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-rw-r--r--src/encryption_context.cc80
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diff --git a/src/encryption_context.cc b/src/encryption_context.cc
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--- a/src/encryption_context.cc
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-/*
- Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
-
- This file is part of libdcp.
-
- libdcp is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- libdcp 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with libdcp. If not, see <http://www.gnu.org/licenses/>.
-
- In addition, as a special exception, the copyright holders give
- permission to link the code of portions of this program with the
- OpenSSL library under certain conditions as described in each
- individual source file, and distribute linked combinations
- including the two.
-
- You must obey the GNU General Public License in all respects
- for all of the code used other than OpenSSL. If you modify
- file(s) with this exception, you may extend this exception to your
- version of the file(s), but you are not obligated to do so. If you
- do not wish to do so, delete this exception statement from your
- version. If you delete this exception statement from all source
- files in the program, then also delete it here.
-*/
-
-#include "encryption_context.h"
-#include "exceptions.h"
-#include <asdcp/AS_DCP.h>
-#include <asdcp/KM_prng.h>
-
-using boost::optional;
-using namespace dcp;
-
-EncryptionContext::EncryptionContext (optional<Key> key, Standard standard)
- : _encryption (0)
- , _hmac (0)
-{
- if (!key) {
- return;
- }
-
- _encryption = new ASDCP::AESEncContext;
- if (ASDCP_FAILURE (_encryption->InitKey (key->value ()))) {
- throw MiscError ("could not set up encryption context");
- }
-
- uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
-
- Kumu::FortunaRNG rng;
- if (ASDCP_FAILURE (_encryption->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
- throw MiscError ("could not set up CBC initialization vector");
- }
-
- _hmac = new ASDCP::HMACContext;
-
- ASDCP::LabelSet_t type;
- if (standard == INTEROP) {
- type = ASDCP::LS_MXF_INTEROP;
- } else {
- type = ASDCP::LS_MXF_SMPTE;
- }
-
- if (ASDCP_FAILURE (_hmac->InitKey (key->value(), type))) {
- throw MiscError ("could not set up HMAC context");
- }
-}
-
-EncryptionContext::~EncryptionContext ()
-{
- delete _encryption;
- delete _hmac;
-}