X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fjournal%2Fjournalctl.c;h=551cb311b54d9dda02e7e5494f78b24771aef349;hp=10959423f695d377426c09f33637c8b9a595482f;hb=feb12d3ed2c7f9132c64773c7c41b9e3a608a814;hpb=941e990db1f2682abaa2966b1c48602901d0c599 diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index 10959423f..551cb311b 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -30,6 +30,8 @@ #include #include #include +#include +#include #include @@ -41,6 +43,12 @@ #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_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE) static OutputMode arg_output = OUTPUT_SHORT; static bool arg_follow = false; @@ -48,35 +56,52 @@ 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_key = NULL; +#ifdef HAVE_GCRYPT +static usec_t arg_interval = DEFAULT_FSS_INTERVAL_USEC; +#endif + +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" - " -p --priority=RANGE Show only messages within the specified priority range\n" - " --header Show journal header information\n" - " --new-id128 Generate a new 128 Bit id\n", - program_invocation_short_name); + " -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" +#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-key=KEY Specify FSS verification key\n" +#endif + , program_invocation_short_name); return 0; } @@ -88,26 +113,34 @@ 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_INTERVAL, + ARG_VERIFY, + 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' }, - { 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; @@ -163,7 +196,7 @@ 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': @@ -183,8 +216,38 @@ static int parse_argv(int argc, char *argv[]) { break; case ARG_HEADER: - arg_print_header = true; + 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_KEY: + arg_action = ACTION_VERIFY; + arg_verify_key = optarg; + break; + + 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; @@ -305,7 +368,7 @@ 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; @@ -318,24 +381,25 @@ 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); - return log_oom(); - } - - 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); @@ -399,6 +463,216 @@ static int add_priorities(sd_journal *j) { 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, attr = 0; + sd_id128_t machine, boot; + char *p = NULL, *k = NULL; + struct FSSHeader h; + uint64_t n; + + 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 "/fss", + SD_ID128_FORMAT_VAL(machine)) < 0) + return log_oom(); + + if (access(p, F_OK) >= 0) { + log_error("Sealing key file %s exists already.", p); + r = -EEXIST; + goto finish; + } + + if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss.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 sealing key..."); + FSPRG_GenState0(state, mpk, seed, seed_size); + + assert(arg_interval > 0); + + n = now(CLOCK_REALTIME); + n /= arg_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; + } + + /* 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.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)) { + 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 " 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 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); + } + 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) arg_interval); + + if (isatty(STDOUT_FILENO)) { + char tsb[FORMAT_TIMESPAN_MAX]; + + fprintf(stderr, + ANSI_HIGHLIGHT_OFF "\n" + "The sealing key is automatically changed every %s.\n", + format_timespan(tsb, sizeof(tsb), arg_interval)); + } + + 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 sealing not available."); + return -ENOTSUP; +#endif +} + +static int verify(sd_journal *j) { + int r = 0; + Iterator i; + JournalFile *f; + + assert(j); + + HASHMAP_FOREACH(f, j->files, i) { + int k; + usec_t from, to, total; + +#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_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 = 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; +} + int main(int argc, char *argv[]) { int r; sd_journal *j = NULL; @@ -415,15 +689,15 @@ 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); @@ -435,12 +709,22 @@ 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;