/* aead-encrypt-msg.c */ /* nettle, low-level cryptographics library * * Copyright (C) 2014 Niels Möller * * The nettle library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or (at your * option) any later version. * * The nettle library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with the nettle library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02111-1301, USA. */ #if HAVE_CONFIG_H # include "config.h" #endif #include "aead.h" #include "nettle-meta.h" size_t aead_encrypt_msg_size(const struct nettle_aead *aead, size_t size) { return size + aead->digest_size; } void aead_encrypt_msg (const struct nettle_aead *aead, void *ctx, const uint8_t *nonce, size_t ad_size, const uint8_t *ad, size_t plaintext_size, uint8_t *gibberish, const uint8_t *plaintext) { /* Allow NULL nonce, for the case that the caller already has done that. E.g., if the application uses a nonce size different from aead->nonce_size. */ if (nonce) aead->set_nonce (ctx, nonce); aead->update (ctx, ad_size, ad); aead->encrypt (ctx, plaintext_size, gibberish, plaintext); aead->digest (ctx, aead->digest_size, gibberish + plaintext_size); }