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Date:   Fri, 11 Sep 2020 16:57:47 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     linux-crypto@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Arnd Bergmann <arnd@...db.de>, netdev@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-nfs@...r.kernel.org
Subject: Re: [PATCH v3 0/7] crypto: mark ecb(arc4) skcipher as obsolete

On Mon, Aug 31, 2020 at 06:16:42PM +0300, Ard Biesheuvel wrote:
> RC4 hasn't aged very well, and is a poor fit for the skcipher API so it
> would be good if we could get rid of the ecb(arc4) drivers in the kernel
> at some point in the future. This prevents new users from creeping in, and
> allows us to improve the skcipher API without having to care too much about
> obsolete algorithms that may be difficult to support going forward.
> 
> So let's get rid of any remaining in-kernel users, either by switching them
> to the arc4 library API (for cases which simply cannot change algorithms,
> e.g., WEP), or dropping the code entirely. Also remove the remaining h/w
> accelerated implementations, and mark the generic s/w implementation as
> obsolete in Kconfig.
> 
> Changes since v2:
> - depend on CRYPTO_USER_API not CRYPTO_USER
> - rename CRYPTO_USER_ENABLE_OBSOLETE to CRYPTO_USER_API_ENABLE_OBSOLETE for
>   clarity
> 
> Changes since RFC [0]:
> - keep ecb(arc4) generic C implementation, and the associated test vectors,
>   but print a warning about ecb(arc4) being obsolete so we can identify
>   remaining users
> - add a Kconfig option to en/disable obsolete algorithms that are only kept
>   around to prevent breaking users that rely on it via the socket interface
> - add a patch to clean up some bogus Kconfig dependencies
> - add acks to patches #1, #2 and #3
> 
> [0] https://lore.kernel.org/driverdev-devel/20200702101947.682-1-ardb@kernel.org/
> 
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Trond Myklebust <trond.myklebust@...merspace.com>
> Cc: Anna Schumaker <anna.schumaker@...app.com>
> Cc: "J. Bruce Fields" <bfields@...ldses.org>
> Cc: Chuck Lever <chuck.lever@...cle.com>
> Cc: Eric Biggers <ebiggers@...gle.com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-crypto@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Cc: devel@...verdev.osuosl.org
> Cc: linux-nfs@...r.kernel.org
> 
> Ard Biesheuvel (7):
>   staging/rtl8192e: switch to RC4 library interface
>   staging/rtl8192u: switch to RC4 library interface
>   SUNRPC: remove RC4-HMAC-MD5 support from KerberosV
>   crypto: n2 - remove ecb(arc4) support
>   crypto: bcm-iproc - remove ecb(arc4) support
>   net: wireless: drop bogus CRYPTO_xxx Kconfig selects
>   crypto: arc4 - mark ecb(arc4) skcipher as obsolete
> 
>  crypto/Kconfig                                |  10 +
>  crypto/arc4.c                                 |  10 +
>  drivers/crypto/bcm/cipher.c                   |  96 +-----
>  drivers/crypto/bcm/cipher.h                   |   1 -
>  drivers/crypto/bcm/spu.c                      |  23 +-
>  drivers/crypto/bcm/spu.h                      |   1 -
>  drivers/crypto/bcm/spu2.c                     |  12 +-
>  drivers/crypto/bcm/spu2.h                     |   1 -
>  drivers/crypto/n2_core.c                      |  46 ---
>  drivers/net/wireless/intel/ipw2x00/Kconfig    |   4 -
>  drivers/net/wireless/intersil/hostap/Kconfig  |   4 -
>  drivers/staging/rtl8192e/Kconfig              |   4 +-
>  drivers/staging/rtl8192e/rtllib_crypt_tkip.c  |  70 +----
>  drivers/staging/rtl8192e/rtllib_crypt_wep.c   |  72 +----
>  drivers/staging/rtl8192u/Kconfig              |   1 +
>  .../rtl8192u/ieee80211/ieee80211_crypt_tkip.c |  81 +----
>  .../rtl8192u/ieee80211/ieee80211_crypt_wep.c  |  64 +---
>  include/linux/sunrpc/gss_krb5.h               |  11 -
>  include/linux/sunrpc/gss_krb5_enctypes.h      |   9 +-
>  net/sunrpc/Kconfig                            |   1 -
>  net/sunrpc/auth_gss/gss_krb5_crypto.c         | 276 ------------------
>  net/sunrpc/auth_gss/gss_krb5_mech.c           |  95 ------
>  net/sunrpc/auth_gss/gss_krb5_seal.c           |   1 -
>  net/sunrpc/auth_gss/gss_krb5_seqnum.c         |  87 ------
>  net/sunrpc/auth_gss/gss_krb5_unseal.c         |   1 -
>  net/sunrpc/auth_gss/gss_krb5_wrap.c           |  65 +----
>  26 files changed, 97 insertions(+), 949 deletions(-)

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

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