这里写自定义目录标题
数据加密
数据加密分为可逆和不可逆的。
可逆加密
//默认密钥向量
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
private static string DESKey = "CQYRZHXG";
/// <summary>
/// <summary>
/// 加密【可逆】
/// </summary>
/// <param name="Text">需要加密的字符串</param>
/// <returns></returns>
public static string Encrypt(string Text)
{
return EncryptDES(Text, DESKey);
}
/// <summary>
/// 加密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="Text">需要解密的字符串</param>
/// <returns></returns>
public static string Decrypt(string Text)
{
if (!string.IsNullOrEmpty(Text))
{
return DecryptDES(Text, DESKey);
}
else
{
return "";
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
/// <summary>
/// Base64加密，采用utf8编码方式加密
/// </summary>
/// <param name="source">待加密的明文</param>
/// <returns>加密后的字符串</returns>
public static string Base64Encode(string source)
{
return Base64Encode(Encoding.UTF8, source);
}
/// <summary>
/// Base64加密
/// </summary>
/// <param name="encodeType">加密采用的编码方式</param>
/// <param name="source">待加密的明文</param>
/// <returns></returns>
public static string Base64Encode(Encoding encodeType, string source)
{
string encode = string.Empty;
byte[] bytes = encodeType.GetBytes(source);
try
{
encode = Convert.ToBase64String(bytes);
}
catch
{
encode = source;
}
return encode;
}
/// <summary>
/// Base64解密，采用utf8编码方式解密
/// </summary>
/// <param name="result">待解密的密文</param>
/// <returns>解密后的字符串</returns>
public static string Base64Decode(string result)
{
return Base64Decode(Encoding.UTF8, result);
}
/// <summary>
/// Base64解密
/// </summary>
/// <param name="encodeType">解密采用的编码方式，注意和加密时采用的方式一致</param>
/// <param name="result">待解密的密文</param>
/// <returns>解密后的字符串</returns>
public static string Base64Decode(Encoding encodeType, string result)
{
string decode = string.Empty;
byte[] bytes = Convert.FromBase64String(result);
try
{
decode = encodeType.GetString(bytes);
}
catch
{
decode = result;
}
return decode;
}
注意：加密后的字符串可能包含‘/’或‘+’等特殊字符，所以若前端拿到后需要再次传入后台，那就需要转码【
例如：
某个请求返回加密后的数据，加密后返回的字符串为“2jsd9sdje+jxidnwmi/6==” 若直接将再次它传回台进行解密时，后台接收到的将会是“2jsd9sdje jxidnwmi/6==”，会将’+‘转为空格。所以需要进行转码：encodeURIComponent（“2jsd9sdje+jxidnwmi/6==”）这样后台接收到的就是原来的加密后的字符串了
】
不可逆加密
/// <summary>
/// 用户密码加密【不可逆】
/// </summary>
/// <param name="userPwd">用户密码</param>
/// <returns></returns>
public string UserPwdEncrypt(string userPwd)
{
if (string.IsNullOrEmpty(userPwd)) userPwd = "";
MD5 md5Hash = MD5.Create();
byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(userPwd));
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}
// Return the hexadecimal string.
return sBuilder.ToString();
}
