Add a new prefer_aes finch options for QUIC.

Review URL: https://codereview.chromium.org/1165283004

Cr-Commit-Position: refs/heads/master@{#333805}

5 files changed, 11 insertions, 1 deletions

diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index c3d1f51..4b7edeb 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -98,6 +98,7 @@ HttpNetworkSession::Params::Params()
       quic_enable_connection_racing(false),
       quic_enable_non_blocking_io(false),
       quic_disable_disk_cache(false),
+      quic_prefer_aes(false),
       quic_max_number_of_lossy_connections(0),
       quic_packet_loss_threshold(1.0f),
       quic_socket_receive_buffer_size(kQuicSocketReceiveBufferSize),
@@ -147,6 +148,7 @@ HttpNetworkSession::HttpNetworkSession(const Params& params)
           params.quic_enable_connection_racing,
           params.quic_enable_non_blocking_io,
           params.quic_disable_disk_cache,
+          params.quic_prefer_aes,
           params.quic_max_number_of_lossy_connections,
           params.quic_packet_loss_threshold,
           params.quic_socket_receive_buffer_size,
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index 5ee2752..3327195 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -115,6 +115,7 @@ class NET_EXPORT HttpNetworkSession
     bool quic_enable_connection_racing;
     bool quic_enable_non_blocking_io;
     bool quic_disable_disk_cache;
+    bool quic_prefer_aes;
     int quic_max_number_of_lossy_connections;
     float quic_packet_loss_threshold;
     int quic_socket_receive_buffer_size;
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index 23d02cd..e1ca618 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -553,6 +553,7 @@ QuicStreamFactory::QuicStreamFactory(
     bool enable_connection_racing,
     bool enable_non_blocking_io,
     bool disable_disk_cache,
+    bool prefer_aes,
     int max_number_of_lossy_connections,
     float packet_loss_threshold,
     int socket_receive_buffer_size,
@@ -578,6 +579,7 @@ QuicStreamFactory::QuicStreamFactory(
       enable_connection_racing_(enable_connection_racing),
       enable_non_blocking_io_(enable_non_blocking_io),
       disable_disk_cache_(disable_disk_cache),
+      prefer_aes_(prefer_aes),
       max_number_of_lossy_connections_(max_number_of_lossy_connections),
       packet_loss_threshold_(packet_loss_threshold),
       socket_receive_buffer_size_(socket_receive_buffer_size),
@@ -602,7 +604,7 @@ QuicStreamFactory::QuicStreamFactory(
   bool has_aes_hardware_support = cpu.has_aesni() && cpu.has_avx();
   UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.PreferAesGcm",
                         has_aes_hardware_support);
-  if (has_aes_hardware_support)
+  if (has_aes_hardware_support || prefer_aes_)
     crypto_config_.PreferAesGcm();
   if (!IsEcdsaSupported())
     crypto_config_.DisableEcdsa();
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index 185da1f..25e03ea 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -115,6 +115,7 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
       bool enable_connection_racing,
       bool enable_non_blocking_io,
       bool disable_disk_cache,
+      bool prefer_aes,
       int max_number_of_lossy_connections,
       float packet_loss_threshold,
       int socket_receive_buffer_size,
@@ -345,6 +346,9 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
   // Set if we do not want to load server config from the disk cache.
   bool disable_disk_cache_;
 
+  // Set if AES-GCM should be preferred, even if there is no hardware support.
+  bool prefer_aes_;
+
   // Set if we want to disable QUIC when there is high packet loss rate.
   // Specifies the maximum number of connections with high packet loss in a row
   // after which QUIC will be disabled.
diff --git a/net/quic/quic_stream_factory_test.cc b/net/quic/quic_stream_factory_test.cc
index bc85df2..7ccd018 100644
--- a/net/quic/quic_stream_factory_test.cc
+++ b/net/quic/quic_stream_factory_test.cc
@@ -218,6 +218,7 @@ class QuicStreamFactoryTest : public ::testing::TestWithParam<TestParams> {
                  /*enable_connection_racing=*/false,
                  /*enable_non_blocking_io=*/true,
                  /*disable_disk_cache=*/false,
+                 /*prefer_aes=*/false,
                  /*max_number_of_lossy_connections=*/0,
                  /*packet_loss_threshold=*/1.0f,
                  /*receive_buffer_size=*/0,