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psa: Extend psa_generate_key to support persistent lifetimes

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This commit is contained in:
Darryl Green 2018-11-07 16:05:30 +00:00
parent dd8fb777ce
commit 0c6575a84d
4 changed files with 136 additions and 12 deletions
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41
library/psa_crypto.c
View File

@ -1107,6 +1107,37 @@ psa_status_t psa_export_public_key( psa_key_slot_t key,
data_length, 1 ) );
}
#if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C)
static psa_status_t psa_save_generated_persistent_key( psa_key_slot_t key,
key_slot_t *slot,
size_t bits )
{
psa_status_t status;
uint8_t *data;
size_t key_length;
size_t data_size = PSA_KEY_EXPORT_MAX_SIZE( slot->type, bits );
data = mbedtls_calloc( 1, data_size );
/* Get key data in export format */
status = psa_internal_export_key( slot, data, data_size, &key_length, 0 );
if( status != PSA_SUCCESS )
{
slot->type = PSA_KEY_TYPE_NONE;
goto exit;
}
/* Store in file location */
status = psa_save_persistent_key( key, slot->type, &slot->policy,
data, key_length );
if( status != PSA_SUCCESS )
{
slot->type = PSA_KEY_TYPE_NONE;
}
exit:
mbedtls_zeroize( data, key_length );
mbedtls_free( data );
return( status );
}
#endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */
/****************************************************************/
@ -4309,7 +4340,15 @@ psa_status_t psa_generate_key( psa_key_slot_t key,
return( PSA_ERROR_NOT_SUPPORTED );
slot->type = type;
return( PSA_SUCCESS );
#if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C)
if( slot->lifetime == PSA_KEY_LIFETIME_PERSISTENT )
{
return( psa_save_generated_persistent_key( key, slot, bits ) );
}
#endif /* defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) */
return( status );
}

30
tests/suites/test_suite_psa_crypto.data
View File

@ -1837,4 +1837,32 @@ validate_module_init_key_based:
persistent key can be accessed after in-memory deletion: AES, 128 bits, CTR
depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"2b7e151628aed2a6abf7158809cf4f3c":PSA_KEY_TYPE_AES:128:PSA_KEY_USAGE_EXPORT:PSA_ALG_CTR
persistent_key_load_key_from_storage:"2b7e151628aed2a6abf7158809cf4f3c":PSA_KEY_TYPE_AES:128:PSA_KEY_USAGE_EXPORT:PSA_ALG_CTR:IMPORT_KEY:PSA_SUCCESS
PSA generate persistent key: raw data, 8 bits
depends_on:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_RAW_DATA:8:PSA_KEY_USAGE_EXPORT:0:GENERATE_KEY:PSA_SUCCESS
PSA generate persistent key: AES, 128 bits, CTR
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_AES:128:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT:PSA_ALG_CTR:GENERATE_KEY:PSA_SUCCESS
PSA generate persistent key: DES, 64 bits, CBC-nopad
depends_on:MBEDTLS_DES_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_DES:64:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT:PSA_ALG_CBC_NO_PADDING:GENERATE_KEY:PSA_SUCCESS
PSA generate persistent key: RSA, 1024 bits, good, sign (PSS SHA-256)
depends_on:MBEDTLS_RSA_C:MBEDTLS_GENPRIME:MBEDTLS_PKCS1_V21:MBEDTLS_SHA256_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_RSA_KEYPAIR:1024:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_SIGN | PSA_KEY_USAGE_VERIFY:PSA_ALG_RSA_PSS(PSA_ALG_SHA_256):GENERATE_KEY:PSA_SUCCESS
PSA generate persistent key: ECC, SECP256R1, good
depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECDSA_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_ECC_KEYPAIR(PSA_ECC_CURVE_SECP256R1):256:PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_SIGN | PSA_KEY_USAGE_VERIFY:PSA_ALG_ECDSA_ANY:GENERATE_KEY:PSA_SUCCESS
PSA derive persistent key: HKDF SHA-256
depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b":PSA_KEY_TYPE_RAW_DATA:1024:PSA_KEY_USAGE_EXPORT:0:DERIVE_KEY:PSA_SUCCESS
PSA generate persistent key: AES, 128 bits, CTR
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR:MBEDTLS_PSA_CRYPTO_STORAGE_C
persistent_key_load_key_from_storage:"":PSA_KEY_TYPE_AES:128:PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT:PSA_ALG_CTR:GENERATE_KEY:PSA_ERROR_NOT_PERMITTED

76
tests/suites/test_suite_psa_crypto.function
View File

@ -844,6 +844,13 @@ static psa_key_usage_t usage_to_exercise( psa_key_type_t type,
}
}
typedef enum {
IMPORT_KEY = 0,
GENERATE_KEY = 1,
DERIVE_KEY = 2
} generate_method;
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@ -4034,9 +4041,11 @@ void validate_module_init_key_based( )
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_STORAGE_C */
void persistent_key_load_key_from_storage( data_t *data, int type_arg,
int bits, int usage_arg,
int alg_arg )
int alg_arg, int generation_method,
int export_status )
{
psa_key_slot_t slot = 1;
psa_key_slot_t base_key = 2;
psa_key_type_t type = (psa_key_type_t) type_arg;
psa_key_type_t type_get;
size_t bits_get;
@ -4044,6 +4053,9 @@ void persistent_key_load_key_from_storage( data_t *data, int type_arg,
psa_key_policy_t policy_get;
psa_key_usage_t policy_usage = (psa_key_usage_t) usage_arg;
psa_algorithm_t policy_alg = (psa_algorithm_t) alg_arg;
psa_key_policy_t base_policy_set;
psa_algorithm_t base_policy_alg = PSA_ALG_HKDF(PSA_ALG_SHA_256);
psa_crypto_generator_t generator = PSA_CRYPTO_GENERATOR_INIT;
unsigned char *first_export = NULL;
unsigned char *second_export = NULL;
size_t export_size = PSA_KEY_EXPORT_MAX_SIZE( type, bits );
@ -4064,14 +4076,44 @@ void persistent_key_load_key_from_storage( data_t *data, int type_arg,
policy_alg );
TEST_ASSERT( psa_set_key_policy( slot, &policy_set ) == PSA_SUCCESS );
switch( generation_method )
{
case IMPORT_KEY:
/* Import the key */
TEST_ASSERT( psa_import_key( slot, type,
data->x, data->len ) == PSA_SUCCESS );
break;
/* Import the key */
TEST_ASSERT( psa_import_key( slot, type,
data->x, data->len ) == PSA_SUCCESS );
case GENERATE_KEY:
/* Generate a key */
TEST_ASSERT( psa_generate_key( slot, type, bits,
NULL, 0 ) == PSA_SUCCESS );
break;
case DERIVE_KEY:
/* Create base key */
psa_key_policy_init( &base_policy_set );
psa_key_policy_set_usage( &base_policy_set, PSA_KEY_USAGE_DERIVE,
base_policy_alg );
TEST_ASSERT( psa_set_key_policy(
base_key, &base_policy_set ) == PSA_SUCCESS );
TEST_ASSERT( psa_import_key( base_key, PSA_KEY_TYPE_DERIVE,
data->x, data->len ) == PSA_SUCCESS );
/* Derive a key. */
TEST_ASSERT( psa_key_derivation( &generator, base_key,
base_policy_alg,
NULL, 0, NULL, 0,
export_size ) == PSA_SUCCESS );
TEST_ASSERT( psa_generator_import_key(
slot, PSA_KEY_TYPE_RAW_DATA,
bits, &generator ) == PSA_SUCCESS );
break;
}
/* Export the key */
TEST_ASSERT( psa_export_key( slot, first_export, export_size,
&first_exported_length ) == PSA_SUCCESS );
&first_exported_length ) == export_status );
/* Shutdown and restart */
mbedtls_psa_crypto_free();
@ -4096,13 +4138,27 @@ void persistent_key_load_key_from_storage( data_t *data, int type_arg,
/* Export the key again */
TEST_ASSERT( psa_export_key( slot, second_export, export_size,
&second_exported_length ) == PSA_SUCCESS );
&second_exported_length ) == export_status );
ASSERT_COMPARE( first_export, first_exported_length,
second_export, second_exported_length );
if( export_status == PSA_SUCCESS )
{
ASSERT_COMPARE( first_export, first_exported_length,
second_export, second_exported_length );
ASSERT_COMPARE( data->x, data->len,
first_export, first_exported_length );
switch( generation_method )
{
case IMPORT_KEY:
ASSERT_COMPARE( data->x, data->len,
first_export, first_exported_length );
break;
default:
break;
}
}
/* Do something with the key according to its type and permitted usage. */
if( ! exercise_key( slot, policy_usage, policy_alg ) )
goto exit;
exit:
mbedtls_free( first_export );

1
tests/suites/test_suite_psa_crypto_persistent_key.function
View File

@ -16,6 +16,7 @@ typedef struct {
uint8_t data_len[4];
uint8_t key_data[];
} psa_persistent_key_storage_format;
/* END_HEADER */
/* BEGIN_DEPENDENCIES