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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
Copyright (C) 2019 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef DCPOMATIC_VARIANT_SWAROOP
#include "encrypted_ecinema_kdm.h"
#include "ecinema_kdm_data.h"
#include "exceptions.h"
#include "cross.h"
#include <dcp/key.h>
#include <dcp/certificate.h>
#include <dcp/util.h>
#include <libcxml/cxml.h>
#include <libxml++/libxml++.h>
#include <openssl/rsa.h>
#include <openssl/err.h>
#include <iostream>
using std::cout;
using std::string;
using boost::shared_ptr;
using boost::optional;
using dcp::Certificate;
EncryptedECinemaKDM::EncryptedECinemaKDM (string id, string name, dcp::Key content_key, optional<dcp::LocalTime> not_valid_before, optional<dcp::LocalTime> not_valid_after, Certificate recipient)
: _id (id)
, _name (name)
{
RSA* rsa = recipient.public_key ();
_data = dcp::Data (RSA_size(rsa));
int input_size = ECINEMA_KDM_KEY_LENGTH;
if (not_valid_before && not_valid_after) {
input_size += ECINEMA_KDM_NOT_VALID_BEFORE_LENGTH + ECINEMA_KDM_NOT_VALID_AFTER_LENGTH;
}
dcp::Data input (input_size);
memcpy (input.data().get(), content_key.value(), ECINEMA_KDM_KEY_LENGTH);
if (not_valid_before && not_valid_after) {
memcpy (input.data().get() + ECINEMA_KDM_NOT_VALID_BEFORE, not_valid_before->as_string().c_str(), ECINEMA_KDM_NOT_VALID_BEFORE_LENGTH);
memcpy (input.data().get() + ECINEMA_KDM_NOT_VALID_AFTER, not_valid_after->as_string().c_str(), ECINEMA_KDM_NOT_VALID_AFTER_LENGTH);
}
int const N = RSA_public_encrypt (input_size, input.data().get(), _data.data().get(), rsa, RSA_PKCS1_OAEP_PADDING);
if (N == -1) {
throw KDMError ("Could not encrypt ECinema KDM", ERR_error_string(ERR_get_error(), 0));
}
}
EncryptedECinemaKDM::EncryptedECinemaKDM (string xml)
{
cxml::Document doc ("ECinemaSecurityMessage");
doc.read_string (xml);
_id = doc.string_child ("Id");
_name = doc.string_child ("Name");
_data = dcp::Data (256);
int const len = dcp::base64_decode (doc.string_child("Data"), _data.data().get(), _data.size());
_data.set_size (len);
}
string
EncryptedECinemaKDM::as_xml () const
{
string key;
/* Lazy overallocation */
char out[_data.size() * 2];
Kumu::base64encode (_data.data().get(), _data.size(), out, _data.size() * 2);
int const N = strlen (out);
string lines;
for (int i = 0; i < N; ++i) {
if (i > 0 && (i % 64) == 0) {
lines += "\n";
}
lines += out[i];
}
xmlpp::Document document;
xmlpp::Element* root = document.create_root_node ("ECinemaSecurityMessage");
root->add_child("Id")->add_child_text(_id);
root->add_child("Name")->add_child_text(_name);
root->add_child("Data")->add_child_text(lines);
return document.write_to_string ("UTF-8");
}
void
EncryptedECinemaKDM::as_xml (boost::filesystem::path path) const
{
FILE* f = fopen_boost (path, "w");
string const x = as_xml ();
fwrite (x.c_str(), 1, x.length(), f);
fclose (f);
}
#endif
|
