c5f576585b
Implements the optional setMediaDrmSession() method. To enble this, support was added to the core to report if a session ID is valid. As a consequence of this, in the tests for the CryptoPlugin, construction of the plugin must be deferred until all gMock expectations are set, as construction now calls into the CDM core. This is a merge of two changes from the Widevine CDM repo: http://go/wvgerrit/14083 Allow Setting of Session ID http://go/wvgerrit/14085 Check If Session ID Is Valid When Changing CryptoPlugin IDs Bug: 19570317 Change-Id: I7dbd777ce6efebd71fdb5e602663a0e35a48a9c4
499 lines
17 KiB
C++
499 lines
17 KiB
C++
//
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// Copyright 2013 Google Inc. All Rights Reserved.
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//
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#include <stdio.h>
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#include <string>
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#include <vector>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "media/stagefright/foundation/ABase.h"
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#include "media/stagefright/foundation/AString.h"
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#include "media/stagefright/MediaErrors.h"
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#include "OEMCryptoCENC.h"
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#include "wv_cdm_constants.h"
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#include "wv_cdm_types.h"
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#include "wv_content_decryption_module.h"
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#include "WVCryptoPlugin.h"
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using namespace android;
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using namespace std;
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using namespace testing;
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using namespace wvcdm;
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using namespace wvdrm;
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class MockCDM : public WvContentDecryptionModule {
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public:
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MOCK_METHOD1(IsOpenSession, bool(const CdmSessionId&));
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MOCK_METHOD3(Decrypt, CdmResponseType(const CdmSessionId&, bool,
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const CdmDecryptionParameters&));
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MOCK_METHOD2(QuerySessionStatus, CdmResponseType(const CdmSessionId&,
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CdmQueryMap*));
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};
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class WVCryptoPluginTest : public Test {
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protected:
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static const uint32_t kSessionIdSize = 16;
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uint8_t sessionId[kSessionIdSize];
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virtual void SetUp() {
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FILE* fp = fopen("/dev/urandom", "r");
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fread(sessionId, sizeof(uint8_t), kSessionIdSize, fp);
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fclose(fp);
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// Set default CdmResponseType value for gMock
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DefaultValue<CdmResponseType>::Set(wvcdm::NO_ERROR);
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}
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};
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TEST_F(WVCryptoPluginTest, CorrectlyReportsSecureBuffers) {
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StrictMock<MockCDM> cdm;
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CdmQueryMap l1Map;
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l1Map[QUERY_KEY_SECURITY_LEVEL] = QUERY_VALUE_SECURITY_LEVEL_L1;
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CdmQueryMap l3Map;
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l3Map[QUERY_KEY_SECURITY_LEVEL] = QUERY_VALUE_SECURITY_LEVEL_L3;
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// Provide the expected behavior for IsOpenSession
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EXPECT_CALL(cdm, IsOpenSession(_))
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.WillRepeatedly(Return(true));
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// Specify the expected calls to QuerySessionStatus
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EXPECT_CALL(cdm, QuerySessionStatus(_, _))
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.WillOnce(DoAll(SetArgPointee<1>(l1Map),
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Return(wvcdm::NO_ERROR)))
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.WillOnce(DoAll(SetArgPointee<1>(l3Map),
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Return(wvcdm::NO_ERROR)));
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WVCryptoPlugin plugin(sessionId, kSessionIdSize, &cdm);
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EXPECT_TRUE(plugin.requiresSecureDecoderComponent("video/mp4")) <<
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"WVCryptoPlugin incorrectly allows an insecure video decoder on L1";
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EXPECT_FALSE(plugin.requiresSecureDecoderComponent("video/mp4")) <<
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"WVCryptoPlugin incorrectly expects a secure video decoder on L3";
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EXPECT_FALSE(plugin.requiresSecureDecoderComponent("audio/aac")) <<
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"WVCryptoPlugin incorrectly expects a secure audio decoder";
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}
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// Factory for matchers that perform deep matching of values against a
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// CdmDecryptionParameters struct. For use in the test AttemptsToDecrypt.
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class CDPMatcherFactory {
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public:
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// Some values do not change over the course of the test. To avoid having
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// to re-specify them at every call site, we pass them into the factory
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// constructor.
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CDPMatcherFactory(bool isSecure, uint8_t* keyId, void* out, size_t outLen)
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: mIsSecure(isSecure), mKeyId(keyId), mOut(out), mOutLen(outLen) {}
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Matcher<const CdmDecryptionParameters&> operator()(bool isEncrypted,
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uint8_t* in,
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size_t inLen,
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uint8_t* iv,
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size_t blockOffset,
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size_t outOffset,
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uint8_t flags) const {
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return Truly(CDPMatcher(mIsSecure, mKeyId, mOut, mOutLen, isEncrypted,
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in, inLen, iv, blockOffset, outOffset, flags));
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}
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private:
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// Predicate that validates that the fields of a passed-in
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// CdmDecryptionParameters match the values it was given at construction
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// time.
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class CDPMatcher {
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public:
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CDPMatcher(bool isSecure, uint8_t* keyId, void* out, size_t outLen,
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bool isEncrypted, uint8_t* in, size_t inLen, uint8_t* iv,
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size_t blockOffset, size_t outOffset, uint8_t flags)
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: mIsSecure(isSecure), mKeyId(keyId), mOut(out), mOutLen(outLen),
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mIsEncrypted(isEncrypted), mIn(in), mInLen(inLen), mIv(iv),
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mBlockOffset(blockOffset), mOutOffset(outOffset), mFlags(flags) {}
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bool operator()(const CdmDecryptionParameters& params) const {
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return params.is_secure == mIsSecure &&
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Value(*params.key_id, ElementsAreArray(mKeyId, KEY_ID_SIZE)) &&
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params.decrypt_buffer == mOut &&
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params.decrypt_buffer_length == mOutLen &&
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params.is_encrypted == mIsEncrypted &&
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params.encrypt_buffer == mIn &&
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params.encrypt_length == mInLen &&
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Value(*params.iv, ElementsAreArray(mIv, KEY_IV_SIZE)) &&
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params.block_offset == mBlockOffset &&
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params.decrypt_buffer_offset == mOutOffset &&
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params.subsample_flags == mFlags;
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}
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private:
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bool mIsSecure;
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uint8_t* mKeyId;
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void* mOut;
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size_t mOutLen;
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bool mIsEncrypted;
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uint8_t* mIn;
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size_t mInLen;
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uint8_t* mIv;
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size_t mBlockOffset;
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size_t mOutOffset;
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uint8_t mFlags;
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};
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bool mIsSecure;
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uint8_t* mKeyId;
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void* mOut;
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size_t mOutLen;
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};
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TEST_F(WVCryptoPluginTest, AttemptsToDecrypt) {
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StrictMock<MockCDM> cdm;
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uint8_t keyId[KEY_ID_SIZE];
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uint8_t baseIv[KEY_IV_SIZE];
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static const size_t kDataSize = 185;
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uint8_t in[kDataSize];
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uint8_t out[kDataSize];
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FILE* fp = fopen("/dev/urandom", "r");
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fread(keyId, sizeof(uint8_t), KEY_ID_SIZE, fp);
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fread(baseIv, sizeof(uint8_t), KEY_IV_SIZE, fp);
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fread(in, sizeof(uint8_t), kDataSize, fp);
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fclose(fp);
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static const size_t kSubSampleCount = 6;
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CryptoPlugin::SubSample subSamples[kSubSampleCount];
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memset(subSamples, 0, sizeof(subSamples));
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subSamples[0].mNumBytesOfEncryptedData = 16;
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subSamples[1].mNumBytesOfClearData = 16;
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subSamples[1].mNumBytesOfEncryptedData = 16;
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subSamples[2].mNumBytesOfEncryptedData = 8;
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subSamples[3].mNumBytesOfClearData = 29;
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subSamples[3].mNumBytesOfEncryptedData = 24;
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subSamples[4].mNumBytesOfEncryptedData = 60;
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subSamples[5].mNumBytesOfEncryptedData = 16;
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uint8_t iv[5][KEY_IV_SIZE];
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memcpy(iv[0], baseIv, sizeof(baseIv));
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iv[0][15] = 0;
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memcpy(iv[1], baseIv, sizeof(baseIv));
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iv[1][15] = 1;
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memcpy(iv[2], baseIv, sizeof(baseIv));
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iv[2][15] = 2;
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memcpy(iv[3], baseIv, sizeof(baseIv));
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iv[3][15] = 4;
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memcpy(iv[4], baseIv, sizeof(baseIv));
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iv[4][15] = 7;
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CDPMatcherFactory ParamsAre = CDPMatcherFactory(false, keyId, out, kDataSize);
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// Provide the expected behavior for IsOpenSession
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EXPECT_CALL(cdm, IsOpenSession(_))
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.WillRepeatedly(Return(true));
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// Specify the expected calls to Decrypt
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{
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InSequence calls;
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// SubSample 0
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in, 16, iv[0], 0, 0,
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OEMCrypto_FirstSubsample)))
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.Times(1);
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// SubSample 1
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(false, in + 16, 16, iv[1], 0, 16, 0)))
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.Times(1);
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in + 32, 16, iv[1], 0, 32, 0)))
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.Times(1);
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// SubSample 2
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in + 48, 8, iv[2], 0, 48, 0)))
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.Times(1);
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// SubSample 3
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(false, in + 56, 29, iv[2], 0, 56, 0)))
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.Times(1);
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in + 85, 24, iv[2], 8, 85, 0)))
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.Times(1);
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// SubSample 4
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in + 109, 60, iv[3], 0, 109, 0)))
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.Times(1);
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// SubSample 5
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EXPECT_CALL(cdm, Decrypt(ElementsAreArray(sessionId, kSessionIdSize),
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true,
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ParamsAre(true, in + 169, 16, iv[4], 12, 169,
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OEMCrypto_LastSubsample)))
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.Times(1);
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}
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WVCryptoPlugin plugin(sessionId, kSessionIdSize, &cdm);
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AString errorDetailMessage;
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ssize_t res = plugin.decrypt(false, keyId, iv[0], CryptoPlugin::kMode_AES_CTR,
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in, subSamples, kSubSampleCount, out,
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&errorDetailMessage);
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EXPECT_EQ(static_cast<ssize_t>(kDataSize), res) <<
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"WVCryptoPlugin decrypted the wrong number of bytes";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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}
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TEST_F(WVCryptoPluginTest, CommunicatesSecureBufferRequest) {
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StrictMock<MockCDM> cdm;
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uint8_t keyId[KEY_ID_SIZE];
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uint8_t iv[KEY_IV_SIZE];
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static const size_t kDataSize = 32;
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uint8_t in[kDataSize];
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uint8_t out[kDataSize];
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FILE* fp = fopen("/dev/urandom", "r");
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fread(keyId, sizeof(uint8_t), KEY_ID_SIZE, fp);
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fread(iv, sizeof(uint8_t), KEY_IV_SIZE, fp);
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fread(in, sizeof(uint8_t), kDataSize, fp);
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fclose(fp);
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static const uint32_t kSubSampleCount = 1;
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CryptoPlugin::SubSample subSamples[kSubSampleCount];
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memset(subSamples, 0, sizeof(subSamples));
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subSamples[0].mNumBytesOfClearData = 16;
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subSamples[0].mNumBytesOfEncryptedData = 16;
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// Provide the expected behavior for IsOpenSession
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EXPECT_CALL(cdm, IsOpenSession(_))
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.WillRepeatedly(Return(true));
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// Specify the expected calls to Decrypt
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{
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InSequence calls;
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typedef CdmDecryptionParameters CDP;
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EXPECT_CALL(cdm, Decrypt(_, _, Field(&CDP::is_secure, false)))
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.Times(2);
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EXPECT_CALL(cdm, Decrypt(_, _, Field(&CDP::is_secure, true)))
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.Times(2);
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}
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WVCryptoPlugin plugin(sessionId, kSessionIdSize, &cdm);
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AString errorDetailMessage;
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ssize_t res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR,
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in, subSamples, kSubSampleCount, out,
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&errorDetailMessage);
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ASSERT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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res = plugin.decrypt(true, keyId, iv, CryptoPlugin::kMode_AES_CTR, in,
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subSamples, kSubSampleCount, out, &errorDetailMessage);
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ASSERT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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}
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TEST_F(WVCryptoPluginTest, SetsFlagsForMinimumSubsampleRuns) {
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MockCDM cdm;
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uint8_t keyId[KEY_ID_SIZE];
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uint8_t iv[KEY_IV_SIZE];
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static const size_t kDataSize = 16;
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uint8_t in[kDataSize];
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uint8_t out[kDataSize];
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FILE* fp = fopen("/dev/urandom", "r");
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fread(keyId, sizeof(uint8_t), KEY_ID_SIZE, fp);
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fread(iv, sizeof(uint8_t), KEY_IV_SIZE, fp);
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fread(in, sizeof(uint8_t), kDataSize, fp);
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fclose(fp);
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static const uint32_t kSubSampleCount = 1;
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CryptoPlugin::SubSample clearSubSamples[kSubSampleCount];
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memset(clearSubSamples, 0, sizeof(clearSubSamples));
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clearSubSamples[0].mNumBytesOfClearData = 16;
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CryptoPlugin::SubSample encryptedSubSamples[kSubSampleCount];
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memset(encryptedSubSamples, 0, sizeof(encryptedSubSamples));
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encryptedSubSamples[0].mNumBytesOfEncryptedData = 16;
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CryptoPlugin::SubSample mixedSubSamples[kSubSampleCount];
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memset(mixedSubSamples, 0, sizeof(mixedSubSamples));
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mixedSubSamples[0].mNumBytesOfClearData = 8;
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mixedSubSamples[0].mNumBytesOfEncryptedData = 8;
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// Provide the expected behavior for IsOpenSession
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EXPECT_CALL(cdm, IsOpenSession(_))
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.WillRepeatedly(Return(true));
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// Specify the expected calls to Decrypt
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{
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InSequence calls;
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typedef CdmDecryptionParameters CDP;
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EXPECT_CALL(cdm, Decrypt(_, _, Field(&CDP::subsample_flags,
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OEMCrypto_FirstSubsample |
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OEMCrypto_LastSubsample)))
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.Times(2);
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EXPECT_CALL(cdm, Decrypt(_, _, Field(&CDP::subsample_flags,
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OEMCrypto_FirstSubsample)))
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.Times(1);
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EXPECT_CALL(cdm, Decrypt(_, _, Field(&CDP::subsample_flags,
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OEMCrypto_LastSubsample)))
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.Times(1);
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}
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WVCryptoPlugin plugin(sessionId, kSessionIdSize, &cdm);
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AString errorDetailMessage;
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ssize_t res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR,
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in, clearSubSamples, kSubSampleCount, out,
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&errorDetailMessage);
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ASSERT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR, in,
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encryptedSubSamples, kSubSampleCount, out,
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&errorDetailMessage);
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ASSERT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR, in,
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mixedSubSamples, kSubSampleCount, out,
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&errorDetailMessage);
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ASSERT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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EXPECT_EQ(0u, errorDetailMessage.size()) <<
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"WVCryptoPlugin reported a detailed error message.";
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}
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TEST_F(WVCryptoPluginTest, AllowsSessionIdChanges) {
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StrictMock<MockCDM> cdm;
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uint8_t keyId[KEY_ID_SIZE];
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uint8_t iv[KEY_IV_SIZE];
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uint8_t sessionId2[kSessionIdSize];
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static const size_t kDataSize = 32;
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uint8_t in[kDataSize];
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uint8_t out[kDataSize];
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FILE* fp = fopen("/dev/urandom", "r");
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fread(keyId, sizeof(uint8_t), KEY_ID_SIZE, fp);
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fread(iv, sizeof(uint8_t), KEY_IV_SIZE, fp);
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fread(sessionId2, sizeof(uint8_t), kSessionIdSize, fp);
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fread(in, sizeof(uint8_t), kDataSize, fp);
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fclose(fp);
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static const uint32_t kSubSampleCount = 1;
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CryptoPlugin::SubSample subSamples[kSubSampleCount];
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memset(subSamples, 0, sizeof(subSamples));
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subSamples[0].mNumBytesOfClearData = 16;
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subSamples[0].mNumBytesOfEncryptedData = 16;
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Vector<uint8_t> sessionIdVector;
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sessionIdVector.appendArray(sessionId, kSessionIdSize);
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Vector<uint8_t> sessionId2Vector;
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sessionId2Vector.appendArray(sessionId2, kSessionIdSize);
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// Provide the expected behavior for IsOpenSession
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EXPECT_CALL(cdm, IsOpenSession(_))
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.WillRepeatedly(Return(true));
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// Specify the expected calls to Decrypt
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{
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InSequence calls;
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EXPECT_CALL(cdm,
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Decrypt(ElementsAreArray(sessionId, kSessionIdSize), _, _))
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.Times(2);
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EXPECT_CALL(cdm,
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Decrypt(ElementsAreArray(sessionId2, kSessionIdSize), _, _))
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.Times(2);
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}
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uint8_t blank[1]; // Some compilers will not accept 0.
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WVCryptoPlugin plugin(blank, 0, &cdm);
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AString errorDetailMessage;
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ssize_t res;
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res = plugin.setMediaDrmSession(sessionIdVector);
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EXPECT_EQ(android::NO_ERROR, res);
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res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR, in,
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subSamples, kSubSampleCount, out, &errorDetailMessage);
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EXPECT_GE(res, 0) <<
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"WVCryptoPlugin returned an error";
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|
EXPECT_EQ(0u, errorDetailMessage.size()) <<
|
|
"WVCryptoPlugin reported a detailed error message.";
|
|
|
|
res = plugin.setMediaDrmSession(sessionId2Vector);
|
|
EXPECT_EQ(android::NO_ERROR, res);
|
|
res = plugin.decrypt(false, keyId, iv, CryptoPlugin::kMode_AES_CTR, in,
|
|
subSamples, kSubSampleCount, out, &errorDetailMessage);
|
|
EXPECT_GE(res, 0) <<
|
|
"WVCryptoPlugin returned an error";
|
|
EXPECT_EQ(0u, errorDetailMessage.size()) <<
|
|
"WVCryptoPlugin reported a detailed error message.";
|
|
}
|
|
|
|
TEST_F(WVCryptoPluginTest, DisallowsUnopenedSessionIdChanges) {
|
|
StrictMock<MockCDM> cdm;
|
|
|
|
uint8_t blank[1]; // Some compilers will not accept 0.
|
|
Vector<uint8_t> sessionIdVector;
|
|
sessionIdVector.appendArray(sessionId, kSessionIdSize);
|
|
|
|
// Specify the expected calls to IsOpenSession
|
|
{
|
|
InSequence calls;
|
|
|
|
EXPECT_CALL(cdm, IsOpenSession(ElementsAreArray(blank, 0)))
|
|
.WillOnce(Return(false));
|
|
|
|
EXPECT_CALL(cdm, IsOpenSession(ElementsAreArray(sessionId, kSessionIdSize)))
|
|
.WillOnce(Return(false))
|
|
.WillOnce(Return(true));
|
|
}
|
|
|
|
WVCryptoPlugin plugin(blank, 0, &cdm);
|
|
|
|
ssize_t res;
|
|
res = plugin.setMediaDrmSession(sessionIdVector);
|
|
EXPECT_EQ(android::ERROR_DRM_SESSION_NOT_OPENED, res);
|
|
res = plugin.setMediaDrmSession(sessionIdVector);
|
|
EXPECT_EQ(android::NO_ERROR, res);
|
|
}
|