小工具之-加密解密
加密解密程序;
先看界面:
目前实现了Base64,Des,AES
自动加密解密.
SecurityHelper.cs
using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;
namespace Lib4Net
{
public class SecurityHelper
{
#region Des 加/解密
private static string IV = "455DBA6B-1719-45dc-971B-750621FC04DD";
private static string KEY = "0E8B1C9A-B42C-42a7-A96B-6E67AF70B02F";
/// <summary>
/// DES解密
/// </summary>
/// <param name="encryptedValue">要解密的字符串</param>
/// <returns>解密后的字符串</returns>
public static string DecryptDES(string encryptedValue)
{
string s = KEY.Substring(0, 8);
string str2 = IV.Substring(0, 8);
SymmetricAlgorithm algorithm = new DESCryptoServiceProvider();
algorithm.Key = Encoding.ASCII.GetBytes(s);
algorithm.IV = Encoding.ASCII.GetBytes(str2);
ICryptoTransform transform = algorithm.CreateDecryptor();
byte[] buffer = Convert.FromBase64String(encryptedValue);
MemoryStream stream = new MemoryStream();
CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Write);
stream2.Write(buffer, 0, buffer.Length);
stream2.FlushFinalBlock();
stream2.Close();
return Encoding.UTF8.GetString(stream.ToArray());
}
/// <summary>
/// DES加密
/// </summary>
/// <param name="originalValue">需要加密的字符串</param>
/// <returns>加密后的字符串</returns>
public static string EncryptDES(string originalValue)
{
string s = KEY.Substring(0, 8);
string str2 = IV.Substring(0, 8);
SymmetricAlgorithm algorithm = new DESCryptoServiceProvider();
algorithm.Key = Encoding.ASCII.GetBytes(s);
algorithm.IV = Encoding.ASCII.GetBytes(str2);
ICryptoTransform transform = algorithm.CreateEncryptor();
byte[] bytes = Encoding.UTF8.GetBytes(originalValue);
MemoryStream stream = new MemoryStream();
CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Write);
stream2.Write(bytes, 0, bytes.Length);
stream2.FlushFinalBlock();
stream2.Close();
return Convert.ToBase64String(stream.ToArray());
}
/// <summary>
/// 解密
/// </summary>
/// <param name="str">要解密的字符串</param>
/// <returns></returns>
public static string DecodeDes(string str)
{
return DecodeDes(str, "wwwl.80.hk");
}
/// <summary>
/// 加密
/// </summary>
/// <param name="str">要加密的字符串</param>
/// <returns></returns>
public static string EncodeDes(string str)
{
return EncodeDes(str, "wwwl.80.hk");
}
/// <summary>
/// 加密 GB2312
/// </summary>
/// <param name="str">加密串</param>
/// <param name="key">Key</param>
/// <returns></returns>
public static string EncodeDes(string str, string key)
{
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);
MemoryStream stream = new MemoryStream();
CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
stream2.Write(bytes, 0, bytes.Length);
stream2.FlushFinalBlock();
StringBuilder builder = new StringBuilder();
foreach (byte num in stream.ToArray())
{
builder.AppendFormat("{0:X2}", num);
}
stream.Close();
return builder.ToString();
}
/// <summary>
/// 解密 GB2312
/// </summary>
/// <param name="str">Desc string</param>
/// <param name="key">Key ,必须为8位 </param>
/// <returns></returns>
public static string DecodeDes(string str, string key)
{
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
byte[] buffer = new byte[str.Length / 2];
for (int i = 0; i < (str.Length / 2); i++)
{
int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);
buffer[i] = (byte)num2;
}
MemoryStream stream = new MemoryStream();
CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
stream2.Write(buffer, 0, buffer.Length);
stream2.FlushFinalBlock();
stream.Close();
return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());
}
#endregion
#region 移位加/解密
/// <summary>
/// 字符串加密 进行位移操作
/// </summary>
/// <param name="Input">待加密数据</param>
/// <returns>加密后的数据</returns>
public static string EncryptShift(string Input)
{
string _temp = "";
int _inttemp;
char[] _chartemp = Input.ToCharArray();
for (int i = 0; i < _chartemp.Length; i++)
{
_inttemp = _chartemp[i] + 1;
_chartemp[i] = (char)_inttemp;
_temp += _chartemp[i];
}
return _temp;
}
/// <summary>
/// 字符串解密 位移操作后的
/// </summary>
/// <param name="Input">待解密数据</param>
/// <returns>解密成功后的数据</returns>
public static string DecryptShift(string Input)
{
string _temp = "";
int _inttemp;
char[] _chartemp = Input.ToCharArray();
for (int i = 0; i < _chartemp.Length; i++)
{
_inttemp = _chartemp[i] - 1;
_chartemp[i] = (char)_inttemp;
_temp += _chartemp[i];
}
return _temp;
}
#endregion
#region AES加密/解密
/// <summary>
/// AES加密
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <returns>加密后的字符串</returns>
public static string EncryptAES(string encryptString)
{
return EncryptAES(encryptString, "wwwl.80.hk");
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <returns>解密后的字符串</returns>
public static string DecryptAES(string decryptString)
{
return DecryptAES(decryptString, "wwwl.80.hk");
}
//默认密钥向量
private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };
/// <summary>
/// AES加密
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥</param>
/// <returns>加密后的字符串</returns>
public static string EncryptAES(string encryptString, string encryptKey)
{
encryptKey = GetSubString(encryptKey, 0, 32, "");
encryptKey = encryptKey.PadRight(32, ' ');
RijndaelManaged rijndaelProvider = new RijndaelManaged();
rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
rijndaelProvider.IV = Keys;
ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();
byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);
return Convert.ToBase64String(encryptedData);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥</param>
/// <returns>解密后的字符串</returns>
public static string DecryptAES(string decryptString, string decryptKey)
{
decryptKey = GetSubString(decryptKey, 0, 32, "");
decryptKey = decryptKey.PadRight(32, ' ');
RijndaelManaged rijndaelProvider = new RijndaelManaged();
rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
rijndaelProvider.IV = Keys;
ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();
byte[] inputData = Convert.FromBase64String(decryptString);
byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);
return Encoding.UTF8.GetString(decryptedData);
}
/// <summary>
/// 取指定长度的字符串
/// </summary>
/// <param name="p_SrcString">要检查的字符串</param>
/// <param name="p_StartIndex">起始位置</param>
/// <param name="p_Length">指定长度</param>
/// <param name="p_TailString">用于替换的字符串</param>
/// <returns>截取后的字符串</returns>
private static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString)
{
string myResult = p_SrcString;
Byte[] bComments = Encoding.UTF8.GetBytes(p_SrcString);
foreach (char c in Encoding.UTF8.GetChars(bComments))
{ //当是日文或韩文时(注:中文的范围:\u4e00 - \u9fa5, 日文在\u0800 - \u4e00, 韩文为\xAC00-\xD7A3)
if ((c > '\u0800' && c < '\u4e00') || (c > '\xAC00' && c < '\xD7A3'))
{
//if (System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\u0800-\u4e00]+") || System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\xAC00-\xD7A3]+"))
//当截取的起始位置超出字段串长度时
if (p_StartIndex >= p_SrcString.Length)
return "";
else
return p_SrcString.Substring(p_StartIndex,
((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length);
}
}
if (p_Length >= 0)
{
byte[] bsSrcString = Encoding.Default.GetBytes(p_SrcString);
//当字符串长度大于起始位置
if (bsSrcString.Length > p_StartIndex)
{
int p_EndIndex = bsSrcString.Length;
//当要截取的长度在字符串的有效长度范围内
if (bsSrcString.Length > (p_StartIndex + p_Length))
{
p_EndIndex = p_Length + p_StartIndex;
}
else
{ //当不在有效范围内时,只取到字符串的结尾
p_Length = bsSrcString.Length - p_StartIndex;
p_TailString = "";
}
int nRealLength = p_Length;
int[] anResultFlag = new int[p_Length];
byte[] bsResult = null;
int nFlag = 0;
for (int i = p_StartIndex; i < p_EndIndex; i++)
{
if (bsSrcString[i] > 127)
{
nFlag++;
if (nFlag == 3)
nFlag = 1;
}
else
nFlag = 0;
anResultFlag[i] = nFlag;
}
if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_Length - 1] == 1))
nRealLength = p_Length + 1;
bsResult = new byte[nRealLength];
Array.Copy(bsSrcString, p_StartIndex, bsResult, 0, nRealLength);
myResult = Encoding.Default.GetString(bsResult);
myResult = myResult + p_TailString;
}
}
return myResult;
}
#endregion
}
}
StringHelper.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Encrypt
{
public class StringHelper
{
/// <summary>
/// Encode string under base64
/// </summary>
/// <param name="input">string</param>
/// <returns>base64</returns>
public static string EncodeBase64String(string input)
{
byte[] encbuff = Encoding.UTF8.GetBytes(input);
return Convert.ToBase64String(encbuff);
}
/// <summary>
/// Decode string under base64
/// </summary>
/// <param name="input">string</param>
/// <returns>resource</returns>
public static string DecodeBase64String(string input)
{
byte[] decbuff = Convert.FromBase64String(input);
return Encoding.UTF8.GetString(decbuff);
}
}
}
调用代码:
private string cryptAES(string input)
{
try
{
string tmp = SecurityHelper.DecryptAES(input);
return tmp;
}
catch
{
return SecurityHelper.EncryptAES(input);
throw;
}
}
private string cryptDes(string input)
{
try
{
string tmp = SecurityHelper.DecryptDES(input);
return tmp;
}
catch
{
return SecurityHelper.EncryptDES(input);
throw;
}
}
private string cryptBase64(string input)
{
try
{
string tmp = StringHelper.DecodeBase64String(input);
return tmp;
}
catch
{
return StringHelper.EncodeBase64String(input);
throw;
}
}
{
try
{
string tmp = SecurityHelper.DecryptAES(input);
return tmp;
}
catch
{
return SecurityHelper.EncryptAES(input);
throw;
}
}
private string cryptDes(string input)
{
try
{
string tmp = SecurityHelper.DecryptDES(input);
return tmp;
}
catch
{
return SecurityHelper.EncryptDES(input);
throw;
}
}
private string cryptBase64(string input)
{
try
{
string tmp = StringHelper.DecodeBase64String(input);
return tmp;
}
catch
{
return StringHelper.EncodeBase64String(input);
throw;
}
}
附源码下载地址:点此下载
