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-rw-r--r--examples/encrypt2.cpp66
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diff --git a/examples/encrypt2.cpp b/examples/encrypt2.cpp
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+/*
+* (C) 2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/botan.h>
+#include <botan/pbkdf2.h>
+#include <botan/hmac.h>
+#include <botan/sha160.h>
+
+#include <fstream>
+
+using namespace Botan;
+
+int main()
+ {
+ Botan::LibraryInitializer init;
+
+ AutoSeeded_RNG rng;
+
+ std::string passphrase = "secret";
+
+ std::ifstream infile("readme.txt");
+ std::ofstream outfile("readme.txt.enc");
+
+ PKCS5_PBKDF2 pbkdf2(new HMAC(new SHA_160));
+
+ const u32bit PBKDF2_ITERATIONS = 8192;
+
+ SecureVector<byte> salt(8);
+ rng.randomize(&salt[0], salt.size());
+
+ SecureVector<byte> master_key = pbkdf2.derive_key(48, passphrase,
+ &salt[0], salt.size(),
+ PBKDF2_ITERATIONS).bits_of();
+
+ KDF* kdf = get_kdf("KDF2(SHA-1)");
+
+ SymmetricKey key = kdf->derive_key(20, master_key, "cipher key");
+
+ SymmetricKey mac_key = kdf->derive_key(20, master_key, "hmac key");
+
+ InitializationVector iv = kdf->derive_key(8, master_key, "cipher iv");
+
+ Pipe pipe(new Fork(
+ new Chain(
+ get_cipher("Blowfish/CBC/PKCS7", key, iv, ENCRYPTION),
+ new Base64_Encoder,
+ new DataSink_Stream(outfile)
+ ),
+ new Chain(
+ new MAC_Filter("HMAC(SHA-1)", mac_key),
+ new Hex_Encoder)
+ )
+ );
+
+ outfile.write((const char*)salt.begin(), salt.size());
+
+ pipe.start_msg();
+ infile >> pipe;
+ pipe.end_msg();
+
+ SecureVector<byte> hmac = pipe.read_all(1);
+ outfile.write((const char*)hmac.begin(), hmac.size());
+ }