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crypto: stm32/cryp - update to return iv_out 

The kernel crypto API request output the next IV data to
IV buffer for CBC implementation.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Lionel Debieve 2019-04-24 15:34:53 +02:00 committed by Herbert Xu
parent 29aed438e8
commit 5f49f18d27
1 changed files with 20 additions and 0 deletions
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20
drivers/crypto/stm32/stm32-cryp.c
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@ -393,6 +393,23 @@ static void stm32_cryp_hw_write_iv(struct stm32_cryp *cryp, u32 *iv)
} }
} }
static void stm32_cryp_get_iv(struct stm32_cryp *cryp)
{
struct ablkcipher_request *req = cryp->req;
u32 *tmp = req->info;
if (!tmp)
return;
*tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0LR));
*tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0RR));
if (is_aes(cryp)) {
*tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1LR));
*tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1RR));
}
}
static void stm32_cryp_hw_write_key(struct stm32_cryp *c) static void stm32_cryp_hw_write_key(struct stm32_cryp *c)
{ {
unsigned int i; unsigned int i;
@ -622,6 +639,9 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err)
/* Phase 4 : output tag */ /* Phase 4 : output tag */
err = stm32_cryp_read_auth_tag(cryp); err = stm32_cryp_read_auth_tag(cryp);
if (!err && (!(is_gcm(cryp) || is_ccm(cryp))))
stm32_cryp_get_iv(cryp);
if (cryp->sgs_copied) { if (cryp->sgs_copied) {
void *buf_in, *buf_out; void *buf_in, *buf_out;
int pages, len; int pages, len;