Imported Upstream version 1.3upstream/1.3

1 files changed, 4 insertions, 0 deletions

diff --git a/src/pkg/crypto/subtle/constant_time.go b/src/pkg/crypto/subtle/constant_time.go
index dfb658465..de1a4e8c5 100644
--- a/src/pkg/crypto/subtle/constant_time.go
+++ b/src/pkg/crypto/subtle/constant_time.go
@@ -10,6 +10,10 @@ package subtle
 // and y, have equal contents. The time taken is a function of the length of
 // the slices and is independent of the contents.
 func ConstantTimeCompare(x, y []byte) int {
+	if len(x) != len(y) {
+		panic("subtle: slices have different lengths")
+	}
+
 	var v byte
 
 	for i := 0; i < len(x); i++ {