mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
94 lines
3.5 KiB
Objective-C
94 lines
3.5 KiB
Objective-C
/*
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* Copyright 2017 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 "FTestAuthTokenGenerator.h"
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#import <CommonCrypto/CommonHMAC.h>
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#import "Base64.h"
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@implementation FTestAuthTokenGenerator
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+ (NSString *)jsonStringForData:(id)data {
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NSData *jsonData = [NSJSONSerialization dataWithJSONObject:data options:kNilOptions error:nil];
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return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
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}
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+ (NSNumber *)tokenVersion {
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return @0;
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}
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+ (NSMutableDictionary *)createOptionsClaims:(NSDictionary *)options {
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NSMutableDictionary *claims = [[NSMutableDictionary alloc] init];
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if (options) {
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NSDictionary *map = @{
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@"expires" : @"exp",
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@"notBefore" : @"nbf",
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@"admin" : @"admin",
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@"debug" : @"debug",
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@"simulate" : @"simulate"
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};
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for (NSString *claim in map) {
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if (options[claim] != nil) {
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NSString *claimName = [map objectForKey:claim];
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id val = [options objectForKey:claim];
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[claims setObject:val forKey:claimName];
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}
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}
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}
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return claims;
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}
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+ (NSString *)webSafeBase64:(NSString *)encoded {
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return [[[encoded stringByReplacingOccurrencesOfString:@"=" withString:@""]
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stringByReplacingOccurrencesOfString:@"+"
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withString:@"-"] stringByReplacingOccurrencesOfString:@"/"
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withString:@"_"];
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}
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+ (NSString *)base64EncodeString:(NSString *)target {
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return [self webSafeBase64:[target base64EncodedString]];
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}
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+ (NSString *)tokenWithClaims:(NSDictionary *)claims andSecret:(NSString *)secret {
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NSDictionary *headerData = @{@"typ" : @"JWT", @"alg" : @"HS256"};
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NSString *encodedHeader = [self base64EncodeString:[self jsonStringForData:headerData]];
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NSString *encodedClaims = [self base64EncodeString:[self jsonStringForData:claims]];
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NSString *secureBits = [NSString stringWithFormat:@"%@.%@", encodedHeader, encodedClaims];
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const char *cKey = [secret cStringUsingEncoding:NSUTF8StringEncoding];
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const char *cData = [secureBits cStringUsingEncoding:NSUTF8StringEncoding];
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unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];
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CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
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NSData *hmac = [NSData dataWithBytesNoCopy:cHMAC length:CC_SHA256_DIGEST_LENGTH freeWhenDone:NO];
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NSString *encodedHmac = [self webSafeBase64:[hmac base64EncodedString]];
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return [NSString stringWithFormat:@"%@.%@.%@", encodedHeader, encodedClaims, encodedHmac];
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}
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+ (NSString *)tokenWithSecret:(NSString *)secret
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authData:(NSDictionary *)data
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andOptions:(NSDictionary *)options {
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NSMutableDictionary *claims = [self createOptionsClaims:options];
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[claims setObject:[self tokenVersion] forKey:@"v"];
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NSNumber *now = [NSNumber numberWithDouble:[[NSDate date] timeIntervalSince1970]];
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[claims setObject:now forKey:@"iat"];
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[claims setObject:data forKey:@"d"];
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return [self tokenWithClaims:claims andSecret:secret];
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}
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@end
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