redonkable/alistair23-linux
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crypto: stm32 - Fix sparse warnings

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This patch fixes most of the sparse endianness warnings in stm32.
The patch itself doesn't change anything apart from markings,
but there is some questionable code in stm32_cryp_check_ctr_counter.

That function operates on the counters as if they're in CPU order,
however, they're then written out as big-endian.  This looks like
a genuine bug.  Therefore I've left that warning alone until
someone can confirm that this really does work as intended on
little-endian.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2020-08-21 23:59:12 +10:00
parent b7b57a5643
commit bbb2832620
3 changed files with 32 additions and 24 deletions
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5
drivers/crypto/stm32/stm32-crc32.c
View file

@ -218,9 +218,8 @@ static int stm32_crc_update(struct shash_desc *desc, const u8 *d8,
return burst_update(desc, d8, length);
/* Digest first bytes not 32bit aligned at first pass in the loop */
size = min(length,
burst_sz + (unsigned int)d8 - ALIGN_DOWN((unsigned int)d8,
sizeof(u32)));
size = min_t(size_t, length, burst_sz + (size_t)d8 -
ALIGN_DOWN((size_t)d8, sizeof(u32)));
for (rem_sz = length, cur = d8; rem_sz;
rem_sz -= size, cur += size, size = min(rem_sz, burst_sz)) {
ret = burst_update(desc, cur, size);

47
drivers/crypto/stm32/stm32-cryp.c
View file

@ -118,7 +118,7 @@ struct stm32_cryp_ctx {
struct crypto_engine_ctx enginectx;
struct stm32_cryp *cryp;
int keylen;
u32 key[AES_KEYSIZE_256 / sizeof(u32)];
__be32 key[AES_KEYSIZE_256 / sizeof(u32)];
unsigned long flags;
};
@ -380,24 +380,24 @@ static int stm32_cryp_copy_sgs(struct stm32_cryp *cryp)
return 0;
}
static void stm32_cryp_hw_write_iv(struct stm32_cryp *cryp, u32 *iv)
static void stm32_cryp_hw_write_iv(struct stm32_cryp *cryp, __be32 *iv)
{
if (!iv)
return;
stm32_cryp_write(cryp, CRYP_IV0LR, cpu_to_be32(*iv++));
stm32_cryp_write(cryp, CRYP_IV0RR, cpu_to_be32(*iv++));
stm32_cryp_write(cryp, CRYP_IV0LR, be32_to_cpu(*iv++));
stm32_cryp_write(cryp, CRYP_IV0RR, be32_to_cpu(*iv++));
if (is_aes(cryp)) {
stm32_cryp_write(cryp, CRYP_IV1LR, cpu_to_be32(*iv++));
stm32_cryp_write(cryp, CRYP_IV1RR, cpu_to_be32(*iv++));
stm32_cryp_write(cryp, CRYP_IV1LR, be32_to_cpu(*iv++));
stm32_cryp_write(cryp, CRYP_IV1RR, be32_to_cpu(*iv++));
}
}
static void stm32_cryp_get_iv(struct stm32_cryp *cryp)
{
struct skcipher_request *req = cryp->req;
u32 *tmp = (void *)req->iv;
__be32 *tmp = (void *)req->iv;
if (!tmp)
return;
@ -417,13 +417,13 @@ static void stm32_cryp_hw_write_key(struct stm32_cryp *c)
int r_id;
if (is_des(c)) {
stm32_cryp_write(c, CRYP_K1LR, cpu_to_be32(c->ctx->key[0]));
stm32_cryp_write(c, CRYP_K1RR, cpu_to_be32(c->ctx->key[1]));
stm32_cryp_write(c, CRYP_K1LR, be32_to_cpu(c->ctx->key[0]));
stm32_cryp_write(c, CRYP_K1RR, be32_to_cpu(c->ctx->key[1]));
} else {
r_id = CRYP_K3RR;
for (i = c->ctx->keylen / sizeof(u32); i > 0; i--, r_id -= 4)
stm32_cryp_write(c, r_id,
cpu_to_be32(c->ctx->key[i - 1]));
be32_to_cpu(c->ctx->key[i - 1]));
}
}
@ -469,7 +469,7 @@ static unsigned int stm32_cryp_get_input_text_len(struct stm32_cryp *cryp)
static int stm32_cryp_gcm_init(struct stm32_cryp *cryp, u32 cfg)
{
int ret;
u32 iv[4];
__be32 iv[4];
/* Phase 1 : init */
memcpy(iv, cryp->areq->iv, 12);
@ -491,6 +491,7 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
{
int ret;
u8 iv[AES_BLOCK_SIZE], b0[AES_BLOCK_SIZE];
__be32 *bd;
u32 *d;
unsigned int i, textlen;
@ -498,7 +499,7 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
memcpy(iv, cryp->areq->iv, AES_BLOCK_SIZE);
memset(iv + AES_BLOCK_SIZE - 1 - iv[0], 0, iv[0] + 1);
iv[AES_BLOCK_SIZE - 1] = 1;
stm32_cryp_hw_write_iv(cryp, (u32 *)iv);
stm32_cryp_hw_write_iv(cryp, (__be32 *)iv);
/* Build B0 */
memcpy(b0, iv, AES_BLOCK_SIZE);
@ -518,11 +519,14 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
/* Write B0 */
d = (u32 *)b0;
bd = (__be32 *)b0;
for (i = 0; i < AES_BLOCK_32; i++) {
u32 xd = d[i];
if (!cryp->caps->padding_wa)
*d = cpu_to_be32(*d);
stm32_cryp_write(cryp, CRYP_DIN, *d++);
xd = be32_to_cpu(bd[i]);
stm32_cryp_write(cryp, CRYP_DIN, xd);
}
/* Wait for end of processing */
@ -617,7 +621,7 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
case CR_TDES_CBC:
case CR_AES_CBC:
case CR_AES_CTR:
stm32_cryp_hw_write_iv(cryp, (u32 *)cryp->req->iv);
stm32_cryp_hw_write_iv(cryp, (__be32 *)cryp->req->iv);
break;
default:
@ -1120,7 +1124,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
/* GCM: write aad and payload size (in bits) */
size_bit = cryp->areq->assoclen * 8;
if (cryp->caps->swap_final)
size_bit = cpu_to_be32(size_bit);
size_bit = (__force u32)cpu_to_be32(size_bit);
stm32_cryp_write(cryp, CRYP_DIN, 0);
stm32_cryp_write(cryp, CRYP_DIN, size_bit);
@ -1129,7 +1133,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
cryp->areq->cryptlen - AES_BLOCK_SIZE;
size_bit *= 8;
if (cryp->caps->swap_final)
size_bit = cpu_to_be32(size_bit);
size_bit = (__force u32)cpu_to_be32(size_bit);
stm32_cryp_write(cryp, CRYP_DIN, 0);
stm32_cryp_write(cryp, CRYP_DIN, size_bit);
@ -1137,14 +1141,19 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
/* CCM: write CTR0 */
u8 iv[AES_BLOCK_SIZE];
u32 *iv32 = (u32 *)iv;
__be32 *biv;
biv = (void *)iv;
memcpy(iv, cryp->areq->iv, AES_BLOCK_SIZE);
memset(iv + AES_BLOCK_SIZE - 1 - iv[0], 0, iv[0] + 1);
for (i = 0; i < AES_BLOCK_32; i++) {
u32 xiv = iv32[i];
if (!cryp->caps->padding_wa)
*iv32 = cpu_to_be32(*iv32);
stm32_cryp_write(cryp, CRYP_DIN, *iv32++);
xiv = be32_to_cpu(biv[i]);
stm32_cryp_write(cryp, CRYP_DIN, xiv);
}
}

4
drivers/crypto/stm32/stm32-hash.c
View file

@ -749,7 +749,7 @@ static int stm32_hash_final_req(struct stm32_hash_dev *hdev)
static void stm32_hash_copy_hash(struct ahash_request *req)
{
struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
u32 *hash = (u32 *)rctx->digest;
__be32 *hash = (void *)rctx->digest;
unsigned int i, hashsize;
switch (rctx->flags & HASH_FLAGS_ALGO_MASK) {
@ -770,7 +770,7 @@ static void stm32_hash_copy_hash(struct ahash_request *req)
}
for (i = 0; i < hashsize / sizeof(u32); i++)
hash[i] = be32_to_cpu(stm32_hash_read(rctx->hdev,
hash[i] = cpu_to_be32(stm32_hash_read(rctx->hdev,
HASH_HREG(i)));
}