Add BSI variant of EMSA1, from InSiTo

1 files changed, 27 insertions, 0 deletions

diff --git a/src/pk_pad/emsa1_bsi/emsa1_bsi.cpp b/src/pk_pad/emsa1_bsi/emsa1_bsi.cpp
new file mode 100644
index 000000000..cc7868a1d
--- /dev/null
+++ b/src/pk_pad/emsa1_bsi/emsa1_bsi.cpp
@@ -0,0 +1,27 @@
+/*************************************************
+* EMSA1 BSI Source File                          *
+* (C) 1999-2008 Jack Lloyd                       *
+*     2008 Falko Strenzke, FlexSecure GmbH       *
+*************************************************/
+
+#include <botan/emsa1_bsi.h>
+
+namespace Botan {
+
+/*************************************************
+* EMSA1 BSI Encode Operation                     *
+*************************************************/
+SecureVector<byte> EMSA1_BSI::encoding_of(const MemoryRegion<byte>& msg,
+                                          u32bit output_bits,
+                                          RandomNumberGenerator&)
+   {
+   if(msg.size() != hash_ptr()->OUTPUT_LENGTH)
+      throw Encoding_Error("EMSA1_BSI::encoding_of: Invalid size for input");
+
+   if(8*msg.size() <= output_bits)
+      return msg;
+
+   throw Encoding_Error("EMSA1_BSI::encoding_of: max key input size exceeded");
+   }
+
+}