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) 2020 Metrological Group B.V.
* Copyright (C) 2020 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CDMProxyThunder.h"
#if ENABLE(ENCRYPTED_MEDIA) && ENABLE(THUNDER)
#include "CDMThunder.h"
#include "Logging.h"
#include <open_cdm_adapter.h>
#include <wtf/ByteOrder.h>
GST_DEBUG_CATEGORY_EXTERN(webkitMediaThunderDecryptDebugCategory);
#define GST_CAT_DEFAULT webkitMediaThunderDecryptDebugCategory
namespace WebCore {
// NOTE: YouTube 2019 EME conformance tests expect this to be >=5s.
const Seconds s_licenseKeyResponseTimeout = Seconds(6);
BoxPtr<OpenCDMSession> CDMProxyThunder::getDecryptionSession(DecryptionContext& in) const
{
GstMappedBuffer mappedKeyID(in.keyIDBuffer, GST_MAP_READ);
if (!mappedKeyID) {
GST_ERROR("Failed to map key ID buffer");
return nullptr;
}
auto keyID = mappedKeyID.createVector();
auto keyHandle = getOrWaitForKeyHandle(keyID, WTFMove(in.cdmProxyDecryptionClient));
if (!keyHandle.has_value() || !keyHandle.value()->isStatusCurrentlyValid())
return nullptr;
KeyHandleValueVariant keyData = keyHandle.value()->value();
ASSERT(std::holds_alternative<BoxPtr<OpenCDMSession>>(keyData));
BoxPtr<OpenCDMSession> keyValue = std::get<BoxPtr<OpenCDMSession>>(keyData);
if (!keyValue) {
keyValue = adoptInBoxPtr(opencdm_get_system_session(&static_cast<const CDMInstanceThunder*>(instance())->thunderSystem(), keyID.data(),
keyID.size(), s_licenseKeyResponseTimeout.millisecondsAs<uint32_t>()));
ASSERT(keyValue);
// takeValueIfDifferent takes and r-value ref of
// KeyHandleValueVariant. We want to copy the BoxPtr when
// passing it down, cause we return it from this method. If we
// just don't move the BoxPtr, the const BoxPtr& constructor
// will be used. Anyway, letting that subtlety to the compiler
// could be misleading so we explicitly invoke the const
// BoxPtr& constructor here.
keyHandle.value()->takeValueIfDifferent(BoxPtr<OpenCDMSession>(keyValue));
}
return keyValue;
}
bool CDMProxyThunder::decrypt(CDMProxyThunder::DecryptionContext& input, const GRefPtr<GstCaps>& inputCaps)
{
BoxPtr<OpenCDMSession> session = getDecryptionSession(input);
if (!session) {
GST_WARNING("there is no valid session to decrypt for the provided key ID (or the operation was aborted)");
return false;
}
GST_TRACE("decrypting");
OpenCDMError errorCode;
#if THUNDER_HAS_OCDM_DECRYPT_BUFFER
RELEASE_ASSERT_WITH_MESSAGE(inputCaps, "Decryption attempted without input caps");
errorCode = opencdm_gstreamer_session_decrypt_buffer(session->get(), input.dataBuffer, inputCaps.get());
#else
UNUSED_PARAM(inputCaps);
errorCode = opencdm_gstreamer_session_decrypt(session->get(), input.dataBuffer, input.subsamplesBuffer, input.numSubsamples,
input.ivBuffer, input.keyIDBuffer, 0);
#endif
if (errorCode) {
GST_ERROR("decryption failed, error code %X", errorCode);
return false;
}
return true;
}
#undef GST_CAT_DEFAULT
} // namespace WebCore
#endif // ENABLE(ENCRYPTED_MEDIA) && ENABLE(THUNDER)
|
