C# 使用BouncyCastle进行AEAD_AES_256_GCM加解密

国家实名认证使用到的加密

C# 使用BouncyCastle进行AEAD_AES_256_GCM 加密

         /// <summary>
        /// 使用BouncyCastle进行AEAD_AES_256_GCM 加密
        /// </summary>
        /// <param name="key">key32位字符</param>
        /// <param name="nonce">随机串12位</param>
        /// <param name="plainData">明文</param>
        /// <param name="associatedData">附加数据可能null</param>
        /// <returns></returns>
        public static string AesGcmEncryptByBouncyCastleBy(string key, string nonce, string plainData, string associatedData)
        {
   
   
            var associatedBytes = associatedData == null ? null : Encoding.UTF8.GetBytes(associatedData);
            byte[] byteData = StrToHexByte(key);
            byte[] values = GetRandomBytes(12);
            var gcmBlockCipher = new GcmBlockCipher(new AesEngine());
            var parameters = new AeadParameters(
                new KeyParameter(byteData),
                128, //128 = 16 * 8 => (tag size * 8)
                Encoding.UTF8.GetBytes(nonce),
                associatedBytes);

            gcmBlockCipher.Init(true, parameters);

            var data = Encoding.UTF8.GetBytes