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961e7b4795e2c1dd6394f33a10c0a693b93bb67e
android/libwvdrmengine/mediadrm/src/WVDrmPlugin.cpp
John W. Bruce c85351682f SPOID 
(This is a merge of go/wvgerrit/23182)

This patch adds the framework for Stable Per-Origin Identifiers to the
CDM. Calculating SPOIDs will be done on the client-side, and they are
sent as part of the provisioning request. SPOIDs are also available to
the app as the Device Unique ID, replacing the previous method of
returning the actual Device Unique ID from the keybox / OEM certificate.

Different SPOIDs must use separate storage, just as different origins
already do. Support for this has been added to the Android adapter to the
CDM Core. However, the code in the Android glue layer that would drive
this behavior will be checked in in a separate change. As such, all
Android devices will continue using the legacy behavior even after this
patch goes in, until the glue layer code can be updated.

Bug: 27101531
Test: CE CDM Unit Tests
Test: Linux Jenkins Unit Tests
Test: Android Unit Tests (with and without SPOIDs forced on)
Test: Android GTS Tests
Change-Id: Ia0caf890381cbcb97504d08b19aeab8b29bd07ae
2017-01-25 15:45:01 -08:00

998 lines
34 KiB
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//
// Copyright 2013 Google Inc. All Rights Reserved.
//
//#define LOG_NDEBUG 0
#define LOG_TAG "WVCdm"
#include <utils/Log.h>
#include "WVDrmPlugin.h"
#include <endian.h>
#include <string.h>
#include <sstream>
#include <stdlib.h>
#include <string>
#include <vector>
#include "mapErrors-inl.h"
#include "media/stagefright/MediaErrors.h"
#include "utils/Errors.h"
#include "wv_cdm_constants.h"
namespace {
static const char* const kResetSecurityLevel = "";
static const char* const kEnable = "enable";
static const char* const kDisable = "disable";
static const std::string kPsshTag = "pssh";
static const char* const kSpecialUnprovisionResponse = "unprovision";
}
namespace wvdrm {
using namespace android;
using namespace std;
using namespace wvcdm;
namespace {
Vector<uint8_t> ToVector(const std::string& str) {
Vector<uint8_t> vector;
vector.appendArray(reinterpret_cast<const uint8_t*>(str.data()), str.size());
return vector;
}
DrmPlugin::KeyRequestType ConvertFromCdmKeyRequestType(
CdmKeyRequestType keyRequestType) {
switch (keyRequestType) {
case kKeyRequestTypeInitial:
return DrmPlugin::kKeyRequestType_Initial;
case kKeyRequestTypeRenewal:
return DrmPlugin::kKeyRequestType_Renewal;
case kKeyRequestTypeRelease:
return DrmPlugin::kKeyRequestType_Release;
default:
return DrmPlugin::kKeyRequestType_Unknown;
}
}
DrmPlugin::KeyStatusType ConvertFromCdmKeyStatus(CdmKeyStatus keyStatus) {
switch (keyStatus) {
case kKeyStatusUsable:
return DrmPlugin::kKeyStatusType_Usable;
case kKeyStatusExpired:
return DrmPlugin::kKeyStatusType_Expired;
case kKeyStatusOutputNotAllowed:
return DrmPlugin::kKeyStatusType_OutputNotAllowed;
case kKeyStatusPending:
return DrmPlugin::kKeyStatusType_StatusPending;
case kKeyStatusInternalError:
default:
return DrmPlugin::kKeyStatusType_InternalError;
}
}
} // namespace
WVDrmPlugin::WVDrmPlugin(const sp<WvContentDecryptionModule>& cdm,
WVGenericCryptoInterface* crypto)
: mCDM(cdm),
mCrypto(crypto),
mCryptoSessions(),
mCdmIdentifier(kDefaultCdmIdentifier) {}
WVDrmPlugin::~WVDrmPlugin() {
typedef map<CdmSessionId, CryptoSession>::iterator mapIterator;
for (mapIterator iter = mCryptoSessions.begin();
iter != mCryptoSessions.end();
++iter) {
CdmResponseType res = mCDM->CloseSession(iter->first);
if (!isCdmResponseTypeSuccess(res)) {
ALOGE("Failed to close session while destroying WVDrmPlugin");
}
}
mCryptoSessions.clear();
}
status_t WVDrmPlugin::openSession(Vector<uint8_t>& sessionId) {
CdmSessionId cdmSessionId;
CdmResponseType res =
mCDM->OpenSession("com.widevine", &mPropertySet, mCdmIdentifier, this,
&cdmSessionId);
if (!isCdmResponseTypeSuccess(res)) {
return mapAndNotifyOfCdmResponseType(sessionId, res);
}
bool success = false;
// Construct a CryptoSession
CdmQueryMap info;
res = mCDM->QueryOemCryptoSessionId(cdmSessionId, &info);
if (isCdmResponseTypeSuccess(res) &&
info.count(QUERY_KEY_OEMCRYPTO_SESSION_ID)) {
OEMCrypto_SESSION oecSessionId;
istringstream(info[QUERY_KEY_OEMCRYPTO_SESSION_ID]) >> oecSessionId;
mCryptoSessions[cdmSessionId] = CryptoSession(oecSessionId);
success = true;
} else {
ALOGE("Unable to query key control info.");
}
if (success) {
// Marshal Session ID
sessionId = ToVector(cdmSessionId);
return android::OK;
} else {
mCDM->CloseSession(cdmSessionId);
if (!isCdmResponseTypeSuccess(res)) {
// We got an error code we can return.
return mapAndNotifyOfCdmResponseType(sessionId, res);
} else {
// We got a failure that did not give us an error code, such as a failure
// of AttachEventListener() or the key being missing from the map.
return kErrorCDMGeneric;
}
}
}
status_t WVDrmPlugin::closeSession(const Vector<uint8_t>& sessionId) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
mCDM->CloseSession(cdmSessionId);
mCryptoSessions.erase(cdmSessionId);
return android::OK;
}
status_t WVDrmPlugin::getKeyRequest(
const Vector<uint8_t>& scope,
const Vector<uint8_t>& initData,
const String8& initDataType,
KeyType keyType,
const KeyedVector<String8, String8>& optionalParameters,
Vector<uint8_t>& request,
String8& defaultUrl,
KeyRequestType *keyRequestType) {
CdmLicenseType cdmLicenseType;
CdmSessionId cdmSessionId;
CdmKeySetId cdmKeySetId;
if (keyType == kKeyType_Offline) {
cdmLicenseType = kLicenseTypeOffline;
cdmSessionId.assign(scope.begin(), scope.end());
} else if (keyType == kKeyType_Streaming) {
cdmLicenseType = kLicenseTypeStreaming;
cdmSessionId.assign(scope.begin(), scope.end());
} else if (keyType == kKeyType_Release) {
cdmLicenseType = kLicenseTypeRelease;
cdmKeySetId.assign(scope.begin(), scope.end());
} else {
return android::ERROR_DRM_CANNOT_HANDLE;
}
string cdmInitDataType = initDataType.string();
// Provide backwards-compatibility for apps that pass non-EME-compatible MIME
// types.
if (!WvContentDecryptionModule::IsSupported(cdmInitDataType)) {
cdmInitDataType = wvcdm::ISO_BMFF_VIDEO_MIME_TYPE;
}
CdmInitData processedInitData;
if (initData.size() > 0 &&
WvContentDecryptionModule::IsCenc(cdmInitDataType) &&
!initDataResemblesPSSH(initData)) {
// This data was passed in the old format, pre-unwrapped. We need to wrap
// the init data in a new PSSH header.
static const uint8_t psshPrefix[] = {
0, 0, 0, 0, // Total size
'p', 's', 's', 'h', // "PSSH"
0, 0, 0, 0, // Flags - must be zero
0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE, // Widevine UUID
0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED,
0, 0, 0, 0 // Size of initData
};
processedInitData.assign(reinterpret_cast<const char*>(psshPrefix),
sizeof(psshPrefix) / sizeof(uint8_t));
processedInitData.append(reinterpret_cast<const char*>(initData.array()),
initData.size());
const size_t kPsshBoxSizeLocation = 0;
const size_t kInitDataSizeLocation =
sizeof(psshPrefix) - sizeof(uint32_t);
uint32_t psshBoxSize = htonl(processedInitData.size());
uint32_t initDataSize = htonl(initData.size());
memcpy(&processedInitData[kPsshBoxSizeLocation], &psshBoxSize,
sizeof(uint32_t));
memcpy(&processedInitData[kInitDataSizeLocation], &initDataSize,
sizeof(uint32_t));
} else {
// For other formats, we can pass the init data through unmodified.
processedInitData.assign(reinterpret_cast<const char*>(initData.array()),
initData.size());
}
CdmAppParameterMap cdmParameters;
for (size_t i = 0; i < optionalParameters.size(); ++i) {
const String8& key = optionalParameters.keyAt(i);
const String8& value = optionalParameters.valueAt(i);
string cdmKey(key.string(), key.size());
string cdmValue(value.string(), value.size());
cdmParameters[cdmKey] = cdmValue;
}
CdmKeyRequest keyRequest;
CdmResponseType res = mCDM->GenerateKeyRequest(
cdmSessionId, cdmKeySetId, cdmInitDataType, processedInitData,
cdmLicenseType, cdmParameters, &mPropertySet, mCdmIdentifier,
&keyRequest);
*keyRequestType = ConvertFromCdmKeyRequestType(keyRequest.type);
if (isCdmResponseTypeSuccess(res)) {
defaultUrl.clear();
defaultUrl.setTo(keyRequest.url.data(), keyRequest.url.size());
request = ToVector(keyRequest.message);
}
if (keyType == kKeyType_Release) {
// When releasing keys, we do not have a session ID.
return mapCdmResponseType(res);
} else {
// For all other requests, we have a session ID.
return mapAndNotifyOfCdmResponseType(scope, res);
}
}
status_t WVDrmPlugin::provideKeyResponse(
const Vector<uint8_t>& scope,
const Vector<uint8_t>& response,
Vector<uint8_t>& keySetId) {
CdmSessionId cdmSessionId;
CdmKeyResponse cdmResponse(response.begin(), response.end());
CdmKeySetId cdmKeySetId;
bool isRequest = (memcmp(scope.array(), SESSION_ID_PREFIX,
sizeof(SESSION_ID_PREFIX) - 1) == 0);
bool isRelease = (memcmp(scope.array(), KEY_SET_ID_PREFIX,
sizeof(KEY_SET_ID_PREFIX) - 1) == 0);
if (isRequest) {
cdmSessionId.assign(scope.begin(), scope.end());
} else if (isRelease) {
cdmKeySetId.assign(scope.begin(), scope.end());
} else {
return android::ERROR_DRM_CANNOT_HANDLE;
}
CdmResponseType res = mCDM->AddKey(cdmSessionId, cdmResponse, &cdmKeySetId);
if (isRequest && isCdmResponseTypeSuccess(res)) {
keySetId = ToVector(cdmKeySetId);
}
if (isRelease) {
// When releasing keys, we do not have a session ID.
return mapCdmResponseType(res);
} else {
// For all other requests, we have a session ID.
status_t status = mapAndNotifyOfCdmResponseType(scope, res);
// For "NEED_KEY," we still want to send the notifcation, but then we don't
// return the error. This is because "NEED_KEY" from AddKey() is an
// expected behavior when sending a privacy certificate.
if (res == wvcdm::NEED_KEY && mPropertySet.use_privacy_mode()) {
status = android::OK;
}
return status;
}
}
status_t WVDrmPlugin::removeKeys(const Vector<uint8_t>& sessionId) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
CdmResponseType res = mCDM->RemoveKeys(cdmSessionId);
return mapAndNotifyOfCdmResponseType(sessionId, res);
}
status_t WVDrmPlugin::restoreKeys(const Vector<uint8_t>& sessionId,
const Vector<uint8_t>& keySetId) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
CdmKeySetId cdmKeySetId(keySetId.begin(), keySetId.end());
CdmResponseType res = mCDM->RestoreKey(cdmSessionId, cdmKeySetId);
return mapAndNotifyOfCdmResponseType(sessionId, res);
}
status_t WVDrmPlugin::queryKeyStatus(
const Vector<uint8_t>& sessionId,
KeyedVector<String8, String8>& infoMap) const {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
CdmQueryMap cdmLicenseInfo;
CdmResponseType res = mCDM->QueryKeyStatus(cdmSessionId, &cdmLicenseInfo);
if (isCdmResponseTypeSuccess(res)) {
infoMap.clear();
for (CdmQueryMap::const_iterator iter = cdmLicenseInfo.begin();
iter != cdmLicenseInfo.end();
++iter) {
const string& cdmKey = iter->first;
const string& cdmValue = iter->second;
String8 key(cdmKey.data(), cdmKey.size());
String8 value(cdmValue.data(), cdmValue.size());
infoMap.add(key, value);
}
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::getProvisionRequest(const String8& cert_type,
const String8& cert_authority,
Vector<uint8_t>& request,
String8& defaultUrl) {
CdmProvisioningRequest cdmProvisionRequest;
string cdmDefaultUrl;
CdmCertificateType cdmCertType = kCertificateWidevine;
if (cert_type == "X.509") {
cdmCertType = kCertificateX509;
}
string cdmCertAuthority = cert_authority.string();
CdmResponseType res = mCDM->GetProvisioningRequest(cdmCertType,
cdmCertAuthority,
mCdmIdentifier,
&cdmProvisionRequest,
&cdmDefaultUrl);
if (isCdmResponseTypeSuccess(res)) {
request = ToVector(cdmProvisionRequest);
defaultUrl.clear();
defaultUrl.setTo(cdmDefaultUrl.data(), cdmDefaultUrl.size());
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::provideProvisionResponse(
const Vector<uint8_t>& response,
Vector<uint8_t>& certificate,
Vector<uint8_t>& wrapped_key) {
CdmProvisioningResponse cdmResponse(response.begin(), response.end());
if (cdmResponse == kSpecialUnprovisionResponse) {
if (mCdmIdentifier == kDefaultCdmIdentifier) {
return kErrorNoOriginSpecified;
}
return unprovision(mCdmIdentifier);
} else {
string cdmCertificate;
string cdmWrappedKey;
CdmResponseType res = mCDM->HandleProvisioningResponse(mCdmIdentifier,
cdmResponse,
&cdmCertificate,
&cdmWrappedKey);
if (isCdmResponseTypeSuccess(res)) {
certificate = ToVector(cdmCertificate);
wrapped_key = ToVector(cdmWrappedKey);
}
return mapCdmResponseType(res);
}
}
status_t WVDrmPlugin::unprovisionDevice() {
return unprovision(kDefaultCdmIdentifier);
}
status_t WVDrmPlugin::getSecureStop(const Vector<uint8_t>& ssid,
Vector<uint8_t>& secureStop) {
CdmUsageInfo cdmUsageInfo;
CdmSecureStopId cdmSsid(ssid.begin(), ssid.end());
CdmResponseType res = mCDM->GetUsageInfo(
mPropertySet.app_id(), cdmSsid, &cdmUsageInfo);
if (isCdmResponseTypeSuccess(res)) {
secureStop.clear();
for (CdmUsageInfo::const_iterator iter = cdmUsageInfo.begin();
iter != cdmUsageInfo.end();
++iter) {
const string& cdmStop = *iter;
secureStop.appendArray(reinterpret_cast<const uint8_t*>(cdmStop.data()),
cdmStop.size());
}
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::getSecureStops(List<Vector<uint8_t> >& secureStops) {
CdmUsageInfo cdmUsageInfo;
CdmResponseType res =
mCDM->GetUsageInfo(mPropertySet.app_id(), &cdmUsageInfo);
if (isCdmResponseTypeSuccess(res)) {
secureStops.clear();
for (CdmUsageInfo::const_iterator iter = cdmUsageInfo.begin();
iter != cdmUsageInfo.end();
++iter) {
const string& cdmStop = *iter;
secureStops.push_back(ToVector(cdmStop));
}
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::releaseAllSecureStops() {
CdmResponseType res = mCDM->ReleaseAllUsageInfo(mPropertySet.app_id());
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::releaseSecureStops(const Vector<uint8_t>& ssRelease) {
CdmUsageInfoReleaseMessage cdmMessage(ssRelease.begin(), ssRelease.end());
CdmResponseType res = mCDM->ReleaseUsageInfo(cdmMessage);
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::getPropertyString(const String8& name,
String8& value) const {
if (name == "vendor") {
value = "Google";
} else if (name == "version") {
value = "1.0";
} else if (name == "description") {
value = "Widevine CDM";
} else if (name == "algorithms") {
value = "AES/CBC/NoPadding,HmacSHA256";
} else if (name == "securityLevel") {
string requestedLevel = mPropertySet.security_level();
if (requestedLevel.length() > 0) {
value = requestedLevel.c_str();
} else {
return queryProperty(QUERY_KEY_SECURITY_LEVEL, value);
}
} else if (name == "systemId") {
return queryProperty(QUERY_KEY_SYSTEM_ID, value);
} else if (name == "privacyMode") {
if (mPropertySet.use_privacy_mode()) {
value = kEnable;
} else {
value = kDisable;
}
} else if (name == "sessionSharing") {
if (mPropertySet.is_session_sharing_enabled()) {
value = kEnable;
} else {
value = kDisable;
}
} else if (name == "hdcpLevel") {
return queryProperty(QUERY_KEY_CURRENT_HDCP_LEVEL, value);
} else if (name == "maxHdcpLevel") {
return queryProperty(QUERY_KEY_MAX_HDCP_LEVEL, value);
} else if (name == "usageReportingSupport") {
return queryProperty(QUERY_KEY_USAGE_SUPPORT, value);
} else if (name == "numberOfOpenSessions") {
return queryProperty(QUERY_KEY_NUMBER_OF_OPEN_SESSIONS, value);
} else if (name == "maxNumberOfSessions") {
return queryProperty(QUERY_KEY_MAX_NUMBER_OF_SESSIONS, value);
} else if (name == "oemCryptoApiVersion") {
return queryProperty(QUERY_KEY_OEMCRYPTO_API_VERSION, value);
} else if (name == "appId") {
value = mPropertySet.app_id().c_str();
} else if (name == "origin") {
value = mCdmIdentifier.origin.c_str();
} else {
ALOGE("App requested unknown string property %s", name.string());
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::getPropertyByteArray(const String8& name,
Vector<uint8_t>& value) const {
if (name == "deviceUniqueId") {
return queryProperty(QUERY_KEY_DEVICE_ID, value);
} else if (name == "provisioningUniqueId") {
return queryProperty(QUERY_KEY_PROVISIONING_ID, value);
} else if (name == "serviceCertificate") {
value = ToVector(mPropertySet.service_certificate());
} else {
ALOGE("App requested unknown byte array property %s", name.string());
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::setPropertyString(const String8& name,
const String8& value) {
if (name == "securityLevel") {
if (mCryptoSessions.size() == 0) {
if (value == QUERY_VALUE_SECURITY_LEVEL_L3.c_str()) {
mPropertySet.set_security_level(QUERY_VALUE_SECURITY_LEVEL_L3);
} else if (value == QUERY_VALUE_SECURITY_LEVEL_L1.c_str()) {
// We must be sure we CAN set the security level to L1.
std::string current_security_level;
status_t status =
queryProperty(kLevelDefault, QUERY_KEY_SECURITY_LEVEL,
current_security_level);
if (status != android::OK) return status;
if (current_security_level != QUERY_VALUE_SECURITY_LEVEL_L1) {
ALOGE("App requested L1 security on a non-L1 device.");
return android::BAD_VALUE;
} else {
mPropertySet.set_security_level(kResetSecurityLevel);
}
} else if (value == kResetSecurityLevel) {
mPropertySet.set_security_level(kResetSecurityLevel);
} else {
ALOGE("App requested invalid security level %s", value.string());
return android::BAD_VALUE;
}
} else {
ALOGE("App tried to change security level while sessions are open.");
return kErrorSessionIsOpen;
}
} else if (name == "privacyMode") {
if (value == kEnable) {
mPropertySet.set_use_privacy_mode(true);
} else if (value == kDisable) {
mPropertySet.set_use_privacy_mode(false);
} else {
ALOGE("App requested unknown privacy mode %s", value.string());
return android::BAD_VALUE;
}
} else if (name == "sessionSharing") {
if (mCryptoSessions.size() == 0) {
if (value == kEnable) {
mPropertySet.set_is_session_sharing_enabled(true);
} else if (value == kDisable) {
mPropertySet.set_is_session_sharing_enabled(false);
} else {
ALOGE("App requested unknown sharing type %s", value.string());
return android::BAD_VALUE;
}
} else {
ALOGE("App tried to change key sharing while sessions are open.");
return kErrorSessionIsOpen;
}
} else if (name == "appId") {
if (mCryptoSessions.size() == 0) {
mPropertySet.set_app_id(value.string());
} else {
ALOGE("App tried to set the application id while sessions are opened.");
return kErrorSessionIsOpen;
}
} else if (name == "origin") {
if (mCryptoSessions.size() != 0) {
ALOGE("App tried to set the origin while sessions are opened.");
return kErrorSessionIsOpen;
} else {
mCdmIdentifier.origin = value.string();
}
} else {
ALOGE("App set unknown string property %s", name.string());
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::setPropertyByteArray(const String8& name,
const Vector<uint8_t>& value) {
if (name == "serviceCertificate") {
std::string cert(value.begin(), value.end());
if (value.isEmpty() || mCDM->IsValidServiceCertificate(cert)) {
mPropertySet.set_service_certificate(cert);
} else {
return android::BAD_VALUE;
}
} else {
ALOGE("App set unknown byte array property %s", name.string());
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::setCipherAlgorithm(const Vector<uint8_t>& sessionId,
const String8& algorithm) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (algorithm == "AES/CBC/NoPadding") {
cryptoSession.setCipherAlgorithm(OEMCrypto_AES_CBC_128_NO_PADDING);
} else {
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::setMacAlgorithm(const Vector<uint8_t>& sessionId,
const String8& algorithm) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (algorithm == "HmacSHA256") {
cryptoSession.setMacAlgorithm(OEMCrypto_HMAC_SHA256);
} else {
return android::ERROR_DRM_CANNOT_HANDLE;
}
return android::OK;
}
status_t WVDrmPlugin::encrypt(const Vector<uint8_t>& sessionId,
const Vector<uint8_t>& keyId,
const Vector<uint8_t>& input,
const Vector<uint8_t>& iv,
Vector<uint8_t>& output) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
const CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (cryptoSession.cipherAlgorithm() == kInvalidCryptoAlgorithm) {
return android::NO_INIT;
}
OEMCryptoResult res = mCrypto->selectKey(cryptoSession.oecSessionId(),
keyId.array(), keyId.size());
if (res != OEMCrypto_SUCCESS) {
ALOGE("OEMCrypto_SelectKey failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
output.resize(input.size());
res = mCrypto->encrypt(cryptoSession.oecSessionId(), input.array(),
input.size(), iv.array(),
cryptoSession.cipherAlgorithm(), output.editArray());
if (res == OEMCrypto_SUCCESS) {
return android::OK;
} else {
ALOGE("OEMCrypto_Generic_Encrypt failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
}
status_t WVDrmPlugin::decrypt(const Vector<uint8_t>& sessionId,
const Vector<uint8_t>& keyId,
const Vector<uint8_t>& input,
const Vector<uint8_t>& iv,
Vector<uint8_t>& output) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
const CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (cryptoSession.cipherAlgorithm() == kInvalidCryptoAlgorithm) {
return android::NO_INIT;
}
OEMCryptoResult res = mCrypto->selectKey(cryptoSession.oecSessionId(),
keyId.array(), keyId.size());
if (res != OEMCrypto_SUCCESS) {
ALOGE("OEMCrypto_SelectKey failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
output.resize(input.size());
res = mCrypto->decrypt(cryptoSession.oecSessionId(), input.array(),
input.size(), iv.array(),
cryptoSession.cipherAlgorithm(), output.editArray());
if (res == OEMCrypto_SUCCESS) {
return android::OK;
} else {
ALOGE("OEMCrypto_Generic_Decrypt failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
}
status_t WVDrmPlugin::sign(const Vector<uint8_t>& sessionId,
const Vector<uint8_t>& keyId,
const Vector<uint8_t>& message,
Vector<uint8_t>& signature) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
const CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (cryptoSession.macAlgorithm() == kInvalidCryptoAlgorithm) {
return android::NO_INIT;
}
OEMCryptoResult res = mCrypto->selectKey(cryptoSession.oecSessionId(),
keyId.array(), keyId.size());
if (res != OEMCrypto_SUCCESS) {
ALOGE("OEMCrypto_SelectKey failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
size_t signatureSize = 0;
res = mCrypto->sign(cryptoSession.oecSessionId(), message.array(),
message.size(), cryptoSession.macAlgorithm(),
NULL, &signatureSize);
if (res != OEMCrypto_ERROR_SHORT_BUFFER) {
ALOGE("OEMCrypto_Generic_Sign failed with %u when requesting signature "
"size", res);
if (res != OEMCrypto_SUCCESS) {
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
} else {
return android::ERROR_DRM_UNKNOWN;
}
}
signature.resize(signatureSize);
res = mCrypto->sign(cryptoSession.oecSessionId(), message.array(),
message.size(), cryptoSession.macAlgorithm(),
signature.editArray(), &signatureSize);
if (res == OEMCrypto_SUCCESS) {
return android::OK;
} else {
ALOGE("OEMCrypto_Generic_Sign failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
}
status_t WVDrmPlugin::verify(const Vector<uint8_t>& sessionId,
const Vector<uint8_t>& keyId,
const Vector<uint8_t>& message,
const Vector<uint8_t>& signature,
bool& match) {
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
if (!mCryptoSessions.count(cdmSessionId)) {
return android::ERROR_DRM_SESSION_NOT_OPENED;
}
const CryptoSession& cryptoSession = mCryptoSessions[cdmSessionId];
if (cryptoSession.macAlgorithm() == kInvalidCryptoAlgorithm) {
return android::NO_INIT;
}
OEMCryptoResult res = mCrypto->selectKey(cryptoSession.oecSessionId(),
keyId.array(), keyId.size());
if (res != OEMCrypto_SUCCESS) {
ALOGE("OEMCrypto_SelectKey failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
res = mCrypto->verify(cryptoSession.oecSessionId(), message.array(),
message.size(), cryptoSession.macAlgorithm(),
signature.array(), signature.size());
if (res == OEMCrypto_SUCCESS) {
match = true;
return android::OK;
} else if (res == OEMCrypto_ERROR_SIGNATURE_FAILURE) {
match = false;
return android::OK;
} else {
ALOGE("OEMCrypto_Generic_Verify failed with %u", res);
return mapAndNotifyOfOEMCryptoResult(sessionId, res);
}
}
status_t WVDrmPlugin::signRSA(const Vector<uint8_t>& /* sessionId */,
const String8& algorithm,
const Vector<uint8_t>& message,
const Vector<uint8_t>& wrappedKey,
Vector<uint8_t>& signature) {
RSA_Padding_Scheme padding_scheme;
if (algorithm == "RSASSA-PSS-SHA1") {
padding_scheme = kSign_RSASSA_PSS;
} else if (algorithm == "PKCS1-BlockType1") {
padding_scheme = kSign_PKCS1_Block1;
} else {
ALOGE("Unknown RSA Algorithm %s", algorithm.string());
return android::ERROR_DRM_CANNOT_HANDLE;
}
OEMCryptoResult res = mCrypto->signRSA(wrappedKey.array(),
wrappedKey.size(),
message.array(), message.size(),
signature,
padding_scheme);
if (res != OEMCrypto_SUCCESS) {
ALOGE("OEMCrypto_GenerateRSASignature failed with %u", res);
return mapOEMCryptoResult(res);
}
return android::OK;
}
void WVDrmPlugin::OnSessionRenewalNeeded(const CdmSessionId& cdmSessionId) {
Vector<uint8_t> sessionId = ToVector(cdmSessionId);
sendEvent(kDrmPluginEventKeyNeeded, 0, &sessionId, NULL);
}
void WVDrmPlugin::OnSessionKeysChange(const CdmSessionId& cdmSessionId,
const CdmKeyStatusMap& cdmKeysStatus,
bool hasNewUsableKey) {
bool expired = false;
Vector<KeyStatus> keyStatusList;
for (CdmKeyStatusMap::const_iterator it = cdmKeysStatus.begin();
it != cdmKeysStatus.end(); ++it) {
const KeyId& keyId = it->first;
const CdmKeyStatus cdmKeyStatus = it->second;
if (cdmKeyStatus == kKeyStatusExpired) expired = true;
keyStatusList.push(
{ToVector(keyId), ConvertFromCdmKeyStatus(cdmKeyStatus)});
}
Vector<uint8_t> sessionId = ToVector(cdmSessionId);
sendKeysChange(&sessionId, &keyStatusList, hasNewUsableKey);
// For backward compatibility.
if (expired) sendEvent(kDrmPluginEventKeyExpired, 0, &sessionId, NULL);
}
void WVDrmPlugin::OnExpirationUpdate(const CdmSessionId& cdmSessionId,
int64_t newExpiryTimeSeconds) {
Vector<uint8_t> sessionId = ToVector(cdmSessionId);
int64_t newExpiryTimeMilliseconds = newExpiryTimeSeconds == NEVER_EXPIRES
? newExpiryTimeSeconds
: newExpiryTimeSeconds * 1000;
sendExpirationUpdate(&sessionId, newExpiryTimeMilliseconds);
}
status_t WVDrmPlugin::queryProperty(const std::string& property,
std::string& stringValue) const {
SecurityLevel securityLevel =
mPropertySet.security_level().compare(QUERY_VALUE_SECURITY_LEVEL_L3) == 0
? kLevel3
: kLevelDefault;
return queryProperty(securityLevel, property, stringValue);
}
status_t WVDrmPlugin::queryProperty(SecurityLevel securityLevel,
const std::string& property,
std::string& stringValue) const {
CdmResponseType res =
mCDM->QueryStatus(securityLevel, property, &stringValue);
if (res != wvcdm::NO_ERROR) {
ALOGE("Error querying CDM status: %u", res);
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::queryProperty(const std::string& property,
String8& string8_value) const {
std::string string_value;
status_t status = queryProperty(property, string_value);
if (status != android::OK) return status;
string8_value = string_value.c_str();
return android::OK;
}
status_t WVDrmPlugin::queryProperty(const std::string& property,
Vector<uint8_t>& vector_value) const {
std::string string_value;
status_t status = queryProperty(property, string_value);
if (status != android::OK) return status;
vector_value = ToVector(string_value);
return android::OK;
}
status_t WVDrmPlugin::mapAndNotifyOfCdmResponseType(
const Vector<uint8_t>& sessionId,
CdmResponseType res) {
if (res == wvcdm::NEED_PROVISIONING) {
sendEvent(kDrmPluginEventProvisionRequired, 0, &sessionId, NULL);
} else if (res == wvcdm::NEED_KEY) {
sendEvent(kDrmPluginEventKeyNeeded, 0, &sessionId, NULL);
}
return mapCdmResponseType(res);
}
status_t WVDrmPlugin::mapAndNotifyOfOEMCryptoResult(
const Vector<uint8_t>& sessionId,
OEMCryptoResult res) {
if (res == OEMCrypto_ERROR_NO_DEVICE_KEY) {
sendEvent(kDrmPluginEventProvisionRequired, 0, &sessionId, NULL);
}
return mapOEMCryptoResult(res);
}
status_t WVDrmPlugin::mapOEMCryptoResult(OEMCryptoResult res) {
switch (res) {
case OEMCrypto_SUCCESS:
return android::OK;
case OEMCrypto_ERROR_SIGNATURE_FAILURE:
return android::ERROR_DRM_TAMPER_DETECTED;
case OEMCrypto_ERROR_SHORT_BUFFER:
return kErrorIncorrectBufferSize;
case OEMCrypto_ERROR_NO_DEVICE_KEY:
return android::ERROR_DRM_NOT_PROVISIONED;
case OEMCrypto_ERROR_INVALID_SESSION:
return android::ERROR_DRM_SESSION_NOT_OPENED;
case OEMCrypto_ERROR_TOO_MANY_SESSIONS:
return android::ERROR_DRM_RESOURCE_BUSY;
case OEMCrypto_ERROR_INVALID_RSA_KEY:
return kErrorInvalidKey;
case OEMCrypto_ERROR_INSUFFICIENT_RESOURCES:
return android::ERROR_DRM_RESOURCE_BUSY;
case OEMCrypto_ERROR_NOT_IMPLEMENTED:
return android::ERROR_DRM_CANNOT_HANDLE;
case OEMCrypto_ERROR_UNKNOWN_FAILURE:
case OEMCrypto_ERROR_OPEN_SESSION_FAILED:
return android::ERROR_DRM_UNKNOWN;
default:
return android::UNKNOWN_ERROR;
}
}
bool WVDrmPlugin::initDataResemblesPSSH(const Vector<uint8_t>& initData) {
const uint8_t* const initDataArray = initData.array();
// Extract the size field
const uint8_t* const sizeField = &initDataArray[0];
uint32_t nboSize;
memcpy(&nboSize, sizeField, sizeof(nboSize));
uint32_t size = ntohl(nboSize);
if (size > initData.size()) {
return false;
}
// Extract the ID field
const char* const idField =
reinterpret_cast<const char* const>(&initDataArray[sizeof(nboSize)]);
string id(idField, kPsshTag.size());
return id == kPsshTag;
}
status_t WVDrmPlugin::unprovision(const CdmIdentifier& identifier) {
CdmResponseType res1 = mCDM->Unprovision(kSecurityLevelL1, identifier);
CdmResponseType res3 = mCDM->Unprovision(kSecurityLevelL3, identifier);
if (!isCdmResponseTypeSuccess(res1))
{
return mapCdmResponseType(res1);
}
else
{
return mapCdmResponseType(res3);
}
}
} // namespace wvdrm
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