#PKWARE ZIP FILE FORMAT .EXE#
#PKWARE ZIP FILE FORMAT ARCHIVE#
#PKWARE ZIP FILE FORMAT CODE#
#PKWARE ZIP FILE FORMAT PASSWORD#

Encrypting a 16meg file on the C# version takes 2-3 Seconds, the same file on the Java version takes 2-3 minutes. I don't know why but the C# version performs much (really loads) better than the java version when encryption is involved. apart from that the two libraries are pretty similar. This meant a lot of & 0xFFFF etc style bit masking. UInt16 (2 byte) in java is replaced with long (4 bytes). in places I have just used the signed equivalents (this is pretty dangerous) and in others I have used the signed version up i.e.

You can see from the source that the C# version is a lot easier to write/code than the Java version as it uses properties instead of getter and setter methods (yes I know the CLR uses getters and setters in the background!! but that's hidden from me in c# yeah!!)ДЄlso Java does not support unsigned data types, which to be honest was a bit of a pain. Those files can have different compression methods and passwords to other files. Note the Add File (file) method can be called multiple times to add as many file to the ZIP File as you like. the file will be compressed using the deflate algorithm (note this is the only algorithm the library supports) and the file will also be encrypted with the supplied password.ДЇileEntry file = new FileEntry( 'D:\text.txt', 'HARPER',Method.Deflated)

#PKWARE ZIP FILE FORMAT PASSWORD#

the file will be compressed using the deflate algorithm (note this is the only algorithm the library supports)ДЇileEntry file = new FileEntry( 'D:\text.txt',Method.Deflated) Д¬reating a ZIP file with one file in it, using deflate compression and encrypted with a password Add the FileEntry object to the ZIPFile objectД¬reating a ZIP file with one file in it, using Deflate compression without a password. the file will NOT be compressed or have a passwordДЇileEntry file = new FileEntry( ' D:\text.txt' ,Method.Stored) Creates a FileEntry object that represents the file D:\text.txt ZIPFile zip = new ZIPFile( 'D:\myfirstZip.zip') Creates a ZipFile object that will ultimately be saved at D:\myfirstZip.zip This is controlled by the constructor called to create the File Entry.Д¬reating a ZIP file with one file in it, using Stored (i.e. The File Entry can be stored as is, compressed, as is encrypted, compressed encrypted.

text files, jpegs anything (I think.).ДЇile Entry: This object represents a file stored inside a ZIP File.

ZIP File: This object represents a ZIP file, which can contain one or more other files (i.e. There are only really two main classes on interest:

#PKWARE ZIP FILE FORMAT CODE#

You can, however, run a split PKSFX file, consisting of multiple segments, if each segment is no larger than 2 GB.This article provides the source code for creating zip files in C# and Java. If you create an unsplit PKSFX file larger than 2 GB, you probably will not be able to run it. This is the largest size executable that Windows and most other operating systems can load. Practically speaking, the maximum size of a PKSFX file is 2 GB.

#PKWARE ZIP FILE FORMAT ARCHIVE#

When the archive is run to extract, its files are decrypted in FIPS 140 mode as well. Note: When you encrypt files for an SFX archive with FIPS 140 mode turned on in Security options, allows you to choose only FIPS-validated algorithms for the encryption. (A PKSFX file that you create as a copy of an existing PKSFX file gets its options from the original file, not from the settings on the PKSFX page. The options you set on this page apply to any new PKSFX files that you create. Set options on the PKSFX page of Compression options. You can set options for PKSFX files just as you can for compressing or extracting.

#PKWARE ZIP FILE FORMAT .EXE#

exe file instead of as a ZIP file or other archive type.

The only difference is that, when you are done adding files, you save the archive as a PKSFX. (PKSFX archives are also called SFX files, for short.)Д¬reate a PKSFX archive in exactly the same way that you create an ordinary archive. zip, for instance), and it can be extracted just by executing it, even by someone who does not have or another ZIP utility. When that happens, you can send a self-extracting PKSFX archive instead: it has a. Though less common a situation than it once was, occasionally you'll send a ZIP archive to someone whose computer cannot open the file.

Pkware zip file format