Implementing MediaDrm APIs

Change-Id: I9ff8eeb7d0c383b5c0c68cd54eb54ce7d2d22fe6

10 files changed, 1186 insertions, 0 deletions

diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index 6b48991..1ada9c3 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -19,6 +19,7 @@ LOCAL_SRC_FILES:= \
     IAudioTrack.cpp \
     IAudioRecord.cpp \
     ICrypto.cpp \
+    IDrm.cpp \
     IHDCP.cpp \
     AudioRecord.cpp \
     AudioSystem.cpp \
diff --git a/media/libmedia/IDrm.cpp b/media/libmedia/IDrm.cpp
new file mode 100644
index 0000000..3b13ec6
--- /dev/null
+++ b/media/libmedia/IDrm.cpp
@@ -0,0 +1,551 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "IDrm"
+#include <utils/Log.h>
+
+#include <binder/Parcel.h>
+#include <media/IDrm.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/AString.h>
+
+namespace android {
+
+enum {
+    INIT_CHECK = IBinder::FIRST_CALL_TRANSACTION,
+    IS_CRYPTO_SUPPORTED,
+    CREATE_PLUGIN,
+    DESTROY_PLUGIN,
+    OPEN_SESSION,
+    CLOSE_SESSION,
+    GET_LICENSE_REQUEST,
+    PROVIDE_LICENSE_RESPONSE,
+    REMOVE_LICENSE,
+    QUERY_LICENSE_STATUS,
+    GET_PROVISION_REQUEST,
+    PROVIDE_PROVISION_RESPONSE,
+    GET_SECURE_STOPS,
+    RELEASE_SECURE_STOPS,
+    GET_PROPERTY_STRING,
+    GET_PROPERTY_BYTE_ARRAY,
+    SET_PROPERTY_STRING,
+    SET_PROPERTY_BYTE_ARRAY
+};
+
+struct BpDrm : public BpInterface<IDrm> {
+    BpDrm(const sp<IBinder> &impl)
+        : BpInterface<IDrm>(impl) {
+    }
+
+    virtual status_t initCheck() const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+        remote()->transact(INIT_CHECK, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+        data.write(uuid, 16);
+        remote()->transact(IS_CRYPTO_SUPPORTED, data, &reply);
+
+        return reply.readInt32() != 0;
+    }
+
+    virtual status_t createPlugin(const uint8_t uuid[16]) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+        data.write(uuid, 16);
+
+        remote()->transact(CREATE_PLUGIN, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t destroyPlugin() {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+        remote()->transact(DESTROY_PLUGIN, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t openSession(Vector<uint8_t> &sessionId) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        remote()->transact(OPEN_SESSION, data, &reply);
+        uint32_t size = reply.readInt32();
+        sessionId.insertAt((size_t)0, size);
+        reply.read(sessionId.editArray(), size);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t closeSession(Vector<uint8_t> const &sessionId) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(sessionId.size());
+        data.write(sessionId.array(), sessionId.size());
+        remote()->transact(CLOSE_SESSION, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t
+        getLicenseRequest(Vector<uint8_t> const &sessionId,
+                          Vector<uint8_t> const &initData,
+                          String8 const &mimeType, DrmPlugin::LicenseType licenseType,
+                          KeyedVector<String8, String8> const &optionalParameters,
+                          Vector<uint8_t> &request, String8 &defaultUrl) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(sessionId.size());
+        data.write(sessionId.array(), sessionId.size());
+
+        data.writeInt32(initData.size());
+        data.write(initData.array(), initData.size());
+
+        data.writeString8(mimeType);
+        data.writeInt32((uint32_t)licenseType);
+
+        data.writeInt32(optionalParameters.size());
+        for (size_t i = 0; i < optionalParameters.size(); ++i) {
+            data.writeString8(optionalParameters.keyAt(i));
+            data.writeString8(optionalParameters.valueAt(i));
+        }
+        remote()->transact(GET_LICENSE_REQUEST, data, &reply);
+
+        uint32_t len = reply.readInt32();
+        request.insertAt((size_t)0, len);
+        reply.read(request.editArray(), len);
+        defaultUrl = reply.readString8();
+
+        return reply.readInt32();
+    }
+
+    virtual status_t provideLicenseResponse(Vector<uint8_t> const &sessionId,
+                                            Vector<uint8_t> const &response) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(sessionId.size());
+        data.write(sessionId.array(), sessionId.size());
+        data.writeInt32(response.size());
+        data.write(response.array(), response.size());
+        remote()->transact(PROVIDE_LICENSE_RESPONSE, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t removeLicense(Vector<uint8_t> const &sessionId) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(sessionId.size());
+        data.write(sessionId.array(), sessionId.size());
+        remote()->transact(REMOVE_LICENSE, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t queryLicenseStatus(Vector<uint8_t> const &sessionId,
+                                        KeyedVector<String8, String8> &infoMap) const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(sessionId.size());
+        data.write(sessionId.array(), sessionId.size());
+
+        remote()->transact(QUERY_LICENSE_STATUS, data, &reply);
+
+        infoMap.clear();
+        size_t count = reply.readInt32();
+        for (size_t i = 0; i < count; i++) {
+            String8 key = reply.readString8();
+            String8 value = reply.readString8();
+            infoMap.add(key, value);
+        }
+        return reply.readInt32();
+    }
+
+    virtual status_t getProvisionRequest(Vector<uint8_t> &request,
+                                         String8 &defaultUrl) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        remote()->transact(GET_PROVISION_REQUEST, data, &reply);
+
+        uint32_t len = reply.readInt32();
+        request.insertAt((size_t)0, len);
+        reply.read(request.editArray(), len);
+        defaultUrl = reply.readString8();
+
+        return reply.readInt32();
+    }
+
+    virtual status_t provideProvisionResponse(Vector<uint8_t> const &response) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(response.size());
+        data.write(response.array(), response.size());
+        remote()->transact(PROVIDE_PROVISION_RESPONSE, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t getSecureStops(List<Vector<uint8_t> > &secureStops) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        remote()->transact(GET_SECURE_STOPS, data, &reply);
+
+        secureStops.clear();
+        uint32_t count = reply.readInt32();
+        for (size_t i = 0; i < count; i++) {
+            Vector<uint8_t> secureStop;
+            uint32_t len = reply.readInt32();
+            secureStop.insertAt((size_t)0, len);
+            reply.read(secureStop.editArray(), len);
+            secureStops.push_back(secureStop);
+        }
+        return reply.readInt32();
+    }
+
+    virtual status_t releaseSecureStops(Vector<uint8_t> const &ssRelease) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeInt32(ssRelease.size());
+        data.write(ssRelease.array(), ssRelease.size());
+        remote()->transact(RELEASE_SECURE_STOPS, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t getPropertyString(String8 const &name, String8 &value) const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeString8(name);
+        remote()->transact(GET_PROPERTY_STRING, data, &reply);
+
+        value = reply.readString8();
+        return reply.readInt32();
+    }
+
+    virtual status_t getPropertyByteArray(String8 const &name, Vector<uint8_t> &value) const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeString8(name);
+        remote()->transact(GET_PROPERTY_BYTE_ARRAY, data, &reply);
+
+        uint32_t len = reply.readInt32();
+        value.insertAt((size_t)0, len);
+        reply.read(value.editArray(), len);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t setPropertyString(String8 const &name, String8 const &value) const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeString8(name);
+        data.writeString8(value);
+        remote()->transact(SET_PROPERTY_STRING, data, &reply);
+
+        return reply.readInt32();
+    }
+
+    virtual status_t setPropertyByteArray(String8 const &name,
+                                          Vector<uint8_t> const &value) const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IDrm::getInterfaceDescriptor());
+
+        data.writeString8(name);
+        data.writeInt32(value.size());
+        data.write(value.array(), value.size());
+        remote()->transact(SET_PROPERTY_BYTE_ARRAY, data, &reply);
+
+        return reply.readInt32();
+    }
+
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(BpDrm);
+};
+
+IMPLEMENT_META_INTERFACE(Drm, "android.drm.IDrm");
+
+////////////////////////////////////////////////////////////////////////////////
+
+status_t BnDrm::onTransact(
+    uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags) {
+    switch (code) {
+        case INIT_CHECK:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            reply->writeInt32(initCheck());
+            return OK;
+        }
+
+        case IS_CRYPTO_SUPPORTED:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            uint8_t uuid[16];
+            data.read(uuid, sizeof(uuid));
+            reply->writeInt32(isCryptoSchemeSupported(uuid));
+            return OK;
+        }
+
+        case CREATE_PLUGIN:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            uint8_t uuid[16];
+            data.read(uuid, sizeof(uuid));
+            reply->writeInt32(createPlugin(uuid));
+            return OK;
+        }
+
+        case DESTROY_PLUGIN:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            reply->writeInt32(destroyPlugin());
+            return OK;
+        }
+
+        case OPEN_SESSION:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            status_t result = openSession(sessionId);
+            reply->writeInt32(sessionId.size());
+            reply->write(sessionId.array(), sessionId.size());
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case CLOSE_SESSION:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            uint32_t size = data.readInt32();
+            sessionId.insertAt((size_t)0, size);
+            data.read(sessionId.editArray(), size);
+            reply->writeInt32(closeSession(sessionId));
+            return OK;
+        }
+
+        case GET_LICENSE_REQUEST:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            uint32_t size = data.readInt32();
+            sessionId.insertAt((size_t)0, size);
+            data.read(sessionId.editArray(), size);
+
+            Vector<uint8_t> initData;
+            size = data.readInt32();
+            initData.insertAt((size_t)0, size);
+            data.read(initData.editArray(), size);
+
+            String8 mimeType = data.readString8();
+            DrmPlugin::LicenseType licenseType = (DrmPlugin::LicenseType)data.readInt32();
+
+            KeyedVector<String8, String8> optionalParameters;
+            uint32_t count = data.readInt32();
+            for (size_t i = 0; i < count; ++i) {
+                String8 key, value;
+                key = data.readString8();
+                value = data.readString8();
+                optionalParameters.add(key, value);
+            }
+
+            Vector<uint8_t> request;
+            String8 defaultUrl;
+
+            status_t result = getLicenseRequest(sessionId, initData,
+                                                mimeType, licenseType,
+                                                optionalParameters,
+                                                request, defaultUrl);
+            reply->writeInt32(request.size());
+            reply->write(request.array(), request.size());
+            reply->writeString8(defaultUrl);
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case PROVIDE_LICENSE_RESPONSE:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            uint32_t size = data.readInt32();
+            sessionId.insertAt((size_t)0, size);
+            data.read(sessionId.editArray(), size);
+            Vector<uint8_t> response;
+            size = data.readInt32();
+            response.insertAt((size_t)0, size);
+            data.read(response.editArray(), size);
+
+            reply->writeInt32(provideLicenseResponse(sessionId, response));
+            return OK;
+        }
+
+        case REMOVE_LICENSE:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            uint32_t size = data.readInt32();
+            sessionId.insertAt((size_t)0, size);
+            data.read(sessionId.editArray(), size);
+            reply->writeInt32(removeLicense(sessionId));
+            return OK;
+        }
+
+        case QUERY_LICENSE_STATUS:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> sessionId;
+            uint32_t size = data.readInt32();
+            sessionId.insertAt((size_t)0, size);
+            data.read(sessionId.editArray(), size);
+            KeyedVector<String8, String8> infoMap;
+
+            status_t result = queryLicenseStatus(sessionId, infoMap);
+
+            size_t count = infoMap.size();
+            reply->writeInt32(count);
+            for (size_t i = 0; i < count; ++i) {
+                reply->writeString8(infoMap.keyAt(i));
+                reply->writeString8(infoMap.valueAt(i));
+            }
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case GET_PROVISION_REQUEST:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> request;
+            String8 defaultUrl;
+            status_t result = getProvisionRequest(request, defaultUrl);
+            reply->writeInt32(request.size());
+            reply->write(request.array(), request.size());
+            reply->writeString8(defaultUrl);
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case PROVIDE_PROVISION_RESPONSE:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> response;
+            uint32_t size = data.readInt32();
+            response.insertAt((size_t)0, size);
+            data.read(response.editArray(), size);
+            reply->writeInt32(provideProvisionResponse(response));
+
+            return OK;
+        }
+
+        case GET_SECURE_STOPS:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            List<Vector<uint8_t> > secureStops;
+            status_t result = getSecureStops(secureStops);
+            size_t count = secureStops.size();
+            reply->writeInt32(count);
+            List<Vector<uint8_t> >::iterator iter = secureStops.begin();
+            while(iter != secureStops.end()) {
+                size_t size = iter->size();
+                reply->writeInt32(size);
+                reply->write(iter->array(), iter->size());
+            }
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case RELEASE_SECURE_STOPS:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            Vector<uint8_t> ssRelease;
+            uint32_t size = data.readInt32();
+            ssRelease.insertAt((size_t)0, size);
+            data.read(ssRelease.editArray(), size);
+            reply->writeInt32(releaseSecureStops(ssRelease));
+            return OK;
+        }
+
+        case GET_PROPERTY_STRING:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            String8 name = data.readString8();
+            String8 value;
+            status_t result = getPropertyString(name, value);
+            reply->writeString8(value);
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case GET_PROPERTY_BYTE_ARRAY:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            String8 name = data.readString8();
+            Vector<uint8_t> value;
+            status_t result = getPropertyByteArray(name, value);
+            reply->writeInt32(value.size());
+            reply->write(value.array(), value.size());
+            reply->writeInt32(result);
+            return OK;
+        }
+
+        case SET_PROPERTY_STRING:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            String8 name = data.readString8();
+            String8 value = data.readString8();
+            reply->writeInt32(setPropertyString(name, value));
+            return OK;
+        }
+
+        case SET_PROPERTY_BYTE_ARRAY:
+        {
+            CHECK_INTERFACE(IDrm, data, reply);
+            String8 name = data.readString8();
+            Vector<uint8_t> value;
+            size_t count = data.readInt32();
+            value.insertAt((size_t)0, count);
+            data.read(value.editArray(), count);
+            reply->writeInt32(setPropertyByteArray(name, value));
+            return OK;
+        }
+
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+}  // namespace android
+
diff --git a/media/libmedia/IMediaPlayerService.cpp b/media/libmedia/IMediaPlayerService.cpp
index a95f4c9..e1ce5a9 100644
--- a/media/libmedia/IMediaPlayerService.cpp
+++ b/media/libmedia/IMediaPlayerService.cpp
@@ -21,6 +21,7 @@
 #include <binder/Parcel.h>
 #include <binder/IMemory.h>
 #include <media/ICrypto.h>
+#include <media/IDrm.h>
 #include <media/IHDCP.h>
 #include <media/IMediaPlayerService.h>
 #include <media/IMediaRecorder.h>
@@ -42,6 +43,7 @@ enum {
     CREATE_METADATA_RETRIEVER,
     GET_OMX,
     MAKE_CRYPTO,
+    MAKE_DRM,
     MAKE_HDCP,
     ADD_BATTERY_DATA,
     PULL_BATTERY_DATA,
@@ -123,6 +125,13 @@ public:
         return interface_cast<ICrypto>(reply.readStrongBinder());
     }
 
+    virtual sp<IDrm> makeDrm() {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
+        remote()->transact(MAKE_DRM, data, &reply);
+        return interface_cast<IDrm>(reply.readStrongBinder());
+    }
+
     virtual sp<IHDCP> makeHDCP(bool createEncryptionModule) {
         Parcel data, reply;
         data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
@@ -225,6 +234,12 @@ status_t BnMediaPlayerService::onTransact(
             reply->writeStrongBinder(crypto->asBinder());
             return NO_ERROR;
         } break;
+        case MAKE_DRM: {
+            CHECK_INTERFACE(IMediaPlayerService, data, reply);
+            sp<IDrm> drm = makeDrm();
+            reply->writeStrongBinder(drm->asBinder());
+            return NO_ERROR;
+        } break;
         case MAKE_HDCP: {
             CHECK_INTERFACE(IMediaPlayerService, data, reply);
             bool createEncryptionModule = data.readInt32();
diff --git a/media/libmediaplayerservice/Android.mk b/media/libmediaplayerservice/Android.mk
index 48f48e4..2a6f3c7 100644
--- a/media/libmediaplayerservice/Android.mk
+++ b/media/libmediaplayerservice/Android.mk
@@ -9,6 +9,7 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES:=               \
     ActivityManager.cpp         \
     Crypto.cpp                  \
+    Drm.cpp                     \
     HDCP.cpp                    \
     MediaPlayerFactory.cpp      \
     MediaPlayerService.cpp      \
@@ -17,6 +18,7 @@ LOCAL_SRC_FILES:=               \
     MidiFile.cpp                \
     MidiMetadataRetriever.cpp   \
     RemoteDisplay.cpp           \
+    SharedLibrary.cpp           \
     StagefrightPlayer.cpp       \
     StagefrightRecorder.cpp     \
     TestPlayerStub.cpp          \
diff --git a/media/libmediaplayerservice/Drm.cpp b/media/libmediaplayerservice/Drm.cpp
new file mode 100644
index 0000000..6ac7530
--- /dev/null
+++ b/media/libmediaplayerservice/Drm.cpp
@@ -0,0 +1,423 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "Drm"
+#include <utils/Log.h>
+
+#include <dirent.h>
+#include <dlfcn.h>
+
+#include "Drm.h"
+
+#include <media/drm/DrmAPI.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/AString.h>
+#include <media/stagefright/foundation/hexdump.h>
+#include <media/stagefright/MediaErrors.h>
+
+namespace android {
+
+KeyedVector<Vector<uint8_t>, String8> Drm::mUUIDToLibraryPathMap;
+KeyedVector<String8, wp<SharedLibrary> > Drm::mLibraryPathToOpenLibraryMap;
+Mutex Drm::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;
+}
+
+Drm::Drm()
+    : mInitCheck(NO_INIT),
+      mFactory(NULL),
+      mPlugin(NULL) {
+}
+
+Drm::~Drm() {
+    delete mPlugin;
+    mPlugin = NULL;
+    closeFactory();
+}
+
+void Drm::closeFactory() {
+    delete mFactory;
+    mFactory = NULL;
+    mLibrary.clear();
+}
+
+status_t Drm::initCheck() const {
+    return mInitCheck;
+}
+
+
+/*
+ * 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 Drm::findFactoryForScheme(const uint8_t uuid[16]) {
+
+    closeFactory();
+
+    // lock static maps
+    Mutex::Autolock autoLock(mMapLock);
+
+    // 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;
+        }
+    }
+
+    // no luck, have to search
+    String8 dirPath("/vendor/lib/mediadrm");
+    DIR* pDir = opendir(dirPath.string());
+
+    if (pDir == NULL) {
+        mInitCheck = ERROR_UNSUPPORTED;
+        ALOGE("Failed to open plugin directory %s", dirPath.string());
+        return;
+    }
+
+
+    struct dirent* pEntry;
+    while ((pEntry = readdir(pDir))) {
+
+        String8 pluginPath = dirPath + "/" + pEntry->d_name;
+
+        if (pluginPath.getPathExtension() == ".so") {
+
+            if (loadLibraryForScheme(pluginPath, uuid)) {
+                mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
+                mInitCheck = OK;
+                closedir(pDir);
+                return;
+            }
+        }
+    }
+
+    closedir(pDir);
+
+    ALOGE("Failed to find drm plugin");
+    mInitCheck = ERROR_UNSUPPORTED;
+}
+
+bool Drm::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 {
+        index = mLibraryPathToOpenLibraryMap.add(path, NULL);
+    }
+
+    if (!mLibrary.get()) {
+        mLibrary = new SharedLibrary(path);
+        if (!*mLibrary) {
+            return false;
+        }
+
+        mLibraryPathToOpenLibraryMap.replaceValueAt(index, mLibrary);
+    }
+
+    typedef DrmFactory *(*CreateDrmFactoryFunc)();
+
+    CreateDrmFactoryFunc createDrmFactory =
+        (CreateDrmFactoryFunc)mLibrary->lookup("createDrmFactory");
+
+    if (createDrmFactory == NULL ||
+        (mFactory = createDrmFactory()) == NULL ||
+        !mFactory->isCryptoSchemeSupported(uuid)) {
+        closeFactory();
+        return false;
+    }
+    return true;
+}
+
+bool Drm::isCryptoSchemeSupported(const uint8_t uuid[16]) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mFactory && mFactory->isCryptoSchemeSupported(uuid)) {
+        return true;
+    }
+
+    findFactoryForScheme(uuid);
+    return (mInitCheck == OK);
+}
+
+status_t Drm::createPlugin(const uint8_t uuid[16]) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mPlugin != NULL) {
+        return -EINVAL;
+    }
+
+    if (!mFactory || !mFactory->isCryptoSchemeSupported(uuid)) {
+        findFactoryForScheme(uuid);
+    }
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    return mFactory->createDrmPlugin(uuid, &mPlugin);
+}
+
+status_t Drm::destroyPlugin() {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    delete mPlugin;
+    mPlugin = NULL;
+
+    return OK;
+}
+
+status_t Drm::openSession(Vector<uint8_t> &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->openSession(sessionId);
+}
+
+status_t Drm::closeSession(Vector<uint8_t> const &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->closeSession(sessionId);
+}
+
+status_t Drm::getLicenseRequest(Vector<uint8_t> const &sessionId,
+                                Vector<uint8_t> const &initData,
+                                String8 const &mimeType, DrmPlugin::LicenseType licenseType,
+                                KeyedVector<String8, String8> const &optionalParameters,
+                                Vector<uint8_t> &request, String8 &defaultUrl) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getLicenseRequest(sessionId, initData, mimeType, licenseType,
+                                      optionalParameters, request, defaultUrl);
+}
+
+status_t Drm::provideLicenseResponse(Vector<uint8_t> const &sessionId,
+                                     Vector<uint8_t> const &response) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->provideLicenseResponse(sessionId, response);
+}
+
+status_t Drm::removeLicense(Vector<uint8_t> const &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->removeLicense(sessionId);
+}
+
+status_t Drm::queryLicenseStatus(Vector<uint8_t> const &sessionId,
+                                 KeyedVector<String8, String8> &infoMap) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->queryLicenseStatus(sessionId, infoMap);
+}
+
+status_t Drm::getProvisionRequest(Vector<uint8_t> &request, String8 &defaultUrl) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getProvisionRequest(request, defaultUrl);
+}
+
+status_t Drm::provideProvisionResponse(Vector<uint8_t> const &response) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->provideProvisionResponse(response);
+}
+
+
+status_t Drm::getSecureStops(List<Vector<uint8_t> > &secureStops) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getSecureStops(secureStops);
+}
+
+status_t Drm::releaseSecureStops(Vector<uint8_t> const &ssRelease) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->releaseSecureStops(ssRelease);
+}
+
+status_t Drm::getPropertyString(String8 const &name, String8 &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getPropertyString(name, value);
+}
+
+status_t Drm::getPropertyByteArray(String8 const &name, Vector<uint8_t> &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getPropertyByteArray(name, value);
+}
+
+status_t Drm::setPropertyString(String8 const &name, String8 const &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->setPropertyString(name, value);
+}
+
+status_t Drm::setPropertyByteArray(String8 const &name,
+                                   Vector<uint8_t> const &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->setPropertyByteArray(name, value);
+}
+
+}  // namespace android
diff --git a/media/libmediaplayerservice/Drm.h b/media/libmediaplayerservice/Drm.h
new file mode 100644
index 0000000..1b10958
--- /dev/null
+++ b/media/libmediaplayerservice/Drm.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DRM_H_
+
+#define DRM_H_
+
+#include "SharedLibrary.h"
+
+#include <media/IDrm.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct DrmFactory;
+struct DrmPlugin;
+
+struct Drm : public BnDrm {
+    Drm();
+    virtual ~Drm();
+
+    virtual status_t initCheck() const;
+
+    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
+
+    virtual status_t createPlugin(const uint8_t uuid[16]);
+
+    virtual status_t destroyPlugin();
+
+    virtual status_t openSession(Vector<uint8_t> &sessionId);
+
+    virtual status_t closeSession(Vector<uint8_t> const &sessionId);
+
+    virtual status_t
+        getLicenseRequest(Vector<uint8_t> const &sessionId,
+                          Vector<uint8_t> const &initData,
+                          String8 const &mimeType, DrmPlugin::LicenseType licenseType,
+                          KeyedVector<String8, String8> const &optionalParameters,
+                          Vector<uint8_t> &request, String8 &defaultUrl);
+
+    virtual status_t provideLicenseResponse(Vector<uint8_t> const &sessionId,
+                                            Vector<uint8_t> const &response);
+
+    virtual status_t removeLicense(Vector<uint8_t> const &sessionId);
+
+    virtual status_t queryLicenseStatus(Vector<uint8_t> const &sessionId,
+                                        KeyedVector<String8, String8> &infoMap) const;
+
+    virtual status_t getProvisionRequest(Vector<uint8_t> &request,
+                                         String8 &defaulUrl);
+
+    virtual status_t provideProvisionResponse(Vector<uint8_t> const &response);
+
+    virtual status_t getSecureStops(List<Vector<uint8_t> > &secureStops);
+
+    virtual status_t releaseSecureStops(Vector<uint8_t> const &ssRelease);
+
+    virtual status_t getPropertyString(String8 const &name, String8 &value ) const;
+    virtual status_t getPropertyByteArray(String8 const &name,
+                                          Vector<uint8_t> &value ) const;
+    virtual status_t setPropertyString(String8 const &name, String8 const &value ) const;
+    virtual status_t setPropertyByteArray(String8 const &name,
+                                          Vector<uint8_t> const &value ) const;
+
+private:
+    mutable Mutex mLock;
+
+    status_t mInitCheck;
+    sp<SharedLibrary> mLibrary;
+    DrmFactory *mFactory;
+    DrmPlugin *mPlugin;
+
+    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(Drm);
+};
+
+}  // namespace android
+
+#endif  // CRYPTO_H_
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 16f1317..ec6ace1 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -72,6 +72,7 @@
 #include <OMX.h>
 
 #include "Crypto.h"
+#include "Drm.h"
 #include "HDCP.h"
 #include "RemoteDisplay.h"
 
@@ -285,6 +286,10 @@ sp<ICrypto> MediaPlayerService::makeCrypto() {
     return new Crypto;
 }
 
+sp<IDrm> MediaPlayerService::makeDrm() {
+    return new Drm;
+}
+
 sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
     return new HDCP(createEncryptionModule);
 }
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index 2d2a09d..82dc29b 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -249,6 +249,7 @@ public:
     virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
     virtual sp<IOMX>            getOMX();
     virtual sp<ICrypto>         makeCrypto();
+    virtual sp<IDrm>            makeDrm();
     virtual sp<IHDCP>           makeHDCP(bool createEncryptionModule);
 
     virtual sp<IRemoteDisplay> listenForRemoteDisplay(const sp<IRemoteDisplayClient>& client,
diff --git a/media/libmediaplayerservice/SharedLibrary.cpp b/media/libmediaplayerservice/SharedLibrary.cpp
new file mode 100644
index 0000000..178e15d
--- /dev/null
+++ b/media/libmediaplayerservice/SharedLibrary.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "Drm"
+#include <utils/Log.h>
+#include <media/stagefright/foundation/ADebug.h>
+
+#include <dlfcn.h>
+
+#include "SharedLibrary.h"
+
+namespace android {
+
+    SharedLibrary::SharedLibrary(const String8 &path) {
+        mLibHandle = dlopen(path.string(), RTLD_NOW);
+    }
+
+    SharedLibrary::~SharedLibrary() {
+        if (mLibHandle != NULL) {
+            dlclose(mLibHandle);
+            mLibHandle = NULL;
+        }
+    }
+
+    bool SharedLibrary::operator!() const {
+        return mLibHandle == NULL;
+    }
+
+    void *SharedLibrary::lookup(const char *symbol) const {
+        if (!mLibHandle) {
+            return NULL;
+        }
+        return dlsym(mLibHandle, symbol);
+    }
+};
diff --git a/media/libmediaplayerservice/SharedLibrary.h b/media/libmediaplayerservice/SharedLibrary.h
new file mode 100644
index 0000000..5353642
--- /dev/null
+++ b/media/libmediaplayerservice/SharedLibrary.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SHARED_LIBRARY_H_
+#define SHARED_LIBRARY_H_
+
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <media/stagefright/foundation/ABase.h>
+
+namespace android {
+    class SharedLibrary : public RefBase {
+    public:
+        SharedLibrary(const String8 &path);
+        ~SharedLibrary();
+
+        bool operator!() const;
+        void *lookup(const char *symbol) const;
+
+    private:
+        void *mLibHandle;
+        DISALLOW_EVIL_CONSTRUCTORS(SharedLibrary);
+    };
+};
+
+#endif // SHARED_LIBRARY_H_