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/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "FIRAuthWebUtils.h"
#import <GoogleToolboxForMac/GTMNSDictionary+URLArguments.h>
#import "FIRAuthBackend.h"
#import "FIRAuthErrorUtils.h"
#import "FIRGetProjectConfigRequest.h"
#import "FIRGetProjectConfigResponse.h"
/** @var kAuthDomainSuffix
@brief The suffix of the auth domain pertiaining to a given Firebase project.
*/
static NSString *const kAuthDomainSuffix = @"firebaseapp.com";
@implementation FIRAuthWebUtils
+ (NSString *)randomStringWithLength:(NSUInteger)length {
NSMutableString *randomString = [[NSMutableString alloc] init];
for (int i=0; i < length; i++) {
[randomString appendString:
[NSString stringWithFormat:@"%c", 'a' + arc4random_uniform('z' - 'a' + 1)]];
}
return randomString;
}
+ (BOOL)isCallbackSchemeRegisteredForCustomURLScheme:(NSString *)URLScheme {
NSString *expectedCustomScheme = [URLScheme lowercaseString];
NSArray *urlTypes = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleURLTypes"];
for (NSDictionary *urlType in urlTypes) {
NSArray *urlTypeSchemes = urlType[@"CFBundleURLSchemes"];
for (NSString *urlTypeScheme in urlTypeSchemes) {
if ([urlTypeScheme.lowercaseString isEqualToString:expectedCustomScheme]) {
return YES;
}
}
}
return NO;
}
+ (BOOL)isExpectedCallbackURL:(NSURL *)URL
eventID:(NSString *)eventID
authType:(NSString *)authType
callbackScheme:(NSString *)callbackScheme {
if (!URL) {
return NO;
}
NSURLComponents *actualURLComponents =
[NSURLComponents componentsWithURL:URL resolvingAgainstBaseURL:NO];
actualURLComponents.query = nil;
actualURLComponents.fragment = nil;
NSURLComponents *expectedURLComponents = [NSURLComponents new];
expectedURLComponents.scheme = callbackScheme;
expectedURLComponents.host = @"firebaseauth";
expectedURLComponents.path = @"/link";
if (!([[expectedURLComponents URL] isEqual:[actualURLComponents URL]])) {
return NO;
}
NSDictionary<NSString *, NSString *> *URLQueryItems =
[NSDictionary gtm_dictionaryWithHttpArgumentsString:URL.query];
NSURL *deeplinkURL = [NSURL URLWithString:URLQueryItems[@"deep_link_id"]];
NSDictionary<NSString *, NSString *> *deeplinkQueryItems =
[NSDictionary gtm_dictionaryWithHttpArgumentsString:deeplinkURL.query];
if ([deeplinkQueryItems[@"authType"] isEqualToString:authType] &&
[deeplinkQueryItems[@"eventId"] isEqualToString:eventID]) {
return YES;
}
return NO;
}
+ (void)fetchAuthDomainWithRequestConfiguration:(FIRAuthRequestConfiguration *)requestConfiguration
completion:(FIRFetchAuthDomainCallback)completion {
FIRGetProjectConfigRequest *request =
[[FIRGetProjectConfigRequest alloc] initWithRequestConfiguration:requestConfiguration];
[FIRAuthBackend getProjectConfig:request
callback:^(FIRGetProjectConfigResponse *_Nullable response,
NSError *_Nullable error) {
if (error) {
completion(nil, error);
return;
}
NSString *authDomain;
for (NSString *domain in response.authorizedDomains) {
NSInteger index = domain.length - kAuthDomainSuffix.length;
if (index >= 2) {
if ([domain hasSuffix:kAuthDomainSuffix] && domain.length >= kAuthDomainSuffix.length + 2) {
authDomain = domain;
break;
}
}
}
if (!authDomain.length) {
completion(nil, [FIRAuthErrorUtils unexpectedErrorResponseWithDeserializedResponse:response]);
return;
}
completion(authDomain, nil);
}];
}
/** @fn queryItemValue:from:
@brief Utility function to get a value from a NSURLQueryItem array.
@param name The key.
@param queryList The NSURLQueryItem array.
@return The value for the key.
*/
+ (NSString *)queryItemValue:(NSString *)name from:(NSArray<NSURLQueryItem *> *)queryList {
for (NSURLQueryItem *item in queryList) {
if ([item.name isEqualToString:name]) {
return item.value;
}
}
return nil;
}
@end
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