Add Benchmark tests for Deterministic AEAD in Golang.

It tests encrypting and decrypting 16k data.

Output:
cpu: AMD EPYC 7B12
BenchmarkAESSIV/AES256_SIV-8                6500            176030 ns/op           54657 B/op         23 allocs/op
PiperOrigin-RevId: 625278908

Author: juergw

go/daead/BUILD.bazel

@@ -36,6 +36,7 @@ go_test(
     name = "daead_test",
     srcs = [
         "aes_siv_key_manager_test.go",
+        "daead_benchmark_test.go",
         "daead_factory_test.go",
         "daead_init_test.go",
         "daead_key_templates_test.go",

go/daead/daead_benchmark_test.go

@@ -0,0 +1,71 @@
+// 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 daead_test
+
+import (
+	"testing"
+
+	"github.com/google/tink/go/daead"
+	"github.com/google/tink/go/keyset"
+	"github.com/google/tink/go/subtle/random"
+	tinkpb "github.com/google/tink/go/proto/tink_go_proto"
+)
+
+// Benchmarks for Deterministic AEAD algorithms.
+
+func BenchmarkAESSIV(b *testing.B) {
+	const (
+		plaintextSize      = 16 * 1024
+		associatedDataSize = 256
+	)
+	testCases := []struct {
+		name     string
+		template *tinkpb.KeyTemplate
+	}{
+		{
+			name:     "AES256_SIV",
+			template: daead.AESSIVKeyTemplate(),
+		},
+	}
+	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 := daead.New(handle)
+			if err != nil {
+				b.Fatal(err)
+			}
+			plaintext := random.GetRandomBytes(plaintextSize)
+			associatedData := random.GetRandomBytes(associatedDataSize)
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				ciphertext, err := primitive.EncryptDeterministically(plaintext, associatedData)
+				if err != nil {
+					b.Fatal(err)
+				}
+				_, err = primitive.DecryptDeterministically(ciphertext, associatedData)
+				if err != nil {
+					b.Error(err)
+				}
+			}
+		})
+	}
+}