FRAQRUtils.m revision c0a2f8c6e84ddf9a597f19e5f161382b0e2cf81b
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa/*
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * The contents of this file are subject to the terms of the Common Development and
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * Distribution License (the License). You may not use this file except in compliance with the
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * License.
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa *
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * specific language governing permission and limitations under the License.
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa *
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * When distributing Covered Software, include this CDDL Header Notice in each file and include
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * Header, with the fields enclosed by brackets [] replaced by your own identifying
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * information: "Portions copyright [year] [name of copyright owner]".
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa *
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa * Copyright 2016 ForgeRock AS.
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa */
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa#import "FRAQRUtils.h"
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa@implementation FRAQRUtils
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa+ (NSString *) decodeURL:(NSString *) content {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa NSString * fixed = [content stringByReplacingOccurrencesOfString:@"-" withString:@"+"];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa fixed = [fixed stringByReplacingOccurrencesOfString:@"_" withString:@"/"];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa [self pad:fixed];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return [FRAQRUtils decodeBase64:fixed];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa+ (NSString *) decodeBase64:(NSString *) base64String {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa base64String = [self pad:base64String];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa NSData *decodedData = [[NSData alloc] initWithBase64EncodedString:base64String options:0];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa NSString *decodedString = [[NSString alloc] initWithData:decodedData encoding:NSUTF8StringEncoding];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return decodedString;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa+ (NSString *) decode:(NSString *) str {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (str == nil) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return nil;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa const char *tmp = [str UTF8String];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa NSMutableString *ret = [[NSMutableString alloc] init];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa for (NSUInteger i = 0; i < str.length; i++) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (tmp[i] != '%' || !ishex(tmp[i + 1]) || !ishex(tmp[i + 2])) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa [ret appendFormat:@"%c", tmp[i]];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa continue;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa uint8_t c = 0;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa c |= fromhex(tmp[++i]) << 4;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa c |= fromhex(tmp[++i]);
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa [ret appendFormat:@"%c", c];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return ret;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa+ (NSString *)pad:(NSString *)str {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa int paddSize = (4 - ([str length] % 4)) % 4;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if(paddSize != 0) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa for(int i = 0; i < paddSize; ++i) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa str = [str stringByAppendingString:@"="];
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return str;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksastatic BOOL ishex(char c) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= '0' && c <= '9') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return YES;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= 'A' && c <= 'F') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return YES;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= 'a' && c <= 'f') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return YES;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return NO;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksastatic uint8_t fromhex(char c) {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= '0' && c <= '9') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return c - '0';
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= 'A' && c <= 'F') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return c - 'A' + 10;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa if (c >= 'a' && c <= 'f') {
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return c - 'a' + 10;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa }
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa return 0;
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa}
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa
649fdc0d0502d62d160c150684356fef2c273484Eugen Kuksa@end