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test_suite_pk: add description for psa_pub_key_from_priv()

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2024-02-28 16:32:01 +01:00
parent 42a58a5249
commit 4114a54403
1 changed files with 8 additions and 2 deletions
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10
tests/suites/test_suite_pk.function
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@ -428,6 +428,14 @@ exit:
#endif #endif
#if defined(MBEDTLS_PSA_CRYPTO_C) #if defined(MBEDTLS_PSA_CRYPTO_C)
/* Create a new PSA key which will contain only the public part of the private
* key which is provided in input. For this new key:
* - Type is the public counterpart of the private key.
* - Usage is the copied from the original private key, but the PSA_KEY_USAGE_EXPORT
* flag is removed. This is to prove that public keys are always exportable
* even if the EXPORT flag is not explicitly set.
* - Algorithm is copied from the original key pair.
*/
static mbedtls_svc_key_id_t psa_pub_key_from_priv(mbedtls_svc_key_id_t priv_id) static mbedtls_svc_key_id_t psa_pub_key_from_priv(mbedtls_svc_key_id_t priv_id)
{ {
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
@ -452,8 +460,6 @@ static mbedtls_svc_key_id_t psa_pub_key_from_priv(mbedtls_svc_key_id_t priv_id)
* - psa_import_key() automatically determines the key's bit length * - psa_import_key() automatically determines the key's bit length
* from the provided key data. That's why psa_set_key_bits() is not used * from the provided key data. That's why psa_set_key_bits() is not used
* below. * below.
* - public keys are always exportable by default even if PSA_KEY_USAGE_EXPORT
* is not set.
*/ */
type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(type); type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(type);
usage &= ~PSA_KEY_USAGE_EXPORT; usage &= ~PSA_KEY_USAGE_EXPORT;