diff options
Diffstat (limited to 'doc')
-rw-r--r-- | doc/examples/encrypt2.cpp | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/doc/examples/encrypt2.cpp b/doc/examples/encrypt2.cpp new file mode 100644 index 000000000..3d91a9bc5 --- /dev/null +++ b/doc/examples/encrypt2.cpp @@ -0,0 +1,55 @@ +#include <botan/botan.h> +#include <botan/pbkdf2.h> +#include <botan/hmac.h> +#include <botan/sha160.h> + +#include <fstream> + +using namespace Botan; + +int main() + { + 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)); + + pbkdf2.set_iterations(4096); + pbkdf2.new_random_salt(rng, 8); + SecureVector<byte> the_salt = pbkdf2.current_salt(); + + SecureVector<byte> master_key = pbkdf2.derive_key(48, passphrase).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*)the_salt.begin(), the_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()); + } |