string m = ""; string s = "23847912858456"; for (int a = 0; a < s.Length; a++) { string temp = s.Substring(a, 1); int n = int.Parse(temp); m += ((n + 2) % 10).ToString(); } MessageBox.Show(m);
刚才忘记写解密了,补上 string m = ""; string s = "23847912858456";//这个替换上面的MessageBox.Show(m); for (int a = 0; a < s.Length; a++) { string temp = s.Substring(a, 1); int n = int.Parse(temp); m += ((n + 8) % 10).ToString(); } MessageBox.Show(m);[/code]
string s = "23847912858456";
for (int a = 0; a < s.Length; a++)
{
string temp = s.Substring(a, 1);
int n = int.Parse(temp);
m += ((n + 2) % 10).ToString();
} MessageBox.Show(m);
string s = "23847912858456";//这个替换上面的MessageBox.Show(m);
for (int a = 0; a < s.Length; a++)
{
string temp = s.Substring(a, 1);
int n = int.Parse(temp);
m += ((n + 8) % 10).ToString();
} MessageBox.Show(m);[/code]
/// <summary>
/// RSA 的密钥产生 产生私钥 和公钥
/// </summary>
/// <param name="xmlKeys"></param>
/// <param name="xmlPublicKey"></param>
public void RSAKey(out string xmlKeys,out string xmlPublicKey)
{
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
xmlKeys=rsa.ToXmlString(true);
xmlPublicKey = rsa.ToXmlString(false);
}
#endregion #region RSA的加密函数
//##############################################################################
//RSA 方式加密
//说明KEY必须是XML的行式,返回的是字符串
//在有一点需要说明!!该加密方式有 长度 限制的!!
//############################################################################## //RSA的加密函数 string
public string RSAEncrypt(string xmlPublicKey,string m_strEncryptString )
{
byte[] PlainTextBArray;
byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
PlainTextBArray = (new UnicodeEncoding()).GetBytes(m_strEncryptString);
CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;
}
//RSA的加密函数 byte[]
public string RSAEncrypt(string xmlPublicKey,byte[] EncryptString )
{
byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
CypherTextBArray = rsa.Encrypt(EncryptString, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;
}
#endregion #region RSA的解密函数
//RSA的解密函数 string
public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString )
{
byte[] PlainTextBArray;
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
PlainTextBArray =Convert.FromBase64String(m_strDecryptString);
DypherTextBArray=rsa.Decrypt(PlainTextBArray, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;
} //RSA的解密函数 byte
public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString )
{
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
DypherTextBArray=rsa.Decrypt(DecryptString, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;
}
#endregion #endregion