X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fjournal%2Fjournalctl.c;h=25e441b0222075b327d06a12505079252ec072a2;hp=e9810c9a3d1cf7b9bb18af0a592fb5563d2ae83c;hb=56e81f7ca8276e40f8c88c4c30713a5b54009613;hpb=92a1fd9e95954a557d6fe27b56f5ef1b89fc2f5e diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index e9810c9a3..25e441b02 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -41,6 +41,12 @@ #include "logs-show.h" #include "strv.h" #include "journal-internal.h" +#include "journal-def.h" +#include "journal-verify.h" +#include "journal-authenticate.h" +#include "fsprg.h" + +#define DEFAULT_FSPRG_INTERVAL_USEC (15*USEC_PER_MINUTE) static OutputMode arg_output = OUTPUT_SHORT; static bool arg_follow = false; @@ -48,32 +54,45 @@ static bool arg_show_all = false; static bool arg_no_pager = false; static int arg_lines = -1; static bool arg_no_tail = false; -static bool arg_new_id128 = false; -static bool arg_print_header = false; static bool arg_quiet = false; static bool arg_local = 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 enum { + ACTION_SHOW, + ACTION_NEW_ID128, + ACTION_PRINT_HEADER, + ACTION_SETUP_KEYS, + ACTION_VERIFY +} arg_action = ACTION_SHOW; static int help(void) { printf("%s [OPTIONS...] [MATCH]\n\n" "Send control commands to or query the journal.\n\n" - " -h --help Show this help\n" - " --version Show package version\n" - " --no-pager Do not pipe output into a pager\n" - " -a --all Show all fields, including long and unprintable\n" - " -f --follow Follow journal\n" - " -n --lines=INTEGER Journal entries to show\n" - " --no-tail Show all lines, even in follow mode\n" - " -o --output=STRING Change journal output mode (short, short-monotonic,\n" - " verbose, export, json, cat)\n" - " -q --quiet Don't show privilege warning\n" - " -l --local Only local entries\n" - " -b --this-boot Show data only from current boot\n" - " -D --directory=PATH Show journal files from directory\n" - " --header Show journal header information\n" - " --new-id128 Generate a new 128 Bit id\n", + " -h --help Show this help\n" + " --version Show package version\n" + " --no-pager Do not pipe output into a pager\n" + " -a --all Show all fields, including long and unprintable\n" + " -f --follow Follow journal\n" + " -n --lines=INTEGER Journal entries to show\n" + " --no-tail Show all lines, even in follow mode\n" + " -o --output=STRING Change journal output mode (short, short-monotonic,\n" + " verbose, export, json, cat)\n" + " -q --quiet Don't show privilege warning\n" + " -l --local Only local entries\n" + " -b --this-boot Show data only from current boot\n" + " -D --directory=PATH Show journal files from directory\n" + " -p --priority=RANGE Show only messages within the specified priority range\n\n" + "Commands:\n" + " --new-id128 Generate a new 128 Bit ID\n" + " --header Show journal header information\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); return 0; @@ -86,25 +105,32 @@ static int parse_argv(int argc, char *argv[]) { ARG_NO_PAGER, ARG_NO_TAIL, ARG_NEW_ID128, - ARG_HEADER + ARG_HEADER, + ARG_SETUP_KEYS, + ARG_VERIFY, + ARG_VERIFY_SEED }; 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 }, - { 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 }, + { "verify", no_argument, NULL, ARG_VERIFY }, + { "verify-seed", required_argument, NULL, ARG_VERIFY_SEED }, + { NULL, 0, NULL, 0 } }; int c, r; @@ -112,7 +138,7 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 0); assert(argv); - while ((c = getopt_long(argc, argv, "hfo:an:qlbD:", options, NULL)) >= 0) { + while ((c = getopt_long(argc, argv, "hfo:an:qlbD:p:", options, NULL)) >= 0) { switch (c) { @@ -160,7 +186,7 @@ static int parse_argv(int argc, char *argv[]) { break; case ARG_NEW_ID128: - arg_new_id128 = true; + arg_action = ACTION_NEW_ID128; break; case 'q': @@ -180,8 +206,71 @@ static int parse_argv(int argc, char *argv[]) { break; case ARG_HEADER: - arg_print_header = true; + arg_action = ACTION_PRINT_HEADER; + break; + + case ARG_SETUP_KEYS: + arg_action = ACTION_SETUP_KEYS; + break; + + case ARG_VERIFY: + arg_action = ACTION_VERIFY; + break; + + case ARG_VERIFY_SEED: + arg_action = ACTION_VERIFY; + arg_verify_seed = optarg; + break; + + case 'p': { + const char *dots; + + dots = strstr(optarg, ".."); + if (dots) { + char *a; + int from, to, i; + + /* a range */ + a = strndup(optarg, dots - optarg); + if (!a) + return log_oom(); + + from = log_level_from_string(a); + to = log_level_from_string(dots + 2); + free(a); + + if (from < 0 || to < 0) { + log_error("Failed to parse log level range %s", optarg); + return -EINVAL; + } + + arg_priorities = 0; + + if (from < to) { + for (i = from; i <= to; i++) + arg_priorities |= 1 << i; + } else { + for (i = to; i <= from; i++) + arg_priorities |= 1 << i; + } + + } else { + int p, i; + + p = log_level_from_string(optarg); + if (p < 0) { + log_error("Unknown log level %s", optarg); + return -EINVAL; + } + + arg_priorities = 0; + + for (i = 0; i <= p; i++) + arg_priorities |= 1 << i; + } + break; + } case '?': return -EINVAL; @@ -198,6 +287,21 @@ static int parse_argv(int argc, char *argv[]) { return 1; } +static bool on_tty(void) { + static int t = -1; + + /* Note that this is invoked relatively early, before we start + * the pager. That means the value we return reflects whether + * we originally were started on a tty, not if we currently + * are. But this is intended, since we want colour and so on + * when run in our own pager. */ + + if (_unlikely_(t < 0)) + t = isatty(STDOUT_FILENO) > 0; + + return t; +} + static int generate_new_id128(void) { sd_id128_t id; int r; @@ -237,7 +341,7 @@ static int add_matches(sd_journal *j, char **args) { if (streq(*i, "+")) r = sd_journal_add_disjunction(j); else if (path_is_absolute(*i)) { - char *p; + char *p, *t = NULL; const char *path; struct stat st; @@ -250,25 +354,25 @@ static int add_matches(sd_journal *j, char **args) { return -errno; } - if (S_ISREG(st.st_mode) && (0111 & st.st_mode)) { - char *t; - + if (S_ISREG(st.st_mode) && (0111 & st.st_mode)) t = strappend("_EXE=", path); - if (!t) { - free(p); - log_error("Out of memory"); - return -ENOMEM; - } - - r = sd_journal_add_match(j, t, 0); - free(t); - } else { + else if (S_ISCHR(st.st_mode)) + asprintf(&t, "_KERNEL_DEVICE=c%u:%u", major(st.st_rdev), minor(st.st_rdev)); + else if (S_ISBLK(st.st_mode)) + asprintf(&t, "_KERNEL_DEVICE=b%u:%u", major(st.st_rdev), minor(st.st_rdev)); + else { free(p); - log_error("File is not a regular file or is not executable: %s", *i); + log_error("File is not a device node, regular file or is not executable: %s", *i); return -EINVAL; } free(p); + + if (!t) + return log_oom(); + + r = sd_journal_add_match(j, t, 0); + free(t); } else r = sd_journal_add_match(j, *i, 0); @@ -286,6 +390,8 @@ static int add_this_boot(sd_journal *j) { sd_id128_t boot_id; int r; + assert(j); + if (!arg_this_boot) return 0; @@ -305,6 +411,215 @@ static int add_this_boot(sd_journal *j) { return 0; } +static int add_priorities(sd_journal *j) { + char match[] = "PRIORITY=0"; + int i, r; + + assert(j); + + if (arg_priorities == 0xFF) + return 0; + + for (i = LOG_EMERG; i <= LOG_DEBUG; i++) + if (arg_priorities & (1 << i)) { + match[sizeof(match)-2] = '0' + i; + + log_info("adding match %s", match); + + r = sd_journal_add_match(j, match, strlen(match)); + if (r < 0) { + log_error("Failed to add match: %s", strerror(-r)); + return r; + } + } + + return 0; +} + +static int setup_keys(void) { +#ifdef HAVE_GCRYPT + size_t mpk_size, seed_size, state_size, i; + uint8_t *mpk, *seed, *state; + ssize_t l; + int fd = -1, r; + sd_id128_t machine, boot; + char *p = NULL, *k = NULL; + struct FSPRGHeader h; + uint64_t n, interval; + + r = sd_id128_get_machine(&machine); + if (r < 0) { + log_error("Failed to get machine ID: %s", strerror(-r)); + return r; + } + + r = sd_id128_get_boot(&boot); + if (r < 0) { + log_error("Failed to get boot ID: %s", strerror(-r)); + return r; + } + + if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fsprg", + SD_ID128_FORMAT_VAL(machine)) < 0) + return log_oom(); + + if (access(p, F_OK) >= 0) { + log_error("Evolving key file %s exists already.", p); + r = -EEXIST; + goto finish; + } + + if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fsprg.tmp.XXXXXX", + SD_ID128_FORMAT_VAL(machine)) < 0) { + r = log_oom(); + goto finish; + } + + mpk_size = FSPRG_mskinbytes(FSPRG_RECOMMENDED_SECPAR); + mpk = alloca(mpk_size); + + seed_size = FSPRG_RECOMMENDED_SEEDLEN; + seed = alloca(seed_size); + + state_size = FSPRG_stateinbytes(FSPRG_RECOMMENDED_SECPAR); + state = alloca(state_size); + + fd = open("/dev/random", O_RDONLY|O_CLOEXEC|O_NOCTTY); + if (fd < 0) { + log_error("Failed to open /dev/random: %m"); + r = -errno; + goto finish; + } + + log_info("Generating seed..."); + l = loop_read(fd, seed, seed_size, true); + if (l < 0 || (size_t) l != seed_size) { + log_error("Failed to read random seed: %s", strerror(EIO)); + r = -EIO; + goto finish; + } + + log_info("Generating key pair..."); + FSPRG_GenMK(NULL, mpk, seed, seed_size, FSPRG_RECOMMENDED_SECPAR); + + log_info("Generating evolving key..."); + FSPRG_GenState0(state, mpk, seed, seed_size); + + interval = DEFAULT_FSPRG_INTERVAL_USEC; + n = now(CLOCK_REALTIME); + n /= interval; + + close_nointr_nofail(fd); + fd = mkostemp(k, O_WRONLY|O_CLOEXEC|O_NOCTTY); + if (fd < 0) { + log_error("Failed to open %s: %m", k); + r = -errno; + goto finish; + } + + 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); + + l = loop_write(fd, &h, sizeof(h), false); + if (l < 0 || (size_t) l != sizeof(h)) { + log_error("Failed to write header: %s", strerror(EIO)); + r = -EIO; + goto finish; + } + + l = loop_write(fd, state, state_size, false); + if (l < 0 || (size_t) l != state_size) { + log_error("Failed to write state: %s", strerror(EIO)); + r = -EIO; + goto finish; + } + + if (link(k, p) < 0) { + log_error("Failed to link file: %m"); + r = -errno; + goto finish; + } + + 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" + "\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" + "\n\t" ANSI_HIGHLIGHT_RED_ON, p); + fflush(stderr); + } + for (i = 0; i < seed_size; i++) { + if (i > 0 && i % 3 == 0) + putchar('-'); + printf("%02x", ((uint8_t*) seed)[i]); + } + + printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) interval); + + if (isatty(STDOUT_FILENO)) + fputs(ANSI_HIGHLIGHT_OFF "\n", stderr); + + r = 0; + +finish: + if (fd >= 0) + close_nointr_nofail(fd); + + if (k) { + unlink(k); + free(k); + } + + free(p); + + return r; +#else + log_error("Forward-secure journal verification not available."); +#endif +} + +static int verify(sd_journal *j) { + int r = 0; + Iterator i; + JournalFile *f; + + assert(j); + + HASHMAP_FOREACH(f, j->files, i) { + int k; + +#ifdef HAVE_GCRYPT + 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); +#endif + + k = journal_file_verify(f, arg_verify_seed); + if (k == -EINVAL) { + /* If the seed was invalid give up right-away. */ + return k; + } else if (k < 0) { + log_warning("FAIL: %s (%s)", f->path, strerror(-k)); + r = k; + } else + log_info("PASS: %s", f->path); + } + + return r; +} + int main(int argc, char *argv[]) { int r; sd_journal *j = NULL; @@ -321,15 +636,15 @@ int main(int argc, char *argv[]) { if (r <= 0) goto finish; - if (arg_new_id128) { + if (arg_action == ACTION_NEW_ID128) { r = generate_new_id128(); goto finish; } -#ifdef HAVE_ACL - if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0) - log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off."); -#endif + if (arg_action == ACTION_SETUP_KEYS) { + r = setup_keys(); + goto finish; + } if (arg_directory) r = sd_journal_open_directory(&j, arg_directory, 0); @@ -341,12 +656,22 @@ int main(int argc, char *argv[]) { goto finish; } - if (arg_print_header) { + if (arg_action == ACTION_VERIFY) { + r = verify(j); + goto finish; + } + + if (arg_action == ACTION_PRINT_HEADER) { journal_print_header(j); r = 0; goto finish; } +#ifdef HAVE_ACL + if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0) + log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off."); +#endif + r = add_this_boot(j); if (r < 0) goto finish; @@ -355,6 +680,10 @@ int main(int argc, char *argv[]) { if (r < 0) goto finish; + r = add_priorities(j); + if (r < 0) + goto finish; + if (!arg_quiet) { usec_t start, end; char start_buf[FORMAT_TIMESTAMP_MAX], end_buf[FORMAT_TIMESTAMP_MAX]; @@ -398,11 +727,8 @@ int main(int argc, char *argv[]) { goto finish; } - have_pager = !arg_no_pager && !arg_follow; - if (have_pager) { - columns(); - pager_open(); - } + on_tty(); + have_pager = !arg_no_pager && !arg_follow && pager_open(); if (arg_output == OUTPUT_JSON) { fputc('[', stdout); @@ -412,8 +738,10 @@ int main(int argc, char *argv[]) { for (;;) { for (;;) { sd_id128_t boot_id; - int flags = (arg_show_all*OUTPUT_SHOW_ALL | - have_pager*OUTPUT_FULL_WIDTH); + int flags = + arg_show_all * OUTPUT_SHOW_ALL | + have_pager * OUTPUT_FULL_WIDTH | + on_tty() * OUTPUT_COLOR; if (need_seek) { r = sd_journal_next(j);