public void PrivateEncryption_Load_Key_Test()
{
Random rnd = new Random();
byte[] data = new byte[196];
rnd.NextBytes(data);
byte[] encData;
using (RSACryptoServiceProvider privateRsa = new RSACryptoServiceProvider())
{
string privateKey =
"<RSAKeyValue><Modulus>vKzm/rFi2jPG6fumvhDWeZ49ZZhUh5EEXWW5fs1Y5iFW2poGA9I2sdeBBVgE16DshQY+VdW+e4uaXZJncuy+MdHoe9HWGx6iAVB3PSFUGNhaMQnX+bv+GWORBoFMBpx2ZGUqOSbazIxBpTxyg0DnXdpeFbVrWONq/A7RsmLWHZKk1cdoJ15YPI85IPFO3YwsfBDCYMHaaVcy7Ac9UvJGasopzfQq7dPM8d0xj93VUPq8La4psejJ/N56IYjs/+rvoFvACbt8U+a9UMWjNVbnBm4+MjcxASbxLkd3izRmZ5Jtv8YRoHOKkxlgG8vVVcNPNONoMNdE+YmxeZh7pH1w0Q==</Modulus><Exponent>AQAB</Exponent><P>3Wj62DgD6UFsoOxlgr7FpDM7Ev3/K4IfdHUkznGpVXWALawFMNMLmMIvp1NwFJ9U05+6IA3xnoq0Ue7mrJZ4HPqb7qwrJ9hG5gpXZzyMVUvcblJxchzet6N5fb3yMDX3A6zwfrsnaYucHVWmdf/MhWtkM/jQQN+Z1kAxkB+NTz0=</P><Q>2ia9ZGUKmw8Jsn0Ew13OkYzyjyw6E5ffwEDafpwJ8AojoKnFI1b4NSkYt3oAQbamLTyupoxL+3DQ7d7TeMoQqunM/tWOukZo3rAyaa/KRoNIcbDNLTdtzpdxgfZmZh6WrEHNkDx5y/UGqb/ceVlKeDCSQvE+sTuagbxCPoLkwSU=</Q><DP>xjGYAf66eY1oGPEjuRLeRqrZYZneVesIDy5hgS87flVNJRUMHHV+twJ0t9q3xK4Pt9QOP21b8SiGW6V39dxHruEivlZ91xAB/yAYtz/6+suKiXLhPF3dfBMoyMdESaW09SRUr40GrbMcTyIBfTU6td+49dDvUnMV+TTDaRjlXJ0=</DP><DQ>DJDUsfa8AKiCF3zqDFLX9jxXMHYMtlo2Mj3KGCbmz6PV34hH6bw1ueIvIUpuv1pFAjAPo1pLeiVKc5k1Nyz0ftPO0hL9EK/DlKgzjzDoBt3DC4FyoBskQRUqHaFSzqkOZse3jopdPalUg+ygR4EkL/4kPqTkxpK3WKe+bRlfEd0=</DQ><InverseQ>gSF7iEokHbW9m4IgZa3HL0fDcLAQUK6JO4uq/RM5/VgHtNR785OLU3pQjqHGgu2SmtwitNf+R8TKHkz8/777qKk3MUb9SRAApKFomSPQXU8Iu3m/WJuYCfFq+MeNCyNQ+UNsD7qqI6Xie/wsExMOa8+HP7VsxhOX7btVqErz5+0=</InverseQ><D>nW70zJ79ai98Ei/O4ZexLwgQGR7zoa8q4jgIgTsdq+Ez1PJihHu68chtuyTH3ZlE4nbkOsFA0VwasWuBcI8E4RNTF0Zvjm+QJOKcrGCMCLM3BuY81gC8tTi0gaYP5xBVZc5YXhoCxl1eRV9b+hOFO3YDvb+E1EXnNm2zIlOAcGlG44ezABU+MypPPEWr00DVG9AYSAjS93DoCPO01EMPJCf8eRcIQpnjJf22o0+0fgI3rkfkuJI6W1W16sqHHYJMv3KNo7kakL7OzKUcAZgCKx7IPQ9ilsYmKe0Ffj4qsEPrk2lIts/S9rYJWAoqBh1PdPh5F2P+adDz/A1HY4ZUsQ==</D></RSAKeyValue>";
privateRsa.FromXmlString(privateKey);
encData = privateRsa.PrivareEncryption(data);
}
byte[] decipher;
using (RSACryptoServiceProvider publicRsa = new RSACryptoServiceProvider())
{
string publicKey =
"<RSAKeyValue><Modulus>vKzm/rFi2jPG6fumvhDWeZ49ZZhUh5EEXWW5fs1Y5iFW2poGA9I2sdeBBVgE16DshQY+VdW+e4uaXZJncuy+MdHoe9HWGx6iAVB3PSFUGNhaMQnX+bv+GWORBoFMBpx2ZGUqOSbazIxBpTxyg0DnXdpeFbVrWONq/A7RsmLWHZKk1cdoJ15YPI85IPFO3YwsfBDCYMHaaVcy7Ac9UvJGasopzfQq7dPM8d0xj93VUPq8La4psejJ/N56IYjs/+rvoFvACbt8U+a9UMWjNVbnBm4+MjcxASbxLkd3izRmZ5Jtv8YRoHOKkxlgG8vVVcNPNONoMNdE+YmxeZh7pH1w0Q==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
publicRsa.FromXmlString(publicKey);
decipher = publicRsa.PublicDecryption(encData);
}
Assert.IsTrue(decipher.SequenceEqual(data));
}
public void PrivareEncryptionTest()
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(1024);
Random rnd = new Random();
byte[] data;
for (int i = 0; i < 200; i++)
{
data = new byte[rnd.Next(16, 123)];
rnd.NextBytes(data); // Random content
// Private encrypt this data
byte[] cipher = rsa.PrivareEncryption(data);
// And decrypt it back
byte[] decipher = rsa.PublicDecryption(cipher);
Assert.AreEqual(data.Length, decipher.Length, "Round: {0}, data: {1}, decipher: {2}",
i, ShowBytesValue(data), ShowBytesValue(decipher));
Assert.IsTrue(data.SequenceEqual(decipher), "Round: {0} data: {1} decipher: {2}",
i, ShowBytesValue(data), ShowBytesValue(decipher));
}
}
public void RSACryptoServiceProvider_Usage()
{
string secret = "My secret message";
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(512); // Key bits length
/*
* Skip the loading part for the RSACryptoServiceProvider will generate
* random Private / Public keys pair, that you can save later with
* rsa.ToXmlString(true);
*
string key = "private or public key as xml string";
rsa.FromXmlString(key);
*/
// Convert the string to byte array
byte[] secretData = Encoding.UTF8.GetBytes(secret);
// Encrypt it using the private key:
byte[] encrypted = rsa.PrivareEncryption(secretData);
// Decrypt it using the public key
byte[] decrypted = rsa.PublicDecryption(encrypted);
string decString = Encoding.UTF8.GetString(decrypted); // And back to string
Assert.AreEqual("My secret message", decString);
}