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Add overflow check for maximum key slot length

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Signed-off-by: David Horstmann <david.horstmann@arm.com>
This commit is contained in:
David Horstmann 2024-08-21 15:38:44 +01:00 committed by Gilles Peskine
parent 68a4b7453f
commit 0b2bd071f8
1 changed files with 5 additions and 0 deletions

5
tf-psa-crypto/core/psa_crypto_slot_management.c

@ -111,6 +111,11 @@ MBEDTLS_STATIC_ASSERT(PSA_KEY_ID_VOLATILE_MAX < MBEDTLS_PSA_KEY_ID_BUILTIN_MIN |
#error "Slice index does not fit in uint8_t for psa_key_slot_t::slice_index"
#endif
MBEDTLS_STATIC_ASSERT((KEY_SLOT_VOLATILE_SLICE_BASE_LENGTH
& (SIZE_MAX >> (KEY_SLOT_VOLATILE_SLICE_COUNT - 1)))
== KEY_SLOT_VOLATILE_SLICE_BASE_LENGTH,
"Maximum slice length overflows size_t");
/* Calculate the volatile key id to use for a given slot.
* This function assumes valid parameter values. */