1 /* 2 * Basic progam to add ext4 encryption to a file system 3 * 4 * Copyright 2015, Google, Inc. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Public 8 * License. 9 * %End-Header% 10 */ 11 12 #include <stdio.h> 13 #include <string.h> 14 #include <unistd.h> 15 #include <stdlib.h> 16 #include <time.h> 17 #include <sys/types.h> 18 #include <sys/time.h> 19 20 #include <ext2fs/ext2_fs.h> 21 #include <ext2fs/ext2fs.h> 22 23 int main (int argc, char *argv[]) 24 { 25 errcode_t retval = 0; 26 ext2_filsys fs; 27 28 setbuf(stdout, NULL); 29 setbuf(stderr, NULL); 30 initialize_ext2_error_table(); 31 32 if (argc != 2) { 33 fprintf(stderr, "%s: Usage <device|filesystem>\n", argv[0]); 34 exit(1); 35 } 36 37 retval = ext2fs_open(argv[1], EXT2_FLAG_RW, 0, 0, 38 unix_io_manager, &fs); 39 40 if (retval) { 41 com_err(argv[0], retval, "while trying to open '%s'", 42 argv[1]); 43 exit(1); 44 } 45 if (!ext2fs_has_feature_encrypt(fs->super)) { 46 ext2fs_set_feature_encrypt(fs->super); 47 fs->super->s_encrypt_algos[0] = 48 EXT4_ENCRYPTION_MODE_AES_256_XTS; 49 fs->super->s_encrypt_algos[1] = 50 EXT4_ENCRYPTION_MODE_AES_256_CTS; 51 ext2fs_mark_super_dirty(fs); 52 printf("Ext4 encryption enabled on %s\n", argv[1]); 53 } else 54 printf("Ext4 encryption already enabled on %s\n", argv[1]); 55 56 retval = ext2fs_close(fs); 57 if (retval) { 58 com_err(argv[0], retval, "while trying to close '%s'", 59 argv[1]); 60 exit(1); 61 } 62 return (0); 63 } 64 65
