.net7 AesCng 加密解密封装,仅支持Windows平台

        /// <summary>
        /// AesCng 加密
        /// 仅支持Windows平台
        /// </summary>
        /// <param name="value">明文（待加密）</param>
        /// <param name="keyValue">密钥大小为 128 位、192 位和 256 位</param>
        /// <returns></returns>
        public static (string, string) AesCngEncrypt(string value, string keyValue)
        {
            if (OperatingSystem.IsWindows())
            {
                using (AesCng aesCng = new())
                {
                    aesCng.Key = Encoding.UTF8.GetBytes(keyValue);
                    aesCng.GenerateIV();
                    using (MemoryStream memoryStream = new())
                    {
                        using (CryptoStream cryptoStream = new(memoryStream, aesCng.CreateEncryptor(), CryptoStreamMode.Write))
                        {
                            byte[] plainText = Encoding.UTF8.GetBytes(value);
                            cryptoStream.Write(plainText, 0, plainText.Length);
                            cryptoStream.FlushFinalBlock();
                            return (Convert.ToBase64String(memoryStream.ToArray()), Convert.ToBase64String(aesCng.IV));
                        }
                    }
                }
            }
            else
            {
                return (string.Empty, string.Empty);
            }
        }
        /// <summary>
        /// AesCng 解密
        /// 仅支持Windows平台
        /// </summary>
        /// <param name="value">密文（待解密）</param>
        /// <param name="keyValue">密钥大小为 128 位、192 位和 256 位</param>
        /// <param name="iv">加密时的随机初始化向量 </param>
        /// <returns></returns>
        public static string AesCngDecrypt(string value, string keyValue, string iv)
        {
            if (OperatingSystem.IsWindows())
            {
                using (AesCng aesCng = new())
                {
                    aesCng.Key = Encoding.UTF8.GetBytes(keyValue);
                    aesCng.IV = Convert.FromBase64String(iv);
                    using (MemoryStream memoryStream = new(Convert.FromBase64String(value)))
                    {
                        using (CryptoStream cryptoStream = new(memoryStream, aesCng.CreateDecryptor(), CryptoStreamMode.Read))
                        {
                            using (MemoryStream plainStream = new())
                            {
                                cryptoStream.CopyTo(plainStream);
                                return Encoding.UTF8.GetString(plainStream.ToArray());
                            }
                        }
                    }
                }
            }
            else
            {
                return string.Empty;
            }
        }