Thanks Jeff, After I modified validate1.cpp per your instructions everything passed.
Thank you very much for your help, Arthur On Tuesday, December 8, 2015 at 12:35:54 PM UTC-7, Jeffrey Walton wrote: > > Hi Arthur, > > Testing RDSEED generator... >> >> >> >> CryptoPP::Exception caught: RDSEED: GCC_RSA_GenerateBlock operation failed >> >> >> > Uri and I began hitting this, too after the release. The issue is RDRAND > never fails to fulfill a request (I have never seen it happen), while > RDSEED fails to fulfill on occasion. Requesting 20K random bytes is enough > to trigger the failure. > > To fix it, you just need to bump the number of retries for RDSEED. We did > that on validat1.cpp at commit 0059f486ad0467d5 ( > https://github.com/weidai11/cryptopp/commit/0059f486ad0467d5c4dc692db99a5a5f96c2a733 > ): > > $ git diff 0059f486ad0467d5^ 0059f486ad0467d5 > diff --git a/validat1.cpp b/validat1.cpp > index 1d61463..144bdbf 100644 > --- a/validat1.cpp > +++ b/validat1.cpp > @@ -460,6 +460,7 @@ bool TestAutoSeeded() > #if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64) > bool TestRDRAND() > { > + // Testing on 6th generation i7 shows RDRAND needs less than 8 > retries for 10K bytes. > RDRAND rdrand; > bool entropy = true, compress = true, discard = true; > static const unsigned int SIZE = 10000; > @@ -532,7 +533,8 @@ bool TestRDRAND() > #if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64) > bool TestRDSEED() > { > - RDSEED rdseed; > + // Testing on 6th generation i7 shows RDSEED needs about 128 retries > for 10K bytes. > + RDSEED rdseed(128); > bool entropy = true, compress = true, discard = true; > static const unsigned int SIZE = 10000; > > 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.
