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// Copyright 2018 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/base/decrypt_config.h"
#include <sstream>
#include "media/base/encryption_pattern.h"
#include "media/base/subsample_entry.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
namespace {
const char kDefaultKeyId[] = "key_id";
const char kDefaultIV[] = "1234567890123456";
const char kAlternateKeyId[] = "alternate";
const char kAlternateIV[] = "abcdefghijklmnop";
} // namespace
TEST(DecryptConfigTest, CencConstruction) {
auto config = DecryptConfig::CreateCencConfig(kDefaultKeyId, kDefaultIV, {});
EXPECT_EQ(config->key_id(), kDefaultKeyId);
EXPECT_EQ(config->iv(), kDefaultIV);
EXPECT_EQ(config->subsamples().size(), 0u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCenc);
// Now with single subsample entry.
config =
DecryptConfig::CreateCencConfig(kAlternateKeyId, kDefaultIV, {{1, 2}});
EXPECT_EQ(config->key_id(), kAlternateKeyId);
EXPECT_EQ(config->iv(), kDefaultIV);
EXPECT_EQ(config->subsamples().size(), 1u);
EXPECT_EQ(config->subsamples()[0].clear_bytes, 1u);
EXPECT_EQ(config->subsamples()[0].cypher_bytes, 2u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCenc);
// Now with multiple subsample entries.
config = DecryptConfig::CreateCencConfig(kDefaultKeyId, kAlternateIV,
{{1, 2}, {3, 4}, {5, 6}, {7, 8}});
EXPECT_EQ(config->key_id(), kDefaultKeyId);
EXPECT_EQ(config->iv(), kAlternateIV);
EXPECT_EQ(config->subsamples().size(), 4u);
EXPECT_EQ(config->subsamples()[1].clear_bytes, 3u);
EXPECT_EQ(config->subsamples()[3].cypher_bytes, 8u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCenc);
}
TEST(DecryptConfigTest, CbcsConstruction) {
auto config = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
EncryptionPattern(1, 2));
EXPECT_EQ(config->key_id(), kDefaultKeyId);
EXPECT_EQ(config->iv(), kDefaultIV);
EXPECT_EQ(config->subsamples().size(), 0u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCbcs);
EXPECT_TRUE(config->HasPattern());
EXPECT_EQ(config->encryption_pattern()->crypt_byte_block(), 1u);
EXPECT_EQ(config->encryption_pattern()->skip_byte_block(), 2u);
// Now with multiple subsample entries.
config = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kAlternateIV,
{{1, 2}, {3, 4}, {5, 6}, {7, 8}},
EncryptionPattern(1, 0));
EXPECT_EQ(config->key_id(), kDefaultKeyId);
EXPECT_EQ(config->iv(), kAlternateIV);
EXPECT_EQ(config->subsamples().size(), 4u);
EXPECT_EQ(config->subsamples()[0].clear_bytes, 1u);
EXPECT_EQ(config->subsamples()[0].cypher_bytes, 2u);
EXPECT_EQ(config->subsamples()[3].clear_bytes, 7u);
EXPECT_EQ(config->subsamples()[3].cypher_bytes, 8u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCbcs);
EXPECT_TRUE(config->HasPattern());
EXPECT_EQ(config->encryption_pattern()->crypt_byte_block(), 1u);
EXPECT_EQ(config->encryption_pattern()->skip_byte_block(), 0u);
// Now without pattern.
config = DecryptConfig::CreateCbcsConfig(kAlternateKeyId, kDefaultIV,
{{1, 2}}, absl::nullopt);
EXPECT_EQ(config->key_id(), kAlternateKeyId);
EXPECT_EQ(config->iv(), kDefaultIV);
EXPECT_EQ(config->subsamples().size(), 1u);
EXPECT_EQ(config->subsamples()[0].clear_bytes, 1u);
EXPECT_EQ(config->subsamples()[0].cypher_bytes, 2u);
EXPECT_EQ(config->encryption_scheme(), EncryptionScheme::kCbcs);
EXPECT_FALSE(config->HasPattern());
}
TEST(DecryptConfigTest, Matches) {
auto config1 = DecryptConfig::CreateCencConfig(kDefaultKeyId, kDefaultIV, {});
EXPECT_TRUE(config1->Matches(*config1));
auto config2 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
EncryptionPattern(1, 2));
EXPECT_TRUE(config2->Matches(*config2));
EXPECT_FALSE(config1->Matches(*config2));
EXPECT_FALSE(config2->Matches(*config1));
}
TEST(DecryptConfigTest, CencMatches) {
auto config1 = DecryptConfig::CreateCencConfig(kDefaultKeyId, kDefaultIV, {});
EXPECT_TRUE(config1->Matches(*config1));
// Different key_id.
auto config2 =
DecryptConfig::CreateCencConfig(kAlternateKeyId, kDefaultIV, {});
EXPECT_FALSE(config1->Matches(*config2));
EXPECT_FALSE(config2->Matches(*config1));
// Different IV.
auto config3 =
DecryptConfig::CreateCencConfig(kDefaultKeyId, kAlternateIV, {});
EXPECT_FALSE(config1->Matches(*config3));
EXPECT_FALSE(config2->Matches(*config3));
EXPECT_FALSE(config3->Matches(*config1));
EXPECT_FALSE(config3->Matches(*config2));
// Different subsamples.
auto config4 = DecryptConfig::CreateCencConfig(
kDefaultKeyId, kDefaultIV, {{1, 2}, {3, 4}, {5, 6}, {7, 8}});
EXPECT_FALSE(config1->Matches(*config4));
EXPECT_FALSE(config2->Matches(*config4));
EXPECT_FALSE(config3->Matches(*config4));
EXPECT_FALSE(config4->Matches(*config1));
EXPECT_FALSE(config4->Matches(*config2));
EXPECT_FALSE(config4->Matches(*config3));
}
TEST(DecryptConfigTest, CbcsMatches) {
auto config1 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
EncryptionPattern(1, 2));
EXPECT_TRUE(config1->Matches(*config1));
// Different key_id.
auto config2 = DecryptConfig::CreateCbcsConfig(kAlternateKeyId, kDefaultIV,
{}, EncryptionPattern(1, 2));
EXPECT_FALSE(config1->Matches(*config2));
EXPECT_FALSE(config2->Matches(*config1));
// Different IV.
auto config3 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kAlternateIV,
{}, EncryptionPattern(1, 2));
EXPECT_FALSE(config1->Matches(*config3));
EXPECT_FALSE(config2->Matches(*config3));
EXPECT_FALSE(config3->Matches(*config1));
EXPECT_FALSE(config3->Matches(*config2));
// Different subsamples.
auto config4 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV,
{{1, 2}, {3, 4}, {5, 6}},
EncryptionPattern(1, 2));
EXPECT_FALSE(config1->Matches(*config4));
EXPECT_FALSE(config2->Matches(*config4));
EXPECT_FALSE(config3->Matches(*config4));
EXPECT_FALSE(config4->Matches(*config1));
EXPECT_FALSE(config4->Matches(*config2));
EXPECT_FALSE(config4->Matches(*config3));
// Different pattern.
auto config5 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
EncryptionPattern(5, 6));
EXPECT_FALSE(config1->Matches(*config5));
EXPECT_FALSE(config2->Matches(*config5));
EXPECT_FALSE(config3->Matches(*config5));
EXPECT_FALSE(config4->Matches(*config5));
EXPECT_FALSE(config5->Matches(*config1));
EXPECT_FALSE(config5->Matches(*config2));
EXPECT_FALSE(config5->Matches(*config3));
EXPECT_FALSE(config5->Matches(*config4));
// Without pattern.
auto config6 = DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
absl::nullopt);
EXPECT_FALSE(config1->Matches(*config6));
EXPECT_FALSE(config5->Matches(*config6));
EXPECT_FALSE(config6->Matches(*config1));
EXPECT_FALSE(config6->Matches(*config5));
}
TEST(DecryptConfigTest, Output) {
std::ostringstream stream;
// Simple 'cenc' config.
stream << *DecryptConfig::CreateCencConfig(kDefaultKeyId, kDefaultIV, {});
// Try with subsamples.
stream << *DecryptConfig::CreateCencConfig(kAlternateKeyId, kAlternateIV,
{{1, 2}, {3, 4}, {5, 6}});
// Simple 'cbcs' config.
stream << *DecryptConfig::CreateCbcsConfig(kDefaultKeyId, kDefaultIV, {},
absl::nullopt);
// 'cbcs' config with subsamples and pattern.
stream << *DecryptConfig::CreateCbcsConfig(kAlternateKeyId, kAlternateIV,
{{1, 2}, {3, 4}, {5, 6}, {7, 8}},
EncryptionPattern(1, 2));
}
} // namespace media
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