> is it possible with crypto++ generating sha3 hashes (so I mean the Keccak) > with a specific length? I could only see sha3 instances with 224,256,384 > and 512 bits. I would like to generate hashes with length d. >
Derive a class from Keccak base class (http://www.cryptopp.com/docs/ref/class_keccak.html). Something like: Keccack_192 : public Keccack { public: CRYPTOPP_CONSTANT(DIGESTSIZE = 24) Keccack_192() : Keccack(DIGESTSIZE) {} }; Using something other that F1600 or XOF byte 0x06 will be a larger pain point. We don't have a good strategy at the moment for Keccak, different sponge functions and XOFs. A few of us have been bouncing emails offlist. For example, how extensible should we make the Keccack classes? Should the Keccack base class take two additional template parameters: one for the sponge function, and one for the XOF? Some more of the back story: Keccak was a last-minute addition. We wanted SHA3 to be FIPS 202 conforming. To do that, folks needed access to pre-FIPS 202 behavior, and that's Keccak from round 6 of the NIST selection process. Or we needed to completely rework SHA3/Keccak, but we don't have the developer cycles at the moment. Jeff -- -- You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to cryptopp-users-unsubscr...@googlegroups.com. More information about Crypto++ and this group is available at http://www.cryptopp.com. --- You received this message because you are subscribed to the Google Groups "Crypto++ Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to cryptopp-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
