Fix directio (again).
[platform/upstream/cryptsetup.git] / src / cryptsetup.c
index 141d0d8..89040cc 100644 (file)
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2004, Christophe Saout <christophe@saout.de>
  * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
- * Copyright (C) 2009-2011, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
 #include <inttypes.h>
 #include <errno.h>
 #include <unistd.h>
+#include <ctype.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <assert.h>
 #include <limits.h>
-#include <libcryptsetup.h>
 #include <popt.h>
 
 #include "cryptsetup.h"
@@ -49,6 +49,8 @@ static const char *opt_header_device = NULL;
 static int opt_key_size = 0;
 static long opt_keyfile_size = 0;
 static long opt_new_keyfile_size = 0;
+static long opt_keyfile_offset = 0;
+static long opt_new_keyfile_offset = 0;
 static int opt_key_slot = CRYPT_ANY_SLOT;
 static uint64_t opt_size = 0;
 static uint64_t opt_offset = 0;
@@ -88,6 +90,7 @@ static int action_luksResume(int arg);
 static int action_luksBackup(int arg);
 static int action_luksRestore(int arg);
 static int action_loopaesOpen(int arg);
+static int action_luksRepair(int arg);
 
 static struct action_type {
        const char *type;
@@ -102,6 +105,7 @@ static struct action_type {
        { "remove",     action_remove,          0, 1, 1, N_("<name>"), N_("remove device") },
        { "resize",     action_resize,          0, 1, 1, N_("<name>"), N_("resize active device") },
        { "status",     action_status,          0, 1, 0, N_("<name>"), N_("show device status") },
+       { "repair",     action_luksRepair,      0, 1, 1, N_("<device>"), N_("try to repair on-disk metadata") },
        { "luksFormat", action_luksFormat,      0, 1, 1, N_("<device> [<new key file>]"), N_("formats a LUKS device") },
        { "luksOpen",   action_luksOpen,        0, 2, 1, N_("<device> <name> "), N_("open LUKS device as mapping <name>") },
        { "luksAddKey", action_luksAddKey,      0, 1, 1, N_("<device> [<new key file>]"), N_("add key to LUKS device") },
@@ -246,6 +250,31 @@ static void show_status(int errcode)
                log_err(".\n");
 }
 
+static const char *uuid_or_device(const char *spec)
+{
+       static char device[PATH_MAX];
+       char s, *ptr;
+       int i = 0, uuid_len = 5;
+
+       /* Check if it is correct UUID=<LUKS_UUID> format */
+       if (spec && !strncmp(spec, "UUID=", uuid_len)) {
+               strcpy(device, "/dev/disk/by-uuid/");
+               ptr = &device[strlen(device)];
+               i = uuid_len;
+               while ((s = spec[i++]) && i < PATH_MAX) {
+                       if (!isxdigit(s) && s != '-')
+                               return spec; /* Bail it out */
+                       if (isalpha(s))
+                               s = tolower(s);
+                       *ptr++ = s;
+               }
+               *ptr = '\0';
+               return device;
+       }
+
+       return spec;
+}
+
 static int action_create(int arg __attribute__((unused)))
 {
        struct crypt_device *cd = NULL;
@@ -269,9 +298,9 @@ static int action_create(int arg __attribute__((unused)))
        if (opt_key_file && strcmp(opt_key_file, "-"))
                params.hash = NULL;
 
-       if (opt_keyfile_size && opt_key_file)
-               log_std(("Ignoring keyfile size option, keyfile read size "
-                        "is always the same as encryption key size.\n"));
+       if ((opt_keyfile_offset || opt_keyfile_size) && opt_key_file)
+               log_std(("Ignoring keyfile offset and size options, keyfile read "
+                        "size is always the same as encryption key size.\n"));
 
        r = crypt_parse_name_and_mode(opt_cipher ?: DEFAULT_CIPHER(PLAIN),
                                      cipher, NULL, cipher_mode);
@@ -305,12 +334,14 @@ static int action_create(int arg __attribute__((unused)))
 
        if (opt_key_file)
                /* With hashing, read the whole keyfile */
-               r = crypt_activate_by_keyfile(cd, action_argv[0],
-                       CRYPT_ANY_SLOT, opt_key_file, params.hash ? 0 : key_size,
+               r = crypt_activate_by_keyfile_offset(cd, action_argv[0],
+                       CRYPT_ANY_SLOT, opt_key_file,
+                       params.hash ? 0 : key_size, 0,
                        activate_flags);
        else {
                r = crypt_get_key(_("Enter passphrase: "),
-                                 &password, &passwordLen, opt_keyfile_size,
+                                 &password, &passwordLen,
+                                 opt_keyfile_offset, opt_keyfile_size,
                                  NULL, opt_timeout,
                                  _verify_passphrase(0),
                                  cd);
@@ -358,8 +389,9 @@ static int action_loopaesOpen(int arg __attribute__((unused)))
        if (r < 0)
                goto out;
 
-       r = crypt_activate_by_keyfile(cd, action_argv[1], CRYPT_ANY_SLOT,
-                                     opt_key_file, opt_keyfile_size, activate_flags);
+       r = crypt_activate_by_keyfile_offset(cd, action_argv[1], CRYPT_ANY_SLOT,
+                                     opt_key_file, opt_keyfile_size,
+                                     opt_keyfile_size, activate_flags);
 out:
        crypt_free(cd);
 
@@ -457,6 +489,8 @@ static int action_status(int arg __attribute__((unused)))
        }
 out:
        crypt_free(cd);
+       if (r == -ENOTSUP)
+               r = 0;
        return r;
 }
 
@@ -486,6 +520,32 @@ fail:
        return -EINVAL;
 }
 
+static int action_luksRepair(int arg __attribute__((unused)))
+{
+       struct crypt_device *cd = NULL;
+       int r;
+
+       if ((r = crypt_init(&cd, action_argv[0])))
+               goto out;
+
+       /* Currently only LUKS1 allows repair */
+       crypt_set_log_callback(cd, _quiet_log, NULL);
+       r = crypt_load(cd, CRYPT_LUKS1, NULL);
+       crypt_set_log_callback(cd, _log, NULL);
+       if (r == 0) {
+               log_verbose( _("No known problems detected for LUKS header.\n"));
+               goto out;
+       }
+
+       r = _yesDialog(_("Really try to repair LUKS device header?"),
+                      NULL) ? 0 : -EINVAL;
+       if (r == 0)
+               r = crypt_repair(cd, CRYPT_LUKS1, NULL);
+out:
+       crypt_free(cd);
+       return r;
+}
+
 static int action_luksFormat(int arg __attribute__((unused)))
 {
        int r = -EINVAL, keysize;
@@ -538,8 +598,8 @@ static int action_luksFormat(int arg __attribute__((unused)))
                crypt_set_rng_type(cd, CRYPT_RNG_URANDOM);
 
        r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen,
-                         opt_keyfile_size, opt_key_file, opt_timeout,
-                         _verify_passphrase(1), cd);
+                         opt_keyfile_offset, opt_keyfile_size, opt_key_file,
+                         opt_timeout, _verify_passphrase(1), cd);
        if (r < 0)
                goto out;
 
@@ -574,10 +634,10 @@ static int action_luksOpen(int arg __attribute__((unused)))
        int r, keysize;
 
        if (opt_header_device) {
-               header_device = opt_header_device;
+               header_device = uuid_or_device(opt_header_device);
                data_device = action_argv[0];
        } else {
-               header_device = action_argv[0];
+               header_device = uuid_or_device(action_argv[0]);
                data_device = NULL;
        }
 
@@ -619,9 +679,9 @@ static int action_luksOpen(int arg __attribute__((unused)))
                                                 key, keysize, flags);
        } else if (opt_key_file) {
                crypt_set_password_retry(cd, 1);
-               r = crypt_activate_by_keyfile(cd, action_argv[1],
+               r = crypt_activate_by_keyfile_offset(cd, action_argv[1],
                        opt_key_slot, opt_key_file, opt_keyfile_size,
-                       flags);
+                       opt_keyfile_offset, flags);
        } else
                r = crypt_activate_by_passphrase(cd, action_argv[1],
                        opt_key_slot, NULL, 0, flags);
@@ -633,7 +693,8 @@ out:
 
 static int verify_keyslot(struct crypt_device *cd, int key_slot,
                          char *msg_last, char *msg_pass,
-                         const char *key_file, int keyfile_size)
+                         const char *key_file, int keyfile_offset,
+                         int keyfile_size)
 {
        crypt_keyslot_info ki;
        char *password = NULL;
@@ -645,7 +706,7 @@ static int verify_keyslot(struct crypt_device *cd, int key_slot,
                return -EPERM;
 
        r = crypt_get_key(msg_pass, &password, &passwordLen,
-                         keyfile_size, key_file, opt_timeout,
+                         keyfile_offset, keyfile_size, key_file, opt_timeout,
                          _verify_passphrase(0), cd);
        if(r < 0)
                goto out;
@@ -680,7 +741,7 @@ static int action_luksKillSlot(int arg __attribute__((unused)))
        struct crypt_device *cd = NULL;
        int r;
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        crypt_set_confirm_callback(cd, _yesDialog, NULL);
@@ -705,7 +766,7 @@ static int action_luksKillSlot(int arg __attribute__((unused)))
                r = verify_keyslot(cd, opt_key_slot,
                        _("This is the last keyslot. Device will become unusable after purging this key."),
                        _("Enter any remaining LUKS passphrase: "),
-                       opt_key_file, opt_keyfile_size);
+                       opt_key_file, opt_keyfile_offset, opt_keyfile_size);
                if (r < 0)
                        goto out;
        }
@@ -723,7 +784,7 @@ static int action_luksRemoveKey(int arg __attribute__((unused)))
        size_t passwordLen;
        int r;
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        crypt_set_confirm_callback(cd, _yesDialog, NULL);
@@ -734,7 +795,7 @@ static int action_luksRemoveKey(int arg __attribute__((unused)))
 
        r = crypt_get_key(_("Enter LUKS passphrase to be deleted: "),
                      &password, &passwordLen,
-                     opt_keyfile_size, opt_key_file,
+                     opt_keyfile_offset, opt_keyfile_size, opt_key_file,
                      opt_timeout,
                      _verify_passphrase(0),
                      cd);
@@ -771,7 +832,7 @@ static int action_luksAddKey(int arg __attribute__((unused)))
        const char *opt_new_key_file = (action_argc > 1 ? action_argv[1] : NULL);
        struct crypt_device *cd = NULL;
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        crypt_set_confirm_callback(cd, _yesDialog, NULL);
@@ -794,9 +855,9 @@ static int action_luksAddKey(int arg __attribute__((unused)))
                r = crypt_keyslot_add_by_volume_key(cd, opt_key_slot,
                                                    key, keysize, NULL, 0);
        } else if (opt_key_file || opt_new_key_file) {
-               r = crypt_keyslot_add_by_keyfile(cd, opt_key_slot,
-                                                opt_key_file, opt_keyfile_size,
-                                                opt_new_key_file, opt_new_keyfile_size);
+               r = crypt_keyslot_add_by_keyfile_offset(cd, opt_key_slot,
+                       opt_key_file, opt_keyfile_size, opt_keyfile_offset,
+                       opt_new_key_file, opt_new_keyfile_size, opt_new_keyfile_offset);
        } else {
                r = crypt_keyslot_add_by_passphrase(cd, opt_key_slot,
                                                    NULL, 0, NULL, 0);
@@ -826,7 +887,7 @@ static int action_luksChangeKey(int arg __attribute__((unused)))
        size_t vk_size;
        int new_key_slot, old_key_slot, r;
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        if ((r = crypt_load(cd, CRYPT_LUKS1, NULL)))
@@ -837,8 +898,8 @@ static int action_luksChangeKey(int arg __attribute__((unused)))
 
        r = crypt_get_key(_("Enter LUKS passphrase to be changed: "),
                      &password, &passwordLen,
-                     opt_keyfile_size, opt_key_file, opt_timeout,
-                     _verify_passphrase(0), cd);
+                     opt_keyfile_offset, opt_keyfile_size, opt_key_file,
+                     opt_timeout, _verify_passphrase(0), cd);
        if (r < 0)
                goto out;
 
@@ -874,7 +935,8 @@ static int action_luksChangeKey(int arg __attribute__((unused)))
        passwordLen = 0;
        r = crypt_get_key(_("Enter new LUKS passphrase: "),
                          &password, &passwordLen,
-                         opt_new_keyfile_size, opt_new_key_file,
+                         opt_new_keyfile_offset, opt_new_keyfile_size,
+                         opt_new_key_file,
                          opt_timeout, _verify_passphrase(0), cd);
        if (r < 0)
                goto out;
@@ -967,7 +1029,8 @@ static int luksDump_with_volume_key(struct crypt_device *cd)
                return -ENOMEM;
 
        r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen,
-                         opt_keyfile_size, opt_key_file, opt_timeout, 0, cd);
+                         opt_keyfile_offset, opt_keyfile_size, opt_key_file,
+                         opt_timeout, 0, cd);
        if (r < 0)
                goto out;
 
@@ -1002,7 +1065,7 @@ static int action_luksDump(int arg __attribute__((unused)))
        struct crypt_device *cd = NULL;
        int r;
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        if ((r = crypt_load(cd, CRYPT_LUKS1, NULL)))
@@ -1043,8 +1106,8 @@ static int action_luksResume(int arg __attribute__((unused)))
        crypt_set_password_verify(cd, _verify_passphrase(0));
 
        if (opt_key_file)
-               r = crypt_resume_by_keyfile(cd, action_argv[0], CRYPT_ANY_SLOT,
-                                           opt_key_file, opt_keyfile_size);
+               r = crypt_resume_by_keyfile_offset(cd, action_argv[0], CRYPT_ANY_SLOT,
+                       opt_key_file, opt_keyfile_size, opt_keyfile_offset);
        else
                r = crypt_resume_by_passphrase(cd, action_argv[0], CRYPT_ANY_SLOT,
                                               NULL, 0);
@@ -1063,7 +1126,7 @@ static int action_luksBackup(int arg __attribute__((unused)))
                return -EINVAL;
        }
 
-       if ((r = crypt_init(&cd, action_argv[0])))
+       if ((r = crypt_init(&cd, uuid_or_device(action_argv[0]))))
                goto out;
 
        crypt_set_confirm_callback(cd, _yesDialog, NULL);
@@ -1221,7 +1284,9 @@ int main(int argc, const char **argv)
                { "dump-master-key",  '\0',  POPT_ARG_NONE, &opt_dump_master_key,       0, N_("Dump volume (master) key instead of keyslots info."), NULL },
                { "key-size",          's',  POPT_ARG_INT, &opt_key_size,               0, N_("The size of the encryption key"), N_("BITS") },
                { "keyfile-size",      'l',  POPT_ARG_LONG, &opt_keyfile_size,          0, N_("Limits the read from keyfile"), N_("bytes") },
+               { "keyfile-offset",   '\0',  POPT_ARG_LONG, &opt_keyfile_offset,        0, N_("Number of bytes to skip in keyfile"), N_("bytes") },
                { "new-keyfile-size", '\0',  POPT_ARG_LONG, &opt_new_keyfile_size,      0, N_("Limits the read from newly added keyfile"), N_("bytes") },
+               { "new-keyfile-offset",'\0', POPT_ARG_LONG, &opt_new_keyfile_offset,    0, N_("Number of bytes to skip in newly added keyfile"), N_("bytes") },
                { "key-slot",          'S',  POPT_ARG_INT, &opt_key_slot,               0, N_("Slot number for new key (default is first free)"), NULL },
                { "size",              'b',  POPT_ARG_STRING, &popt_tmp,                1, N_("The size of the device"), N_("SECTORS") },
                { "offset",            'o',  POPT_ARG_STRING, &popt_tmp,                2, N_("The start offset in the backend device"), N_("SECTORS") },
@@ -1253,9 +1318,11 @@ int main(int argc, const char **argv)
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);
 
+       crypt_fips_self_check(NULL);
+
        popt_context = poptGetContext(PACKAGE, argc, argv, popt_options, 0);
        poptSetOtherOptionHelp(popt_context,
-                              N_("[OPTION...] <action> <action-specific>]"));
+                              N_("[OPTION...] <action> <action-specific>"));
 
        while((r = poptGetNextOpt(popt_context)) > 0) {
                unsigned long long ull_value;
@@ -1369,7 +1436,8 @@ int main(int argc, const char **argv)
                        opt_key_file = action_argv[1];
        }
 
-       if (opt_keyfile_size < 0 || opt_new_keyfile_size < 0 || opt_key_size < 0) {
+       if (opt_keyfile_size < 0 || opt_new_keyfile_size < 0 || opt_key_size < 0 ||
+           opt_keyfile_offset < 0 || opt_new_keyfile_offset < 0) {
                usage(popt_context, EXIT_FAILURE,
                      _("Negative number for option not permitted."),
                      poptGetInvocationName(popt_context));
@@ -1378,6 +1446,7 @@ int main(int argc, const char **argv)
        if (opt_random && opt_urandom)
                usage(popt_context, EXIT_FAILURE, _("Only one of --use-[u]random options is allowed."),
                      poptGetInvocationName(popt_context));
+
        if ((opt_random || opt_urandom) && strcmp(aname, "luksFormat"))
                usage(popt_context, EXIT_FAILURE, _("Option --use-[u]random is allowed only for luksFormat."),
                      poptGetInvocationName(popt_context));
@@ -1386,6 +1455,10 @@ int main(int argc, const char **argv)
                usage(popt_context, EXIT_FAILURE, _("Option --uuid is allowed only for luksFormat and luksUUID."),
                      poptGetInvocationName(popt_context));
 
+       if (opt_align_payload && strcmp(aname, "luksFormat"))
+               usage(popt_context, EXIT_FAILURE, _("Option --align-payload is allowed only for luksFormat."),
+                     poptGetInvocationName(popt_context));
+
        if (opt_skip && strcmp(aname, "create") && strcmp(aname, "loopaesOpen"))
                usage(popt_context, EXIT_FAILURE,
                _("Option --skip is supported only for create and loopaesOpen commands.\n"),