libgo: Update to weekly.2011-12-06.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182338 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 2 deletions

diff --git a/libgo/go/crypto/openpgp/s2k/s2k.go b/libgo/go/crypto/openpgp/s2k/s2k.go
index 83673e17335..8bc0bb320bb 100644
--- a/libgo/go/crypto/openpgp/s2k/s2k.go
+++ b/libgo/go/crypto/openpgp/s2k/s2k.go
@@ -26,6 +26,7 @@ var zero [1]byte
 // 4880, section 3.7.1.2) using the given hash, input passphrase and salt.
 func Salted(out []byte, h hash.Hash, in []byte, salt []byte) {
 	done := 0
+	var digest []byte
 
 	for i := 0; done < len(out); i++ {
 		h.Reset()
@@ -34,7 +35,8 @@ func Salted(out []byte, h hash.Hash, in []byte, salt []byte) {
 		}
 		h.Write(salt)
 		h.Write(in)
-		n := copy(out[done:], h.Sum(nil))
+		digest = h.Sum(digest[:0])
+		n := copy(out[done:], digest)
 		done += n
 	}
 }
@@ -52,6 +54,7 @@ func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) {
 	}
 
 	done := 0
+	var digest []byte
 	for i := 0; done < len(out); i++ {
 		h.Reset()
 		for j := 0; j < i; j++ {
@@ -68,7 +71,8 @@ func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) {
 				written += len(combined)
 			}
 		}
-		n := copy(out[done:], h.Sum(nil))
+		digest = h.Sum(digest[:0])
+		n := copy(out[done:], digest)
 		done += n
 	}
 }