Do I have any other options if intrinsics are not available? My only limitation is that I can't use the .asm files.
On Monday, December 18, 2017 at 3:30:22 PM UTC+2, Jeffrey Walton wrote: > > > > On Monday, December 18, 2017 at 5:54:08 AM UTC-5, Samir Muradov wrote: >> >> Hi, I need to include the .cpp and .h files and get them to compile >> inside my project. >> I tried defining CRYPTOPP_DISABLE_ASM but it still tries to call >> MASM_RSA_GenerateBlock. Here is the error: >> >> Error LNK2019 unresolved external symbol MASM_RSA_GenerateBlock >> referenced in function "public: virtual void __cdecl >> CryptoPP::RDSEED::GenerateBlock(unsigned char *,unsigned __int64)" >> (?GenerateBlock@RDSEED@CryptoPP@@UEAAXPEAE_K@Z) >> CryptoppProjucerConsole_ConsoleApp file:dir\rdrand.obj 1 >> >> Inside rdrand.cpp I noticed that it defines MASM_RDRAND_ASM_AVAILABLE at >> line 58-60 without checking if CRYPTOPP_DISABLE_ASM is defined. >> As a workaround for now I changed line 59-60 from >> # define MASM_RDRAND_ASM_AVAILABLE 1 >> # define MASM_RDSEED_ASM_AVAILABLE 1 >> to >> # define ALL_RDRAND_INTRIN_AVAILABLE 1 >> # define ALL_RDSEED_INTRIN_AVAILABLE 1 >> >> It is my understanding that the ASM version for rdrand is considered >> experimental and was only added recently. Are there any plans to support >> CRYPTOPP_DISABLE_ASM as originally intended? >> > > Things have changed a bit in Master, but its mostly the same as 5.6.5. > > In Master... Microsoft platforms prefer the intrinsics and Unix/Linux > prefer assembly. If intrinsics are not available then MS platforms fallback > to ASM. Also see > https://github.com/weidai11/cryptopp/blob/master/rdrand.cpp . > > Unix and Linux prefer ASM because of a GCC bug in the intrinsics. We > really need to avoid intrinsics when using GCC. Also see CVE-2017-11671. > > So I am clear... You prefer nothing if intrinsics are not available. Is > that correct? > > 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.
