/// <summary>
/// 利用MD5对字符串进行加密
/// </summary>
/// <param name="someStr">待加密的字符串</param>
/// <returns>返回加密后的字符串</returns>
public static string EncryptMD5(string encryptStr)
{
MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
UTF8Encoding Encode = new UTF8Encoding();
byte[] HashedBytes = md5Hasher.ComputeHash(Encode.GetBytes(encryptStr));
return Encode.GetString(HashedBytes);
}
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptStr">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 encryptStr,string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0,8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptStr);
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 encryptStr;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptStr">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 decryptStr,string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptStr);
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 decryptStr;
}
}
/// <summary>
/// DES加密文件
/// </summary>
/// <param name="inFilePath">待加密文件</param>
/// <param name="outFilePath">加密后的文件</param>
/// <param name="encryptKey">加密密钥</param>
/// <returns></returns>
public static bool EncryptDES(string inFilePath,string outFilePath,string encryptKey)
{
byte[] rgbIV= Keys;
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0,8));
//读入的流
FileStream inFs = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
//待写的流
FileStream outFs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
outFs.SetLength(0);
//创建一个变量来帮助读写
byte[] byteIn = new byte[100]; //临时存放读入的流
long readLen = 0; //读入流的长度
long totalLen = inFs.Length; //总共读入流的长度
int everyLen; //每次读入流动长度
//读入InFs，加密后写入OutFs
DES des = new DESCryptoServiceProvider();
CryptoStream encStream = new CryptoStream(outFs, des.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
while(readLen < totalLen)
{
everyLen = inFs.Read(byteIn, 0, 100);
encStream.Write(byteIn, 0, everyLen);
readLen = readLen + everyLen;
}
encStream.Close();
outFs.Close();
inFs.Close();
return true;//加密成功
}
catch
{
return false;//加密失败
}
}
/// <summary>
/// DES解密文件
/// </summary>
/// <param name="inFilePath">待解密文件</param>
/// <param name="outFilePath">待加密文件</param>
/// <param name="decryptKey">解密密钥</param>
/// <returns></returns>
public static bool DecryptDES(string inFilePath,string outFilePath,string decryptKey)
{
byte[] rgbIV= Keys;
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0,8));
//读入的流
FileStream inFs = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
//待写的流
FileStream outFs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
outFs.SetLength(0);
//创建一个变量来帮助读写
byte[] byteIn = new byte[100]; //临时存放读入的流
long readLen = 0; //读入流的长度
long totalLen = inFs.Length; //总共读入流的长度
int everyLen; //每次读入流动长度
//读入InFs，解密后写入OutFs
DES des = new DESCryptoServiceProvider();
CryptoStream encStream = new CryptoStream(outFs, des.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
while(readLen < totalLen)
{
everyLen = inFs.Read(byteIn, 0, 100);
encStream.Write(byteIn, 0, everyLen);
readLen = readLen + everyLen;
}
encStream.Close();
outFs.Close();
inFs.Close();
return true;//解密成功
}
catch
{
return false;//解密失败
}
}
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