cyf
111 lines
3.6 KiB
C#
111 lines
3.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Security.Cryptography;
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namespace Zhaizj.Framework {
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/// <summary>
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/// 常用 hash 算法类型
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/// </summary>
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public enum HashType {
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MD5,
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MD5_16,
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SHA1,
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SHA256,
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SHA384,
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SHA512
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}
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/// <summary>
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/// 封装了常用 hash 算法
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/// </summary>
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public class HashTool : IHashTool {
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/// <summary>
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/// 根据指定的 hash 算法，加密字符串(比如密码)
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/// </summary>
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/// <param name="pwd">需要 hash 的字符串</param>
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/// <param name="ht">hash 算法类型</param>
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/// <returns></returns>
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public virtual String Get( String pwd, HashType ht ) {
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HashAlgorithm algorithm;
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if (ht == HashType.MD5 || ht == HashType.MD5_16)
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algorithm = MD5.Create();
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else if (ht == HashType.SHA1)
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algorithm = SHA1CryptoServiceProvider.Create();
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else if (ht == HashType.SHA256)
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algorithm = SHA256Managed.Create();
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else if (ht == HashType.SHA384)
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algorithm = SHA384Managed.Create();
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else if (ht == HashType.SHA512)
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algorithm = SHA512Managed.Create();
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else
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algorithm = MD5.Create();
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byte[] buffer = Encoding.UTF8.GetBytes( pwd );
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String result = BitConverter.ToString( algorithm.ComputeHash( buffer ) ).Replace( "-", "" );
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if (ht == HashType.MD5_16) return result.Substring( 8, 16 ).ToLower();
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return result;
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}
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/// <summary>
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/// 根据 hash 算法和指定的 salt，加密字符串
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/// </summary>
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/// <param name="pwd"></param>
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/// <param name="salt">指定的 salt</param>
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/// <param name="ht">hash 算法类型</param>
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/// <returns></returns>
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public virtual String GetBySalt( String pwd, String salt, HashType ht ) {
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return Get( pwd + salt, ht );
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}
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/// <summary>
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/// 获取随机密码(由英文字母和数字构成)
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/// </summary>
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/// <param name="passwordLength">密码长度</param>
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/// <returns></returns>
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public virtual String GetRandomPassword( int passwordLength ) {
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return GetRandomPassword( passwordLength, true );
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}
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/// <summary>
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/// 获取随机密码(由英文字母和数字构成)
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/// </summary>
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/// <param name="passwordLength">密码长度</param>
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/// <param name="isLower">结果是否小写</param>
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/// <returns></returns>
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public virtual String GetRandomPassword( int passwordLength, Boolean isLower ) {
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String charList = isLower ? "abcdefghijklmnopqrstuvwxyz0123456789" : "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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byte[] buffer = new byte[passwordLength];
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RNGCryptoServiceProvider.Create().GetBytes( buffer );
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char[] chars = new char[passwordLength];
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int charCount = charList.Length;
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for (int i = 0; i < passwordLength; i++) {
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chars[i] = charList[(int)buffer[i] % charCount];
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}
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return new string( chars );
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}
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/// <summary>
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/// 根据指定长度获取salt
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/// </summary>
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/// <param name="size">salt的长度</param>
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/// <returns></returns>
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public virtual String GetSalt( int size ) {
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byte[] buffer = new byte[size];
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RNGCryptoServiceProvider.Create().GetBytes( buffer );
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return BitConverter.ToString( buffer ).Replace( "-", "" );
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}
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}
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}
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