CRC of The Zone doesn't match the one from WinZIP?

andreas · 05 November 2001, 22:47

Hi,

since I'm a notorious non-believer ever since

, I just checked if the CRC calculation on EAB was actually correct. I can't blatantly exclaim "it wasn't" for I don't know why it differs because I'd like to consider that the algorithm WinZIP uses for calculating might be a completely different one.
I also checked with another CRC tool and the result was the same as the CRC calculated by WinZIP.

This smells like a bug in the algorithm. RCK?

//Edit: CRC's for current files on the zone: (<-WinZIP)
Hell Run Machine (fixed) - 9da2b970
Cricket Captain - 12a4fde5

Ian · 06 November 2001, 00:00

First of all, I know jack shit about CRC32's.

But maybe the CRC in the zone is of the zip file itself, not the ADF inside it.

andreas · 06 November 2001, 02:14

Perhaps. But then it would really make no sense at all...

Twistin'Ghost · 06 November 2001, 03:34

I would think that the CRC32 value should be in the contents of the zip, but what happens when a zip contains 4 adf's? Or an LHA or LZX or DMS Or (heaven forbid) ADZ?

RCK · 06 November 2001, 12:10

Yep, the CRC32 of the zone is only for the file uploaded.
so if you upload one ADF, you will have his correct crc32, but if you upload a zip, you will have the zip crc32

@andreas: Yes I know, but my server won't start to unzip / unace each file to check his crc32 ! lol

RCK · 06 November 2001, 12:18

wait wait,

I will look if I can unzipping files "on the fly" with php, and do crc32 operation in it...

RCK · 06 November 2001, 12:47

okay, the fonctions for reading contents of zip (and then maybe check the CRC of the files) are not yet implemented in the stable version (4.0.6).

So I will have to wait the 4.1.0 one in order to code that

RCK · 06 November 2001, 12:50

Quote:

Originally posted by andreas
//Edit: CRC's for current files on the zone: (<-WinZIP)
Hell Run Machine (fixed) - 9da2b970
Cricket Captain - 12a4fde5

check the CRC32 of "SpaceBalls - State Of The Art.adf" and you will see it is correct

(in the zone: 9ad306a3)

andreas · 06 November 2001, 14:36

Well I blindly believe you that this is correct as it is.

But alas, the only way out is actually to wait for support of the inside-zip thing in PHP, BECAUSE otherwise everyone wanting to give others an occasion to check their CRC first (i. e. if he/she has this game version already or not) would have to upload the game in PLAIN ADF format, uncompressed, that is!
And this would really be silly! I don't want to imagine how long it will take until the 50 MB disk space on the zone is exhausted.

Argh. A loud and clear "no" from my point of view.

RCK · 06 November 2001, 18:12

Yep I know.
I'll try to find another solution.

MethodGit · 16 November 2001, 20:45

Quote:

Originally posted by andreas
I don't want to imagine how long it will take until the 50 MB disk space on the zone is exhausted.

How do you know the Zone has a limit of 50MB, then?

RCK · 16 November 2001, 21:07

euh...

cause I said it in another thread.
you can see the amount of data at the very end of the zone page.

RCK · 16 November 2001, 22:13

Shiiiiiiiiiiiiiiit :disgusted

During the EAB's update of this afternoon, I have lost the last version of "the zone"...

The CRC calculation isn't working anymore.
ok, it is not really important cause it was useless, but it's just boring me

Well, I will re-code it when I will be able to read into the zip files "on the fly", and get the crc32 of the files.

andreas · 17 November 2001, 11:41

Sounds good.

05 November 2001, 22:47	#1
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	CRC of The Zone doesn't match the one from WinZIP? Hi, since I'm a notorious non-believer ever since , I just checked if the CRC calculation on EAB was actually correct. I can't blatantly exclaim "it wasn't" for I don't know why it differs because I'd like to consider that the algorithm WinZIP uses for calculating might be a completely different one. I also checked with another CRC tool and the result was the same as the CRC calculated by WinZIP. This smells like a bug in the algorithm. RCK? //Edit: CRC's for current files on the zone: (<-WinZIP) Hell Run Machine (fixed) - 9da2b970 Cricket Captain - 12a4fde5 Last edited by andreas; 05 November 2001 at 23:02.

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06 November 2001, 00:00	#2
Ian Global Moderator Join Date: May 2001 Location: Derby, UK Age: 46 Posts: 2,287	First of all, I know jack shit about CRC32's. But maybe the CRC in the zone is of the zip file itself, not the ADF inside it.

06 November 2001, 02:14	#3
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Perhaps. But then it would really make no sense at all...

06 November 2001, 03:34	#4
Twistin'Ghost Give up the ghost Join Date: Apr 2001 Location: U$A Age: 33 Posts: 4,662	I would think that the CRC32 value should be in the contents of the zip, but what happens when a zip contains 4 adf's? Or an LHA or LZX or DMS Or (heaven forbid) ADZ?

06 November 2001, 12:10	#5
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	Yep, the CRC32 of the zone is only for the file uploaded. so if you upload one ADF, you will have his correct crc32, but if you upload a zip, you will have the zip crc32 @andreas: Yes I know, but my server won't start to unzip / unace each file to check his crc32 ! lol

06 November 2001, 12:18	#6
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	wait wait, I will look if I can unzipping files "on the fly" with php, and do crc32 operation in it...

06 November 2001, 12:47	#7
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	okay, the fonctions for reading contents of zip (and then maybe check the CRC of the files) are not yet implemented in the stable version (4.0.6). So I will have to wait the 4.1.0 one in order to code that

06 November 2001, 14:36	#9
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Well I blindly believe you that this is correct as it is. But alas, the only way out is actually to wait for support of the inside-zip thing in PHP, BECAUSE otherwise everyone wanting to give others an occasion to check their CRC first (i. e. if he/she has this game version already or not) would have to upload the game in PLAIN ADF format, uncompressed, that is! And this would really be silly! I don't want to imagine how long it will take until the 50 MB disk space on the zone is exhausted. Argh. A loud and clear "no" from my point of view.

06 November 2001, 18:12	#10
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	Yep I know. I'll try to find another solution.

16 November 2001, 21:07	#12
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	euh... cause I said it in another thread. you can see the amount of data at the very end of the zone page.

16 November 2001, 22:13	#13
RCK Administrator Join Date: Feb 2001 Location: Paris / France Age: 45 Posts: 3,084	Shiiiiiiiiiiiiiiit :disgusted During the EAB's update of this afternoon, I have lost the last version of "the zone"... The CRC calculation isn't working anymore. ok, it is not really important cause it was useless, but it's just boring me Well, I will re-code it when I will be able to read into the zip files "on the fly", and get the crc32 of the files.

17 November 2001, 11:41	#14
andreas Zone Friend Join Date: Jun 2001 Location: Germany Age: 50 Posts: 5,857	Sounds good.

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