Add token binding negotiation to QUIC

net/quic/crypto/quic_crypto_client_config.cc

Index: net/quic/crypto/quic_crypto_client_config.cc
diff --git a/net/quic/crypto/quic_crypto_client_config.cc b/net/quic/crypto/quic_crypto_client_config.cc
index b9b0bcd46fcfeec9fe1a7710e178eefde590c30e..eec1861e83068d4ec9da4e01a5aa357068d70520 100644
--- a/net/quic/crypto/quic_crypto_client_config.cc
+++ b/net/quic/crypto/quic_crypto_client_config.cc
@@ -497,6 +497,26 @@ QuicErrorCode QuicCryptoClientConfig::FillClientHello(
   out->SetTaglist(kAEAD, out_params->aead, 0);
   out->SetTaglist(kKEXS, out_params->key_exchange, 0);
 
+  if (!tb_key_params.empty()) {
+    const QuicTag* their_tbkps;
+    size_t num_their_tbkps;
+    switch (scfg->GetTaglist(kTBKP, &their_tbkps, &num_their_tbkps)) {
+      case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
+        break;
+      case QUIC_NO_ERROR:
+        if (QuicUtils::FindMutualTag(tb_key_params, their_tbkps,
+                                     num_their_tbkps, QuicUtils::LOCAL_PRIORITY,
+                                     &out_params->token_binding_key_param,
+                                     nullptr)) {
+          out->SetTaglist(kTBKP, out_params->token_binding_key_param, 0);
+        }
+        break;
+      default:
+        *error_details = "Invalid TBKP";
+        return QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER;
+    }
+  }
+
   StringPiece public_value;
   if (scfg->GetNthValue24(kPUBS, key_exchange_index, &public_value) !=
           QUIC_NO_ERROR) {