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Diffstat (limited to 'wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/UnmanagedRandomSource.cs')
| -rw-r--r-- | wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/UnmanagedRandomSource.cs | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/UnmanagedRandomSource.cs b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/UnmanagedRandomSource.cs deleted file mode 100644 index 91ff64b..0000000 --- a/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/UnmanagedRandomSource.cs +++ /dev/null @@ -1,104 +0,0 @@ -// Copyright (C) 2024 Vaughn Nugent -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU Affero General Public License as -// published by the Free Software Foundation, either version 3 of the -// License, or (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Affero General Public License for more details. -// -// You should have received a copy of the GNU Affero General Public License -// along with this program. If not, see <https://www.gnu.org/licenses/>. - -using System; -using System.Runtime.InteropServices; - -using VNLib.Utils; -using VNLib.Utils.Native; -using VNLib.Utils.Extensions; - -namespace VNLib.Utils.Cryptography.Noscrypt -{ - - /// <summary> - /// A wrapper class for an unmanaged random source that conforms to the <see cref="IRandomSource"/> interface - /// </summary> - public class UnmanagedRandomSource : VnDisposeable, IRandomSource - { - /// <summary> - /// The explicit name of the unmanaged random function to get random bytes - /// </summary> - public const string RngFunctionName = "GetRandomBytes"; - - unsafe delegate void UnmanagedRandomSourceDelegate(byte* buffer, int size); - - private readonly bool OwnsHandle; - private readonly SafeLibraryHandle _library; - private readonly UnmanagedRandomSourceDelegate _getRandomBytes; - - /// <summary> - /// Loads the unmanaged random source from the given library - /// and attempts to get the random bytes method <see cref="RngFunctionName"/> - /// </summary> - /// <param name="path"></param> - /// <param name="search"></param> - /// <returns>The wrapped library that conforms to the <see cref="IRandomSource"/></returns> - public static UnmanagedRandomSource LoadLibrary(string path, DllImportSearchPath search) - { - //Try to load the library - SafeLibraryHandle lib = SafeLibraryHandle.LoadLibrary(path, search); - try - { - return new UnmanagedRandomSource(lib, true); - } - catch - { - //release lib - lib.Dispose(); - throw; - } - } - - /// <summary> - /// Creates the unmanaged random source from the given library - /// </summary> - /// <param name="lib">The library handle to wrap</param> - /// <exception cref="ObjectDisposedException"></exception> - /// <exception cref="EntryPointNotFoundException"></exception> - public UnmanagedRandomSource(SafeLibraryHandle lib, bool ownsHandle) - { - lib.ThrowIfClosed(); - - _library = lib; - - //get the method delegate - _getRandomBytes = lib.DangerousGetFunction<UnmanagedRandomSourceDelegate>(RngFunctionName); - - OwnsHandle = ownsHandle; - } - - ///<inheritdoc/> - public unsafe void GetRandomBytes(Span<byte> buffer) - { - _library.ThrowIfClosed(); - - //Fix buffer and call unmanaged method - fixed (byte* ptr = &MemoryMarshal.GetReference(buffer)) - { - _getRandomBytes(ptr, buffer.Length); - } - } - - ///<inheritdoc/> - protected override void Free() - { - if (OwnsHandle) - { - _library.Dispose(); - } - } - } -}
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