public object WelcomeKeeFoxUser(PendingRPCClient client)
{
WelcomeForm wf = new WelcomeForm();
DialogResult dr = wf.ShowDialog(_host.MainWindow);
if (dr == DialogResult.Yes || dr == DialogResult.No)
{
RPCService.AddKnownRPCClient(client);
}
if (dr == DialogResult.Yes)
{
CreateNewDatabase();
}
if (dr == DialogResult.Yes || dr == DialogResult.No)
{
return(0);
}
return(1);
}
public object WelcomeKeeFoxUser(PendingRPCClient client)
{
WelcomeForm wf = new WelcomeForm();
DialogResult dr = wf.ShowDialog(_host.MainWindow);
if (dr == DialogResult.Yes || dr == DialogResult.No)
RPCService.AddKnownRPCClient(client);
if (dr == DialogResult.Yes)
CreateNewDatabase();
if (dr == DialogResult.Yes || dr == DialogResult.No)
return 0;
return 1;
}
public AuthenticationResult Authenticate(int[] versionParts, string clientId, string b64IdSig, string b64PrivId)
{
//do version negotiation first so client and server know they'll
//be using correct key pairs (in case signatures are changed in future).
bool versionMatch = false;
if (versionParts == null || versionParts.Length != 3)
return new AuthenticationResult(2, clientId); // throw new AuthorisationException("Invalid version specification. Please state the version of RPC client that is requesting authorisation. This can differ from the version of your client application provided that the RPC interface remains identical.", -1, 2);
Version versionClient = new Version(versionParts[0], versionParts[1], versionParts[2]);
if (PluginVersion.CompareTo(versionClient) == 0)
versionMatch = true;
if (versionMatch == false)
return new AuthenticationResult(3, clientId); // version mismatch
if (string.IsNullOrEmpty(clientId))
return new AuthenticationResult(4, clientId); // missing clientId parameter
if (string.IsNullOrEmpty(b64IdSig))
return new AuthenticationResult(5, clientId); // missing base64 encoded clientId signature parameter
if (string.IsNullOrEmpty(b64PrivId))
return new AuthenticationResult(6, clientId); // missing base64 encoded unique client hash parameter
byte[] clientIdClaim = System.Text.Encoding.UTF8.GetBytes(clientId);
byte[] clientIdSignature = Convert.FromBase64String(b64IdSig);
// calculate hash of claimed client ID
SHA1 sha1 = new SHA1CryptoServiceProvider(); //TODO2: SHA256
byte[] clientIdClaimHash = sha1.ComputeHash(clientIdClaim);
// Load public key information
DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();
DSA.ImportCspBlob(GetClientIdPublicKey());
//Create an DSASignatureDeformatter object and pass it the
//DSACryptoServiceProvider to transfer the key information.
DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);
//Verify the hash and the signature
if (!DSADeformatter.VerifySignature(
clientIdClaimHash, clientIdSignature))
{
return new AuthenticationResult(7, clientId); // Signature invalid
}
// hash the (now authenticated) client Id and the client's
// secret unique identifier so we can tell if this particular
// client has conencted to KeePassRPC before
//TODO2: record failed attempts too so we can avoid bothering
// the user if they choose to ignore certain clients
byte[] data = System.Text.Encoding.UTF8.GetBytes("hash of: " + b64PrivId + clientId);
byte[] result;
SHA256 shaM = new SHA256Managed();
result = shaM.ComputeHash(data);
string clientHash = Convert.ToBase64String(result);
string currentKnownClients = host.CustomConfig
.GetString("KeePassRPC.knownClients." + clientId, "");
string[] knownClients = new string[0];
if (!string.IsNullOrEmpty(currentKnownClients))
{
knownClients = currentKnownClients.Split(',');
foreach (string knownClient in knownClients)
if (knownClient == clientHash)
return new AuthenticationResult(0, clientId); // everything's good, access granted
}
// This is the first time this type of client has
// connected to KeePassRPC so we start the new user
// wizard.
// TODO2: support wizards for different clients
if (knownClients.Length == 0 && clientId == "KeeFox Firefox add-on")
{
// The wizard handles user confirmation - if user says yes,
// the hash will be stored in the KeePass config file
PendingRPCClient newClient = new PendingRPCClient(
clientId, clientHash, new List<string>(knownClients));
object[] delParams = { newClient };
object invokeResult = host.MainWindow.Invoke(
new KeePassRPCExt.WelcomeKeeFoxUserDelegate(
KeePassRPCPlugin.WelcomeKeeFoxUser), delParams);
return new AuthenticationResult((int)invokeResult, clientId); // Should be 0 unless user cancels
}
else
{
DialogResult userConfirmationResult = MessageBox.Show(
"KeePass detected an attempt to connect to KeePass from '"
+ clientId
+ "'. Should KeePass allow this application to access your passwords?",
"Security check from the KeePassRPC plugin", MessageBoxButtons.YesNo,
MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2);
// if user says yes, we store the hash in the KeePass config file
if (userConfirmationResult == DialogResult.Yes)
{
AddKnownRPCClient(new PendingRPCClient(clientId, clientHash, new List<string>(knownClients)));
return new AuthenticationResult(0, clientId); // everything's good, access granted
}
return new AuthenticationResult(5, clientId);
}
//TODO2: audit logging options? needs to be a KeePass supported
//feature really or maybe a seperate plugin?
}
//TODO2: find some way that this can be private? (but really, what is
//private when any plugin could call anything in the appdomain through reflection anyway?...
internal void AddKnownRPCClient(PendingRPCClient client)
{
client.KnownClientList.Add(client.Hash);
string newKnownClients = string.Join(",", client.KnownClientList.ToArray());
host.CustomConfig.SetString("KeePassRPC.knownClients." + client.ClientId, newKnownClients);
host.MainWindow.Invoke((MethodInvoker)delegate { host.MainWindow.SaveConfig(); });
}