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Merge pull request #292 from gilles-peskine-arm/psa-destroy_0

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Make psa_close_key(0) and psa_destroy_key(0) succeed
This commit is contained in:
Gilles Peskine 2019-10-14 11:21:54 +02:00 committed by GitHub
commit 150d577780
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 77 additions and 39 deletions
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9
include/psa/crypto.h
View File

@ -459,9 +459,12 @@ psa_status_t psa_open_key(psa_key_id_t id,
* maintain the key handle until after the multipart operation has finished.
*
* \param handle The key handle to close.
* If this is \c 0, do nothing and return \c PSA_SUCCESS.
*
* \retval #PSA_SUCCESS
* \p handle was a valid handle or \c 0. It is now closed.
* \retval #PSA_ERROR_INVALID_HANDLE
* \p handle is not a valid handle nor \c 0.
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_CORRUPTION_DETECTED
* \retval #PSA_ERROR_BAD_STATE
@ -579,13 +582,17 @@ psa_status_t psa_copy_key(psa_key_handle_t source_handle,
* key will cause the multipart operation to fail.
*
* \param handle Handle to the key to erase.
* If this is \c 0, do nothing and return \c PSA_SUCCESS.
*
* \retval #PSA_SUCCESS
* The key material has been erased.
* \p handle was a valid handle and the key material that it
* referred to has been erased.
* Alternatively, \p handle is \c 0.
* \retval #PSA_ERROR_NOT_PERMITTED
* The key cannot be erased because it is
* read-only, either due to a policy or due to physical restrictions.
* \retval #PSA_ERROR_INVALID_HANDLE
* \p handle is not a valid handle nor \c 0.
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* There was an failure in communication with the cryptoprocessor.
* The key material may still be present in the cryptoprocessor.

3
library/psa_crypto.c
View File

@ -1013,6 +1013,9 @@ psa_status_t psa_destroy_key( psa_key_handle_t handle )
psa_se_drv_table_entry_t *driver;
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
if( handle == 0 )
return( PSA_SUCCESS );
status = psa_get_key_slot( handle, &slot );
if( status != PSA_SUCCESS )
return( status );

3
library/psa_crypto_slot_management.c
View File

@ -255,6 +255,9 @@ psa_status_t psa_close_key( psa_key_handle_t handle )
psa_status_t status;
psa_key_slot_t *slot;
if( handle == 0 )
return( PSA_SUCCESS );
status = psa_get_key_slot( handle, &slot );
if( status != PSA_SUCCESS )
return( status );

9
tests/suites/test_suite_psa_crypto.data
View File

@ -43,15 +43,6 @@ PSA import/export AES-256
depends_on:MBEDTLS_AES_C
import_export:"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef":PSA_KEY_TYPE_AES:PSA_KEY_USAGE_EXPORT:PSA_ALG_CTR:256:0:PSA_SUCCESS:1
PSA invalid handle (0)
invalid_handle:0
PSA invalid handle (smallest plausible handle)
invalid_handle:1
PSA invalid handle (largest plausible handle)
invalid_handle:-1
PSA import: bad usage flag
import_with_policy:PSA_KEY_TYPE_RAW_DATA:0x40000000:0:PSA_ERROR_INVALID_ARGUMENT

14
tests/suites/test_suite_psa_crypto.function
View File

@ -1103,9 +1103,6 @@ static int test_operations_on_invalid_handle( psa_key_handle_t handle )
buffer, sizeof( buffer ), &length ),
PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_close_key( handle ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_destroy_key( handle ), PSA_ERROR_INVALID_HANDLE );
ok = 1;
exit:
@ -1535,17 +1532,6 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE */
void invalid_handle( int handle )
{
PSA_ASSERT( psa_crypto_init( ) );
test_operations_on_invalid_handle( handle );
exit:
PSA_DONE( );
}
/* END_CASE */
/* BEGIN_CASE */
void import_export_public_key( data_t *data,
int type_arg,

13
tests/suites/test_suite_psa_crypto_slot_management.data
View File

@ -148,8 +148,17 @@ Copy persistent to same
depends_on:MBEDTLS_PSA_CRYPTO_STORAGE_C
copy_to_occupied:PSA_KEY_LIFETIME_PERSISTENT:1:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_COPY:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"404142434445464748494a4b4c4d4e4f":PSA_KEY_LIFETIME_PERSISTENT:1:PSA_KEY_USAGE_EXPORT:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"404142434445464748494a4b4c4d4e4f"
Close/destroy invalid handle
invalid_handle:
invalid handle: 0
invalid_handle:INVALID_HANDLE_0:PSA_SUCCESS:PSA_ERROR_INVALID_HANDLE
invalid handle: never opened
invalid_handle:INVALID_HANDLE_UNOPENED:PSA_ERROR_INVALID_HANDLE:PSA_ERROR_INVALID_HANDLE
invalid handle: already closed
invalid_handle:INVALID_HANDLE_CLOSED:PSA_ERROR_INVALID_HANDLE:PSA_ERROR_INVALID_HANDLE
invalid handle: huge
invalid_handle:INVALID_HANDLE_HUGE:PSA_ERROR_INVALID_HANDLE:PSA_ERROR_INVALID_HANDLE
Open many transient handles
many_transient_handles:42

65
tests/suites/test_suite_psa_crypto_slot_management.function
View File

@ -20,6 +20,14 @@ typedef enum
CLOSE_AFTER,
} reopen_policy_t;
typedef enum
{
INVALID_HANDLE_0,
INVALID_HANDLE_UNOPENED,
INVALID_HANDLE_CLOSED,
INVALID_HANDLE_HUGE,
} invalid_handle_construction_t;
/* All test functions that create persistent keys must call
* `TEST_USES_KEY_ID( key_id )` before creating a persistent key with this
* identifier, and must call psa_purge_key_storage() in their cleanup
@ -625,9 +633,13 @@ exit:
/* END_CASE */
/* BEGIN_CASE */
void invalid_handle( )
void invalid_handle( int handle_construction,
int close_status_arg, int usage_status_arg )
{
psa_key_handle_t handle1 = 0;
psa_key_handle_t valid_handle = 0;
psa_key_handle_t invalid_handle = 0;
psa_status_t close_status = close_status_arg;
psa_status_t usage_status = usage_status_arg;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
uint8_t material[1] = "a";
@ -639,23 +651,50 @@ void invalid_handle( )
psa_set_key_algorithm( &attributes, 0 );
PSA_ASSERT( psa_import_key( &attributes,
material, sizeof( material ),
&handle1 ) );
TEST_ASSERT( handle1 != 0 );
&valid_handle ) );
TEST_ASSERT( valid_handle != 0 );
/* Attempt to close and destroy some invalid handles. */
TEST_EQUAL( psa_close_key( 0 ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_close_key( handle1 - 1 ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_close_key( handle1 + 1 ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_destroy_key( 0 ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_destroy_key( handle1 - 1 ), PSA_ERROR_INVALID_HANDLE );
TEST_EQUAL( psa_destroy_key( handle1 + 1 ), PSA_ERROR_INVALID_HANDLE );
/* Construct an invalid handle as specified in the test case data. */
switch( handle_construction )
{
case INVALID_HANDLE_0:
invalid_handle = 0;
break;
case INVALID_HANDLE_UNOPENED:
/* We can't easily construct a handle that's never been opened
* without knowing how the implementation constructs handle
* values. The current test code assumes that valid handles
* are in a range between 1 and some maximum. */
if( valid_handle == 1 )
invalid_handle = 2;
else
invalid_handle = valid_handle - 1;
break;
case INVALID_HANDLE_CLOSED:
PSA_ASSERT( psa_import_key( &attributes,
material, sizeof( material ),
&invalid_handle ) );
PSA_ASSERT( psa_destroy_key( invalid_handle ) );
break;
case INVALID_HANDLE_HUGE:
invalid_handle = (psa_key_handle_t) ( -1 );
break;
default:
TEST_ASSERT( ! "unknown handle construction" );
}
/* Attempt to use the invalid handle. */
TEST_EQUAL( psa_get_key_attributes( invalid_handle, &attributes ),
usage_status );
TEST_EQUAL( psa_close_key( invalid_handle ), close_status );
TEST_EQUAL( psa_destroy_key( invalid_handle ), close_status );
/* After all this, check that the original handle is intact. */
PSA_ASSERT( psa_get_key_attributes( handle1, &attributes ) );
PSA_ASSERT( psa_get_key_attributes( valid_handle, &attributes ) );
TEST_EQUAL( psa_get_key_type( &attributes ), PSA_KEY_TYPE_RAW_DATA );
TEST_EQUAL( psa_get_key_bits( &attributes ),
PSA_BYTES_TO_BITS( sizeof( material ) ) );
PSA_ASSERT( psa_close_key( handle1 ) );
PSA_ASSERT( psa_close_key( valid_handle ) );
exit:
PSA_DONE( );