Re: [dpdk-dev] [EXT] [PATCH v3 10/11] test: add pkcs1_5 padding simulation

["Kusztal, ArkadiuszX" <arkadiuszx.kusztal@intel.com>]

> -----Original Message-----
> From: Shally Verma [mailto:shallyv@marvell.com]
> Sent: Wednesday, July 17, 2019 12:23 PM
> To: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com>; dev@dpdk.org
> Cc: akhil.goyal@nxp.com; Trahe, Fiona <fiona.trahe@intel.com>
> Subject: RE: [EXT] [PATCH v3 10/11] test: add pkcs1_5 padding simulation
> 
> 
> 
> > -----Original Message-----
> > From: Arek Kusztal <arkadiuszx.kusztal@intel.com>
> > Sent: Wednesday, July 17, 2019 12:23 AM
> > To: dev@dpdk.org
> > Cc: akhil.goyal@nxp.com; fiona.trahe@intel.com; Shally Verma
> > <shallyv@marvell.com>; Arek Kusztal <arkadiuszx.kusztal@intel.com>
> > Subject: [EXT] [PATCH v3 10/11] test: add pkcs1_5 padding simulation
> >
> > External Email
> >
> > ----------------------------------------------------------------------
> > This patch adds function to simulate pkcs1_5 padding, it serves
> > nothing else than example. It provides no security and should not be
> > used in security context.
> >
> > Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
> > ---
> [Shally] Sorry did not get context of this test. Is it to describe
> PADDING_NONE?
Yes, it helps to show workflow of PADDING_NONE case selected.

> 
> >  app/test/test_cryptodev_asym_util.h | 54
> > +++++++++++++++++++++++++++++++++++++
> >  1 file changed, 54 insertions(+)
> >
> > diff --git a/app/test/test_cryptodev_asym_util.h
> > b/app/test/test_cryptodev_asym_util.h
> > index b3d9fb4..f984166 100644
> > --- a/app/test/test_cryptodev_asym_util.h
> > +++ b/app/test/test_cryptodev_asym_util.h
> > @@ -1,10 +1,64 @@
> >  /* SPDX-License-Identifier: BSD-3-Clause
> >   * Copyright(c) 2018 Cavium Networks
> > + * Copyright (c) 2019 Intel Corporation
> >   */
> >
> >  #ifndef TEST_CRYPTODEV_ASYM_TEST_UTIL_H__  #define
> > TEST_CRYPTODEV_ASYM_TEST_UTIL_H__
> >
> > +/*
> > + * Two functions below simulate pkcs 1.5 padding and serves only as
> > +an example,
> > + * both offer no security.
> > + */
> > +static inline int rsa_simulate_pkcs1_5_padding(int op, uint8_t *p,
> > +		int key_size, const uint8_t *src, int len) {
> > +
> > +	int ps_len;
> > +
> > +	if (len > key_size - 11)
> > +		return -1;
> > +	ps_len = key_size - len - 3;
> > +
> > +	*(p++) = 0;
> > +	*(p++) = op ? 1 : 2;
> > +	if (op) {
> > +		while (ps_len--)
> > +			*(p++) = 0xFF;
> > +	} else {
> > +		while (ps_len--) {
> > +			*p = (uint8_t)rand();
> > +			*p ^= !(*p);
> > +			p++;
> > +		}
> > +	}
> > +
> > +	*(p++) = 0;
> > +	memcpy(p, src, len);
> > +
> > +	return 0;
> > +}
> > +
> > +static inline int rsa_simulate_strip_pkcs1_5_padding(uint8_t *src,
> > +		int key_size) {
> > +	uint8_t tmp[key_size], *orig_src = src;
> > +	int i = 1;
> > +	++src;
> > +	while (*(src) && i < key_size) {
> > +		++i;
> > +		++src;
> > +	}
> > +	if (i == key_size)
> > +		return -1;
> > +
> > +	++i;
> > +	++src;
> > +
> > +	memcpy(tmp, src, key_size - i);
> > +	memcpy(orig_src, tmp, key_size - i);
> > +	return key_size - i;
> > +}
> > +
> > +
> >  /* Below Apis compare resulted buffer to original test vector */
> >
> >  static inline int rsa_verify(struct rsa_test_data *rsa_param,
> > --
> > 2.1.0