From a6177d3af54437375c752b8046230b7fb98c8563 Mon Sep 17 00:00:00 2001
From: lloyd <lloyd@randombit.net>
Date: Thu, 5 Nov 2009 07:52:35 +0000
Subject: Add format preserving encryption, design is FE1/FD1 from the paper
 Format-Preserving Encryption (http://eprint.iacr.org/2009/251). This doesn't
 implement the rank functions which are necessary for the actual
 format-preserving part, though that would be nice to add to the example.

---
 doc/examples/fpe.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 doc/examples/fpe.cpp

(limited to 'doc')

diff --git a/doc/examples/fpe.cpp b/doc/examples/fpe.cpp
new file mode 100644
index 000000000..9384a0d2d
--- /dev/null
+++ b/doc/examples/fpe.cpp
@@ -0,0 +1,22 @@
+#include <botan/fpe.h>
+#include <botan/init.h>
+
+using namespace Botan;
+
+#include <iostream>
+
+int main()
+   {
+   LibraryInitializer init;
+
+   BigInt n = 100000000;
+   BigInt x = 49604394;
+
+   SymmetricKey key("AAAAAAAAAAAAAAAA");
+   MemoryVector<byte> tweak(4);
+
+   BigInt c = fpe_encrypt(n, x, key, tweak);
+   BigInt p = fpe_decrypt(n, c, key, tweak);
+
+   std::cout << c << ' ' << p << ' ' << x << '\n';
+   }
-- 
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