79f14e6e0b
Add example binary for testing building the SDK after 'git clone' from our repo. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=227583629
287 lines
10 KiB
C++
287 lines
10 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright 2013 Google LLC.
|
|
//
|
|
// This software is licensed under the terms defined in the Widevine Master
|
|
// License Agreement. For a copy of this agreement, please contact
|
|
// widevine-licensing@google.com.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "common/drm_service_certificate.h"
|
|
|
|
#include <map>
|
|
#include <memory>
|
|
#include <utility>
|
|
|
|
#include "glog/logging.h"
|
|
#include "base/thread_annotations.h"
|
|
#include "absl/strings/escaping.h"
|
|
#include "absl/synchronization/mutex.h"
|
|
#include "util/gtl/map_util.h"
|
|
#include "common/aes_cbc_util.h"
|
|
#include "common/certificate_type.h"
|
|
#include "common/drm_root_certificate.h"
|
|
#include "common/error_space.h"
|
|
#include "common/rsa_util.h"
|
|
#include "protos/public/client_identification.pb.h"
|
|
#include "protos/public/drm_certificate.pb.h"
|
|
#include "protos/public/errors.pb.h"
|
|
#include "protos/public/signed_drm_certificate.pb.h"
|
|
|
|
namespace widevine {
|
|
|
|
namespace {
|
|
|
|
// Class used to hold global service certificate map.
|
|
class DrmServiceCertificateMap {
|
|
public:
|
|
DrmServiceCertificateMap();
|
|
~DrmServiceCertificateMap();
|
|
|
|
DrmServiceCertificateMap(const DrmServiceCertificateMap&) = delete;
|
|
DrmServiceCertificateMap& operator=(const DrmServiceCertificateMap&) = delete;
|
|
|
|
void Reset();
|
|
void AddCert(std::unique_ptr<DrmServiceCertificate> new_cert);
|
|
void ClearDefaultDrmServiceCertificate();
|
|
const DrmServiceCertificate* GetDefaultCert();
|
|
const DrmServiceCertificate* GetCert(const std::string& serial_number);
|
|
|
|
static DrmServiceCertificateMap* GetInstance();
|
|
|
|
private:
|
|
absl::Mutex mutex_;
|
|
// Certificate serial number to certificate map.
|
|
std::map<std::string, std::unique_ptr<DrmServiceCertificate>> map_
|
|
GUARDED_BY(mutex_);
|
|
DrmServiceCertificate* default_cert_ GUARDED_BY(mutex_);
|
|
};
|
|
|
|
DrmServiceCertificateMap::DrmServiceCertificateMap() : default_cert_(nullptr) {}
|
|
DrmServiceCertificateMap::~DrmServiceCertificateMap() { Reset(); }
|
|
|
|
void DrmServiceCertificateMap::Reset() {
|
|
absl::WriterMutexLock lock(&mutex_);
|
|
map_.clear();
|
|
default_cert_ = nullptr;
|
|
}
|
|
|
|
void DrmServiceCertificateMap::AddCert(
|
|
std::unique_ptr<DrmServiceCertificate> new_cert) {
|
|
absl::WriterMutexLock lock(&mutex_);
|
|
|
|
std::unique_ptr<DrmServiceCertificate>* previous_cert =
|
|
gtl::FindOrNull(map_, new_cert->serial_number());
|
|
if (previous_cert != nullptr) {
|
|
if (default_cert_ == previous_cert->get()) {
|
|
default_cert_ = nullptr;
|
|
}
|
|
}
|
|
|
|
if (default_cert_ == nullptr) {
|
|
default_cert_ = new_cert.get();
|
|
}
|
|
const std::string& serial_number = new_cert->serial_number();
|
|
map_[serial_number] = std::move(new_cert);
|
|
}
|
|
|
|
void DrmServiceCertificateMap::ClearDefaultDrmServiceCertificate() {
|
|
absl::WriterMutexLock lock(&mutex_);
|
|
default_cert_ = nullptr;
|
|
}
|
|
|
|
const DrmServiceCertificate* DrmServiceCertificateMap::GetDefaultCert() {
|
|
absl::ReaderMutexLock lock(&mutex_);
|
|
return default_cert_;
|
|
}
|
|
|
|
const DrmServiceCertificate* DrmServiceCertificateMap::GetCert(
|
|
const std::string& serial_number) {
|
|
absl::ReaderMutexLock lock(&mutex_);
|
|
return map_[serial_number].get();
|
|
}
|
|
|
|
DrmServiceCertificateMap* DrmServiceCertificateMap::GetInstance() {
|
|
static auto* const kInstance = new DrmServiceCertificateMap();
|
|
return kInstance;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
Status DrmServiceCertificate::AddDrmServiceCertificate(
|
|
const DrmRootCertificate* root_drm_cert, const std::string& service_certificate,
|
|
const std::string& service_private_key,
|
|
const std::string& service_private_key_passphrase) {
|
|
DrmCertificate drm_cert;
|
|
Status status =
|
|
root_drm_cert->VerifyCertificate(service_certificate, nullptr, &drm_cert);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
if (drm_cert.type() != DrmCertificate::SERVICE) {
|
|
return Status(error_space, INVALID_SERVICE_CERTIFICATE,
|
|
"not-service-certificate");
|
|
}
|
|
if (drm_cert.provider_id().empty()) {
|
|
return Status(error_space, INVALID_SERVICE_CERTIFICATE,
|
|
"missing-certificate-service-id");
|
|
}
|
|
std::unique_ptr<RsaPublicKey> public_key(
|
|
RsaPublicKey::Create(drm_cert.public_key()));
|
|
if (!public_key) {
|
|
return Status(error_space, INVALID_SERVICE_CERTIFICATE,
|
|
"invalid-certificate-public-key");
|
|
}
|
|
std::string pkcs1_key;
|
|
if (!rsa_util::EncryptedPrivateKeyInfoToRsaPrivateKey(
|
|
service_private_key, service_private_key_passphrase, &pkcs1_key)) {
|
|
return Status(error_space, INVALID_SERVICE_PRIVATE_KEY,
|
|
"key-decryption-failed");
|
|
}
|
|
std::unique_ptr<RsaPrivateKey> private_key(RsaPrivateKey::Create(pkcs1_key));
|
|
if (private_key == nullptr) {
|
|
return Status(error_space, INVALID_SERVICE_PRIVATE_KEY,
|
|
"invalid-private-key");
|
|
}
|
|
|
|
std::unique_ptr<DrmServiceCertificate> new_cert(new DrmServiceCertificate(
|
|
service_certificate, drm_cert.provider_id(), drm_cert.serial_number(),
|
|
drm_cert.creation_time_seconds(), std::move(public_key),
|
|
std::move(private_key)));
|
|
DrmServiceCertificateMap::GetInstance()->AddCert(std::move(new_cert));
|
|
|
|
return OkStatus();
|
|
}
|
|
|
|
const DrmServiceCertificate*
|
|
DrmServiceCertificate::GetDefaultDrmServiceCertificate() {
|
|
return DrmServiceCertificateMap::GetInstance()->GetDefaultCert();
|
|
}
|
|
|
|
const DrmServiceCertificate*
|
|
DrmServiceCertificate::GetDefaultDrmServiceCertificateOrDie() {
|
|
const DrmServiceCertificate* default_cert =
|
|
DrmServiceCertificateMap::GetInstance()->GetDefaultCert();
|
|
CHECK(default_cert) << "Service Certificate not set!";
|
|
return default_cert;
|
|
}
|
|
|
|
const DrmServiceCertificate* DrmServiceCertificate::GetDrmServiceCertificate(
|
|
const std::string& serial_number) {
|
|
return DrmServiceCertificateMap::GetInstance()->GetCert(serial_number);
|
|
}
|
|
|
|
Status DrmServiceCertificate::SetDefaultDrmServiceCertificate(
|
|
const DrmRootCertificate* root_drm_cert, const std::string& service_certificate,
|
|
const std::string& service_private_key,
|
|
const std::string& service_private_key_passphrase) {
|
|
DrmServiceCertificateMap::GetInstance()->ClearDefaultDrmServiceCertificate();
|
|
return AddDrmServiceCertificate(root_drm_cert, service_certificate,
|
|
service_private_key,
|
|
service_private_key_passphrase);
|
|
}
|
|
|
|
Status DrmServiceCertificate::DecryptClientIdentification(
|
|
const EncryptedClientIdentification& encrypted_client_id,
|
|
ClientIdentification* client_id) {
|
|
DCHECK(client_id);
|
|
if (encrypted_client_id.service_certificate_serial_number().empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"missing-service-certificate-serial-number");
|
|
}
|
|
if (encrypted_client_id.provider_id().empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"missing-service-id");
|
|
}
|
|
if (encrypted_client_id.encrypted_client_id().empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"missing-encrypted-client-id");
|
|
}
|
|
if (encrypted_client_id.encrypted_client_id_iv().empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"missing-encrypted-client-id-iv");
|
|
}
|
|
if (encrypted_client_id.encrypted_privacy_key().empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"missing-encrypted-privacy-key");
|
|
}
|
|
std::string privacy_key;
|
|
std::string provider_id;
|
|
const DrmServiceCertificate* cert = GetDrmServiceCertificate(
|
|
encrypted_client_id.service_certificate_serial_number());
|
|
if (!cert) {
|
|
return Status(
|
|
error_space, SERVICE_CERTIFICATE_NOT_FOUND,
|
|
"service-certificate-not-found (SN " +
|
|
absl::BytesToHexString(
|
|
encrypted_client_id.service_certificate_serial_number()) +
|
|
")");
|
|
}
|
|
if (!cert->private_key()->Decrypt(encrypted_client_id.encrypted_privacy_key(),
|
|
&privacy_key)) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"privacy-key-decryption-failed");
|
|
}
|
|
if (cert->provider_id() != encrypted_client_id.provider_id()) {
|
|
return Status(error_space, SERVICE_CERTIFICATE_NOT_FOUND,
|
|
std::string("provider-id-mismatch (") + cert->provider_id() +
|
|
" / " + encrypted_client_id.provider_id() + ")");
|
|
}
|
|
std::string serialized_client_id(crypto_util::DecryptAesCbc(
|
|
privacy_key, encrypted_client_id.encrypted_client_id_iv(),
|
|
encrypted_client_id.encrypted_client_id()));
|
|
if (serialized_client_id.empty()) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"client-id-decryption-failed");
|
|
}
|
|
if (!client_id->ParseFromString(serialized_client_id)) {
|
|
return Status(error_space, INVALID_ENCRYPTED_CLIENT_IDENTIFICATION,
|
|
"client-id-parse-failed");
|
|
}
|
|
return OkStatus();
|
|
}
|
|
|
|
void DrmServiceCertificate::ResetServiceCertificates() {
|
|
DrmServiceCertificateMap::GetInstance()->Reset();
|
|
}
|
|
|
|
Status DrmServiceCertificate::ValidateDrmServiceCertificate() {
|
|
const DrmServiceCertificate* service_certificate =
|
|
GetDefaultDrmServiceCertificate();
|
|
if (!service_certificate) {
|
|
return Status(error_space, SERVICE_CERTIFICATE_NOT_FOUND,
|
|
"drm service certificate is not found.");
|
|
}
|
|
SignedDrmCertificate signed_cert;
|
|
if (!signed_cert.ParseFromString(service_certificate->certificate())) {
|
|
return Status(error_space, INVALID_DRM_CERTIFICATE,
|
|
"signed drm service certificate is failed to parse.");
|
|
}
|
|
DrmCertificate drm_cert;
|
|
if (!drm_cert.ParseFromString(signed_cert.drm_certificate())) {
|
|
return Status(error_space, INVALID_DRM_CERTIFICATE,
|
|
"Drm service certificate is failed to parse.");
|
|
}
|
|
if (!drm_cert.has_creation_time_seconds()) {
|
|
return Status(error_space, INVALID_SERVICE_CERTIFICATE,
|
|
"missing certificate creation time");
|
|
}
|
|
// TODO(user): Check creation_time_seconds field in DrmCertificate and also
|
|
// export the absl/time dependency through moe.
|
|
return OkStatus();
|
|
}
|
|
|
|
DrmServiceCertificate::DrmServiceCertificate(
|
|
const std::string& service_certificate, const std::string& provider_id,
|
|
const std::string& serial_number, const uint32_t creation_time_seconds,
|
|
std::unique_ptr<RsaPublicKey> public_key,
|
|
std::unique_ptr<RsaPrivateKey> private_key)
|
|
: certificate_(service_certificate),
|
|
provider_id_(provider_id),
|
|
serial_number_(serial_number),
|
|
creation_time_seconds_(creation_time_seconds),
|
|
public_key_(std::move(public_key)),
|
|
private_key_(std::move(private_key)) {}
|
|
|
|
} // namespace widevine
|