/// <summary>
/// 解密数据
/// </summary>
/// <param name="toDecryptText">待解密的文本</param>
/// <returns>解密的文本</returns>
public static string Decrypt(string toDecryptText)
{
UnicodeEncoding textConverter = new UnicodeEncoding();
byte[] fromEncrypt;
byte[] encrypted;
//Get a decryptor that uses the same key and IV as the encryptor.
ICryptoTransform decryptor = rc2CSP.CreateDecryptor(key, IV);
//encrypted = textConverter.GetBytes(toDecryptText);
encrypted = TextService.BufferFromHexStr(toDecryptText, false);
if (encrypted == null)
{
return(toDecryptText);
}
//Now decrypt the previously encrypted message using the decryptor
// obtained in the above step.
MemoryStream msDecrypt = new MemoryStream(encrypted);
CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
fromEncrypt = new byte[encrypted.Length];
try
{
//Read the data oGX of the crypto stream.
int count = csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the byte array back into a string.
return(textConverter.GetString(fromEncrypt, 0, count));
}
catch
{
return(toDecryptText);
}
}
/// <summary>
/// 加密数据
/// </summary>
/// <param name="toEncryptText">待加密的文本</param>
/// <returns>经过加密的文本</returns>
public static string Encrypt(string toEncryptText)
{
UnicodeEncoding textConverter = new UnicodeEncoding();
byte[] encrypted;
byte[] toEncrypt;
//Get an encryptor.
ICryptoTransform encryptor = rc2CSP.CreateEncryptor(key, IV);
//Encrypt the data.
MemoryStream msEncrypt = new MemoryStream();
CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
//Convert the data to a byte array.
toEncrypt = textConverter.GetBytes(toEncryptText);
//Write all data to the crypto stream and flush it.
csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
csEncrypt.FlushFinalBlock();
//Get encrypted array of bytes.
encrypted = msEncrypt.ToArray();
//return textConverter.GetString(encrypted);
return(TextService.BufferToHexStr(encrypted, 0, encrypted.Length));
}