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 34.11-94
    /// </summary>
    public sealed class Gost_R3411_94_HMAC : Gost_R3411_HMAC<Gost_R3411_94_HashAlgorithm>
    {
        /// <summary>
        /// Наименование алгоритма HMAC на базе ГОСТ Р 34.11-94
        /// </summary>
        public const string AlgorithmNameValue = "urn:ietf:params:xml:ns:cpxmlsec:algorithms:hmac-gostr3411";

        /// <summary>
        /// Устаревшее наименование алгоритма HMAC на базе ГОСТ Р 34.11-94
        /// </summary>
        public const string ObsoleteAlgorithmNameValue = "http://www.w3.org/2001/04/xmldsig-more#hmac-gostr3411";

        /// <summary>
        /// Известные наименования алгоритма HMAC на базе ГОСТ Р 34.11-94
        /// </summary>
        public static readonly string[] KnownAlgorithmNames = { AlgorithmNameValue, ObsoleteAlgorithmNameValue };

        /// <inheritdoc />
        [SecuritySafeCritical]
        public Gost_R3411_94_HMAC() : base(Gost_R3411_94_HashAlgorithm.DefaultHashSizeValue)
        {
        }

        /// <inheritdoc />
        [SecuritySafeCritical]
        public Gost_R3411_94_HMAC(ProviderType providerType) : base(providerType, Gost_R3411_94_HashAlgorithm.DefaultHashSizeValue)
        {
        }

        /// <inheritdoc />
        [SecuritySafeCritical]
        public Gost_R3411_94_HMAC(Gost_28147_89_SymmetricAlgorithmBase keyAlgorithm) : base(keyAlgorithm, Gost_R3411_94_HashAlgorithm.DefaultHashSizeValue)
        {
        }

        /// <inheritdoc />
        public override string AlgorithmName => AlgorithmNameValue;

        /// <inheritdoc />
        [SecuritySafeCritical]
        protected override SafeHashHandleImpl CreateHashHMAC(ProviderType providerType, SafeProvHandleImpl providerHandle, SafeKeyHandleImpl symKeyHandle)
        {
            return CryptoApiHelper.CreateHashHMAC_94(providerType, providerHandle, symKeyHandle);
        }
    }
}
