diff options
Diffstat (limited to 'plugins/sudoers/regress/iolog_plugin/check_iolog_plugin.c')
| -rw-r--r-- | plugins/sudoers/regress/iolog_plugin/check_iolog_plugin.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/plugins/sudoers/regress/iolog_plugin/check_iolog_plugin.c b/plugins/sudoers/regress/iolog_plugin/check_iolog_plugin.c new file mode 100644 index 0000000..e4cc141 --- /dev/null +++ b/plugins/sudoers/regress/iolog_plugin/check_iolog_plugin.c @@ -0,0 +1,432 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2018-2020 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <pwd.h> +#include <unistd.h> + +#define SUDO_ERROR_WRAP 0 + +#include "sudoers.h" +#include "sudo_eventlog.h" +#include "sudo_iolog.h" +#include "sudo_plugin.h" + +#include <def_data.c> /* for iolog_path.c */ + +extern struct io_plugin sudoers_io; + +struct sudo_user sudo_user; +struct passwd *list_pw; +sudo_printf_t sudo_printf; +sudo_conv_t sudo_conv; +struct sudo_plugin_event * (*plugin_event_alloc)(void); + +sudo_dso_public int main(int argc, char *argv[], char *envp[]); + +static void +usage(void) +{ + fprintf(stderr, "usage: %s pathname\n", getprogname()); + exit(EXIT_FAILURE); +} + +static int +sudo_printf_int(int msg_type, const char *fmt, ...) +{ + va_list ap; + int len; + + switch (msg_type) { + case SUDO_CONV_INFO_MSG: + va_start(ap, fmt); + len = vfprintf(stdout, fmt, ap); + va_end(ap); + break; + case SUDO_CONV_ERROR_MSG: + va_start(ap, fmt); + len = vfprintf(stderr, fmt, ap); + va_end(ap); + break; + default: + len = -1; + errno = EINVAL; + break; + } + + return len; +} + +static bool +validate_iolog_info(const char *log_dir, bool legacy) +{ + struct eventlog *evlog; + time_t now; + + time(&now); + + /* Parse log file. */ + if ((evlog = iolog_parse_loginfo(-1, log_dir)) == NULL) + return false; + + if (evlog->cwd == NULL || strcmp(evlog->cwd, "/") != 0) { + sudo_warnx("bad cwd: want \"/\", got \"%s\"", + evlog->cwd ? evlog->cwd : "NULL"); + return false; + } + + /* No host in the legacy log file. */ + if (!legacy) { + if (evlog->submithost == NULL || strcmp(evlog->submithost, "localhost") != 0) { + sudo_warnx("bad host: want \"localhost\", got \"%s\"", + evlog->submithost ? evlog->submithost : "NULL"); + return false; + } + } + + if (evlog->submituser == NULL || strcmp(evlog->submituser, "nobody") != 0) { + sudo_warnx("bad user: want \"nobody\" got \"%s\"", + evlog->submituser ? evlog->submituser : "NULL"); + return false; + } + + if (evlog->runuser == NULL || strcmp(evlog->runuser, "root") != 0) { + sudo_warnx("bad runuser: want \"root\" got \"%s\"", + evlog->runuser ? evlog->runuser : "NULL"); + return false; + } + + /* No runas group specified, should be NULL. */ + if (evlog->rungroup != NULL) { + sudo_warnx("bad rungroup: want \"\" got \"%s\"", evlog->rungroup); + return false; + } + + if (evlog->ttyname == NULL || strcmp(evlog->ttyname, "/dev/console") != 0) { + sudo_warnx("bad tty: want \"/dev/console\" got \"%s\"", + evlog->ttyname ? evlog->ttyname : "NULL"); + return false; + } + + if (evlog->command == NULL || strcmp(evlog->command, "/usr/bin/id") != 0) { + sudo_warnx("bad command: want \"/usr/bin/id\" got \"%s\"", + evlog->command ? evlog->command : "NULL"); + return false; + } + + if (evlog->lines != 24) { + sudo_warnx("bad lines: want 24 got %d", evlog->lines); + return false; + } + + if (evlog->columns != 80) { + sudo_warnx("bad columns: want 80 got %d", evlog->columns); + return false; + } + + if (evlog->submit_time.tv_sec < now - 10 || evlog->submit_time.tv_sec > now + 10) { + sudo_warnx("bad submit_time: want %lld got %lld", (long long)now, + (long long)evlog->submit_time.tv_sec); + return false; + } + + eventlog_free(evlog); + + return true; +} + +static bool +validate_timing(FILE *fp, int recno, int type, unsigned int p1, unsigned int p2) +{ + struct timing_closure timing; + char buf[LINE_MAX]; + + if (!fgets(buf, sizeof(buf), fp)) { + sudo_warn("unable to read timing file"); + return false; + } + buf[strcspn(buf, "\n")] = '\0'; + if (!iolog_parse_timing(buf, &timing)) { + sudo_warnx("invalid timing file line: %s", buf); + return false; + } + if (timing.event != type) { + sudo_warnx("record %d: want type %d, got type %d", recno, type, + timing.event); + return false; + } + if (type == IO_EVENT_WINSIZE) { + if (timing.u.winsize.lines != (int)p1) { + sudo_warnx("record %d: want %u lines, got %u", recno, p1, + timing.u.winsize.lines); + return false; + } + if (timing.u.winsize.cols != (int)p2) { + sudo_warnx("record %d: want %u cols, got %u", recno, p2, + timing.u.winsize.cols); + return false; + } + } else { + if (timing.u.nbytes != p1) { + sudo_warnx("record %d: want len %u, got type %zu", recno, p1, + timing.u.nbytes); + return false; + } + } + if (timing.delay.tv_sec != 0) { + sudo_warnx("record %d: got excessive delay %lld.%09ld", recno, + (long long)timing.delay.tv_sec, timing.delay.tv_nsec); + return false; + } + + return true; +} + + +/* + * Test sudoers I/O log plugin endpoints. + */ +static void +test_endpoints(int *ntests, int *nerrors, const char *iolog_dir, char *envp[]) +{ + int rc, cmnd_argc = 1; + const char *errstr = NULL; + char buf[1024], iolog_path[PATH_MAX]; + char runas_gid[64], runas_uid[64]; + FILE *fp; + const char *cmnd_argv[] = { + "/usr/bin/id", + NULL + }; + const char *user_info[] = { + "cols=80", + "lines=24", + "cwd=/", + "host=localhost", + "tty=/dev/console", + "user=nobody", + NULL + }; + const char *command_info[] = { + "command=/usr/bin/id", + iolog_path, + "iolog_stdin=true", + "iolog_stdout=true", + "iolog_stderr=true", + "iolog_ttyin=true", + "iolog_ttyout=true", + "iolog_compress=false", + "iolog_mode=0644", + runas_gid, + runas_uid, + NULL + }; + char *settings[] = { + NULL + }; + const char output[] = "uid=0(root) gid=0(wheel)\r\n"; + + /* Set runas uid/gid to root. */ + snprintf(runas_uid, sizeof(runas_uid), "runas_uid=%u", + (unsigned int)runas_pw->pw_uid); + snprintf(runas_gid, sizeof(runas_gid), "runas_gid=%u", + (unsigned int)runas_pw->pw_gid); + + /* Set path to the iolog directory the user passed in. */ + snprintf(iolog_path, sizeof(iolog_path), "iolog_path=%s", iolog_dir); + + /* Test open endpoint. */ + rc = sudoers_io.open(SUDO_API_VERSION, NULL, sudo_printf_int, settings, + (char **)user_info, (char **)command_info, cmnd_argc, + (char **)cmnd_argv, envp, NULL, &errstr); + (*ntests)++; + if (rc != 1) { + sudo_warnx("I/O log open endpoint failed"); + (*nerrors)++; + return; + } + + /* Test log_ttyout endpoint. */ + rc = sudoers_io.log_ttyout(output, strlen(output), &errstr); + (*ntests)++; + if (rc != 1) { + sudo_warnx("I/O log_ttyout endpoint failed"); + (*nerrors)++; + return; + } + + /* Test change_winsize endpoint (twice). */ + rc = sudoers_io.change_winsize(32, 128, &errstr); + (*ntests)++; + if (rc != 1) { + sudo_warnx("I/O change_winsize endpoint failed"); + (*nerrors)++; + return; + } + rc = sudoers_io.change_winsize(24, 80, &errstr); + (*ntests)++; + if (rc != 1) { + sudo_warnx("I/O change_winsize endpoint failed"); + (*nerrors)++; + return; + } + + /* Close the plugin. */ + sudoers_io.close(0, 0); + + /* Validate I/O log info file (json). */ + (*ntests)++; + if (!validate_iolog_info(iolog_dir, false)) + (*nerrors)++; + + /* Validate I/O log info file (legacy). */ + snprintf(iolog_path, sizeof(iolog_path), "%s/log.json", iolog_dir); + unlink(iolog_path); + (*ntests)++; + if (!validate_iolog_info(iolog_dir, true)) + (*nerrors)++; + + /* Validate the timing file. */ + snprintf(iolog_path, sizeof(iolog_path), "%s/timing", iolog_dir); + (*ntests)++; + if ((fp = fopen(iolog_path, "r")) == NULL) { + sudo_warn("unable to open %s", iolog_path); + (*nerrors)++; + return; + } + + /* Line 1: output of id command. */ + if (!validate_timing(fp, 1, IO_EVENT_TTYOUT, strlen(output), 0)) { + (*nerrors)++; + return; + } + + /* Line 2: window size change. */ + if (!validate_timing(fp, 2, IO_EVENT_WINSIZE, 32, 128)) { + (*nerrors)++; + return; + } + + /* Line 3: window size change. */ + if (!validate_timing(fp, 3, IO_EVENT_WINSIZE, 24, 80)) { + (*nerrors)++; + return; + } + + /* Validate ttyout log file. */ + snprintf(iolog_path, sizeof(iolog_path), "%s/ttyout", iolog_dir); + (*ntests)++; + fclose(fp); + if ((fp = fopen(iolog_path, "r")) == NULL) { + sudo_warn("unable to open %s", iolog_path); + (*nerrors)++; + return; + } + if (!fgets(buf, sizeof(buf), fp)) { + sudo_warn("unable to read %s", iolog_path); + (*nerrors)++; + return; + } + if (strcmp(buf, output) != 0) { + sudo_warnx("ttylog mismatch: want \"%s\", got \"%s\"", output, buf); + (*nerrors)++; + return; + } +} + +int +main(int argc, char *argv[], char *envp[]) +{ + struct passwd *tpw; + int tests = 0, errors = 0; + const char *iolog_dir; + + initprogname(argc > 0 ? argv[0] : "check_iolog_plugin"); + + if (argc != 2) + usage(); + iolog_dir = argv[1]; + + /* Set runas user. */ + if ((tpw = getpwuid(0)) == NULL) { + if ((tpw = getpwnam("root")) == NULL) + sudo_fatalx("unable to look up uid 0 or root"); + } + sudo_user._runas_pw = pw_dup(tpw); + + /* Set invoking user. */ + if ((tpw = getpwuid(geteuid())) == NULL) + sudo_fatalx("unable to look up invoking user's uid"); + sudo_user.pw = pw_dup(tpw); + + /* Set iolog uid/gid to invoking user. */ + iolog_set_owner(sudo_user.pw->pw_uid, sudo_user.pw->pw_gid); + + test_endpoints(&tests, &errors, iolog_dir, envp); + + if (tests != 0) { + printf("check_iolog_plugin: %d test%s run, %d errors, %d%% success rate\n", + tests, tests == 1 ? "" : "s", errors, + (tests - errors) * 100 / tests); + } + + exit(errors); +} + +/* Stub functions */ + +bool +set_perms(int perm) +{ + return true; +} + +bool +restore_perms(void) +{ + return true; +} + +bool +log_warning(int flags, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + sudo_vwarn_nodebug(fmt, ap); + va_end(ap); + + return true; +} + +bool +log_warningx(int flags, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + sudo_vwarnx_nodebug(fmt, ap); + va_end(ap); + + return true; +} |