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/*
* Basic program to add ext4 encryption to a file system
*
* Copyright 2015, Google, Inc.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include <ext2fs/ext2_fs.h>
#include <ext2fs/ext2fs.h>
int main (int argc, char *argv[])
{
errcode_t retval = 0;
ext2_filsys fs;
setbuf(stdout, NULL);
setbuf(stderr, NULL);
initialize_ext2_error_table();
if (argc != 2) {
fprintf(stderr, "%s: Usage <device|filesystem>\n", argv[0]);
exit(1);
}
retval = ext2fs_open(argv[1], EXT2_FLAG_RW, 0, 0,
unix_io_manager, &fs);
if (retval) {
com_err(argv[0], retval, "while trying to open '%s'",
argv[1]);
exit(1);
}
if (!ext2fs_has_feature_encrypt(fs->super)) {
ext2fs_set_feature_encrypt(fs->super);
fs->super->s_encrypt_algos[0] =
EXT4_ENCRYPTION_MODE_AES_256_XTS;
fs->super->s_encrypt_algos[1] =
EXT4_ENCRYPTION_MODE_AES_256_CTS;
ext2fs_mark_super_dirty(fs);
printf("Ext4 encryption enabled on %s\n", argv[1]);
} else
printf("Ext4 encryption already enabled on %s\n", argv[1]);
retval = ext2fs_close(fs);
if (retval) {
com_err(argv[0], retval, "while trying to close '%s'",
argv[1]);
exit(1);
}
return (0);
}
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