/* BEGIN_HEADER */

/* This test file is specific to the ITS implementation in PSA Crypto
 * on top of stdio. It expects to know what the stdio name of a file is
 * based on its keystore name.
 *
 * 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 "../library/psa_crypto_its.h"

#include "test/psa_helpers.h"

/* Internal definitions of the implementation, copied for the sake of
 * some of the tests and of the cleanup code. */
#define PSA_ITS_STORAGE_PREFIX ""
#define PSA_ITS_STORAGE_FILENAME_PATTERN "%08lx%08lx"
#define PSA_ITS_STORAGE_SUFFIX ".psa_its"
#define PSA_ITS_STORAGE_FILENAME_LENGTH         \
    (sizeof(PSA_ITS_STORAGE_PREFIX) - 1 +    /*prefix without terminating 0*/ \
     16 +  /*UID (64-bit number in hex)*/                               \
     16 +  /*UID (64-bit number in hex)*/                               \
     sizeof(PSA_ITS_STORAGE_SUFFIX) - 1 +    /*suffix without terminating 0*/ \
     1 /*terminating null byte*/)
#define PSA_ITS_STORAGE_TEMP \
    PSA_ITS_STORAGE_PREFIX "tempfile" PSA_ITS_STORAGE_SUFFIX
static void psa_its_fill_filename(psa_storage_uid_t uid, char *filename)
{
    /* Break up the UID into two 32-bit pieces so as not to rely on
     * long long support in snprintf. */
    mbedtls_snprintf(filename, PSA_ITS_STORAGE_FILENAME_LENGTH,
                     "%s" PSA_ITS_STORAGE_FILENAME_PATTERN "%s",
                     PSA_ITS_STORAGE_PREFIX,
                     (unsigned long) (uid >> 32),
                     (unsigned long) (uid & 0xffffffff),
                     PSA_ITS_STORAGE_SUFFIX);
}

/* Maximum uid used by the test, recorded so that cleanup() can delete
 * all files. 0xffffffffffffffff is always cleaned up, so it does not
 * need to and should not be taken into account for uid_max. */
static psa_storage_uid_t uid_max = 0;

static void cleanup(void)
{
    /* Call remove() on all the files that a test might have created.
     * We ignore the error if the file exists but remove() fails because
     * it can't be checked portably (except by attempting to open the file
     * first, which is needlessly slow and complicated here). A failure of
     * remove() on an existing file is very unlikely anyway and would not
     * have significant consequences other than perhaps failing the next
     * test case. */
    char filename[PSA_ITS_STORAGE_FILENAME_LENGTH];
    psa_storage_uid_t uid;
    for (uid = 0; uid < uid_max; uid++) {
        psa_its_fill_filename(uid, filename);
        (void) remove(filename);
    }
    psa_its_fill_filename((psa_storage_uid_t) (-1), filename);
    (void) remove(filename);
    (void) remove(PSA_ITS_STORAGE_TEMP);
    uid_max = 0;
}

static psa_status_t psa_its_set_wrap(psa_storage_uid_t uid,
                                     uint32_t data_length,
                                     const void *p_data,
                                     psa_storage_create_flags_t create_flags)
{
    if (uid_max != (psa_storage_uid_t) (-1) && uid_max < uid) {
        uid_max = uid;
    }
    return psa_its_set(uid, data_length, p_data, create_flags);
}

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PSA_ITS_FILE_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void set_get_remove(int uid_arg, int flags_arg, data_t *data)
{
    psa_storage_uid_t uid = uid_arg;
    uint32_t flags = flags_arg;
    struct psa_storage_info_t info;
    unsigned char *buffer = NULL;
    size_t ret_len = 0;

    ASSERT_ALLOC(buffer, data->len);

    PSA_ASSERT(psa_its_set_wrap(uid, data->len, data->x, flags));

    PSA_ASSERT(psa_its_get_info(uid, &info));
    TEST_ASSERT(info.size == data->len);
    TEST_ASSERT(info.flags == flags);
    PSA_ASSERT(psa_its_get(uid, 0, data->len, buffer, &ret_len));
    ASSERT_COMPARE(data->x, data->len, buffer, ret_len);

    PSA_ASSERT(psa_its_remove(uid));

exit:
    mbedtls_free(buffer);
    cleanup();
}
/* END_CASE */

/* BEGIN_CASE */
void set_overwrite(int uid_arg,
                   int flags1_arg, data_t *data1,
                   int flags2_arg, data_t *data2)
{
    psa_storage_uid_t uid = uid_arg;
    uint32_t flags1 = flags1_arg;
    uint32_t flags2 = flags2_arg;
    struct psa_storage_info_t info;
    unsigned char *buffer = NULL;
    size_t ret_len = 0;

    ASSERT_ALLOC(buffer, MAX(data1->len, data2->len));

    PSA_ASSERT(psa_its_set_wrap(uid, data1->len, data1->x, flags1));
    PSA_ASSERT(psa_its_get_info(uid, &info));
    TEST_ASSERT(info.size == data1->len);
    TEST_ASSERT(info.flags == flags1);
    PSA_ASSERT(psa_its_get(uid, 0, data1->len, buffer, &ret_len));
    ASSERT_COMPARE(data1->x, data1->len, buffer, ret_len);

    PSA_ASSERT(psa_its_set_wrap(uid, data2->len, data2->x, flags2));
    PSA_ASSERT(psa_its_get_info(uid, &info));
    TEST_ASSERT(info.size == data2->len);
    TEST_ASSERT(info.flags == flags2);
    ret_len = 0;
    PSA_ASSERT(psa_its_get(uid, 0, data2->len, buffer, &ret_len));
    ASSERT_COMPARE(data2->x, data2->len, buffer, ret_len);

    PSA_ASSERT(psa_its_remove(uid));

exit:
    mbedtls_free(buffer);
    cleanup();
}
/* END_CASE */

/* BEGIN_CASE */
void set_multiple(int first_id, int count)
{
    psa_storage_uid_t uid0 = first_id;
    psa_storage_uid_t uid;
    char stored[40];
    char retrieved[40];
    size_t ret_len = 0;

    memset(stored, '.', sizeof(stored));
    for (uid = uid0; uid < uid0 + count; uid++) {
        mbedtls_snprintf(stored, sizeof(stored),
                         "Content of file 0x%08lx", (unsigned long) uid);
        PSA_ASSERT(psa_its_set_wrap(uid, sizeof(stored), stored, 0));
    }

    for (uid = uid0; uid < uid0 + count; uid++) {
        mbedtls_snprintf(stored, sizeof(stored),
                         "Content of file 0x%08lx", (unsigned long) uid);
        PSA_ASSERT(psa_its_get(uid, 0, sizeof(stored), retrieved, &ret_len));
        ASSERT_COMPARE(retrieved, ret_len,
                       stored, sizeof(stored));
        PSA_ASSERT(psa_its_remove(uid));
        TEST_ASSERT(psa_its_get(uid, 0, 0, NULL, NULL) ==
                    PSA_ERROR_DOES_NOT_EXIST);
    }

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

/* BEGIN_CASE */
void nonexistent(int uid_arg, int create_and_remove)
{
    psa_storage_uid_t uid = uid_arg;
    struct psa_storage_info_t info;

    if (create_and_remove) {
        PSA_ASSERT(psa_its_set_wrap(uid, 0, NULL, 0));
        PSA_ASSERT(psa_its_remove(uid));
    }

    TEST_ASSERT(psa_its_remove(uid) == PSA_ERROR_DOES_NOT_EXIST);
    TEST_ASSERT(psa_its_get_info(uid, &info) ==
                PSA_ERROR_DOES_NOT_EXIST);
    TEST_ASSERT(psa_its_get(uid, 0, 0, NULL, NULL) ==
                PSA_ERROR_DOES_NOT_EXIST);

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

/* BEGIN_CASE */
void get_at(int uid_arg, data_t *data,
            int offset, int length_arg,
            int expected_status)
{
    psa_storage_uid_t uid = uid_arg;
    unsigned char *buffer = NULL;
    psa_status_t status;
    size_t length = length_arg >= 0 ? length_arg : 0;
    unsigned char *trailer;
    size_t i;
    size_t ret_len = 0;

    ASSERT_ALLOC(buffer, length + 16);
    trailer = buffer + length;
    memset(trailer, '-', 16);

    PSA_ASSERT(psa_its_set_wrap(uid, data->len, data->x, 0));

    status = psa_its_get(uid, offset, length_arg, buffer, &ret_len);
    TEST_ASSERT(status == (psa_status_t) expected_status);
    if (status == PSA_SUCCESS) {
        ASSERT_COMPARE(data->x + offset, (size_t) length_arg,
                       buffer, ret_len);
    }
    for (i = 0; i < 16; i++) {
        TEST_ASSERT(trailer[i] == '-');
    }
    PSA_ASSERT(psa_its_remove(uid));

exit:
    mbedtls_free(buffer);
    cleanup();
}
/* END_CASE */

/* BEGIN_CASE */
void get_fail(int uid_arg, data_t *data,
              int overwrite_magic, int cut_header,
              int expected_status)
{
    psa_storage_uid_t uid = uid_arg;
    unsigned char *buffer = NULL;
    psa_status_t status;
    size_t n;
    size_t ret_len = 0;
    char filename[PSA_ITS_STORAGE_FILENAME_LENGTH];
    FILE *stream = NULL;
    char bad_char = 'X';

    PSA_ASSERT(psa_its_set_wrap(uid, data->len, data->x, 0));

    psa_its_fill_filename(uid, filename);
    stream = fopen(filename, "rb+");
    TEST_ASSERT(NULL != stream);
    if (0 != overwrite_magic) {
        /* Overwrite the 1st byte of the file, the ITS magic number */
        TEST_ASSERT(fseek(stream, 0, SEEK_SET) == 0);
        n = fwrite(&bad_char, 1, 1, stream);
        TEST_ASSERT(1 == n);
    }
    if (0 != cut_header) {
        /* Reopen file and truncate it to 0 byte by specifying the 'w' flag */
        stream = freopen(filename, "wb", stream);
        TEST_ASSERT(NULL != stream);
    }
    fclose(stream);
    stream = NULL;

    status = psa_its_get(uid, 0, 0, buffer, &ret_len);
    TEST_ASSERT(status == (psa_status_t) expected_status);
    TEST_ASSERT(0 == ret_len);
    PSA_ASSERT(psa_its_remove(uid));

    /* Check if the file is really deleted. */
    stream = fopen(filename, "rb");
    TEST_ASSERT(NULL == stream);

exit:
    if (stream != NULL) {
        fclose(stream);
    }

    mbedtls_free(buffer);
    cleanup();
}
/* END_CASE */

/* BEGIN_CASE */
void set_fail(int uid_arg, data_t *data,
              int expected_status)
{
    psa_storage_uid_t uid = uid_arg;
    TEST_ASSERT(psa_its_set_wrap(uid, data->len, data->x, 0) ==
                (psa_status_t) expected_status);

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