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fish: move disk decryption helpers in own file
This way it is easier to use them outside the rest of the code in guestfish for inspection & mount. Just code motion, no behaviour changes.
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Original file line number | Diff line number | Diff line change |
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/* libguestfs - shared disk decryption | ||
* Copyright (C) 2010 Red Hat Inc. | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 2 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 General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
*/ | ||
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/** | ||
* This file implements the decryption of disk images, usually done | ||
* before mounting their partitions. | ||
*/ | ||
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#include <config.h> | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
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#include "c-ctype.h" | ||
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#include "guestfs.h" | ||
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#include "options.h" | ||
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/** | ||
* Make a LUKS map name from the partition name, | ||
* eg. C<"/dev/vda2" =E<gt> "luksvda2"> | ||
*/ | ||
static void | ||
make_mapname (const char *device, char *mapname, size_t len) | ||
{ | ||
size_t i = 0; | ||
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if (len < 5) | ||
abort (); | ||
strcpy (mapname, "luks"); | ||
mapname += 4; | ||
len -= 4; | ||
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if (STRPREFIX (device, "/dev/")) | ||
i = 5; | ||
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for (; device[i] != '\0' && len >= 1; ++i) { | ||
if (c_isalnum (device[i])) { | ||
*mapname++ = device[i]; | ||
len--; | ||
} | ||
} | ||
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*mapname = '\0'; | ||
} | ||
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/** | ||
* Simple implementation of decryption: look for any C<crypto_LUKS> | ||
* partitions and decrypt them, then rescan for VGs. This only works | ||
* for Fedora whole-disk encryption. WIP to make this work for other | ||
* encryption schemes. | ||
*/ | ||
void | ||
inspect_do_decrypt (guestfs_h *g) | ||
{ | ||
CLEANUP_FREE_STRING_LIST char **partitions = guestfs_list_partitions (g); | ||
if (partitions == NULL) | ||
exit (EXIT_FAILURE); | ||
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int need_rescan = 0; | ||
size_t i; | ||
for (i = 0; partitions[i] != NULL; ++i) { | ||
CLEANUP_FREE char *type = guestfs_vfs_type (g, partitions[i]); | ||
if (type && STREQ (type, "crypto_LUKS")) { | ||
char mapname[32]; | ||
make_mapname (partitions[i], mapname, sizeof mapname); | ||
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CLEANUP_FREE char *key = read_key (partitions[i]); | ||
/* XXX Should we call guestfs_luks_open_ro if readonly flag | ||
* is set? This might break 'mount_ro'. | ||
*/ | ||
if (guestfs_luks_open (g, partitions[i], key, mapname) == -1) | ||
exit (EXIT_FAILURE); | ||
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need_rescan = 1; | ||
} | ||
} | ||
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if (need_rescan) { | ||
if (guestfs_vgscan (g) == -1) | ||
exit (EXIT_FAILURE); | ||
if (guestfs_vg_activate_all (g, 1) == -1) | ||
exit (EXIT_FAILURE); | ||
} | ||
} |
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