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 encrypt(jwkPublicKey publicKey, byte[] plainBytes, string hashAlgorithm)
{
rsaPublicKey rsaKey = new rsaPublicKey(publicKey);
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider();
RSAParameters rsaParams = rsaKey.toRSAParameters();
rsaCsp.ImportParameters(rsaParams);
byte[] encryptedBytes;
try
{
if (hashAlgorithm == null)
{
encryptedBytes = rsaCsp.Encrypt(plainBytes, false);
}
else
{
rsaParams = rsaCsp.ExportParameters(false);
encryptedBytes = encryptCamelotOAEP(rsaParams, hashAlgorithm, plainBytes);
}
}
catch (Exception ex)
{
return(new Error(ex));
}
return(encryptedBytes);
}
public Object verify(String mode, jwkPublicKey publicKey, byte[] plainBytes, string hashAlgorithm, string curveName, byte[] signatureBytes)
{
bool verified = false;
if (mode == "ecdsa")
{
EllipticCurveFp curve = selectCamelotCurve(curveName);
ecPublicKey ecPublicKey = new ecPublicKey(publicKey);
EllipticCurvePointFp point =
new EllipticCurvePointFp(curve, false, ecPublicKey.X, ecPublicKey.Y);
camelot.ECKeyPair ecKeyPair =
new camelot.ECKeyPair(curve, SEC1EncodingFp.EncodePoint(point));
camelot.HashAlgorithm h = selectCamelotHashAlgorithm(hashAlgorithm);
byte[] digest = h.ComputeHash(plainBytes);
verified = verifyCamelotEcdsa(ecKeyPair, digest, signatureBytes);
}
else
{
rsaPublicKey rsaKey = new rsaPublicKey(publicKey);
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider();
RSAParameters rsaParams = rsaKey.toRSAParameters();
rsaCsp.ImportParameters(rsaParams);
if (mode == "rsa-pss")
{
verified = verifyCamelotPSS(rsaParams, hashAlgorithm, plainBytes, signatureBytes);
}
else if (mode == "rsassa-pkcs1-v1_5")
{
verified = rsaCsp.VerifyData(plainBytes, selectCSPHashAlgorithm(hashAlgorithm), signatureBytes);
}
else
{
throw new InvalidOperationException("Unsupported mode");
}
}
return(verified);
}
