Add KEM scheme for McEliece

1 files changed, 45 insertions, 0 deletions

diff --git a/src/lib/pubkey/mce/mce_kem.h b/src/lib/pubkey/mce/mce_kem.h
new file mode 100644
index 000000000..4e46a0fab
--- /dev/null
+++ b/src/lib/pubkey/mce/mce_kem.h
@@ -0,0 +1,45 @@
+/**
+ * (C) 2014 cryptosource GmbH
+ * (C) 2014 Falko Strenzke [email protected]
+ *
+ * Distributed under the terms of the Botan license
+ *
+ */
+
+#ifndef BOTAN_MCE_KEM_H__
+#define BOTAN_MCE_KEM_H__
+
+#include <botan/mceliece.h>
+#include <utility>
+
+namespace Botan {
+
+class BOTAN_DLL McEliece_KEM_Encryptor
+   {
+   public:
+      McEliece_KEM_Encryptor(const McEliece_PublicKey& public_key);
+
+      /**
+      * returns the pair (mceliece ciphertext, symmetric key)
+      */
+      std::pair<secure_vector<byte>, secure_vector<byte>> encrypt(RandomNumberGenerator& rng);
+
+   private:
+      McEliece_Public_Operation m_raw_pub_op;
+   };
+
+class BOTAN_DLL McEliece_KEM_Decryptor
+   {
+    public:
+      McEliece_KEM_Decryptor(const McEliece_PrivateKey& mce_key);
+
+      /**
+      * returns the derived 512-bit symmetric key
+      */
+      secure_vector<Botan::byte> decrypt(const byte msg[], size_t msg_len);
+   private:
+      McEliece_Private_Operation m_raw_priv_op;
+  };
+}
+
+#endif /* h-guard */