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Basic formatting applied. Unnecessary comments have been removed. Suspicious code is covered by TODO.
2025-08-12 11:21:10 +09:00
parent bbcbe841a7
commit 33ab055b43
546 changed files with 176950 additions and 0 deletions
--- a/Hcs.Client/GostCryptography/Gost_R3410/Gost_R3410_EphemeralAsymmetricAlgorithm.cs
+++ b/Hcs.Client/GostCryptography/Gost_R3410/Gost_R3410_EphemeralAsymmetricAlgorithm.cs
@ -0,0 +1,116 @@
+using GostCryptography.Asn1.Gost.Gost_R3410;
+using GostCryptography.Base;
+using GostCryptography.Native;
+using GostCryptography.Properties;
+using System;
+using System.Security;
+using System.Security.Cryptography;
+
+namespace GostCryptography.Gost_R3410
+{
+    /// <summary>
+    /// Реализация алгоритма формирования общих ключей на основе алгоритма ГОСТ Р 34.10 и эфимерного ключа
+    /// </summary>
+    public abstract class Gost_R3410_EphemeralAsymmetricAlgorithm<TKeyParams, TKeyAlgorithm> : Gost_R3410_AsymmetricAlgorithmBase<TKeyParams, TKeyAlgorithm>, ISafeHandleProvider<SafeProvHandleImpl>, ISafeHandleProvider<SafeKeyHandleImpl>
+        where TKeyParams : Gost_R3410_KeyExchangeParams
+        where TKeyAlgorithm : Gost_R3410_KeyExchangeAlgorithm
+    {
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected Gost_R3410_EphemeralAsymmetricAlgorithm(ProviderType providerType, int keySize) : base(providerType, keySize)
+        {
+            _providerHandle = CryptoApiHelper.GetProviderHandle(ProviderType).DangerousAddRef();
+            _keyHandle = CryptoApiHelper.GenerateKey(_providerHandle, ExchangeAlgId, CspProviderFlags.NoFlags);
+        }
+
+        /// <summary>
+        /// Конструктор
+        /// </summary>
+        /// <param name="providerType">Тип криптографического провайдера</param>
+        /// <param name="keyParameters">Параметры ключа, используемого для создания общего секретного ключа</param>
+        /// <param name="keySize">Размер ключа в битах</param>
+        /// <exception cref="ArgumentNullException"></exception>
+        /// <remarks>
+        /// В параметре <paramref name="keyParameters"/> достаточно передать идентификатор OID параметров хэширования
+        /// <see cref="Gost_R3410_KeyExchangeParams.DigestParamSet"/> и идентификатор OID параметров открытого ключа
+        /// <see cref="Gost_R3410_KeyExchangeParams.PublicKeyParamSet"/>. Остальные параметры не используются.
+        /// </remarks>
+        [SecuritySafeCritical]
+        protected Gost_R3410_EphemeralAsymmetricAlgorithm(ProviderType providerType, TKeyParams keyParameters, int keySize) : base(providerType, keySize)
+        {
+            if (keyParameters == null)
+            {
+                throw ExceptionUtility.ArgumentNull(nameof(keyParameters));
+            }
+
+            _providerHandle = CryptoApiHelper.GetProviderHandle(ProviderType).DangerousAddRef();
+            _keyHandle = CryptoApiHelper.GenerateDhEphemeralKey(providerType, _providerHandle, ExchangeAlgId, keyParameters.DigestParamSet, keyParameters.PublicKeyParamSet);
+        }
+
+        [SecurityCritical]
+        private readonly SafeProvHandleImpl _providerHandle;
+        [SecurityCritical]
+        private readonly SafeKeyHandleImpl _keyHandle;
+
+        /// <inheritdoc />
+        SafeProvHandleImpl ISafeHandleProvider<SafeProvHandleImpl>.SafeHandle
+        {
+            [SecurityCritical]
+            get => _providerHandle;
+        }
+
+        /// <inheritdoc />
+        SafeKeyHandleImpl ISafeHandleProvider<SafeKeyHandleImpl>.SafeHandle
+        {
+            [SecurityCritical]
+            get => _keyHandle;
+        }
+
+        /// <inheritdoc />
+        public override byte[] CreateSignature(byte[] hash)
+        {
+            throw ExceptionUtility.NotSupported(Resources.EphemKeyOperationNotSupported);
+        }
+
+        /// <inheritdoc />
+        public override bool VerifySignature(byte[] hash, byte[] signature)
+        {
+            throw ExceptionUtility.NotSupported(Resources.EphemKeyOperationNotSupported);
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public override TKeyAlgorithm CreateKeyExchange(TKeyParams keyParameters)
+        {
+            return CreateKeyExchangeAlgorithm(ProviderType, _providerHandle, _keyHandle, (TKeyParams)keyParameters.Clone());
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        public override TKeyParams ExportParameters(bool includePrivateKey)
+        {
+            if (includePrivateKey)
+            {
+                throw ExceptionUtility.NotSupported(Resources.EphemKeyOperationNotSupported);
+            }
+
+            return CryptoApiHelper.ExportPublicKey(_keyHandle, CreateKeyExchangeParams(), KeySizeValue);
+        }
+
+        /// <inheritdoc />
+        public override void ImportParameters(TKeyParams keyParameters)
+        {
+            throw ExceptionUtility.NotSupported(Resources.EphemKeyOperationNotSupported);
+        }
+
+        /// <inheritdoc />
+        [SecuritySafeCritical]
+        protected override void Dispose(bool disposing)
+        {
+            _keyHandle.TryDispose();
+            _providerHandle.TryDispose();
+
+            base.Dispose(disposing);
+        }
+    }
+}