105 lines
3.8 KiB
Objective-C
105 lines
3.8 KiB
Objective-C
/*
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* Copyright 2019 Google
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "FIRInstallationsItem.h"
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#import "FIRInstallationsStoredAuthToken.h"
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#import "FIRInstallationsStoredItem.h"
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@implementation FIRInstallationsItem
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- (instancetype)initWithAppID:(NSString *)appID firebaseAppName:(NSString *)firebaseAppName {
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self = [super init];
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if (self) {
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_appID = [appID copy];
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_firebaseAppName = [firebaseAppName copy];
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}
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return self;
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}
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- (nonnull id)copyWithZone:(nullable NSZone *)zone {
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FIRInstallationsItem *clone = [[FIRInstallationsItem alloc] initWithAppID:self.appID
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firebaseAppName:self.firebaseAppName];
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clone.firebaseInstallationID = [self.firebaseInstallationID copy];
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clone.refreshToken = [self.refreshToken copy];
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clone.authToken = [self.authToken copy];
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clone.registrationStatus = self.registrationStatus;
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return clone;
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}
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- (void)updateWithStoredItem:(FIRInstallationsStoredItem *)item {
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self.firebaseInstallationID = item.firebaseInstallationID;
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self.refreshToken = item.refreshToken;
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self.authToken = item.authToken;
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self.registrationStatus = item.registrationStatus;
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self.IIDDefaultToken = item.IIDDefaultToken;
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}
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- (FIRInstallationsStoredItem *)storedItem {
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FIRInstallationsStoredItem *storedItem = [[FIRInstallationsStoredItem alloc] init];
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storedItem.firebaseInstallationID = self.firebaseInstallationID;
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storedItem.refreshToken = self.refreshToken;
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storedItem.authToken = self.authToken;
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storedItem.registrationStatus = self.registrationStatus;
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storedItem.IIDDefaultToken = self.IIDDefaultToken;
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return storedItem;
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}
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- (nonnull NSString *)identifier {
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return [[self class] identifierWithAppID:self.appID appName:self.firebaseAppName];
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}
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+ (NSString *)identifierWithAppID:(NSString *)appID appName:(NSString *)appName {
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return [appID stringByAppendingString:appName];
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}
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+ (NSString *)generateFID {
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NSUUID *UUID = [NSUUID UUID];
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uuid_t UUIDBytes;
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[UUID getUUIDBytes:UUIDBytes];
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NSUInteger UUIDLength = sizeof(uuid_t);
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NSData *UUIDData = [NSData dataWithBytes:UUIDBytes length:UUIDLength];
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uint8_t UUIDLast4Bits = UUIDBytes[UUIDLength - 1] & 0b00001111;
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// FID first 4 bits must be `0111`. The last 4 UUID bits will be cut later to form a proper FID.
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// To keep 16 random bytes we copy these last 4 UUID to the FID 1st byte after `0111` prefix.
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uint8_t FIDPrefix = 0b01110000 | UUIDLast4Bits;
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NSMutableData *FIDData = [NSMutableData dataWithBytes:&FIDPrefix length:1];
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[FIDData appendData:UUIDData];
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NSString *FIDString = [self base64URLEncodedStringWithData:FIDData];
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// A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5 bytes.
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// Our generated ID has 16 bytes UUID + 1 byte prefix which after encoding with base64 will become
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// 23 characters plus 1 character for "=" padding.
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// Remove the 23rd character that was added because of the extra 4 bits at the
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// end of our 17 byte data and the '=' padding.
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return [FIDString substringWithRange:NSMakeRange(0, 22)];
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}
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+ (NSString *)base64URLEncodedStringWithData:(NSData *)data {
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NSString *string = [data base64EncodedStringWithOptions:0];
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string = [string stringByReplacingOccurrencesOfString:@"/" withString:@"_"];
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string = [string stringByReplacingOccurrencesOfString:@"+" withString:@"-"];
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return string;
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}
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@end
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