Re: [PATCH v2] CryptoPkg/BaseCryptLib: Eliminate extra buffer copy in Pkcs7Verify()

["Yao, Jiewen" <jiewen.yao@intel.com>]

https://github.com/tianocore/edk2/pull/2055

pushed:
https://github.com/tianocore/edk2/commit/f22feb0e3b3f08b95201b258b104c45a2acef71f

> -----Original Message-----
> From: Yao, Jiewen
> Sent: Saturday, September 11, 2021 11:30 PM
> To: Bob Morgan <bobm@nvidia.com>; devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Lu, XiaoyuX <XiaoyuX.Lu@intel.com>;
> Jiang, Guomin <Guomin.Jiang@intel.com>
> Subject: RE: [PATCH v2] CryptoPkg/BaseCryptLib: Eliminate extra buffer copy in
> Pkcs7Verify()
> 
> Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
> 
> > -----Original Message-----
> > From: Bob Morgan <bobm@nvidia.com>
> > Sent: Saturday, September 11, 2021 5:34 AM
> > To: devel@edk2.groups.io
> > Cc: Bob Morgan <bobm@nvidia.com>; Yao, Jiewen <jiewen.yao@intel.com>;
> > Wang, Jian J <jian.j.wang@intel.com>; Lu, XiaoyuX <xiaoyux.lu@intel.com>;
> > Jiang, Guomin <guomin.jiang@intel.com>
> > Subject: [PATCH v2] CryptoPkg/BaseCryptLib: Eliminate extra buffer copy in
> > Pkcs7Verify()
> >
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3617
> >
> > Create a read-only openSSL BIO wrapper for the existing input
> > buffer passed to Pkcs7Verify() instead of copying the buffer
> > into an empty writable BIO which causes memory allocations
> > within openSSL.
> >
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Jian J Wang <jian.j.wang@intel.com>
> > Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
> > Cc: Guomin Jiang <guomin.jiang@intel.com>
> > Signed-off-by: Bob Morgan <bobm@nvidia.com>
> > ---
> >  CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7VerifyCommon.c | 6 +-----
> >  1 file changed, 1 insertion(+), 5 deletions(-)
> >
> > diff --git a/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7VerifyCommon.c
> > b/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7VerifyCommon.c
> > index d99597d181..8eda98f7b2 100644
> > --- a/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7VerifyCommon.c
> > +++ b/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7VerifyCommon.c
> > @@ -864,15 +864,11 @@ Pkcs7Verify (
> >    // For generic PKCS#7 handling, InData may be NULL if the content is present
> >    // in PKCS#7 structure. So ignore NULL checking here.
> >    //
> > -  DataBio = BIO_new (BIO_s_mem ());
> > +  DataBio = BIO_new_mem_buf (InData, (int) DataLength);
> >    if (DataBio == NULL) {
> >      goto _Exit;
> >    }
> >
> > -  if (BIO_write (DataBio, InData, (int) DataLength) <= 0) {
> > -    goto _Exit;
> > -  }
> > -
> >    //
> >    // Allow partial certificate chains, terminated by a non-self-signed but
> >    // still trusted intermediate certificate. Also disable time checks.
> > --
> > 2.17.1