public sealed class RijndaelEncDec
{
/// <summary>
/// 初始化加密的key
/// </summary>
public static string Password
{
get;set;
}
private static byte[] Encrypt(byte[] clearData, byte[] Key, byte[] IV)
{
MemoryStream ms = new MemoryStream();
Rijndael alg = Rijndael.Create();
alg.Key = Key;
alg.IV = IV;
CryptoStream cs = new CryptoStream(ms,
alg.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(clearData, 0, clearData.Length);
cs.Close();
byte[] encryptedData = ms.ToArray();
return encryptedData;
}
/// <summary>
/// 返回通过key加密后的字符串
/// </summary>
/// <param name="clearText"></param>
/// <returns></returns>
public static string Encrypt(string clearText)
{
return Encrypt(clearText, Password);
}
private static string Encrypt(string clearText, string password)
{
byte[] clearBytes =
System.Text.Encoding.Unicode.GetBytes(clearText);
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
byte[] encryptedData = Encrypt(clearBytes,
pdb.GetBytes(32), pdb.GetBytes(16));
return Convert.ToBase64String(encryptedData);
}
private static byte[] Encrypt(byte[] clearData)
{
return Encrypt(clearData, Password);
}
private static byte[] Encrypt(byte[] clearData, string password)
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
return Encrypt(clearData, pdb.GetBytes(32), pdb.GetBytes(16));
}
/// <summary>
/// 导出加密后的文件
/// </summary>
/// <param name="fileIn">需要加密的文本</param>
/// <param name="fileOut">加密后的文本</param>
/// <param name="foo">预留标记未做使用，默认传入true即可</param>
public static void Encrypt(string fileIn, string fileOut, bool foo)
{
Encrypt(fileIn, fileOut, Password);
}
private static void Encrypt(string fileIn, string fileOut, string password)
{
FileStream fsIn = new FileStream(fileIn,
FileMode.Open, FileAccess.Read);
FileStream fsOut = new FileStream(fileOut,
FileMode.OpenOrCreate, FileAccess.Write);
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
CryptoStream cs = new CryptoStream(fsOut,
alg.CreateEncryptor(), CryptoStreamMode.Write);
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
bytesRead = fsIn.Read(buffer, 0, bufferLen);
cs.Write(buffer, 0, bytesRead);
} while (bytesRead != 0);
cs.Close();
fsIn.Close();
}
private static byte[] Decrypt(byte[] cipherData,
byte[] Key, byte[] IV)
{
MemoryStream ms = new MemoryStream();
Rijndael alg = Rijndael.Create();
alg.Key = Key;
alg.IV = IV;
CryptoStream cs = new CryptoStream(ms,
alg.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(cipherData, 0, cipherData.Length);
cs.Close();
byte[] decryptedData = ms.ToArray();
return decryptedData;
}
/// <summary>
/// 返回通过key解密的原始字符串
/// </summary>
/// <param name="cipherText"></param>
/// <returns></returns>
public static string Decrypt(string cipherText)
{
return Decrypt(cipherText, Password);
}
private static string Decrypt(string cipherText, string password)
{
byte[] cipherBytes = Convert.FromBase64String(cipherText);
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65,
0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
byte[] decryptedData = Decrypt(cipherBytes,
pdb.GetBytes(32), pdb.GetBytes(16));
return System.Text.Encoding.Unicode.GetString(decryptedData);
}
private static byte[] Decrypt(byte[] cipherData, string password)
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
return Decrypt(cipherData, pdb.GetBytes(32), pdb.GetBytes(16));
}
/// <summary>
/// 返回解密后的文本
/// </summary>
/// <param name="fileIn"></param>
/// <param name="fileOut"></param>
/// <param name="foo">预留标记未做使用，默认传入true即可</param>
public static void Decrypt(string fileIn, string fileOut, bool foo)
{
Decrypt(fileIn, fileOut, Password);
}
private static void Decrypt(string fileIn, string fileOut, string password)
{
FileStream fsIn = new FileStream(fileIn,
FileMode.Open, FileAccess.Read);
FileStream fsOut = new FileStream(fileOut,
FileMode.OpenOrCreate, FileAccess.Write);
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password,
new byte[]
{
0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d,
0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
});
Rijndael alg = Rijndael.Create();
alg.Key = pdb.GetBytes(32);
alg.IV = pdb.GetBytes(16);
CryptoStream cs = new CryptoStream(fsOut,
alg.CreateDecryptor(), CryptoStreamMode.Write);
int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int bytesRead;
do
{
bytesRead = fsIn.Read(buffer, 0, bufferLen);
cs.Write(buffer, 0, bytesRead);
} while (bytesRead != 0);
cs.Close();
fsIn.Close();
}
}
