1 files changed, 51 insertions, 0 deletions
diff --git a/src/lib/pk_pad/emsa4/emsa4.h b/src/lib/pk_pad/emsa4/emsa4.h
new file mode 100644
index 000000000..44bf5a429
--- /dev/null
+++ b/src/lib/pk_pad/emsa4/emsa4.h
@@ -0,0 +1,51 @@
+/*
+* EMSA4
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_EMSA4_H__
+#define BOTAN_EMSA4_H__
+
+#include <botan/emsa.h>
+#include <botan/hash.h>
+#include <botan/kdf.h>
+
+namespace Botan {
+
+/**
+* EMSA4 aka PSS-R
+*/
+class BOTAN_DLL EMSA4 : public EMSA
+   {
+   public:
+      /**
+      * @param hash the hash object to use
+      */
+      EMSA4(HashFunction* hash);
+
+      /**
+      * @param hash the hash object to use
+      * @param salt_size the size of the salt to use in bytes
+      */
+      EMSA4(HashFunction* hash, size_t salt_size);
+
+      ~EMSA4() { delete hash; delete mgf; }
+   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);
+
+      size_t SALT_SIZE;
+      HashFunction* hash;
+      const MGF* mgf;
+   };
+
+}
+
+#endif