add kdf1 implementation according to iso-18033 (preparation for ecies)

1 files changed, 37 insertions, 0 deletions

diff --git a/src/lib/kdf/kdf1_iso18033/kdf1_iso18033.h b/src/lib/kdf/kdf1_iso18033/kdf1_iso18033.h
new file mode 100644
index 000000000..6ec7ead8e
--- /dev/null
+++ b/src/lib/kdf/kdf1_iso18033/kdf1_iso18033.h
@@ -0,0 +1,37 @@
+/*
+* KDF1 from ISO 18033
+* (C) 2016 Philipp Weber
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_KDF1_18033_H__
+#define BOTAN_KDF1_18033_H__
+
+#include <botan/kdf.h>
+#include <botan/hash.h>
+
+namespace Botan {
+
+/**
+* KDF1, from IEEE 1363
+*/
+class BOTAN_DLL KDF1_18033 : public KDF
+   {
+   public:
+      std::string name() const override { return "KDF1-18033(" + m_hash->name() + ")"; }
+
+      KDF* clone() const override { return new KDF1_18033(m_hash->clone()); }
+
+      size_t kdf(byte key[], size_t key_len,
+                 const byte secret[], size_t secret_len,
+                 const byte salt[], size_t salt_len) const override;
+
+      KDF1_18033(HashFunction* h) : m_hash(h) {}
+   private:
+      std::unique_ptr<HashFunction> m_hash;
+   };
+
+}
+
+#endif