am 351f28e2: Merge "Load crypto plugins from additional shared libraries" into jb-mr2-dev (2fd1f152) · Commits · e / os / android_frameworks_av

include/media/ICrypto.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -31,7 +31,7 @@ struct ICrypto : public IInterface {

		virtual status_t initCheck() const = 0;

		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) const = 0;
		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) = 0;

		virtual status_t createPlugin(
		const uint8_t uuid[16], const void *data, size_t size) = 0;

media/libmedia/ICrypto.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -48,7 +48,7 @@ struct BpCrypto : public BpInterface<ICrypto> {
		return reply.readInt32();
		}

		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) const {
		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) {
		Parcel data, reply;
		data.writeInterfaceToken(ICrypto::getInterfaceDescriptor());
		data.write(uuid, 16);

media/libmediaplayerservice/Crypto.cpp

+126 −35

Original line number	Diff line number	Diff line
		@@ -17,6 +17,8 @@
		//#define LOG_NDEBUG 0
		#define LOG_TAG "Crypto"
		#include <utils/Log.h>
		#include <dirent.h>
		#include <dlfcn.h>

		#include "Crypto.h"

		@@ -26,87 +28,176 @@
		#include <media/stagefright/foundation/hexdump.h>
		#include <media/stagefright/MediaErrors.h>

		#include <dlfcn.h>

		namespace android {

		KeyedVector<Vector<uint8_t>, String8> Crypto::mUUIDToLibraryPathMap;
		KeyedVector<String8, wp<SharedLibrary> > Crypto::mLibraryPathToOpenLibraryMap;
		Mutex Crypto::mMapLock;

		static bool operator<(const Vector<uint8_t> &lhs, const Vector<uint8_t> &rhs) {
		if (lhs.size() < rhs.size()) {
		return true;
		} else if (lhs.size() > rhs.size()) {
		return false;
		}

		return memcmp((void )lhs.array(), (void )rhs.array(), rhs.size()) < 0;
		}

		Crypto::Crypto()
		: mInitCheck(NO_INIT),
		mLibHandle(NULL),
		mFactory(NULL),
		mPlugin(NULL) {
		mInitCheck = init();
		}

		Crypto::~Crypto() {
		delete mPlugin;
		mPlugin = NULL;
		closeFactory();
		}

		void Crypto::closeFactory() {
		delete mFactory;
		mFactory = NULL;

		if (mLibHandle != NULL) {
		dlclose(mLibHandle);
		mLibHandle = NULL;
		}
		mLibrary.clear();
		}

		status_t Crypto::initCheck() const {
		return mInitCheck;
		}

		status_t Crypto::init() {
		mLibHandle = dlopen("libdrmdecrypt.so", RTLD_NOW);
		/*
		* Search the plugins directory for a plugin that supports the scheme
		* specified by uuid
		*
		* If found:
		* mLibrary holds a strong pointer to the dlopen'd library
		* mFactory is set to the library's factory method
		* mInitCheck is set to OK
		*
		* If not found:
		* mLibrary is cleared and mFactory are set to NULL
		* mInitCheck is set to an error (!OK)
		*/
		void Crypto::findFactoryForScheme(const uint8_t uuid[16]) {

		closeFactory();

		if (mLibHandle == NULL) {
		ALOGE("Unable to locate libdrmdecrypt.so");
		// lock static maps
		Mutex::Autolock autoLock(mMapLock);

		return ERROR_UNSUPPORTED;
		// first check cache
		Vector<uint8_t> uuidVector;
		uuidVector.appendArray(uuid, sizeof(uuid));
		ssize_t index = mUUIDToLibraryPathMap.indexOfKey(uuidVector);
		if (index >= 0) {
		if (loadLibraryForScheme(mUUIDToLibraryPathMap[index], uuid)) {
		mInitCheck = OK;
		return;
		} else {
		ALOGE("Failed to load from cached library path!");
		mInitCheck = ERROR_UNSUPPORTED;
		return;
		}
		}

		typedef CryptoFactory (CreateCryptoFactoryFunc)();
		CreateCryptoFactoryFunc createCryptoFactory =
		(CreateCryptoFactoryFunc)dlsym(mLibHandle, "createCryptoFactory");
		// no luck, have to search
		String8 dirPath("/vendor/lib/mediadrm");
		String8 pluginPath;

		DIR* pDir = opendir(dirPath.string());
		if (pDir) {
		struct dirent* pEntry;
		while ((pEntry = readdir(pDir))) {

		pluginPath = dirPath + "/" + pEntry->d_name;

		if (pluginPath.getPathExtension() == ".so") {

		if (loadLibraryForScheme(pluginPath, uuid)) {
		mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
		mInitCheck = OK;
		closedir(pDir);
		return;
		}
		}
		}

		if (createCryptoFactory == NULL
		\|\| ((mFactory = createCryptoFactory()) == NULL)) {
		if (createCryptoFactory == NULL) {
		ALOGE("Unable to find symbol 'createCryptoFactory'.");
		closedir(pDir);
		}

		// try the legacy libdrmdecrypt.so
		pluginPath = "libdrmdecrypt.so";
		if (loadLibraryForScheme(pluginPath, uuid)) {
		mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
		mInitCheck = OK;
		return;
		}

		ALOGE("Failed to find crypto plugin");
		mInitCheck = ERROR_UNSUPPORTED;
		}

		bool Crypto::loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]) {

		// get strong pointer to open shared library
		ssize_t index = mLibraryPathToOpenLibraryMap.indexOfKey(path);
		if (index >= 0) {
		mLibrary = mLibraryPathToOpenLibraryMap[index].promote();
		} else {
		ALOGE("createCryptoFactory() failed.");
		index = mLibraryPathToOpenLibraryMap.add(path, NULL);
		}

		dlclose(mLibHandle);
		mLibHandle = NULL;
		if (!mLibrary.get()) {
		mLibrary = new SharedLibrary(path);
		if (!*mLibrary) {
		return false;
		}

		return ERROR_UNSUPPORTED;
		mLibraryPathToOpenLibraryMap.replaceValueAt(index, mLibrary);
		}

		return OK;
		typedef CryptoFactory (CreateCryptoFactoryFunc)();

		CreateCryptoFactoryFunc createCryptoFactory =
		(CreateCryptoFactoryFunc)mLibrary->lookup("createCryptoFactory");

		if (createCryptoFactory == NULL \|\|
		(mFactory = createCryptoFactory()) == NULL \|\|
		!mFactory->isCryptoSchemeSupported(uuid)) {
		closeFactory();
		return false;
		}
		return true;
		}

		bool Crypto::isCryptoSchemeSupported(const uint8_t uuid[16]) const {
		bool Crypto::isCryptoSchemeSupported(const uint8_t uuid[16]) {
		Mutex::Autolock autoLock(mLock);

		if (mInitCheck != OK) {
		return false;
		if (mFactory && mFactory->isCryptoSchemeSupported(uuid)) {
		return true;
		}

		return mFactory->isCryptoSchemeSupported(uuid);
		findFactoryForScheme(uuid);
		return (mInitCheck == OK);
		}

		status_t Crypto::createPlugin(
		const uint8_t uuid[16], const void *data, size_t size) {
		Mutex::Autolock autoLock(mLock);

		if (mInitCheck != OK) {
		return mInitCheck;
		}

		if (mPlugin != NULL) {
		return -EINVAL;
		}

		if (!mFactory \|\| !mFactory->isCryptoSchemeSupported(uuid)) {
		findFactoryForScheme(uuid);
		}

		if (mInitCheck != OK) {
		return mInitCheck;
		}

		return mFactory->createPlugin(uuid, data, size, &mPlugin);
		}

media/libmediaplayerservice/Crypto.h

+12 −3

Original line number	Diff line number	Diff line
		@@ -20,6 +20,9 @@

		#include <media/ICrypto.h>
		#include <utils/threads.h>
		#include <utils/KeyedVector.h>

		#include "SharedLibrary.h"

		namespace android {

		@@ -32,7 +35,7 @@ struct Crypto : public BnCrypto {

		virtual status_t initCheck() const;

		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) const;
		virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);

		virtual status_t createPlugin(
		const uint8_t uuid[16], const void *data, size_t size);
		@@ -56,11 +59,17 @@ private:
		mutable Mutex mLock;

		status_t mInitCheck;
		void *mLibHandle;
		sp<SharedLibrary> mLibrary;
		CryptoFactory *mFactory;
		CryptoPlugin *mPlugin;

		status_t init();
		static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
		static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
		static Mutex mMapLock;

		void findFactoryForScheme(const uint8_t uuid[16]);
		bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
		void closeFactory();

		DISALLOW_EVIL_CONSTRUCTORS(Crypto);
		};