Add BSI variant of EMSA1, from InSiTo

1 files changed, 30 insertions, 0 deletions

diff --git a/src/pk_pad/emsa1_bsi/emsa1_bsi.h b/src/pk_pad/emsa1_bsi/emsa1_bsi.h
new file mode 100644
index 000000000..0c0745bb0
--- /dev/null
+++ b/src/pk_pad/emsa1_bsi/emsa1_bsi.h
@@ -0,0 +1,30 @@
+/*************************************************
+* EMSA1 BSI Variant Header File                  *
+* (C) 1999-2008 Jack Lloyd                       *
+*     2007 FlexSecure GmbH                       *
+*************************************************/
+
+#ifndef BOTAN_EMSA1_BSI_H__
+#define BOTAN_EMSA1_BSI_H__
+
+#include <botan/emsa1.h>
+
+namespace Botan {
+
+/**
+EMSA1_BSI is a variant of EMSA1 specified by the BSI. It accepts only
+hash values which are less or equal than the maximum key length. The
+implementation comes from InSiTo
+*/
+class BOTAN_DLL EMSA1_BSI : public EMSA1
+   {
+   public:
+      EMSA1_BSI(HashFunction* hash) : EMSA1(hash) {}
+   private:
+      SecureVector<byte> encoding_of(const MemoryRegion<byte>&, u32bit,
+                                     RandomNumberGenerator& rng);
+   };
+
+}
+
+#endif