Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/GostCryptography/Gost_R3411/Gost_R3411_2012_256_HMAC.cs

@@ -0,0 +1,51 @@
+using GostCryptography.Base;
+using GostCryptography.Gost_28147_89;
+using GostCryptography.Native;
+using System.Security;
+
+namespace GostCryptography.Gost_R3411
+{
+    /// <summary>
+    /// Реализация HMAC на базе алгоритма хэширования ГОСТ Р 34.11-2012/256
+    /// </summary>
+    public sealed class Gost_R3411_2012_256_HMAC : Gost_R3411_HMAC<Gost_R3411_2012_256_HashAlgorithm>
+    {
+        /// <summary>
+        /// Наименование алгоритма HMAC на базе ГОСТ Р 34.11-2012/256
+        /// </summary>
+        public const string AlgorithmNameValue = "urn:ietf:params:xml:ns:cpxmlsec:algorithms:hmac-gostr34112012-256";
+
+        /// <summary>
+        /// Известные наименования алгоритма HMAC на базе ГОСТ Р 34.11-2012/256
+        /// </summary>
+        public static readonly string[] KnownAlgorithmNames = { AlgorithmNameValue };
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public Gost_R3411_2012_256_HMAC() : base(Gost_R3411_2012_256_HashAlgorithm.DefaultHashSizeValue)
+        {
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public Gost_R3411_2012_256_HMAC(ProviderType providerType) : base(providerType, Gost_R3411_2012_256_HashAlgorithm.DefaultHashSizeValue)
+        {
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public Gost_R3411_2012_256_HMAC(Gost_28147_89_SymmetricAlgorithmBase keyAlgorithm) : base(keyAlgorithm, Gost_R3411_2012_256_HashAlgorithm.DefaultHashSizeValue)
+        {
+        }
+
+        /// <inheritdoc />
+        public override string AlgorithmName => AlgorithmNameValue;
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected override SafeHashHandleImpl CreateHashHMAC(ProviderType providerType, SafeProvHandleImpl providerHandle, SafeKeyHandleImpl symKeyHandle)
+        {
+            return CryptoApiHelper.CreateHashHMAC_2012_256(providerType, providerHandle, symKeyHandle);
+        }
+    }
+}