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Merge changes Ib18af309,Iebd58823,Ic3a503ef

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* changes:
  Support renew on load
  Move functionality to policy_timer.
  Remove references to policy_timers_v15
This commit is contained in:
Rahul Frias
2022-12-22 08:11:29 +00:00
committed by Android (Google) Code Review
parent 1208c78e94 ab91cf934e
commit 609349c314
9 changed files with 269 additions and 406 deletions
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2
libwvdrmengine/cdm/Android.bp
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@@ -61,8 +61,8 @@ cc_library_static {
CORE_SRC_DIR + "/ota_keybox_provisioner.cpp", CORE_SRC_DIR + "/ota_keybox_provisioner.cpp",
CORE_SRC_DIR + "/policy_engine.cpp", CORE_SRC_DIR + "/policy_engine.cpp",
CORE_SRC_DIR + "/policy_timers.cpp", CORE_SRC_DIR + "/policy_timers.cpp",
CORE_SRC_DIR + "/policy_timers_v15.cpp",
CORE_SRC_DIR + "/policy_timers_v16.cpp", CORE_SRC_DIR + "/policy_timers_v16.cpp",
CORE_SRC_DIR + "/policy_timers_v18.cpp",
CORE_SRC_DIR + "/privacy_crypto_boringssl.cpp", CORE_SRC_DIR + "/privacy_crypto_boringssl.cpp",
CORE_SRC_DIR + "/service_certificate.cpp", CORE_SRC_DIR + "/service_certificate.cpp",
CORE_SRC_DIR + "/system_id_extractor.cpp", CORE_SRC_DIR + "/system_id_extractor.cpp",

56
libwvdrmengine/cdm/core/include/policy_timers.h
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@@ -10,6 +10,7 @@
#include "disallow_copy_and_assign.h" #include "disallow_copy_and_assign.h"
#include "license_protocol.pb.h" #include "license_protocol.pb.h"
#include "wv_cdm_constants.h"
#include "wv_cdm_types.h" #include "wv_cdm_types.h"
namespace wvcdm { namespace wvcdm {
@@ -43,20 +44,45 @@ class PolicyTimers {
// For offline save and restore // For offline save and restore
virtual int64_t GetPlaybackStartTime() { return playback_start_time_; } virtual int64_t GetPlaybackStartTime() { return playback_start_time_; }
virtual int64_t GetLastPlaybackTime() { return last_playback_time_; } virtual int64_t GetLastPlaybackTime() { return last_playback_time_; }
virtual int64_t GetGracePeriodEndTime() = 0; // This is a legacy field for offline licenses. Since no grace period is
// supported return a default value.
virtual int64_t GetGracePeriodEndTime() { return 0; }
virtual void RestorePlaybackTimes(int64_t current_time, virtual void RestorePlaybackTimes(int64_t current_time,
int64_t playback_start_time, int64_t playback_start_time,
int64_t last_playback_time, int64_t last_playback_time,
int64_t grace_period_end_time) = 0; int64_t grace_period_end_time);
virtual bool HasPlaybackStarted(int64_t current_time) = 0; virtual bool HasPlaybackStarted(int64_t /* current_time */) {
return playback_start_time_ != 0;
}
// For licenses that support core messages, evaluation of only rental and
// playback durations are needed.
virtual bool HasLicenseOrRentalOrPlaybackDurationExpired( virtual bool HasLicenseOrRentalOrPlaybackDurationExpired(
int64_t current_time) = 0; int64_t current_time) {
virtual bool HasPassedGracePeriod(int64_t current_time) = 0; return HasRentalOrPlaybackDurationExpired(current_time);
}
virtual bool HasPassedGracePeriod(int64_t /* current_time */) { return true; }
// This returns
// * before playback begins: the time remaining on |rental_duration_seconds|
// * after playback begins:
// - |soft_enforce_playback_duration| is true: the time remaining on
// |playback_duration_seconds|
// - |soft_enforce_playback_duration| is false: the minimum
// of the time remaining on |rental_duration_seconds| or
// |playback_duration_seconds|
//
// |license_duration_seconds| is ignored with the introduction of core
// messages
virtual int64_t GetLicenseOrRentalOrPlaybackDurationRemaining( virtual int64_t GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) = 0; int64_t current_time);
virtual int64_t GetLicenseOrRentalDurationRemaining(int64_t current_time) = 0; // This is only used in Query. This should return the time remaining on
// |rental_duration_seconds|.
virtual int64_t GetLicenseOrRentalDurationRemaining(int64_t current_time) {
return GetRentalDurationRemaining(current_time);
};
// This is only used in Query. This should return |playback_duration_seconds| // This is only used in Query. This should return |playback_duration_seconds|
// before playback begins or the time remaining on // before playback begins or the time remaining on
// |playback_duration_seconds| after playback begins. // |playback_duration_seconds| after playback begins.
@@ -72,7 +98,7 @@ class PolicyTimers {
virtual bool UpdateExpirationTime(int64_t current_time, int64_t* expiry_time); virtual bool UpdateExpirationTime(int64_t current_time, int64_t* expiry_time);
// Renewal related methods // Renewal related methods
virtual bool HasRenewalDelayExpired(int64_t current_time); virtual bool HasRenewalDelayExpired(int64_t current_time) = 0;
virtual bool HasRenewalRetryIntervalExpired(int64_t current_time); virtual bool HasRenewalRetryIntervalExpired(int64_t current_time);
virtual void UpdateRenewalRequest(int64_t current_time); virtual void UpdateRenewalRequest(int64_t current_time);
virtual bool HasRenewalRecoveryDurationExpired(int64_t current_time); virtual bool HasRenewalRecoveryDurationExpired(int64_t current_time);
@@ -90,11 +116,11 @@ class PolicyTimers {
was_expired_on_load_(false) {} was_expired_on_load_(false) {}
// Gets the clock time that the license expires based on whether we have // Gets the clock time that the license expires based on whether we have
// started playing. // started playing. This takes into account GetHardLicenseExpiryTime.
virtual int64_t GetExpiryTime(int64_t current_time, virtual int64_t GetExpiryTime(int64_t current_time,
bool ignore_soft_enforce_playback_duration) = 0; bool ignore_soft_enforce_playback_duration);
virtual int64_t GetRenewalStartTime() = 0; virtual int64_t GetRenewalStartTime() { return renewal_start_time_; }
// This is the current policy information for this license. This gets updated // This is the current policy information for this license. This gets updated
// as license renewals occur. // as license renewals occur.
@@ -105,12 +131,20 @@ class PolicyTimers {
int64_t last_playback_time_; int64_t last_playback_time_;
int64_t last_expiry_time_; int64_t last_expiry_time_;
int64_t last_expiry_time_set_; int64_t last_expiry_time_set_;
int64_t renewal_start_time_ = 0;
int64_t next_renewal_time_; int64_t next_renewal_time_;
// Indicates whether a persistent license was expired when loaded // Indicates whether a persistent license was expired when loaded
bool was_expired_on_load_; bool was_expired_on_load_;
private: private:
// Gets the clock time that the rental duration or playback will expire.
virtual int64_t GetRentalExpiryTime(int64_t current_time);
virtual int64_t GetPlaybackExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration);
bool HasRentalOrPlaybackDurationExpired(int64_t current_time);
virtual int64_t GetRentalDurationRemaining(int64_t current_time);
CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimers); CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimers);
}; };

97
libwvdrmengine/cdm/core/include/policy_timers_v15.h
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@@ -1,97 +0,0 @@
// Copyright 2020 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.
#ifndef WVCDM_CORE_POLICY_TIMERS_V15_H_
#define WVCDM_CORE_POLICY_TIMERS_V15_H_
#include <memory>
#include <string>
#include "disallow_copy_and_assign.h"
#include "license_protocol.pb.h"
#include "policy_timers.h"
#include "wv_cdm_types.h"
namespace wvcdm {
// OEMCrypto v16 and core messages introduced changes to how duration values
// and clocks should be evaluated. This class provides backward compatibility
// for licenses that do not include a core message. Durations are handled
// in the same way as in earlier releases.
//
// Backward compatibility may be needed if
// * OEMCrypto has not been upgraded to v16
// * Licenses were persisted before the device was upgraded to v16
// * License service does not yet support core messages
class PolicyTimersV15 : public PolicyTimers {
public:
PolicyTimersV15() : grace_period_end_time_(0) {}
~PolicyTimersV15() override {}
// UpdateLicense is used in handling a license response, a renewal response,
// or when restoring or releasing a persistent license.
// In a renewal the response may only contain policy fields that have
// changed. In this case an exact copy is not what we want to happen.
// |license_start_time_| is updated to the time mentioned in the renewal
// response.
// UpdateLicense will return false if |license_start_time| is not
// present or playback is not allowed due to policy or timer duration
// expiration.
bool UpdateLicense(int64_t current_time,
const video_widevine::License& license) override;
// Call this on first decrypt to set the start of playback.
void BeginDecryption(int64_t current_time) override;
// for offline save and restore
int64_t GetGracePeriodEndTime() override { return grace_period_end_time_; }
// for offline save and restore
void RestorePlaybackTimes(int64_t current_time, int64_t playback_start_time,
int64_t last_playback_time,
int64_t grace_period_end_time) override;
bool HasPlaybackStarted(int64_t current_time) override;
bool HasLicenseOrRentalOrPlaybackDurationExpired(
int64_t current_time) override;
bool HasPassedGracePeriod(int64_t current_time) override;
// This returns
// * for streaming licenses: the time remaining on |license_duration_seconds|
// * for persistent licenses: the time remaining on |rental_duration_seconds|
// before playback begins or the time remaining on
// |playback_duration_seconds| after.
int64_t GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) override;
// This is only used in Query. This should return the time remaining on
// |license_duration_seconds| for streaming licenses and
// |rental_duration_seconds| for persistent licenses.
int64_t GetLicenseOrRentalDurationRemaining(int64_t current_time) override;
protected:
// Gets the clock time that the license expires based on whether we have
// started playing. This takes into account GetHardLicenseExpiryTime.
int64_t GetExpiryTime(int64_t current_time,
bool ignore_soft_enforce_playback_duration) override;
int64_t GetRenewalStartTime() override { return license_start_time_; }
private:
// Gets the clock time that the license expires. This is the hard limit that
// all license types must obey at all times.
int64_t GetHardLicenseExpiryTime();
// Gets the clock time that the rental duration will expire, using the license
// duration if one is not present.
int64_t GetRentalExpiryTime();
int64_t grace_period_end_time_;
CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimersV15);
};
} // namespace wvcdm
#endif // WVCDM_CORE_POLICY_TIMERS_V15_H_

60
libwvdrmengine/cdm/core/include/policy_timers_v16.h
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@@ -43,68 +43,10 @@ class PolicyTimersV16 : public PolicyTimers {
// Call this on first decrypt to set the start of playback. // Call this on first decrypt to set the start of playback.
void BeginDecryption(int64_t current_time) override; void BeginDecryption(int64_t current_time) override;
// This is a legacy field for offline licenses. Since no grace period is // Renewal related methods
// supported return a default value.
int64_t GetGracePeriodEndTime() override { return 0; }
// For offline save and restore.
void RestorePlaybackTimes(int64_t current_time, int64_t playback_start_time,
int64_t last_playback_time,
int64_t grace_period_end_time) override;
bool HasPlaybackStarted(int64_t /* current_time */) override {
return playback_start_time_ != 0;
}
// For licenses that support core messages, evaluation of only rental and
// playback durations are needed.
bool HasLicenseOrRentalOrPlaybackDurationExpired(
int64_t current_time) override {
return HasRentalOrPlaybackDurationExpired(current_time);
}
bool HasPassedGracePeriod(int64_t /* current_time */) override {
return true;
}
// This returns
// * before playback begins: the time remaining on |rental_duration_seconds|
// * after playback begins:
// - |soft_enforce_playback_duration| is true: the time remaining on
// |playback_duration_seconds|
// - |soft_enforce_playback_duration| is false: the minimum
// of the time remaining on |rental_duration_seconds| or
// |playback_duration_seconds|
//
// |license_duration_seconds| is ignored with the introduction of core
// messages
int64_t GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) override;
// This is only used in Query. This should return the time remaining on
// |rental_duration_seconds|.
int64_t GetLicenseOrRentalDurationRemaining(int64_t current_time) override {
return GetRentalDurationRemaining(current_time);
};
bool HasRenewalDelayExpired(int64_t current_time) override; bool HasRenewalDelayExpired(int64_t current_time) override;
protected:
// Gets the clock time that the license expires based on whether we have
// started playing. This takes into account GetHardLicenseExpiryTime.
int64_t GetExpiryTime(int64_t current_time,
bool ignore_soft_enforce_playback_duration) override;
int64_t GetRenewalStartTime() override { return renewal_start_time_; }
private: private:
// Gets the clock time that the rental duration or playback will expire.
int64_t GetRentalExpiryTime(int64_t current_time);
int64_t GetPlaybackExpiryTime(int64_t current_time,
bool ignore_soft_enforce_playback_duration);
bool HasRentalOrPlaybackDurationExpired(int64_t current_time);
int64_t GetRentalDurationRemaining(int64_t current_time);
int64_t renewal_start_time_ = 0;
CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimersV16); CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimersV16);
}; };

56
libwvdrmengine/cdm/core/include/policy_timers_v18.h Normal file
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@@ -0,0 +1,56 @@
// Copyright 2022 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.
#ifndef WVCDM_CORE_POLICY_TIMERS_V18_H_
#define WVCDM_CORE_POLICY_TIMERS_V18_H_
#include "disallow_copy_and_assign.h"
#include "license_protocol.pb.h"
#include "policy_timers.h"
#include "wv_cdm_types.h"
namespace wvcdm {
// OEMCrypto v18 includes support for renewing licenses on load by using
// |initial_renewal_delay_base| and TimerDelayBase.
//
// Backward compatibility may be needed if
// * OEMCrypto has not been upgraded to v18
// * Licenses were persisted before the device was upgraded to v18
class PolicyTimersV18 : public PolicyTimers {
public:
PolicyTimersV18() {}
~PolicyTimersV18() override {}
// UpdateLicense is used in handling a license response, a renewal response,
// or when restoring or releasing a persistent license.
// In a renewal the response may only contain policy fields that have
// changed. In this case an exact copy is not what we want to happen.
// |renewal_start_time_| is set to the time mentioned in the renewal
// response.
// UpdateLicense will return false if |license_start_time| is not
// present or playback is not allowed due to policy or timer duration
// expiration.
bool UpdateLicense(int64_t current_time,
const video_widevine::License& license) override;
// Call this on first decrypt to set the start of playback.
void BeginDecryption(int64_t current_time) override;
// Renewal related methods
bool HasRenewalDelayExpired(int64_t current_time) override;
private:
// Indicates whether this is an initial license or a renewal
bool license_renewal_ = false;
bool renew_on_first_decrypt_ = false;
CORE_DISALLOW_COPY_AND_ASSIGN(PolicyTimersV18);
};
} // namespace wvcdm
#endif // WVCDM_CORE_POLICY_TIMERS_V18_H_

85
libwvdrmengine/cdm/core/src/policy_timers.cpp
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@@ -24,6 +24,28 @@ void PolicyTimers::DecryptionEvent(int64_t current_time) {
last_playback_time_ = current_time; last_playback_time_ = current_time;
} }
void PolicyTimers::RestorePlaybackTimes(int64_t current_time,
int64_t playback_start_time,
int64_t last_playback_time,
int64_t /* grace_period_end_time */) {
playback_start_time_ = (playback_start_time > 0) ? playback_start_time : 0;
last_playback_time_ = (last_playback_time > 0) ? last_playback_time : 0;
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ true);
was_expired_on_load_ =
expiry_time != NEVER_EXPIRES && expiry_time < current_time;
}
int64_t PolicyTimers::GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
if (expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (expiry_time < current_time) return 0;
return expiry_time - current_time;
}
int64_t PolicyTimers::GetPlaybackDurationRemaining(int64_t current_time) { int64_t PolicyTimers::GetPlaybackDurationRemaining(int64_t current_time) {
const int64_t playback_duration = policy_.playback_duration_seconds(); const int64_t playback_duration = policy_.playback_duration_seconds();
if (playback_duration == 0) return LLONG_MAX; if (playback_duration == 0) return LLONG_MAX;
@@ -85,12 +107,6 @@ bool PolicyTimers::UpdateExpirationTime(int64_t current_time,
return has_expiry_time_been_updated; return has_expiry_time_been_updated;
} }
bool PolicyTimers::HasRenewalDelayExpired(int64_t current_time) {
return policy_.can_renew() && (policy_.renewal_delay_seconds() > 0) &&
(license_start_time_ + policy_.renewal_delay_seconds() <=
current_time);
}
bool PolicyTimers::HasRenewalRetryIntervalExpired(int64_t current_time) { bool PolicyTimers::HasRenewalRetryIntervalExpired(int64_t current_time) {
return policy_.can_renew() && return policy_.can_renew() &&
(policy_.renewal_retry_interval_seconds() > 0) && (policy_.renewal_retry_interval_seconds() > 0) &&
@@ -107,4 +123,61 @@ bool PolicyTimers::HasRenewalRecoveryDurationExpired(int64_t current_time) {
current_time); current_time);
} }
int64_t PolicyTimers::GetExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration) {
const int64_t rental_expiry_time = GetRentalExpiryTime(current_time);
const int64_t playback_expiry_time = GetPlaybackExpiryTime(
current_time, ignore_soft_enforce_playback_duration);
if (rental_expiry_time == NEVER_EXPIRES) return playback_expiry_time;
if (playback_expiry_time == NEVER_EXPIRES) return rental_expiry_time;
return std::min(rental_expiry_time, playback_expiry_time);
}
// For the policy time fields checked in the following methods, a value of 0
// (UNLIMITED_DURATION) indicates that there is no limit to the duration.
// If the fields are UNLIMITED_DURATION then these methods will return
// NEVER_EXPIRES.
int64_t PolicyTimers::GetRentalExpiryTime(int64_t current_time) {
if (policy_.rental_duration_seconds() == UNLIMITED_DURATION)
return NEVER_EXPIRES;
if (HasPlaybackStarted(current_time) &&
policy_.soft_enforce_rental_duration())
return NEVER_EXPIRES;
return license_start_time_ + policy_.rental_duration_seconds();
}
int64_t PolicyTimers::GetPlaybackExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration) {
if (policy_.playback_duration_seconds() == UNLIMITED_DURATION)
return NEVER_EXPIRES;
if (!HasPlaybackStarted(current_time)) return NEVER_EXPIRES;
if (was_expired_on_load_) return current_time;
if (!ignore_soft_enforce_playback_duration &&
policy_.soft_enforce_playback_duration())
return NEVER_EXPIRES;
return playback_start_time_ + policy_.playback_duration_seconds();
}
int64_t PolicyTimers::GetRentalDurationRemaining(int64_t current_time) {
if (HasLicenseOrRentalOrPlaybackDurationExpired(current_time)) return 0;
const int64_t rental_expiry_time = GetRentalExpiryTime(current_time);
if (rental_expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (rental_expiry_time < current_time) return 0;
return rental_expiry_time - current_time;
}
bool PolicyTimers::HasRentalOrPlaybackDurationExpired(int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
return expiry_time != NEVER_EXPIRES && expiry_time <= current_time;
}
} // namespace wvcdm } // namespace wvcdm

154
libwvdrmengine/cdm/core/src/policy_timers_v15.cpp
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@@ -1,154 +0,0 @@
// Copyright 2020 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.
#include "policy_timers_v15.h"
#include <algorithm>
#include <string>
#include "log.h"
#include "wv_cdm_constants.h"
using video_widevine::License;
namespace {
const int64_t kTimeZero = 0;
} // namespace
namespace wvcdm {
bool PolicyTimersV15::UpdateLicense(int64_t current_time,
const License& license) {
if (!license.has_policy()) return false;
policy_.MergeFrom(license.policy());
// some basic license validation
// license start time needs to be specified in the initial response
if (!license.has_license_start_time()) return false;
// Update time information
license_start_time_ = license.license_start_time();
next_renewal_time_ = license_start_time_ + policy_.renewal_delay_seconds();
if (!policy_.can_play() ||
HasLicenseOrRentalOrPlaybackDurationExpired(current_time))
return false;
return true;
}
void PolicyTimersV15::BeginDecryption(int64_t current_time) {
if (playback_start_time_ == 0) {
playback_start_time_ = current_time;
last_playback_time_ = current_time;
if (policy_.play_start_grace_period_seconds() == 0)
grace_period_end_time_ = current_time;
}
}
void PolicyTimersV15::RestorePlaybackTimes(int64_t current_time,
int64_t playback_start_time,
int64_t last_playback_time,
int64_t grace_period_end_time) {
playback_start_time_ = std::max(playback_start_time, kTimeZero);
last_playback_time_ = std::max(last_playback_time, kTimeZero);
grace_period_end_time_ = grace_period_end_time;
if (policy_.play_start_grace_period_seconds() != 0) {
// If we are using grace period, we may need to override some of the values
// given to us by OEMCrypto. |grace_period_end_time| will be 0 if the grace
// period has not expired (effectively playback has not begun). Otherwise,
// |grace_period_end_time| contains the playback start time we should use.
playback_start_time_ = grace_period_end_time;
}
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ true);
was_expired_on_load_ =
expiry_time != NEVER_EXPIRES && expiry_time < current_time;
}
bool PolicyTimersV15::HasPlaybackStarted(int64_t current_time) {
if (playback_start_time_ == 0) return false;
const int64_t playback_time = current_time - playback_start_time_;
return playback_time >= policy_.play_start_grace_period_seconds();
}
bool PolicyTimersV15::HasLicenseOrRentalOrPlaybackDurationExpired(
int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
return expiry_time != NEVER_EXPIRES && expiry_time <= current_time;
}
bool PolicyTimersV15::HasPassedGracePeriod(int64_t current_time) {
if (grace_period_end_time_ == 0 && HasPlaybackStarted(current_time)) {
grace_period_end_time_ = playback_start_time_;
return true;
}
return false;
}
int64_t PolicyTimersV15::GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
if (expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (expiry_time < current_time) return 0;
return expiry_time - current_time;
}
int64_t PolicyTimersV15::GetLicenseOrRentalDurationRemaining(
int64_t current_time) {
if (HasLicenseOrRentalOrPlaybackDurationExpired(current_time)) return 0;
const int64_t license_expiry_time = GetRentalExpiryTime();
if (license_expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (license_expiry_time < current_time) return 0;
const int64_t policy_license_duration = policy_.license_duration_seconds();
if (policy_license_duration == UNLIMITED_DURATION)
return license_expiry_time - current_time;
return std::min(license_expiry_time - current_time, policy_license_duration);
}
// For the policy time fields checked in the following methods, a value of 0
// (UNLIMITED_DURATION) indicates that there is no limit to the duration.
// If the fields are UNLIMITED_DURATION (including the hard limit) then these
// methods will return NEVER_EXPIRES.
int64_t PolicyTimersV15::GetHardLicenseExpiryTime() {
return policy_.license_duration_seconds() > 0
? license_start_time_ + policy_.license_duration_seconds()
: NEVER_EXPIRES;
}
int64_t PolicyTimersV15::GetRentalExpiryTime() {
const int64_t hard_limit = GetHardLicenseExpiryTime();
if (policy_.rental_duration_seconds() == 0) return hard_limit;
const int64_t expiry_time =
license_start_time_ + policy_.rental_duration_seconds();
if (hard_limit == NEVER_EXPIRES) return expiry_time;
return std::min(hard_limit, expiry_time);
}
int64_t PolicyTimersV15::GetExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration) {
if (!HasPlaybackStarted(current_time)) return GetRentalExpiryTime();
const int64_t hard_limit = GetHardLicenseExpiryTime();
if (policy_.playback_duration_seconds() == 0) return hard_limit;
if (!ignore_soft_enforce_playback_duration && !was_expired_on_load_ &&
policy_.soft_enforce_playback_duration()) {
return hard_limit;
}
const int64_t expiry_time =
playback_start_time_ + policy_.playback_duration_seconds();
if (hard_limit == NEVER_EXPIRES) return expiry_time;
return std::min(hard_limit, expiry_time);
}
} // namespace wvcdm

78
libwvdrmengine/cdm/core/src/policy_timers_v16.cpp
View File

@@ -42,88 +42,10 @@ void PolicyTimersV16::BeginDecryption(int64_t current_time) {
} }
} }
void PolicyTimersV16::RestorePlaybackTimes(
int64_t current_time, int64_t playback_start_time,
int64_t last_playback_time, int64_t /* grace_period_end_time */) {
playback_start_time_ = (playback_start_time > 0) ? playback_start_time : 0;
last_playback_time_ = (last_playback_time > 0) ? last_playback_time : 0;
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ true);
was_expired_on_load_ =
expiry_time != NEVER_EXPIRES && expiry_time < current_time;
}
bool PolicyTimersV16::HasRentalOrPlaybackDurationExpired(int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
return expiry_time != NEVER_EXPIRES && expiry_time <= current_time;
}
int64_t PolicyTimersV16::GetLicenseOrRentalOrPlaybackDurationRemaining(
int64_t current_time) {
const int64_t expiry_time = GetExpiryTime(
current_time, /* ignore_soft_enforce_playback_duration */ false);
if (expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (expiry_time < current_time) return 0;
return expiry_time - current_time;
}
int64_t PolicyTimersV16::GetRentalDurationRemaining(int64_t current_time) {
if (HasLicenseOrRentalOrPlaybackDurationExpired(current_time)) return 0;
const int64_t rental_expiry_time = GetRentalExpiryTime(current_time);
if (rental_expiry_time == NEVER_EXPIRES) return LLONG_MAX;
if (rental_expiry_time < current_time) return 0;
return rental_expiry_time - current_time;
}
bool PolicyTimersV16::HasRenewalDelayExpired(int64_t current_time) { bool PolicyTimersV16::HasRenewalDelayExpired(int64_t current_time) {
return policy_.can_renew() && (policy_.renewal_delay_seconds() > 0) && return policy_.can_renew() && (policy_.renewal_delay_seconds() > 0) &&
(renewal_start_time_ + policy_.renewal_delay_seconds() <= (renewal_start_time_ + policy_.renewal_delay_seconds() <=
current_time); current_time);
} }
// For the policy time fields checked in the following methods, a value of 0
// (UNLIMITED_DURATION) indicates that there is no limit to the duration.
// If the fields are UNLIMITED_DURATION then these methods will return
// NEVER_EXPIRES.
int64_t PolicyTimersV16::GetRentalExpiryTime(int64_t current_time) {
if (policy_.rental_duration_seconds() == UNLIMITED_DURATION)
return NEVER_EXPIRES;
if (HasPlaybackStarted(current_time) &&
policy_.soft_enforce_rental_duration())
return NEVER_EXPIRES;
return license_start_time_ + policy_.rental_duration_seconds();
}
int64_t PolicyTimersV16::GetPlaybackExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration) {
if (policy_.playback_duration_seconds() == UNLIMITED_DURATION)
return NEVER_EXPIRES;
if (!HasPlaybackStarted(current_time)) return NEVER_EXPIRES;
if (was_expired_on_load_) return current_time;
if (!ignore_soft_enforce_playback_duration &&
policy_.soft_enforce_playback_duration())
return NEVER_EXPIRES;
return playback_start_time_ + policy_.playback_duration_seconds();
}
int64_t PolicyTimersV16::GetExpiryTime(
int64_t current_time, bool ignore_soft_enforce_playback_duration) {
const int64_t rental_expiry_time = GetRentalExpiryTime(current_time);
const int64_t playback_expiry_time = GetPlaybackExpiryTime(
current_time, ignore_soft_enforce_playback_duration);
if (rental_expiry_time == NEVER_EXPIRES) return playback_expiry_time;
if (playback_expiry_time == NEVER_EXPIRES) return rental_expiry_time;
return std::min(rental_expiry_time, playback_expiry_time);
}
} // namespace wvcdm } // namespace wvcdm

87
libwvdrmengine/cdm/core/src/policy_timers_v18.cpp Normal file
View File

@@ -0,0 +1,87 @@
// Copyright 2020 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.
#include "policy_timers_v18.h"
#include <algorithm>
#include "log.h"
#include "wv_cdm_constants.h"
using video_widevine::License;
namespace wvcdm {
bool PolicyTimersV18::UpdateLicense(int64_t current_time,
const License& license) {
if (!license.has_policy()) return false;
policy_.MergeFrom(license.policy());
// some basic license validation
// license start time needs to be specified in the initial response
if (!license.has_license_start_time()) return false;
// Update renewal information
if (license_renewal_) {
renewal_start_time_ = license.license_start_time();
next_renewal_time_ =
license.license_start_time() + policy_.renewal_delay_seconds();
} else {
// Initial license received, use |renewal_delay_base| in calcualtion
switch (license.policy().initial_renewal_delay_base()) {
case video_widevine::
License_Policy_TimerDelayBase_TIMER_DELAY_BASE_UNSPECIFIED:
case video_widevine::License_Policy_TimerDelayBase_LICENSE_START:
renewal_start_time_ = license.license_start_time();
break;
case video_widevine::License_Policy_TimerDelayBase_LICENSE_LOAD:
renewal_start_time_ = current_time;
break;
case video_widevine::License_Policy_TimerDelayBase_FIRST_DECRYPT:
break;
default:
LOGE("Unrecognized initial_renewal_delay_base value = %d",
license.policy().initial_renewal_delay_base());
renewal_start_time_ = license.license_start_time();
break;
}
if (!renew_on_first_decrypt_) {
next_renewal_time_ =
renewal_start_time_ + policy_.renewal_delay_seconds();
}
// Any subsequent calls to |UpdateLicense| will be license renewals
license_renewal_ = true;
}
if (!policy_.can_play() ||
HasLicenseOrRentalOrPlaybackDurationExpired(current_time))
return false;
return true;
}
void PolicyTimersV18::BeginDecryption(int64_t current_time) {
if (playback_start_time_ != 0) return;
playback_start_time_ = current_time;
last_playback_time_ = current_time;
if (renew_on_first_decrypt_) {
renewal_start_time_ = current_time;
next_renewal_time_ = renewal_start_time_ + policy_.renewal_delay_seconds();
renew_on_first_decrypt_ = false;
}
}
bool PolicyTimersV18::HasRenewalDelayExpired(int64_t current_time) {
if (renew_on_first_decrypt_ && playback_start_time_ == 0) return false;
return policy_.can_renew() &&
(renewal_start_time_ + policy_.renewal_delay_seconds() <=
current_time);
}
} // namespace wvcdm