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