1 files changed, 36 insertions, 0 deletions
diff --git a/libgo/go/crypto/cipher/cipher_test.go b/libgo/go/crypto/cipher/cipher_test.go
new file mode 100644
index 0000000..8da5bce
--- /dev/null
+++ b/libgo/go/crypto/cipher/cipher_test.go
@@ -0,0 +1,36 @@
+// Copyright 2013 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cipher_test
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"testing"
+)
+
+func TestCryptBlocks(t *testing.T) {
+	buf := make([]byte, 16)
+	block, _ := aes.NewCipher(buf)
+
+	mode := cipher.NewCBCDecrypter(block, buf)
+	mustPanic(t, "crypto/cipher: input not full blocks", func() { mode.CryptBlocks(buf, buf[:3]) })
+	mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })
+
+	mode = cipher.NewCBCEncrypter(block, buf)
+	mustPanic(t, "crypto/cipher: input not full blocks", func() { mode.CryptBlocks(buf, buf[:3]) })
+	mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })
+}
+
+func mustPanic(t *testing.T, msg string, f func()) {
+	defer func() {
+		err := recover()
+		if err == nil {
+			t.Errorf("function did not panic, wanted %q", msg)
+		} else if err != msg {
+			t.Errorf("got panic %v, wanted %q", err, msg)
+		}
+	}()
+	f()
+}