/// <summary>
/// RSA encryption
/// SHA256 hash algorithm to use the key length of at least 2048
/// </summary>
/// <param name="dataEncoding">Data Encoding</param>
/// <param name="keySize">Key length in bits</param>
/// <param name="privateKey">Private Key</param>
/// <param name="publicKey">Public Key</param>
public RsaXmlUtil(Encoding dataEncoding, string publicKey, string privateKey = null, int keySize = 2048)
{
if (string.IsNullOrEmpty(privateKey) && string.IsNullOrEmpty(publicKey))
{
throw new ArgumentException("Public and private keys must not be empty at the same time");
}
else
{
RSAParameters pubRsap;
if (!string.IsNullOrEmpty(privateKey))
{
PrivateRsa = RSA.Create();
PrivateRsa.KeySize = keySize;
RSAParameters priRsap = CreateRsapFromPrivateKey(privateKey);
PrivateRsa.ImportParameters(priRsap);
if (string.IsNullOrEmpty(publicKey))
{
PublicRsa = RSA.Create();
PublicRsa.KeySize = keySize;
pubRsap = new RSAParameters
{
Modulus = priRsap.Modulus,
Exponent = priRsap.Exponent
};
PublicRsa.ImportParameters(pubRsap);
}
}
if (!string.IsNullOrEmpty(publicKey))
{
PublicRsa = RSA.Create();
pubRsap = CreateRsapFromPublicKey(publicKey);
PublicRsa.KeySize = keySize;
PublicRsa.ImportParameters(pubRsap);
}
}
DataEncoding = dataEncoding ?? Encoding.UTF8;
}
public RsaPkcs1Util(Encoding encoding, string publicKey, string privateKey = null, int keySize = 2048)
{
if (string.IsNullOrEmpty(privateKey) && string.IsNullOrEmpty(publicKey))
{
throw new Exception("Public and private keys must not be empty at the same time");
}
if (!string.IsNullOrEmpty(privateKey))
{
PrivateRsa = RSA.Create();
PrivateRsa.KeySize = keySize;
var priRsap = CreateRsapFromPrivateKey(privateKey);
PrivateRsa.ImportParameters(priRsap);
if (string.IsNullOrEmpty(publicKey))
{
PublicRsa = RSA.Create();
PublicRsa.KeySize = keySize;
var pubRasp = new RSAParameters
{
Modulus = priRsap.Modulus,
Exponent = priRsap.Exponent
};
PublicRsa.ImportParameters(pubRasp);
}
}
if (!string.IsNullOrEmpty(publicKey))
{
PublicRsa = RSA.Create();
PublicRsa.KeySize = keySize;
PublicRsa.ImportParameters(CreateRsapFromPublicKey(publicKey));
}
DataEncoding = encoding ?? Encoding.UTF8;
}