reset has_valid_key after RatchetKey.

Author: cloudwebrtc

api/crypto/frame_crypto_transformer.cc

@@ -534,7 +534,7 @@ void FrameCryptorTransformer::decryptFrame(
     return;
   }
 
-  if(last_dec_error_ == kDecryptionFailed && !key_handler->have_valid_key) {
+  if(last_dec_error_ == kDecryptionFailed && !key_handler->has_valid_key) {
       // if decryption failed and we have an invalid key,
       // please try to decrypt with the next new key
       return;
@@ -584,6 +584,7 @@ void FrameCryptorTransformer::decryptFrame(
           decryption_success = true;
           // success, so we set the new key
           key_handler->SetKeyFromMaterial(new_material, key_index);
+          key_handler->has_valid_key = true;
           if (last_dec_error_ != FrameCryptionState::kKeyRatcheted) {
             last_dec_error_ = FrameCryptionState::kKeyRatcheted;
             if (observer_)
@@ -612,7 +613,7 @@ void FrameCryptorTransformer::decryptFrame(
   if (!decryption_success) {
     if (last_dec_error_ != FrameCryptionState::kDecryptionFailed) {
       last_dec_error_ = FrameCryptionState::kDecryptionFailed;
-      key_handler->have_valid_key = false;
+      key_handler->has_valid_key = false;
       if (observer_)
         observer_->OnFrameCryptionStateChanged(participant_id_,
                                                last_dec_error_);

api/crypto/frame_crypto_transformer.h

@@ -102,6 +102,7 @@ class ParticipantKeyHandler {
     }
     SetKeyFromMaterial(new_material,
                        key_index != -1 ? key_index : current_key_index_);
+    has_valid_key = true;
     return new_material;
   }
 
@@ -113,7 +114,7 @@ class ParticipantKeyHandler {
   virtual void SetKey(std::vector<uint8_t> password, int key_index) {
     webrtc::MutexLock lock(&mutex_);
     SetKeyFromMaterial(password, key_index);
-    have_valid_key = true;
+    has_valid_key = true;
   }
 
   std::vector<uint8_t> RatchetKeyMaterial(
@@ -145,8 +146,8 @@ class ParticipantKeyHandler {
     crypto_key_ring_[current_key_index_] =
         DeriveKeys(password, key_provider_->options().ratchet_salt, 128);
   }
- protected:
-  bool have_valid_key = false;
+protected:
+  bool has_valid_key = false;
  private:
   mutable webrtc::Mutex mutex_;
   int current_key_index_ = 0;