#include <string.h>
#include <errno.h>
+#include <sys/mman.h>
#include <libcryptsetup.h>
+#include <libudev.h>
#include "log.h"
#include "util.h"
+#include "strv.h"
#include "ask-password-api.h"
-static unsigned opt_tries = 0;
+static const char *opt_type = NULL; /* LUKS1 or PLAIN */
static char *opt_cipher = NULL;
-static unsigned opt_size = 0;
+static unsigned opt_key_size = 0;
static char *opt_hash = NULL;
+static unsigned opt_tries = 0;
static bool opt_readonly = false;
static bool opt_verify = false;
-static usec_t arg_timeout = 0;
+static usec_t opt_timeout = 0;
+
+/* Options Debian's crypttab knows we don't:
+
+ offset=
+ skip=
+ precheck=
+ check=
+ checkargs=
+ noearly=
+ loud=
+ keyscript=
+*/
static int parse_one_option(const char *option) {
assert(option);
/* Handled outside of this tool */
- if (streq(option, "swap") ||
- streq(option, "tmp") ||
- streq(option, "noauto"))
+ if (streq(option, "noauto"))
return 0;
if (startswith(option, "cipher=")) {
} else if (startswith(option, "size=")) {
- if (safe_atou(option+5, &opt_size) < 0) {
+ if (safe_atou(option+5, &opt_key_size) < 0) {
log_error("size= parse failure, ignoring.");
return 0;
}
opt_readonly = true;
else if (streq(option, "verify"))
opt_verify = true;
+ else if (streq(option, "luks"))
+ opt_type = CRYPT_LUKS1;
+ else if (streq(option, "plain") ||
+ streq(option, "swap") ||
+ streq(option, "tmp"))
+ opt_type = CRYPT_PLAIN;
else if (startswith(option, "timeout=")) {
- if (parse_usec(option+8, &arg_timeout) < 0) {
+ if (parse_usec(option+8, &opt_timeout) < 0) {
log_error("timeout= parse failure, ignoring.");
return 0;
}
}
static void log_glue(int level, const char *msg, void *usrptr) {
-
- log_full(level == CRYPT_LOG_ERROR ? LOG_ERR :
- level == CRYPT_LOG_VERBOSE ? LOG_INFO :
- level == CRYPT_LOG_DEBUG ? LOG_DEBUG :
- LOG_NOTICE,
- "%s", msg);
+ log_debug("%s", msg);
}
-static int password_glue(const char *msg, char *buf, size_t length, void *usrptr) {
- usec_t until;
- char *password = NULL;
- int k;
+static char *disk_description(const char *path) {
+ struct udev *udev = NULL;
+ struct udev_device *device = NULL;
+ struct stat st;
+ char *description = NULL;
+ const char *model;
+
+ assert(path);
+
+ if (stat(path, &st) < 0)
+ return NULL;
- until = now(CLOCK_MONOTONIC) + (arg_timeout > 0 ? arg_timeout : 60 * USEC_PER_SEC);
+ if (!S_ISBLK(st.st_mode))
+ return NULL;
- if ((k = ask_password_agent(msg, "drive-harddisk", until, &password)) < 0)
- return k;
+ if (!(udev = udev_new()))
+ return NULL;
- strncpy(buf, password, length-1);
- buf[length-1] = 0;
+ if (!(device = udev_device_new_from_devnum(udev, 'b', st.st_rdev)))
+ goto finish;
+
+ if ((model = udev_device_get_property_value(device, "ID_MODEL_FROM_DATABASE")) ||
+ (model = udev_device_get_property_value(device, "ID_MODEL")))
+ description = strdup(model);
+
+finish:
+ if (device)
+ udev_device_unref(device);
- free(password);
+ if (udev)
+ udev_unref(udev);
- return strlen(buf);
+ return description;
}
int main(int argc, char *argv[]) {
int r = EXIT_FAILURE;
struct crypt_device *cd = NULL;
+ char **passwords = NULL, *truncated_cipher = NULL;
+ const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL, *name = NULL;
+ char *description = NULL;
if (argc < 3) {
log_error("This program requires at least two arguments.");
return EXIT_FAILURE;
}
- log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
+ log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
- if (streq(argv[1], "attach") ||
- streq(argv[1], "format-and-attach")) {
+ if (streq(argv[1], "attach")) {
uint32_t flags = 0;
int k;
+ unsigned try;
const char *key_file = NULL;
+ usec_t until;
+ crypt_status_info status;
if (argc < 4) {
log_error("attach requires at least two arguments.");
goto finish;
}
- if (argc >= 5 && argv[4][0] && !streq(argv[4], "-")) {
+ if (argc >= 5 &&
+ argv[4][0] &&
+ !streq(argv[4], "-") &&
+ !streq(argv[4], "none")) {
if (!path_is_absolute(argv[4]))
log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
parse_options(argv[5]);
+ /* A delicious drop of snake oil */
+ mlockall(MCL_FUTURE);
+
+ description = disk_description(argv[3]);
+ name = description ? description : argv[2];
+
if ((k = crypt_init(&cd, argv[3]))) {
log_error("crypt_init() failed: %s", strerror(-k));
goto finish;
}
crypt_set_log_callback(cd, log_glue, NULL);
- crypt_set_password_callback(cd, password_glue, NULL);
-
- if (streq(argv[1], "format-and-attach")) {
- /* Format with random key and attach */
-
- log_error("Formatting not yet supported.");
- goto finish;
-
- } else if ((k = crypt_load(cd, CRYPT_LUKS1, NULL))) {
- log_error("crypt_load() failed: %s", strerror(-k));
+ status = crypt_status(cd, argv[2]);
+ if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) {
+ log_info("Volume %s already active.", argv[2]);
+ r = EXIT_SUCCESS;
goto finish;
}
if (opt_readonly)
flags |= CRYPT_ACTIVATE_READONLY;
- if (key_file) {
- crypt_set_password_retry(cd, 1);
- k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, 0, flags);
- } else {
- crypt_set_password_retry(cd, opt_tries > 0 ? opt_tries : 3);
- k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, NULL, 0, flags);
+ until = now(CLOCK_MONOTONIC) + (opt_timeout > 0 ? opt_timeout : 60 * USEC_PER_SEC);
+
+ opt_tries = opt_tries > 0 ? opt_tries : 3;
+ opt_key_size = (opt_key_size > 0 ? opt_key_size : 256);
+ hash = opt_hash ? opt_hash : "ripemd160";
+
+ if (opt_cipher) {
+ size_t l;
+
+ l = strcspn(opt_cipher, "-");
+
+ if (!(truncated_cipher = strndup(opt_cipher, l))) {
+ log_error("Out of memory");
+ goto finish;
+ }
+
+ cipher = truncated_cipher;
+ cipher_mode = opt_cipher[l] ? opt_cipher+l+1 : "plain";
+ } else {
+ cipher = "aes";
+ cipher_mode = "cbc-essiv:sha256";
+ }
+
+ for (try = 0; try < opt_tries; try++) {
+ bool pass_volume_key = false;
+
+ strv_free(passwords);
+ passwords = NULL;
+
+ if (!key_file) {
+ char *text;
+ char **p;
+
+ if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) {
+ log_error("Out of memory");
+ goto finish;
+ }
+
+ k = ask_password_auto(text, "drive-harddisk", until, try == 0 && !opt_verify, &passwords);
+ free(text);
+
+ if (k < 0) {
+ log_error("Failed to query password: %s", strerror(-k));
+ goto finish;
+ }
+
+ if (opt_verify) {
+ char **passwords2 = NULL;
+
+ assert(strv_length(passwords) == 1);
+
+ if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) {
+ log_error("Out of memory");
+ goto finish;
+ }
+
+ k = ask_password_auto(text, "drive-harddisk", until, false, &passwords2);
+ free(text);
+
+ if (k < 0) {
+ log_error("Failed to query verification password: %s", strerror(-k));
+ goto finish;
+ }
+
+ assert(strv_length(passwords2) == 1);
+
+ if (!streq(passwords[0], passwords2[0])) {
+ log_warning("Passwords did not match, retrying.");
+ strv_free(passwords2);
+ continue;
+ }
+
+ strv_free(passwords2);
+ }
+
+ STRV_FOREACH(p, passwords) {
+ char *c;
+
+ if (strlen(*p)+1 >= opt_key_size)
+ continue;
+
+ /* Pad password if necessary */
+ if (!(c = new(char, opt_key_size))) {
+ log_error("Out of memory.");
+ goto finish;
+ }
+
+ strncpy(c, *p, opt_key_size);
+ free(*p);
+ *p = c;
+ }
+ }
+
+ if (!opt_type || streq(opt_type, CRYPT_LUKS1))
+ k = crypt_load(cd, CRYPT_LUKS1, NULL);
+
+ if ((!opt_type && k < 0) || streq_ptr(opt_type, CRYPT_PLAIN)) {
+ struct crypt_params_plain params;
+
+ zero(params);
+ params.hash = hash;
+
+ /* In contrast to what the name
+ * crypt_setup() might suggest this
+ * doesn't actually format anything,
+ * it just configures encryption
+ * parameters when used for plain
+ * mode. */
+ k = crypt_format(cd, CRYPT_PLAIN,
+ cipher,
+ cipher_mode,
+ NULL,
+ NULL,
+ opt_key_size / 8,
+ ¶ms);
+
+ pass_volume_key = streq(hash, "plain");
+ }
+
+ if (k < 0) {
+ log_error("Loading of cryptographic parameters failed: %s", strerror(-k));
+ goto finish;
+ }
+
+ log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
+ crypt_get_cipher(cd),
+ crypt_get_cipher_mode(cd),
+ crypt_get_volume_key_size(cd)*8,
+ argv[3]);
+
+ if (key_file)
+ k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, opt_key_size, flags);
+ else {
+ char **p;
+
+ STRV_FOREACH(p, passwords) {
+
+ if (pass_volume_key)
+ k = crypt_activate_by_volume_key(cd, argv[2], *p, opt_key_size, flags);
+ else
+ k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, *p, strlen(*p), flags);
+
+ if (k >= 0)
+ break;
+ }
+ }
+
+ if (k >= 0)
+ break;
+
+ if (k != -EPERM) {
+ log_error("Failed to activate: %s", strerror(-k));
+ goto finish;
+ }
+
+ log_warning("Invalid passphrase.");
}
- if (k < 0) {
- log_error("Failed to activate: %s", strerror(-k));
+ if (try >= opt_tries) {
+ log_error("Too many attempts.");
+ r = EXIT_FAILURE;
goto finish;
}
if (cd)
crypt_free(cd);
+ free(opt_cipher);
+ free(opt_hash);
+
+ free(truncated_cipher);
+
+ strv_free(passwords);
+
+ free(description);
+
return r;
}
~ianmdlvl / elogind.git / blobdiff