added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / core / realm / util / aes_cryptor.hpp

diff --git a/iOS/Pods/Realm/include/core/realm/util/aes_cryptor.hpp b/iOS/Pods/Realm/include/core/realm/util/aes_cryptor.hpp
new file mode 100644 (file)
index 0000000..86adb96
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+++ b/iOS/Pods/Realm/include/core/realm/util/aes_cryptor.hpp
@@ -0,0 +1,101 @@
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#include <cstddef>
+#include <memory>
+#include <realm/util/features.h>
+#include <cstdint>
+#include <vector>
+#include <realm/util/file.hpp>
+
+#if REALM_ENABLE_ENCRYPTION
+
+#if REALM_PLATFORM_APPLE
+#include <CommonCrypto/CommonCrypto.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#include <stdio.h>
+#include <bcrypt.h>
+#pragma comment(lib, "bcrypt.lib")
+#else
+#include <openssl/aes.h>
+#include <openssl/sha.h>
+#endif
+
+namespace realm {
+namespace util {
+
+struct iv_table;
+class EncryptedFileMapping;
+
+class AESCryptor {
+public:
+    AESCryptor(const uint8_t* key);
+    ~AESCryptor() noexcept;
+
+    void set_file_size(off_t new_size);
+
+    bool read(FileDesc fd, off_t pos, char* dst, size_t size);
+    void write(FileDesc fd, off_t pos, const char* src, size_t size) noexcept;
+
+private:
+    enum EncryptionMode {
+#if REALM_PLATFORM_APPLE
+        mode_Encrypt = kCCEncrypt,
+        mode_Decrypt = kCCDecrypt
+#elif defined(_WIN32)
+        mode_Encrypt = 0,
+        mode_Decrypt = 1
+#else
+        mode_Encrypt = AES_ENCRYPT,
+        mode_Decrypt = AES_DECRYPT
+#endif
+    };
+
+#if REALM_PLATFORM_APPLE
+    CCCryptorRef m_encr;
+    CCCryptorRef m_decr;
+#elif defined(_WIN32)
+    BCRYPT_KEY_HANDLE m_aes_key_handle;
+#else
+    AES_KEY m_ectx;
+    AES_KEY m_dctx;
+#endif
+
+    uint8_t m_hmacKey[32];
+    std::vector<iv_table> m_iv_buffer;
+    std::unique_ptr<char[]> m_rw_buffer;
+    std::unique_ptr<char[]> m_dst_buffer;
+
+    void calc_hmac(const void* src, size_t len, uint8_t* dst, const uint8_t* key) const;
+    bool check_hmac(const void* data, size_t len, const uint8_t* hmac) const;
+    void crypt(EncryptionMode mode, off_t pos, char* dst, const char* src, const char* stored_iv) noexcept;
+    iv_table& get_iv_table(FileDesc fd, off_t data_pos) noexcept;
+};
+
+struct SharedFileInfo {
+    FileDesc fd;
+    AESCryptor cryptor;
+    std::vector<EncryptedFileMapping*> mappings;
+
+    SharedFileInfo(const uint8_t* key, FileDesc file_descriptor);
+};
+}
+}
+
+#endif // REALM_ENABLE_ENCRYPTION