This post has reference to part one of this Article.
Inside our "Crypt" class, lets include two more methods.
public string EncryptData(string data2Encrypt)
{
ParameterSetup();
StreamReader reader = new StreamReader(publicPath);
string publicOnlyKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicOnlyKeyXML);
reader.Close();
//encrypt
byte[] plainbytes = System.Text.Encoding.UTF8.GetBytes(data2Encrypt);
byte[] cipherbytes = rsa.Encrypt(plainbytes, false);
return Convert.ToBase64String(cipherbytes);
}
public string DecryptData(string data2Decrypt)
{
ParameterSetup();
byte[] getpassword = Convert.FromBase64String(data2Decrypt);
StreamReader reader = new StreamReader(privatePath);
string publicPrivateKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicPrivateKeyXML);
reader.Close();
//decrypt
byte[] plain = rsa.Decrypt(getpassword, false);
return System.Text.Encoding.UTF8.GetString(plain);
}
{
ParameterSetup();
StreamReader reader = new StreamReader(publicPath);
string publicOnlyKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicOnlyKeyXML);
reader.Close();
//encrypt
byte[] plainbytes = System.Text.Encoding.UTF8.GetBytes(data2Encrypt);
byte[] cipherbytes = rsa.Encrypt(plainbytes, false);
return Convert.ToBase64String(cipherbytes);
}
public string DecryptData(string data2Decrypt)
{
ParameterSetup();
byte[] getpassword = Convert.FromBase64String(data2Decrypt);
StreamReader reader = new StreamReader(privatePath);
string publicPrivateKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicPrivateKeyXML);
reader.Close();
//decrypt
byte[] plain = rsa.Decrypt(getpassword, false);
return System.Text.Encoding.UTF8.GetString(plain);
}
Now from Aspx page you can use these methods as follows,
Crypt myCrypt = new Crypt();
myCrypt.updatePrivatePath(Server.MapPath("PrivateKey.xml"));
myCrypt.updatePublicPath(Server.MapPath("PublicKey.xml"));
myCrypt.GenerateKey();
myCrypt.updatePrivatePath(Server.MapPath("PrivateKey.xml"));
myCrypt.updatePublicPath(Server.MapPath("PublicKey.xml"));
myCrypt.GenerateKey();
string EncryptData = myCrypt.EncryptData("Your Name");
string DecryptData = myCrypt.DecryptData(EncryptData);
string DecryptData = myCrypt.DecryptData(EncryptData);
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