public static String passwd(string srtPass ,UInt16 Key)
{
char[] Str = new char[srtPass.Length];
char[] cc = srtPass.ToCharArray();
UInt32 t; for (int i = 0; i < srtPass.Length; i++)
{
Str[i] = Convert.ToChar(Convert.ToByte(cc[i]) ^ (Key >> 8));
t = Convert.ToUInt32(Convert.ToByte(Str[i]) + Key);
Key = Convert.ToUInt16(t);
}
string retStr = new string(Str);
return retStr;
}
调用后
Label1.Text = “111111";
UInt16 key = 0520;
string str = passwd(Label1.Text.ToString(), key);
Label2.Text = str;
string str2 = passwd(Label2.Text.ToString(), key);
Label3.Text = str2;当加密字符是111111 加密后是333332
解密出来时111110其他有部分是正常的
请各位大哥想想办法吧解密 还原加密前的字符
{
Str[i] = Convert.ToChar(Convert.ToByte(cc[i]) ^ (Key >> 8));
t = Convert.ToUInt32(Convert.ToByte(Str[i]) + Key);
Key = Convert.ToUInt16(t);
}key右移8位,也就是吧后面8位截掉,前5次循环结果都是10,第6次循环是11
这算哪门子加密啊,还有加密解密怎么一个方法啊
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/// <summary>
/// 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 Encrypt(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>
/// 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 Decrypt(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;
}
}
public string Encrypt(string strData,long lKey)
{
string strRtn="";
byte[] bData = System.Text.Encoding.Unicode.GetBytes(strData);
char[] cData = System.Text.Encoding.Unicode.GetChars(bData); for(int i=0;i<cData.Length;i++)
{
strRtn+=(char)Encode((long)cData[i],lKey);
}
return strRtn;
} public string Decrypt(string strData,long lKey)
{
string strRtn="";
byte[] bData = System.Text.Encoding.Unicode.GetBytes(strData);
char[] cData = System.Text.Encoding.Unicode.GetChars(bData);
for(int i=0;i<cData.Length;i++)
{
strRtn+=(char)Decode((long)cData[i],lKey);
}
return strRtn;
}
{
char[] Str = new char[srtPass.Length];
char[] cc = srtPass.ToCharArray();
UInt32 t; for (int i = 0; i < srtPass.Length; i++)
{
Str[i] = Convert.ToChar(Convert.ToByte(cc[i]) ^ (Key >> 8));
t = Convert.ToUInt32(Convert.ToByte(Str[i]) + Key);
Key = Convert.ToUInt16(t);
}
string retStr = new string(Str);
return retStr;
}
关键加密必须用这个 所以现在我的目的是写一个这个的解密就OK了
{
char[] Str = new char[srtPass.Length];
char[] cc = srtPass.ToCharArray();
UInt32 t; for (int i = 0; i < srtPass.Length; i++)
{
Str[i] = Convert.ToChar(Convert.ToByte(cc[i]) ^ (Key >> 8));
t = Convert.ToUInt32(Convert.ToByte(Str[i]) + Key);
Key = Convert.ToUInt16(t);
}
string retStr = new string(Str);
StringAndKey sk = new StringAndKey(retStr, Key);
return sk;
}
public static StringAndKey passwdReverse(string srtPass, UInt16 Key)
{
char[] Str = new char[srtPass.Length];
char[] cc = srtPass.ToCharArray();
Array.Reverse(cc);
UInt32 t; for (int i = 0; i < srtPass.Length; i++)
{
Key = Convert.ToUInt16(Key - Convert.ToByte(cc[i]));
Str[i] = Convert.ToChar(Convert.ToByte(cc[i]) ^ (Key >> 8));
//t = Convert.ToUInt32(Convert.ToByte(Str[i]) + Key);
//Key = Convert.ToUInt16(t);
}
Array.Reverse(Str);
string retStr = new string(Str); StringAndKey sk = new StringAndKey(retStr, Key);
return sk;
} public class StringAndKey
{
public string str = "";
public UInt16 k = 0; public StringAndKey(string st, UInt16 n)
{
str = st;
k = n;
}
}搞出来了,看看吧,解密码要加密码最后的值,所以要返回
定义这个类的理由是什么?? public class StringAndKey
{
public string str = "";
public UInt16 k = 0; public StringAndKey(string st, UInt16 n)
{
str = st;
k = n;
}
}
执行这段语句的时候报错+ $exception {"值对于 UInt16 太大或太小。"} System.Exception {System.OverflowException}