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From: Akhil Goyal <gakhil@marvell.com>
To: Anoob Joseph <anoobj@marvell.com>, Thomas Monjalon <thomas@monjalon.net>,
Jerin Jacob Kollanukkaran <jerinj@marvell.com>, Konstantin Ananyev
<konstantin.v.ananyev@yandex.ru>, Bernard Iremonger
<bernard.iremonger@intel.com>
CC: Hemant Agrawal <hemant.agrawal@nxp.com>,
=?iso-8859-1?Q?Mattias_R=F6nnblom?= <mattias.ronnblom@ericsson.com>, Kiran
Kumar Kokkilagadda <kirankumark@marvell.com>, Volodymyr Fialko
<vfialko@marvell.com>, "dev@dpdk.org" <dev@dpdk.org>, Olivier Matz
<olivier.matz@6wind.com>
Subject: RE: [PATCH v2 09/22] app/test: add lib pdcp tests
Thread-Topic: [PATCH v2 09/22] app/test: add lib pdcp tests
Thread-Index: AQHZbvkOXNgVhPuK50eErA5+HpB37q9fzGdggABOJICAAACkwA==
Date: Thu, 18 May 2023 12:06:09 +0000
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References: <20221222092522.1628-1-anoobj@marvell.com>
<20230414174512.642-1-anoobj@marvell.com>
<20230414174512.642-10-anoobj@marvell.com>
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> > > diff --git a/app/test/meson.build b/app/test/meson.build index
> > > 52d9088578..0f658aa2ab 100644
> > > --- a/app/test/meson.build
> > > +++ b/app/test/meson.build
> > > @@ -96,6 +96,7 @@ test_sources =3D files(
> > > 'test_meter.c',
> > > 'test_mcslock.c',
> > > 'test_mp_secondary.c',
> > > + 'test_pdcp.c',
> > > 'test_per_lcore.c',
> > > 'test_pflock.c',
> > > 'test_pmd_perf.c',
> > > diff --git a/app/test/test_cryptodev.h b/app/test/test_cryptodev.h
> > > index abd795f54a..89057dba22 100644
> > > --- a/app/test/test_cryptodev.h
> > > +++ b/app/test/test_cryptodev.h
> > > @@ -4,6 +4,9 @@
> > > #ifndef TEST_CRYPTODEV_H_
> > > #define TEST_CRYPTODEV_H_
> > >
> > > +#include <rte_crypto.h>
> > > +#include <rte_cryptodev.h>
> > > +
> >
> > Can we remove these includes from here and add in test_pdcp.c directly?
>=20
> [Anoob] Why? 'test_cryptodev.h' already has many references to rte_crypto=
dev
> symbols. Not including the dependencies is not correct.
>=20
In that case, it can be a separate patch. But not in this patch.
> >
> >
> > > + if (conf->is_integrity_protected) {
> > > + if (conf->entity.pdcp_xfrm.pkt_dir =3D=3D
> > > RTE_SECURITY_PDCP_UPLINK) {
> > > + conf->entity.crypto_xfrm =3D &conf->a_xfrm;
> > > +
> > > + a_xfrm.auth.op =3D
> > RTE_CRYPTO_AUTH_OP_GENERATE;
> > > + a_xfrm.next =3D &conf->c_xfrm;
> > > +
> > > + c_xfrm.cipher.op =3D
> > > RTE_CRYPTO_CIPHER_OP_ENCRYPT;
> > > + c_xfrm.next =3D NULL;
> > > + } else {
> > > + conf->entity.crypto_xfrm =3D &conf->c_xfrm;
> > > +
> > > + c_xfrm.cipher.op =3D
> > > RTE_CRYPTO_CIPHER_OP_DECRYPT;
> > > + c_xfrm.next =3D &conf->a_xfrm;
> > > +
> > > + a_xfrm.auth.op =3D RTE_CRYPTO_AUTH_OP_VERIFY;
> > > + a_xfrm.next =3D NULL;
> > > + }
> > > + } else {
> > > + conf->entity.crypto_xfrm =3D &conf->c_xfrm;
> > > + c_xfrm.next =3D NULL;
> > > +
> > > + if (conf->entity.pdcp_xfrm.pkt_dir =3D=3D
> > > RTE_SECURITY_PDCP_UPLINK)
> > > + c_xfrm.cipher.op =3D
> > > RTE_CRYPTO_CIPHER_OP_ENCRYPT;
> > > + else
> > > + c_xfrm.cipher.op =3D
> > > RTE_CRYPTO_CIPHER_OP_DECRYPT;
> > > + }
> > > + /* Update xforms to match PDCP requirements */
> > > +
> > > + if ((c_xfrm.cipher.algo =3D=3D RTE_CRYPTO_CIPHER_AES_CTR) ||
> > > + (c_xfrm.cipher.algo =3D=3D RTE_CRYPTO_CIPHER_ZUC_EEA3 ||
> > > + (c_xfrm.cipher.algo =3D=3D RTE_CRYPTO_CIPHER_SNOW3G_UEA2)))
> > > + c_xfrm.cipher.iv.length =3D 16;
> > > + else
> > > + c_xfrm.cipher.iv.length =3D 0;
> > > +
> > > + if (conf->is_integrity_protected) {
> > > + if (a_xfrm.auth.algo =3D=3D RTE_CRYPTO_AUTH_NULL)
> > > + a_xfrm.auth.digest_length =3D 0;
> > > + else
> > > + a_xfrm.auth.digest_length =3D 4;
> >
> > This if-else is not needed. If is_integrity_protected, digest_length sh=
ould
> > always be 4.
>=20
> [Anoob] I had explained this in v1 patch set. Will try again.
>=20
> In PDCP, with AUTH_NULL it is expected to have 4 bytes of zeroized digest=
.
>=20
> With AUTH_NULL, it is lib PDCP which would add zeroized digest. No PMD
> currently supported in DPDK supports non-zero digest with AUTH-NULL. Also=
, it
> is not specified what is the digest added in case of AUTH-NULL.
In auth_xform, digest_length is the expected length of digest coming out of=
crypto device.
Now if the device is expected to support PDCP, and we are reusing the crypt=
o APIs,
We can specify the digest length required for NULL auth.
The PMDs capability can be updated accordingly.
You can add a comment in the rte_crypto_auth_xform specifically for NULL au=
th for PDCP case.
The reason, I am insisting on this is, for the user, while configuring auth=
_xform,
it is setting digest length as 0 and when the packet is received the packet=
length
is increased by digest. This will create confusion.
And it will also help in identifying the case of no integrity and null inte=
grity.
>=20
> > Also define a macro for MAC-I len. It is being used at multiple places.
> > Similarly for IV length macro can be defined.
> >
>=20
> [Anoob] Agreed. You want me to introduce RTE_PDCP_MAC_I_LEN or
> something local would do?
I am ok either way. Having defined in library would be better, to be used i=
n lib and PMD as well.
>=20
> > > +
> > > + if ((a_xfrm.auth.algo =3D=3D RTE_CRYPTO_AUTH_ZUC_EIA3) ||
> > > + (a_xfrm.auth.algo =3D=3D
> > RTE_CRYPTO_AUTH_SNOW3G_UIA2))
> > > + a_xfrm.auth.iv.length =3D 16;
> > > + else
> > > + a_xfrm.auth.iv.length =3D 0;
> > > + }
> > > +
> > > + conf->c_xfrm =3D c_xfrm;
> > > + conf->a_xfrm =3D a_xfrm;
> > > +
> > > + conf->entity.dev_id =3D (uint8_t)cryptodev_id_get(conf-
> > > >is_integrity_protected,
> > > + &conf->c_xfrm, &conf->a_xfrm);
> > > +
> > > + if (pdcp_test_params[index].domain =3D=3D
> > > RTE_SECURITY_PDCP_MODE_CONTROL ||
> > > + pdcp_test_params[index].domain =3D=3D
> > > RTE_SECURITY_PDCP_MODE_DATA) {
> > > + data =3D pdcp_test_data_in[index];
> > > + hfn =3D pdcp_test_hfn[index] <<
> > pdcp_test_data_sn_size[index];
> > > + sn =3D pdcp_sn_from_raw_get(data,
> > > pdcp_test_data_sn_size[index]);
> > > + count =3D hfn | sn;
> > > + }
> >
> > The above logic can go inside lib PDCP as well.
> > This is specific to PDCP and not user dependent.
> > You can reuse the pdcp_xfrm.hfn as well.
> >
>=20
> [Anoob] Sorry, what exactly can go into lib PDCP? This snippet is reading=
SN used
> in a test vector and constructs the count based on SN & HFN value from ve=
ctor.
This count value is being used to establish entity. I am saying, instead of=
taking
Count, take sn as input and in the libpdcp combine pdcp_xfrm.hfn and sn as =
needed
to create count and store in entity_priv.
Just wanted to reduce the application headache to make bitshifting and ORin=
g to SN.