Re: [PATCH 2/7] crypto: stm32 - add new algorithms support

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Hi Linus,

Did you run your test only with the patch adding the support for STM32MP13 or did you try the whole patch set ?

The error is on the test vector number 4, which is an HASH of 64 bytes which is exactly the size of a blcok for SHA1.

Did you try to run the test for SHA256 ? (I guess you will see the same error on test vector 4)

I have two hypothesis :
- it could be related to the padding of the data. (I don't think, the patch does not modify these lines) - it could come from the way the first block of data is handle. To start the first pre computation, we have to write 1 block + 1 word. The test only write one block so maybe the issue is here.

On 7/6/23 09:37, Thomas BOURGOIN wrote:
> +		/*
> +		 * After first block + 1 words are fill up,
> +		 * we only need to fill 1 block to start partial computation
> +		 */
> +		rctx->state.blocklen -= sizeof(u32);
> +

I found a typo in the number of CSR to save/restore for the SHA1 and SHA256 algorithm. It should be 38 instead of 22.
Tell me if it fixes the regression.

It could be possible to divide the patch in 2 (one patch rework preparing MP13 and one patch with the new algorithm) but for the upstream I do not know if it is relevant to have 2 patches instead of one.

Best regards,

Thomas

---
 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 a50d73c18d5c..88a186c3dd78 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -74,7 +74,7 @@

 /* Context swap register */
 #define HASH_CSR_NB_SHA256_HMAC		54
-#define HASH_CSR_NB_SHA256		22
+#define HASH_CSR_NB_SHA256		38
 #define HASH_CSR_NB_SHA512_HMAC		103
 #define HASH_CSR_NB_SHA512		91
 #define HASH_CSR_NB_SHA3_HMAC		88
--
2.25.1





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