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Prevent mbedtls_psa_register_se_key with volatile keys

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mbedtls_psa_register_se_key() is not usable with volatile keys, since there
is no way to return the implementation-chosen key identifier which would be
needed to use the key. Document this limitation. Reject an attempt to create
such an unusable key. Fixes #9253.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2024-06-13 16:06:45 +02:00
parent 86c603702e
commit d72ad738bd
5 changed files with 32 additions and 1 deletions
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8
library/psa_crypto.c
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@ -2149,6 +2149,14 @@ psa_status_t mbedtls_psa_register_se_key(
return PSA_ERROR_NOT_SUPPORTED;
}
/* Not usable with volatile keys, even with an appropriate location,
* due to the API design.
* https://github.com/Mbed-TLS/mbedtls/issues/9253
*/
if (PSA_KEY_LIFETIME_IS_VOLATILE(psa_get_key_lifetime(attributes))) {
return PSA_ERROR_INVALID_ARGUMENT;
}
status = psa_start_key_creation(PSA_KEY_CREATION_REGISTER, attributes,
&slot, &driver);
if (status != PSA_SUCCESS) {