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+--- Thread: hash of a hash (/thread-3187.html)
hash of a hash - coiner232 - 03-02-2014
I have a ripemd160 hash that is the hash of an sha256 hash of plaintext. Is there any way to recover the hex values of the sha256 hash so I can recover the plaintext? To be clear:
1. original plaintext: ???????????? UNKNOWN
2. SHA256 of 1: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx UNKNOWN
3. RIPEMD160 of 2: KNOWN
My question is how to recover the SHA256 hash?
RE: hash of a hash - Mem5 - 03-02-2014
Your SHA256 hash is a plain-text for RIPEMD160.
So you consider it as a classic password. You know the length (64 characters) and the charset (hexadecimal).
But your problem here is that 64 characters is huge to bruteforce, and probably not in dictionnary.
RE: hash of a hash - philsmd - 03-02-2014
It is not working like that, instead you need a cracker that supports the algorithm:
RipeMD160 (SHA256 (pass))
where SHA256 output is in hex I suppose
Currently hashcat does not support this format. Where is this format used?