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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/cdm/cenc_utils.h"
#include "base/logging.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
const uint8_t kKey1Data[] = {
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03,
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03
};
const uint8_t kKey2Data[] = {
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04,
};
const uint8_t kKey3Data[] = {
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x05,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x05,
};
const uint8_t kKey4Data[] = {
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x06,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x06,
};
class CencUtilsTest : public testing::Test {
public:
CencUtilsTest()
: key1_(kKey1Data, kKey1Data + arraysize(kKey1Data)),
key2_(kKey2Data, kKey2Data + arraysize(kKey2Data)),
key3_(kKey3Data, kKey3Data + arraysize(kKey3Data)),
key4_(kKey4Data, kKey4Data + arraysize(kKey4Data)) {}
protected:
// Initialize the start of the 'pssh' box (up to key_count)
void InitializePSSHBox(std::vector<uint8_t>* box,
uint8_t size,
uint8_t version) {
DCHECK(box->size() == 0);
box->reserve(size);
// Add size.
box->push_back(0);
box->push_back(0);
box->push_back(0);
box->push_back(size);
// Add 'pssh'.
box->push_back('p');
box->push_back('s');
box->push_back('s');
box->push_back('h');
// Add version.
box->push_back(version);
// Add flags.
box->push_back(0);
box->push_back(0);
box->push_back(0);
// Add Clear Key SystemID.
box->push_back(0x10);
box->push_back(0x77);
box->push_back(0xEF);
box->push_back(0xEC);
box->push_back(0xC0);
box->push_back(0xB2);
box->push_back(0x4D);
box->push_back(0x02);
box->push_back(0xAC);
box->push_back(0xE3);
box->push_back(0x3C);
box->push_back(0x1E);
box->push_back(0x52);
box->push_back(0xE2);
box->push_back(0xFB);
box->push_back(0x4B);
}
std::vector<uint8_t> MakePSSHBox(uint8_t version) {
std::vector<uint8_t> box;
uint8_t size = (version == 0) ? 32 : 36;
InitializePSSHBox(&box, size, version);
if (version > 0) {
// Add key_count (= 0).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(0);
}
// Add data_size (= 0).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(0);
return box;
}
std::vector<uint8_t> MakePSSHBox(uint8_t version,
const std::vector<uint8_t>& key1) {
DCHECK(version > 0);
DCHECK(key1.size() == 16);
std::vector<uint8_t> box;
uint8_t size = 52;
InitializePSSHBox(&box, size, version);
// Add key_count (= 1).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(1);
// Add key1.
for (int i = 0; i < 16; ++i)
box.push_back(key1[i]);
// Add data_size (= 0).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(0);
return box;
}
std::vector<uint8_t> MakePSSHBox(uint8_t version,
const std::vector<uint8_t>& key1,
const std::vector<uint8_t>& key2) {
DCHECK(version > 0);
DCHECK(key1.size() == 16);
DCHECK(key2.size() == 16);
std::vector<uint8_t> box;
uint8_t size = 68;
InitializePSSHBox(&box, size, version);
// Add key_count (= 2).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(2);
// Add key1.
for (int i = 0; i < 16; ++i)
box.push_back(key1[i]);
// Add key2.
for (int i = 0; i < 16; ++i)
box.push_back(key2[i]);
// Add data_size (= 0).
box.push_back(0);
box.push_back(0);
box.push_back(0);
box.push_back(0);
return box;
}
const std::vector<uint8_t>& Key1() { return key1_; }
const std::vector<uint8_t>& Key2() { return key2_; }
const std::vector<uint8_t>& Key3() { return key3_; }
const std::vector<uint8_t>& Key4() { return key4_; }
private:
std::vector<uint8_t> key1_;
std::vector<uint8_t> key2_;
std::vector<uint8_t> key3_;
std::vector<uint8_t> key4_;
};
TEST_F(CencUtilsTest, EmptyPSSH) {
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(std::vector<uint8_t>()));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(std::vector<uint8_t>(), &key_ids));
EXPECT_EQ(0u, key_ids.size());
}
TEST_F(CencUtilsTest, PSSHVersion0) {
std::vector<uint8_t> box = MakePSSHBox(0);
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(0u, key_ids.size());
}
TEST_F(CencUtilsTest, PSSHVersion1WithNoKeys) {
std::vector<uint8_t> box = MakePSSHBox(1);
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(0u, key_ids.size());
}
TEST_F(CencUtilsTest, PSSHVersion1WithOneKey) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1());
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(1u, key_ids.size());
EXPECT_EQ(key_ids[0], Key1());
}
TEST_F(CencUtilsTest, PSSHVersion1WithTwoKeys) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1(), Key2());
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(2u, key_ids.size());
EXPECT_EQ(key_ids[0], Key1());
EXPECT_EQ(key_ids[1], Key2());
}
TEST_F(CencUtilsTest, PSSHVersion0Plus1) {
std::vector<uint8_t> box0 = MakePSSHBox(0);
std::vector<uint8_t> box1 = MakePSSHBox(1, Key1());
// Concatentate box1 into box0.
for (const auto& value : box1)
box0.push_back(value);
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box0));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box0, &key_ids));
EXPECT_EQ(1u, key_ids.size());
EXPECT_EQ(key_ids[0], Key1());
}
TEST_F(CencUtilsTest, PSSHVersion1Plus0) {
std::vector<uint8_t> box0 = MakePSSHBox(0);
std::vector<uint8_t> box1 = MakePSSHBox(1, Key1());
// Concatentate box0 into box1.
for (const auto& value : box0)
box1.push_back(value);
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box1));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box1, &key_ids));
EXPECT_EQ(1u, key_ids.size());
EXPECT_EQ(key_ids[0], Key1());
}
TEST_F(CencUtilsTest, MultiplePSSHVersion1) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1(), Key2());
std::vector<uint8_t> box1 = MakePSSHBox(1, Key3());
std::vector<uint8_t> box2 = MakePSSHBox(1, Key4());
// Concatentate box1 into box.
for (const auto& value : box1)
box.push_back(value);
// Concatentate box2 into box.
for (const auto& value : box2)
box.push_back(value);
KeyIdList key_ids;
EXPECT_TRUE(ValidatePsshInput(box));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(4u, key_ids.size());
EXPECT_EQ(key_ids[0], Key1());
EXPECT_EQ(key_ids[1], Key2());
EXPECT_EQ(key_ids[2], Key3());
EXPECT_EQ(key_ids[3], Key4());
}
TEST_F(CencUtilsTest, InvalidPSSH) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1(), Key2());
KeyIdList key_ids;
for (uint32 i = 1; i < box.size(); ++i) {
// Modify size of data passed to be less than real size.
std::vector<uint8_t> truncated(&box[0], &box[0] + i);
EXPECT_FALSE(ValidatePsshInput(truncated));
EXPECT_FALSE(GetKeyIdsForCommonSystemId(truncated, &key_ids));
// Modify starting point.
std::vector<uint8_t> changed_offset(&box[i], &box[i] + box.size() - i);
EXPECT_FALSE(ValidatePsshInput(changed_offset));
EXPECT_FALSE(GetKeyIdsForCommonSystemId(changed_offset, &key_ids));
}
}
TEST_F(CencUtilsTest, InvalidSystemID) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1(), Key2());
// Modify the System ID.
++box[20];
KeyIdList key_ids;
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(0u, key_ids.size());
}
TEST_F(CencUtilsTest, InvalidFlags) {
std::vector<uint8_t> box = MakePSSHBox(1, Key1(), Key2());
// Modify flags.
box[10] = 3;
KeyIdList key_ids;
// TODO(jrummell): This should fail as the 'pssh' box is skipped.
EXPECT_TRUE(GetKeyIdsForCommonSystemId(box, &key_ids));
EXPECT_EQ(0u, key_ids.size());
}
TEST_F(CencUtilsTest, LongSize) {
const uint8_t data[] = {
0x00, 0x00, 0x00, 0x01, // size = 1
0x70, 0x73, 0x73, 0x68, // 'pssh'
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4c, // longsize
0x01, // version
0x00, 0x00, 0x00, // flags
0x10, 0x77, 0xEF, 0xEC, 0xC0, 0xB2, 0x4D, 0x02, // SystemID
0xAC, 0xE3, 0x3C, 0x1E, 0x52, 0xE2, 0xFB, 0x4B,
0x00, 0x00, 0x00, 0x02, // key count
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03, // key1
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04, // key2
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04,
0x00, 0x00, 0x00, 0x00 // datasize
};
KeyIdList key_ids;
EXPECT_TRUE(
ValidatePsshInput(std::vector<uint8_t>(data, data + arraysize(data))));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(
std::vector<uint8_t>(data, data + arraysize(data)), &key_ids));
EXPECT_EQ(2u, key_ids.size());
}
TEST_F(CencUtilsTest, NoSize) {
const uint8_t data[] = {
0x00, 0x00, 0x00, 0x00, // size = 0
0x70, 0x73, 0x73, 0x68, // 'pssh'
0x01, // version
0x00, 0x00, 0x00, // flags
0x10, 0x77, 0xEF, 0xEC, 0xC0, 0xB2, 0x4D, 0x02, // SystemID
0xAC, 0xE3, 0x3C, 0x1E, 0x52, 0xE2, 0xFB, 0x4B,
0x00, 0x00, 0x00, 0x02, // key count
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03, // key1
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04, // key2
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04,
0x00, 0x00, 0x00, 0x00 // datasize
};
KeyIdList key_ids;
EXPECT_TRUE(
ValidatePsshInput(std::vector<uint8_t>(data, data + arraysize(data))));
EXPECT_TRUE(GetKeyIdsForCommonSystemId(
std::vector<uint8_t>(data, data + arraysize(data)), &key_ids));
EXPECT_EQ(2u, key_ids.size());
}
TEST_F(CencUtilsTest, HugeSize) {
const uint8_t data[] = {
0x00, 0x00, 0x00, 0x01, // size = 1
0x70, 0x73, 0x73, 0x68, // 'pssh'
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // longsize = big
0x01, // version
0x00, 0x00, 0x00, // flags
0x10, 0x77, 0xEF, 0xEC, 0xC0, 0xB2, 0x4D, 0x02, // SystemID
0xAC, 0xE3, 0x3C, 0x1E, 0x52, 0xE2, 0xFB, 0x4B,
0x00, 0x00, 0x00, 0x02, // key count
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03, // key1
0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03,
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04, // key2
0x7E, 0x57, 0x1D, 0x04, 0x7E, 0x57, 0x1D, 0x04,
0x00, 0x00, 0x00, 0x00 // datasize
};
KeyIdList key_ids;
EXPECT_FALSE(
ValidatePsshInput(std::vector<uint8_t>(data, data + arraysize(data))));
EXPECT_FALSE(GetKeyIdsForCommonSystemId(
std::vector<uint8_t>(data, data + arraysize(data)), &key_ids));
}
} // namespace media
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