mbedtls/tests/suites/test_suite_psa_crypto_persistent_key.function

/* BEGIN_HEADER */

/* The tests in this module verify the contents of key store files. They
 * access internal key storage functions directly. Some of the tests depend
 * on the storage format. On the other hand, these tests treat the storage
 * subsystem as a black box, and in particular have no reliance on the
 * internals of the ITS implementation.
 *
 * Note that if you need to make a change that affects how files are
 * stored, this may indicate that the key store is changing in a
 * backward-incompatible way! Think carefully about backward compatibility
 * before changing how test data is constructed or validated.
 */

#include <stdint.h>

#include "psa_crypto_slot_management.h"
#include "psa_crypto_storage.h"

#include "mbedtls/md.h"

#define PSA_KEY_STORAGE_MAGIC_HEADER "PSA\0KEY"
#define PSA_KEY_STORAGE_MAGIC_HEADER_LENGTH (sizeof(PSA_KEY_STORAGE_MAGIC_HEADER))

/* Enforce the storage format for keys. The storage format is not a public
 * documented interface, but it must be preserved between versions so that
 * upgrades work smoothly, so it's a stable interface nonetheless.
 */
typedef struct {
    uint8_t magic[PSA_KEY_STORAGE_MAGIC_HEADER_LENGTH];
    uint8_t version[4];
    uint8_t lifetime[sizeof(psa_key_lifetime_t)];
    uint8_t type[4];
    uint8_t policy[sizeof(psa_key_policy_t)];
    uint8_t data_len[4];
    uint8_t key_data[];
} psa_persistent_key_storage_format;

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PSA_CRYPTO_C:MBEDTLS_PSA_CRYPTO_STORAGE_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void format_storage_data_check(data_t *key_data,
                               data_t *expected_file_data,
                               int key_lifetime, int key_type, int key_bits,
                               int key_usage, int key_alg, int key_alg2)
{
    uint8_t *file_data = NULL;
    size_t file_data_length =
        key_data->len + sizeof(psa_persistent_key_storage_format);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    psa_set_key_lifetime(&attributes, key_lifetime);
    psa_set_key_type(&attributes, key_type);
    psa_set_key_bits(&attributes, key_bits);
    psa_set_key_usage_flags(&attributes, key_usage);
    psa_set_key_algorithm(&attributes, key_alg);
    psa_set_key_enrollment_algorithm(&attributes, key_alg2);

    TEST_CALLOC(file_data, file_data_length);
    psa_format_key_data_for_storage(key_data->x, key_data->len,
                                    &attributes.core,
                                    file_data);

    TEST_MEMORY_COMPARE(expected_file_data->x, expected_file_data->len,
                   file_data, file_data_length);

exit:
    mbedtls_free(file_data);
}
/* END_CASE */

/* BEGIN_CASE */
void parse_storage_data_check(data_t *file_data,
                              data_t *expected_key_data,
                              int expected_key_lifetime,
                              int expected_key_type,
                              int expected_key_bits,
                              int expected_key_usage,
                              int expected_key_alg,
                              int expected_key_alg2,
                              int expected_status)
{
    uint8_t *key_data = NULL;
    size_t key_data_length = 0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;

    status = psa_parse_key_data_from_storage(file_data->x, file_data->len,
                                             &key_data, &key_data_length,
                                             &attributes.core);

    TEST_EQUAL(status, expected_status);
    if (status != PSA_SUCCESS) {
        goto exit;
    }

    TEST_EQUAL(psa_get_key_lifetime(&attributes),
               (psa_key_type_t) expected_key_lifetime);
    TEST_EQUAL(psa_get_key_type(&attributes),
               (psa_key_type_t) expected_key_type);
    TEST_EQUAL(psa_get_key_bits(&attributes),
               (psa_key_bits_t) expected_key_bits);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes),
               (uint32_t) expected_key_usage);
    TEST_EQUAL(psa_get_key_algorithm(&attributes),
               (uint32_t) expected_key_alg);
    TEST_EQUAL(psa_get_key_enrollment_algorithm(&attributes),
               (uint32_t) expected_key_alg2);
    TEST_MEMORY_COMPARE(expected_key_data->x, expected_key_data->len,
                   key_data, key_data_length);

exit:
    mbedtls_free(key_data);
}
/* END_CASE */

/* BEGIN_CASE */
void save_large_persistent_key(int data_length_arg, int expected_status)
{
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(1, 42);
    uint8_t *data = NULL;
    size_t data_length = data_length_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_CALLOC(data, data_length);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_id(&attributes, key_id);
    psa_set_key_type(&attributes, PSA_KEY_TYPE_RAW_DATA);

    TEST_EQUAL(psa_import_key(&attributes, data, data_length, &key_id),
               expected_status);

    if (expected_status == PSA_SUCCESS) {
        PSA_ASSERT(psa_destroy_key(key_id));
    }

exit:
    mbedtls_free(data);
    PSA_DONE();
    psa_destroy_persistent_key(key_id);
}
/* END_CASE */

/* BEGIN_CASE */
void persistent_key_destroy(int owner_id_arg, int key_id_arg, int restart,
                            int first_type_arg, data_t *first_data,
                            int second_type_arg, data_t *second_data)
{
    mbedtls_svc_key_id_t key_id =
        mbedtls_svc_key_id_make(owner_id_arg, key_id_arg);
    mbedtls_svc_key_id_t returned_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t first_type = (psa_key_type_t) first_type_arg;
    psa_key_type_t second_type = (psa_key_type_t) second_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_id(&attributes, key_id);
    psa_set_key_type(&attributes, first_type);

    PSA_ASSERT(psa_import_key(&attributes, first_data->x, first_data->len,
                              &returned_key_id));

    if (restart) {
        psa_close_key(key_id);
        PSA_DONE();
        PSA_ASSERT(psa_crypto_init());
    }
    TEST_EQUAL(psa_is_key_present_in_storage(key_id), 1);

    /* Destroy the key */
    PSA_ASSERT(psa_destroy_key(key_id));

    /* Check key slot storage is removed */
    TEST_EQUAL(psa_is_key_present_in_storage(key_id), 0);

    /* Shutdown and restart */
    PSA_DONE();
    PSA_ASSERT(psa_crypto_init());

    /* Create another key in the same slot */
    psa_set_key_id(&attributes, key_id);
    psa_set_key_type(&attributes, second_type);
    PSA_ASSERT(psa_import_key(&attributes, second_data->x, second_data->len,
                              &returned_key_id));

    PSA_ASSERT(psa_destroy_key(key_id));

exit:
    PSA_DONE();
    psa_destroy_persistent_key(key_id);
}
/* END_CASE */

/* BEGIN_CASE */
void persistent_key_import(int owner_id_arg, int key_id_arg, int type_arg,
                           data_t *data, int restart, int expected_status)
{
    mbedtls_svc_key_id_t key_id =
        mbedtls_svc_key_id_make(owner_id_arg, key_id_arg);
    mbedtls_svc_key_id_t returned_key_id;
    psa_key_type_t type = (psa_key_type_t) type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_id(&attributes, key_id);
    psa_set_key_type(&attributes, type);
    TEST_EQUAL(psa_import_key(&attributes, data->x, data->len, &returned_key_id),
               expected_status);

    if (expected_status != PSA_SUCCESS) {
        TEST_ASSERT(mbedtls_svc_key_id_is_null(returned_key_id));
        TEST_EQUAL(psa_is_key_present_in_storage(key_id), 0);
        goto exit;
    }

    TEST_ASSERT(mbedtls_svc_key_id_equal(returned_key_id, key_id));

    if (restart) {
        PSA_ASSERT(psa_purge_key(key_id));
        PSA_DONE();
        PSA_ASSERT(psa_crypto_init());
    }

    psa_reset_key_attributes(&attributes);
    PSA_ASSERT(psa_get_key_attributes(key_id, &attributes));
    TEST_ASSERT(mbedtls_svc_key_id_equal(psa_get_key_id(&attributes),
                                         key_id));
    TEST_EQUAL(psa_get_key_lifetime(&attributes),
               PSA_KEY_LIFETIME_PERSISTENT);
    TEST_EQUAL(psa_get_key_type(&attributes), type);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), 0);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), 0);

    PSA_ASSERT(psa_destroy_key(key_id));

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    psa_destroy_persistent_key(key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void import_export_persistent_key(data_t *data, int type_arg,
                                  int expected_bits,
                                  int restart, int key_not_exist)
{
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(1, 42);
    psa_key_type_t type = (psa_key_type_t) type_arg;
    mbedtls_svc_key_id_t returned_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    unsigned char *exported = NULL;
    size_t export_size = data->len;
    size_t exported_length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_CALLOC(exported, export_size);

    PSA_ASSERT(psa_crypto_init());

    psa_set_key_id(&attributes, key_id);
    psa_set_key_type(&attributes, type);
    psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_EXPORT);

    /* Import the key */
    PSA_ASSERT(psa_import_key(&attributes, data->x, data->len,
                              &returned_key_id));


    if (restart) {
        PSA_ASSERT(psa_purge_key(key_id));
        PSA_DONE();
        PSA_ASSERT(psa_crypto_init());
    }

    /* Test the key information */
    psa_reset_key_attributes(&attributes);
    PSA_ASSERT(psa_get_key_attributes(key_id, &attributes));
    TEST_ASSERT(mbedtls_svc_key_id_equal(
                    psa_get_key_id(&attributes), key_id));
    TEST_EQUAL(psa_get_key_lifetime(&attributes),
               PSA_KEY_LIFETIME_PERSISTENT);
    TEST_EQUAL(psa_get_key_type(&attributes), type);
    TEST_EQUAL(psa_get_key_bits(&attributes), (size_t) expected_bits);
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), PSA_KEY_USAGE_EXPORT);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), 0);

    TEST_EQUAL(psa_is_key_present_in_storage(key_id), 1);

    if (key_not_exist) {
        psa_destroy_persistent_key(key_id);
    }
    /* Export the key */
    PSA_ASSERT(psa_export_key(key_id, exported, export_size,
                              &exported_length));

    TEST_MEMORY_COMPARE(data->x, data->len, exported, exported_length);

    /* Destroy the key */
    PSA_ASSERT(psa_destroy_key(key_id));
    TEST_EQUAL(psa_is_key_present_in_storage(key_id), 0);

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes(&attributes);

    mbedtls_free(exported);
    PSA_DONE();
    psa_destroy_persistent_key(key_id);
}
/* END_CASE */

/* BEGIN_CASE */
void destroy_nonexistent(int id_arg, int expected_status_arg)
{
    mbedtls_svc_key_id_t id = mbedtls_svc_key_id_make(1, id_arg);
    psa_status_t expected_status = expected_status_arg;

    PSA_INIT();

    TEST_EQUAL(expected_status, psa_destroy_key(id));

exit:
    PSA_DONE();
}
/* END_CASE */