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/* vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80: */
/*
* Copyright (c) 2016 Red Hat, Inc.
* Author: Nathaniel McCallum <npmccallum@redhat.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <error.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "test.h"
char filename[] = "/tmp/luksmetaXXXXXX";
static size_t
first_nonzero(FILE *file, size_t start, size_t length)
{
uint8_t *buffer;
buffer = malloc(length);
if (!buffer)
return false;
if (fseek(file, start, SEEK_SET) != 0) {
free(buffer);
return false;
}
if (fread(buffer, length, 1, file) != 1) {
free(buffer);
return false;
}
for (size_t i = 0; i < length; i++) {
if (buffer[i] != 0) {
free(buffer);
return i;
}
}
free(buffer);
return length;
}
bool
test_layout(range_t *ranges)
{
bool valid = false;
FILE *file = NULL;
file = fopen(filename, "r");
if (!file)
return false;
for (size_t i = 0; ranges[i].length != 0; i++) {
size_t nonzero;
fprintf(stderr, "%08zu:%08zu (%c= 0)\n",
ranges[i].start, ranges[i].start + ranges[i].length,
ranges[i].zero ? '=' : '!');
nonzero = first_nonzero(file, ranges[i].start, ranges[i].length);
if (ranges[i].zero && nonzero < ranges[i].length) {
fprintf(stderr, "unexpected nonzero: %zu\n", nonzero);
goto egress;
} else if (!ranges[i].zero && nonzero == ranges[i].length) {
fprintf(stderr, "unexpected zero: %zu-%zu\n",
ranges[i].start, ranges[i].start + ranges[i].length);
goto egress;
}
}
valid = true;
egress:
fclose(file);
return valid;
}
void
test_hole(struct crypt_device *cd, uint32_t *offset, uint32_t *length)
{
uint64_t payload_offset = 0;
uint64_t keyarea_end = 0;
int r = 0;
payload_offset = crypt_get_data_offset(cd) * 512;
if (payload_offset < ALIGN(1, true))
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
for (int slot = 0; slot < crypt_keyslot_max(CRYPT_LUKS1); slot++) {
uint64_t off = 0;
uint64_t len = 0;
r = crypt_keyslot_area(cd, slot, &off, &len);
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
if (off + len > keyarea_end)
keyarea_end = off + len;
}
*offset = ALIGN(keyarea_end, true);
*length = ALIGN(payload_offset, false) - *offset;
}
struct crypt_device *
test_format(void)
{
struct crypt_device *cd = NULL;
int fd;
int r;
fd = mkstemp(filename);
if (fd < 0)
error(EXIT_FAILURE, errno, "%s:%d", __FILE__, __LINE__);
/* Create a 4MB sparse file. */
if (lseek(fd, 4194303, SEEK_SET) == -1)
error(EXIT_FAILURE, errno, "%s:%d", __FILE__, __LINE__);
if (write(fd, "", 1) != 1)
error(EXIT_FAILURE, errno, "%s:%d", __FILE__, __LINE__);
close(fd);
r = crypt_init(&cd, filename);
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
r = crypt_format(cd, CRYPT_LUKS1, "aes", "xts-plain64",
NULL, NULL, 32, NULL);
if (r == -5) {
fprintf(stderr, "crypt_format failed, assuming AF_ALG,SOCK_SEQPACKET failure\n");
exit(77);
}
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
return cd;
}
struct crypt_device *
test_init(void)
{
struct crypt_device *cd = NULL;
int r;
r = crypt_init(&cd, filename);
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
r = crypt_load(cd, CRYPT_LUKS1, NULL);
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
r = luksmeta_init(cd);
if (r < 0)
error(EXIT_FAILURE, -r, "%s:%d", __FILE__, __LINE__);
return cd;
}
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