Implement authenticator based on SPAKE2 implementation in boringssl.

remoting/protocol/BUILD.gn

Index: remoting/protocol/BUILD.gn
diff --git a/remoting/protocol/BUILD.gn b/remoting/protocol/BUILD.gn
index 1d24f31da95bc8a30b74817a431186f8b276ea22..bd09f87b821ae70bb951f7a0e50b6e90be35d1cd 100644
--- a/remoting/protocol/BUILD.gn
+++ b/remoting/protocol/BUILD.gn
@@ -28,6 +28,7 @@ source_set("protocol") {
     "//remoting/base",
     "//remoting/codec",
     "//remoting/signaling",
+    "//third_party/boringssl",
     "//third_party/libyuv",
   ]
 
@@ -54,6 +55,14 @@ source_set("protocol") {
       ]
     }
   }
+
+  if (!use_openssl) {
+    sources -= [
+      "spake2_authenticator.cc",
+      "spake2_authenticator.h",
+    ]
+    deps -= [ "//third_party/boringssl" ]
+  }
 }
 
 source_set("test_support") {
@@ -119,6 +128,7 @@ source_set("unit_tests") {
     "ppapi_module_stub.cc",
     "pseudotcp_adapter_unittest.cc",
     "session_config_unittest.cc",
+    "spake2_authenticator_unittest.cc",
     "ssl_hmac_channel_authenticator_unittest.cc",
     "third_party_authenticator_unittest.cc",
     "v2_authenticator_unittest.cc",
@@ -126,6 +136,10 @@ source_set("unit_tests") {
     "webrtc_transport_unittest.cc",
   ]
 
+  if (!use_openssl) {
+    sources -= [ "spake2_authenticator_unittest.cc" ]
+  }
+
   deps = [
     ":test_support",
     "//testing/gmock",