private RSACryptoServiceProvider importKey(string encodedKey)
{
byte[] keyBytes = Convert.FromBase64String(encodedKey);
string keyJson = ByteConverter.GetString(keyBytes);
jwkPrivateKey key = serializer.Deserialize <jwkPrivateKey>(keyJson);
Object rsaKey;
RSAParameters rsaParams;
if (key.d != null)
{
rsaKey = new rsaPrivateKey(key);
rsaParams = (rsaKey as rsaPrivateKey).toRSAParameters();
}
else
{
rsaKey = new rsaPublicKey(key);
rsaParams = (rsaKey as rsaPublicKey).toRSAParameters();
}
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider();
rsaCsp.ImportParameters(rsaParams);
return(rsaCsp);
}
public Object decrypt(jwkPrivateKey privateKey, byte[] cipherBytes, string hashAlgorithm)
{
rsaPrivateKey rsaKey = new rsaPrivateKey(privateKey);
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider();
RSAParameters rsaParams = rsaKey.toRSAParameters();
rsaCsp.ImportParameters(rsaParams);
byte[] decryptedBytes;
try
{
if (hashAlgorithm == null)
{
decryptedBytes = rsaCsp.Decrypt(cipherBytes, false);
}
else
{
decryptedBytes = decryptCamelotOAEP(rsaParams, hashAlgorithm, cipherBytes);
}
}
catch (Exception ex)
{
return(new Error(ex));
}
return(decryptedBytes);
}
public Object sign(string mode, jwkPrivateKey privateKey, byte[] plainBytes, string hashAlgorithm, string curveName)
{
byte[] signature;
if (mode == "ecdsa")
{
EllipticCurveFp curve = selectCamelotCurve(curveName);
ecPrivateKey ecPrivateKey = new ecPrivateKey(privateKey);
camelot.ECKeyPair ecKeyPairPrivate = new camelot.ECKeyPair(curve, ecPrivateKey.D, null);
camelot.HashAlgorithm h = selectCamelotHashAlgorithm(hashAlgorithm);
byte[] digest = h.ComputeHash(plainBytes);
signature = signCamelotEcdsa(ecKeyPairPrivate, digest);
}
else
{
rsaPrivateKey rsaKey = new rsaPrivateKey(privateKey);
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider();
RSAParameters rsaParams = rsaKey.toRSAParameters();
rsaCsp.ImportParameters(rsaParams);
if (mode == "rsa-pss")
{
signature = signCamelotPSS(rsaParams, hashAlgorithm, plainBytes);
}
else if (mode == "rsassa-pkcs1-v1_5")
{
signature = rsaCsp.SignData(plainBytes, selectCSPHashAlgorithm(hashAlgorithm));
}
else
{
throw new InvalidOperationException("Unsupported mode");
}
}
return(signature);
}
