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#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include "cmds.h"
#include "libbcachefs/checksum.h"
#include "crypto.h"
#include "libbcachefs.h"
#include "tools-util.h"
static void unlock_usage(void)
{
puts("bcachefs unlock - unlock an encrypted filesystem so it can be mounted\n"
"Usage: bcachefs unlock [OPTION] device\n"
"\n"
"Options:\n"
" -c, --check Check if a device is encrypted\n"
" -k, --keyring (session|user|user_session)\n"
" Keyring to add to (default: user)\n"
" -f, --file Passphrase file to read from (disables passphrase prompt)\n"
" -h, --help Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_unlock(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "check", no_argument, NULL, 'c' },
{ "keyring", required_argument, NULL, 'k' },
{ "file", required_argument, NULL, 'f' },
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
const char *keyring = "user";
bool check = false;
const char *passphrase_file_path = NULL;
char *passphrase = NULL;
int opt;
while ((opt = getopt_long(argc, argv, "cf:k:h", longopts, NULL)) != -1)
switch (opt) {
case 'c':
check = true;
break;
case 'k':
keyring = strdup(optarg);
break;
case 'f':
passphrase_file_path = strdup(optarg);
break;
case 'h':
unlock_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
char *dev = arg_pop();
if (!dev) {
unlock_usage();
die("Please supply a device");
}
if (argc)
die("Too many arguments");
struct bch_opts opts = bch2_opts_empty();
opt_set(opts, noexcl, true);
opt_set(opts, nochanges, true);
struct bch_sb_handle sb;
int ret = bch2_read_super(dev, &opts, &sb);
if (ret)
die("Error opening %s: %s", dev, bch2_err_str(ret));
if (!bch2_sb_is_encrypted(sb.sb))
die("%s is not encrypted", dev);
if (check)
exit(EXIT_SUCCESS);
if (passphrase_file_path){
passphrase = read_file_str(AT_FDCWD, passphrase_file_path);
} else {
passphrase = read_passphrase("Enter passphrase: ");
}
bch2_add_key(sb.sb, "user", keyring, passphrase);
bch2_free_super(&sb);
memzero_explicit(passphrase, strlen(passphrase));
free(passphrase);
return 0;
}
static void set_passphrase_usage(void)
{
puts("bcachefs set-passphares - change passphrase on an encrypted filesystem\n"
"Usage: bcachefs set-passphares device\n"
"\n"
"Options:\n"
" -h, --help Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_set_passphrase(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
int opt;
while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1)
switch (opt) {
case 'h':
set_passphrase_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
if (!argc) {
set_passphrase_usage();
die("Please supply one or more devices");
}
darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
struct bch_opts opts = bch2_opts_empty();
opt_set(opts, nostart, true);
/*
* we use bch2_fs_open() here, instead of just reading the superblock,
* to make sure we're opening and updating every component device:
*/
struct bch_fs *c = bch2_fs_open(&devs, &opts);
if (IS_ERR(c))
die("Error opening %s: %s", argv[1], bch2_err_str(PTR_ERR(c)));
struct bch_sb *sb = c->disk_sb.sb;
struct bch_sb_field_crypt *crypt = bch2_sb_field_get(sb, crypt);
if (!crypt)
die("Filesystem does not have encryption enabled");
struct bch_key key;
int ret = bch2_decrypt_sb_key(c, crypt, &key);
if (ret)
die("Error getting current key");
char *new_passphrase = read_passphrase_twice("Enter new passphrase: ");
bch_crypt_update_passphrase(sb, crypt, &key, new_passphrase);
bch2_revoke_key(c->disk_sb.sb);
bch2_write_super(c);
bch2_fs_stop(c);
return 0;
}
static void remove_passphrase_usage(void)
{
puts("bcachefs remove-passphares - remove passphrase on an encrypted filesystem\n"
"Usage: bcachefs remove-passphares device\n"
"\n"
"Options:\n"
" -h, --help Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_remove_passphrase(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
int opt;
while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1)
switch (opt) {
case 'h':
set_passphrase_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
if (!argc) {
set_passphrase_usage();
die("Please supply one or more devices");
}
darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
struct bch_opts opts = bch2_opts_empty();
opt_set(opts, nostart, true);
struct bch_fs *c = bch2_fs_open(&devs, &opts);
if (IS_ERR(c))
die("Error opening %s: %s", argv[1], bch2_err_str(PTR_ERR(c)));
struct bch_sb *sb = c->disk_sb.sb;
struct bch_sb_field_crypt *crypt = bch2_sb_field_get(sb, crypt);
if (!crypt)
die("Filesystem does not have encryption enabled");
struct bch_key key;
int ret = bch2_decrypt_sb_key(c, crypt, &key);
if (ret)
die("Error getting current key");
bch_crypt_update_passphrase(sb, crypt, &key, NULL);
bch2_write_super(c);
bch2_fs_stop(c);
return 0;
}
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