X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcryptsetup%2Fcryptsetup.c;h=9b9074c52ad0c49af3aa3adfd1cb68caf6c314a7;hp=22b5eead72d3e804557e602090f86cb781734527;hb=ac1a87b9f2d085ef1f976a79042fe8797da9b329;hpb=404dac4d96f4aaf66026e8b412c4b67e8773cffa diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c index 22b5eead7..9b9074c52 100644 --- a/src/cryptsetup/cryptsetup.c +++ b/src/cryptsetup/cryptsetup.c @@ -25,7 +25,6 @@ #include #include -#include #include "fileio.h" #include "log.h" @@ -34,21 +33,24 @@ #include "strv.h" #include "ask-password-api.h" #include "def.h" - -static const char *opt_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ -static char *opt_cipher = NULL; -static unsigned opt_key_size = 0; -static unsigned opt_keyfile_size = 0; -static unsigned opt_keyfile_offset = 0; -static char *opt_hash = NULL; -static unsigned opt_tries = 3; -static bool opt_readonly = false; -static bool opt_verify = false; -static bool opt_discards = false; -static bool opt_tcrypt_hidden = false; -static bool opt_tcrypt_system = false; -static char **opt_tcrypt_keyfiles = NULL; -static usec_t opt_timeout = 0; +#include "libudev.h" +#include "udev-util.h" + +static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ +static char *arg_cipher = NULL; +static unsigned arg_key_size = 0; +static int arg_key_slot = CRYPT_ANY_SLOT; +static unsigned arg_keyfile_size = 0; +static unsigned arg_keyfile_offset = 0; +static char *arg_hash = NULL; +static unsigned arg_tries = 3; +static bool arg_readonly = false; +static bool arg_verify = false; +static bool arg_discards = false; +static bool arg_tcrypt_hidden = false; +static bool arg_tcrypt_system = false; +static char **arg_tcrypt_keyfiles = NULL; +static usec_t arg_timeout = 0; /* Options Debian's crypttab knows we don't: @@ -74,36 +76,45 @@ static int parse_one_option(const char *option) { t = strdup(option+7); if (!t) - return -ENOMEM; + return log_oom(); - free(opt_cipher); - opt_cipher = t; + free(arg_cipher); + arg_cipher = t; } else if (startswith(option, "size=")) { - if (safe_atou(option+5, &opt_key_size) < 0) { + if (safe_atou(option+5, &arg_key_size) < 0) { log_error("size= parse failure, ignoring."); return 0; } + } else if (startswith(option, "key-slot=")) { + + arg_type = CRYPT_LUKS1; + if (safe_atoi(option+9, &arg_key_slot) < 0) { + log_error("key-slot= parse failure, ignoring."); + return 0; + } + } else if (startswith(option, "tcrypt-keyfile=")) { - opt_type = CRYPT_TCRYPT; - if (path_is_absolute(option+15)) - opt_tcrypt_keyfiles = strv_append(opt_tcrypt_keyfiles, strdup(option+15)); - else + arg_type = CRYPT_TCRYPT; + if (path_is_absolute(option+15)) { + if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) + return log_oom(); + } else log_error("Key file path '%s' is not absolute. Ignoring.", option+15); } else if (startswith(option, "keyfile-size=")) { - if (safe_atou(option+13, &opt_keyfile_size) < 0) { + if (safe_atou(option+13, &arg_keyfile_size) < 0) { log_error("keyfile-size= parse failure, ignoring."); return 0; } } else if (startswith(option, "keyfile-offset=")) { - if (safe_atou(option+15, &opt_keyfile_offset) < 0) { + if (safe_atou(option+15, &arg_keyfile_offset) < 0) { log_error("keyfile-offset= parse failure, ignoring."); return 0; } @@ -113,41 +124,39 @@ static int parse_one_option(const char *option) { t = strdup(option+5); if (!t) - return -ENOMEM; + return log_oom(); - free(opt_hash); - opt_hash = t; + free(arg_hash); + arg_hash = t; } else if (startswith(option, "tries=")) { - if (safe_atou(option+6, &opt_tries) < 0) { + if (safe_atou(option+6, &arg_tries) < 0) { log_error("tries= parse failure, ignoring."); return 0; } - } else if (streq(option, "readonly") || streq(option, "read-only")) - opt_readonly = true; + } else if (STR_IN_SET(option, "readonly", "read-only")) + arg_readonly = true; else if (streq(option, "verify")) - opt_verify = true; - else if (streq(option, "allow-discards") || streq(option, "discard")) - opt_discards = true; + arg_verify = true; + else if (STR_IN_SET(option, "allow-discards", "discard")) + arg_discards = true; else if (streq(option, "luks")) - opt_type = CRYPT_LUKS1; + arg_type = CRYPT_LUKS1; else if (streq(option, "tcrypt")) - opt_type = CRYPT_TCRYPT; + arg_type = CRYPT_TCRYPT; else if (streq(option, "tcrypt-hidden")) { - opt_type = CRYPT_TCRYPT; - opt_tcrypt_hidden = true; + arg_type = CRYPT_TCRYPT; + arg_tcrypt_hidden = true; } else if (streq(option, "tcrypt-system")) { - opt_type = CRYPT_TCRYPT; - opt_tcrypt_system = true; - } else if (streq(option, "plain") || - streq(option, "swap") || - streq(option, "tmp")) - opt_type = CRYPT_PLAIN; + arg_type = CRYPT_TCRYPT; + arg_tcrypt_system = true; + } else if (STR_IN_SET(option, "plain", "swap", "tmp")) + arg_type = CRYPT_PLAIN; else if (startswith(option, "timeout=")) { - if (parse_sec(option+8, &opt_timeout) < 0) { + if (parse_sec(option+8, &arg_timeout) < 0) { log_error("timeout= parse failure, ignoring."); return 0; } @@ -183,19 +192,17 @@ static void log_glue(int level, const char *msg, void *usrptr) { log_debug("%s", msg); } -static char *disk_description(const char *path) { +static char* disk_description(const char *path) { - static const char name_fields[] = { + static const char name_fields[] = "ID_PART_ENTRY_NAME\0" "DM_NAME\0" "ID_MODEL_FROM_DATABASE\0" - "ID_MODEL\0" - }; + "ID_MODEL\0"; - struct udev *udev = NULL; - struct udev_device *device = NULL; + _cleanup_udev_unref_ struct udev *udev = NULL; + _cleanup_udev_device_unref_ struct udev_device *device = NULL; struct stat st; - char *description = NULL; const char *i; assert(path); @@ -212,54 +219,38 @@ static char *disk_description(const char *path) { device = udev_device_new_from_devnum(udev, 'b', st.st_rdev); if (!device) - goto finish; + return NULL; NULSTR_FOREACH(i, name_fields) { const char *name; name = udev_device_get_property_value(device, i); - if (!isempty(name)) { - description = strdup(name); - break; - } + if (!isempty(name)) + return strdup(name); } -finish: - if (device) - udev_device_unref(device); - - if (udev) - udev_unref(udev); - - return description; + return NULL; } static char *disk_mount_point(const char *label) { - char *mp = NULL; _cleanup_free_ char *device = NULL; - FILE *f = NULL; + _cleanup_endmntent_ FILE *f = NULL; struct mntent *m; /* Yeah, we don't support native systemd unit files here for now */ if (asprintf(&device, "/dev/mapper/%s", label) < 0) - goto finish; + return NULL; f = setmntent("/etc/fstab", "r"); if (!f) - goto finish; + return NULL; while ((m = getmntent(f))) - if (path_equal(m->mnt_fsname, device)) { - mp = strdup(m->mnt_dir); - break; - } - -finish: - if (f) - endmntent(f); + if (path_equal(m->mnt_fsname, device)) + return strdup(m->mnt_dir); - return mp; + return NULL; } static int get_password(const char *name, usec_t until, bool accept_cached, char ***passwords) { @@ -279,7 +270,7 @@ static int get_password(const char *name, usec_t until, bool accept_cached, char return r; } - if (opt_verify) { + if (arg_verify) { _cleanup_strv_free_ char **passwords2 = NULL; assert(strv_length(*passwords) == 1); @@ -306,14 +297,14 @@ static int get_password(const char *name, usec_t until, bool accept_cached, char STRV_FOREACH(p, *passwords) { char *c; - if (strlen(*p)+1 >= opt_key_size) + if (strlen(*p)+1 >= arg_key_size) continue; /* Pad password if necessary */ - if (!(c = new(char, opt_key_size))) + if (!(c = new(char, arg_key_size))) return log_oom(); - strncpy(c, *p, opt_key_size); + strncpy(c, *p, arg_key_size); free(*p); *p = c; } @@ -330,18 +321,18 @@ static int attach_tcrypt(struct crypt_device *cd, _cleanup_free_ char *passphrase = NULL; struct crypt_params_tcrypt params = { .flags = CRYPT_TCRYPT_LEGACY_MODES, - .keyfiles = (const char **)opt_tcrypt_keyfiles, - .keyfiles_count = strv_length(opt_tcrypt_keyfiles) + .keyfiles = (const char **)arg_tcrypt_keyfiles, + .keyfiles_count = strv_length(arg_tcrypt_keyfiles) }; assert(cd); assert(name); assert(key_file || passwords); - if (opt_tcrypt_hidden) + if (arg_tcrypt_hidden) params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; - if (opt_tcrypt_system) + if (arg_tcrypt_system) params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; if (key_file) { @@ -365,7 +356,7 @@ static int attach_tcrypt(struct crypt_device *cd, return r; } - return crypt_activate_by_volume_key(cd, name, NULL, 0, flags);; + return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); } static int attach_luks_or_plain(struct crypt_device *cd, @@ -380,31 +371,31 @@ static int attach_luks_or_plain(struct crypt_device *cd, assert(name); assert(key_file || passwords); - if (!opt_type || streq(opt_type, CRYPT_LUKS1)) + if (!arg_type || streq(arg_type, CRYPT_LUKS1)) r = crypt_load(cd, CRYPT_LUKS1, NULL); - if ((!opt_type && r < 0) || streq_ptr(opt_type, CRYPT_PLAIN)) { + if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { struct crypt_params_plain params = {}; const char *cipher, *cipher_mode; _cleanup_free_ char *truncated_cipher = NULL; - if (opt_hash) { + if (arg_hash) { /* plain isn't a real hash type. it just means "use no hash" */ - if (!streq(opt_hash, "plain")) - params.hash = opt_hash; + if (!streq(arg_hash, "plain")) + params.hash = arg_hash; } else params.hash = "ripemd160"; - if (opt_cipher) { + if (arg_cipher) { size_t l; - l = strcspn(opt_cipher, "-"); - truncated_cipher = strndup(opt_cipher, l); + l = strcspn(arg_cipher, "-"); + truncated_cipher = strndup(arg_cipher, l); if (!truncated_cipher) return log_oom(); cipher = truncated_cipher; - cipher_mode = opt_cipher[l] ? opt_cipher+l+1 : "plain"; + cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; } else { cipher = "aes"; cipher_mode = "cbc-essiv:sha256"; @@ -413,7 +404,7 @@ static int attach_luks_or_plain(struct crypt_device *cd, /* for CRYPT_PLAIN limit reads * from keyfile to key length, and * ignore keyfile-size */ - opt_keyfile_size = opt_key_size / 8; + arg_keyfile_size = arg_key_size / 8; /* In contrast to what the name * crypt_setup() might suggest this @@ -422,7 +413,7 @@ static int attach_luks_or_plain(struct crypt_device *cd, * parameters when used for plain * mode. */ r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, - NULL, NULL, opt_keyfile_size, ¶ms); + NULL, NULL, arg_keyfile_size, ¶ms); /* hash == NULL implies the user passed "plain" */ pass_volume_key = (params.hash == NULL); @@ -440,9 +431,9 @@ static int attach_luks_or_plain(struct crypt_device *cd, crypt_get_device_name(cd)); if (key_file) { - r = crypt_activate_by_keyfile_offset(cd, name, CRYPT_ANY_SLOT, - key_file, opt_keyfile_size, - opt_keyfile_offset, flags); + r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, + key_file, arg_keyfile_size, + arg_keyfile_offset, flags); if (r < 0) { log_error("Failed to activate with key file '%s': %s", key_file, strerror(-r)); return -EAGAIN; @@ -452,9 +443,9 @@ static int attach_luks_or_plain(struct crypt_device *cd, STRV_FOREACH(p, passwords) { if (pass_volume_key) - r = crypt_activate_by_volume_key(cd, name, *p, opt_key_size, flags); + r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); else - r = crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, *p, strlen(*p), flags); + r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); if (r >= 0) break; @@ -565,18 +556,18 @@ int main(int argc, char *argv[]) { goto finish; } - if (opt_readonly) + if (arg_readonly) flags |= CRYPT_ACTIVATE_READONLY; - if (opt_discards) + if (arg_discards) flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; - if (opt_timeout > 0) - until = now(CLOCK_MONOTONIC) + opt_timeout; + if (arg_timeout > 0) + until = now(CLOCK_MONOTONIC) + arg_timeout; else until = 0; - opt_key_size = (opt_key_size > 0 ? opt_key_size : 256); + arg_key_size = (arg_key_size > 0 ? arg_key_size : 256); if (key_file) { struct stat st; @@ -587,18 +578,18 @@ int main(int argc, char *argv[]) { log_warning("Key file %s is world-readable. This is not a good idea!", key_file); } - for (tries = 0; opt_tries == 0 || tries < opt_tries; tries++) { + for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { _cleanup_strv_free_ char **passwords = NULL; if (!key_file) { - k = get_password(name, until, tries == 0 && !opt_verify, &passwords); + k = get_password(name, until, tries == 0 && !arg_verify, &passwords); if (k == -EAGAIN) continue; else if (k < 0) goto finish; } - if (streq_ptr(opt_type, CRYPT_TCRYPT)) + if (streq_ptr(arg_type, CRYPT_TCRYPT)) k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); else k = attach_luks_or_plain(cd, argv[2], key_file, passwords, flags); @@ -615,7 +606,7 @@ int main(int argc, char *argv[]) { log_warning("Invalid passphrase."); } - if (opt_tries != 0 && tries >= opt_tries) { + if (arg_tries != 0 && tries >= arg_tries) { log_error("Too many attempts; giving up."); r = EXIT_FAILURE; goto finish; @@ -650,9 +641,9 @@ finish: if (cd) crypt_free(cd); - free(opt_cipher); - free(opt_hash); - strv_free(opt_tcrypt_keyfiles); + free(arg_cipher); + free(arg_hash); + strv_free(arg_tcrypt_keyfiles); return r; }