DsJian/Utilities/PasswordUtil.cs

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using System;
using System.Collections.Generic;
using System.Text;

namespace DsJian
{
    public class PasswordUtil
    {
        public static readonly PasswordUtil Instance = new PasswordUtil();

        private int rep = 0;

        public string EncryptPassword(string password)
        {
            return FunctionUtils.MD5Encrypt(password);
        }

        /// <summary>
        /// 生成加密后密码
        /// </summary>
        /// <param name="password"></param>
        /// <returns></returns>
        public string GenerateEncodedPassword(string password)
        {
            return String.Concat("DS$", EncryptPassword(password));
        }

        /// <summary>
        /// 生成密码
        /// </summary>
        /// <returns></returns>
        public string GeneratePassword()
        {
            return GenerateCheckCode(10);
        }

        /// <summary>
        /// 生成随机字母字符串(数字字母混和)
        /// </summary>
        /// <param name="codeCount">待生成的位数</param>
        /// <returns>生成的字母字符串</returns>
        private string GenerateCheckCode(int codeCount)
        {
            string str = string.Empty;
            long num2 = DateTime.Now.Ticks + this.rep;
            this.rep++;
            Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> this.rep)));
            for (int i = 0; i < codeCount; i++)
            {
                char ch;
                int num = random.Next();
                if ((num % 2) == 0)
                {
                    ch = (char)(0x30 + ((ushort)(num % 10)));
                }
                else
                {
                    ch = (char)(0x41 + ((ushort)(num % 0x1a)));
                }
                str = str + ch.ToString();