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

[Shally Verma <shallyv@marvell.com>]

> -----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?

>  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