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Crypto/chcr: Fixes compilations warnings

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This patch fixes the compilation warnings displayed by sparse tool for
chcr driver.

V1->V2

Avoid type casting by using get_unaligned_be32() and
put_unaligned_be16/32() functions.

The key which comes from stack is an u8 byte stream so we store it in
an unsigned char array(ablkctx->key). The function get_aes_decrypt_key()
is a used to calculate  the reverse round key for decryption, for this
operation the key has to be divided into 4 bytes, so to extract 4 bytes
from an u8 byte stream and store it in an u32 variable, get_aligned_be32()
is used. Similarly for copying back the key from u32 variable to the
original u8 key stream, put_aligned_be32() is used.

Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ayush Sawal 2020-06-01 23:11:58 +05:30 committed by David S. Miller
parent 76d7728db7
commit f3b140ad85
2 changed files with 5 additions and 7 deletions
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10
drivers/crypto/chelsio/chcr_algo.c
View File

@ -256,7 +256,7 @@ static void get_aes_decrypt_key(unsigned char *dec_key,
return;
}
for (i = 0; i < nk; i++)
w_ring[i] = be32_to_cpu(*(u32 *)&key[4 * i]);
w_ring[i] = get_unaligned_be32(&key[i * 4]);
i = 0;
temp = w_ring[nk - 1];
@ -275,7 +275,7 @@ static void get_aes_decrypt_key(unsigned char *dec_key,
}
i--;
for (k = 0, j = i % nk; k < nk; k++) {
*((u32 *)dec_key + k) = htonl(w_ring[j]);
put_unaligned_be32(w_ring[j], &dec_key[k * 4]);
j--;
if (j < 0)
j += nk;
@ -2926,8 +2926,7 @@ static int ccm_format_packet(struct aead_request *req,
memcpy(ivptr, req->iv, 16);
}
if (assoclen)
*((unsigned short *)(reqctx->scratch_pad + 16)) =
htons(assoclen);
put_unaligned_be16(assoclen, &reqctx->scratch_pad[16]);
rc = generate_b0(req, ivptr, op_type);
/* zero the ctr value */
@ -3201,8 +3200,7 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req,
} else {
memcpy(ivptr, req->iv, GCM_AES_IV_SIZE);
}
*((unsigned int *)(ivptr + 12)) = htonl(0x01);
put_unaligned_be32(0x01, &ivptr[12]);
ulptx = (struct ulptx_sgl *)(ivptr + 16);
chcr_add_aead_dst_ent(req, phys_cpl, qid);

2
drivers/crypto/chelsio/chcr_ipsec.c
View File

@ -403,7 +403,7 @@ inline void *copy_esn_pktxt(struct sk_buff *skb,
xo = xfrm_offload(skb);
aadiv->spi = (esphdr->spi);
seqlo = htonl(esphdr->seq_no);
seqlo = ntohl(esphdr->seq_no);
seqno = cpu_to_be64(seqlo + ((u64)xo->seq.hi << 32));
memcpy(aadiv->seq_no, &seqno, 8);
iv = skb_transport_header(skb) + sizeof(struct ip_esp_hdr);