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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Crypto
{
using System;
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;
public class Crypto
{
//---------------------------------------
//RSA
static public void GenerateKeys(ref string __publicPrivateKeyXML, ref string __publicOnlyKeyXML, ref string __sMessErr, int _ikeySize=1024)
{
try
{
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(_ikeySize);
//Pair of public and private key as XML string. Do not share this to other party
__publicPrivateKeyXML = RSA.ToXmlString(true);
//Private key in xml file, this string should be share to other parties
__publicOnlyKeyXML = RSA.ToXmlString(false);
}
catch (CryptographicException e)
{
__sMessErr = e.ToString();
}
}
static public string RSAEncrypt(string _sDataToEncrypt, string _sPublicKeyXML, ref string __sMessErr, int _ikeySize=1024, bool DoOAEPPadding=true)
{
try
{
byte[] dataToEncrypt = Encoding.UTF8.GetBytes(_sDataToEncrypt);
byte[] encryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(_ikeySize))
{
RSA.FromXmlString(_sPublicKeyXML);
//Encrypt the passed byte array and specify OAEP padding. OAEP padding is only available on Microsoft Windows XP or later.
encryptedData = RSA.Encrypt(dataToEncrypt, DoOAEPPadding);
}
return Convert.ToBase64String(encryptedData);
}
catch (CryptographicException e)
{
__sMessErr = e.ToString();
return null;
}
}
static public string RSADecrypt(string _sDataToDecryptBase64,string _sPrivateKeyXML, ref string __sMessErr, int _ikeySize=1024, bool DoOAEPPadding=true)
{
try
{
byte[] dataToDecrypt = Convert.FromBase64String(_sDataToDecryptBase64);
byte[] decryptedBytes;
string decryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(_ikeySize))
{
RSA.FromXmlString(_sPrivateKeyXML);
//Decrypt the passed byte array and specify OAEP padding. OAEP padding is only available on Microsoft Windows XP or later.
decryptedBytes = RSA.Decrypt(dataToDecrypt, DoOAEPPadding);
decryptedData = Encoding.UTF8.GetString(decryptedBytes);
}
return decryptedData;
}
catch (CryptographicException e)
{
__sMessErr = e.ToString();
return null;
}
}
//---------------------------------------
//Haschage
public static string GetMD5(string text)
{
return GetMD5(text, Encoding.Default);
}
public static string GetMD5(string text, Encoding enc)
{
return GetHash<MD5CryptoServiceProvider>(text, enc);
}
public static string GetSHA1(string text)
{
return GetSHA1(text, Encoding.Default);
}
public static string GetSHA1(string text, Encoding enc)
{
return GetHash<SHA1CryptoServiceProvider>(text, enc);
}
public static string GetSHA384(string text)
{
return GetSHA384(text, Encoding.Default);
}
public static string GetSHA384(string text, Encoding enc)
{
return GetHash<SHA384CryptoServiceProvider>(text, enc);
}
public static string GetSHA512(string text)
{
return GetSHA512(text, Encoding.Default);
}
public static string GetSHA512(string text, Encoding enc)
{
return GetHash<SHA512CryptoServiceProvider>(text, enc);
}
public static string GetSHA256(string text)
{
return GetSHA256(text, Encoding.Default);
}
public static string GetSHA256(string text, Encoding enc)
{
return GetHash<SHA256CryptoServiceProvider>(text, enc);
}
public static string GetHash<TP>(string text, Encoding enc)
where TP : HashAlgorithm, new()
{
var buffer = enc.GetBytes(text);
var provider = new TP();
return BitConverter.ToString(provider.ComputeHash(buffer)).Replace("-", "");
}
//---------------------------------------
//Encodage
public static Encoding GetEncoding(int codePage)
{
return Encoding.GetEncoding(codePage);
}
public static string UTF8Encode(string text)
{
return UTF8Encode(text,Encoding.Default);
}
public static string UTF8Encode(string text, Encoding enc)
{
byte[] textUTF8 = Encoding.Convert(enc,Encoding.UTF8,enc.GetBytes(text));
return enc.GetString(textUTF8);
}
public static string UnicodeEncode(string text)
{
return UnicodeEncode(text, Encoding.Default);
}
public static string UnicodeEncode(string text, Encoding enc)
{
byte[] textUnicode = Encoding.Convert(enc, Encoding.Unicode, enc.GetBytes(text));
return enc.GetString(textUnicode);
}
}
} |
