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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| // Copyright 2024 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 cache defines the IssuanceChainCache type, which allows different cache implementation with Get and Set operations. | ||
| package cache | ||
|
|
||
| import "context" | ||
|
|
||
| // IssuanceChainCache is an interface which allows CTFE binaries to use different cache implementations for issuance chains. | ||
| type IssuanceChainCache interface { | ||
| // Get returns the issuance chain associated with the provided hash. | ||
| Get(ctx context.Context, key []byte) ([]byte, error) | ||
|
|
||
| // Set inserts the key-value pair of issuance chain. | ||
| Set(ctx context.Context, key []byte, chain []byte) error | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Copyright 2024 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 lru defines the IssuanceChainCache type, which implements IssuanceChainCache interface with Get and Set operations. | ||
| package lru | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "github.com/hashicorp/golang-lru/v2/expirable" | ||
| ) | ||
|
|
||
| type CacheOption struct { | ||
| Size int | ||
| TTL time.Duration | ||
| } | ||
|
|
||
| type IssuanceChainCache struct { | ||
| opt CacheOption | ||
| cache *expirable.LRU[string, []byte] | ||
| } | ||
|
|
||
| func NewIssuanceChainCache(opt CacheOption) *IssuanceChainCache { | ||
| cache := expirable.NewLRU[string, []byte](int(opt.Size), nil, opt.TTL) | ||
| return &IssuanceChainCache{ | ||
| opt: opt, | ||
| cache: cache, | ||
| } | ||
| } | ||
|
|
||
| func (c *IssuanceChainCache) Get(_ context.Context, key []byte) ([]byte, error) { | ||
| chain, _ := c.cache.Get(string(key)) | ||
| return chain, nil | ||
| } | ||
|
|
||
| func (c *IssuanceChainCache) Set(_ context.Context, key []byte, chain []byte) error { | ||
| c.cache.Add(string(key), chain) | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| // Copyright 2024 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 lru | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "crypto/sha256" | ||
| "os" | ||
| "testing" | ||
| ) | ||
|
|
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| func TestLRUIssuanceChainCache(t *testing.T) { | ||
| cacheSize := 3 | ||
|
|
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| tests := setupTestData(t, | ||
| "leaf00.chain", | ||
| "leaf01.chain", | ||
| "leaf02.chain", | ||
| ) | ||
|
|
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| cache := NewIssuanceChainCache(CacheOption{Size: cacheSize}) | ||
|
|
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| for key, val := range tests { | ||
| if err := cache.Set(context.Background(), []byte(key), val); err != nil { | ||
| t.Errorf("cache.Set: %v", err) | ||
| } | ||
| } | ||
|
|
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| for key, want := range tests { | ||
| got, err := cache.Get(context.Background(), []byte(key)) | ||
| if err != nil { | ||
| t.Errorf("cache.Get: %v", err) | ||
| } | ||
| if !bytes.Equal(got, want) { | ||
| t.Errorf("got: %v, want: %v", got, want) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func setupTestData(t *testing.T, filenames ...string) map[string][]byte { | ||
| t.Helper() | ||
|
|
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| data := make(map[string][]byte, len(filenames)) | ||
|
|
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| for _, filename := range filenames { | ||
| val, err := os.ReadFile("../../../testdata/" + filename) | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| key := sha256.Sum256(val) | ||
| data[string(key[:])] = val | ||
| } | ||
|
|
||
| return data | ||
| } |
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