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Document the domain_parameters_size==SIZE_MAX hack

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It was introduced in https://github.com/Mbed-TLS/mbedtls/pull/8616 but not
documented.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2023-12-18 21:01:18 +01:00
parent 8f1c36df00
commit 9deb54900e
1 changed files with 12 additions and 0 deletions
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12
include/psa/crypto_struct.h
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@ -254,6 +254,18 @@ struct psa_key_attributes_s {
#if defined(MBEDTLS_PSA_CRYPTO_SE_C) #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number); psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */ #endif /* MBEDTLS_PSA_CRYPTO_SE_C */
/* Unlike normal buffers, there are three cases for domain_parameters
* and domain_parameters_size:
* - domain_parameters_size == SIZE_MAX && domain_parameters == NULL:
* Access to domain parameters is not supported for this key.
* This is a hack which should not exist, intended for keys managed
* by a driver that doesn't support domain parameters.
* - domain_parameters_size == 0 && domain_parameters == NULL:
* The domain parameters are empty.
* - domain_parameters_size > 0 &&
* domain_parameters == valid pointer to domain_parameters_size bytes:
* The domain parameters are non-empty.
*/
void *MBEDTLS_PRIVATE(domain_parameters); void *MBEDTLS_PRIVATE(domain_parameters);
size_t MBEDTLS_PRIVATE(domain_parameters_size); size_t MBEDTLS_PRIVATE(domain_parameters_size);
}; };