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// 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 streamingaead_test
import (
"bytes"
"io"
"testing"
"github.com/tink-crypto/tink-go/v2/keyset"
"github.com/tink-crypto/tink-go/v2/streamingaead"
"github.com/tink-crypto/tink-go/v2/subtle/random"
tinkpb "github.com/tink-crypto/tink-go/v2/proto/tink_go_proto"
)
// Benchmarks for Steaming AEAD algorithms.
func BenchmarkEncryptDecrypt(b *testing.B) {
const (
blockSize = 16 * 1024 // amount of data written/read in each operation.
operations = 1024 // number of operations.
plaintextSize = blockSize * operations
associatedDataSize = 256
)
testCases := []struct {
name string
template *tinkpb.KeyTemplate
}{
{
name: "AES128_GCM_HKDF_4KB",
template: streamingaead.AES128GCMHKDF4KBKeyTemplate(),
}, {
name: "AES128_GCM_HKDF_1MB",
template: streamingaead.AES128GCMHKDF1MBKeyTemplate(),
}, {
name: "AES256_GCM_HKDF_4KB",
template: streamingaead.AES256GCMHKDF4KBKeyTemplate(),
}, {
name: "AES256_GCM_HKDF_1MB",
template: streamingaead.AES256GCMHKDF1MBKeyTemplate(),
}, {
name: "AES128_CTR_HMAC_SHA256_4KB",
template: streamingaead.AES128CTRHMACSHA256Segment4KBKeyTemplate(),
}, {
name: "AES128_CTR_HMAC_SHA256_1MB",
template: streamingaead.AES128CTRHMACSHA256Segment1MBKeyTemplate(),
}, {
name: "AES256_CTR_HMAC_SHA256_4KB",
template: streamingaead.AES256CTRHMACSHA256Segment4KBKeyTemplate(),
}, {
name: "AES256_CTR_HMAC_SHA256_1MB",
template: streamingaead.AES256CTRHMACSHA256Segment1MBKeyTemplate(),
},
}
for _, tc := range testCases {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
handle, err := keyset.NewHandle(tc.template)
if err != nil {
b.Fatal(err)
}
primitive, err := streamingaead.New(handle)
if err != nil {
b.Fatal(err)
}
plaintextBlock := random.GetRandomBytes(blockSize)
associatedData := random.GetRandomBytes(associatedDataSize)
// Make ciphertextBuf large enough so that buffer doesn't need to re-allocate data.
ciphertextBufferSize := 2*plaintextSize + 128
ciphertextBuf := make([]byte, ciphertextBufferSize)
decryptedBuf := make([]byte, blockSize)
b.ResetTimer()
for i := 0; i < b.N; i++ {
buffer := bytes.NewBuffer(ciphertextBuf[:0])
w, err := primitive.NewEncryptingWriter(buffer, associatedData)
if err != nil {
b.Fatal(err)
}
totalWritten := 0
for i := 0; i < operations; i++ {
n, err := w.Write(plaintextBlock)
if err != nil {
b.Fatal(err)
}
if n != blockSize {
b.Fatalf("w.Write(plaintextBlock) = %d, want %d", n, blockSize)
}
totalWritten += n
}
if err := w.Close(); err != nil {
b.Fatal(err)
}
if totalWritten != plaintextSize {
b.Fatalf("totalWritten = %d, want %d", totalWritten, plaintextSize)
}
r, err := primitive.NewDecryptingReader(buffer, associatedData)
if err != nil {
b.Fatal(err)
}
totalRead := 0
for {
n, err := r.Read(decryptedBuf)
if err == io.EOF {
break
}
if err != nil {
b.Fatal(err)
}
totalRead += n
}
if totalRead != plaintextSize {
b.Fatalf("totalRead = %d, want %d", totalRead, plaintextSize)
}
if cap(buffer.Bytes()) != ciphertextBufferSize {
b.Fatalf(
"want that buffer to uses at most %d memory, but it now has capacity %d",
ciphertextBufferSize, cap(buffer.Bytes()))
}
}
})
}
}
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