1 files changed, 48 insertions, 0 deletions
diff --git a/crypto/aead_openssl.h b/crypto/aead_openssl.h
new file mode 100644
index 0000000..773cce1
--- /dev/null
+++ b/crypto/aead_openssl.h
@@ -0,0 +1,48 @@
+// Copyright 2015 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 CRYPTO_AEAD_H_
+#define CRYPTO_AEAD_H_
+
+#include "base/strings/string_piece.h"
+#include "crypto/crypto_export.h"
+
+struct evp_aead_st;
+
+namespace crypto {
+
+// This class exposes the AES-128-CTR-HMAC-SHA256 AEAD, currently only
+// for OpenSSL builds.
+class CRYPTO_EXPORT Aead {
+ public:
+  enum AeadAlgorithm { AES_128_CTR_HMAC_SHA256 };
+
+  explicit Aead(AeadAlgorithm algorithm);
+
+  ~Aead();
+
+  void Init(const std::string* key);
+
+  bool Seal(const base::StringPiece& plaintext,
+            const base::StringPiece& nonce,
+            const base::StringPiece& additional_data,
+            std::string* ciphertext) const;
+
+  bool Open(const base::StringPiece& ciphertext,
+            const base::StringPiece& nonce,
+            const base::StringPiece& additional_data,
+            std::string* plaintext) const;
+
+  size_t KeyLength() const;
+
+  size_t NonceLength() const;
+
+ private:
+  const std::string* key_;
+  const evp_aead_st* aead_;
+};
+
+}  // namespace crypto
+
+#endif  // CRYPTO_ENCRYPTOR_H_