Adding C++ auth metadata processor.

- We always do the processing asynchronously but maintain a synchronous
  API for the implementor of the processor.
- there are a lot of string copies right now. Having a StringPiece
  object in grpc++ would really help with that (as we would use it for
  C++ metadata).
- Please review the API carefully and if you're happy with it, I'll
  proceed with tests.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/cpp/common/secure_auth_context.h b/src/cpp/common/secure_auth_context.h
index 264ed620a3..1b27bf5c32 100644
--- a/src/cpp/common/secure_auth_context.h
+++ b/src/cpp/common/secure_auth_context.h
@@ -57,6 +57,12 @@ class SecureAuthContext GRPC_FINAL : public AuthContext {
 
   AuthPropertyIterator end() const GRPC_OVERRIDE;
 
+  void AddProperty(const grpc::string& key,
+                   const grpc::string& value) GRPC_OVERRIDE;
+
+  virtual bool SetPeerIdentityPropertyName(const grpc::string& name)
+      GRPC_OVERRIDE;
+
  private:
   grpc_auth_context* ctx_;
 };