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//
// MacProxyCredentialsProvider.cs
//
// Author:
// Bojan Rajkovic <bojan.rajkovic@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Net;
using MonoDevelop.Core;
using MonoDevelop.Core.Web;
using MonoDevelop.Ide;
using AppKit;
using CoreGraphics;
using Foundation;
using MonoDevelop.MacInterop;
using Security;
namespace MonoDevelop.MacIntegration
{
class MacProxyCredentialProvider : ICredentialProvider
{
static nint NSAlertFirstButtonReturn = 1000;
object guiLock = new object();
public ICredentials GetCredentials (Uri uri, IWebProxy proxy, CredentialType credentialType, bool retrying)
{
// if looking for proxy credentials, we care about the proxy's URL, not the request URL
if (credentialType == CredentialType.ProxyCredentials) {
var proxyUri = proxy.GetProxy (uri);
if (proxyUri != null)
uri = proxyUri;
}
lock (guiLock) {
// If this is the first attempt, return any stored credentials. If they fail, we'll be called again.
if (!retrying) {
var creds = GetExistingCredentials (uri, credentialType);
if (creds != null)
return creds;
}
return GetCredentialsFromUser (uri, proxy, credentialType);
}
}
static ICredentials GetSystemProxyCredentials (Uri uri)
{
var kind = SecProtocol.Http;
if (uri.Scheme == "http")
kind = SecProtocol.HttpProxy;
else if (uri.Scheme == "https")
kind = SecProtocol.HttpsProxy;
//TODO: get username from SystemConfiguration APIs so we don't trigger a double auth prompt
var existing = Keychain.FindInternetUserNameAndPassword (uri, kind);
if (existing != null && existing.Item1 != null && existing.Item2 != null)
return new NetworkCredential (existing.Item1, existing.Item2);
return null;
}
static ICredentials GetExistingCredentials (Uri uri, CredentialType credentialType)
{
if (credentialType == CredentialType.ProxyCredentials) {
var proxyCreds = GetSystemProxyCredentials (uri);
if (proxyCreds != null)
return proxyCreds;
}
var rootUri = new Uri (uri.GetComponents (UriComponents.SchemeAndServer, UriFormat.SafeUnescaped));
var existing =
Keychain.FindInternetUserNameAndPassword (uri) ??
Keychain.FindInternetUserNameAndPassword (rootUri);
return existing != null ? new NetworkCredential (existing.Item1, existing.Item2) : null;
}
static ICredentials GetCredentialsFromUser (Uri uri, IWebProxy proxy, CredentialType credentialType)
{
NetworkCredential result = null;
Runtime.RunInMainThread (() => {
using (var ns = new NSAutoreleasePool ()) {
var message = credentialType == CredentialType.ProxyCredentials
? GettextCatalog.GetString (
"{0} needs credentials to access the proxy server {1}.",
BrandingService.ApplicationName,
uri.Host
)
: GettextCatalog.GetString (
"{0} needs credentials to access {1}.",
BrandingService.ApplicationName,
uri.Host
);
using (var alert = new NSAlert ()) {
alert.MessageText = GettextCatalog.GetString ("Credentials Required");
alert.InformativeText = message;
var okButton = alert.AddButton (GettextCatalog.GetString ("OK"));
var cancelButton = alert.AddButton (GettextCatalog.GetString ("Cancel"));
alert.Icon = MacPlatformService.ApplicationIcon;
var view = new NSView (new CGRect (0, 0, 313, 91));
var usernameLabel = new NSTextField (new CGRect (17, 55, 71, 17)) {
Identifier = "usernameLabel",
StringValue = "Username:",
Alignment = NSTextAlignment.Right,
Editable = false,
Bordered = false,
DrawsBackground = false,
Bezeled = false,
Selectable = false,
};
view.AddSubview (usernameLabel);
var usernameInput = new NSTextField (new CGRect (93, 52, 200, 22));
view.AddSubview (usernameInput);
var passwordLabel = new NSTextField (new CGRect (22, 23, 66, 17)) {
StringValue = "Password:",
Alignment = NSTextAlignment.Right,
Editable = false,
Bordered = false,
DrawsBackground = false,
Bezeled = false,
Selectable = false,
};
view.AddSubview (passwordLabel);
var passwordInput = new NSSecureTextField (new CGRect (93, 20, 200, 22));
view.AddSubview (passwordInput);
using (var alertDelegate = new PasswordAlertWindowDelegate (usernameInput, passwordInput, cancelButton, okButton)) {
alert.AccessoryView = view;
MonoDevelop.Components.IdeTheme.ApplyTheme (alert.Window);
alert.Window.WeakDelegate = alertDelegate;
alert.Window.InitialFirstResponder = usernameInput;
alert.Window.ReleasedWhenClosed = true;
if (alert.RunModal () == NSAlertFirstButtonReturn) {
var username = usernameInput.StringValue;
var password = passwordInput.StringValue;
result = new NetworkCredential (username, password);
}
alert.Window.Close ();
}
}
}
}).Wait ();
// store the obtained credentials in the keychain
// but don't store for the root url since it may have other credentials
if (result != null)
Keychain.AddInternetPassword (uri, result.UserName, result.Password);
return result;
}
class PasswordAlertWindowDelegate : NSWindowDelegate
{
readonly WeakReference<NSTextField> weakUsernameInput;
readonly WeakReference<NSTextField> weakPasswordInput;
readonly WeakReference<NSButton> weakCancelButton;
readonly WeakReference<NSButton> weakOkButton;
public PasswordAlertWindowDelegate (NSTextField usernameInput, NSTextField passwordInput, NSButton cancelButton, NSButton okButton)
{
weakUsernameInput = new WeakReference<NSTextField> (usernameInput);
weakPasswordInput = new WeakReference<NSTextField> (passwordInput);
weakCancelButton = new WeakReference<NSButton> (cancelButton);
weakOkButton = new WeakReference<NSButton> (okButton);
}
public override void DidBecomeKey (NSNotification notification)
{
if (!weakUsernameInput.TryGetTarget (out var usernameInput) ||
!weakPasswordInput.TryGetTarget (out var passwordInput) ||
!weakCancelButton.TryGetTarget (out var cancelButton) ||
!weakOkButton.TryGetTarget (out var okButton))
return;
// The NSAlert defines the keyviewloop after it is displayed so the tab order is defined
// here otherwise once the focus is on the OK and Cancel buttons it is not possible to tab
// to the username and password NSTextFields.
usernameInput.NextKeyView = passwordInput;
passwordInput.NextKeyView = cancelButton;
okButton.NextKeyView = usernameInput;
}
}
}
}
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