RijndaelManaged 自定义key和iv

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Security.Cryptography;

namespace SynEncrption
{
    public partial class Form1 : Form
    {
        private string key = "abcde234123@#ew9182h4r1238132&AUIFQEIfaidsfnqeiqewrndsifqnwqiwernqewiqeiqe";
        private string iv = "s9afn1@#$!#asdfiqwnerasidfnqwiesndaf912#$!@341";

        public Form1()
        {
            InitializeComponent();
        }
     
        private void smbEncrpty_Click(object sender, EventArgs e)
        {
            string text = encrption(this.memoEdit1.Text, key.Substring(0, 32), iv.Substring(0, 16));
            this.memoEdit2.Text = text;
        }

        private string encrption(string input, string key, string iv)
        {
            MemoryStream msEncrypt = null;
            RijndaelManaged aesAlg = null;

            string sresult = string.Empty;

            try
            {
                byte[] keys = System.Text.Encoding.UTF8.GetBytes(key);
                byte[] ivs = System.Text.Encoding.UTF8.GetBytes(iv);
                aesAlg = new RijndaelManaged();

                aesAlg.Key = keys;
                aesAlg.IV = ivs;

                ICryptoTransform ict = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
                msEncrypt = new MemoryStream();

                using (CryptoStream cts = new CryptoStream(msEncrypt, ict, CryptoStreamMode.Write))
                {
                    using (StreamWriter sw = new StreamWriter(cts))
                    {
                        sw.Write(input);
                    }
                }

            }
            finally
            {
                if (aesAlg != null)
                {
                    aesAlg.Dispose();
                    aesAlg.Clear();
                }
            }

            if (msEncrypt != null)
            {
                byte[] content = msEncrypt.ToArray();

                sresult = Convert.ToBase64String(content);
            }

            return sresult;
        }

        private string decrption(string input, string key, string iv)
        {
            string sresult = string.Empty;

            byte[] keys = System.Text.Encoding.UTF8.GetBytes(key);
            byte[] ivs = System.Text.Encoding.UTF8.GetBytes(iv);

            byte[] inputbytes = Convert.FromBase64String(input);

            RijndaelManaged rm =null;

            try
            {
                rm = new RijndaelManaged();
                rm.Key = keys;
                rm.IV = ivs;

                ICryptoTransform ict = rm.CreateDecryptor(rm.Key, rm.IV);

                using (MemoryStream ms = new MemoryStream(inputbytes))
                {
                    using (CryptoStream cs = new CryptoStream(ms, ict, CryptoStreamMode.Read))
                    {
                        using (StreamReader sr = new StreamReader(cs))
                        {
                            sresult = sr.ReadToEnd();
                        }
                    }
                }

            }
            finally
            {
                if (rm != null)
                {
                    rm.Dispose();
                    rm.Clear();
                }
            }

            return sresult;
        }

        private void smbDecrypt_Click(object sender, EventArgs e)
        {
            string text = decrption(this.memoEdit2.Text, key.Substring(0, 32), iv.Substring(0, 16));
            this.memoEdit3.Text = text;
        }
    }
}