[PATCH v2 1/3] crypto: api - Adjust HASH_MAX_DESCSIZE for s390-phmac context

Harald Freudenberger
2024-11-05T14:03:43Z

The phmac context exceeds the generic "worst case".
Change this define to cover the s390 specific 'phmac(sha512)'
which is a "protected" key hmac-sha2 implementation.

Signed-off-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
---
include/crypto/hash.h | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 2d5ea9f9ff43..5b724dd7c5a7 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -159,10 +159,9 @@ struct shash_desc {
#define HASH_MAX_DIGESTSIZE 64

/*
- * Worst case is hmac(sha3-224-generic). Its context is a nested 'shash_desc'
- * containing a 'struct sha3_state'.
+ * The max case is currently the s390 specific shash 'phmac(sha512)'.
*/
-#define HASH_MAX_DESCSIZE (sizeof(struct shash_desc) + 360)
+#define HASH_MAX_DESCSIZE (sizeof(struct shash_desc) + 376)

#define SHASH_DESC_ON_STACK(shash, ctx) \
char __##shash##_desc[sizeof(struct shash_desc) + HASH_MAX_DESCSIZE] \
--
2.43.0