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Crypto/chcr: fix gcm-aes and rfc4106-gcm failed tests 

This patch fixes two issues observed during self tests with
CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.

1. gcm(aes) hang issue , that happens during decryption.
2. rfc4106-gcm-aes-chcr encryption unexpectedly succeeded.

For gcm-aes decryption , authtag is not mapped due to
sg_nents_for_len(upto size: assoclen+ cryptlen - authsize).
So fix it by dma_mapping authtag.
Also replaced sg_nents() to sg_nents_for_len() in case of aead_dma_unmap().

For rfc4106-gcm-aes-chcr, used crypto_ipsec_check_assoclen() for checking
the validity of assoclen.

Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Devulapally Shiva Krishna <shiva@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Devulapally Shiva Krishna 2020-05-05 08:42:53 +05:30 committed by David S. Miller
parent 33395f4a5c
commit d91a3159e8
1 changed files with 12 additions and 4 deletions
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16
drivers/crypto/chelsio/chcr_algo.c
View File

@ -2556,7 +2556,7 @@ int chcr_aead_dma_map(struct device *dev,
int dst_size;
dst_size = req->assoclen + req->cryptlen + (op_type ?
-authsize : authsize);
0 : authsize);
if (!req->cryptlen || !dst_size)
return 0;
reqctx->iv_dma = dma_map_single(dev, reqctx->iv, (IV + reqctx->b0_len),
@ -2603,15 +2603,16 @@ void chcr_aead_dma_unmap(struct device *dev,
int dst_size;
dst_size = req->assoclen + req->cryptlen + (op_type ?
-authsize : authsize);
0 : authsize);
if (!req->cryptlen || !dst_size)
return;
dma_unmap_single(dev, reqctx->iv_dma, (IV + reqctx->b0_len),
DMA_BIDIRECTIONAL);
if (req->src == req->dst) {
dma_unmap_sg(dev, req->src, sg_nents(req->src),
DMA_BIDIRECTIONAL);
dma_unmap_sg(dev, req->src,
sg_nents_for_len(req->src, dst_size),
DMA_BIDIRECTIONAL);
} else {
dma_unmap_sg(dev, req->src, sg_nents(req->src),
DMA_TO_DEVICE);
@ -3702,6 +3703,13 @@ static int chcr_aead_op(struct aead_request *req,
return -ENOSPC;
}
if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 &&
crypto_ipsec_check_assoclen(req->assoclen) != 0) {
pr_err("RFC4106: Invalid value of assoclen %d\n",
req->assoclen);
return -EINVAL;
}
/* Form a WR from req */
skb = create_wr_fn(req, u_ctx->lldi.rxq_ids[reqctx->rxqidx], size);