using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

public class KeyProvider
{
    /// <summary>
    /// 预设密钥，初始化系统时设置
    /// </summary>
    public static string DefaultKey { get; set; }

    /// <summary>
    /// 预设偏移量，初始化系统时设置
    /// </summary>
    public static string DefaultIV { get; set; }

    /// <summary>
    /// 预设对称加密工具
    /// </summary>
    public static IKeyProvider Default { get; set; }
}

/// <summary>
/// 对称加密密钥接口
/// </summary>
public interface IKeyProvider
{
    /// <summary>
    /// 密钥名称
    /// </summary>
    string CryptorName { get; }

    string Key { get; }

    string IV { get; }

    string Encrypt(string content);

    string Decrypt(string content);

}

public class KeyProviderRijndael : IKeyProvider
{
    private string _Key = "";
    private string _IV = "";

    public KeyProviderRijndael(string key, string iv)
    {
        this._Key = key;
        this._IV = iv;
    }

    public string CryptorName { get { return "Rijndael"; } }

    public string Key { get { return _Key; } }

    public string IV { get { return _IV; } }

    public string Encrypt(string content)
    {
        return CryptoHelperService.RijndaelEncrypt(content, _Key, _IV);
    }

    public string Decrypt(string content)
    {
        return CryptoHelperService.RijndaelDecrypt(content, _Key, _IV);
    }
}

//public class KeyProviderTripleDES : IKeyProvider
//{
//    private string _Key = "";
//    private string _IV = "";

//    public KeyProviderTripleDES(string key, string iv)
//    {
//        this._Key = key;
//        this._IV = iv;
//    }

//    public string CryptorName { get { return "TripleDES"; } }

//    public string Key { get { return _Key; } }

//    public string IV { get { return _IV; } }

//    public string Encrypt(string content)
//    {
//        return CryptoHelper.TripleDESEncrypt(content, _Key, _IV);
//    }

//    public string Decrypt(string content)
//    {
//        return CryptoHelper.TripleDESDecrypt(content, _Key, _IV);
//    }
//}

public class KeyProviderRSA : IKeyProvider
{
    private string _Key = "";
    private string _IV = "";

    public KeyProviderRSA(string publicKey)
    {
        this._Key = publicKey;
    }

    public string CryptorName { get { return "RSA"; } }

    public string Key { get { return _Key; } }

    public string IV { get { return _IV; } }

    public string Encrypt(string content)
    {
        return CryptoHelperService.RSAEncrypt(content, _Key);
    }

    public string Decrypt(string content)
    {
        return CryptoHelperService.RSADecrypt(content, _Key);
    }
}