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Swiftgram/third-party/ZipArchive/Sources/SSZipArchive.m
Ali f29cfa3f24 Switch zip implementation
2021-01-25 18:39:31 +05:00

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//
// SSZipArchive.m
// SSZipArchive
//
// Created by Sam Soffes on 7/21/10.
// Copyright (c) Sam Soffes 2010-2015. All rights reserved.
//
#import <ZipArchive/ZipArchive.h>
#include "minizip/mz_compat.h"
#include "minizip/mz_zip.h"
#include <zlib.h>
#include <sys/stat.h>
NSString *const SSZipArchiveErrorDomain = @"SSZipArchiveErrorDomain";
#define CHUNK 16384
int _zipOpenEntry(zipFile entry, NSString *name, const zip_fileinfo *zipfi, int level, NSString *password, BOOL aes);
BOOL _fileIsSymbolicLink(const unz_file_info *fileInfo);
#ifndef API_AVAILABLE
// Xcode 7- compatibility
#define API_AVAILABLE(...)
#endif
@interface NSData(SSZipArchive)
- (NSString *)_base64RFC4648 API_AVAILABLE(macos(10.9), ios(7.0), watchos(2.0), tvos(9.0));
- (NSString *)_hexString;
@end
@interface NSString (SSZipArchive)
- (NSString *)_sanitizedPath;
@end
@interface SSZipArchive ()
- (instancetype)init NS_DESIGNATED_INITIALIZER;
@end
@implementation SSZipArchive
{
/// path for zip file
NSString *_path;
zipFile _zip;
}
#pragma mark - Password check
+ (BOOL)isFilePasswordProtectedAtPath:(NSString *)path {
// Begin opening
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL) {
return NO;
}
BOOL passwordProtected = NO;
int ret = unzGoToFirstFile(zip);
if (ret == UNZ_OK) {
do {
ret = unzOpenCurrentFile(zip);
if (ret != UNZ_OK) {
// attempting with an arbitrary password to workaround `unzOpenCurrentFile` limitation on AES encrypted files
ret = unzOpenCurrentFilePassword(zip, "");
unzCloseCurrentFile(zip);
if (ret == UNZ_OK || ret == MZ_PASSWORD_ERROR) {
passwordProtected = YES;
}
break;
}
unz_file_info fileInfo = {};
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
unzCloseCurrentFile(zip);
if (ret != UNZ_OK) {
break;
} else if ((fileInfo.flag & MZ_ZIP_FLAG_ENCRYPTED) == 1) {
passwordProtected = YES;
break;
}
ret = unzGoToNextFile(zip);
} while (ret == UNZ_OK);
}
unzClose(zip);
return passwordProtected;
}
+ (BOOL)isPasswordValidForArchiveAtPath:(NSString *)path password:(NSString *)pw error:(NSError **)error {
if (error) {
*error = nil;
}
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFailedOpenZipFile
userInfo:@{NSLocalizedDescriptionKey: @"failed to open zip file"}];
}
return NO;
}
// Initialize passwordValid to YES (No password required)
BOOL passwordValid = YES;
int ret = unzGoToFirstFile(zip);
if (ret == UNZ_OK) {
do {
if (pw.length == 0) {
ret = unzOpenCurrentFile(zip);
} else {
ret = unzOpenCurrentFilePassword(zip, [pw cStringUsingEncoding:NSUTF8StringEncoding]);
}
if (ret != UNZ_OK) {
if (ret != MZ_PASSWORD_ERROR) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFailedOpenFileInZip
userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip archive"}];
}
}
passwordValid = NO;
break;
}
unz_file_info fileInfo = {};
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if (ret != UNZ_OK) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFileInfoNotLoadable
userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
}
passwordValid = NO;
break;
} else if ((fileInfo.flag & 1) == 1) {
unsigned char buffer[10] = {0};
int readBytes = unzReadCurrentFile(zip, buffer, (unsigned)MIN(10UL,fileInfo.uncompressed_size));
if (readBytes < 0) {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
if (readBytes != Z_DATA_ERROR) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFileContentNotReadable
userInfo:@{NSLocalizedDescriptionKey: @"failed to read contents of file entry"}];
}
}
passwordValid = NO;
break;
}
passwordValid = YES;
break;
}
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
} while (ret == UNZ_OK);
}
unzClose(zip);
return passwordValid;
}
+ (NSNumber *)payloadSizeForArchiveAtPath:(NSString *)path error:(NSError **)error {
if (error) {
*error = nil;
}
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFailedOpenZipFile
userInfo:@{NSLocalizedDescriptionKey: @"failed to open zip file"}];
}
return @0;
}
unsigned long long totalSize = 0;
int ret = unzGoToFirstFile(zip);
if (ret == UNZ_OK) {
do {
ret = unzOpenCurrentFile(zip);
if (ret != UNZ_OK) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFailedOpenFileInZip
userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip archive"}];
}
break;
}
unz_file_info fileInfo = {};
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if (ret != UNZ_OK) {
if (error) {
*error = [NSError errorWithDomain:SSZipArchiveErrorDomain
code:SSZipArchiveErrorCodeFileInfoNotLoadable
userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
}
break;
}
totalSize += fileInfo.uncompressed_size;
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
} while (ret == UNZ_OK);
}
unzClose(zip);
return [NSNumber numberWithUnsignedLongLong:totalSize];
}
#pragma mark - Unzipping
+ (BOOL)unzipFileAtPath:(NSString *)path toDestination:(NSString *)destination
{
return [self unzipFileAtPath:path toDestination:destination delegate:nil];
}
+ (BOOL)unzipFileAtPath:(NSString *)path toDestination:(NSString *)destination overwrite:(BOOL)overwrite password:(nullable NSString *)password error:(NSError **)error
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:YES overwrite:overwrite password:password error:error delegate:nil progressHandler:nil completionHandler:nil];
}
+ (BOOL)unzipFileAtPath:(NSString *)path toDestination:(NSString *)destination delegate:(nullable id<SSZipArchiveDelegate>)delegate
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:YES overwrite:YES password:nil error:nil delegate:delegate progressHandler:nil completionHandler:nil];
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
overwrite:(BOOL)overwrite
password:(nullable NSString *)password
error:(NSError **)error
delegate:(nullable id<SSZipArchiveDelegate>)delegate
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:YES overwrite:overwrite password:password error:error delegate:delegate progressHandler:nil completionHandler:nil];
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
overwrite:(BOOL)overwrite
password:(NSString *)password
progressHandler:(void (^)(NSString *entry, unz_file_info zipInfo, long entryNumber, long total))progressHandler
completionHandler:(void (^)(NSString *path, BOOL succeeded, NSError * _Nullable error))completionHandler
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:YES overwrite:overwrite password:password error:nil delegate:nil progressHandler:progressHandler completionHandler:completionHandler];
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
progressHandler:(void (^_Nullable)(NSString *entry, unz_file_info zipInfo, long entryNumber, long total))progressHandler
completionHandler:(void (^_Nullable)(NSString *path, BOOL succeeded, NSError * _Nullable error))completionHandler
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:YES overwrite:YES password:nil error:nil delegate:nil progressHandler:progressHandler completionHandler:completionHandler];
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
preserveAttributes:(BOOL)preserveAttributes
overwrite:(BOOL)overwrite
password:(nullable NSString *)password
error:(NSError * *)error
delegate:(nullable id<SSZipArchiveDelegate>)delegate
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:preserveAttributes overwrite:overwrite password:password error:error delegate:delegate progressHandler:nil completionHandler:nil];
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
preserveAttributes:(BOOL)preserveAttributes
overwrite:(BOOL)overwrite
password:(nullable NSString *)password
error:(NSError **)error
delegate:(nullable id<SSZipArchiveDelegate>)delegate
progressHandler:(void (^_Nullable)(NSString *entry, unz_file_info zipInfo, long entryNumber, long total))progressHandler
completionHandler:(void (^_Nullable)(NSString *path, BOOL succeeded, NSError * _Nullable error))completionHandler
{
return [self unzipFileAtPath:path toDestination:destination preserveAttributes:preserveAttributes overwrite:overwrite nestedZipLevel:0 password:password error:error delegate:delegate progressHandler:progressHandler completionHandler:completionHandler];
}
+ (NSArray<SSZipEntry *> * _Nullable)getEntriesForFileAtPath:(NSString *)path {
if (path.length == 0) {
return nil;
}
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL) {
return nil;
}
unz_global_info globalInfo = {};
unzGetGlobalInfo(zip, &globalInfo);
int ret = 0;
ret = unzGoToFirstFile(zip);
if (ret != UNZ_OK && ret != MZ_END_OF_LIST) {
unzClose(zip);
return nil;
}
NSMutableArray<SSZipEntry *> *entries = [[NSMutableArray alloc] init];
BOOL success = YES;
int crc_ret = 0;
NSInteger currentFileNumber = -1;
NSError *unzippingError;
do {
currentFileNumber++;
if (ret == MZ_END_OF_LIST) {
break;
}
@autoreleasepool {
ret = unzOpenCurrentFile(zip);
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip file"}];
success = NO;
break;
}
// Reading data and write to file
unz_file_info fileInfo;
memset(&fileInfo, 0, sizeof(unz_file_info));
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
success = NO;
unzCloseCurrentFile(zip);
break;
}
char *filename = (char *)malloc(fileInfo.size_filename + 1);
if (filename == NULL) {
success = NO;
break;
}
unzGetCurrentFileInfo(zip, &fileInfo, filename, fileInfo.size_filename + 1, NULL, 0, NULL, 0);
filename[fileInfo.size_filename] = '\0';
BOOL fileIsSymbolicLink = _fileIsSymbolicLink(&fileInfo);
NSString *strPath = [SSZipArchive _filenameStringWithCString:filename
version_made_by:fileInfo.version
general_purpose_flag:fileInfo.flag
size:fileInfo.size_filename];
if (fileIsSymbolicLink || [strPath hasPrefix:@"__MACOSX/"]) {
// ignoring resource forks: https://superuser.com/questions/104500/what-is-macosx-folder
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
free(filename);
continue;
}
// Check if it contains directory
BOOL isDirectory = NO;
if (filename[fileInfo.size_filename-1] == '/' || filename[fileInfo.size_filename-1] == '\\') {
isDirectory = YES;
}
free(filename);
// Sanitize paths in the file name.
strPath = [strPath _sanitizedPath];
if (!strPath.length) {
// if filename data is unsalvageable, we default to currentFileNumber
strPath = @(currentFileNumber).stringValue;
}
[entries addObject:[[SSZipEntry alloc] initWithPath:strPath uncompressedSize:fileInfo.uncompressed_size]];
crc_ret = unzCloseCurrentFile(zip);
if (crc_ret == MZ_CRC_ERROR) {
// CRC ERROR
success = NO;
break;
}
ret = unzGoToNextFile(zip);
}
} while (ret == UNZ_OK && success);
// Close
unzClose(zip);
return entries;
}
+ (BOOL)extractFileFromArchiveAtPath:(NSString *)path filePath:(NSString *)filePath toPath:(NSString *)toPath {
if (path.length == 0 || filePath.length == 0 || toPath.length == 0) {
return false;
}
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL) {
return false;
}
unz_global_info globalInfo = {};
unzGetGlobalInfo(zip, &globalInfo);
// Begin unzipping
int ret = 0;
ret = unzGoToFirstFile(zip);
if (ret != UNZ_OK && ret != MZ_END_OF_LIST) {
unzClose(zip);
return false;
}
BOOL success = YES;
BOOL canceled = NO;
int crc_ret = 0;
unsigned char buffer[4096] = {0};
NSFileManager *fileManager = [NSFileManager defaultManager];
NSMutableArray<NSDictionary *> *directoriesModificationDates = [[NSMutableArray alloc] init];
NSInteger currentFileNumber = -1;
NSError *unzippingError;
do {
currentFileNumber++;
if (ret == MZ_END_OF_LIST) {
break;
}
@autoreleasepool {
ret = unzOpenCurrentFile(zip);
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip file"}];
success = NO;
break;
}
// Reading data and write to file
unz_file_info fileInfo;
memset(&fileInfo, 0, sizeof(unz_file_info));
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
success = NO;
unzCloseCurrentFile(zip);
break;
}
char *filename = (char *)malloc(fileInfo.size_filename + 1);
if (filename == NULL)
{
success = NO;
break;
}
unzGetCurrentFileInfo(zip, &fileInfo, filename, fileInfo.size_filename + 1, NULL, 0, NULL, 0);
filename[fileInfo.size_filename] = '\0';
BOOL fileIsSymbolicLink = _fileIsSymbolicLink(&fileInfo);
NSString * strPath = [SSZipArchive _filenameStringWithCString:filename
version_made_by:fileInfo.version
general_purpose_flag:fileInfo.flag
size:fileInfo.size_filename];
if ([strPath hasPrefix:@"__MACOSX/"]) {
// ignoring resource forks: https://superuser.com/questions/104500/what-is-macosx-folder
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
free(filename);
continue;
}
// Check if it contains directory
BOOL isDirectory = NO;
if (filename[fileInfo.size_filename-1] == '/' || filename[fileInfo.size_filename-1] == '\\') {
isDirectory = YES;
}
free(filename);
// Sanitize paths in the file name.
strPath = [strPath _sanitizedPath];
if (!strPath.length) {
// if filename data is unsalvageable, we default to currentFileNumber
strPath = @(currentFileNumber).stringValue;
}
if (![strPath isEqual:filePath]) {
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
continue;
}
NSString *fullPath = toPath;
NSError *err = nil;
NSDictionary *directoryAttr;
if ([fileManager fileExistsAtPath:fullPath]) {
//FIXME: couldBe CRC Check?
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
continue;
}
// ensure we are not creating stale file entries
int readBytes = unzReadCurrentFile(zip, buffer, 4096);
if (readBytes >= 0) {
FILE *fp = fopen(fullPath.fileSystemRepresentation, "wb");
while (fp) {
if (readBytes > 0) {
if (0 == fwrite(buffer, readBytes, 1, fp)) {
if (ferror(fp)) {
NSString *message = [NSString stringWithFormat:@"Failed to write file (check your free space)"];
NSLog(@"[SSZipArchive] %@", message);
success = NO;
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedToWriteFile userInfo:@{NSLocalizedDescriptionKey: message}];
break;
}
}
} else {
break;
}
readBytes = unzReadCurrentFile(zip, buffer, 4096);
if (readBytes < 0) {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
success = NO;
}
}
if (fp) {
fclose(fp);
}
else
{
// if we couldn't open file descriptor we can validate global errno to see the reason
int errnoSave = errno;
BOOL isSeriousError = NO;
switch (errnoSave) {
case EISDIR:
// Is a directory
// assumed case
break;
case ENOSPC:
case EMFILE:
// No space left on device
// or
// Too many open files
isSeriousError = YES;
break;
default:
// ignore case
// Just log the error
{
NSError *errorObject = [NSError errorWithDomain:NSPOSIXErrorDomain
code:errnoSave
userInfo:nil];
NSLog(@"[SSZipArchive] Failed to open file on unzipping.(%@)", errorObject);
}
break;
}
if (isSeriousError) {
// serious case
unzippingError = [NSError errorWithDomain:NSPOSIXErrorDomain
code:errnoSave
userInfo:nil];
unzCloseCurrentFile(zip);
// Log the error
NSLog(@"[SSZipArchive] Failed to open file on unzipping.(%@)", unzippingError);
// Break unzipping
success = NO;
break;
}
}
} else {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
success = NO;
break;
}
crc_ret = unzCloseCurrentFile(zip);
if (crc_ret == MZ_CRC_ERROR) {
// CRC ERROR
success = NO;
break;
}
ret = unzGoToNextFile(zip);
break;
}
} while (ret == UNZ_OK && success);
// Close
unzClose(zip);
NSError *retErr = nil;
if (crc_ret == MZ_CRC_ERROR)
{
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"crc check failed for file"};
retErr = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:userInfo];
}
return success;
}
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
preserveAttributes:(BOOL)preserveAttributes
overwrite:(BOOL)overwrite
nestedZipLevel:(NSInteger)nestedZipLevel
password:(nullable NSString *)password
error:(NSError **)error
delegate:(nullable id<SSZipArchiveDelegate>)delegate
progressHandler:(void (^_Nullable)(NSString *entry, unz_file_info zipInfo, long entryNumber, long total))progressHandler
completionHandler:(void (^_Nullable)(NSString *path, BOOL succeeded, NSError * _Nullable error))completionHandler
{
// Guard against empty strings
if (path.length == 0 || destination.length == 0)
{
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"received invalid argument(s)"};
NSError *err = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeInvalidArguments userInfo:userInfo];
if (error)
{
*error = err;
}
if (completionHandler)
{
completionHandler(nil, NO, err);
}
return NO;
}
// Begin opening
zipFile zip = unzOpen(path.fileSystemRepresentation);
if (zip == NULL)
{
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"failed to open zip file"};
NSError *err = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFailedOpenZipFile userInfo:userInfo];
if (error)
{
*error = err;
}
if (completionHandler)
{
completionHandler(nil, NO, err);
}
return NO;
}
NSDictionary * fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:nil];
unsigned long long fileSize = [[fileAttributes objectForKey:NSFileSize] unsignedLongLongValue];
unsigned long long currentPosition = 0;
unz_global_info globalInfo = {};
unzGetGlobalInfo(zip, &globalInfo);
// Begin unzipping
int ret = 0;
ret = unzGoToFirstFile(zip);
if (ret != UNZ_OK && ret != MZ_END_OF_LIST)
{
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"failed to open first file in zip file"};
NSError *err = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:userInfo];
if (error)
{
*error = err;
}
if (completionHandler)
{
completionHandler(nil, NO, err);
}
unzClose(zip);
return NO;
}
BOOL success = YES;
BOOL canceled = NO;
int crc_ret = 0;
unsigned char buffer[4096] = {0};
NSFileManager *fileManager = [NSFileManager defaultManager];
NSMutableArray<NSDictionary *> *directoriesModificationDates = [[NSMutableArray alloc] init];
// Message delegate
if ([delegate respondsToSelector:@selector(zipArchiveWillUnzipArchiveAtPath:zipInfo:)]) {
[delegate zipArchiveWillUnzipArchiveAtPath:path zipInfo:globalInfo];
}
if ([delegate respondsToSelector:@selector(zipArchiveProgressEvent:total:)]) {
[delegate zipArchiveProgressEvent:currentPosition total:fileSize];
}
NSInteger currentFileNumber = -1;
NSError *unzippingError;
do {
currentFileNumber++;
if (ret == MZ_END_OF_LIST) {
break;
}
@autoreleasepool {
if (password.length == 0) {
ret = unzOpenCurrentFile(zip);
} else {
ret = unzOpenCurrentFilePassword(zip, [password cStringUsingEncoding:NSUTF8StringEncoding]);
}
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip file"}];
success = NO;
break;
}
// Reading data and write to file
unz_file_info fileInfo;
memset(&fileInfo, 0, sizeof(unz_file_info));
ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
if (ret != UNZ_OK) {
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
success = NO;
unzCloseCurrentFile(zip);
break;
}
currentPosition += fileInfo.compressed_size;
// Message delegate
if ([delegate respondsToSelector:@selector(zipArchiveShouldUnzipFileAtIndex:totalFiles:archivePath:fileInfo:)]) {
if (![delegate zipArchiveShouldUnzipFileAtIndex:currentFileNumber
totalFiles:(NSInteger)globalInfo.number_entry
archivePath:path
fileInfo:fileInfo]) {
success = NO;
canceled = YES;
break;
}
}
if ([delegate respondsToSelector:@selector(zipArchiveWillUnzipFileAtIndex:totalFiles:archivePath:fileInfo:)]) {
[delegate zipArchiveWillUnzipFileAtIndex:currentFileNumber totalFiles:(NSInteger)globalInfo.number_entry
archivePath:path fileInfo:fileInfo];
}
if ([delegate respondsToSelector:@selector(zipArchiveProgressEvent:total:)]) {
[delegate zipArchiveProgressEvent:(NSInteger)currentPosition total:(NSInteger)fileSize];
}
char *filename = (char *)malloc(fileInfo.size_filename + 1);
if (filename == NULL)
{
success = NO;
break;
}
unzGetCurrentFileInfo(zip, &fileInfo, filename, fileInfo.size_filename + 1, NULL, 0, NULL, 0);
filename[fileInfo.size_filename] = '\0';
BOOL fileIsSymbolicLink = _fileIsSymbolicLink(&fileInfo);
NSString * strPath = [SSZipArchive _filenameStringWithCString:filename
version_made_by:fileInfo.version
general_purpose_flag:fileInfo.flag
size:fileInfo.size_filename];
if ([strPath hasPrefix:@"__MACOSX/"]) {
// ignoring resource forks: https://superuser.com/questions/104500/what-is-macosx-folder
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
free(filename);
continue;
}
// Check if it contains directory
BOOL isDirectory = NO;
if (filename[fileInfo.size_filename-1] == '/' || filename[fileInfo.size_filename-1] == '\\') {
isDirectory = YES;
}
free(filename);
// Sanitize paths in the file name.
strPath = [strPath _sanitizedPath];
if (!strPath.length) {
// if filename data is unsalvageable, we default to currentFileNumber
strPath = @(currentFileNumber).stringValue;
}
NSString *fullPath = [destination stringByAppendingPathComponent:strPath];
NSError *err = nil;
NSDictionary *directoryAttr;
if (preserveAttributes) {
NSDate *modDate = [[self class] _dateWithMSDOSFormat:(UInt32)fileInfo.mz_dos_date];
directoryAttr = @{NSFileCreationDate: modDate, NSFileModificationDate: modDate};
[directoriesModificationDates addObject: @{@"path": fullPath, @"modDate": modDate}];
}
if (isDirectory) {
[fileManager createDirectoryAtPath:fullPath withIntermediateDirectories:YES attributes:directoryAttr error:&err];
} else {
[fileManager createDirectoryAtPath:fullPath.stringByDeletingLastPathComponent withIntermediateDirectories:YES attributes:directoryAttr error:&err];
}
if (err != nil) {
if ([err.domain isEqualToString:NSCocoaErrorDomain] &&
err.code == 640) {
unzippingError = err;
unzCloseCurrentFile(zip);
success = NO;
break;
}
NSLog(@"[SSZipArchive] Error: %@", err.localizedDescription);
}
if ([fileManager fileExistsAtPath:fullPath] && !isDirectory && !overwrite) {
//FIXME: couldBe CRC Check?
unzCloseCurrentFile(zip);
ret = unzGoToNextFile(zip);
continue;
}
if (isDirectory && !fileIsSymbolicLink) {
// nothing to read/write for a directory
} else if (!fileIsSymbolicLink) {
// ensure we are not creating stale file entries
int readBytes = unzReadCurrentFile(zip, buffer, 4096);
if (readBytes >= 0) {
FILE *fp = fopen(fullPath.fileSystemRepresentation, "wb");
while (fp) {
if (readBytes > 0) {
if (0 == fwrite(buffer, readBytes, 1, fp)) {
if (ferror(fp)) {
NSString *message = [NSString stringWithFormat:@"Failed to write file (check your free space)"];
NSLog(@"[SSZipArchive] %@", message);
success = NO;
unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedToWriteFile userInfo:@{NSLocalizedDescriptionKey: message}];
break;
}
}
} else {
break;
}
readBytes = unzReadCurrentFile(zip, buffer, 4096);
if (readBytes < 0) {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
success = NO;
}
}
if (fp) {
fclose(fp);
if (nestedZipLevel
&& [fullPath.pathExtension.lowercaseString isEqualToString:@"zip"]
&& [self unzipFileAtPath:fullPath
toDestination:fullPath.stringByDeletingLastPathComponent
preserveAttributes:preserveAttributes
overwrite:overwrite
nestedZipLevel:nestedZipLevel - 1
password:password
error:nil
delegate:nil
progressHandler:nil
completionHandler:nil]) {
[directoriesModificationDates removeLastObject];
[[NSFileManager defaultManager] removeItemAtPath:fullPath error:nil];
} else if (preserveAttributes) {
// Set the original datetime property
if (fileInfo.mz_dos_date != 0) {
NSDate *orgDate = [[self class] _dateWithMSDOSFormat:(UInt32)fileInfo.mz_dos_date];
NSDictionary *attr = @{NSFileModificationDate: orgDate};
if (attr) {
if (![fileManager setAttributes:attr ofItemAtPath:fullPath error:nil]) {
// Can't set attributes
NSLog(@"[SSZipArchive] Failed to set attributes - whilst setting modification date");
}
}
}
// Set the original permissions on the file (+read/write to solve #293)
uLong permissions = fileInfo.external_fa >> 16 | 0b110000000;
if (permissions != 0) {
// Store it into a NSNumber
NSNumber *permissionsValue = @(permissions);
// Retrieve any existing attributes
NSMutableDictionary *attrs = [[NSMutableDictionary alloc] initWithDictionary:[fileManager attributesOfItemAtPath:fullPath error:nil]];
// Set the value in the attributes dict
[attrs setObject:permissionsValue forKey:NSFilePosixPermissions];
// Update attributes
if (![fileManager setAttributes:attrs ofItemAtPath:fullPath error:nil]) {
// Unable to set the permissions attribute
NSLog(@"[SSZipArchive] Failed to set attributes - whilst setting permissions");
}
}
}
}
else
{
// if we couldn't open file descriptor we can validate global errno to see the reason
int errnoSave = errno;
BOOL isSeriousError = NO;
switch (errnoSave) {
case EISDIR:
// Is a directory
// assumed case
break;
case ENOSPC:
case EMFILE:
// No space left on device
// or
// Too many open files
isSeriousError = YES;
break;
default:
// ignore case
// Just log the error
{
NSError *errorObject = [NSError errorWithDomain:NSPOSIXErrorDomain
code:errnoSave
userInfo:nil];
NSLog(@"[SSZipArchive] Failed to open file on unzipping.(%@)", errorObject);
}
break;
}
if (isSeriousError) {
// serious case
unzippingError = [NSError errorWithDomain:NSPOSIXErrorDomain
code:errnoSave
userInfo:nil];
unzCloseCurrentFile(zip);
// Log the error
NSLog(@"[SSZipArchive] Failed to open file on unzipping.(%@)", unzippingError);
// Break unzipping
success = NO;
break;
}
}
} else {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
success = NO;
break;
}
}
else
{
// Assemble the path for the symbolic link
NSMutableString *destinationPath = [NSMutableString string];
int bytesRead = 0;
while ((bytesRead = unzReadCurrentFile(zip, buffer, 4096)) > 0)
{
buffer[bytesRead] = 0;
[destinationPath appendString:@((const char *)buffer)];
}
if (bytesRead < 0) {
// Let's assume error Z_DATA_ERROR is caused by an invalid password
// Let's assume other errors are caused by Content Not Readable
success = NO;
break;
}
// Check if the symlink exists and delete it if we're overwriting
if (overwrite)
{
if ([fileManager fileExistsAtPath:fullPath])
{
NSError *localError = nil;
BOOL removeSuccess = [fileManager removeItemAtPath:fullPath error:&localError];
if (!removeSuccess)
{
NSString *message = [NSString stringWithFormat:@"Failed to delete existing symbolic link at \"%@\"", localError.localizedDescription];
NSLog(@"[SSZipArchive] %@", message);
success = NO;
unzippingError = [NSError errorWithDomain:SSZipArchiveErrorDomain code:localError.code userInfo:@{NSLocalizedDescriptionKey: message}];
}
}
}
// Create the symbolic link (making sure it stays relative if it was relative before)
int symlinkError = symlink([destinationPath cStringUsingEncoding:NSUTF8StringEncoding],
[fullPath cStringUsingEncoding:NSUTF8StringEncoding]);
if (symlinkError != 0)
{
// Bubble the error up to the completion handler
NSString *message = [NSString stringWithFormat:@"Failed to create symbolic link at \"%@\" to \"%@\" - symlink() error code: %d", fullPath, destinationPath, errno];
NSLog(@"[SSZipArchive] %@", message);
success = NO;
unzippingError = [NSError errorWithDomain:NSPOSIXErrorDomain code:symlinkError userInfo:@{NSLocalizedDescriptionKey: message}];
}
}
crc_ret = unzCloseCurrentFile(zip);
if (crc_ret == MZ_CRC_ERROR) {
// CRC ERROR
success = NO;
break;
}
ret = unzGoToNextFile(zip);
// Message delegate
if ([delegate respondsToSelector:@selector(zipArchiveDidUnzipFileAtIndex:totalFiles:archivePath:fileInfo:)]) {
[delegate zipArchiveDidUnzipFileAtIndex:currentFileNumber totalFiles:(NSInteger)globalInfo.number_entry
archivePath:path fileInfo:fileInfo];
} else if ([delegate respondsToSelector: @selector(zipArchiveDidUnzipFileAtIndex:totalFiles:archivePath:unzippedFilePath:)]) {
[delegate zipArchiveDidUnzipFileAtIndex: currentFileNumber totalFiles: (NSInteger)globalInfo.number_entry
archivePath:path unzippedFilePath: fullPath];
}
if (progressHandler)
{
progressHandler(strPath, fileInfo, currentFileNumber, globalInfo.number_entry);
}
}
} while (ret == UNZ_OK && success);
// Close
unzClose(zip);
// The process of decompressing the .zip archive causes the modification times on the folders
// to be set to the present time. So, when we are done, they need to be explicitly set.
// set the modification date on all of the directories.
if (success && preserveAttributes) {
NSError * err = nil;
for (NSDictionary * d in directoriesModificationDates) {
if (![[NSFileManager defaultManager] setAttributes:@{NSFileModificationDate: [d objectForKey:@"modDate"]} ofItemAtPath:[d objectForKey:@"path"] error:&err]) {
NSLog(@"[SSZipArchive] Set attributes failed for directory: %@.", [d objectForKey:@"path"]);
}
if (err) {
NSLog(@"[SSZipArchive] Error setting directory file modification date attribute: %@", err.localizedDescription);
}
}
}
// Message delegate
if (success && [delegate respondsToSelector:@selector(zipArchiveDidUnzipArchiveAtPath:zipInfo:unzippedPath:)]) {
[delegate zipArchiveDidUnzipArchiveAtPath:path zipInfo:globalInfo unzippedPath:destination];
}
// final progress event = 100%
if (!canceled && [delegate respondsToSelector:@selector(zipArchiveProgressEvent:total:)]) {
[delegate zipArchiveProgressEvent:fileSize total:fileSize];
}
NSError *retErr = nil;
if (crc_ret == MZ_CRC_ERROR)
{
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"crc check failed for file"};
retErr = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:userInfo];
}
if (error) {
if (unzippingError) {
*error = unzippingError;
}
else {
*error = retErr;
}
}
if (completionHandler)
{
if (unzippingError) {
completionHandler(path, success, unzippingError);
}
else
{
completionHandler(path, success, retErr);
}
}
return success;
}
#pragma mark - Zipping
+ (BOOL)createZipFileAtPath:(NSString *)path withFilesAtPaths:(NSArray<NSString *> *)paths
{
return [SSZipArchive createZipFileAtPath:path withFilesAtPaths:paths withPassword:nil];
}
+ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath {
return [SSZipArchive createZipFileAtPath:path withContentsOfDirectory:directoryPath withPassword:nil];
}
+ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath keepParentDirectory:(BOOL)keepParentDirectory {
return [SSZipArchive createZipFileAtPath:path withContentsOfDirectory:directoryPath keepParentDirectory:keepParentDirectory withPassword:nil];
}
+ (BOOL)createZipFileAtPath:(NSString *)path withFilesAtPaths:(NSArray<NSString *> *)paths withPassword:(NSString *)password
{
SSZipArchive *zipArchive = [[SSZipArchive alloc] initWithPath:path];
BOOL success = [zipArchive open];
if (success) {
for (NSString *filePath in paths) {
success &= [zipArchive writeFile:filePath withPassword:password];
}
success &= [zipArchive close];
}
return success;
}
+ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath withPassword:(nullable NSString *)password {
return [SSZipArchive createZipFileAtPath:path withContentsOfDirectory:directoryPath keepParentDirectory:NO withPassword:password];
}
+ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath keepParentDirectory:(BOOL)keepParentDirectory withPassword:(nullable NSString *)password {
return [SSZipArchive createZipFileAtPath:path
withContentsOfDirectory:directoryPath
keepParentDirectory:keepParentDirectory
withPassword:password
andProgressHandler:nil
];
}
+ (BOOL)createZipFileAtPath:(NSString *)path
withContentsOfDirectory:(NSString *)directoryPath
keepParentDirectory:(BOOL)keepParentDirectory
withPassword:(nullable NSString *)password
andProgressHandler:(void(^ _Nullable)(NSUInteger entryNumber, NSUInteger total))progressHandler {
return [self createZipFileAtPath:path withContentsOfDirectory:directoryPath keepParentDirectory:keepParentDirectory compressionLevel:Z_DEFAULT_COMPRESSION password:password AES:YES progressHandler:progressHandler];
}
+ (BOOL)createZipFileAtPath:(NSString *)path
withContentsOfDirectory:(NSString *)directoryPath
keepParentDirectory:(BOOL)keepParentDirectory
compressionLevel:(int)compressionLevel
password:(nullable NSString *)password
AES:(BOOL)aes
progressHandler:(void(^ _Nullable)(NSUInteger entryNumber, NSUInteger total))progressHandler {
SSZipArchive *zipArchive = [[SSZipArchive alloc] initWithPath:path];
BOOL success = [zipArchive open];
if (success) {
// use a local fileManager (queue/thread compatibility)
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSDirectoryEnumerator *dirEnumerator = [fileManager enumeratorAtPath:directoryPath];
NSArray<NSString *> *allObjects = dirEnumerator.allObjects;
NSUInteger total = allObjects.count, complete = 0;
if (keepParentDirectory && !total) {
allObjects = @[@""];
total = 1;
}
for (__strong NSString *fileName in allObjects) {
NSString *fullFilePath = [directoryPath stringByAppendingPathComponent:fileName];
if ([fullFilePath isEqualToString:path]) {
NSLog(@"[SSZipArchive] the archive path and the file path: %@ are the same, which is forbidden.", fullFilePath);
continue;
}
if (keepParentDirectory) {
fileName = [directoryPath.lastPathComponent stringByAppendingPathComponent:fileName];
}
BOOL isDir;
[fileManager fileExistsAtPath:fullFilePath isDirectory:&isDir];
if (!isDir) {
// file
success &= [zipArchive writeFileAtPath:fullFilePath withFileName:fileName compressionLevel:compressionLevel password:password AES:aes];
} else {
// directory
if (![fileManager enumeratorAtPath:fullFilePath].nextObject) {
// empty directory
success &= [zipArchive writeFolderAtPath:fullFilePath withFolderName:fileName withPassword:password];
}
}
if (progressHandler) {
complete++;
progressHandler(complete, total);
}
}
success &= [zipArchive close];
}
return success;
}
// disabling `init` because designated initializer is `initWithPath:`
- (instancetype)init { @throw nil; }
// designated initializer
- (instancetype)initWithPath:(NSString *)path
{
if ((self = [super init])) {
_path = [path copy];
}
return self;
}
- (BOOL)open
{
NSAssert((_zip == NULL), @"Attempting to open an archive which is already open");
_zip = zipOpen(_path.fileSystemRepresentation, APPEND_STATUS_CREATE);
return (NULL != _zip);
}
- (BOOL)writeFolderAtPath:(NSString *)path withFolderName:(NSString *)folderName withPassword:(nullable NSString *)password
{
NSAssert((_zip != NULL), @"Attempting to write to an archive which was never opened");
zip_fileinfo zipInfo = {};
[SSZipArchive zipInfo:&zipInfo setAttributesOfItemAtPath:path];
int error = _zipOpenEntry(_zip, [folderName stringByAppendingString:@"/"], &zipInfo, Z_NO_COMPRESSION, password, NO);
const void *buffer = NULL;
zipWriteInFileInZip(_zip, buffer, 0);
zipCloseFileInZip(_zip);
return error == ZIP_OK;
}
- (BOOL)writeFile:(NSString *)path withPassword:(nullable NSString *)password
{
return [self writeFileAtPath:path withFileName:nil withPassword:password];
}
- (BOOL)writeFileAtPath:(NSString *)path withFileName:(nullable NSString *)fileName withPassword:(nullable NSString *)password
{
return [self writeFileAtPath:path withFileName:fileName compressionLevel:Z_DEFAULT_COMPRESSION password:password AES:YES];
}
// supports writing files with logical folder/directory structure
// *path* is the absolute path of the file that will be compressed
// *fileName* is the relative name of the file how it is stored within the zip e.g. /folder/subfolder/text1.txt
- (BOOL)writeFileAtPath:(NSString *)path withFileName:(nullable NSString *)fileName compressionLevel:(int)compressionLevel password:(nullable NSString *)password AES:(BOOL)aes
{
NSAssert((_zip != NULL), @"Attempting to write to an archive which was never opened");
FILE *input = fopen(path.fileSystemRepresentation, "r");
if (NULL == input) {
return NO;
}
if (!fileName) {
fileName = path.lastPathComponent;
}
zip_fileinfo zipInfo = {};
[SSZipArchive zipInfo:&zipInfo setAttributesOfItemAtPath:path];
void *buffer = malloc(CHUNK);
if (buffer == NULL)
{
fclose(input);
return NO;
}
int error = _zipOpenEntry(_zip, fileName, &zipInfo, compressionLevel, password, aes);
while (!feof(input) && !ferror(input))
{
unsigned int len = (unsigned int) fread(buffer, 1, CHUNK, input);
zipWriteInFileInZip(_zip, buffer, len);
}
zipCloseFileInZip(_zip);
free(buffer);
fclose(input);
return error == ZIP_OK;
}
- (BOOL)writeData:(NSData *)data filename:(nullable NSString *)filename withPassword:(nullable NSString *)password
{
return [self writeData:data filename:filename compressionLevel:Z_DEFAULT_COMPRESSION password:password AES:YES];
}
- (BOOL)writeData:(NSData *)data filename:(nullable NSString *)filename compressionLevel:(int)compressionLevel password:(nullable NSString *)password AES:(BOOL)aes
{
if (!_zip) {
return NO;
}
if (!data) {
return NO;
}
zip_fileinfo zipInfo = {};
[SSZipArchive zipInfo:&zipInfo setDate:[NSDate date]];
int error = _zipOpenEntry(_zip, filename, &zipInfo, compressionLevel, password, aes);
zipWriteInFileInZip(_zip, data.bytes, (unsigned int)data.length);
zipCloseFileInZip(_zip);
return error == ZIP_OK;
}
- (BOOL)close
{
NSAssert((_zip != NULL), @"[SSZipArchive] Attempting to close an archive which was never opened");
int error = zipClose(_zip, NULL);
_zip = nil;
return error == ZIP_OK;
}
#pragma mark - Private
+ (NSString *)_filenameStringWithCString:(const char *)filename
version_made_by:(uint16_t)version_made_by
general_purpose_flag:(uint16_t)flag
size:(uint16_t)size_filename {
// Respect Language encoding flag only reading filename as UTF-8 when this is set
// when file entry created on dos system.
//
// https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
// Bit 11: Language encoding flag (EFS). If this bit is set,
// the filename and comment fields for this file
// MUST be encoded using UTF-8. (see APPENDIX D)
uint16_t made_by = version_made_by >> 8;
BOOL made_on_dos = made_by == 0;
BOOL languageEncoding = (flag & (1 << 11)) != 0;
if (!languageEncoding && made_on_dos) {
// APPNOTE.TXT D.1:
// D.2 If general purpose bit 11 is unset, the file name and comment should conform
// to the original ZIP character encoding. If general purpose bit 11 is set, the
// filename and comment must support The Unicode Standard, Version 4.1.0 or
// greater using the character encoding form defined by the UTF-8 storage
// specification. The Unicode Standard is published by the The Unicode
// Consortium (www.unicode.org). UTF-8 encoded data stored within ZIP files
// is expected to not include a byte order mark (BOM).
// Code Page 437 corresponds to kCFStringEncodingDOSLatinUS
NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingDOSLatinUS);
NSString* strPath = [NSString stringWithCString:filename encoding:encoding];
if (strPath) {
return strPath;
}
}
// attempting unicode encoding
NSString * strPath = @(filename);
if (strPath) {
return strPath;
}
// if filename is non-unicode, detect and transform Encoding
NSData *data = [NSData dataWithBytes:(const void *)filename length:sizeof(unsigned char) * size_filename];
// Testing availability of @available (https://stackoverflow.com/a/46927445/1033581)
#if __clang_major__ < 9
// Xcode 8-
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber10_9_2) {
#else
// Xcode 9+
if (@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)) {
#endif
// supported encodings are in [NSString availableStringEncodings]
[NSString stringEncodingForData:data encodingOptions:nil convertedString:&strPath usedLossyConversion:nil];
} else {
// fallback to a simple manual detect for macOS 10.9 or older
NSArray<NSNumber *> *encodings = @[@(kCFStringEncodingGB_18030_2000), @(kCFStringEncodingShiftJIS)];
for (NSNumber *encoding in encodings) {
strPath = [NSString stringWithCString:filename encoding:(NSStringEncoding)CFStringConvertEncodingToNSStringEncoding(encoding.unsignedIntValue)];
if (strPath) {
break;
}
}
}
if (strPath) {
return strPath;
}
// if filename encoding is non-detected, we default to something based on data
// _hexString is more readable than _base64RFC4648 for debugging unknown encodings
strPath = [data _hexString];
return strPath;
}
+ (void)zipInfo:(zip_fileinfo *)zipInfo setAttributesOfItemAtPath:(NSString *)path
{
NSDictionary *attr = [[NSFileManager defaultManager] attributesOfItemAtPath:path error: nil];
if (attr)
{
NSDate *fileDate = (NSDate *)[attr objectForKey:NSFileModificationDate];
if (fileDate)
{
[self zipInfo:zipInfo setDate:fileDate];
}
// Write permissions into the external attributes, for details on this see here: https://unix.stackexchange.com/a/14727
// Get the permissions value from the files attributes
NSNumber *permissionsValue = (NSNumber *)[attr objectForKey:NSFilePosixPermissions];
if (permissionsValue != nil) {
// Get the short value for the permissions
short permissionsShort = permissionsValue.shortValue;
// Convert this into an octal by adding 010000, 010000 being the flag for a regular file
NSInteger permissionsOctal = 0100000 + permissionsShort;
// Convert this into a long value
uLong permissionsLong = @(permissionsOctal).unsignedLongValue;
// Store this into the external file attributes once it has been shifted 16 places left to form part of the second from last byte
// Casted back to an unsigned int to match type of external_fa in minizip
zipInfo->external_fa = (unsigned int)(permissionsLong << 16L);
}
}
}
+ (void)zipInfo:(zip_fileinfo *)zipInfo setDate:(NSDate *)date
{
NSCalendar *currentCalendar = SSZipArchive._gregorian;
NSCalendarUnit flags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
NSDateComponents *components = [currentCalendar components:flags fromDate:date];
struct tm tmz_date;
tmz_date.tm_sec = (unsigned int)components.second;
tmz_date.tm_min = (unsigned int)components.minute;
tmz_date.tm_hour = (unsigned int)components.hour;
tmz_date.tm_mday = (unsigned int)components.day;
// ISO/IEC 9899 struct tm is 0-indexed for January but NSDateComponents for gregorianCalendar is 1-indexed for January
tmz_date.tm_mon = (unsigned int)components.month - 1;
// ISO/IEC 9899 struct tm is 0-indexed for AD 1900 but NSDateComponents for gregorianCalendar is 1-indexed for AD 1
tmz_date.tm_year = (unsigned int)components.year - 1900;
zipInfo->mz_dos_date = mz_zip_tm_to_dosdate(&tmz_date);
}
+ (NSCalendar *)_gregorian
{
static NSCalendar *gregorian;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
});
return gregorian;
}
// Format from http://newsgroups.derkeiler.com/Archive/Comp/comp.os.msdos.programmer/2009-04/msg00060.html
// Two consecutive words, or a longword, YYYYYYYMMMMDDDDD hhhhhmmmmmmsssss
// YYYYYYY is years from 1980 = 0
// sssss is (seconds/2).
//
// 3658 = 0011 0110 0101 1000 = 0011011 0010 11000 = 27 2 24 = 2007-02-24
// 7423 = 0111 0100 0010 0011 - 01110 100001 00011 = 14 33 3 = 14:33:06
+ (NSDate *)_dateWithMSDOSFormat:(UInt32)msdosDateTime
{
// the whole `_dateWithMSDOSFormat:` method is equivalent but faster than this one line,
// essentially because `mktime` is slow:
//NSDate *date = [NSDate dateWithTimeIntervalSince1970:dosdate_to_time_t(msdosDateTime)];
static const UInt32 kYearMask = 0xFE000000;
static const UInt32 kMonthMask = 0x1E00000;
static const UInt32 kDayMask = 0x1F0000;
static const UInt32 kHourMask = 0xF800;
static const UInt32 kMinuteMask = 0x7E0;
static const UInt32 kSecondMask = 0x1F;
NSAssert(0xFFFFFFFF == (kYearMask | kMonthMask | kDayMask | kHourMask | kMinuteMask | kSecondMask), @"[SSZipArchive] MSDOS date masks don't add up");
NSDateComponents *components = [[NSDateComponents alloc] init];
components.year = 1980 + ((msdosDateTime & kYearMask) >> 25);
components.month = (msdosDateTime & kMonthMask) >> 21;
components.day = (msdosDateTime & kDayMask) >> 16;
components.hour = (msdosDateTime & kHourMask) >> 11;
components.minute = (msdosDateTime & kMinuteMask) >> 5;
components.second = (msdosDateTime & kSecondMask) * 2;
NSDate *date = [self._gregorian dateFromComponents:components];
return date;
}
@end
int _zipOpenEntry(zipFile entry, NSString *name, const zip_fileinfo *zipfi, int level, NSString *password, BOOL aes)
{
// https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
uint16_t made_on_darwin = 19 << 8;
//MZ_ZIP_FLAG_UTF8
uint16_t flag_base = 1 << 11;
return zipOpenNewFileInZip5(entry, name.fileSystemRepresentation, zipfi, NULL, 0, NULL, 0, NULL, Z_DEFLATED, level, 0, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, password.UTF8String, aes, made_on_darwin, flag_base, 1);
}
#pragma mark - Private tools for file info
BOOL _fileIsSymbolicLink(const unz_file_info *fileInfo)
{
//
// Determine whether this is a symbolic link:
// - File is stored with 'version made by' value of UNIX (3),
// as per https://www.pkware.com/documents/casestudies/APPNOTE.TXT
// in the upper byte of the version field.
// - BSD4.4 st_mode constants are stored in the high 16 bits of the
// external file attributes (defacto standard, verified against libarchive)
//
// The original constants can be found here:
// https://minnie.tuhs.org/cgi-bin/utree.pl?file=4.4BSD/usr/include/sys/stat.h
//
const uLong ZipUNIXVersion = 3;
const uLong BSD_SFMT = 0170000;
const uLong BSD_IFLNK = 0120000;
BOOL fileIsSymbolicLink = ((fileInfo->version >> 8) == ZipUNIXVersion) && BSD_IFLNK == (BSD_SFMT & (fileInfo->external_fa >> 16));
return fileIsSymbolicLink;
}
#pragma mark - Private tools for unreadable encodings
@implementation NSData (SSZipArchive)
// `base64EncodedStringWithOptions` uses a base64 alphabet with '+' and '/'.
// we got those alternatives to make it compatible with filenames: https://en.wikipedia.org/wiki/Base64
// * modified Base64 encoding for IMAP mailbox names (RFC 3501): uses '+' and ','
// * modified Base64 for URL and filenames (RFC 4648): uses '-' and '_'
- (NSString *)_base64RFC4648
{
NSString *strName = [self base64EncodedStringWithOptions:0];
strName = [strName stringByReplacingOccurrencesOfString:@"+" withString:@"-"];
strName = [strName stringByReplacingOccurrencesOfString:@"/" withString:@"_"];
return strName;
}
// initWithBytesNoCopy from NSProgrammer, Jan 25 '12: https://stackoverflow.com/a/9009321/1033581
// hexChars from Peter, Aug 19 '14: https://stackoverflow.com/a/25378464/1033581
// not implemented as too lengthy: a potential mapping improvement from Moose, Nov 3 '15: https://stackoverflow.com/a/33501154/1033581
- (NSString *)_hexString
{
const char *hexChars = "0123456789ABCDEF";
NSUInteger length = self.length;
const unsigned char *bytes = self.bytes;
char *chars = malloc(length * 2);
if (chars == NULL) {
// we directly raise an exception instead of using NSAssert to make sure assertion is not disabled as this is irrecoverable
[NSException raise:@"NSInternalInconsistencyException" format:@"failed malloc" arguments:nil];
return nil;
}
char *s = chars;
NSUInteger i = length;
while (i--) {
*s++ = hexChars[*bytes >> 4];
*s++ = hexChars[*bytes & 0xF];
bytes++;
}
NSString *str = [[NSString alloc] initWithBytesNoCopy:chars
length:length * 2
encoding:NSASCIIStringEncoding
freeWhenDone:YES];
return str;
}
@end
#pragma mark Private tools for security
@implementation NSString (SSZipArchive)
// One implementation alternative would be to use the algorithm found at mz_path_resolve from https://github.com/nmoinvaz/minizip/blob/dev/mz_os.c,
// but making sure to work with unichar values and not ascii values to avoid breaking Unicode characters containing 2E ('.') or 2F ('/') in their decomposition
/// Sanitize path traversal characters to prevent directory backtracking. Ignoring these characters mimicks the default behavior of the Unarchiving tool on macOS.
- (NSString *)_sanitizedPath
{
// Change Windows paths to Unix paths: https://en.wikipedia.org/wiki/Path_(computing)
// Possible improvement: only do this if the archive was created on a non-Unix system
NSString *strPath = [self stringByReplacingOccurrencesOfString:@"\\" withString:@"/"];
// Percent-encode file path (where path is defined by https://tools.ietf.org/html/rfc8089)
// The key part is to allow characters "." and "/" and disallow "%".
// CharacterSet.urlPathAllowed seems to do the job
#if (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __WATCH_OS_VERSION_MIN_REQUIRED >= 20000 || __TV_OS_VERSION_MIN_REQUIRED >= 90000)
strPath = [strPath stringByAddingPercentEncodingWithAllowedCharacters:NSCharacterSet.URLPathAllowedCharacterSet];
#else
// Testing availability of @available (https://stackoverflow.com/a/46927445/1033581)
#if __clang_major__ < 9
// Xcode 8-
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber10_8_4) {
#else
// Xcode 9+
if (@available(macOS 10.9, iOS 7.0, watchOS 2.0, tvOS 9.0, *)) {
#endif
strPath = [strPath stringByAddingPercentEncodingWithAllowedCharacters:NSCharacterSet.URLPathAllowedCharacterSet];
} else {
strPath = [strPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}
#endif
// `NSString.stringByAddingPercentEncodingWithAllowedCharacters:` may theorically fail: https://stackoverflow.com/questions/33558933/
// But because we auto-detect encoding using `NSString.stringEncodingForData:encodingOptions:convertedString:usedLossyConversion:`,
// we likely already prevent UTF-16, UTF-32 and invalid Unicode in the form of unpaired surrogate chars: https://stackoverflow.com/questions/53043876/
// To be on the safe side, we will still perform a guard check.
if (strPath == nil) {
return nil;
}
// Add scheme "file:///" to support sanitation on names with a colon like "file:a/../../../usr/bin"
strPath = [@"file:///" stringByAppendingString:strPath];
// Sanitize path traversal characters to prevent directory backtracking. Ignoring these characters mimicks the default behavior of the Unarchiving tool on macOS.
// "../../../../../../../../../../../tmp/test.txt" -> "tmp/test.txt"
// "a/b/../c.txt" -> "a/c.txt"
strPath = [NSURL URLWithString:strPath].standardizedURL.absoluteString;
// Remove the "file:///" scheme
strPath = [strPath substringFromIndex:8];
// Remove the percent-encoding
#if (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __WATCH_OS_VERSION_MIN_REQUIRED >= 20000 || __TV_OS_VERSION_MIN_REQUIRED >= 90000)
strPath = strPath.stringByRemovingPercentEncoding;
#else
// Testing availability of @available (https://stackoverflow.com/a/46927445/1033581)
#if __clang_major__ < 9
// Xcode 8-
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber10_8_4) {
#else
// Xcode 9+
if (@available(macOS 10.9, iOS 7.0, watchOS 2.0, tvOS 9.0, *)) {
#endif
strPath = strPath.stringByRemovingPercentEncoding;
} else {
strPath = [strPath stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}
#endif
return strPath;
}
@end
@implementation SSZipEntry
- (instancetype)initWithPath:(NSString *)path uncompressedSize:(NSUInteger)uncompressedSize {
self = [super init];
if (self != nil) {
_path = path;
_uncompressedSize = uncompressedSize;
}
return self;
}
@end
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