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+--- Thread: sha1 64 hex with only 8 variables (/thread-3499.html)
sha1 64 hex with only 8 variables - MisterY - 06-26-2014
Hi all
I have the following constellation:
SHA1(64 bytes) = hash
Known are 56 of these 64 bytes as well as the hash value itself. Is it possible to set up a masked attack with the following specification?
- a length of 64 bytes
- 56 bytes are constant, only 8 bytes are variable
- the possible input is the whole byte range, 0x00 to 0xFF
Thanks a lot for your thoughts
RE: sha1 64 hex with only 8 variables - undeath - 06-26-2014
hashcat supports at most 55bytes of plaintext.
RE: sha1 64 hex with only 8 variables - atom - 06-26-2014
Right, there's no way to do this with hashcat unless a special new hash-mode is added. This depends on where that hash / salt combination that you talk about is used and if it makes sense to add it to hashcat so that many users can benefit from it. If you think that's the case, please add a trac ticket
RE: sha1 64 hex with only 8 variables - MisterY - 06-26-2014
Okay, thanks for your answers. For me it's a quite important single case, but not of public interest.