cyf
53 lines
1.9 KiB
C#
53 lines
1.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace Lskj.Util
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{ /// <summary>
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/// 验证密码强弱类
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/// </summary>
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public sealed class PwdStrengthHelp
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{
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/// <summary>
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/// 密码强度
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/// </summary>
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public enum Strength
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{
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Invalid = 0, //无效密码
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Weak = 1, //低强度密码
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Normal = 2, //中强度密码
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Strong = 3 //高强度密码
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};
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/// <summary>
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/// 计算密码强度
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/// </summary>
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/// <param name="password">密码字符串</param>
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/// <returns></returns>
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public static Strength PasswordStrength(string password)
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{
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//空字符串强度值为0
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if (password == "") return Strength.Weak;
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//字符统计
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int iNum = 0, iLtt = 0, iSym = 0;
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foreach (char c in password)
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{
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if (c >= '0' && c <= '9') iNum++;
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else if (c >= 'a' && c <= 'z') iLtt++;
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else if (c >= 'A' && c <= 'Z') iLtt++;
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else iSym++;
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}
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if (iLtt == 0 && iSym == 0) return Strength.Weak; //纯数字密码
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if (iNum == 0 && iLtt == 0) return Strength.Weak; //纯符号密码
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if (iNum == 0 && iSym == 0) return Strength.Weak; //纯字母密码
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if (password.Length <= 6) return Strength.Weak; //长度不大于6的密码
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if (iLtt == 0) return Strength.Normal; //数字和符号构成的密码
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if (iSym == 0) return Strength.Normal; //数字和字母构成的密码
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if (iNum == 0) return Strength.Normal; //字母和符号构成的密码
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if (password.Length <= 10) return Strength.Normal; //长度不大于10的密码
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return Strength.Strong; //由数字、字母、符号构成的密码
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}
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}
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}
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