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[PATCH v5 8/9] cryptodisk: Move global variables into grub_cryptomount_a
From: |
Glenn Washburn |
Subject: |
[PATCH v5 8/9] cryptodisk: Move global variables into grub_cryptomount_args struct |
Date: |
Thu, 9 Dec 2021 11:14:57 -0600 |
Note that cargs.search_uuid does not need to be initialized in various parts
of the cryptomount argument parsing, just once when cargs is declared with a
struct initializer. The previous code used a global variable which would
retain the value across cryptomount invocations.
Signed-off-by: Glenn Washburn <development@efficientek.com>
---
grub-core/disk/cryptodisk.c | 24 +++++++++---------------
grub-core/disk/geli.c | 9 ++++-----
grub-core/disk/luks.c | 9 ++++-----
grub-core/disk/luks2.c | 8 ++++----
include/grub/cryptodisk.h | 9 +++++++--
5 files changed, 28 insertions(+), 31 deletions(-)
diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
index f8f6e3e25..99265097a 100644
--- a/grub-core/disk/cryptodisk.c
+++ b/grub-core/disk/cryptodisk.c
@@ -984,9 +984,6 @@ grub_util_cryptodisk_get_uuid (grub_disk_t disk)
#endif
-static int check_boot;
-static char *search_uuid;
-
static void
cryptodisk_close (grub_cryptodisk_t dev)
{
@@ -1014,7 +1011,7 @@ grub_cryptodisk_scan_device_real (const char *name,
FOR_CRYPTODISK_DEVS (cr)
{
- dev = cr->scan (source, search_uuid, check_boot);
+ dev = cr->scan (source, cargs);
if (grub_errno)
return NULL;
if (!dev)
@@ -1077,6 +1074,7 @@ grub_cryptodisk_cheat_mount (const char *sourcedev, const
char *cheat)
grub_cryptodisk_t dev;
grub_cryptodisk_dev_t cr;
grub_disk_t source;
+ struct grub_cryptomount_args cargs = {0};
/* Try to open disk. */
source = grub_disk_open (sourcedev);
@@ -1093,7 +1091,7 @@ grub_cryptodisk_cheat_mount (const char *sourcedev, const
char *cheat)
FOR_CRYPTODISK_DEVS (cr)
{
- dev = cr->scan (source, search_uuid, check_boot);
+ dev = cr->scan (source, &cargs);
if (grub_errno)
return grub_errno;
if (!dev)
@@ -1136,7 +1134,7 @@ grub_cryptodisk_scan_device (const char *name,
dev = grub_cryptodisk_scan_device_real (name, source, cargs);
if (dev)
{
- ret = (search_uuid != NULL && grub_strcasecmp (search_uuid, dev->uuid)
== 0);
+ ret = (cargs->search_uuid != NULL && grub_strcasecmp
(cargs->search_uuid, dev->uuid) == 0);
goto cleanup;
}
@@ -1147,7 +1145,7 @@ grub_cryptodisk_scan_device (const char *name,
if (grub_errno == GRUB_ERR_BAD_MODULE)
grub_error_pop ();
- if (search_uuid != NULL)
+ if (cargs->search_uuid != NULL)
/* Push error onto stack to save for cryptomount */
grub_error_push ();
else
@@ -1189,10 +1187,9 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int
argc, char **args)
return GRUB_ERR_NONE;
}
- check_boot = state[2].set;
- search_uuid = args[0];
+ cargs.check_boot = state[2].set;
+ cargs.search_uuid = args[0];
found_uuid = grub_device_iterate (&grub_cryptodisk_scan_device, &cargs);
- search_uuid = NULL;
if (found_uuid)
return GRUB_ERR_NONE;
@@ -1210,10 +1207,8 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int
argc, char **args)
}
else if (state[1].set || (argc == 0 && state[2].set)) /* -a|-b */
{
- search_uuid = NULL;
- check_boot = state[2].set;
+ cargs.check_boot = state[2].set;
grub_device_iterate (&grub_cryptodisk_scan_device, &cargs);
- search_uuid = NULL;
return GRUB_ERR_NONE;
}
else
@@ -1224,8 +1219,7 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int
argc, char **args)
char *disklast = NULL;
grub_size_t len;
- search_uuid = NULL;
- check_boot = state[2].set;
+ cargs.check_boot = state[2].set;
diskname = args[0];
len = grub_strlen (diskname);
if (len && diskname[0] == '(' && diskname[len - 1] == ')')
diff --git a/grub-core/disk/geli.c b/grub-core/disk/geli.c
index 7299a47d1..23789c43f 100644
--- a/grub-core/disk/geli.c
+++ b/grub-core/disk/geli.c
@@ -240,8 +240,7 @@ grub_util_get_geli_uuid (const char *dev)
#endif
static grub_cryptodisk_t
-configure_ciphers (grub_disk_t disk, const char *check_uuid,
- int boot_only)
+configure_ciphers (grub_disk_t disk, grub_cryptomount_args_t cargs)
{
grub_cryptodisk_t newdev;
struct grub_geli_phdr header;
@@ -289,7 +288,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
return NULL;
}
- if (boot_only && !(grub_le_to_cpu32 (header.flags) & GRUB_GELI_FLAGS_BOOT))
+ if (cargs->check_boot && !(grub_le_to_cpu32 (header.flags) &
GRUB_GELI_FLAGS_BOOT))
{
grub_dprintf ("geli", "not a boot volume\n");
return NULL;
@@ -302,9 +301,9 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
return NULL;
}
- if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
+ if (cargs->search_uuid != NULL && grub_strcasecmp (cargs->search_uuid, uuid)
!= 0)
{
- grub_dprintf ("geli", "%s != %s\n", uuid, check_uuid);
+ grub_dprintf ("geli", "%s != %s\n", uuid, cargs->search_uuid);
return NULL;
}
diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
index 39a7af6a4..f0feb3844 100644
--- a/grub-core/disk/luks.c
+++ b/grub-core/disk/luks.c
@@ -63,8 +63,7 @@ gcry_err_code_t AF_merge (const gcry_md_spec_t * hash,
grub_uint8_t * src,
grub_size_t blocknumbers);
static grub_cryptodisk_t
-configure_ciphers (grub_disk_t disk, const char *check_uuid,
- int check_boot)
+configure_ciphers (grub_disk_t disk, grub_cryptomount_args_t cargs)
{
grub_cryptodisk_t newdev;
const char *iptr;
@@ -76,7 +75,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
char hashspec[sizeof (header.hashSpec) + 1];
grub_err_t err;
- if (check_boot)
+ if (cargs->check_boot)
return NULL;
/* Read the LUKS header. */
@@ -103,9 +102,9 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
}
*optr = 0;
- if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
+ if (cargs->search_uuid != NULL && grub_strcasecmp (cargs->search_uuid, uuid)
!= 0)
{
- grub_dprintf ("luks", "%s != %s\n", uuid, check_uuid);
+ grub_dprintf ("luks", "%s != %s\n", uuid, cargs->search_uuid);
return NULL;
}
diff --git a/grub-core/disk/luks2.c b/grub-core/disk/luks2.c
index e6f9a22f8..6d7d1f0d0 100644
--- a/grub-core/disk/luks2.c
+++ b/grub-core/disk/luks2.c
@@ -346,14 +346,14 @@ luks2_read_header (grub_disk_t disk, grub_luks2_header_t
*outhdr)
}
static grub_cryptodisk_t
-luks2_scan (grub_disk_t disk, const char *check_uuid, int check_boot)
+luks2_scan (grub_disk_t disk, grub_cryptomount_args_t cargs)
{
grub_cryptodisk_t cryptodisk;
grub_luks2_header_t header;
char uuid[sizeof (header.uuid) + 1];
grub_size_t i, j;
- if (check_boot)
+ if (cargs->check_boot)
return NULL;
if (luks2_read_header (disk, &header))
@@ -367,9 +367,9 @@ luks2_scan (grub_disk_t disk, const char *check_uuid, int
check_boot)
uuid[j++] = header.uuid[i];
uuid[j] = '\0';
- if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
+ if (cargs->search_uuid != NULL && grub_strcasecmp (cargs->search_uuid, uuid)
!= 0)
{
- grub_dprintf ("luks2", "%s != %s\n", uuid, check_uuid);
+ grub_dprintf ("luks2", "%s != %s\n", uuid, cargs->search_uuid);
return NULL;
}
diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
index 5bd970692..c6524c9ea 100644
--- a/include/grub/cryptodisk.h
+++ b/include/grub/cryptodisk.h
@@ -69,7 +69,13 @@ typedef gcry_err_code_t
struct grub_cryptomount_args
{
+ /* scan: Flag to indicate that only bootable volumes should be decrypted */
+ grub_uint32_t check_boot : 1;
+ /* scan: Only volumes matching this UUID should be decrpyted */
+ char *search_uuid;
+ /* recover_key: Key data used to decrypt voume */
grub_uint8_t *key_data;
+ /* recover_key: Length of key_data */
grub_size_t key_len;
};
typedef struct grub_cryptomount_args *grub_cryptomount_args_t;
@@ -125,8 +131,7 @@ struct grub_cryptodisk_dev
struct grub_cryptodisk_dev *next;
struct grub_cryptodisk_dev **prev;
- grub_cryptodisk_t (*scan) (grub_disk_t disk, const char *check_uuid,
- int boot_only);
+ grub_cryptodisk_t (*scan) (grub_disk_t disk, grub_cryptomount_args_t cargs);
grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev,
grub_cryptomount_args_t cargs);
};
typedef struct grub_cryptodisk_dev *grub_cryptodisk_dev_t;
--
2.27.0
- [PATCH v5 4/9] cryptodisk: Improve error messaging in cryptomount invocations, (continued)
- [PATCH v5 4/9] cryptodisk: Improve error messaging in cryptomount invocations, Glenn Washburn, 2021/12/09
- [PATCH v5 3/9] cryptodisk: Return failure in cryptomount when no cryptodisk modules are loaded, Glenn Washburn, 2021/12/09
- [PATCH v5 5/9] cryptodisk: Improve cryptomount -u error message, Glenn Washburn, 2021/12/09
- [PATCH v5 7/9] cryptodisk: Refactor password input out of crypto dev modules into cryptodisk, Glenn Washburn, 2021/12/09
- [PATCH v5 6/9] cryptodisk: Add infrastructure to pass data from cryptomount to cryptodisk modules, Glenn Washburn, 2021/12/09
- [PATCH v5 8/9] cryptodisk: Move global variables into grub_cryptomount_args struct,
Glenn Washburn <=
- [PATCH v5 9/9] cryptodisk: Improve handling of partition name in cryptomount password prompt, Glenn Washburn, 2021/12/09
- Re: [PATCH v5 0/9] Refactor/improve cryptomount data passing to crypto modules, Daniel Kiper, 2021/12/20