我在做DES解密的时候,遇到了这个问题“未能找到任何可识别的数字”,请高手指教!
/// <summary>
/// 解密原函数
/// </summary>
/// <param name="pToDecrypt">解密字符串</param>
/// <param name="sKey">解密密钥</param>
/// <returns>字符串</returns>
public static string DesDecrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); //这句报错
inputByteArray[x] = (byte)i; //这句报错
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
其中
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); //这句报错
inputByteArray[x] = (byte)i; //这句报错数值转换方面的问题
/// <summary>
/// 解密原函数
/// </summary>
/// <param name="pToDecrypt">解密字符串</param>
/// <param name="sKey">解密密钥</param>
/// <returns>字符串</returns>
public static string DesDecrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); //这句报错
inputByteArray[x] = (byte)i; //这句报错
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
其中
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); //这句报错
inputByteArray[x] = (byte)i; //这句报错数值转换方面的问题
你最好调试下看看传过来的数据
byte n = Convert.ToByte("xx",16);
来测试,结果报了相同的错误,请问是怎么回事?