[PATCH 0/2] crypto: stm32/hash: Fix bug in hmac mode

[PATCH 0/2] crypto: stm32/hash: Fix bug in hmac mode

[Lionel Debieve]

This series fixes issues discovered while using libkcapi library. Some
more tests show wrong key management in hmac mode. It is fixes by these 
patches and prevent a potential issue in case of interrupt while processing
in dma mode.

Lionel Debieve (2):
  crypto: stm32/hash: Fix hmac issue more than 256 bytes
  crypto: stm32/hash: remove interruptible condition for dma

 drivers/crypto/stm32/stm32-hash.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

-- 
2.17.1


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[PATCH 1/2] crypto: stm32/hash: Fix hmac issue more than 256 bytes

[Lionel Debieve]

Correct condition for the second hmac loop. Key must be only
set in the first loop. Initial condition was wrong,
HMAC_KEY flag was not properly checked.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
---
 drivers/crypto/stm32/stm32-hash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 29519d1c403f..c37d1a336f98 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -349,7 +349,7 @@ static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev,
 		return -ETIMEDOUT;
 
 	if ((hdev->flags & HASH_FLAGS_HMAC) &&
-	    (hdev->flags & ~HASH_FLAGS_HMAC_KEY)) {
+	    (!(hdev->flags & HASH_FLAGS_HMAC_KEY))) {
 		hdev->flags |= HASH_FLAGS_HMAC_KEY;
 		stm32_hash_write_key(hdev);
 		if (stm32_hash_wait_busy(hdev))
-- 
2.17.1


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[PATCH 2/2] crypto: stm32/hash: remove interruptible condition for dma

[Lionel Debieve]

When DMA is used, waiting for completion must not be
interruptible as it can generate an error that is not handle
by the driver. There is no need to put the completion
interruptible in this driver.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
---
 drivers/crypto/stm32/stm32-hash.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index c37d1a336f98..23061f2bc74b 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -447,8 +447,8 @@ static int stm32_hash_xmit_dma(struct stm32_hash_dev *hdev,
 
 	dma_async_issue_pending(hdev->dma_lch);
 
-	if (!wait_for_completion_interruptible_timeout(&hdev->dma_completion,
-						       msecs_to_jiffies(100)))
+	if (!wait_for_completion_timeout(&hdev->dma_completion,
+					 msecs_to_jiffies(100)))
 		err = -ETIMEDOUT;
 
 	if (dma_async_is_tx_complete(hdev->dma_lch, cookie,
-- 
2.17.1


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Re: [PATCH 0/2] crypto: stm32/hash: Fix bug in hmac mode

[Herbert Xu]

On Fri, Jun 28, 2019 at 01:26:53PM +0200, Lionel Debieve wrote:
> This series fixes issues discovered while using libkcapi library. Some
> more tests show wrong key management in hmac mode. It is fixes by these 
> patches and prevent a potential issue in case of interrupt while processing
> in dma mode.
> 
> Lionel Debieve (2):
>   crypto: stm32/hash: Fix hmac issue more than 256 bytes
>   crypto: stm32/hash: remove interruptible condition for dma
> 
>  drivers/crypto/stm32/stm32-hash.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

All applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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