115 lines
4.6 KiB
Objective-C
115 lines
4.6 KiB
Objective-C
//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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#import "OWSScrubbingLogFormatter.h"
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NS_ASSUME_NONNULL_BEGIN
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@implementation OWSScrubbingLogFormatter
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- (NSRegularExpression *)phoneRegex
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{
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static NSRegularExpression *regex = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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NSError *error;
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regex = [NSRegularExpression regularExpressionWithPattern:@"\\+\\d{7,12}(\\d{3})"
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options:NSRegularExpressionCaseInsensitive
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error:&error];
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if (error || !regex) {
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OWSFail(@"could not compile regular expression: %@", error);
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}
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});
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return regex;
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}
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- (NSRegularExpression *)uuidRegex
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{
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static NSRegularExpression *regex = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// Example: AF112388-9F3D-4EBA-A321-CCE01BA2C85D
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NSError *error;
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regex = [NSRegularExpression
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regularExpressionWithPattern:
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@"[\\da-f]{8}\\-[\\da-f]{4}\\-[\\da-f]{4}\\-[\\da-f]{4}\\-[\\da-f]{10}([\\da-f]{2})"
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options:NSRegularExpressionCaseInsensitive
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error:&error];
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if (error || !regex) {
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OWSFail(@"could not compile regular expression: %@", error);
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}
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});
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return regex;
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}
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- (NSRegularExpression *)dataRegex
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{
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static NSRegularExpression *regex = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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NSError *error;
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regex = [NSRegularExpression regularExpressionWithPattern:@"<([\\da-f]{2})[\\da-f]{6}( [\\da-f]{8})*>"
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options:NSRegularExpressionCaseInsensitive
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error:&error];
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if (error || !regex) {
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OWSFail(@"could not compile regular expression: %@", error);
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}
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});
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return regex;
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}
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- (NSRegularExpression *)ipV4AddressRegex
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{
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static NSRegularExpression *regex = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// NOTE: The group matches the last quad of the IPv4 address.
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NSError *error;
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regex = [NSRegularExpression regularExpressionWithPattern:@"\\d+\\.\\d+\\.\\d+\\.(\\d+)"
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options:NSRegularExpressionCaseInsensitive
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error:&error];
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if (error || !regex) {
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OWSFail(@"could not compile regular expression: %@", error);
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}
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});
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return regex;
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}
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- (NSString *__nullable)formatLogMessage:(DDLogMessage *)logMessage
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{
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NSString *logString = [super formatLogMessage:logMessage];
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NSRegularExpression *phoneRegex = self.phoneRegex;
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logString = [phoneRegex stringByReplacingMatchesInString:logString
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options:0
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range:NSMakeRange(0, [logString length])
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withTemplate:@"[ REDACTED_PHONE_NUMBER:xxx$1 ]"];
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NSRegularExpression *uuidRegex = self.uuidRegex;
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logString = [uuidRegex stringByReplacingMatchesInString:logString
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options:0
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range:NSMakeRange(0, [logString length])
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withTemplate:@"[ REDACTED_UUID:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx$1 ]"];
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// We capture only the first two characters of the hex string for logging.
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// example log line: "Called someFunction with nsData: <01234567 89abcdef>"
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// scrubbed output: "Called someFunction with nsData: [ REDACTED_DATA:01 ]"
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NSRegularExpression *dataRegex = self.dataRegex;
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logString = [dataRegex stringByReplacingMatchesInString:logString
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options:0
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range:NSMakeRange(0, [logString length])
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withTemplate:@"[ REDACTED_DATA:$1... ]"];
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NSRegularExpression *ipV4AddressRegex = self.ipV4AddressRegex;
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logString = [ipV4AddressRegex stringByReplacingMatchesInString:logString
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options:0
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range:NSMakeRange(0, [logString length])
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withTemplate:@"[ REDACTED_IPV4_ADDRESS:...$1 ]"];
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return logString;
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}
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@end
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NS_ASSUME_NONNULL_END
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