Messages in this thread Patch in this message | | | From | Nicolas Toromanoff <> | Subject | [PATCH v4 4/9] crypto: stm32/cryp - fix xts and race condition in crypto_engine requests | Date | Tue, 30 Nov 2021 08:54:56 +0100 |
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Don't erase key: If key is erased before the crypto_finalize_.*_request() call, some pending process will run with a key={ 0 }. Moreover if the key is reset at end of request, it breaks xts chaining mode, as for last xts block (in case input len is not a multiple of block) a new AES request is started without calling again set_key().
Fixes: 9e054ec21ef8 ("crypto: stm32 - Support for STM32 CRYP crypto module")
Signed-off-by: Nicolas Toromanoff <nicolas.toromanoff@foss.st.com> --- drivers/crypto/stm32/stm32-cryp.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c index ab4a107a0860..b2b553651964 100644 --- a/drivers/crypto/stm32/stm32-cryp.c +++ b/drivers/crypto/stm32/stm32-cryp.c @@ -674,8 +674,6 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err) else crypto_finalize_skcipher_request(cryp->engine, cryp->req, err); - - memset(cryp->ctx->key, 0, cryp->ctx->keylen); } static int stm32_cryp_cpu_start(struct stm32_cryp *cryp) -- 2.17.1
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