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(1) Return a boolean instead of util::Status for methods in wv_cas_ecm.h

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(2) Update wv_cas_ecm_example to NOT depend on ABSL

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=218884631
This commit is contained in:
Fang Yu
2018-10-26 11:20:39 -07:00
parent d2f5df0c9f
commit 70f62ed75e
5 changed files with 142 additions and 164 deletions
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2
example/BUILD
View File

@@ -48,8 +48,6 @@ cc_binary(
srcs = ["wv_cas_ecm_example.cc"],
deps = [
"//base",
"@abseil_repo//absl/strings",
"//util:status",
"//media_cas_packager_sdk/public:wv_cas_ecm",
],
)

46
example/wv_cas_ecm_example.cc
View File

@@ -8,47 +8,43 @@
// Example of how to use the wv_cas_ecm library.
#include <iostream>
#include <string>
#include "gflags/gflags.h"
#include "glog/logging.h"
#include "absl/strings/escaping.h"
#include "absl/strings/str_cat.h"
#include "util/status.h"
#include "media_cas_packager_sdk/public/wv_cas_ecm.h"
const int kContentIvSize = 16;
const bool kKeyRotationEnabled = true;
const int kCryptoMode = 1; // CTR
const char kEvenKey[] = "even_content_key"; // 16 bytes
const char kEvenContentIv8Bytes[] = "evencont"; // 8 bytes
const char kEvenContentIv16Bytes[] = "evencontevencont"; // 16 bytes
const char kOddKey[] = "odd_content_key."; // 16 bytes
const char kOddContentIv8Bytes[] = "oddcont."; // 8 bytes
const char kOddContentIv16Bytes[] = "oddcont.oddcont."; // 16 bytes
const char kEntitlementKeyId[] = "ent_key_id......"; // 16 bytes
const char kEntitlementKey[] = "entitlement_key................."; // 32 bytes
int main(int argc, char **argv) {
gflags::ParseCommandLineFlags(&argc, &argv, true);
widevine::cas::WvCasEcm wv_cas_ecm;
auto status = wv_cas_ecm.Initialize(/* content_iv_size= */ 16,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1);
if (!status.ok()) {
LOG(FATAL) << "Failed to initialize WV CAS ECM, error: " << status;
bool status =
wv_cas_ecm.Initialize(kContentIvSize, kKeyRotationEnabled, kCryptoMode);
if (!status) {
std::cerr << "Failed to initialize WV CAS ECM, error." << std::endl;
}
std::string ecm;
status = wv_cas_ecm.GenerateEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */
absl::StrCat(kEvenContentIv8Bytes, kEvenContentIv8Bytes),
/* odd_key= */ kOddKey,
/* odd_content_iv= */
absl::StrCat(kOddContentIv8Bytes, kOddContentIv8Bytes),
/* entitlement_key_id= */ kEntitlementKeyId,
/* entitlement_key= */ kEntitlementKey, &ecm);
if (!status.ok()) {
LOG(FATAL) << "Failed to generate WV CAS ECM, error: " << status;
status = wv_cas_ecm.GenerateEcm(kEvenKey, kEvenContentIv16Bytes, kOddKey,
kOddContentIv16Bytes, kEntitlementKeyId,
kEntitlementKey, &ecm);
if (!status) {
std::cerr << "Failed to generate WV CAS ECM, error" << std::endl;
} else {
LOG(INFO) << "Generated WV CAS ECM (in hex): "
<< absl::BytesToHexString(ecm);
std::cout << "ECM size: " << ecm.size() << std::endl;
std::cout << "ECM bytes: ";
for (size_t i = 0; i < ecm.size(); i++) {
printf("'\\x%x', ", static_cast<uint16_t>(ecm.at(i)));
}
std::cout << std::endl;
}
return 0;

87
media_cas_packager_sdk/public/wv_cas_ecm.cc
View File

@@ -52,53 +52,52 @@ EcmInitParameters CreateEcmInitParameters(int content_iv_size,
} // namespace
util::Status WvCasEcm::Initialize(int content_iv_size,
bool key_rotation_enabled, int crypto_mode) {
// TODO(user): Return a status class like
// instead of boolean.
bool WvCasEcm::Initialize(int content_iv_size, bool key_rotation_enabled,
int crypto_mode) {
if (initialized_) {
return util::Status(
util::error::INTERNAL,
"Cannot initialize an instance of WvCasEcm more than once");
LOG(ERROR) << "Cannot initialize an instance of WvCasEcm more than once";
return false;
}
if (content_iv_size != 8 && content_iv_size != 16) {
return util::Status(util::error::INVALID_ARGUMENT,
"Only support content_iv_size being 8 now");
LOG(ERROR) << "Only support content_iv_size being 8 now";
return false;
}
content_iv_size_ = content_iv_size;
key_rotation_enabled_ = key_rotation_enabled;
if (crypto_mode != kCryptoModeCtr) {
return util::Status(util::error::INVALID_ARGUMENT,
"Only CTR crypto mode is supported by Widevine plugin "
"for content encryption");
LOG(ERROR) << "Only CTR crypto mode is supported by Widevine plugin for "
"content encryption";
return false;
}
crypto_mode_ = crypto_mode;
initialized_ = true;
return util::OkStatus();
return true;
}
util::Status WvCasEcm::GenerateEcm(const std::string& even_key,
const std::string& even_content_iv,
const std::string& odd_key,
bool WvCasEcm::GenerateEcm(const std::string& even_key,
const std::string& even_content_iv, const std::string& odd_key,
const std::string& odd_content_iv,
const std::string& entitlement_key_id,
const std::string& entitlement_key,
std::string* ecm) const {
const std::string& entitlement_key, std::string* ecm) const {
DCHECK(ecm);
if (!initialized_) {
return util::Status(util::error::INTERNAL,
"WvCasEcm has not been properly initialized");
LOG(ERROR) << "WvCasEcm has not been properly initialized";
return false;
}
if (!key_rotation_enabled_) {
return util::Status(util::error::INTERNAL,
"Please call GenerateSingleKeyEcm() instead when key "
"rotation is disabled");
LOG(ERROR) << "Please call GenerateSingleKeyEcm() instead when key "
"rotation is disabled";
return false;
}
if (even_content_iv.size() != content_iv_size_ ||
odd_content_iv.size() != content_iv_size_) {
return util::Status(util::error::INVALID_ARGUMENT,
"Size of content IV is incorrect");
LOG(ERROR) << "Size of content IV is incorrect";
return false;
}
// Create an instance of CasEcm in order to set the entitlement keys.
@@ -117,7 +116,8 @@ util::Status WvCasEcm::GenerateEcm(const std::string& even_key,
if (!(status = cas_ecm->Initialize(kDefaultContentId, kDefaultProvider,
ecm_init_params, &entitlement_request))
.ok()) {
return status;
LOG(ERROR) << "Failed to initialize ECM class.";
return false;
}
FixedKeyFetcher fixed_key_fetcher(
/* even_entitlement_key_id= */ entitlement_key_id,
@@ -127,11 +127,13 @@ util::Status WvCasEcm::GenerateEcm(const std::string& even_key,
if (!(status = fixed_key_fetcher.RequestEntitlementKey(entitlement_request,
&entitlement_response))
.ok()) {
return status;
LOG(ERROR) << "Failed to get entitlement key.";
return false;
}
if (!(status = cas_ecm->ProcessCasEncryptionResponse(entitlement_response))
.ok()) {
return status;
LOG(ERROR) << "Failed to process entitlement key.";
return false;
}
// Generate ECM.
@@ -153,27 +155,27 @@ util::Status WvCasEcm::GenerateEcm(const std::string& even_key,
ecm_param.key_params[1].content_ivs.push_back(odd_content_iv);
*ecm = ecm_generator.GenerateEcm(ecm_param);
return util::OkStatus();
return true;
}
util::Status WvCasEcm::GenerateSingleKeyEcm(const std::string& even_key,
bool WvCasEcm::GenerateSingleKeyEcm(const std::string& even_key,
const std::string& even_content_iv,
const std::string& entitlement_key_id,
const std::string& entitlement_key,
std::string* ecm) const {
if (!initialized_) {
DCHECK(ecm);
return util::Status(util::error::INTERNAL,
"WvCasEcm has not been properly initialized");
if (!initialized_) {
LOG(ERROR) << "WvCasEcm has not been properly initialized";
return false;
}
if (key_rotation_enabled_) {
return util::Status(
util::error::INTERNAL,
"Please call GenerateEcm() instead when key rotation is enabled");
LOG(ERROR)
<< "Please call GenerateEcm() instead when key rotation is enabled";
return false;
}
if (even_content_iv.size() != content_iv_size_) {
return util::Status(util::error::INVALID_ARGUMENT,
"Size of content IV is incorrect");
LOG(ERROR) << "Size of content IV is incorrect";
return false;
}
// Create an instance of CasEcm in order to set the entitlement keys.
@@ -192,7 +194,8 @@ util::Status WvCasEcm::GenerateSingleKeyEcm(const std::string& even_key,
if (!(status = cas_ecm->Initialize(kDefaultContentId, kDefaultProvider,
ecm_init_params, &entitlement_request))
.ok()) {
return status;
LOG(ERROR) << "Failed to get initialize ECM class.";
return false;
}
FixedKeyFetcher fixed_key_fetcher(
/* even_entitlement_key_id= */ entitlement_key_id,
@@ -202,11 +205,13 @@ util::Status WvCasEcm::GenerateSingleKeyEcm(const std::string& even_key,
if (!(status = fixed_key_fetcher.RequestEntitlementKey(entitlement_request,
&entitlement_response))
.ok()) {
return status;
LOG(ERROR) << "Failed to get entitlement key.";
return false;
}
if (!(status = cas_ecm->ProcessCasEncryptionResponse(entitlement_response))
.ok()) {
return status;
LOG(ERROR) << "Failed to process entitlement key.";
return false;
}
// Generate ECM.
@@ -222,7 +227,7 @@ util::Status WvCasEcm::GenerateSingleKeyEcm(const std::string& even_key,
ecm_param.key_params[0].content_ivs.push_back(even_content_iv);
*ecm = ecm_generator.GenerateEcm(ecm_param);
return util::OkStatus();
return true;
}
} // namespace cas

20
media_cas_packager_sdk/public/wv_cas_ecm.h
View File

@@ -47,12 +47,12 @@ class WvCasEcm {
// only CTR is supported by Widevine CAS plugin for now
//
// Returns:
// - A status indicating whether there was any error during initialization
// - A boolean indicating whether there was any error during initialization
//
// Note:
// - 'even'/'odd' key in the ECM will be be encrypted using AEC_CBC
virtual util::Status Initialize(int content_iv_size,
bool key_rotation_enabled, int crypto_mode);
virtual bool Initialize(int content_iv_size, bool key_rotation_enabled,
int crypto_mode);
// Generate an ECM containing two keys (even and odd). Can be called when
// |key_rotation_enabled| is initialized to 'true'.
@@ -67,20 +67,18 @@ class WvCasEcm {
// - |ecm| for returning the generated ECM, must not be nullptr
//
// Returns:
// - A status indicating whether there was any error during processing
// - A boolean indicating whether there was any error during processing
//
// Note:
// - The same |entitlement_key| will be used to encrypt both |even_key|
// and |odd_key| in the ECM
// - Size of |even_content_iv| and |odd_content_iv| must match
// |content_iv_size| set during initialization
virtual util::Status GenerateEcm(const std::string& even_key,
const std::string& even_content_iv,
const std::string& odd_key,
virtual bool GenerateEcm(const std::string& even_key,
const std::string& even_content_iv, const std::string& odd_key,
const std::string& odd_content_iv,
const std::string& entitlement_key_id,
const std::string& entitlement_key,
std::string* ecm) const;
const std::string& entitlement_key, std::string* ecm) const;
// Generate an ECM containing only a singe even key. Can be called when
// |key_rotation_enabled| is initialized to 'false'.
@@ -93,12 +91,12 @@ class WvCasEcm {
// - |ecm| for returning the generated ECM, must not be nullptr
//
// Returns:
// - A status indicating whether there was any error during processing
// - A boolean indicating whether there was any error during processing
//
// Note:
// - Size of |even_content_iv| and |odd_content_iv| must match
// |content_iv_size| set during initialization
virtual util::Status GenerateSingleKeyEcm(const std::string& even_key,
virtual bool GenerateSingleKeyEcm(const std::string& even_key,
const std::string& even_content_iv,
const std::string& entitlement_key_id,
const std::string& entitlement_key,

73
media_cas_packager_sdk/public/wv_cas_ecm_test.cc
View File

@@ -30,94 +30,75 @@ class WvCasEcmTest : public Test {
};
TEST_F(WvCasEcmTest, InitializeTwice) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
EXPECT_EQ(util::error::INTERNAL,
wv_cas_ecm_
.Initialize(/* content_iv_size= */ 8,
EXPECT_FALSE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1)
.error_code());
/* crypto_mode= */ 1));
}
TEST_F(WvCasEcmTest, InitializeContentIvSize) {
EXPECT_EQ(
util::error::INVALID_ARGUMENT,
wv_cas_ecm_
.Initialize(/* content_iv_size= */ 4,
/* key_rotation_enabled= */ true, /* crypto_mode= */ 1)
.error_code());
EXPECT_FALSE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 4,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
}
TEST_F(WvCasEcmTest, InitializeCryptoMode) {
EXPECT_EQ(
util::error::INVALID_ARGUMENT,
wv_cas_ecm_
.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true, /* crypto_mode= */ 0)
.error_code());
EXPECT_FALSE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 0));
}
TEST_F(WvCasEcmTest, InitializeKeyRotationEnabled) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_EQ(util::error::INTERNAL,
wv_cas_ecm_.GenerateSingleKeyEcm("", "", "", "", &actual_ecm)
.error_code());
EXPECT_FALSE(wv_cas_ecm_.GenerateSingleKeyEcm("", "", "", "", &actual_ecm));
}
TEST_F(WvCasEcmTest, InitializeKeyRotationDisabled) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ false,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_EQ(util::error::INTERNAL,
wv_cas_ecm_.GenerateEcm("", "", "", "", "", "", &actual_ecm)
.error_code());
EXPECT_FALSE(wv_cas_ecm_.GenerateEcm("", "", "", "", "", "", &actual_ecm));
}
TEST_F(WvCasEcmTest, GenerateEcmInvalidContentIv) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_EQ(util::error::INVALID_ARGUMENT,
wv_cas_ecm_
.GenerateEcm(
EXPECT_FALSE(wv_cas_ecm_.GenerateEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */ kEvenContentIv8Bytes,
/* odd_key= */ kOddKey,
/* odd_content_iv= */ "123456789",
/* entitlement_key_id= */ kEntitlementKeyId,
/* entitlement_key= */ kEntitlementKey, &actual_ecm)
.error_code());
/* entitlement_key= */ kEntitlementKey, &actual_ecm));
}
TEST_F(WvCasEcmTest, GenerateSingleKeyEcmInvalidContentIv) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ false,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_EQ(util::error::INVALID_ARGUMENT,
wv_cas_ecm_
.GenerateSingleKeyEcm(
EXPECT_FALSE(wv_cas_ecm_.GenerateSingleKeyEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */ "1234",
/* entitlement_key_id= */ kEntitlementKeyId,
/* entitlement_key= */ kEntitlementKey, &actual_ecm)
.error_code());
/* entitlement_key= */ kEntitlementKey, &actual_ecm));
}
TEST_F(WvCasEcmTest, GenerateEcm8BytesContentIvSuccess) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_OK(wv_cas_ecm_.GenerateEcm(
EXPECT_TRUE(wv_cas_ecm_.GenerateEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */ kEvenContentIv8Bytes,
/* odd_key= */ kOddKey,
@@ -135,12 +116,12 @@ TEST_F(WvCasEcmTest, GenerateEcm8BytesContentIvSuccess) {
}
TEST_F(WvCasEcmTest, GenerateSingleKeyEcm8BytesContentIvSuccess) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 8,
/* key_rotation_enabled= */ false,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_OK(wv_cas_ecm_.GenerateSingleKeyEcm(
EXPECT_TRUE(wv_cas_ecm_.GenerateSingleKeyEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */ kEvenContentIv8Bytes,
/* entitlement_key_id= */ kEntitlementKeyId,
@@ -154,12 +135,12 @@ TEST_F(WvCasEcmTest, GenerateSingleKeyEcm8BytesContentIvSuccess) {
}
TEST_F(WvCasEcmTest, GenerateEcm16BytesContentIvSuccess) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 16,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 16,
/* key_rotation_enabled= */ true,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_OK(wv_cas_ecm_.GenerateEcm(
EXPECT_TRUE(wv_cas_ecm_.GenerateEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */
absl::StrCat(kEvenContentIv8Bytes, kEvenContentIv8Bytes),
@@ -179,12 +160,12 @@ TEST_F(WvCasEcmTest, GenerateEcm16BytesContentIvSuccess) {
}
TEST_F(WvCasEcmTest, GenerateSingleKeyEcm16BytesContentIvSuccess) {
EXPECT_OK(wv_cas_ecm_.Initialize(/* content_iv_size= */ 16,
EXPECT_TRUE(wv_cas_ecm_.Initialize(/* content_iv_size= */ 16,
/* key_rotation_enabled= */ false,
/* crypto_mode= */ 1));
std::string actual_ecm;
EXPECT_OK(wv_cas_ecm_.GenerateSingleKeyEcm(
EXPECT_TRUE(wv_cas_ecm_.GenerateSingleKeyEcm(
/* even_key= */ kEvenKey,
/* even_content_iv= */
absl::StrCat(kEvenContentIv8Bytes, kEvenContentIv8Bytes),