如题,希望答题前您自己先测试是否通过,谢谢了
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{
byte[] contentBytes = System.Text.Encoding.Default.GetBytes(content);
byte[] keyBytes = System.Text.Encoding.Default.GetBytes(key); contentBytes = Xcode(contentBytes, keyBytes);
return Convert.ToBase64String(contentBytes);
} public static string Decode(string encodedContent, string key)
{
byte[] contentBytes = Convert.FromBase64String(encodedContent);
byte[] keyBytes = System.Text.Encoding.Default.GetBytes(key); contentBytes = Xcode(contentBytes, keyBytes);
return System.Text.Encoding.Default.GetString(contentBytes);
} private static byte[] Xcode(byte[] content, byte[] key)
{
for (int i = 0, l = content.Length; i < l; i++)
{
content[i] ^= key[i % key.Length];
}
return content;
}
base64太容易还原了,跟明文差不多。推荐用c#内嵌的AES加密
每次传递下一个片段前需要传递这个片段的大小(16进制) 然后发送这个长度的正文的二进制。这种情况下你可以加密后不用转换成base64。明天会公司帮你写写。
/// <summary>
/// 对称加密算法类
/// </summary>
public class SymmetricMethod
{ private SymmetricAlgorithm mobjCryptoService;
private string Key;
/// <summary>
/// 对称加密类的构造函数
/// </summary>
public SymmetricMethod()
{
mobjCryptoService = new RijndaelManaged();
Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
}
/// <summary>
/// 获得密钥
/// </summary>
/// <returns>密钥</returns>
private byte[] GetLegalKey()
{
string sTemp = Key;
mobjCryptoService.GenerateKey();
byte[] bytTemp = mobjCryptoService.Key;
int KeyLength = bytTemp.Length;
if (sTemp.Length > KeyLength)
{
sTemp = sTemp.Substring(0, KeyLength);
}
else if (sTemp.Length < KeyLength)
{
sTemp = sTemp.PadRight(KeyLength, ' ');
}
return ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 获得初始向量IV
/// </summary>
/// <returns>初试向量IV</returns>
private byte[] GetLegalIV()
{
string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
mobjCryptoService.GenerateIV();
byte[] bytTemp = mobjCryptoService.IV;
int IVLength = bytTemp.Length;
if (sTemp.Length > IVLength)
{
sTemp = sTemp.Substring(0, IVLength);
}
else if (sTemp.Length < IVLength)
{
sTemp = sTemp.PadRight(IVLength, ' ');
}
return ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 加密方法
/// </summary>
/// <param name="Source">待加密的串</param>
/// <returns>经过加密的串</returns>
public string Encrypto(string Source)
{
byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
MemoryStream ms = new MemoryStream();
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV = GetLegalIV();
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
ms.Close();
byte[] bytOut = ms.ToArray();
return Convert.ToBase64String(bytOut);
}
/// <summary>
/// 解密方法
/// </summary>
/// <param name="Source">待解密的串</param>
/// <returns>经过解密的串</returns>
public string Decrypto(string Source)
{
byte[] bytIn = Convert.FromBase64String(Source);
MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length);
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV = GetLegalIV();
ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cs);
return sr.ReadToEnd();
} }长度就不知道了~~已经过测试