anti virus - Deleting sentences in database file
2014-07
Gabriel
I'm writing a MD5 based antivirus, and my friend send to me a document with thousands of samples and their MD5. All is fine, but I have to delete all sentences what contain "File does not exists:" along with the short numbers between Virus name and the MD5 hash.
How can I accomplish this?
:
Kieveli
I'm interested in storing an indicator of file / directory integrity between two archived copies of directories. It's around 1TB of data stored recursively on hard drives. Is there a way using OpenSSL to generate a single hash for all the files that can be used as a comparison between two copies of the data, or at a later point to verify the data has not changed?
AaronLS
You could recursively generate all the hashes, concatenate the hashes into a single file, then generate a hash of that file.
John T
You can't do a cumulative hash of them all to make a single hash, but you can compress them first then compute the hash:
$tar -czpf archive1.tar.gz folder1/
$tar -czpf archive2.tar.gz folder2/
$openssl md5 archive1.tar.gz archive2.tar.gz
to recursively hash each file:
$find . -type f -exec openssl md5 {} +
Rudedog
Doing a md5 sum on the tar would never work unless all of the metadata (creation date, etc.) was identical as well, because tar stores that as part of its archive.
I would probably do an md5 sum of the contents of all of the files:
find folder1 -type f | sort | tr '\n' '\0' | xargs -0 cat | openssl md5
find folder2 -type f | sort | tr '\n' '\0' | xargs -0 cat | openssl md5
Stephen