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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=4 et :
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GMP_LOADER_H__
#define GMP_LOADER_H__
#include <stdint.h>
#include "prlink.h"
#include "gmp-entrypoints.h"
#include "mozilla/UniquePtr.h"
namespace mozilla {
namespace gmp {
class SandboxStarter {
public:
virtual ~SandboxStarter() {}
virtual bool Start(const char* aLibPath) = 0;
};
// Interface that adapts a plugin to the GMP API.
class GMPAdapter {
public:
virtual ~GMPAdapter() {}
// Sets the adapted to plugin library module.
// Note: the GMPAdapter is responsible for calling PR_UnloadLibrary on aLib
// when it's finished with it.
virtual void SetAdaptee(PRLibrary* aLib) = 0;
// These are called in place of the corresponding GMP API functions.
virtual GMPErr GMPInit(const GMPPlatformAPI* aPlatformAPI) = 0;
virtual GMPErr GMPGetAPI(const char* aAPIName,
void* aHostAPI,
void** aPluginAPI,
uint32_t aDecryptorId) = 0;
virtual void GMPShutdown() = 0;
virtual void GMPSetNodeId(const char* aNodeId, uint32_t aLength) = 0;
};
// Encapsulates generating the device-bound node id, activating the sandbox,
// loading the GMP, and passing the node id to the GMP (in that order).
//
// In Desktop Gecko, the implementation of this lives in plugin-container,
// and is passed into XUL code from on startup. The GMP IPC child protocol actor
// uses this interface to load and retrieve interfaces from the GMPs.
//
// In Desktop Gecko the implementation lives in the plugin-container so that
// it can be covered by DRM vendor's voucher.
//
// On Android the GMPLoader implementation lives in libxul (because for the time
// being GMPLoader relies upon NSPR, which we can't use in plugin-container
// on Android).
//
// There is exactly one GMPLoader per GMP child process, and only one GMP
// per child process (so the GMPLoader only loads one GMP).
//
// Load() takes an optional GMPAdapter which can be used to adapt non-GMPs
// to adhere to the GMP API.
class GMPLoader {
public:
virtual ~GMPLoader() {}
// Calculates the device-bound node id, then activates the sandbox,
// then loads the GMP library and (if applicable) passes the bound node id
// to the GMP. If aAdapter is non-null, the lib path is assumed to be
// a non-GMP, and the adapter is initialized with the lib and the adapter
// is used to interact with the plugin.
virtual bool Load(const char* aUTF8LibPath,
uint32_t aLibPathLen,
char* aOriginSalt,
uint32_t aOriginSaltLen,
const GMPPlatformAPI* aPlatformAPI,
GMPAdapter* aAdapter = nullptr) = 0;
// Retrieves an interface pointer from the GMP.
virtual GMPErr GetAPI(const char* aAPIName,
void* aHostAPI,
void** aPluginAPI,
uint32_t aDecryptorId) = 0;
// Calls the GMPShutdown function exported by the GMP lib, and unloads the
// plugin library.
virtual void Shutdown() = 0;
};
// On Desktop, this function resides in plugin-container.
// On Mobile, this function resides in XUL.
UniquePtr<GMPLoader> CreateGMPLoader(SandboxStarter* aStarter);
} // namespace gmp
} // namespace mozilla
#endif // GMP_LOADER_H__
|
