1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/golang.org/x/crypto/poly1305/poly1305_test.go b/vendor/golang.org/x/crypto/poly1305/poly1305_test.go
index 7b8ab2fe1..017027fe6 100644
--- a/vendor/golang.org/x/crypto/poly1305/poly1305_test.go
+++ b/vendor/golang.org/x/crypto/poly1305/poly1305_test.go
@@ -6,10 +6,14 @@ package poly1305
 
 import (
 	"bytes"
+	"encoding/hex"
+	"flag"
 	"testing"
 	"unsafe"
 )
 
+var stressFlag = flag.Bool("stress", false, "run slow stress tests")
+
 var testData = []struct {
 	in, k, correct []byte
 }{
@@ -88,6 +92,39 @@ func testSum(t *testing.T, unaligned bool) {
 	}
 }
 
+func TestBurnin(t *testing.T) {
+	// This test can be used to sanity-check significant changes. It can
+	// take about many minutes to run, even on fast machines. It's disabled
+	// by default.
+	if !*stressFlag {
+		t.Skip("skipping without -stress")
+	}
+
+	var key [32]byte
+	var input [25]byte
+	var output [16]byte
+
+	for i := range key {
+		key[i] = 1
+	}
+	for i := range input {
+		input[i] = 2
+	}
+
+	for i := uint64(0); i < 1e10; i++ {
+		Sum(&output, input[:], &key)
+		copy(key[0:], output[:])
+		copy(key[16:], output[:])
+		copy(input[:], output[:])
+		copy(input[16:], output[:])
+	}
+
+	const expected = "5e3b866aea0b636d240c83c428f84bfa"
+	if got := hex.EncodeToString(output[:]); got != expected {
+		t.Errorf("expected %s, got %s", expected, got)
+	}
+}
+
 func TestSum(t *testing.T)          { testSum(t, false) }
 func TestSumUnaligned(t *testing.T) { testSum(t, true) }