FRAQRUtils.m revision eea09ddc6e4b4287103c8500027f3e65b5470280
/*
* The contents of this file are subject to the terms of the Common Development and
* Distribution License (the License). You may not use this file except in compliance with the
* License.
*
* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
* specific language governing permission and limitations under the License.
*
* When distributing Covered Software, include this CDDL Header Notice in each file and include
* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
* Header, with the fields enclosed by brackets [] replaced by your own identifying
* information: "Portions copyright [year] [name of copyright owner]".
*
* Copyright 2016 ForgeRock AS.
*/
#import "FRAQRUtils.h"
static NSString * const VALID_BASE64_CHARACTERS = @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
@implementation FRAQRUtils
+ (NSString *)replaceCharactersForURLDecoding:(NSString *)content {
NSString * fixed = [content stringByReplacingOccurrencesOfString:@"-" withString:@"+"];
return [fixed stringByReplacingOccurrencesOfString:@"_" withString:@"/"];
}
+ (NSData *)decodeURL:(NSString *) content {
NSString * fixed = [FRAQRUtils replaceCharactersForURLDecoding:content];
[self pad:fixed];
return [FRAQRUtils decodeBase64:fixed];
}
+ (NSData *)decodeBase64:(NSString *) base64String {
if (!base64String) {
return nil;
}
base64String = [self pad:base64String];
return [[NSData alloc] initWithBase64EncodedString:base64String options:0];
}
+ (NSString *)decode:(NSString *)content {
return [content stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}
+ (NSString *)pad:(NSString *)content {
int paddSize = (4 - ([content length] % 4)) % 4;
if(paddSize != 0) {
for(int i = 0; i < paddSize; ++i) {
content = [content stringByAppendingString:@"="];
}
}
return content;
}
+ (BOOL)isBase64:(NSString *)content {
static NSCharacterSet *invertedBase64CharacterSet = nil;
if (invertedBase64CharacterSet == nil) {
invertedBase64CharacterSet = [[NSCharacterSet characterSetWithCharactersInString:VALID_BASE64_CHARACTERS] invertedSet];
}
return [content rangeOfCharacterFromSet:invertedBase64CharacterSet options:NSLiteralSearch].location == NSNotFound;
}
@end