Use current time during CASE session handshake (#13462)

src/protocols/secure_channel/CASESession.cpp

@@ -1298,22 +1298,41 @@ CHIP_ERROR CASESession::RetrieveIPK(FabricId fabricId, MutableByteSpan & ipk)
  return CHIP_NO_ERROR;
 }
 
-// TODO: Remove this and replace with system method to retrieve current time
-CHIP_ERROR CASESession::SetEffectiveTime(void)
+CHIP_ERROR CASESession::GetHardcodedTime()
 {
  using namespace ASN1;
  ASN1UniversalTime effectiveTime;
 
- effectiveTime.Year = 2021;
- effectiveTime.Month = 2;
- effectiveTime.Day = 12;
+ effectiveTime.Year = 2022;
+ effectiveTime.Month = 1;
+ effectiveTime.Day = 1;
  effectiveTime.Hour = 10;
  effectiveTime.Minute = 10;
  effectiveTime.Second = 10;
 
  return ASN1ToChipEpochTime(effectiveTime, mValidContext.mEffectiveTime);
 }
 
+CHIP_ERROR CASESession::SetEffectiveTime()
+{
+ System::Clock::Milliseconds64 currentTimeMS;
+ CHIP_ERROR err = System::SystemClock().GetClock_RealTimeMS(currentTimeMS);
+ if (err == CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE)
+ {
+ ChipLogError(
+ SecureChannel,
+ "The device does not support GetClock_RealTimeMS() API. This will eventually result in CASE session setup failures.");
+ // TODO: Remove use of hardcoded time during CASE setup
+ return GetHardcodedTime();
+ }
+ ReturnErrorOnFailure(err);
+
+ System::Clock::Seconds32 currentTime = std::chrono::duration_cast<System::Clock::Seconds32>(currentTimeMS);
+ VerifyOrReturnError(UnixEpochToChipEpochTime(currentTime.count(), mValidContext.mEffectiveTime), CHIP_ERROR_INVALID_TIME);
+
+ return CHIP_NO_ERROR;
+}
+
 void CASESession::OnSuccessStatusReport()
 {
  ChipLogProgress(SecureChannel, "Success status report received. Session was established");

src/protocols/secure_channel/CASESession.h

@@ -226,8 +226,9 @@ class DLL_EXPORT CASESession : public Messaging::ExchangeDelegate, public Pairin
  */
  void DiscardExchange();
 
- // TODO: Remove this and replace with system method to retrieve current time
- CHIP_ERROR SetEffectiveTime(void);
+ CHIP_ERROR GetHardcodedTime();
+
+ CHIP_ERROR SetEffectiveTime();
 
  CHIP_ERROR ValidateReceivedMessage(Messaging::ExchangeContext * ec, const PayloadHeader & payloadHeader,
  System::PacketBufferHandle & msg);