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psa-core: properly set PSA_CRYPTO_MAX_STORAGE_SIZE

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If MBEDTLS_PSA_STATIC_KEY_SLOTS is set then limit PSA_CRYPTO_MAX_STORAGE_SIZE
to MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE, otherwise keep the previous
PSA_BITS_TO_BYTES(PSA_MAX_KEY_BITS) size.

This commit also removes changes to test_suite_psa_crypto_persistent_key.data
done previously since MBEDTLS_PSA_STATIC_KEY_SLOTS is always up to date
with key buffer size.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
2024-08-13 14:35:30 +02:00
parent f7485fbba1
commit 1980bb781e
2 changed files with 11 additions and 11 deletions
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12
library/psa_crypto_storage.h
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@ -17,13 +17,21 @@ extern "C" {
#include "psa/crypto.h"
#include "psa/crypto_se_driver.h"
#include "psa_crypto_core.h"
#include <stdint.h>
#include <string.h>
/* Limit the maximum key size in storage. This should have no effect
* since the key size is limited in memory. */
/* Limit the maximum key size in storage. */
#if defined(MBEDTLS_PSA_STATIC_KEY_SLOTS)
/* Reflect the maximum size for the key buffer. */
#define PSA_CRYPTO_MAX_STORAGE_SIZE (MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE)
#else
/* Just set an upper boundary but it should have no effect since the key size
* is limited in memory. */
#define PSA_CRYPTO_MAX_STORAGE_SIZE (PSA_BITS_TO_BYTES(PSA_MAX_KEY_BITS))
#endif
/* Sanity check: a file size must fit in 32 bits. Allow a generous
* 64kB of metadata. */
#if PSA_CRYPTO_MAX_STORAGE_SIZE > 0xffff0000