[Mldonkey-bugs] [Bug #2475] MD4 mismatch on downloaded files

[nobody]

=================== BUG #2475: LATEST MODIFICATIONS ==================
http://savannah.nongnu.org/bugs/?func=detailbug&bug_id=2475&group_id=1409

Changes by: Anonymous user        Date: 2003-Feb-10 13:28

------------------ Additional Follow-up Comments ----------------------------
Ohh.  I didn't know the files was doubly hashed.  Feel free to close this bug, 
and thanks for enlightenting me.



=================== BUG #2475: FULL BUG SNAPSHOT ===================


Submitted by: None                    Project: mldonkey, a free e-Donkey client
Submitted on: 2003-Feb-04 17:19
Category:  eDonkey-plugin             Severity:  5 - Major                  
Bug Group:  None                      Resolution:  None                     
Assigned to:  None                    Status:  Open                         
Release:  2.00                        Release:  2.02-0                      
Platform Version:  Linux i386-i686    Binaries Origin:  Downloaded from Savannah

Summary:  MD4 mismatch on downloaded files

Original Submission:  I'm having problems with consistency errors on my 
downloaded
files. For example, I started download of a file with the MD4 
1FCB09AA0D9BC90528CF1DF208DAA07A, and with a size of 59161588 bytes. The web 
interface claims that the download of this file is completed, but strangely 
enough, a quick MD4 verification fails.

Both perl's Digest::MD4 and the libmd C library reports the file to have a 
checksum of 712213d55baef112c28ee633c57caa50.

However, this doesn't happen with all files, small files are usually OK, while 
large files very often is corrupted.

Is there anything known that may cause or remedy this problem?

Follow-up Comments
*******************

-------------------------------------------------------
Date: 2003-Feb-10 13:28             By: None
Ohh.  I didn't know the files was doubly hashed.  Feel free to close this bug, 
and thanks for enlightenting me.

-------------------------------------------------------
Date: 2003-Feb-07 02:56             By: None
You may have noticed that noone else seems to have this problem. The reason can 
be found in the mailing list archives at 
http://mail.gnu.org/archive/html/mldonkey-users. Just do a search for 'md4'. 

If you want to calculate the file MD4 you can use a tool like ed2k_hash, which 
can be found at http://users.aber.ac.uk/tpm01/ed2k_tools. 

-------------------------------------------------------
Date: 2003-Feb-06 17:05             By: None
Some statistics:

~/mldonkey/incoming/tmp$ for file in *; do if test "`echo $file | tr 
'[:upper:]' '[:lower:]'`" = "`md4 $file`" ; then echo -n "$file [`stat $file | 
awk '/Size/ { print $2 }'`]"; echo \ OK ; else ; echo -n "$file [`stat $file | 
awk '/Size/ { print $2 }'`]"; echo \ FAILED ; fi ; done
12CEE09482E55D551C7F10CD3924EB79 [68446602] FAILED
19AD0E66E130C6BF4922425E728B194F [9055983] OK
1FCB09AA0D9BC90528CF1DF208DAA07A [59161588] FAILED
25BC0DFB7E9153A03C669E564F9B9393 [844756080] FAILED
2FB1FC8CA7F30174C42E996EC9095DBF [844725504] FAILED
52D7E09B38AF06BAA95EECCB52E9A181 [671051264] FAILED
584F2629666640CB191D02D263C09ACE [783960226] FAILED
61BB6D799E3A0D766002B34B5AAA6964 [6514642] OK
71A7C1608A279DAE0B962478C031CA2F [726239232] FAILED
8BBEE9AE3EC21499732EA03A50010D08 [594913792] FAILED
8EF0CDF137F0CE88172777302C4C5222 [97858897] FAILED
96C9D833F7F90CA5FBC79428F9DD1B4B [730771456] FAILED
A445AB5EAB0FA85B6090F88FF114F714 [76945203] FAILED
B6F456061B8BF230026340ADE58418E1 [250] OK
C591B21C4CE00E69EA398BD0DCC87109 [264406940] FAILED
CE62CAE0E5C636E5554997285A423181 [734552064] FAILED
D90945451207E0435BABDEE7FB2CDB74 [529916059] FAILED
D9A0641E03700D801E8F2AA3D30D0D9C [833301504] FAILED
DBD35067ACE623E4F63FB138BF60205E [524677290] FAILED
DE307E6C87284540634CF9ACBE71622E [250] OK
FFBC07307CBADCFFA7294581CDD6D119 [78657951] FAILED

17 out of 21 files are corrupted, and you can clearly see that the size 
matters. All of these files are marked as 'completed' in the mldonkey web 
interface.



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http://savannah.nongnu.org/bugs/?func=detailbug&bug_id=2475&group_id=1409