62 lines
2.6 KiB
Objective-C
62 lines
2.6 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 <CommonCrypto/CommonDigest.h>
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#import "FStringUtilities.h"
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#import "NSData+SRB64Additions.h"
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@implementation FStringUtilities
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// http://stackoverflow.com/questions/3468268/objective-c-sha1
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// http://stackoverflow.com/questions/7310457/ios-objective-c-sha-1-and-base64-problem
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+ (NSString *) base64EncodedSha1:(NSString *)str {
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const char *cstr = [str cStringUsingEncoding:NSUTF8StringEncoding];
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// NSString reports length in characters, but we want it in bytes, which strlen will give us.
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unsigned long dataLen = strlen(cstr);
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NSData *data = [NSData dataWithBytes:cstr length:dataLen];
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uint8_t digest[CC_SHA1_DIGEST_LENGTH];
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CC_SHA1(data.bytes, (unsigned int)data.length, digest);
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NSData* output = [[NSData alloc] initWithBytes:digest length:CC_SHA1_DIGEST_LENGTH];
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return [FSRUtilities base64EncodedStringFromData:output];
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}
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+ (NSString *) urlDecoded:(NSString *)url {
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NSString* replaced = [url stringByReplacingOccurrencesOfString:@"+" withString:@" "];
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NSString* decoded = [replaced stringByRemovingPercentEncoding];
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// This is kind of a hack, but is generally how the js client works. We could run into trouble if
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// some piece is a correctly escaped %-sequence, and another isn't. But, that's bad input anyways...
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if (decoded) {
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return decoded;
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} else {
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return replaced;
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}
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}
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+ (NSString *) urlEncoded:(NSString *)url {
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// Didn't seem like there was an Apple NSCharacterSet that had our version of the encoding
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// So I made my own, following RFC 2396 https://www.ietf.org/rfc/rfc2396.txt
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// allowedCharacters = alphanum | "-" | "_" | "~"
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NSCharacterSet *allowedCharacters = [NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_~"];
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return [url stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacters];
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}
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+ (NSString *) sanitizedForUserAgent:(NSString *)str {
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return [str stringByReplacingOccurrencesOfString:@"/|_" withString:@"|" options:NSRegularExpressionSearch range:NSMakeRange(0, [str length])];
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}
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@end
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