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crypto: talitos - Avoid consecutive packets going out with same IV 

The SEC's h/w IV out implementation DMAs the trailing encrypted payload
block of the last encryption to ctx->iv.  Since the last encryption may
still be pending completion, we can sufficiently prevent successive
packets from being transmitted with the same IV by xoring with sequence
number.

Also initialize alg_list earlier to prevent oopsing on a failed probe.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kim Phillips 2008-09-14 13:41:19 -07:00 committed by Herbert Xu
parent 6bfb09a100
commit ba95487df9
1 changed files with 4 additions and 2 deletions
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6
drivers/crypto/talitos.c
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@ -1157,6 +1157,8 @@ static int aead_authenc_givencrypt(
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
/* avoid consecutive packets going out with same IV */
*(__be64 *)req->giv ^= cpu_to_be64(req->seq);
return ipsec_esp(edesc, areq, req->giv, req->seq,
ipsec_esp_encrypt_done);
@ -1449,6 +1451,8 @@ static int talitos_probe(struct of_device *ofdev,
priv->ofdev = ofdev;
INIT_LIST_HEAD(&priv->alg_list);
tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
tasklet_init(&priv->error_task, talitos_error, (unsigned long)dev);
@ -1575,8 +1579,6 @@ static int talitos_probe(struct of_device *ofdev,
}
/* register crypto algorithms the device supports */
INIT_LIST_HEAD(&priv->alg_list);
for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
struct talitos_crypto_alg *t_alg;