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Merged
merged 8 commits into from
Oct 8, 2021
Merged

Add support for Facebook Limited Login. #995

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7eb4de5
Add support for Facebook Limited Login.
rosalyntan Jul 26, 2021
4ff100f
Merge branch 'master' into rosalyntan.limited
rosalyntan Jul 28, 2021
dac3ee1
Address review comment to use shared utility method for nonce and has…
rosalyntan Jul 29, 2021
d0f1c23
Fix and update demo app.
rosalyntan Jul 29, 2021
8c5e602
Extract some duplicate code into a helper method.
rosalyntan Jul 29, 2021
18f04f6
Fix Facebook Login in Swift sample app.
rosalyntan Jul 30, 2021
1ffbd9d
Add Facebook Limited Login to Swift demo app.
rosalyntan Jul 30, 2021
0e5697a
Make the Facebook ID token available in addition to the access token.
rosalyntan Sep 18, 2021
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71 changes: 13 additions & 58 deletions FirebaseFacebookAuthUI/Sources/FUIFacebookAuth.m
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Original file line number Diff line number Diff line change
Expand Up @@ -20,13 +20,11 @@
#import <FirebaseAuth/FirebaseAuth.h>

#if SWIFT_PACKAGE
@import CommonCrypto;
@import FBSDKCoreKit;
@import FBSDKLoginKit;
#else
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>
#import <CommonCrypto/CommonCrypto.h>
#endif // SWIFT_PACKAGE

/** @var kTableName
Expand Down Expand Up @@ -70,6 +68,11 @@ @interface FUIFacebookAuth () <FUIAuthProvider>
*/
@property(nonatomic, strong) FIROAuthProvider *providerForEmulator;

/** @property currentNonce
@brief The nonce for the current Facebook Limited Login session, if any.
*/
@property(nonatomic, copy, nullable) NSString *currentNonce;

@end

@implementation FUIFacebookAuth {
Expand All @@ -88,11 +91,6 @@ @implementation FUIFacebookAuth {
@brief The email address associated with this account.
*/
NSString *_email;

/** @var _currentNonce
@brief The current nonce for a Facebook Limited Login sign-in attempt.
*/
NSString *_currentNonce;
}

+ (NSBundle *)bundle {
Expand Down Expand Up @@ -200,12 +198,12 @@ - (void)signInWithDefaultValue:(nullable NSString *)defaultValue

if (self.useLimitedLogin) {
// Facebook Limited Login
NSString *nonce = [self randomNonce];
self->_currentNonce = nonce;
NSString *nonce = [FUIAuthUtils randomNonce];
self.currentNonce = nonce;
FBSDKLoginConfiguration *configuration =
[[FBSDKLoginConfiguration alloc] initWithPermissions:_scopes
tracking:FBSDKLoginTrackingLimited
nonce:[self stringBySha256HashingString:nonce]];
nonce:[FUIAuthUtils stringBySHA256HashingString:nonce]];
[_loginManager logInFromViewController:presentingViewController
configuration:configuration
completion:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
Expand Down Expand Up @@ -306,7 +304,7 @@ - (BOOL)handleOpenURL:(NSURL *)URL sourceApplication:(NSString *)sourceApplicati

#pragma mark -

/** @fn completeSignInFlowWithAccessToken:error:
/** @fn completeSignInFlowWithAccessToken:idToken:error:
@brief Called with the result of a Facebook sign-in attempt. Invokes and clears any pending
sign in callback block.
@param accessToken The Facebook access token, if the Facebook sign-in attempt with tracking enabled is successful.
Expand All @@ -322,14 +320,14 @@ - (void)completeSignInFlowWithAccessToken:(nullable NSString *)accessToken
}
FIRAuthCredential *credential;
if (idToken) {
NSString *rawNonce = self->_currentNonce;
NSString *rawNonce = self.currentNonce;
credential = [FIROAuthProvider credentialWithProviderID:FIRFacebookAuthProviderID
IDToken:idToken
rawNonce:rawNonce];
} else {
// Assume accessToken cannot be nil if there's no error and idToken is nil.
NSString *_Nonnull token = (id _Nonnull)accessToken;
credential = [FIRFacebookAuthProvider credentialWithAccessToken:token];
// Assume accessToken cannot be nil if there's no error and idToken is nil.
NSString *_Nonnull token = (id _Nonnull)accessToken;
credential = [FIRFacebookAuthProvider credentialWithAccessToken:token];
}
UIActivityIndicatorView *activityView =
[FUIAuthBaseViewController addActivityIndicator:_presentingViewController.view];
Expand Down Expand Up @@ -394,47 +392,4 @@ - (FBSDKLoginManager *)createLoginManager {
return [[FBSDKLoginManager alloc] init];
}

- (NSString *)randomNonce {
NSString *characterSet = @"0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz-._";
NSMutableString *result = [NSMutableString string];
NSInteger remainingLength = 32;

while (remainingLength > 0) {
NSMutableArray *randoms = [NSMutableArray arrayWithCapacity:16];
for (NSInteger i = 0; i < 16; i++) {
uint8_t random = 0;
int errorCode = SecRandomCopyBytes(kSecRandomDefault, 1, &random);
NSAssert(errorCode == errSecSuccess, @"Unable to generate nonce: OSStatus %i", errorCode);

[randoms addObject:@(random)];
}

for (NSNumber *random in randoms) {
if (remainingLength == 0) {
break;
}

if (random.unsignedIntValue < characterSet.length) {
unichar character = [characterSet characterAtIndex:random.unsignedIntValue];
[result appendFormat:@"%C", character];
remainingLength--;
}
}
}

return result;
}

- (NSString *)stringBySha256HashingString:(NSString *)input {
const char *string = [input UTF8String];
unsigned char result[CC_SHA256_DIGEST_LENGTH];
CC_SHA256(string, (CC_LONG)strlen(string), result);

NSMutableString *hashed = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2];
for (NSInteger i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) {
[hashed appendFormat:@"%02x", result[i]];
}
return hashed;
}

@end
3 changes: 3 additions & 0 deletions FirebaseOAuthUI/Sources/FUIOAuth.m
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Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,9 @@ @interface FUIOAuth () <ASAuthorizationControllerDelegate, ASAuthorizationContro
*/
@property(nonatomic, copy, nullable) NSString *loginHintKey;

/** @property currentNonce
@brief The nonce for the current Sign in with Apple session, if any.
*/
@property(nonatomic, copy, nullable) NSString *currentNonce;

/** @property provider
Expand Down
6 changes: 6 additions & 0 deletions samples/objc/FirebaseUI-demo-objc/FUIAppDelegate.m
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@

@import Firebase;
@import FirebaseAuthUI;
@import FBSDKCoreKit;
#import <GTMSessionFetcher/GTMSessionFetcherLogging.h>

@implementation FUIAppDelegate
Expand All @@ -26,13 +27,18 @@ - (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[FIRApp configure];
[GTMSessionFetcher setLoggingEnabled:YES];
[[FBSDKApplicationDelegate sharedInstance] application:application
didFinishLaunchingWithOptions:launchOptions];
return YES;
}

- (BOOL)application:(UIApplication *)app
openURL:(NSURL *)url
options:(NSDictionary<NSString*, id> *)options {
NSString *sourceApplication = options[UIApplicationOpenURLOptionsSourceApplicationKey];
[[FBSDKApplicationDelegate sharedInstance] application:app
openURL:url
options:options];
return [self handleOpenUrl:url sourceApplication:sourceApplication];
}

Expand Down
31 changes: 24 additions & 7 deletions samples/objc/FirebaseUI-demo-objc/Resources/Main.storyboard
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Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15400" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="7RW-VL-qNI">
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="7RW-VL-qNI">
<device id="retina4_7" orientation="portrait" appearance="light"/>
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15404"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
Expand Down Expand Up @@ -162,7 +162,7 @@
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Custom Authorization UI" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="YxK-c8-9q7">
<rect key="frame" x="27" y="12" width="322" height="20"/>
<fontDescription key="fontDescription" type="system" pointSize="16"/>
<color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
<color key="textColor" systemColor="darkTextColor"/>
<nil key="highlightedColor"/>
</label>
<switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="JZd-6c-Soe">
Expand Down Expand Up @@ -191,7 +191,7 @@
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Custom Scopes" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="T07-wL-pGr">
<rect key="frame" x="27" y="12" width="322" height="20"/>
<fontDescription key="fontDescription" type="system" pointSize="16"/>
<color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
<color key="textColor" systemColor="darkTextColor"/>
<nil key="highlightedColor"/>
</label>
<switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="9Ma-Mx-g56">
Expand Down Expand Up @@ -225,14 +225,14 @@
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" alpha="0.80000000000000004" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" text="Link" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ig5-8M-jHk">
<label opaque="NO" userInteractionEnabled="NO" alpha="0.80000000000000004" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Link" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ig5-8M-jHk">
<rect key="frame" x="244" y="10.5" width="48" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="12"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" ambiguous="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="LiB-gr-jDR">
<switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="LiB-gr-jDR">
<rect key="frame" x="300" y="5.5" width="49" height="31"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<connections>
Expand Down Expand Up @@ -273,6 +273,17 @@
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" userInteractionEnabled="NO" alpha="0.80000000000000004" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Limited" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="XLV-Sd-fV6">
<rect key="frame" x="244" y="11.5" width="48" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="12"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
<switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="H4b-GH-bc7" userLabel="Facebook Switch">
<rect key="frame" x="300" y="6.5" width="49" height="31"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
</switch>
</subviews>
</tableViewCellContentView>
</tableViewCell>
Expand Down Expand Up @@ -537,6 +548,7 @@
<outlet property="customScopeSwitch" destination="9Ma-Mx-g56" id="Scy-Do-CrR"/>
<outlet property="emailLabel" destination="ig5-8M-jHk" id="a2T-8z-dxJ"/>
<outlet property="emailSwitch" destination="LiB-gr-jDR" id="I2g-oL-ZRC"/>
<outlet property="facebookSwitch" destination="H4b-GH-bc7" id="z4w-iM-AYz"/>
</connections>
</tableViewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="1w1-3x-wCC" userLabel="First Responder" sceneMemberID="firstResponder"/>
Expand All @@ -561,7 +573,7 @@
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="jIg-6e-k6g">
<rect key="frame" x="0.0" y="617" width="375" height="50"/>
<subviews>
<button opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="1000" horizontalCompressionResistancePriority="1000" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="T3i-kj-emg">
<button opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="1000" horizontalCompressionResistancePriority="1000" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="T3i-kj-emg">
<rect key="frame" x="333" y="8" width="34" height="34"/>
<state key="normal" title="Load"/>
<connections>
Expand Down Expand Up @@ -608,4 +620,9 @@
<point key="canvasLocation" x="2377" y="315"/>
</scene>
</scenes>
<resources>
<systemColor name="darkTextColor">
<color white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
</resources>
</document>
8 changes: 6 additions & 2 deletions samples/objc/FirebaseUI-demo-objc/Samples/Auth/FUIAuthViewController.m
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ @interface FUIAuthViewController () <FUIAuthDelegate>
@property (weak, nonatomic) IBOutlet UITableViewCell *cellEmail;
@property (weak, nonatomic) IBOutlet UISwitch *emailSwitch;
@property (weak, nonatomic) IBOutlet UILabel *emailLabel;
@property (weak, nonatomic) IBOutlet UISwitch *facebookSwitch;
@property (weak, nonatomic) IBOutlet UITableViewCell *cellUID;
@property (weak, nonatomic) IBOutlet UITableViewCell *anonymousSignIn;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *buttonAuthorization;
Expand Down Expand Up @@ -375,12 +376,14 @@ - (void)showAlertWithTitlte:(NSString *)title message:(NSString *)message {
- (NSArray *)getListOfIDPs {
return [[self class] getListOfIDPs:[self.tableView indexPathsForSelectedRows]
useCustomScopes:_customScopeSwitch.isOn
useEmailLink:_emailSwitch.isOn];
useEmailLink:_emailSwitch.isOn
useFacebookLimitedLogin:_facebookSwitch.isOn];
}

+ (NSArray *)getListOfIDPs:(NSArray<NSIndexPath *> *)selectedRows
useCustomScopes:(BOOL)useCustomScopes
useEmailLink:(BOOL)useEmaiLink {
useEmailLink:(BOOL)useEmaiLink
useFacebookLimitedLogin:(BOOL)useLimitedLogin {
NSMutableArray *providers = [NSMutableArray new];

for (NSIndexPath *indexPath in selectedRows) {
Expand Down Expand Up @@ -426,6 +429,7 @@ + (NSArray *)getListOfIDPs:(NSArray<NSIndexPath *> *)selectedRows
@"user_friends",
@"ads_read"]]
:[[FUIFacebookAuth alloc] initWithAuthUI:[FUIAuth defaultAuthUI]];
((FUIFacebookAuth *)provider).useLimitedLogin = useLimitedLogin;
break;
case kIDPTwitter:
provider = [FUIOAuth twitterAuthProvider];
Expand Down