1 files changed, 45 insertions, 0 deletions
diff --git a/src/lib/pk_pad/emsa2/emsa2.h b/src/lib/pk_pad/emsa2/emsa2.h
new file mode 100644
index 000000000..fb0cecb21
--- /dev/null
+++ b/src/lib/pk_pad/emsa2/emsa2.h
@@ -0,0 +1,45 @@
+/*
+* EMSA2
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_EMSA2_H__
+#define BOTAN_EMSA2_H__
+
+#include <botan/emsa.h>
+#include <botan/hash.h>
+
+namespace Botan {
+
+/**
+* EMSA2 from IEEE 1363
+* Useful for Rabin-Williams
+*/
+class BOTAN_DLL EMSA2 : public EMSA
+   {
+   public:
+      /**
+      * @param hash the hash object to use
+      */
+      EMSA2(HashFunction* hash);
+      ~EMSA2() { delete hash; }
+   private:
+      void update(const byte[], size_t);
+      secure_vector<byte> raw_data();
+
+      secure_vector<byte> encoding_of(const secure_vector<byte>&, size_t,
+                                     RandomNumberGenerator& rng);
+
+      bool verify(const secure_vector<byte>&, const secure_vector<byte>&,
+                  size_t);
+
+      secure_vector<byte> empty_hash;
+      HashFunction* hash;
+      byte hash_id;
+   };
+
+}
+
+#endif