public string EncryptData(string msg)
{
if (Init())
{
if (_type == 1)
{
SHA256 sha256Hash = SHA256.Create();
byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(msg));
var rsa = RSA.Create();
rsa.KeySize = 1024;
rsa.ImportRSAPrivateKey(Convert.FromBase64String(_privateKey), out int byteReads);
var signed = rsa.SignData(bytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
string result = Convert.ToBase64String(signed);
return(result);
}
else
{
PGPLib pgp = new PGPLib();
var signed = pgp.SignString(msg, new FileInfo(_privateKey), _pgpKeyPassword);
return(signed);
}
}
else
{
return(null);
}
}
public String encrypet(string InputText, string path, int ID)
{
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
Studnets loginStudent = new Studnets();
DataRow loginS = loginStudent.drSearchStudentEmail(ID);
string password = null;
if (loginS != null)
{
password = loginS["Password"].ToString();
}
String signedString = "";
try
{
signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
}
catch
{
return("false");
}
return(signedString);
}
public string EncryptData(string msg, string code = "")
{
if (Init())
{
if (_type == 1)
{
//SHA256 sha256Hash = SHA256.Create();
// byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(msg));
//var key = Encoding.UTF8.GetBytes(code);
//HMACMD5 hmac = new HMACMD5(key);
// Convert the input string to a byte array and compute the hash.
//byte[] bytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(msg));
var rsa = RSA.Create();
rsa.KeySize = _keySize;
rsa.ImportRSAPrivateKey(Convert.FromBase64String(_privateKey), out int byteReads);
var r = rsa.SignData(Encoding.UTF8.GetBytes(msg), HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
//string result = Convert.ToBase64String(r);
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < r.Length; i++)
{
sBuilder.Append(r[i].ToString("x2"));
}
return(sBuilder.ToString());
}
else
{
PGPLib pgp = new PGPLib();
byte[] bytes = Encoding.UTF8.GetBytes(_privateKey);
var stream = new MemoryStream(bytes);
var signed = pgp.SignString(msg, stream, _pgpKeyPassword);
// Xử lý chuỗi lấy ra base64 string
var split = signed.Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries);
string result = string.Join("", split.Skip(2).Take(split.Length - 3));
//
return(result);
}
}
else
{
return(null);
}
}
public String encrypet(string InputText, string path, string password)
{
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
String signedString = "";
try
{
signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
}
catch
{
return("false");
}
return(signedString);
}
public String encrypet(string InputText, string path)
{
int ID = Convert.ToInt32(Session["ID"].ToString());
String plainString = InputText;
// create an instance of the library
PGPLib pgp = new PGPLib();
Studnets loginStudent = new Studnets();
DataRow loginS = loginStudent.drSearchStudentEmail(ID);
string password = null;
if (loginS != null)
{
password = loginS["Password"].ToString();
}
String signedString = pgp.SignString(plainString,
new FileInfo(path),
password);
return(signedString);
}
