linux-kernel - Re: [PATCH v3 0/2] crypto: ecdh & ecc: Fix private key byte ordering issues

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Date: Fri, 26 Apr 2024 17:33:55 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Stefan Berger <stefanb@...ux.ibm.com>
Cc: linux-crypto@...r.kernel.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, jarkko@...nel.org, ardb@...nel.org,
	git@...sn.com, hkario@...hat.com, simo@...hat.com
Subject: Re: [PATCH v3 0/2] crypto: ecdh & ecc: Fix private key byte ordering
 issues

On Thu, Apr 18, 2024 at 11:24:43AM -0400, Stefan Berger wrote:
> The 1st patch fixes a byte ordering issue where ctx->private_key is
> currently passed to ecc_is_key_valid but the key is in reverse byte order.
> To solve this issue it introduces the variable 'priv', that is already used
> throughout the ecc and ecdh code bases for a private key in proper byte
> order, and calls ecc_is_key_valid with 'priv'. Note that ecc_gen_privkey
> also calls __ecc_is_key_valid with 'priv' already.
> 
> The 2nd patch gets rid of the 'priv' variable wherever it is used to hold
> a private key (byte-swapped initialized from ctx->private_key) in proper
> byte order and uses ctx->private_key directly that is now initialized in
> proper byte order.
> 
> Regards,
>   Stefan
> 
> v3:
>   - Added Jarkko's A-b tag
>   - Expanded on the description of changes to ecc_gen_privkey (2/2)
> 
> v2:
>   - Added missing zeroizing of priv variable (1/2)
>   - Improved patch description (2/2)
> 
> 
> 
> 
> Stefan Berger (2):
>   crypto: ecdh - Pass private key in proper byte order to check valid
>     key
>   crypto: ecdh & ecc - Initialize ctx->private_key in proper byte order
> 
>  crypto/ecc.c                  | 29 ++++++++++-------------------
>  crypto/ecdh.c                 |  9 ++++++---
>  include/crypto/internal/ecc.h |  3 ++-
>  3 files changed, 18 insertions(+), 23 deletions(-)
> 
> -- 
> 2.43.0

All applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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