diff options
Diffstat (limited to 'modules/pam_faillock/main.c')
| -rw-r--r-- | modules/pam_faillock/main.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/modules/pam_faillock/main.c b/modules/pam_faillock/main.c new file mode 100644 index 00000000..c5780166 --- /dev/null +++ b/modules/pam_faillock/main.c @@ -0,0 +1,232 @@ +/* + * Copyright (c) 2010 Tomas Mraz <tmraz@redhat.com> + * Copyright (c) 2010 Red Hat, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * ALTERNATIVELY, this product may be distributed under the terms of + * the GNU Public License, in which case the provisions of the GPL are + * required INSTEAD OF the above restrictions. (This clause is + * necessary due to a potential bad interaction between the GPL and + * the restrictions contained in a BSD-style copyright.) + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <dirent.h> +#include <errno.h> +#include <pwd.h> +#include <time.h> +#include <sys/types.h> +#include <unistd.h> +#ifdef HAVE_LIBAUDIT +#include <libaudit.h> + +#define AUDIT_NO_ID ((unsigned int) -1) +#endif + +#include "faillock.h" + +struct options { + unsigned int reset; + const char *dir; + const char *user; + const char *progname; +}; + +static int +args_parse(int argc, char **argv, struct options *opts) +{ + int i; + memset(opts, 0, sizeof(*opts)); + + opts->dir = FAILLOCK_DEFAULT_TALLYDIR; + opts->progname = argv[0]; + + for (i = 1; i < argc; ++i) { + + if (strcmp(argv[i], "--dir") == 0) { + ++i; + if (i >= argc || strlen(argv[i]) == 0) { + fprintf(stderr, "%s: No directory supplied.\n", argv[0]); + return -1; + } + opts->dir = argv[i]; + } + else if (strcmp(argv[i], "--user") == 0) { + ++i; + if (i >= argc || strlen(argv[i]) == 0) { + fprintf(stderr, "%s: No user name supplied.\n", argv[0]); + return -1; + } + opts->user = argv[i]; + } + else if (strcmp(argv[i], "--reset") == 0) { + opts->reset = 1; + } + else { + fprintf(stderr, "%s: Unknown option: %s\n", argv[0], argv[i]); + return -1; + } + } + return 0; +} + +static void +usage(const char *progname) +{ + fprintf(stderr, _("Usage: %s [--dir /path/to/tally-directory] [--user username] [--reset]\n"), + progname); +} + +static int +do_user(struct options *opts, const char *user) +{ + int fd; + int rv; + struct tally_data tallies; + struct passwd *pwd; + + pwd = getpwnam(user); + + fd = open_tally(opts->dir, user, pwd != NULL ? pwd->pw_uid : 0, 0); + + if (fd == -1) { + if (errno == ENOENT) { + return 0; + } + else { + fprintf(stderr, "%s: Error opening the tally file for %s:", + opts->progname, user); + perror(NULL); + return 3; + } + } + if (opts->reset) { +#ifdef HAVE_LIBAUDIT + int audit_fd; +#endif + + while ((rv=ftruncate(fd, 0)) == -1 && errno == EINTR); + if (rv == -1) { + fprintf(stderr, "%s: Error clearing the tally file for %s:", + opts->progname, user); + perror(NULL); +#ifdef HAVE_LIBAUDIT + } + if ((audit_fd=audit_open()) >= 0) { + audit_log_acct_message(audit_fd, AUDIT_USER_MGMT, NULL, + "faillock-reset", user, + pwd != NULL ? pwd->pw_uid : AUDIT_NO_ID, + NULL, NULL, NULL, rv == 0); + close(audit_fd); + } + if (rv == -1) { +#endif + close(fd); + return 4; + } + } + else { + unsigned int i; + + memset(&tallies, 0, sizeof(tallies)); + if ((rv=read_tally(fd, &tallies)) == -1) { + fprintf(stderr, "%s: Error reading the tally file for %s:", + opts->progname, user); + perror(NULL); + close(fd); + return 5; + } + + printf("%s:\n", user); + printf("%-19s %-5s %-48s %-5s\n", "When", "Type", "Source", "Valid"); + + for (i = 0; i < tallies.count; i++) { + struct tm *tm; + char timebuf[80]; + uint16_t status = tallies.records[i].status; + time_t when = tallies.records[i].time; + + tm = localtime(&when); + strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", tm); + printf("%-19s %-5s %-52.52s %s\n", timebuf, + status & TALLY_STATUS_RHOST ? "RHOST" : (status & TALLY_STATUS_TTY ? "TTY" : "SVC"), + tallies.records[i].source, status & TALLY_STATUS_VALID ? "V":"I"); + } + free(tallies.records); + } + close(fd); + return 0; +} + +static int +do_allusers(struct options *opts) +{ + struct dirent **userlist; + int rv, i; + + rv = scandir(opts->dir, &userlist, NULL, alphasort); + if (rv < 0) { + fprintf(stderr, "%s: Error reading tally directory: %m\n", opts->progname); + return 2; + } + + for (i = 0; i < rv; i++) { + if (userlist[i]->d_name[0] == '.') { + if ((userlist[i]->d_name[1] == '.' && userlist[i]->d_name[2] == '\0') || + userlist[i]->d_name[1] == '\0') + continue; + } + do_user(opts, userlist[i]->d_name); + free(userlist[i]); + } + free(userlist); + + return 0; +} + + +/*-----------------------------------------------------------------------*/ +int +main (int argc, char *argv[]) +{ + struct options opts; + + if (args_parse(argc, argv, &opts)) { + usage(argv[0]); + return 1; + } + + if (opts.user == NULL) { + return do_allusers(&opts); + } + + return do_user(&opts, opts.user); +} |