***/
#include <string.h>
+#include <errno.h>
+
+#include <libcryptsetup.h>
#include "log.h"
#include "util.h"
+#include "ask-password-api.h"
+
+static const char *opt_type = NULL; /* LUKS1 or PLAIN */
+static char *opt_cipher = NULL;
+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 opt_timeout = 0;
+
+static int parse_one_option(const char *option) {
+ assert(option);
+
+ /* Handled outside of this tool */
+ if (streq(option, "noauto"))
+ return 0;
+
+ if (startswith(option, "cipher=")) {
+ char *t;
+
+ if (!(t = strdup(option+7)))
+ return -ENOMEM;
+
+ free(opt_cipher);
+ opt_cipher = t;
+
+ } else if (startswith(option, "size=")) {
+
+ if (safe_atou(option+5, &opt_key_size) < 0) {
+ log_error("size= parse failure, ignoring.");
+ return 0;
+ }
+
+ } else if (startswith(option, "hash=")) {
+ char *t;
+
+ if (!(t = strdup(option+5)))
+ return -ENOMEM;
+
+ free(opt_hash);
+ opt_hash = t;
+
+ } else if (startswith(option, "tries=")) {
+
+ if (safe_atou(option+6, &opt_tries) < 0) {
+ log_error("tries= parse failure, ignoring.");
+ return 0;
+ }
+
+ } else if (streq(option, "readonly"))
+ 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, &opt_timeout) < 0) {
+ log_error("timeout= parse failure, ignoring.");
+ return 0;
+ }
+
+ } else
+ log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
+
+ return 0;
+}
+
+static int parse_options(const char *options) {
+ char *state;
+ char *w;
+ size_t l;
+
+ assert(options);
+
+ FOREACH_WORD_SEPARATOR(w, l, options, ",", state) {
+ char *o;
+ int r;
+
+ if (!(o = strndup(w, l)))
+ return -ENOMEM;
+
+ r = parse_one_option(o);
+ free(o);
+
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static void log_glue(int level, const char *msg, void *usrptr) {
+ log_debug("%s", msg);
+}
int main(int argc, char *argv[]) {
- int r = EXIT_SUCCESS;
+ int r = EXIT_FAILURE;
+ struct crypt_device *cd = NULL;
+ char *password = NULL, *truncated_cipher = NULL;
+ const char *cipher = NULL, *cipher_mode = NULL, *hash = 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], "create")) {
+ 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 (!path_is_absolute(argv[4]))
+ log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
+ else
+ key_file = argv[4];
+ }
+
+ if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
+ parse_options(argv[5]);
+
+ 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);
+
+ 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;
- } else if (streq(argv[1], "format")) {
+ 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";
- } else if (streq(argv[1], "remove")) {
+ 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;
+
+ free(password);
+ password = NULL;
+
+ if (!key_file) {
+
+ if ((k = ask_password_auto("Please enter passphrase for disk:", "drive-harddisk", until, &password)) < 0) {
+ log_error("Failed to query password: %s", strerror(-k));
+ goto finish;
+ }
+
+ if (opt_verify) {
+ char *password2 = NULL;
+
+ if ((k = ask_password_auto("Please enter passphrase for disk (verification):", "drive-harddisk", until, &password2)) < 0) {
+ log_error("Failed to query verification password: %s", strerror(-k));
+ goto finish;
+ }
+
+ if (!streq(password, password2)) {
+ log_warning("Passwords did not match, retrying.");
+ free(password2);
+ continue;
+ }
+
+ free(password2);
+ }
+
+ if (strlen(password)+1 < opt_key_size) {
+ char *c;
+
+ /* Pad password if necessary */
+
+ if (!(c = new(char, opt_key_size))) {
+ log_error("Out of memory.");
+ goto finish;
+ }
+
+ strncpy(c, password, opt_key_size);
+ free(password);
+ password = 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 if (pass_volume_key)
+ k = crypt_activate_by_volume_key(cd, argv[2], password, opt_key_size, flags);
+ else
+ k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, password, strlen(password), flags);
+
+ if (k >= 0)
+ break;
+
+ if (k != -EPERM) {
+ log_error("Failed to activate: %s", strerror(-k));
+ goto finish;
+ }
+
+ log_warning("Invalid passphrase.");
+ }
+
+ if (try >= opt_tries) {
+ log_error("Too many attempts.");
+ r = EXIT_FAILURE;
+ }
+
+ } else if (streq(argv[1], "detach")) {
+ int k;
+
+ if ((k = crypt_init_by_name(&cd, argv[2]))) {
+ log_error("crypt_init() failed: %s", strerror(-k));
+ goto finish;
+ }
+
+ crypt_set_log_callback(cd, log_glue, NULL);
+
+ if ((k = crypt_deactivate(cd, argv[2])) < 0) {
+ log_error("Failed to deactivate: %s", strerror(-k));
+ goto finish;
+ }
} else {
log_error("Unknown verb %s.", argv[1]);
goto finish;
}
+ r = EXIT_SUCCESS;
+
finish:
+
+ if (cd)
+ crypt_free(cd);
+
+ free(opt_cipher);
+ free(opt_hash);
+
+ free(truncated_cipher);
+
+ free(password);
+
return r;
}
~ianmdlvl / elogind.git / blobdiff