On Saturday, June 27, 2020 at 4:14:51 PM UTC-4, DjVortex wrote: > > I would need to calculate SHA3 hashes for a small project, and it would be > extremely useful if I could simply take the sha3.h file and the few .cpp > files that it requires into the project, rather than the entire crypto++ > library. So I thought that I would just extract these few files and add > them to my project. > > Little did I know the endless swamp I would be getting myself into. > > After adding sha3.cpp to the project not very surprisingly I got a big > bunch of linker errors due to undefined references. To be expected. Seeing > what the missing symbols were I added keccak.cpp. And then keccak_core.cpp. > And then cryptlib.cpp. And then misc.cpp. And then filters.cpp. And then... > > Something like an hour and 50 added .cpp files later, rather than the > number of "undefined reference to" errors having become smaller, to my > dismay it was only growing larger, and larger, and larger, and larger. Not > even half of the .cpp files looked like they had absolutely anything to do > with the SHA3 or Keccak algorithms. > > Some of the "undefined reference to" errors were completely *impossible* > to figure out because they mention symbol names that do not appear > *anywhere* in the entire project. Grep all the files with the symbol name, > and zero results. Some of the "undefined reference to" errors refer to > names that *only* appear in .cpp files that I'm already compiling into the > project. > > After about an hour trying to get it to compile, and with the list of > "undefined reference to" errors only becoming larger rather than smaller, I > gave up. This is physically impossible. I don't think I have the days > required to wade through the 199 .cpp files to try to find out which ones > are necessary to compile into the project merely to calculate some SHA3 > hashes. (Especially since most probably like 90% of them aren't even used > to calculate the hash in question, I assume.) > > Maybe I'll just implement SHA3 myself as a single simple source file. Any > resources for the exact algorithm? For some reason it seems really hard to > find it online. (Although it would have been nice to be able to compare the > result to what crypto++ produces to test its validity. But oh well, I > suppose I'll probably have to figure out something else.) >
If you are looking for high performance SHA-3 only, then check out Andy Polyakov's Cryptogams. Andy provides stand-alone algorithm implementations you can integrate into your application. Andy's GitHub is at https://github.com/dot-asm/cryptogams. Cryptogams is a little lite on documentation. I wrote some up a few years ago at https://wiki.openssl.org/index.php/Cryptogams_AES and https://wiki.openssl.org/index.php/Cryptogams_SHA. Jeff -- You received this message because you are subscribed to "Crypto++ Users". More information about Crypto++ and this group is available at http://www.cryptopp.com and http://groups.google.com/forum/#!forum/cryptopp-users. --- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/cryptopp-users/edf34cdd-382f-43cb-9219-de33a3dd66dbo%40googlegroups.com.
