Added CIRCL SHAKE benchmarks.

benches/circl/Makefile

@@ -1,2 +1,5 @@
-bench-ref:
-	env GODEBUG=cpu.avx2=off go test -bench=.
+bench-kyber-ref:
+	env GODEBUG=cpu.avx2=off go test -bench='Kyber768'
+
+bench-shake-ref:
+	env GODEBUG=cpu.avx2=off go test -bench='SHAKE'

benches/circl/kyber768_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 )
 
-func BenchmarkKeyGeneration(b *testing.B) {
+func BenchmarkKyber768KeyGeneration(b *testing.B) {
 	scheme := schemes.ByName("Kyber768")
 
 	for i := 0; i < b.N; i++ {
@@ -15,7 +15,7 @@ func BenchmarkKeyGeneration(b *testing.B) {
 	}
 }
 
-func BenchmarkEncapsulation(b *testing.B) {
+func BenchmarkKyber768Encapsulation(b *testing.B) {
 	scheme := schemes.ByName("Kyber768")
 
 	pk, _, _ := scheme.GenerateKeyPair()
@@ -27,7 +27,7 @@ func BenchmarkEncapsulation(b *testing.B) {
 	}
 }
 
-func BenchmarkDecapsulation(b *testing.B) {
+func BenchmarkKyber768Decapsulation(b *testing.B) {
 	scheme := schemes.ByName("Kyber768")
 
 	pk, sk, _ := scheme.GenerateKeyPair()

benches/circl/shake_test.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"github.com/cloudflare/circl/xof"
+	"testing"
+)
+
+const bytesToOutput = 10000;
+
+func BenchmarkSHAKE128(b *testing.B) {
+    input := make([]byte, 0, 34);
+    output := make([]byte, bytesToOutput);
+
+    xof := xof.SHAKE128.New()
+    _, err := xof.Write([]byte(input))
+    if err != nil {
+        b.Fatal(err)
+    }
+
+	for i := 0; i < b.N; i++ {
+        n, err := xof.Read(output)
+        if n != bytesToOutput || err != nil {
+            b.Fatal()
+        }
+	}
+}
+
+func BenchmarkSHAKE256(b *testing.B) {
+    input := make([]byte, 0, 34);
+    output := make([]byte, bytesToOutput)
+
+    xof := xof.SHAKE256.New()
+    _, err := xof.Write([]byte(input))
+    if err != nil {
+        b.Fatal(err)
+    }
+
+	for i := 0; i < b.N; i++ {
+        n, err := xof.Read(output)
+        if n != bytesToOutput || err != nil {
+            b.Fatal()
+        }
+	}
+}