基线 SVN r240

SVN-Revision: r240

插件库/Lskj.Util/PwdStrengthHelp.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Lskj.Util
+{   /// <summary>
+    /// 验证密码强弱类
+    /// </summary>
+    public sealed class PwdStrengthHelp
+    {
+        /// <summary>
+        /// 密码强度
+        /// </summary>
+        public enum Strength
+        {
+            Invalid = 0, //无效密码
+            Weak = 1, //低强度密码
+            Normal = 2, //中强度密码
+            Strong = 3 //高强度密码
+        };
+        /// <summary>
+        /// 计算密码强度
+        /// </summary>
+        /// <param name="password">密码字符串</param>
+        /// <returns></returns>
+        public static Strength PasswordStrength(string password)
+        {
+            //空字符串强度值为0
+            if (password == "") return Strength.Weak;
+            //字符统计
+            int iNum = 0, iLtt = 0, iSym = 0;
+            foreach (char c in password)
+            {
+                if (c >= '0' && c <= '9') iNum++;
+                else if (c >= 'a' && c <= 'z') iLtt++;
+                else if (c >= 'A' && c <= 'Z') iLtt++;
+                else iSym++;
+            }
+            if (iLtt == 0 && iSym == 0) return Strength.Weak; //纯数字密码
+            if (iNum == 0 && iLtt == 0) return Strength.Weak; //纯符号密码
+            if (iNum == 0 && iSym == 0) return Strength.Weak; //纯字母密码
+            if (password.Length <= 6) return Strength.Weak; //长度不大于6的密码
+            if (iLtt == 0) return Strength.Normal; //数字和符号构成的密码
+            if (iSym == 0) return Strength.Normal; //数字和字母构成的密码
+            if (iNum == 0) return Strength.Normal; //字母和符号构成的密码
+            if (password.Length <= 10) return Strength.Normal; //长度不大于10的密码
+            return Strength.Strong; //由数字、字母、符号构成的密码
+        }
+
+    }
+}