Laszlo,
> -----Original Message----- > From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of > Laszlo Ersek > Sent: Tuesday, May 21, 2019 8:24 PM > To: Wang, Jian J <jian.j.w...@intel.com>; devel@edk2.groups.io; > ard.biesheu...@linaro.org > Cc: Lu, XiaoyuX <xiaoyux...@intel.com>; Ye, Ting <ting...@intel.com>; Leif > Lindholm <leif.lindh...@linaro.org>; Gao, Liming <liming....@intel.com> > Subject: Re: [edk2-devel] [PATCH v4 0/7] CryptoPkg: Upgrade OpenSSL to 1.1.1b > > Hi, > > On 05/21/19 11:09, Wang, Jian J wrote: > > Ard, > > > >> -----Original Message----- > >> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of > Ard > >> Biesheuvel > >> Sent: Tuesday, May 21, 2019 5:02 PM > >> To: Wang, Jian J <jian.j.w...@intel.com> > >> Cc: devel@edk2.groups.io; Laszlo Ersek <ler...@redhat.com>; Lu, XiaoyuX > >> <xiaoyux...@intel.com>; Ye, Ting <ting...@intel.com>; Leif Lindholm > >> <leif.lindh...@linaro.org>; Gao, Liming <liming....@intel.com> > >> Subject: Re: [edk2-devel] [PATCH v4 0/7] CryptoPkg: Upgrade OpenSSL to > 1.1.1b > >> > >> On Tue, 21 May 2019 at 09:43, Wang, Jian J <jian.j.w...@intel.com> wrote: > >>> > >>> Hi Ard, > >>> > >>> Any comments? > >>> > >>> Regards, > >>> Jian > >>> > >>>> -----Original Message----- > >>>> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of > >> Wang, > >>>> Jian J > >>>> Sent: Monday, May 20, 2019 9:41 AM > >>>> To: devel@edk2.groups.io; ard.biesheu...@linaro.org; Laszlo Ersek > >>>> <ler...@redhat.com> > >>>> Cc: Lu, XiaoyuX <xiaoyux...@intel.com>; Ye, Ting <ting...@intel.com>; > Leif > >>>> Lindholm <leif.lindh...@linaro.org>; Gao, Liming <liming....@intel.com> > >>>> Subject: Re: [edk2-devel] [PATCH v4 0/7] CryptoPkg: Upgrade OpenSSL to > >> 1.1.1b > >>>> > >>>> Ard, > >>>> > >>>> > >>>>> -----Original Message----- > >>>>> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf > Of > >> Ard > >>>>> Biesheuvel > >>>>> Sent: Friday, May 17, 2019 11:06 PM > >>>>> To: Laszlo Ersek <ler...@redhat.com> > >>>>> Cc: Wang, Jian J <jian.j.w...@intel.com>; devel@edk2.groups.io; Lu, > >> XiaoyuX > >>>>> <xiaoyux...@intel.com>; Ye, Ting <ting...@intel.com>; Leif Lindholm > >>>>> <leif.lindh...@linaro.org>; Gao, Liming <liming....@intel.com> > >>>>> Subject: Re: [edk2-devel] [PATCH v4 0/7] CryptoPkg: Upgrade OpenSSL to > >>>> 1.1.1b > >>>>> > >>>>> On Fri, 17 May 2019 at 15:17, Laszlo Ersek <ler...@redhat.com> wrote: > >>>>>> > >>>>>> On 05/17/19 15:04, Laszlo Ersek wrote: > >>>>>>> On 05/17/19 07:11, Wang, Jian J wrote: > >>>>>>>> Hi Laszlo, > >>>>>>>> > >>>>>>>> There's already a float library used in OpensslLib.inf. > >>>>>>>> > >>>>>>>> [LibraryClasses.ARM] > >>>>>>>> ArmSoftFloatLib > >>>>>>>> > >>>>>>>> The problem is that the below instance doesn't implement > >> __aeabi_ui2d > >>>>>>>> and __aeabi_d2uiz (I encountered this one as well) > >>>>>>>> > >>>>>>>> ArmPkg\Library\ArmSoftFloatLib\ArmSoftFloatLib.inf > >>>>>>>> > >>>>>>>> I think we can update this library support those two APIs. So what > >> about > >>>>>>>> we still push the patch and file a BZ to fix this issue? > >>>>>>> > >>>>>>> I'm OK with that, but it will break ARM and AARCH64 platforms that > >>>>>>> consume OpensslLib (directly or through BaseCryptLib), so this > >>>>>>> question > >>>>>>> is up to Leif and Ard to decide. > >>>>>> > >>>>>> Correction: break ARM platforms only, not AARCH64. > >>>>>> > >>>>> > >>>>> We obviously need to fix this before we can upgrade to a new OpenSSL > >> version. > >>>>> > >>>>> Do we really have a need for the random functions? These seem the only > >>>>> ones that use floating point, which the UEFI spec does not permit, so > >>>>> it would be better if we could fix this by removing the dependency on > >>>>> FP in the first place (and get rid of ArmSoftFloatLib entirely) > >>>>> > >>>> > >>>> BaseCryptLib provides RandSeed/RandBytes interface which wrap openssl > >> rand > >>>> functionalities. These interfaces are used by following components in > >>>> edk2 > >>>> > >>>> - CryptoPkg\Library\TlsLib\TlsInit.c > >>>> - SecurityPkg\HddPassword\HddPasswordDxe.c > >>>> > >>>> Openssl components, like asn1, bn, evp, ocsp, pem, pkcs7, pkcs12, rsa, > >>>> ssl > (in > >>>> addition > >>>> to cms, dsa, srp, which are disabled in edk2) will call rand_* interface > >>>> as > well. > >>>> > >> > >> If we have both internal (to Openssl) and external users of the RNG > >> api, then I guess there is no way to work around this. It is > >> unfortunate, since the RNG code in OpenSSL doesn't actually use double > >> types except for keeping an entropy count, which could just as easily > >> be kept in an integer variable. > > (1) I think I agree... However, it seems that the first function (or one > of the first functions) in OpenSSL to take an "entropy" parameter, of > type "double", was RAND_add(). And the RAND_add() manual states, > > RAND_add() mixes the num bytes at buf into the PRNG state. > Thus, if the data at buf are unpredictable to an adversary, > this increases the uncertainty about the state and makes the > PRNG output less predictable. Suitable input comes from user > interaction (random key presses, mouse movements) and certain > hardware events. The entropy argument is (the lower bound of) > an estimate of how much randomness is contained in buf, > measured in bytes. Details about sources of randomness and how > to estimate their entropy can be found in the literature, e.g. > RFC 1750. > > I've now looked up RFC 1750, and it contains copious amounts of math on > irrational numbers. Hence the use of floating point in OpenSSL, I'd guess. > > https://www.ietf.org/rfc/rfc1750.txt > > ... After digging a bit in the OpenSSL git history, I've found the > following commit (from 19 years ago): > > commit 853f757ecea74a271a7c5cdee3f3b5fe0d3ae863 > Author: Bodo Möller <b...@openssl.org> > Date: Sat Feb 19 15:22:53 2000 +0000 > > Allow for higher granularity of entropy estimates by using 'double' > instead of 'unsigned' counters. > Seed PRNG in MacOS/GetHTTPS.src/GetHTTPS.cpp. > > Partially submitted by Yoram Meroz <yo...@mail.idrive.com>. > > It was the commit with > > -void RAND_add(const void *buf,int num,int entropy); > +void RAND_add(const void *buf,int num,double entropy); > > FWIW, the "PRNG" reference at the end of the commit message seems > meaningless. Check for yourself: > > $ git show 853f757ecea7:MacOS/GetHTTPS.src/GetHTTPS.cpp > > The fact that "entropy" is now of type "double" does not seem to be put > to use, anywhere in that file. > > I'll send a query to the openssl-users mailing list, just so we > understand better. > > That's a good digging. Thanks for doing this. > >> So we will need to fix ArmSoftFloatLib before we can merge this > >> OpenSSL update. > > (2) NB, I think we can no longer merge this feature for > edk2-stable201905. The soft feature freeze criterion is that all patches > be reviewed (approved) on-list before the SFF date / announcement, and > that was not fulfilled in this case. > You're right. But we still need to complete the upgrade ASAP after stable tag. There're several other features pending on it. > > >> I'm happy to help doing that, could you please > >> summarize what we are missing today? > >> > > > > Great. I think there're two intrinsic functions missing here > > > > __aeabi_ui2d > > __aeabi_d2uiz > > > > Laszlo, please double check if these two are enough. > > (3) I can only report the failure that trips up the build for me. I did > that here: > > http://mid.mail-archive.com/049e489c-b58f-0fc5-1c66- > 8ad920d93...@redhat.com > https://edk2.groups.io/g/devel/message/40823 > > > Thus, for me, the missing symbol was "__aeabi_ui2d". > > It's possible that the 32-bit ARM build will fail at a different (later) > stage as well, but I can't tell until I get past this one. (And I don't > think I can implement a "shim" function for the missing symbol, just to > let the build progress.) > I got __aeabi_d2uiz reported missing, in addition to __aeabi_ui2d, if I build with cross-compiler arm-linux-gnueabi-gcc-5. Using dummy implementations of both them can make build pass. Any chances the real implementation of these functions cause other missing symbol? Regards, Jian > Thanks, > Laszlo > > > Thanks for doing this. > > > > Regards, > > Jian > > > >> > > > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. 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