[dpdk-dev] [PATCH] examples/l2fwd-crypto: fix verify with decrypt in chain

[Jastrzebski, MichalX K]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Piotr Azarewicz
> Sent: Wednesday, October 12, 2016 10:59 AM
> To: De Lara Guarch, Pablo <pablo.de.lara.guarch at intel.com>; Yang, GangX
> <gangx.yang at intel.com>
> Cc: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] examples/l2fwd-crypto: fix verify with decrypt
> in chain
> 
> This patch fix setting crypto operation data parameters in l2fwd-crypto
> application.
> From now decryption in chain with auth verify work fine.
> 
> How to reproduce the issue:
> 
> 1. Run l2fwd_crypto with command:
> -c 0x3 -n 4 --vdev "crypto_aesni_mb" \
> --vdev "crypto_aesni_mb" \
> -- -p 0x3 --chain CIPHER_HASH \
> --cipher_op ENCRYPT --cipher_algo AES_CBC \
> --cipher_key 00:01:02:03:04:05:06:07:08:09:0a:0b:0c:0d:0e:0f \
> --iv 00:01:02:03:04:05:06:07:08:09:0a:0b:0c:0d:0e:ff \
> --auth_op GENERATE --auth_algo SHA1_HMAC \
> --auth_key
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11
> 
> 2. Send packet with payload and capture forwarded packet.
> Payload in forwarded packet is encrypted, what is good.
> 
> 3. Run l2fwd_crypto with command:
> -c 0x3 -n 4 --vdev "crypto_aesni_mb" \
> --vdev "crypto_aesni_mb" \
> -- -p 0x3 --chain HASH_CIPHER \
> --cipher_op DECRYPT --cipher_algo AES_CBC \
> --cipher_key 00:01:02:03:04:05:06:07:08:09:0a:0b:0c:0d:0e:0f \
> --iv 00:01:02:03:04:05:06:07:08:09:0a:0b:0c:0d:0e:ff \
> --auth_op VERIFY --auth_algo SHA1_HMAC \
> --auth_key
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:
> 11:11:11:11:11:11:11:11:11:11:11:11:11:11:11:11
> 
> 4. Send earlier captured packet and capture forwarded packet.
> Payload in newly captured packet is not decrypted, what is wrong.
> 
> Fixes: 387259bd6c67 ("examples/l2fwd-crypto: add sample application")
> 
> Signed-off-by: Piotr Azarewicz <piotrx.t.azarewicz at intel.com>
> ---
>  examples/l2fwd-crypto/main.c |   23 ++++++++---------------
>  1 file changed, 8 insertions(+), 15 deletions(-)
> 
> diff --git a/examples/l2fwd-crypto/main.c b/examples/l2fwd-crypto/main.c
> index dae45f5..43fef59 100644
> --- a/examples/l2fwd-crypto/main.c
> +++ b/examples/l2fwd-crypto/main.c
> @@ -451,6 +451,10 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf
> *m,
> 
>  	/* Zero pad data to be crypto'd so it is block aligned */
>  	data_len  = rte_pktmbuf_data_len(m) - ipdata_offset;
> +
> +	if (cparams->do_hash && cparams->hash_verify)
> +		data_len -= cparams->digest_length;
> +
>  	pad_len = data_len % cparams->block_size ? cparams->block_size -
>  			(data_len % cparams->block_size) : 0;
> 
> @@ -472,8 +476,8 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf *m,
>  			op->sym->auth.digest.data = (uint8_t
> *)rte_pktmbuf_append(m,
>  				cparams->digest_length);
>  		} else {
> -			op->sym->auth.digest.data = (uint8_t
> *)rte_pktmbuf_append(m,
> -				cparams->digest_length);
> +			op->sym->auth.digest.data = rte_pktmbuf_mtod(m,
> +				uint8_t *) + ipdata_offset + data_len;
>  		}
> 
>  		op->sym->auth.digest.phys_addr =
> rte_pktmbuf_mtophys_offset(m,
> @@ -508,21 +512,10 @@ l2fwd_simple_crypto_enqueue(struct rte_mbuf
> *m,
>  				cparams->cipher_algo ==
> RTE_CRYPTO_CIPHER_KASUMI_F8 ||
>  				cparams->cipher_algo ==
> RTE_CRYPTO_CIPHER_ZUC_EEA3) {
>  			op->sym->cipher.data.offset = ipdata_offset << 3;
> -			if (cparams->do_hash && cparams->hash_verify)
> -				/* Do not cipher the hash tag */
> -				op->sym->cipher.data.length = (data_len -
> -					cparams->digest_length) << 3;
> -			else
> -				op->sym->cipher.data.length = data_len << 3;
> -
> +			op->sym->cipher.data.length = data_len << 3;
>  		} else {
>  			op->sym->cipher.data.offset = ipdata_offset;
> -			if (cparams->do_hash && cparams->hash_verify)
> -				/* Do not cipher the hash tag */
> -				op->sym->cipher.data.length = data_len -
> -					cparams->digest_length;
> -			else
> -				op->sym->cipher.data.length = data_len;
> +			op->sym->cipher.data.length = data_len;
>  		}
>  	}
> 
> --
> 1.7.9.5

Acked-by: Michal Jastrzebski <michalx.k.jastrzebski at intel.com>