/* BEGIN_HEADER */
#include <stdint.h>
#include "psa/crypto.h"
#include "psa_crypto_storage_backend.h"

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PSA_CRYPTO_C:MBEDTLS_PSA_CRYPTO_STORAGE_FILE_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void load_data_from_file( int slot_to_load, data_t *data, int should_make_file,
                          int capacity_arg, int expected_status )
{
    char slot_location[] = "psa_key_slot_1";
    psa_status_t status;
    int ret;
    size_t file_size = 0;
    uint8_t *loaded_data = NULL;
    size_t capacity = (size_t) capacity_arg;

    if( should_make_file == 1 )
    {
        /* Create a file with data contents, with mask permissions. */
        FILE *file;
        file = fopen( slot_location, "wb+" );
        TEST_ASSERT( file != NULL );
        file_size = fwrite( data->x, 1, data->len, file );
        TEST_ASSERT( file_size == data->len );
        ret = fclose( file );
        TEST_ASSERT( ret == 0 );
    }

    /* Read from the file with psa_crypto_storage_load. */
    loaded_data = mbedtls_calloc( 1, capacity );
    TEST_ASSERT( loaded_data != NULL );
    status = psa_crypto_storage_load( (psa_key_slot_t) slot_to_load, loaded_data,
                                   file_size );

    /* Check we get the expected status. */
    TEST_ASSERT( status == expected_status );
    if( status != PSA_SUCCESS )
        goto exit;

    /* Check that the file data and data length is what we expect. */
    ASSERT_COMPARE( data->x, data->len, loaded_data, file_size );

exit:
    mbedtls_free( loaded_data );
    remove( slot_location );
}
/* END_CASE */

/* BEGIN_CASE */
void write_data_to_file( data_t *data, int expected_status )
{
    char slot_location[] = "psa_key_slot_1";
    psa_status_t status;
    int ret;
    FILE *file;
    size_t file_size;
    size_t num_read;
    uint8_t *loaded_data = NULL;

    /* Write data to file. */
    status = psa_crypto_storage_store( 1, data->x, data->len );

    /* Check that we got the expected status. */
    TEST_ASSERT( status == expected_status );
    if( status != PSA_SUCCESS )
        goto exit;

    /* Check that the file length is what we expect */
    file = fopen( slot_location, "rb" );
    TEST_ASSERT( file != NULL );
    fseek( file, 0, SEEK_END );
    file_size = (size_t) ftell( file );
    fseek( file, 0, SEEK_SET );
    TEST_ASSERT( file_size == data->len );

    /* Check that the file contents are what we expect */
    loaded_data = mbedtls_calloc( 1, data->len );
    TEST_ASSERT( loaded_data != NULL );

    num_read = fread( loaded_data, 1, file_size, file );
    TEST_ASSERT( num_read == file_size );
    ASSERT_COMPARE( data->x, data->len, loaded_data, file_size );
    ret = fclose( file );
    TEST_ASSERT( ret == 0 );

exit:
    mbedtls_free( loaded_data );
    remove( slot_location );
}
/* END_CASE */


/* BEGIN_CASE */
void get_file_size( data_t *data, int expected_data_length,
                    int expected_status, int should_make_file )
{
    char slot_location[] = "psa_key_slot_1";
    psa_status_t status;
    int ret;
    size_t file_size;

    if( should_make_file )
    {
        /* Create a file with data contents, with mask permissions. */
        FILE *file;
        file = fopen( slot_location, "wb+" );
        TEST_ASSERT( file != NULL );
        file_size = fwrite( data->x, 1, data->len, file );
        TEST_ASSERT( file_size == data->len );
        ret = fclose( file );
        TEST_ASSERT( ret == 0 );
    }

    /* Check get data size is what we expect */
    status = psa_crypto_storage_get_data_length( 1, &file_size );
    TEST_ASSERT( status == expected_status );
    if( expected_status == PSA_SUCCESS )
        TEST_ASSERT( file_size == (size_t)expected_data_length );

exit:
    remove( slot_location );
}
/* END_CASE */

/* BEGIN_CASE */
void write_data_to_prexisting_file( char *preexist_file_location,
                                    data_t *data, int expected_status )
{
    char slot_location[] = "psa_key_slot_1";
    psa_status_t status;
    int ret;
    FILE *file;

    /* Create file first */
    file = fopen( preexist_file_location, "wb" );
    TEST_ASSERT( file != NULL );
    ret = fclose( file );
    TEST_ASSERT( ret == 0 );

    /* Write data to file. */
    status = psa_crypto_storage_store( 1, data->x, data->len );

    /* Check that we got the expected status. */
    TEST_ASSERT( status == expected_status );
    if( status != PSA_SUCCESS )
        goto exit;

exit:
    remove( preexist_file_location );
    remove( slot_location );
}
/* END_CASE */