Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/crypto/chacha20_poly1305_encrypter.h b/quic/core/crypto/chacha20_poly1305_encrypter.h
new file mode 100644
index 0000000..ca8aca8
--- /dev/null
+++ b/quic/core/crypto/chacha20_poly1305_encrypter.h
@@ -0,0 +1,36 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_ENCRYPTER_H_
+#define QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_ENCRYPTER_H_
+
+#include "base/macros.h"
+#include "net/third_party/quiche/src/quic/core/crypto/aead_base_encrypter.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+
+namespace quic {
+
+// A ChaCha20Poly1305Encrypter is a QuicEncrypter that implements the
+// AEAD_CHACHA20_POLY1305 algorithm specified in RFC 7539, except that
+// it truncates the Poly1305 authenticator to 12 bytes. Create an instance
+// by calling QuicEncrypter::Create(kCC20).
+//
+// It uses an authentication tag of 12 bytes (96 bits). The fixed prefix of the
+// nonce is four bytes.
+class QUIC_EXPORT_PRIVATE ChaCha20Poly1305Encrypter : public AeadBaseEncrypter {
+ public:
+ enum {
+ kAuthTagSize = 12,
+ };
+
+ ChaCha20Poly1305Encrypter();
+ ChaCha20Poly1305Encrypter(const ChaCha20Poly1305Encrypter&) = delete;
+ ChaCha20Poly1305Encrypter& operator=(const ChaCha20Poly1305Encrypter&) =
+ delete;
+ ~ChaCha20Poly1305Encrypter() override;
+};
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_ENCRYPTER_H_
