On Wed, 5 May 2021 09:58:11 -0400 Jeffrey Walton <noloa...@gmail.com> wrote:
> On Tue, May 4, 2021 at 2:08 PM Rogier <rogier.b...@gmail.com> wrote: > > > > I keep getting segfaults within cryptopp on freebsd for at least PBKDF > > DeriveKey(). I used the sample code from the wiki: > > https://www.cryptopp.com/wiki/PKCS12_PBKDF > > > > I used the cryptopp-lib that is available through the binary ports > > collection (pkg). The reported version is 8.5.0 > > > > Any ideas on how I can fix this or at least where to look? > > > > Below all the technical info about versions and traces for a first triage. > > Ugh... I can duplicate this, too using FreeBSD's version of the library. > > It looks like the problem is at frame 3: > > #3 0x0000000000207739 in CryptoPP::HashTransformation::CalculateDigest ( > this=0x7fffffffe820, digest=0x800253000 "", input=<optimized out>, > length=192) at /usr/local/include/cryptopp/cryptlib.h:1189 > No locals. > > length=192 is wrong, if I am not mistaken. > > When I look at frame 4, where 192 is passed to frame 3: > > (gdb) f 4 > #4 CryptoPP::PKCS12_PBKDF<CryptoPP::SHA256>::DeriveKey (this=<optimized out>, > derived=0x7fffffffe9a0 "\320`\263", derivedLen=32, > purpose=<optimized out>, secret=<optimized out>, secretLen=8, > salt=0x7fffffffeac0 "salt", saltLen=4, iterations=1024, timeInSeconds=0) > at /usr/local/include/cryptopp/pwdbased.h:439 > 439 hash.CalculateDigest(Ai, buffer, buffer.size()); > (gdb) p Ai > $3 = { > m_alloc = {<CryptoPP::AllocatorBase<unsigned char>> = {<No data > fields>}, <No data fields>}, m_mark = 18446744073709551615, m_size = > 32, > m_ptr = 0x800253000 ""} > > So the size looks OK at frame 4. > > On the upside, building Crypto++ 8.5 from sources is OK and tests OK. > I can't duplicate when using Crypto++ 8.5 or Master. It is OK with > both the static lib and shared lib. > > I would be interested to know how FreeBSD builds the library. Like are > they using LTO, which is known bad. Every distro I have seen that uses > LTO has problems with it. Also see > https://cryptopp.com/wiki/Link_Time_Optimization. > > Is there any chance you can avoid FreeBSD's version, and build > Crypto++ yourself? > > Jeff > Pfiew, I'm glad you can reproduce this issue. I was starting to question my sanity. I'll try to build de library myself to see if it improves. Rogier -- -- Insanity: doing the same thing over and over again -- and expecting different results. -- 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/20210505185904.61f1b6652e00dfac265d4eea%40gmail.com.
