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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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
*/
using System;
using System.Runtime.InteropServices;
using static Interop;
namespace Tizen.Security.SecureRepository
{
/// <summary>
/// Class that represents a key.
/// </summary>
public class Key : SafeHandle
{
/// <summary>
/// A constructor of Key that takes the binary, its type, and optional password of binary.
/// </summary>
/// <param name="binary">The binary value of a key. This binary may be encrypted with binaryPassword.</param>
/// <param name="type">The key's type.</param>
/// <param name="binaryPassword">The password used to decrypt binary when binary is encrypted.</param>
public Key(byte[] binary, KeyType type, string binaryPassword) : base(IntPtr.Zero, true)
{
this.SetHandle(IntPtr.Zero);
Binary = binary;
Type = type;
BinaryPassword = binaryPassword;
}
internal Key(IntPtr ptr, bool ownsHandle = true) : base(IntPtr.Zero, ownsHandle)
{
base.SetHandle(ptr);
CkmcKey ckmcKey = Marshal.PtrToStructure<CkmcKey>(handle);
Binary = new byte[(int)ckmcKey.size];
Marshal.Copy(ckmcKey.rawKey, Binary, 0, Binary.Length);
Type = (KeyType)ckmcKey.keyType;
BinaryPassword = ckmcKey.password;
}
/// <summary>
/// The binary value of a key.
/// </summary>
public byte[] Binary
{
get; set;
}
/// <summary>
/// The key's type.
/// </summary>
public KeyType Type
{
get; set;
}
/// <summary>
/// The password used to decrypt binary when binary is encrypted. It's optional.
/// </summary>
public string BinaryPassword
{
get; set;
}
internal CkmcKey ToCkmcKey()
{
byte[] bin = (Binary != null) ? Binary : new byte[0] ;
return new Interop.CkmcKey(new PinnedObject(bin),
bin.Length,
(int)Type,
BinaryPassword);
}
/// <summary>
/// Gets a value that indicates whether the handle is invalid.
/// </summary>
public override bool IsInvalid
{
get { return handle == IntPtr.Zero; }
}
/// <summary>
/// When overridden in a derived class, executes the code required to free the handle.
/// </summary>
/// <returns>true if the handle is released successfully</returns>
protected override bool ReleaseHandle()
{
if (IsInvalid) // do not release
return true;
Interop.CkmcTypes.KeyFree(handle);
this.SetHandle(IntPtr.Zero);
return true;
}
}
}
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