1 files changed, 69 insertions, 0 deletions
diff --git a/crypto/encryptor.h b/crypto/encryptor.h
new file mode 100644
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--- /dev/null
+++ b/crypto/encryptor.h
@@ -0,0 +1,69 @@
+// Copyright (c) 2011 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_ENCRYPTOR_H_
+#define CRYPTO_ENCRYPTOR_H_
+#pragma once
+
+#include <string>
+
+#include "build/build_config.h"
+
+#if defined(USE_NSS)
+#include "crypto/scoped_nss_types.h"
+#elif defined(OS_WIN)
+#include "crypto/scoped_capi_types.h"
+#endif
+
+namespace crypto {
+
+class SymmetricKey;
+
+class Encryptor {
+ public:
+  enum Mode {
+    CBC
+  };
+  Encryptor();
+  virtual ~Encryptor();
+
+  // Initializes the encryptor using |key| and |iv|. Returns false if either the
+  // key or the initialization vector cannot be used.
+  bool Init(SymmetricKey* key, Mode mode, const std::string& iv);
+
+  // Encrypts |plaintext| into |ciphertext|.
+  bool Encrypt(const std::string& plaintext, std::string* ciphertext);
+
+  // Decrypts |ciphertext| into |plaintext|.
+  bool Decrypt(const std::string& ciphertext, std::string* plaintext);
+
+  // TODO(albertb): Support streaming encryption.
+
+ private:
+  SymmetricKey* key_;
+  Mode mode_;
+
+#if defined(USE_OPENSSL)
+  bool Crypt(bool encrypt,  // Pass true to encrypt, false to decrypt.
+             const std::string& input,
+             std::string* output);
+  std::string iv_;
+#elif defined(USE_NSS)
+  ScopedPK11Slot slot_;
+  ScopedSECItem param_;
+#elif defined(OS_MACOSX)
+  bool Crypt(int /*CCOperation*/ op,
+             const std::string& input,
+             std::string* output);
+
+  std::string iv_;
+#elif defined(OS_WIN)
+  ScopedHCRYPTKEY capi_key_;
+  DWORD block_size_;
+#endif
+};
+
+}  // namespace crypto
+
+#endif  // CRYPTO_ENCRYPTOR_H_