using System.Security;

using GostCryptography.Base;
using GostCryptography.Gost_28147_89;

namespace GostCryptography.Gost_R3411
{
    /// <summary>
    /// Реализация PRF на базе алгоритма хэширования ГОСТ Р 34.11-2012/256
    /// </summary>
    public sealed class Gost_R3411_2012_256_PRF : Gost_R3411_PRF<Gost_R3411_2012_256_HMAC>
    {
        /// <summary>
        /// Наименование алгоритма PRF на базе ГОСТ Р 34.11-2012/256 для использования в протоколе WS-Trust
        /// </summary>
        public const string WsTrustAlgorithmNameValue = "urn:ietf:params:xml:ns:cpxmlsec:algorithms:ck-p-gostr3411-2012-256";

        /// <summary>
        /// Наименование алгоритма PRF на базе ГОСТ Р 34.11-2012/256 для использования в протоколах на базе WS-SecureConversation
        /// </summary>
        public const string WsSecureConversationAlgorithmNameValue = "urn:ietf:params:xml:ns:cpxmlsec:algorithms:dk-p-gostr3411-2012-256";

        /// <summary>
        /// Известные наименования алгоритма PRF на базе ГОСТ Р 34.11-2012/256
        /// </summary>
        public static readonly string[] KnownAlgorithmNames = { WsTrustAlgorithmNameValue, WsSecureConversationAlgorithmNameValue };

        /// <inheritdoc />
        [SecuritySafeCritical]
        public Gost_R3411_2012_256_PRF(Gost_28147_89_SymmetricAlgorithmBase key, byte[] label, byte[] seed) : base(key, label, seed)
        {
        }

        /// <inheritdoc />
        [SecuritySafeCritical]
        public Gost_R3411_2012_256_PRF(ProviderType providerType, byte[] key, byte[] label, byte[] seed) : base(providerType, key, label, seed)
        {
        }

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

        /// <inheritdoc />
        [SecuritySafeCritical]
        protected override Gost_R3411_2012_256_HMAC CreateHMAC(Gost_28147_89_SymmetricAlgorithm key)
        {
            return new Gost_R3411_2012_256_HMAC(key);
        }
    }
}