Current File : //usr/share/perl5/vendor_perl/Archive/Zip/Member.pm
package Archive::Zip::Member;
# A generic member of an archive
use strict;
use vars qw( $VERSION @ISA );
BEGIN {
$VERSION = '1.60';
@ISA = qw( Archive::Zip );
if ($^O eq 'MSWin32') {
require Win32;
require Encode;
Encode->import(qw{ decode_utf8 });
}
}
use Archive::Zip qw(
:CONSTANTS
:MISC_CONSTANTS
:ERROR_CODES
:PKZIP_CONSTANTS
:UTILITY_METHODS
);
use Time::Local ();
use Compress::Raw::Zlib qw( Z_OK Z_STREAM_END MAX_WBITS );
use File::Path;
use File::Basename;
# Unix perms for default creation of files/dirs.
use constant DEFAULT_DIRECTORY_PERMISSIONS => 040755;
use constant DEFAULT_FILE_PERMISSIONS => 0100666;
use constant DIRECTORY_ATTRIB => 040000;
use constant FILE_ATTRIB => 0100000;
# Returns self if successful, else undef
# Assumes that fh is positioned at beginning of central directory file header.
# Leaves fh positioned immediately after file header or EOCD signature.
sub _newFromZipFile {
my $class = shift;
my $self = Archive::Zip::ZipFileMember->_newFromZipFile(@_);
return $self;
}
sub newFromString {
my $class = shift;
my ($stringOrStringRef, $fileName);
if (ref($_[0]) eq 'HASH') {
$stringOrStringRef = $_[0]->{string};
$fileName = $_[0]->{zipName};
} else {
($stringOrStringRef, $fileName) = @_;
}
my $self =
Archive::Zip::StringMember->_newFromString($stringOrStringRef, $fileName);
return $self;
}
sub newFromFile {
my $class = shift;
my ($fileName, $zipName);
if (ref($_[0]) eq 'HASH') {
$fileName = $_[0]->{fileName};
$zipName = $_[0]->{zipName};
} else {
($fileName, $zipName) = @_;
}
my $self =
Archive::Zip::NewFileMember->_newFromFileNamed($fileName, $zipName);
return $self;
}
sub newDirectoryNamed {
my $class = shift;
my ($directoryName, $newName);
if (ref($_[0]) eq 'HASH') {
$directoryName = $_[0]->{directoryName};
$newName = $_[0]->{zipName};
} else {
($directoryName, $newName) = @_;
}
my $self =
Archive::Zip::DirectoryMember->_newNamed($directoryName, $newName);
return $self;
}
sub new {
my $class = shift;
my $self = {
'lastModFileDateTime' => 0,
'fileAttributeFormat' => FA_UNIX,
'versionMadeBy' => 20,
'versionNeededToExtract' => 20,
'bitFlag' => ($Archive::Zip::UNICODE ? 0x0800 : 0),
'compressionMethod' => COMPRESSION_STORED,
'desiredCompressionMethod' => COMPRESSION_STORED,
'desiredCompressionLevel' => COMPRESSION_LEVEL_NONE,
'internalFileAttributes' => 0,
'externalFileAttributes' => 0, # set later
'fileName' => '',
'cdExtraField' => '',
'localExtraField' => '',
'fileComment' => '',
'crc32' => 0,
'compressedSize' => 0,
'uncompressedSize' => 0,
'isSymbolicLink' => 0,
'password' => undef, # password for encrypted data
'crc32c' => -1, # crc for decrypted data
@_
};
bless($self, $class);
$self->unixFileAttributes($self->DEFAULT_FILE_PERMISSIONS);
return $self;
}
sub _becomeDirectoryIfNecessary {
my $self = shift;
$self->_become('Archive::Zip::DirectoryMember')
if $self->isDirectory();
return $self;
}
# Morph into given class (do whatever cleanup I need to do)
sub _become {
return bless($_[0], $_[1]);
}
sub versionMadeBy {
shift->{'versionMadeBy'};
}
sub fileAttributeFormat {
my $self = shift;
if (@_) {
$self->{fileAttributeFormat} =
(ref($_[0]) eq 'HASH') ? $_[0]->{format} : $_[0];
} else {
return $self->{fileAttributeFormat};
}
}
sub versionNeededToExtract {
shift->{'versionNeededToExtract'};
}
sub bitFlag {
my $self = shift;
# Set General Purpose Bit Flags according to the desiredCompressionLevel setting
if ( $self->desiredCompressionLevel == 1
|| $self->desiredCompressionLevel == 2) {
$self->{'bitFlag'} |= DEFLATING_COMPRESSION_FAST;
} elsif ($self->desiredCompressionLevel == 3
|| $self->desiredCompressionLevel == 4
|| $self->desiredCompressionLevel == 5
|| $self->desiredCompressionLevel == 6
|| $self->desiredCompressionLevel == 7) {
$self->{'bitFlag'} |= DEFLATING_COMPRESSION_NORMAL;
} elsif ($self->desiredCompressionLevel == 8
|| $self->desiredCompressionLevel == 9) {
$self->{'bitFlag'} |= DEFLATING_COMPRESSION_MAXIMUM;
}
if ($Archive::Zip::UNICODE) {
$self->{'bitFlag'} |= 0x0800;
}
$self->{'bitFlag'};
}
sub password {
my $self = shift;
$self->{'password'} = shift if @_;
$self->{'password'};
}
sub compressionMethod {
shift->{'compressionMethod'};
}
sub desiredCompressionMethod {
my $self = shift;
my $newDesiredCompressionMethod =
(ref($_[0]) eq 'HASH') ? shift->{compressionMethod} : shift;
my $oldDesiredCompressionMethod = $self->{'desiredCompressionMethod'};
if (defined($newDesiredCompressionMethod)) {
$self->{'desiredCompressionMethod'} = $newDesiredCompressionMethod;
if ($newDesiredCompressionMethod == COMPRESSION_STORED) {
$self->{'desiredCompressionLevel'} = 0;
$self->{'bitFlag'} &= ~GPBF_HAS_DATA_DESCRIPTOR_MASK
if $self->uncompressedSize() == 0;
} elsif ($oldDesiredCompressionMethod == COMPRESSION_STORED) {
$self->{'desiredCompressionLevel'} = COMPRESSION_LEVEL_DEFAULT;
}
}
return $oldDesiredCompressionMethod;
}
sub desiredCompressionLevel {
my $self = shift;
my $newDesiredCompressionLevel =
(ref($_[0]) eq 'HASH') ? shift->{compressionLevel} : shift;
my $oldDesiredCompressionLevel = $self->{'desiredCompressionLevel'};
if (defined($newDesiredCompressionLevel)) {
$self->{'desiredCompressionLevel'} = $newDesiredCompressionLevel;
$self->{'desiredCompressionMethod'} = (
$newDesiredCompressionLevel
? COMPRESSION_DEFLATED
: COMPRESSION_STORED
);
}
return $oldDesiredCompressionLevel;
}
sub fileName {
my $self = shift;
my $newName = shift;
if (defined $newName) {
$newName =~ s{[\\/]+}{/}g; # deal with dos/windoze problems
$self->{'fileName'} = $newName;
}
return $self->{'fileName'};
}
sub fileNameAsBytes {
my $self = shift;
my $bytes = $self->{'fileName'};
if($self->{'bitFlag'} & 0x800){
$bytes = Encode::encode_utf8($bytes);
}
return $bytes;
}
sub lastModFileDateTime {
my $modTime = shift->{'lastModFileDateTime'};
$modTime =~ m/^(\d+)$/; # untaint
return $1;
}
sub lastModTime {
my $self = shift;
return _dosToUnixTime($self->lastModFileDateTime());
}
sub setLastModFileDateTimeFromUnix {
my $self = shift;
my $time_t = shift;
$self->{'lastModFileDateTime'} = _unixToDosTime($time_t);
}
sub internalFileAttributes {
shift->{'internalFileAttributes'};
}
sub externalFileAttributes {
shift->{'externalFileAttributes'};
}
# Convert UNIX permissions into proper value for zip file
# Usable as a function or a method
sub _mapPermissionsFromUnix {
my $self = shift;
my $mode = shift;
my $attribs = $mode << 16;
# Microsoft Windows Explorer needs this bit set for directories
if ($mode & DIRECTORY_ATTRIB) {
$attribs |= 16;
}
return $attribs;
# TODO: map more MS-DOS perms
}
# Convert ZIP permissions into Unix ones
#
# This was taken from Info-ZIP group's portable UnZip
# zipfile-extraction program, version 5.50.
# http://www.info-zip.org/pub/infozip/
#
# See the mapattr() function in unix/unix.c
# See the attribute format constants in unzpriv.h
#
# XXX Note that there's one situation that is not implemented
# yet that depends on the "extra field."
sub _mapPermissionsToUnix {
my $self = shift;
my $format = $self->{'fileAttributeFormat'};
my $attribs = $self->{'externalFileAttributes'};
my $mode = 0;
if ($format == FA_AMIGA) {
$attribs = $attribs >> 17 & 7; # Amiga RWE bits
$mode = $attribs << 6 | $attribs << 3 | $attribs;
return $mode;
}
if ($format == FA_THEOS) {
$attribs &= 0xF1FFFFFF;
if (($attribs & 0xF0000000) != 0x40000000) {
$attribs &= 0x01FFFFFF; # not a dir, mask all ftype bits
} else {
$attribs &= 0x41FFFFFF; # leave directory bit as set
}
}
if ( $format == FA_UNIX
|| $format == FA_VAX_VMS
|| $format == FA_ACORN
|| $format == FA_ATARI_ST
|| $format == FA_BEOS
|| $format == FA_QDOS
|| $format == FA_TANDEM) {
$mode = $attribs >> 16;
return $mode if $mode != 0 or not $self->localExtraField;
# warn("local extra field is: ", $self->localExtraField, "\n");
# XXX This condition is not implemented
# I'm just including the comments from the info-zip section for now.
# Some (non-Info-ZIP) implementations of Zip for Unix and
# VMS (and probably others ??) leave 0 in the upper 16-bit
# part of the external_file_attributes field. Instead, they
# store file permission attributes in some extra field.
# As a work-around, we search for the presence of one of
# these extra fields and fall back to the MSDOS compatible
# part of external_file_attributes if one of the known
# e.f. types has been detected.
# Later, we might implement extraction of the permission
# bits from the VMS extra field. But for now, the work-around
# should be sufficient to provide "readable" extracted files.
# (For ASI Unix e.f., an experimental remap from the e.f.
# mode value IS already provided!)
}
# PKWARE's PKZip for Unix marks entries as FA_MSDOS, but stores the
# Unix attributes in the upper 16 bits of the external attributes
# field, just like Info-ZIP's Zip for Unix. We try to use that
# value, after a check for consistency with the MSDOS attribute
# bits (see below).
if ($format == FA_MSDOS) {
$mode = $attribs >> 16;
}
# FA_MSDOS, FA_OS2_HPFS, FA_WINDOWS_NTFS, FA_MACINTOSH, FA_TOPS20
$attribs = !($attribs & 1) << 1 | ($attribs & 0x10) >> 4;
# keep previous $mode setting when its "owner"
# part appears to be consistent with DOS attribute flags!
return $mode if ($mode & 0700) == (0400 | $attribs << 6);
$mode = 0444 | $attribs << 6 | $attribs << 3 | $attribs;
return $mode;
}
sub unixFileAttributes {
my $self = shift;
my $oldPerms = $self->_mapPermissionsToUnix;
my $perms;
if (@_) {
$perms = (ref($_[0]) eq 'HASH') ? $_[0]->{attributes} : $_[0];
if ($self->isDirectory) {
$perms &= ~FILE_ATTRIB;
$perms |= DIRECTORY_ATTRIB;
} else {
$perms &= ~DIRECTORY_ATTRIB;
$perms |= FILE_ATTRIB;
}
$self->{externalFileAttributes} =
$self->_mapPermissionsFromUnix($perms);
}
return $oldPerms;
}
sub localExtraField {
my $self = shift;
if (@_) {
$self->{localExtraField} =
(ref($_[0]) eq 'HASH') ? $_[0]->{field} : $_[0];
} else {
return $self->{localExtraField};
}
}
sub cdExtraField {
my $self = shift;
if (@_) {
$self->{cdExtraField} = (ref($_[0]) eq 'HASH') ? $_[0]->{field} : $_[0];
} else {
return $self->{cdExtraField};
}
}
sub extraFields {
my $self = shift;
return $self->localExtraField() . $self->cdExtraField();
}
sub fileComment {
my $self = shift;
if (@_) {
$self->{fileComment} =
(ref($_[0]) eq 'HASH')
? pack('C0a*', $_[0]->{comment})
: pack('C0a*', $_[0]);
} else {
return $self->{fileComment};
}
}
sub hasDataDescriptor {
my $self = shift;
if (@_) {
my $shouldHave = shift;
if ($shouldHave) {
$self->{'bitFlag'} |= GPBF_HAS_DATA_DESCRIPTOR_MASK;
} else {
$self->{'bitFlag'} &= ~GPBF_HAS_DATA_DESCRIPTOR_MASK;
}
}
return $self->{'bitFlag'} & GPBF_HAS_DATA_DESCRIPTOR_MASK;
}
sub crc32 {
shift->{'crc32'};
}
sub crc32String {
sprintf("%08x", shift->{'crc32'});
}
sub compressedSize {
shift->{'compressedSize'};
}
sub uncompressedSize {
shift->{'uncompressedSize'};
}
sub isEncrypted {
shift->{'bitFlag'} & GPBF_ENCRYPTED_MASK;
}
sub isTextFile {
my $self = shift;
my $bit = $self->internalFileAttributes() & IFA_TEXT_FILE_MASK;
if (@_) {
my $flag = (ref($_[0]) eq 'HASH') ? shift->{flag} : shift;
$self->{'internalFileAttributes'} &= ~IFA_TEXT_FILE_MASK;
$self->{'internalFileAttributes'} |=
($flag ? IFA_TEXT_FILE : IFA_BINARY_FILE);
}
return $bit == IFA_TEXT_FILE;
}
sub isBinaryFile {
my $self = shift;
my $bit = $self->internalFileAttributes() & IFA_TEXT_FILE_MASK;
if (@_) {
my $flag = shift;
$self->{'internalFileAttributes'} &= ~IFA_TEXT_FILE_MASK;
$self->{'internalFileAttributes'} |=
($flag ? IFA_BINARY_FILE : IFA_TEXT_FILE);
}
return $bit == IFA_BINARY_FILE;
}
sub extractToFileNamed {
my $self = shift;
# local FS name
my $name = (ref($_[0]) eq 'HASH') ? $_[0]->{name} : $_[0];
$self->{'isSymbolicLink'} = 0;
# Check if the file / directory is a symbolic link or not
if ($self->{'externalFileAttributes'} == 0xA1FF0000) {
$self->{'isSymbolicLink'} = 1;
$self->{'newName'} = $name;
my ($status, $fh) = _newFileHandle($name, 'r');
my $retval = $self->extractToFileHandle($fh);
$fh->close();
} else {
#return _writeSymbolicLink($self, $name) if $self->isSymbolicLink();
my ($status, $fh);
if ($^O eq 'MSWin32' && $Archive::Zip::UNICODE) {
$name = decode_utf8(Win32::GetFullPathName($name));
mkpath_win32($name);
Win32::CreateFile($name);
($status, $fh) = _newFileHandle(Win32::GetANSIPathName($name), 'w');
} else {
mkpath(dirname($name)); # croaks on error
($status, $fh) = _newFileHandle($name, 'w');
}
return _ioError("Can't open file $name for write") unless $status;
my $retval = $self->extractToFileHandle($fh);
$fh->close();
chmod($self->unixFileAttributes(), $name)
or return _error("Can't chmod() ${name}: $!");
utime($self->lastModTime(), $self->lastModTime(), $name);
return $retval;
}
}
sub mkpath_win32 {
my $path = shift;
use File::Spec;
my ($volume, @path) = File::Spec->splitdir($path);
$path = File::Spec->catfile($volume, shift @path);
pop @path;
while (@path) {
$path = File::Spec->catfile($path, shift @path);
Win32::CreateDirectory($path);
}
}
sub _writeSymbolicLink {
my $self = shift;
my $name = shift;
my $chunkSize = $Archive::Zip::ChunkSize;
#my ( $outRef, undef ) = $self->readChunk($chunkSize);
my $fh;
my $retval = $self->extractToFileHandle($fh);
my ($outRef, undef) = $self->readChunk(100);
}
sub isSymbolicLink {
my $self = shift;
if ($self->{'externalFileAttributes'} == 0xA1FF0000) {
$self->{'isSymbolicLink'} = 1;
} else {
return 0;
}
1;
}
sub isDirectory {
return 0;
}
sub externalFileName {
return undef;
}
# The following are used when copying data
sub _writeOffset {
shift->{'writeOffset'};
}
sub _readOffset {
shift->{'readOffset'};
}
sub writeLocalHeaderRelativeOffset {
shift->{'writeLocalHeaderRelativeOffset'};
}
sub wasWritten { shift->{'wasWritten'} }
sub _dataEnded {
shift->{'dataEnded'};
}
sub _readDataRemaining {
shift->{'readDataRemaining'};
}
sub _inflater {
shift->{'inflater'};
}
sub _deflater {
shift->{'deflater'};
}
# Return the total size of my local header
sub _localHeaderSize {
my $self = shift;
{
use bytes;
return SIGNATURE_LENGTH +
LOCAL_FILE_HEADER_LENGTH +
length($self->fileName()) +
length($self->localExtraField());
}
}
# Return the total size of my CD header
sub _centralDirectoryHeaderSize {
my $self = shift;
{
use bytes;
return SIGNATURE_LENGTH +
CENTRAL_DIRECTORY_FILE_HEADER_LENGTH +
length($self->fileName()) +
length($self->cdExtraField()) +
length($self->fileComment());
}
}
# DOS date/time format
# 0-4 (5) Second divided by 2
# 5-10 (6) Minute (0-59)
# 11-15 (5) Hour (0-23 on a 24-hour clock)
# 16-20 (5) Day of the month (1-31)
# 21-24 (4) Month (1 = January, 2 = February, etc.)
# 25-31 (7) Year offset from 1980 (add 1980 to get actual year)
# Convert DOS date/time format to unix time_t format
# NOT AN OBJECT METHOD!
sub _dosToUnixTime {
my $dt = shift;
return time() unless defined($dt);
my $year = (($dt >> 25) & 0x7f) + 80;
my $mon = (($dt >> 21) & 0x0f) - 1;
my $mday = (($dt >> 16) & 0x1f);
my $hour = (($dt >> 11) & 0x1f);
my $min = (($dt >> 5) & 0x3f);
my $sec = (($dt << 1) & 0x3e);
# catch errors
my $time_t =
eval { Time::Local::timelocal($sec, $min, $hour, $mday, $mon, $year); };
return time() if ($@);
return $time_t;
}
# Note, this is not exactly UTC 1980, it's 1980 + 12 hours and 1
# minute so that nothing timezoney can muck us up.
my $safe_epoch = 31.606060;
# convert a unix time to DOS date/time
# NOT AN OBJECT METHOD!
sub _unixToDosTime {
my $time_t = shift;
unless ($time_t) {
_error("Tried to add member with zero or undef value for time");
$time_t = $safe_epoch;
}
if ($time_t < $safe_epoch) {
_ioError("Unsupported date before 1980 encountered, moving to 1980");
$time_t = $safe_epoch;
}
my ($sec, $min, $hour, $mday, $mon, $year) = localtime($time_t);
my $dt = 0;
$dt += ($sec >> 1);
$dt += ($min << 5);
$dt += ($hour << 11);
$dt += ($mday << 16);
$dt += (($mon + 1) << 21);
$dt += (($year - 80) << 25);
return $dt;
}
sub head {
my ($self, $mode) = (@_, 0);
use bytes;
return pack LOCAL_FILE_HEADER_FORMAT,
$self->versionNeededToExtract(),
$self->{'bitFlag'},
$self->desiredCompressionMethod(),
$self->lastModFileDateTime(),
$self->hasDataDescriptor()
? (0,0,0) # crc, compr & uncompr all zero if data descriptor present
: (
$self->crc32(),
$mode
? $self->_writeOffset() # compressed size
: $self->compressedSize(), # may need to be re-written later
$self->uncompressedSize(),
),
length($self->fileNameAsBytes()),
length($self->localExtraField());
}
# Write my local header to a file handle.
# Stores the offset to the start of the header in my
# writeLocalHeaderRelativeOffset member.
# Returns AZ_OK on success.
sub _writeLocalFileHeader {
my $self = shift;
my $fh = shift;
my $signatureData = pack(SIGNATURE_FORMAT, LOCAL_FILE_HEADER_SIGNATURE);
$self->_print($fh, $signatureData)
or return _ioError("writing local header signature");
my $header = $self->head(1);
$self->_print($fh, $header) or return _ioError("writing local header");
# Check for a valid filename or a filename equal to a literal `0'
if ($self->fileName() || $self->fileName eq '0') {
$self->_print($fh, $self->fileNameAsBytes())
or return _ioError("writing local header filename");
}
if ($self->localExtraField()) {
$self->_print($fh, $self->localExtraField())
or return _ioError("writing local extra field");
}
return AZ_OK;
}
sub _writeCentralDirectoryFileHeader {
my $self = shift;
my $fh = shift;
my $sigData =
pack(SIGNATURE_FORMAT, CENTRAL_DIRECTORY_FILE_HEADER_SIGNATURE);
$self->_print($fh, $sigData)
or return _ioError("writing central directory header signature");
my ($fileNameLength, $extraFieldLength, $fileCommentLength);
{
use bytes;
$fileNameLength = length($self->fileNameAsBytes());
$extraFieldLength = length($self->cdExtraField());
$fileCommentLength = length($self->fileComment());
}
my $header = pack(
CENTRAL_DIRECTORY_FILE_HEADER_FORMAT,
$self->versionMadeBy(),
$self->fileAttributeFormat(),
$self->versionNeededToExtract(),
$self->bitFlag(),
$self->desiredCompressionMethod(),
$self->lastModFileDateTime(),
$self->crc32(), # these three fields should have been updated
$self->_writeOffset(), # by writing the data stream out
$self->uncompressedSize(), #
$fileNameLength,
$extraFieldLength,
$fileCommentLength,
0, # {'diskNumberStart'},
$self->internalFileAttributes(),
$self->externalFileAttributes(),
$self->writeLocalHeaderRelativeOffset());
$self->_print($fh, $header)
or return _ioError("writing central directory header");
if ($fileNameLength) {
$self->_print($fh, $self->fileNameAsBytes())
or return _ioError("writing central directory header signature");
}
if ($extraFieldLength) {
$self->_print($fh, $self->cdExtraField())
or return _ioError("writing central directory extra field");
}
if ($fileCommentLength) {
$self->_print($fh, $self->fileComment())
or return _ioError("writing central directory file comment");
}
return AZ_OK;
}
# This writes a data descriptor to the given file handle.
# Assumes that crc32, writeOffset, and uncompressedSize are
# set correctly (they should be after a write).
# Further, the local file header should have the
# GPBF_HAS_DATA_DESCRIPTOR_MASK bit set.
sub _writeDataDescriptor {
my $self = shift;
my $fh = shift;
my $header = pack(
SIGNATURE_FORMAT . DATA_DESCRIPTOR_FORMAT,
DATA_DESCRIPTOR_SIGNATURE,
$self->crc32(),
$self->_writeOffset(), # compressed size
$self->uncompressedSize());
$self->_print($fh, $header)
or return _ioError("writing data descriptor");
return AZ_OK;
}
# Re-writes the local file header with new crc32 and compressedSize fields.
# To be called after writing the data stream.
# Assumes that filename and extraField sizes didn't change since last written.
sub _refreshLocalFileHeader {
my $self = shift;
my $fh = shift;
my $here = $fh->tell();
$fh->seek($self->writeLocalHeaderRelativeOffset() + SIGNATURE_LENGTH,
IO::Seekable::SEEK_SET)
or return _ioError("seeking to rewrite local header");
my $header = $self->head(1);
$self->_print($fh, $header)
or return _ioError("re-writing local header");
$fh->seek($here, IO::Seekable::SEEK_SET)
or return _ioError("seeking after rewrite of local header");
return AZ_OK;
}
sub readChunk {
my $self = shift;
my $chunkSize = (ref($_[0]) eq 'HASH') ? $_[0]->{chunkSize} : $_[0];
if ($self->readIsDone()) {
$self->endRead();
my $dummy = '';
return (\$dummy, AZ_STREAM_END);
}
$chunkSize = $Archive::Zip::ChunkSize if not defined($chunkSize);
$chunkSize = $self->_readDataRemaining()
if $chunkSize > $self->_readDataRemaining();
my $buffer = '';
my $outputRef;
my ($bytesRead, $status) = $self->_readRawChunk(\$buffer, $chunkSize);
return (\$buffer, $status) unless $status == AZ_OK;
$buffer && $self->isEncrypted and $buffer = $self->_decode($buffer);
$self->{'readDataRemaining'} -= $bytesRead;
$self->{'readOffset'} += $bytesRead;
if ($self->compressionMethod() == COMPRESSION_STORED) {
$self->{'crc32'} = $self->computeCRC32($buffer, $self->{'crc32'});
}
($outputRef, $status) = &{$self->{'chunkHandler'}}($self, \$buffer);
$self->{'writeOffset'} += length($$outputRef);
$self->endRead()
if $self->readIsDone();
return ($outputRef, $status);
}
# Read the next raw chunk of my data. Subclasses MUST implement.
# my ( $bytesRead, $status) = $self->_readRawChunk( \$buffer, $chunkSize );
sub _readRawChunk {
my $self = shift;
return $self->_subclassResponsibility();
}
# A place holder to catch rewindData errors if someone ignores
# the error code.
sub _noChunk {
my $self = shift;
return (\undef, _error("trying to copy chunk when init failed"));
}
# Basically a no-op so that I can have a consistent interface.
# ( $outputRef, $status) = $self->_copyChunk( \$buffer );
sub _copyChunk {
my ($self, $dataRef) = @_;
return ($dataRef, AZ_OK);
}
# ( $outputRef, $status) = $self->_deflateChunk( \$buffer );
sub _deflateChunk {
my ($self, $buffer) = @_;
my ($status) = $self->_deflater()->deflate($buffer, my $out);
if ($self->_readDataRemaining() == 0) {
my $extraOutput;
($status) = $self->_deflater()->flush($extraOutput);
$out .= $extraOutput;
$self->endRead();
return (\$out, AZ_STREAM_END);
} elsif ($status == Z_OK) {
return (\$out, AZ_OK);
} else {
$self->endRead();
my $retval = _error('deflate error', $status);
my $dummy = '';
return (\$dummy, $retval);
}
}
# ( $outputRef, $status) = $self->_inflateChunk( \$buffer );
sub _inflateChunk {
my ($self, $buffer) = @_;
my ($status) = $self->_inflater()->inflate($buffer, my $out);
my $retval;
$self->endRead() unless $status == Z_OK;
if ($status == Z_OK || $status == Z_STREAM_END) {
$retval = ($status == Z_STREAM_END) ? AZ_STREAM_END : AZ_OK;
return (\$out, $retval);
} else {
$retval = _error('inflate error', $status);
my $dummy = '';
return (\$dummy, $retval);
}
}
sub rewindData {
my $self = shift;
my $status;
# set to trap init errors
$self->{'chunkHandler'} = $self->can('_noChunk');
# Work around WinZip bug with 0-length DEFLATED files
$self->desiredCompressionMethod(COMPRESSION_STORED)
if $self->uncompressedSize() == 0;
# assume that we're going to read the whole file, and compute the CRC anew.
$self->{'crc32'} = 0
if ($self->compressionMethod() == COMPRESSION_STORED);
# These are the only combinations of methods we deal with right now.
if ( $self->compressionMethod() == COMPRESSION_STORED
and $self->desiredCompressionMethod() == COMPRESSION_DEFLATED) {
($self->{'deflater'}, $status) = Compress::Raw::Zlib::Deflate->new(
'-Level' => $self->desiredCompressionLevel(),
'-WindowBits' => -MAX_WBITS(), # necessary magic
'-Bufsize' => $Archive::Zip::ChunkSize,
@_
); # pass additional options
return _error('deflateInit error:', $status)
unless $status == Z_OK;
$self->{'chunkHandler'} = $self->can('_deflateChunk');
} elsif ($self->compressionMethod() == COMPRESSION_DEFLATED
and $self->desiredCompressionMethod() == COMPRESSION_STORED) {
($self->{'inflater'}, $status) = Compress::Raw::Zlib::Inflate->new(
'-WindowBits' => -MAX_WBITS(), # necessary magic
'-Bufsize' => $Archive::Zip::ChunkSize,
@_
); # pass additional options
return _error('inflateInit error:', $status)
unless $status == Z_OK;
$self->{'chunkHandler'} = $self->can('_inflateChunk');
} elsif ($self->compressionMethod() == $self->desiredCompressionMethod()) {
$self->{'chunkHandler'} = $self->can('_copyChunk');
} else {
return _error(
sprintf(
"Unsupported compression combination: read %d, write %d",
$self->compressionMethod(),
$self->desiredCompressionMethod()));
}
$self->{'readDataRemaining'} =
($self->compressionMethod() == COMPRESSION_STORED)
? $self->uncompressedSize()
: $self->compressedSize();
$self->{'dataEnded'} = 0;
$self->{'readOffset'} = 0;
return AZ_OK;
}
sub endRead {
my $self = shift;
delete $self->{'inflater'};
delete $self->{'deflater'};
$self->{'dataEnded'} = 1;
$self->{'readDataRemaining'} = 0;
return AZ_OK;
}
sub readIsDone {
my $self = shift;
return ($self->_dataEnded() or !$self->_readDataRemaining());
}
sub contents {
my $self = shift;
my $newContents = shift;
if (defined($newContents)) {
# change our type and call the subclass contents method.
$self->_become('Archive::Zip::StringMember');
return $self->contents(pack('C0a*', $newContents)); # in case of Unicode
} else {
my $oldCompression =
$self->desiredCompressionMethod(COMPRESSION_STORED);
my $status = $self->rewindData(@_);
if ($status != AZ_OK) {
$self->endRead();
return $status;
}
my $retval = '';
while ($status == AZ_OK) {
my $ref;
($ref, $status) = $self->readChunk($self->_readDataRemaining());
# did we get it in one chunk?
if (length($$ref) == $self->uncompressedSize()) {
$retval = $$ref;
} else {
$retval .= $$ref
}
}
$self->desiredCompressionMethod($oldCompression);
$self->endRead();
$status = AZ_OK if $status == AZ_STREAM_END;
$retval = undef unless $status == AZ_OK;
return wantarray ? ($retval, $status) : $retval;
}
}
sub extractToFileHandle {
my $self = shift;
my $fh = (ref($_[0]) eq 'HASH') ? shift->{fileHandle} : shift;
_binmode($fh);
my $oldCompression = $self->desiredCompressionMethod(COMPRESSION_STORED);
my $status = $self->rewindData(@_);
$status = $self->_writeData($fh) if $status == AZ_OK;
$self->desiredCompressionMethod($oldCompression);
$self->endRead();
return $status;
}
# write local header and data stream to file handle
sub _writeToFileHandle {
my $self = shift;
my $fh = shift;
my $fhIsSeekable = shift;
my $offset = shift;
return _error("no member name given for $self")
if $self->fileName() eq '';
$self->{'writeLocalHeaderRelativeOffset'} = $offset;
$self->{'wasWritten'} = 0;
# Determine if I need to write a data descriptor
# I need to do this if I can't refresh the header
# and I don't know compressed size or crc32 fields.
my $headerFieldsUnknown = (
($self->uncompressedSize() > 0)
and ($self->compressionMethod() == COMPRESSION_STORED
or $self->desiredCompressionMethod() == COMPRESSION_DEFLATED));
my $shouldWriteDataDescriptor =
($headerFieldsUnknown and not $fhIsSeekable);
$self->hasDataDescriptor(1)
if ($shouldWriteDataDescriptor);
$self->{'writeOffset'} = 0;
my $status = $self->rewindData();
($status = $self->_writeLocalFileHeader($fh))
if $status == AZ_OK;
($status = $self->_writeData($fh))
if $status == AZ_OK;
if ($status == AZ_OK) {
$self->{'wasWritten'} = 1;
if ($self->hasDataDescriptor()) {
$status = $self->_writeDataDescriptor($fh);
} elsif ($headerFieldsUnknown) {
$status = $self->_refreshLocalFileHeader($fh);
}
}
return $status;
}
# Copy my (possibly compressed) data to given file handle.
# Returns C<AZ_OK> on success
sub _writeData {
my $self = shift;
my $writeFh = shift;
# If symbolic link, just create one if the operating system is Linux, Unix, BSD or VMS
# TODO: Add checks for other operating systems
if ($self->{'isSymbolicLink'} == 1 && $^O eq 'linux') {
my $chunkSize = $Archive::Zip::ChunkSize;
my ($outRef, $status) = $self->readChunk($chunkSize);
symlink $$outRef, $self->{'newName'};
} else {
return AZ_OK if ($self->uncompressedSize() == 0);
my $status;
my $chunkSize = $Archive::Zip::ChunkSize;
while ($self->_readDataRemaining() > 0) {
my $outRef;
($outRef, $status) = $self->readChunk($chunkSize);
return $status if ($status != AZ_OK and $status != AZ_STREAM_END);
if (length($$outRef) > 0) {
$self->_print($writeFh, $$outRef)
or return _ioError("write error during copy");
}
last if $status == AZ_STREAM_END;
}
}
return AZ_OK;
}
# Return true if I depend on the named file
sub _usesFileNamed {
return 0;
}
# ##############################################################################
#
# Decrypt section
#
# H.Merijn Brand (Tux) 2011-06-28
#
# ##############################################################################
# This code is derived from the crypt source of unzip-6.0 dated 05 Jan 2007
# Its license states:
#
# --8<---
# Copyright (c) 1990-2007 Info-ZIP. All rights reserved.
# See the accompanying file LICENSE, version 2005-Feb-10 or later
# (the contents of which are also included in (un)zip.h) for terms of use.
# If, for some reason, all these files are missing, the Info-ZIP license
# also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
#
# crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
# The main encryption/decryption source code for Info-Zip software was
# originally written in Europe. To the best of our knowledge, it can
# be freely distributed in both source and object forms from any country,
# including the USA under License Exception TSU of the U.S. Export
# Administration Regulations (section 740.13(e)) of 6 June 2002.
# NOTE on copyright history:
# Previous versions of this source package (up to version 2.8) were
# not copyrighted and put in the public domain. If you cannot comply
# with the Info-Zip LICENSE, you may want to look for one of those
# public domain versions.
#
# This encryption code is a direct transcription of the algorithm from
# Roger Schlafly, described by Phil Katz in the file appnote.txt. This
# file (appnote.txt) is distributed with the PKZIP program (even in the
# version without encryption capabilities).
# -->8---
# As of January 2000, US export regulations were amended to allow export
# of free encryption source code from the US. As of June 2002, these
# regulations were further relaxed to allow export of encryption binaries
# associated with free encryption source code. The Zip 2.31, UnZip 5.52
# and Wiz 5.02 archives now include full crypto source code. As of the
# Zip 2.31 release, all official binaries include encryption support; the
# former "zcr" archives ceased to exist.
# (Note that restrictions may still exist in other countries, of course.)
# For now, we just support the decrypt stuff
# All below methods are supposed to be private
# use Data::Peek;
my @keys;
my @crct = do {
my $xor = 0xedb88320;
my @crc = (0) x 1024;
# generate a crc for every 8-bit value
foreach my $n (0 .. 255) {
my $c = $n;
$c = $c & 1 ? $xor ^ ($c >> 1) : $c >> 1 for 1 .. 8;
$crc[$n] = _revbe($c);
}
# generate crc for each value followed by one, two, and three zeros */
foreach my $n (0 .. 255) {
my $c = ($crc[($crc[$n] >> 24) ^ 0] ^ ($crc[$n] << 8)) & 0xffffffff;
$crc[$_ * 256 + $n] = $c for 1 .. 3;
}
map { _revbe($crc[$_]) } 0 .. 1023;
};
sub _crc32 {
my ($c, $b) = @_;
return ($crct[($c ^ $b) & 0xff] ^ ($c >> 8));
} # _crc32
sub _revbe {
my $w = shift;
return (($w >> 24) +
(($w >> 8) & 0xff00) +
(($w & 0xff00) << 8) +
(($w & 0xff) << 24));
} # _revbe
sub _update_keys {
use integer;
my $c = shift; # signed int
$keys[0] = _crc32($keys[0], $c);
$keys[1] = (($keys[1] + ($keys[0] & 0xff)) * 0x08088405 + 1) & 0xffffffff;
my $keyshift = $keys[1] >> 24;
$keys[2] = _crc32($keys[2], $keyshift);
} # _update_keys
sub _zdecode ($) {
my $c = shift;
my $t = ($keys[2] & 0xffff) | 2;
_update_keys($c ^= ((($t * ($t ^ 1)) >> 8) & 0xff));
return $c;
} # _zdecode
sub _decode {
my $self = shift;
my $buff = shift;
$self->isEncrypted or return $buff;
my $pass = $self->password;
defined $pass or return "";
@keys = (0x12345678, 0x23456789, 0x34567890);
_update_keys($_) for unpack "C*", $pass;
# DDumper { uk => [ @keys ] };
my $head = substr $buff, 0, 12, "";
my @head = map { _zdecode($_) } unpack "C*", $head;
my $x =
$self->{externalFileAttributes}
? ($self->{lastModFileDateTime} >> 8) & 0xff
: $self->{crc32} >> 24;
$head[-1] == $x or return ""; # Password fail
# Worth checking ...
$self->{crc32c} = (unpack LOCAL_FILE_HEADER_FORMAT, pack "C*", @head)[3];
# DHexDump ($buff);
$buff = pack "C*" => map { _zdecode($_) } unpack "C*" => $buff;
# DHexDump ($buff);
return $buff;
} # _decode
1;
Mini Shell