Relocate QUICHE files into quiche/ directory within the quiche repo, and change the relative include paths accordingly.

PiperOrigin-RevId: 440164720
Change-Id: I64d8a975d08888a3a86f6c51908e63d5cd45fa35
diff --git a/quiche/quic/core/crypto/quic_encrypter.h b/quiche/quic/core/crypto/quic_encrypter.h
new file mode 100644
index 0000000..6caf51b
--- /dev/null
+++ b/quiche/quic/core/crypto/quic_encrypter.h
@@ -0,0 +1,71 @@
+// Copyright (c) 2012 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_QUIC_ENCRYPTER_H_
+#define QUICHE_QUIC_CORE_CRYPTO_QUIC_ENCRYPTER_H_
+
+#include <cstddef>
+#include <memory>
+
+#include "absl/strings/string_view.h"
+#include "quiche/quic/core/crypto/quic_crypter.h"
+#include "quiche/quic/core/quic_packets.h"
+#include "quiche/quic/platform/api/quic_export.h"
+
+namespace quic {
+
+class QUIC_EXPORT_PRIVATE QuicEncrypter : public QuicCrypter {
+ public:
+  virtual ~QuicEncrypter() {}
+
+  static std::unique_ptr<QuicEncrypter> Create(const ParsedQuicVersion& version,
+                                               QuicTag algorithm);
+
+  // Creates an IETF QuicEncrypter based on |cipher_suite| which must be an id
+  // returned by SSL_CIPHER_get_id. The caller is responsible for taking
+  // ownership of the new QuicEncrypter.
+  static std::unique_ptr<QuicEncrypter> CreateFromCipherSuite(
+      uint32_t cipher_suite);
+
+  // Writes encrypted |plaintext| and a MAC over |plaintext| and
+  // |associated_data| into output. Sets |output_length| to the number of
+  // bytes written. Returns true on success or false if there was an error.
+  // |packet_number| is appended to the |nonce_prefix| value provided in
+  // SetNoncePrefix() to form the nonce. |output| must not overlap with
+  // |associated_data|. If |output| overlaps with |plaintext| then
+  // |plaintext| must be <= |output|.
+  virtual bool EncryptPacket(uint64_t packet_number,
+                             absl::string_view associated_data,
+                             absl::string_view plaintext,
+                             char* output,
+                             size_t* output_length,
+                             size_t max_output_length) = 0;
+
+  // Takes a |sample| of ciphertext and uses the header protection key to
+  // generate a mask to use for header protection, and returns that mask. On
+  // success, the mask will be at least 5 bytes long; on failure the string will
+  // be empty.
+  virtual std::string GenerateHeaderProtectionMask(
+      absl::string_view sample) = 0;
+
+  // Returns the maximum length of plaintext that can be encrypted
+  // to ciphertext no larger than |ciphertext_size|.
+  virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const = 0;
+
+  // Returns the length of the ciphertext that would be generated by encrypting
+  // to plaintext of size |plaintext_size|.
+  virtual size_t GetCiphertextSize(size_t plaintext_size) const = 0;
+
+  // Returns the maximum number of packets that can be safely encrypted with
+  // this encrypter.
+  virtual QuicPacketCount GetConfidentialityLimit() const = 0;
+
+  // For use by unit tests only.
+  virtual absl::string_view GetKey() const = 0;
+  virtual absl::string_view GetNoncePrefix() const = 0;
+};
+
+}  // namespace quic
+
+#endif  // QUICHE_QUIC_CORE_CRYPTO_QUIC_ENCRYPTER_H_