/// Returns the RSA public key associated to the government that should be used when
/// encrypting the data that only it should see.
public static async Task <RSAPublicKey> getGovernmentRsaPubKey(String lcdUrl)
// public static RSAPublicKey getGovernmentRsaPubKey()
{
Object tumblerResponse = await Network.query($"{lcdUrl}/government/tumbler");
if (tumblerResponse == null)
{
System.ArgumentException argEx = new System.ArgumentException("getGovernmentRsaPubKey: Cannot get tumbler address");
throw argEx;
}
TumblerResponse tumbler = new TumblerResponse(JObject.Parse(tumblerResponse.ToString()));
String tumblerAddress = tumbler.result.tumblerAddress;
Object identityResponseRaw = await Network.query($"{lcdUrl}/identities/{tumblerAddress}");
if (identityResponseRaw == null)
{
System.ArgumentException argEx = new System.ArgumentException("getGovernmentRsaPubKey: Cannot get government RSA public key");
throw argEx;
}
IdentityResponse identityResponse = new IdentityResponse(JObject.Parse(identityResponseRaw.ToString()));
String publicSignatureKeyPem = identityResponse.result.didDocument.publicKeys[1].publicKeyPem;
RsaKeyParameters rsaPublicKey = RSAKeyParser.parsePublicKeyFromPem(publicSignatureKeyPem);
return(new RSAPublicKey(rsaPublicKey));
}
/// Returns the [PublicKey] that should be used as the public encryption
/// key when encrypting data that can later be read only by the owner of
/// this Did Document.
public RSAPublicKey encryptionKey()
{
DidDocumentPublicKey pubKey = publicKeys.FirstOrDefault(key => key.type == "RsaVerificationKey2018");
if (pubKey == null)
{
return(null);
}
return(new RSAPublicKey(RSAKeyParser.parsePublicKeyFromPem(pubKey.publicKeyPem)));
//// If existent, creates the RSA public key
//BigInteger modulus = new BigInteger(pubKey.publicKeyHex, radix: 16);
//BigInteger exponent = new BigInteger("65537", radix: 10);
//return new RSAPublicKey(new RsaKeyParameters(false, modulus, exponent));
}