Add project

Basic formatting applied. Unnecessary comments have been removed. Suspicious code is covered by TODO.

Hcs.Client/GostCryptography/Gost_R3411/Gost_R3411_HashAlgorithm.cs

@@ -0,0 +1,89 @@
+using System.Security;
+
+using GostCryptography.Base;
+using GostCryptography.Native;
+
+namespace GostCryptography.Gost_R3411
+{
+    /// <summary>
+    /// Базовый класс для всех реализаций алгоритма хэширования ГОСТ Р 34.11
+    /// </summary>
+    public abstract class Gost_R3411_HashAlgorithm : GostHashAlgorithm, ISafeHandleProvider<SafeHashHandleImpl>
+    {
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected Gost_R3411_HashAlgorithm(int hashSize) : base(hashSize)
+        {
+            _hashHandle = CreateHashHandle();
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected Gost_R3411_HashAlgorithm(ProviderType providerType, int hashSize) : base(providerType, hashSize)
+        {
+            _hashHandle = CreateHashHandle();
+        }
+
+        [SecurityCritical]
+        internal Gost_R3411_HashAlgorithm(ProviderType providerType, SafeProvHandleImpl providerHandle, int hashSize) : base(providerType, hashSize)
+        {
+            _hashHandle = CreateHashHandle(providerHandle);
+        }
+
+        /// <summary>
+        /// Создает дескриптор функции хэширования криптографического провайдера
+        /// </summary>
+        [SecurityCritical]
+        protected SafeHashHandleImpl CreateHashHandle()
+        {
+            return CreateHashHandle(CryptoApiHelper.GetProviderHandle(ProviderType));
+        }
+
+        /// <summary>
+        /// Создает дескриптор функции хэширования криптографического провайдера
+        /// </summary>
+        [SecurityCritical]
+        protected abstract SafeHashHandleImpl CreateHashHandle(SafeProvHandleImpl providerHandle);
+
+        [SecurityCritical]
+        private SafeHashHandleImpl _hashHandle;
+
+        /// <inheritdoc />
+        SafeHashHandleImpl ISafeHandleProvider<SafeHashHandleImpl>.SafeHandle
+        {
+            [SecurityCritical]
+            get => _hashHandle;
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public override void Initialize()
+        {
+            _hashHandle.TryDispose();
+            _hashHandle = CreateHashHandle();
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected override void HashCore(byte[] data, int dataOffset, int dataLength)
+        {
+            CryptoApiHelper.HashData(_hashHandle, data, dataOffset, dataLength);
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected override byte[] HashFinal()
+        {
+            return CryptoApiHelper.EndHashData(_hashHandle);
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected override void Dispose(bool disposing)
+        {
+            _hashHandle.TryDispose();
+
+            base.Dispose(disposing);
+        }
+    }
+}