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psa: Move get_key_slot functions

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Move the psa_get_key_slot and related static functions as they will need
to call psa_import_key_into_slot() for persistent keys.
This commit is contained in:
Darryl Green 2018-07-16 11:21:11 +01:00
parent 940d72c3e8
commit 06fd18de37
1 changed files with 70 additions and 70 deletions
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140
library/psa_crypto.c
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@ -361,76 +361,6 @@ static psa_status_t mbedtls_to_psa_error( int ret )
}
}
/* Retrieve a key slot, occupied or not. */
static psa_status_t psa_get_key_slot( psa_key_slot_t key,
key_slot_t **p_slot )
{
GUARD_MODULE_INITIALIZED;
/* 0 is not a valid slot number under any circumstance. This
* implementation provides slots number 1 to N where N is the
* number of available slots. */
if( key == 0 || key > ARRAY_LENGTH( global_data.key_slots ) )
return( PSA_ERROR_INVALID_ARGUMENT );
*p_slot = &global_data.key_slots[key - 1];
return( PSA_SUCCESS );
}
/* Retrieve an empty key slot (slot with no key data, but possibly
* with some metadata such as a policy). */
static psa_status_t psa_get_empty_key_slot( psa_key_slot_t key,
key_slot_t **p_slot )
{
psa_status_t status;
key_slot_t *slot = NULL;
*p_slot = NULL;
status = psa_get_key_slot( key, &slot );
if( status != PSA_SUCCESS )
return( status );
if( slot->type != PSA_KEY_TYPE_NONE )
return( PSA_ERROR_OCCUPIED_SLOT );
*p_slot = slot;
return( status );
}
/** Retrieve a slot which must contain a key. The key must have allow all the
* usage flags set in \p usage. If \p alg is nonzero, the key must allow
* operations with this algorithm. */
static psa_status_t psa_get_key_from_slot( psa_key_slot_t key,
key_slot_t **p_slot,
psa_key_usage_t usage,
psa_algorithm_t alg )
{
psa_status_t status;
key_slot_t *slot = NULL;
*p_slot = NULL;
status = psa_get_key_slot( key, &slot );
if( status != PSA_SUCCESS )
return( status );
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
/* Enforce that usage policy for the key slot contains all the flags
* required by the usage parameter. There is one exception: public
* keys can always be exported, so we treat public key objects as
* if they had the export flag. */
if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) )
usage &= ~PSA_KEY_USAGE_EXPORT;
if( ( slot->policy.usage & usage ) != usage )
return( PSA_ERROR_NOT_PERMITTED );
if( alg != 0 && ( alg != slot->policy.alg ) )
return( PSA_ERROR_NOT_PERMITTED );
*p_slot = slot;
return( PSA_SUCCESS );
}
@ -772,6 +702,76 @@ static psa_status_t psa_import_key_into_slot( key_slot_t *slot,
return( PSA_SUCCESS );
}
/* Retrieve a key slot, occupied or not. */
static psa_status_t psa_get_key_slot( psa_key_slot_t key,
key_slot_t **p_slot )
{
GUARD_MODULE_INITIALIZED;
/* 0 is not a valid slot number under any circumstance. This
* implementation provides slots number 1 to N where N is the
* number of available slots. */
if( key == 0 || key > ARRAY_LENGTH( global_data.key_slots ) )
return( PSA_ERROR_INVALID_ARGUMENT );
*p_slot = &global_data.key_slots[key - 1];
return( PSA_SUCCESS );
}
/* Retrieve an empty key slot (slot with no key data, but possibly
* with some metadata such as a policy). */
static psa_status_t psa_get_empty_key_slot( psa_key_slot_t key,
key_slot_t **p_slot )
{
psa_status_t status;
key_slot_t *slot = NULL;
*p_slot = NULL;
status = psa_get_key_slot( key, &slot );
if( status != PSA_SUCCESS )
return( status );
if( slot->type != PSA_KEY_TYPE_NONE )
return( PSA_ERROR_OCCUPIED_SLOT );
*p_slot = slot;
return( status );
}
/** Retrieve a slot which must contain a key. The key must have allow all the
* usage flags set in \p usage. If \p alg is nonzero, the key must allow
* operations with this algorithm. */
static psa_status_t psa_get_key_from_slot( psa_key_slot_t key,
key_slot_t **p_slot,
psa_key_usage_t usage,
psa_algorithm_t alg )
{
psa_status_t status;
key_slot_t *slot = NULL;
*p_slot = NULL;
status = psa_get_key_slot( key, &slot );
if( status != PSA_SUCCESS )
return( status );
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
/* Enforce that usage policy for the key slot contains all the flags
* required by the usage parameter. There is one exception: public
* keys can always be exported, so we treat public key objects as
* if they had the export flag. */
if( PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) )
usage &= ~PSA_KEY_USAGE_EXPORT;
if( ( slot->policy.usage & usage ) != usage )
return( PSA_ERROR_NOT_PERMITTED );
if( alg != 0 && ( alg != slot->policy.alg ) )
return( PSA_ERROR_NOT_PERMITTED );
*p_slot = slot;
return( PSA_SUCCESS );
}
psa_status_t psa_import_key( psa_key_slot_t key,
psa_key_type_t type,