Re: [dpdk-dev] [PATCH] aesni_mb: fix out-of-bounds access

["De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>]

Hi Fan,

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Fan Zhang
> Sent: Wednesday, May 15, 2019 4:33 PM
> To: dev@dpdk.org
> Cc: akhil.goyal@nxp.com; Zhang, Roy Fan <roy.fan.zhang@intel.com>
> Subject: [dpdk-dev] [PATCH] aesni_mb: fix out-of-bounds access
> 
> This patch fixes the out-of-bounds coverity issue by adding missed
> algorithms to the array.
> 
> Coverity issue: 337683
> 
> Fixes: c68d7aa354f6 ("crypto/aesni_mb: use architecture independent
> macros")
> 
> Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
> ---
>  drivers/crypto/aesni_mb/rte_aesni_mb_pmd_private.h | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/crypto/aesni_mb/rte_aesni_mb_pmd_private.h
> b/drivers/crypto/aesni_mb/rte_aesni_mb_pmd_private.h
> index 4d439360f..c937b21b6 100644
> --- a/drivers/crypto/aesni_mb/rte_aesni_mb_pmd_private.h
> +++ b/drivers/crypto/aesni_mb/rte_aesni_mb_pmd_private.h
> @@ -65,7 +65,13 @@ static const unsigned
> auth_truncated_digest_byte_lengths[] = {
>  		[AES_XCBC]	= 12,
>  		[AES_CMAC]	= 12,
>  		[AES_CCM]	= 8,
> -		[NULL_HASH]	= 0
> +		[NULL_HASH]	= 0,
> +		[AES_GMAC]	= 12,

According to the code in the IPSec MB lib, truncated value for GMAC is 16,
although it can actually generate anything from 4 to 16 bytes,
so I guess any value between this range could work.

> +		[PLAIN_SHA1]	= 20,
> +		[PLAIN_SHA_224]	= 28,
> +		[PLAIN_SHA_256]	= 32,
> +		[PLAIN_SHA_384]	= 48,
> +		[PLAIN_SHA_512]	= 64
>  };
> 

Could you also complete the other two arrays?
auth_digest_byte_lengths (missing AES_CCM) and auth_blocksize.

Thanks!
Pablo

>  /**
> --
> 2.14.5