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/*
* 作用：字符串加密/解密，MD5，AES，DES，BASE64。
* */
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Helper.Core.Library
{
public class EncryptHelper
{
#region 对外公开方法
#region MD5
/// <summary>
/// MD5 加密
/// </summary>
/// <param name="data">需要加密的数据</param>
/// <returns></returns>
public static string MD5(string data)
{
byte[] buffer = System.Text.Encoding.Default.GetBytes(data);
MD5CryptoServiceProvider cryptoServiceProvider = new MD5CryptoServiceProvider();
byte[] hashValue = cryptoServiceProvider.ComputeHash(buffer);
StringBuilder stringBuilder = new StringBuilder();
foreach (byte byteData in hashValue)
{
if (byteData < 16)
{
stringBuilder.Append("0");
}
stringBuilder.Append(byteData.ToString("X"));
}
return stringBuilder.ToString().ToLower();
}
/// <summary>
/// MD5 加密
/// </summary>
/// <param name="data">需要加密的数据</param>
/// <param name="confuseData">混淆字符</param>
/// <param name="encryptTimes">加密次数</param>
/// <returns></returns>
public static string MD5(string data, string confuseData, int encryptTimes = 3)
{
string encryptData = data;
string encryptConfuseData = confuseData;
do
{
encryptTimes--;
encryptData = MD5(encryptData);
encryptConfuseData = MD5(encryptConfuseData);
} while (encryptTimes > 0);
encryptData = encryptData.Insert(0, encryptConfuseData.Substring(24));
encryptData = encryptData.Insert(32, encryptConfuseData.Substring(0, 8));
encryptData = encryptData.Insert(16, encryptConfuseData.Substring(8, 8));
encryptData = encryptData.Insert(32, encryptConfuseData.Substring(16, 8));
return encryptData;
}
#endregion
#region AES 加密/解密
/// <summary>
/// AES 加密
/// </summary>
/// <param name="data">需要加密的数据</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static string AESEncrypt(string data, string key)
{
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
RijndaelManaged rijndaelManaged = null;
try
{
byte[] plainBytes = Encoding.UTF8.GetBytes(data);
Byte[] byteKeys = new Byte[32];
Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(byteKeys.Length)), byteKeys, byteKeys.Length);
string result = null;
using (memoryStream = new MemoryStream())
{
rijndaelManaged = new RijndaelManaged();
rijndaelManaged.Mode = CipherMode.ECB;
rijndaelManaged.Padding = PaddingMode.PKCS7;
rijndaelManaged.KeySize = 128;
rijndaelManaged.Key = byteKeys;
using (cryptoStream = new CryptoStream(memoryStream, rijndaelManaged.CreateEncryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
}
result = Convert.ToBase64String(memoryStream.ToArray());
}
return result;
}
catch
{
throw;
}
finally
{
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (rijndaelManaged != null) rijndaelManaged.Clear();
}
}
/// <summary>
/// AES 加密
/// </summary>
/// <param name="data">需要加密的数据</param>
/// <param name="key">密钥</param>
/// <param name="vector">向量</param>
/// <returns></returns>
public static string AESEncrypt(string data, string key, string vector)
{
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
Rijndael rijndael = null;
try
{
Byte[] plainBytes = Encoding.UTF8.GetBytes(data);
Byte[] byteKeys = new Byte[32];
Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(byteKeys.Length)), byteKeys, byteKeys.Length);
Byte[] byteVectors = new Byte[16];
Array.Copy(Encoding.UTF8.GetBytes(vector.PadRight(byteVectors.Length)), byteVectors, byteVectors.Length);
Byte[] cryptograph = null;
rijndael = Rijndael.Create();
using (memoryStream = new MemoryStream())
{
using (cryptoStream = new CryptoStream(memoryStream, rijndael.CreateEncryptor(byteKeys, byteVectors), CryptoStreamMode.Write))
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
cryptograph = memoryStream.ToArray();
}
}
return Convert.ToBase64String(cryptograph);
}
catch
{
throw;
}
finally
{
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (rijndael != null) rijndael.Clear();
}
}
/// <summary>
/// AES 解密
/// </summary>
/// <param name="data">需要解密的数据</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static string AESDecrypt(string data, string key)
{
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
RijndaelManaged rijndaelManaged = null;
try
{
Byte[] encryptedBytes = Convert.FromBase64String(data);
Byte[] byteKeys = new Byte[32];
Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(byteKeys.Length)), byteKeys, byteKeys.Length);
string result = null;
using (memoryStream = new MemoryStream(encryptedBytes))
{
rijndaelManaged = new RijndaelManaged();
rijndaelManaged.Mode = CipherMode.ECB;
rijndaelManaged.Padding = PaddingMode.PKCS7;
rijndaelManaged.KeySize = 128;
rijndaelManaged.Key = byteKeys;
using (cryptoStream = new CryptoStream(memoryStream, rijndaelManaged.CreateDecryptor(), CryptoStreamMode.Read))
{
byte[] tmp = new byte[encryptedBytes.Length + 32];
int len = cryptoStream.Read(tmp, 0, encryptedBytes.Length + 32);
byte[] ret = new byte[len];
Array.Copy(tmp, 0, ret, 0, len);
result = Encoding.UTF8.GetString(ret);
}
}
return result;
}
catch
{
throw;
}
finally
{
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (rijndaelManaged != null) rijndaelManaged.Clear();
}
}
/// <summary>
/// AES 解密
/// </summary>
/// <param name="data">需要解密的数据</param>
/// <param name="key">密钥</param>
/// <param name="vector">向量</param>
/// <returns></returns>
public static string AESDecrypt(string data, string key, string vector)
{
MemoryStream memoryStream = null;
MemoryStream originalMemory = null;
CryptoStream cryptoStream = null;
Rijndael rijndael = null;
try
{
Byte[] encryptedBytes = Convert.FromBase64String(data);
Byte[] byteKeys = new Byte[32];
Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(byteKeys.Length)), byteKeys, byteKeys.Length);
Byte[] byteVectors = new Byte[16];
Array.Copy(Encoding.UTF8.GetBytes(vector.PadRight(byteVectors.Length)), byteVectors, byteVectors.Length);
Byte[] original = null;
rijndael = Rijndael.Create();
using (memoryStream = new MemoryStream(encryptedBytes))
{
using (cryptoStream = new CryptoStream(memoryStream, rijndael.CreateDecryptor(byteKeys, byteVectors), CryptoStreamMode.Read))
{
using (originalMemory = new MemoryStream())
{
Byte[] Buffer = new Byte[1024];
Int32 readBytes = 0;
while ((readBytes = cryptoStream.Read(Buffer, 0, Buffer.Length)) > 0)
{
originalMemory.Write(Buffer, 0, readBytes);
}
original = originalMemory.ToArray();
}
}
}
return Encoding.UTF8.GetString(original);
}
catch
{
throw;
}
finally
{
if (originalMemory != null) originalMemory.Close();
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (rijndael != null) rijndael.Clear();
}
}
#endregion
#region DES 加密/解密
/// <summary>
/// DES 加密
/// </summary>
/// <param name="data">需要加密的数据</param>
/// <param name="key">密钥（必须 8 位）</param>
/// <param name="vector">向量（必须 8 位）</param>
/// <returns></returns>
public static string DESEncrypt(string data, string key, string vector = null)
{
DESCryptoServiceProvider desCryptoService = null;
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
try
{
string result = null;
using(desCryptoService = new DESCryptoServiceProvider())
{
byte[] byteDataList = Encoding.UTF8.GetBytes(data);
desCryptoService.Key = ASCIIEncoding.ASCII.GetBytes(key);
if (string.IsNullOrEmpty(vector)) vector = key;
desCryptoService.IV = ASCIIEncoding.ASCII.GetBytes(vector);
using(memoryStream = new MemoryStream())
{
using(cryptoStream = new CryptoStream(memoryStream, desCryptoService.CreateEncryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(byteDataList, 0, byteDataList.Length);
cryptoStream.FlushFinalBlock();
}
result = Convert.ToBase64String(memoryStream.ToArray());
}
}
return result;
}
catch
{
throw;
}
finally
{
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (desCryptoService != null) desCryptoService.Clear();
}
}
/// <summary>
/// DES 解密
/// </summary>
/// <param name="data">需要解密的数据</param>
/// <param name="key">密钥（必须 8 位）</param>
/// <param name="vector">向量（必须 8 位）</param>
/// <returns></returns>
public static string DESDecrypt(string data, string key, string vector = null)
{
DESCryptoServiceProvider desCryptoService = null;
MemoryStream memoryStream = null;
CryptoStream cryptoStream = null;
try
{
string result = "";
byte[] byteDataList = Convert.FromBase64String(data);
using (desCryptoService = new DESCryptoServiceProvider())
{
desCryptoService.Key = ASCIIEncoding.ASCII.GetBytes(key);
if (string.IsNullOrEmpty(vector)) vector = key;
desCryptoService.IV = ASCIIEncoding.ASCII.GetBytes(vector);
using (memoryStream = new MemoryStream())
{
using (cryptoStream = new CryptoStream(memoryStream, desCryptoService.CreateDecryptor(), CryptoStreamMode.Write))
{
cryptoStream.Write(byteDataList, 0, byteDataList.Length);
cryptoStream.FlushFinalBlock();
}
result = Encoding.UTF8.GetString(memoryStream.ToArray());
}
}
return result;
}
catch
{
throw;
}
finally
{
if (cryptoStream != null) cryptoStream.Close();
if (memoryStream != null) memoryStream.Close();
if (desCryptoService != null) desCryptoService.Clear();
}
}
#endregion
#region Base64 加密/解密
/// <summary>
/// Base64 加密
/// </summary>
/// <param name="data">要加密的数据</param>
/// <returns></returns>
public static string Base64Encrypt(string data)
{
byte[] byteDataList = Encoding.UTF8.GetBytes(data);
return Convert.ToBase64String(byteDataList, 0, byteDataList.Length);
}
/// <summary>
/// Base64 解密
/// </summary>
/// <param name="data">要解密的数据</param>
/// <returns></returns>
public static string Base64Decrypt(string data)
{
byte[] byteDataList = Convert.FromBase64String(data);
return Encoding.UTF8.GetString(byteDataList);
}
#endregion
#endregion
}
}