3 files changed, 116 insertions, 0 deletions
diff --git a/src/pk_pad/info.txt b/src/pk_pad/info.txt
new file mode 100644
index 000000000..d28ddd9fc
--- /dev/null
+++ b/src/pk_pad/info.txt
@@ -0,0 +1,10 @@
+realname "Public Key Signature and Encryption Padding"
+
+define PK_PADDING
+
+load_on auto
+
+<add>
+pk_pad.cpp
+pk_pad.h
+</add>
diff --git a/src/pk_pad/pk_pad.cpp b/src/pk_pad/pk_pad.cpp
new file mode 100644
index 000000000..23dc9a95b
--- /dev/null
+++ b/src/pk_pad/pk_pad.cpp
@@ -0,0 +1,48 @@
+/*************************************************
+* EME/EMSA Base Class Source File                *
+* (C) 1999-2008 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/pk_pad.h>
+
+namespace Botan {
+
+/*************************************************
+* Encode a message                               *
+*************************************************/
+SecureVector<byte> EME::encode(const byte msg[], u32bit msg_len,
+                               u32bit key_bits,
+                               RandomNumberGenerator& rng) const
+   {
+   return pad(msg, msg_len, key_bits, rng);
+   }
+
+/*************************************************
+* Encode a message                               *
+*************************************************/
+SecureVector<byte> EME::encode(const MemoryRegion<byte>& msg,
+                               u32bit key_bits,
+                               RandomNumberGenerator& rng) const
+   {
+   return pad(msg, msg.size(), key_bits, rng);
+   }
+
+/*************************************************
+* Decode a message                               *
+*************************************************/
+SecureVector<byte> EME::decode(const byte msg[], u32bit msg_len,
+                               u32bit key_bits) const
+   {
+   return unpad(msg, msg_len, key_bits);
+   }
+
+/*************************************************
+* Decode a message                               *
+*************************************************/
+SecureVector<byte> EME::decode(const MemoryRegion<byte>& msg,
+                               u32bit key_bits) const
+   {
+   return unpad(msg, msg.size(), key_bits);
+   }
+
+}
diff --git a/src/pk_pad/pk_pad.h b/src/pk_pad/pk_pad.h
new file mode 100644
index 000000000..ed1742155
--- /dev/null
+++ b/src/pk_pad/pk_pad.h
@@ -0,0 +1,58 @@
+/*************************************************
+* EME/EMSA Classes Header File                   *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#ifndef BOTAN_PUBKEY_PAD_H__
+#define BOTAN_PUBKEY_PAD_H__
+
+#include <botan/base.h>
+#include <botan/rng.h>
+
+namespace Botan {
+
+/*************************************************
+* Encoding Method for Encryption                 *
+*************************************************/
+class BOTAN_DLL EME
+   {
+   public:
+      virtual u32bit maximum_input_size(u32bit) const = 0;
+
+      SecureVector<byte> encode(const byte[], u32bit, u32bit,
+                                RandomNumberGenerator&) const;
+      SecureVector<byte> encode(const MemoryRegion<byte>&, u32bit,
+                                RandomNumberGenerator&) const;
+
+      SecureVector<byte> decode(const byte[], u32bit, u32bit) const;
+      SecureVector<byte> decode(const MemoryRegion<byte>&, u32bit) const;
+
+      virtual ~EME() {}
+   private:
+      virtual SecureVector<byte> pad(const byte[], u32bit, u32bit,
+                                     RandomNumberGenerator&) const = 0;
+
+      virtual SecureVector<byte> unpad(const byte[], u32bit, u32bit) const = 0;
+   };
+
+/*************************************************
+* Encoding Method for Signatures, Appendix       *
+*************************************************/
+class BOTAN_DLL EMSA
+   {
+   public:
+      virtual void update(const byte[], u32bit) = 0;
+      virtual SecureVector<byte> raw_data() = 0;
+
+      virtual SecureVector<byte> encoding_of(const MemoryRegion<byte>&,
+                                             u32bit,
+                                             RandomNumberGenerator& rng) = 0;
+
+      virtual bool verify(const MemoryRegion<byte>&, const MemoryRegion<byte>&,
+                          u32bit) throw() = 0;
+      virtual ~EMSA() {}
+   };
+
+}
+
+#endif