {
case tpb.KeyStatusType_ENABLED:
keyStatus = monitoring.Enabled
case tpb.KeyStatusType_DISABLED:
keyStatus = monitoring.Disabled
case tpb.KeyStatusType_DESTROYED:
keyStatus = monitoring.Destroyed
default:
return keyStatus, fmt.Errorf("unknown key status: %q", status)
}
return keyStatus, nil
}
func parseKeyTypeURL(ktu string) string {
return strings.TrimPrefix(ktu, keytypeURLPrefix)
}
// KeysetInfoFromPrimitiveSet creates a `KeysetInfo` from a `PrimitiveSet`.
// This function doesn't guarantee to preserve the ordering of the keys in the keyset.
func KeysetInfoFromPrimitiveSet[T any](ps *primitiveset.PrimitiveSet[T]) (*monitoring.KeysetInfo, error) {
if ps == nil {
return nil, fmt.Errorf("primitive set is nil")
}
if len(ps.Entries) == 0 {
return nil, fmt.Errorf("primitive set is empty")
}
if ps.Primary == nil {
return nil, fmt.Errorf("primary key must not be nil")
}
entries := []*monitoring.Entry{}
for _, pse := range ps.Entries {
for _, pe := range pse {
keyStatus, err := keyStatusFromProto(pe.Status)
if err != nil {
return nil, err
}
e := &monitoring.Entry{
KeyID: pe.KeyID,
Status: keyStatus,
KeyType: parseKeyTypeURL(pe.TypeURL),
KeyPrefix: pe.PrefixType.String(),
}
entries = append(entries, e)
}
}
return &monitoring.KeysetInfo{
Annotations: ps.Annotations,
PrimaryKeyID: ps.Primary.KeyID,
Entries: entries,
}, nil
}
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