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Allow pairing to complete in the background to allow users to type the PIN using remote desktop apps

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This commit is contained in:
Cameron Gutman
2019-07-05 22:18:30 -07:00
parent 7d3eaeef83
commit ed10612e2c
2 changed files with 35 additions and 14 deletions
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47
Limelight/Network/PairManager.m
View File

@@ -53,10 +53,32 @@
}
}
// All codepaths must call pairFailed or pairSuccessful exactly once before returning!
- (void) finishPairing:(UIBackgroundTaskIdentifier)bgId withError:(NSString*)errorMsg {
if (bgId != UIBackgroundTaskInvalid) {
[[UIApplication sharedApplication] endBackgroundTask:bgId];
}
[_callback pairFailed:errorMsg];
}
- (void) finishPairing:(UIBackgroundTaskIdentifier)bgId withSuccess:(NSData*)derCertBytes {
if (bgId != UIBackgroundTaskInvalid) {
[[UIApplication sharedApplication] endBackgroundTask:bgId];
}
[_callback pairSuccessful:derCertBytes];
}
// All codepaths must call finishPairing exactly once before returning!
- (void) initiatePair:(int)serverMajorVersion {
Log(LOG_I, @"Pairing with generation %d server", serverMajorVersion);
// Start a background task to help prevent the app from being killed
// while pairing is in progress.
UIBackgroundTaskIdentifier bgId = [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"Pairing PC" expirationHandler:^{
Log(LOG_W, @"Background pairing time has expired!");
}];
NSString* PIN = [self generatePIN];
NSData* salt = [self saltPIN:PIN];
Log(LOG_I, @"PIN: %@, saltedPIN: %@", PIN, salt);
@@ -65,18 +87,18 @@
HttpResponse* pairResp = [[HttpResponse alloc] init];
[_httpManager executeRequestSynchronously:[HttpRequest requestForResponse:pairResp withUrlRequest:[_httpManager newPairRequest:salt clientCert:_clientCert]]];
if (![self verifyResponseStatus:pairResp]) {
[_callback pairFailed:@"Pairing stage #1 failed"];
[self finishPairing:bgId withError:@"Pairing stage #1 failed"];
return;
}
NSInteger pairedStatus;
if (![pairResp getIntTag:@"paired" value:&pairedStatus] || !pairedStatus) {
[_callback pairFailed:@"Pairing was declined by the target."];
[self finishPairing:bgId withError:@"Pairing was declined by the target."];
return;
}
NSString* plainCert = [pairResp getStringTag:@"plaincert"];
if ([plainCert length] == 0) {
[_callback pairFailed:@"Another pairing attempt is already in progress."];
[self finishPairing:bgId withError:@"Another pairing attempt is already in progress."];
return;
}
@@ -107,7 +129,7 @@
![challengeResp getIntTag:@"paired" value:&pairedStatus] ||
pairedStatus != 1) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Pairing stage #2 failed"];
[self finishPairing:bgId withError:@"Pairing stage #2 failed"];
return;
}
@@ -134,7 +156,7 @@
![secretResp getIntTag:@"paired" value:&pairedStatus] ||
pairedStatus != 1) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Pairing stage #3 failed"];
[self finishPairing:bgId withError:@"Pairing stage #3 failed"];
return;
}
@@ -144,7 +166,7 @@
if (![cryptoMan verifySignature:serverSecret withSignature:serverSignature andCert:[Utils hexToBytes:plainCert]]) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Server certificate invalid"];
[self finishPairing:bgId withError:@"Server certificate invalid"];
return;
}
@@ -158,7 +180,7 @@
}
if (![serverChallengeRespHash isEqual:serverResponse]) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Incorrect PIN"];
[self finishPairing:bgId withError:@"Incorrect PIN"];
return;
}
@@ -169,7 +191,7 @@
![clientSecretResp getIntTag:@"paired" value:&pairedStatus] ||
pairedStatus != 1) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Pairing stage #4 failed"];
[self finishPairing:bgId withError:@"Pairing stage #4 failed"];
return;
}
@@ -179,21 +201,20 @@
![clientPairChallengeResp getIntTag:@"paired" value:&pairedStatus] ||
pairedStatus != 1) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Pairing stage #5 failed"];
[self finishPairing:bgId withError:@"Pairing stage #5 failed"];
return;
}
[_callback pairSuccessful: derCertBytes];
[self finishPairing:bgId withSuccess:derCertBytes];
}
// Caller calls finishPairing for us on failure
- (BOOL) verifyResponseStatus:(HttpResponse*)resp {
if (resp == nil) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:@"Network error occured."];
return false;
} else if (![resp isStatusOk]) {
[_httpManager executeRequestSynchronously:[HttpRequest requestWithUrlRequest:[_httpManager newUnpairRequest]]];
[_callback pairFailed:resp.statusMessage];
return false;
} else {
return true;

2
Limelight/ViewControllers/MainFrameViewController.m
View File

@@ -59,7 +59,7 @@ static NSMutableSet* hostList;
- (void)showPIN:(NSString *)PIN {
dispatch_async(dispatch_get_main_queue(), ^{
self->_pairAlert = [UIAlertController alertControllerWithTitle:@"Pairing"
message:[NSString stringWithFormat:@"Enter the following PIN on the host machine: %@\n\nNote: Navigating away from Moonlight before entering the PIN on your PC may cause pairing to fail.", PIN]
message:[NSString stringWithFormat:@"Enter the following PIN on the host machine: %@", PIN]
preferredStyle:UIAlertControllerStyleAlert];
[self->_pairAlert addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDestructive handler:^(UIAlertAction* action) {
self->_pairAlert = nil;