datacontrolsys/StationTotalSys(2.2.0.8)/Common/Encryption.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;

namespace Common
{
    public enum EncryptionType
    {
        MD5,
        NONE
    }

    public class Encryption
    {
        /// <summary>
        /// AES加密 
        /// </summary>
        /// <param name="text">明文</param>
        /// <param name="password">密钥</param>
        /// <param name="iv">向量</param>
        /// <returns></returns>
        public static string AESEncrypt(string text, string password)
        {

            //, string iv
            RijndaelManaged rijndaelManaged = new RijndaelManaged();
            rijndaelManaged.Mode = CipherMode.ECB;
            rijndaelManaged.Padding = PaddingMode.PKCS7;
            rijndaelManaged.KeySize = 128;
            rijndaelManaged.BlockSize = 128;

            byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(password);
            byte[] keyBytes = new byte[16];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
            {
                len = keyBytes.Length;
            }
            System.Array.Copy(pwdBytes, keyBytes, len);
            rijndaelManaged.Key = keyBytes;

            //byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
            //rijndaelManaged.IV = ivBytes;

            ICryptoTransform iCryptoTransform = rijndaelManaged.CreateEncryptor();
            byte[] textBytes = Encoding.UTF8.GetBytes(text);
            byte[] targetBytes = iCryptoTransform.TransformFinalBlock(textBytes, 0, textBytes.Length);
            return Convert.ToBase64String(targetBytes);

        }
        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="text">密文</param>
        /// <param name="password">密钥</param>
        /// <param name="iv">向量</param>
        /// <returns></returns>
        public static string AESDecrypt(string text, string password)
        {
            //, string iv
            RijndaelManaged rijndaelManaged = new RijndaelManaged();
            rijndaelManaged.Mode = CipherMode.ECB;
            rijndaelManaged.Padding = PaddingMode.PKCS7;
            rijndaelManaged.KeySize = 128;
            rijndaelManaged.BlockSize = 128;

            byte[] encryptedData = Convert.FromBase64String(text);
            byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(password);
            byte[] keyBytes = new byte[16];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
            {
                len = keyBytes.Length;
            }
            System.Array.Copy(pwdBytes, keyBytes, len);
            rijndaelManaged.Key = keyBytes;

            //byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
            //rijndaelManaged.IV = ivBytes;

            ICryptoTransform iCryptoTransform = rijndaelManaged.CreateDecryptor();
            byte[] targetBytes = iCryptoTransform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
            return Encoding.UTF8.GetString(targetBytes);
        }


        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string MD5Encrypt(string str)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            string returnStr = "";
            byte[] strBytes = Encoding.UTF8.GetBytes(str);
            byte[] binfile_md5_bytes = md5.ComputeHash(strBytes);
            if (binfile_md5_bytes != null)
            {
                for (int i = 0; i < binfile_md5_bytes.Length; i++)
                {
                    returnStr += binfile_md5_bytes[i].ToString("X2");
                }
            }
            return returnStr;
        }


        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="b"></param>
        /// <returns></returns>
        public static string MD5Encrypt(byte[] b)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            string returnStr = "";
            byte[] binfile_md5_bytes = md5.ComputeHash(b);
            if (binfile_md5_bytes != null)
            {
                for (int i = 0; i < binfile_md5_bytes.Length; i++)
                {
                    returnStr += binfile_md5_bytes[i].ToString("X2");
                }
            }

            return returnStr;
        }
    }
}