#include <time.h>
#include <getopt.h>
#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <linux/fs.h>
#include <systemd/sd-journal.h>
#include "journal-def.h"
#include "journal-verify.h"
#include "journal-authenticate.h"
+#include "journal-qrcode.h"
#include "fsprg.h"
-#define DEFAULT_FSPRG_INTERVAL_USEC (15*USEC_PER_MINUTE)
+#define DEFAULT_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE)
static OutputMode arg_output = OUTPUT_SHORT;
static bool arg_follow = false;
static bool arg_this_boot = false;
static const char *arg_directory = NULL;
static int arg_priorities = 0xFF;
-static const char *arg_verify_seed = NULL;
+static const char *arg_verify_key = NULL;
+#ifdef HAVE_GCRYPT
+static usec_t arg_interval = DEFAULT_FSS_INTERVAL_USEC;
+#endif
static enum {
ACTION_SHOW,
"Commands:\n"
" --new-id128 Generate a new 128 Bit ID\n"
" --header Show journal header information\n"
+#ifdef HAVE_GCRYPT
+ " --setup-keys Generate new FSS key pair\n"
+ " --interval=TIME Time interval for changing the FSS sealing key\n"
" --verify Verify journal file consistency\n"
- " --verify-seed=SEED Specify FSPRG seed for verification\n"
- " --setup-keys Generate new FSPRG key and seed\n",
- program_invocation_short_name);
+ " --verify-key=KEY Specify FSS verification key\n"
+#endif
+ , program_invocation_short_name);
return 0;
}
ARG_NEW_ID128,
ARG_HEADER,
ARG_SETUP_KEYS,
+ ARG_INTERVAL,
ARG_VERIFY,
- ARG_VERIFY_SEED
+ ARG_VERIFY_KEY
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version" , no_argument, NULL, ARG_VERSION },
- { "no-pager", no_argument, NULL, ARG_NO_PAGER },
- { "follow", no_argument, NULL, 'f' },
- { "output", required_argument, NULL, 'o' },
- { "all", no_argument, NULL, 'a' },
- { "lines", required_argument, NULL, 'n' },
- { "no-tail", no_argument, NULL, ARG_NO_TAIL },
- { "new-id128", no_argument, NULL, ARG_NEW_ID128 },
- { "quiet", no_argument, NULL, 'q' },
- { "local", no_argument, NULL, 'l' },
- { "this-boot", no_argument, NULL, 'b' },
- { "directory", required_argument, NULL, 'D' },
- { "header", no_argument, NULL, ARG_HEADER },
- { "priority", no_argument, NULL, 'p' },
- { "setup-keys", no_argument, NULL, ARG_SETUP_KEYS },
- { "verify", no_argument, NULL, ARG_VERIFY },
- { "verify-seed", required_argument, NULL, ARG_VERIFY_SEED },
- { NULL, 0, NULL, 0 }
+ { "help", no_argument, NULL, 'h' },
+ { "version" , no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "follow", no_argument, NULL, 'f' },
+ { "output", required_argument, NULL, 'o' },
+ { "all", no_argument, NULL, 'a' },
+ { "lines", required_argument, NULL, 'n' },
+ { "no-tail", no_argument, NULL, ARG_NO_TAIL },
+ { "new-id128", no_argument, NULL, ARG_NEW_ID128 },
+ { "quiet", no_argument, NULL, 'q' },
+ { "local", no_argument, NULL, 'l' },
+ { "this-boot", no_argument, NULL, 'b' },
+ { "directory", required_argument, NULL, 'D' },
+ { "header", no_argument, NULL, ARG_HEADER },
+ { "priority", no_argument, NULL, 'p' },
+ { "setup-keys", no_argument, NULL, ARG_SETUP_KEYS },
+ { "interval", required_argument, NULL, ARG_INTERVAL },
+ { "verify", no_argument, NULL, ARG_VERIFY },
+ { "verify-key", required_argument, NULL, ARG_VERIFY_KEY },
+ { NULL, 0, NULL, 0 }
};
int c, r;
arg_action = ACTION_PRINT_HEADER;
break;
+ case ARG_VERIFY:
+ arg_action = ACTION_VERIFY;
+ break;
+
+#ifdef HAVE_GCRYPT
case ARG_SETUP_KEYS:
arg_action = ACTION_SETUP_KEYS;
break;
- case ARG_VERIFY:
+
+ case ARG_VERIFY_KEY:
arg_action = ACTION_VERIFY;
+ arg_verify_key = optarg;
break;
- case ARG_VERIFY_SEED:
- arg_action = ACTION_VERIFY;
- arg_verify_seed = optarg;
+ case ARG_INTERVAL:
+ r = parse_usec(optarg, &arg_interval);
+ if (r < 0 || arg_interval <= 0) {
+ log_error("Failed to parse sealing key change interval: %s", optarg);
+ return -EINVAL;
+ }
break;
+#else
+ case ARG_SETUP_KEYS:
+ case ARG_VERIFY_KEY:
+ case ARG_INTERVAL:
+ log_error("Forward-secure sealing not available.");
+ return -ENOTSUP;
+#endif
case 'p': {
const char *dots;
size_t mpk_size, seed_size, state_size, i;
uint8_t *mpk, *seed, *state;
ssize_t l;
- int fd = -1, r;
+ int fd = -1, r, attr = 0;
sd_id128_t machine, boot;
char *p = NULL, *k = NULL;
- struct FSPRGHeader h;
- uint64_t n, interval;
+ struct FSSHeader h;
+ uint64_t n;
r = sd_id128_get_machine(&machine);
if (r < 0) {
return r;
}
- if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fsprg",
+ if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss",
SD_ID128_FORMAT_VAL(machine)) < 0)
return log_oom();
if (access(p, F_OK) >= 0) {
- log_error("Evolving key file %s exists already.", p);
+ log_error("Sealing key file %s exists already.", p);
r = -EEXIST;
goto finish;
}
- if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fsprg.tmp.XXXXXX",
+ if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss.tmp.XXXXXX",
SD_ID128_FORMAT_VAL(machine)) < 0) {
r = log_oom();
goto finish;
log_info("Generating key pair...");
FSPRG_GenMK(NULL, mpk, seed, seed_size, FSPRG_RECOMMENDED_SECPAR);
- log_info("Generating evolving key...");
+ log_info("Generating sealing key...");
FSPRG_GenState0(state, mpk, seed, seed_size);
- interval = DEFAULT_FSPRG_INTERVAL_USEC;
+ assert(arg_interval > 0);
+
n = now(CLOCK_REALTIME);
- n /= interval;
+ n /= arg_interval;
close_nointr_nofail(fd);
fd = mkostemp(k, O_WRONLY|O_CLOEXEC|O_NOCTTY);
goto finish;
}
+ /* Enable secure remove, exclusion from dump, synchronous
+ * writing and in-place updating */
+ if (ioctl(fd, FS_IOC_GETFLAGS, &attr) < 0)
+ log_warning("FS_IOC_GETFLAGS failed: %m");
+
+ attr |= FS_SECRM_FL|FS_NODUMP_FL|FS_SYNC_FL|FS_NOCOW_FL;
+
+ if (ioctl(fd, FS_IOC_SETFLAGS, &attr) < 0)
+ log_warning("FS_IOC_SETFLAGS failed: %m");
+
zero(h);
memcpy(h.signature, "KSHHRHLP", 8);
h.machine_id = machine;
h.boot_id = boot;
h.header_size = htole64(sizeof(h));
- h.fsprg_start_usec = htole64(n * interval);
- h.fsprg_interval_usec = htole64(interval);
- h.secpar = htole16(FSPRG_RECOMMENDED_SECPAR);
- h.state_size = htole64(state_size);
+ h.start_usec = htole64(n * arg_interval);
+ h.interval_usec = htole64(arg_interval);
+ h.fsprg_secpar = htole16(FSPRG_RECOMMENDED_SECPAR);
+ h.fsprg_state_size = htole64(state_size);
l = loop_write(fd, &h, sizeof(h), false);
if (l < 0 || (size_t) l != sizeof(h)) {
if (isatty(STDOUT_FILENO)) {
fprintf(stderr,
"\n"
- "The new key pair has been generated. The evolving key has been written to the\n"
- "following file. It will be used to protect local journal files. This file\n"
- "should be kept secret. It should not be used on multiple hosts.\n"
+ "The new key pair has been generated. The " ANSI_HIGHLIGHT_ON "secret sealing key" ANSI_HIGHLIGHT_OFF " has been written to\n"
+ "the following local file. It should not be used on multiple hosts.\n"
"\n"
"\t%s\n"
"\n"
- "Please write down the following " ANSI_HIGHLIGHT_ON "secret" ANSI_HIGHLIGHT_OFF " seed value. It should not be stored\n"
- "locally on disk, and may be used to verify journal files from this host.\n"
+ "Please write down the following " ANSI_HIGHLIGHT_ON "secret verification key" ANSI_HIGHLIGHT_OFF ". It should be stored\n"
+ "at a safe location and should not be saved locally on disk.\n"
"\n\t" ANSI_HIGHLIGHT_RED_ON, p);
fflush(stderr);
}
printf("%02x", ((uint8_t*) seed)[i]);
}
- printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) interval);
+ printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) arg_interval);
+
+ if (isatty(STDOUT_FILENO)) {
+ char tsb[FORMAT_TIMESPAN_MAX], *hn;
- if (isatty(STDOUT_FILENO))
- fputs(ANSI_HIGHLIGHT_OFF "\n", stderr);
+ fprintf(stderr,
+ ANSI_HIGHLIGHT_OFF "\n"
+ "The sealing key is automatically changed every %s.\n",
+ format_timespan(tsb, sizeof(tsb), arg_interval));
+
+ hn = gethostname_malloc();
+
+ if (hn) {
+ hostname_cleanup(hn);
+ fprintf(stderr, "The keys have been generated for host %s (" SD_ID128_FORMAT_STR ").\n", hn, SD_ID128_FORMAT_VAL(machine));
+ } else
+ fprintf(stderr, "The keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
+
+#ifdef HAVE_QRENCODE
+ fputc('\n', stderr);
+ print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
+#endif
+ free(hn);
+ }
r = 0;
return r;
#else
- log_error("Forward-secure journal verification not available.");
+ log_error("Forward-secure sealing not available.");
+ return -ENOTSUP;
#endif
}
HASHMAP_FOREACH(f, j->files, i) {
int k;
+ usec_t from, to, total;
- if (!arg_verify_seed && journal_file_fsprg_enabled(f))
- log_warning("Journal file %s has authentication enabled but verification seed has not been passed using --verify-seed=.", f->path);
+#ifdef HAVE_GCRYPT
+ if (!arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
+ log_warning("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
+#endif
- k = journal_file_verify(f, arg_verify_seed);
- if (k < 0) {
+ k = journal_file_verify(f, arg_verify_key, &from, &to, &total, true);
+ if (k == -EINVAL) {
+ /* If the key was invalid give up right-away. */
+ return k;
+ } else if (k < 0) {
log_warning("FAIL: %s (%s)", f->path, strerror(-k));
- r = -r;
- } else
+ r = k;
+ } else {
+ char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX], c[FORMAT_TIMESPAN_MAX];
log_info("PASS: %s", f->path);
+
+ if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
+ log_info("=> Validated from %s to %s, %s missing",
+ format_timestamp(a, sizeof(a), from),
+ format_timestamp(b, sizeof(b), to),
+ format_timespan(c, sizeof(c), total > to ? total - to : 0));
+ }
}
return r;
~ianmdlvl / elogind.git / blobdiff