lib/blocks: add Pkcs7PaddingUndo

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/blocks.go b/lib/blocks.go
index 452766b..0645fab 100644
--- a/lib/blocks.go
+++ b/lib/blocks.go
@@ -96,3 +96,8 @@ func Pkcs7Padding(in []byte, k int) []byte {
 	}
 	return in
 }
+
+// Removes PKCS#7 Padding from input `in`
+func Pkcs7PaddingUndo(in []byte) []byte {
+	return in[0:(len(in) - int(in[len(in)-1]))]
+}