examples/keywrap.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

/*
* NIST keywrap example
* (C) 2011 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/

#include <botan/botan.h>
#include <botan/rfc3394.h>
#include <botan/hex.h>
#include <iostream>

int main()
   {
   using namespace Botan;

   LibraryInitializer init;

   AutoSeeded_RNG rng;

   // The key to encrypt
   SymmetricKey key(rng, 24);

   // The key encryption key
   SymmetricKey kek(rng, 32);

   std::cout << "Original:  " << key.as_string() << "\n";

   Algorithm_Factory& af = global_state().algorithm_factory();

   SecureVector<byte> enc = rfc3394_keywrap(key.bits_of(), kek, af);

   std::cout << "Encrypted: " << hex_encode(enc) << "\n";

   SecureVector<byte> dec = rfc3394_keyunwrap(enc, kek, af);

   std::cout << "Decrypted: " << hex_encode(dec) << "\n";
   }