diff options
| author | Lionel Debieve <lionel.debieve@st.com> | 2019-04-24 16:34:53 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-05-03 09:03:29 +0300 |
| commit | 5f49f18d27cd6d49c52f2805cd79c2362710a2e9 (patch) | |
| tree | 3e6d8ac9a6b88db4682770a516e08530acb7d9af /drivers | |
| parent | 29aed438e8702096a2dda3c5aed88e9176656be7 (diff) | |
| download | linux-5f49f18d27cd6d49c52f2805cd79c2362710a2e9.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/stm32/stm32-cryp.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c index eb525669d4eb..cddcc97875b2 100644 --- a/drivers/crypto/stm32/stm32-cryp.c +++ b/drivers/crypto/stm32/stm32-cryp.c @@ -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) { unsigned int i; @@ -622,6 +639,9 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err) /* Phase 4 : output tag */ err = stm32_cryp_read_auth_tag(cryp); + if (!err && (!(is_gcm(cryp) || is_ccm(cryp)))) + stm32_cryp_get_iv(cryp); + if (cryp->sgs_copied) { void *buf_in, *buf_out; int pages, len; |