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Diffstat (limited to 'modules/pam_faillock/pam_faillock.c')
-rw-r--r--modules/pam_faillock/pam_faillock.c240
1 files changed, 13 insertions, 227 deletions
diff --git a/modules/pam_faillock/pam_faillock.c b/modules/pam_faillock/pam_faillock.c
index 8328fbae..ca1c7035 100644
--- a/modules/pam_faillock/pam_faillock.c
+++ b/modules/pam_faillock/pam_faillock.c
@@ -38,7 +38,6 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
-#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
@@ -56,55 +55,12 @@
#include "pam_inline.h"
#include "faillock.h"
+#include "faillock_config.h"
#define FAILLOCK_ACTION_PREAUTH 0
#define FAILLOCK_ACTION_AUTHSUCC 1
#define FAILLOCK_ACTION_AUTHFAIL 2
-#define FAILLOCK_FLAG_DENY_ROOT 0x1
-#define FAILLOCK_FLAG_AUDIT 0x2
-#define FAILLOCK_FLAG_SILENT 0x4
-#define FAILLOCK_FLAG_NO_LOG_INFO 0x8
-#define FAILLOCK_FLAG_UNLOCKED 0x10
-#define FAILLOCK_FLAG_LOCAL_ONLY 0x20
-#define FAILLOCK_FLAG_NO_DELAY 0x40
-
-#define MAX_TIME_INTERVAL 604800 /* 7 days */
-#define FAILLOCK_CONF_MAX_LINELEN 1023
-
-static const char default_faillock_conf[] = FAILLOCK_DEFAULT_CONF;
-
-struct options {
- unsigned int action;
- unsigned int flags;
- unsigned short deny;
- unsigned int fail_interval;
- unsigned int unlock_time;
- unsigned int root_unlock_time;
- char *dir;
- const char *user;
- char *admin_group;
- int failures;
- uint64_t latest_time;
- uid_t uid;
- int is_admin;
- uint64_t now;
- int fatal_error;
-};
-
-static int read_config_file(
- pam_handle_t *pamh,
- struct options *opts,
- const char *cfgfile
-);
-
-static void set_conf_opt(
- pam_handle_t *pamh,
- struct options *opts,
- const char *name,
- const char *value
-);
-
static int
args_parse(pam_handle_t *pamh, int argc, const char **argv,
int flags, struct options *opts)
@@ -112,11 +68,10 @@ args_parse(pam_handle_t *pamh, int argc, const char **argv,
int i;
int config_arg_index = -1;
int rv;
- const char *conf = default_faillock_conf;
+ const char *conf = NULL;
memset(opts, 0, sizeof(*opts));
- opts->dir = strdup(FAILLOCK_DEFAULT_TALLYDIR);
opts->deny = 3;
opts->fail_interval = 900;
opts->unlock_time = 600;
@@ -174,185 +129,11 @@ args_parse(pam_handle_t *pamh, int argc, const char **argv,
if (flags & PAM_SILENT)
opts->flags |= FAILLOCK_FLAG_SILENT;
- if (opts->dir == NULL) {
- pam_syslog(pamh, LOG_CRIT, "Error allocating memory: %m");
- opts->fatal_error = 1;
- }
-
if (opts->fatal_error)
return PAM_BUF_ERR;
return PAM_SUCCESS;
}
-/* parse a single configuration file */
-static int
-read_config_file(pam_handle_t *pamh, struct options *opts, const char *cfgfile)
-{
- FILE *f;
- char linebuf[FAILLOCK_CONF_MAX_LINELEN+1];
-
- f = fopen(cfgfile, "r");
- if (f == NULL) {
- /* ignore non-existent default config file */
- if (errno == ENOENT && cfgfile == default_faillock_conf)
- return PAM_SUCCESS;
- return PAM_SERVICE_ERR;
- }
-
- while (fgets(linebuf, sizeof(linebuf), f) != NULL) {
- size_t len;
- char *ptr;
- char *name;
- int eq;
-
- len = strlen(linebuf);
- /* len cannot be 0 unless there is a bug in fgets */
- if (len && linebuf[len - 1] != '\n' && !feof(f)) {
- (void) fclose(f);
- return PAM_SERVICE_ERR;
- }
-
- if ((ptr=strchr(linebuf, '#')) != NULL) {
- *ptr = '\0';
- } else {
- ptr = linebuf + len;
- }
-
- /* drop terminating whitespace including the \n */
- while (ptr > linebuf) {
- if (!isspace(*(ptr-1))) {
- *ptr = '\0';
- break;
- }
- --ptr;
- }
-
- /* skip initial whitespace */
- for (ptr = linebuf; isspace(*ptr); ptr++);
- if (*ptr == '\0')
- continue;
-
- /* grab the key name */
- eq = 0;
- name = ptr;
- while (*ptr != '\0') {
- if (isspace(*ptr) || *ptr == '=') {
- eq = *ptr == '=';
- *ptr = '\0';
- ++ptr;
- break;
- }
- ++ptr;
- }
-
- /* grab the key value */
- while (*ptr != '\0') {
- if (*ptr != '=' || eq) {
- if (!isspace(*ptr)) {
- break;
- }
- } else {
- eq = 1;
- }
- ++ptr;
- }
-
- /* set the key:value pair on opts */
- set_conf_opt(pamh, opts, name, ptr);
- }
-
- (void)fclose(f);
- return PAM_SUCCESS;
-}
-
-static void
-set_conf_opt(pam_handle_t *pamh, struct options *opts, const char *name, const char *value)
-{
- if (strcmp(name, "dir") == 0) {
- if (value[0] != '/') {
- pam_syslog(pamh, LOG_ERR,
- "Tally directory is not absolute path (%s); keeping default", value);
- } else {
- free(opts->dir);
- opts->dir = strdup(value);
- }
- }
- else if (strcmp(name, "deny") == 0) {
- if (sscanf(value, "%hu", &opts->deny) != 1) {
- pam_syslog(pamh, LOG_ERR,
- "Bad number supplied for deny argument");
- }
- }
- else if (strcmp(name, "fail_interval") == 0) {
- unsigned int temp;
- if (sscanf(value, "%u", &temp) != 1 ||
- temp > MAX_TIME_INTERVAL) {
- pam_syslog(pamh, LOG_ERR,
- "Bad number supplied for fail_interval argument");
- } else {
- opts->fail_interval = temp;
- }
- }
- else if (strcmp(name, "unlock_time") == 0) {
- unsigned int temp;
-
- if (strcmp(value, "never") == 0) {
- opts->unlock_time = 0;
- }
- else if (sscanf(value, "%u", &temp) != 1 ||
- temp > MAX_TIME_INTERVAL) {
- pam_syslog(pamh, LOG_ERR,
- "Bad number supplied for unlock_time argument");
- }
- else {
- opts->unlock_time = temp;
- }
- }
- else if (strcmp(name, "root_unlock_time") == 0) {
- unsigned int temp;
-
- if (strcmp(value, "never") == 0) {
- opts->root_unlock_time = 0;
- }
- else if (sscanf(value, "%u", &temp) != 1 ||
- temp > MAX_TIME_INTERVAL) {
- pam_syslog(pamh, LOG_ERR,
- "Bad number supplied for root_unlock_time argument");
- } else {
- opts->root_unlock_time = temp;
- }
- }
- else if (strcmp(name, "admin_group") == 0) {
- free(opts->admin_group);
- opts->admin_group = strdup(value);
- if (opts->admin_group == NULL) {
- opts->fatal_error = 1;
- pam_syslog(pamh, LOG_CRIT, "Error allocating memory: %m");
- }
- }
- else if (strcmp(name, "even_deny_root") == 0) {
- opts->flags |= FAILLOCK_FLAG_DENY_ROOT;
- }
- else if (strcmp(name, "audit") == 0) {
- opts->flags |= FAILLOCK_FLAG_AUDIT;
- }
- else if (strcmp(name, "silent") == 0) {
- opts->flags |= FAILLOCK_FLAG_SILENT;
- }
- else if (strcmp(name, "no_log_info") == 0) {
- opts->flags |= FAILLOCK_FLAG_NO_LOG_INFO;
- }
- else if (strcmp(name, "local_users_only") == 0) {
- opts->flags |= FAILLOCK_FLAG_LOCAL_ONLY;
- }
- else if (strcmp(name, "nodelay") == 0) {
- opts->flags |= FAILLOCK_FLAG_NO_DELAY;
- }
- else {
- pam_syslog(pamh, LOG_ERR, "Unknown option: %s", name);
- }
-}
-
static int
check_local_user (pam_handle_t *pamh, const char *user)
{
@@ -406,10 +187,11 @@ check_tally(pam_handle_t *pamh, struct options *opts, struct tally_data *tallies
unsigned int i;
uint64_t latest_time;
int failures;
+ const char *dir = get_tally_dir(opts);
opts->now = time(NULL);
- tfd = open_tally(opts->dir, opts->user, opts->uid, 0);
+ tfd = open_tally(dir, opts->user, opts->uid, 0);
*fd = tfd;
@@ -483,9 +265,10 @@ static void
reset_tally(pam_handle_t *pamh, struct options *opts, int *fd)
{
int rv;
+ const char *dir = get_tally_dir(opts);
if (*fd == -1) {
- *fd = open_tally(opts->dir, opts->user, opts->uid, 1);
+ *fd = open_tally(dir, opts->user, opts->uid, 1);
}
else {
while ((rv=ftruncate(*fd, 0)) == -1 && errno == EINTR);
@@ -504,9 +287,10 @@ write_tally(pam_handle_t *pamh, struct options *opts, struct tally_data *tallies
unsigned int oldest;
uint64_t oldtime;
const void *source = NULL;
+ const char *dir = get_tally_dir(opts);
if (*fd == -1) {
- *fd = open_tally(opts->dir, opts->user, opts->uid, 1);
+ *fd = open_tally(dir, opts->user, opts->uid, 1);
}
if (*fd == -1) {
if (errno == EACCES) {
@@ -590,9 +374,11 @@ write_tally(pam_handle_t *pamh, struct options *opts, struct tally_data *tallies
}
close(audit_fd);
#endif
- if (!(opts->flags & FAILLOCK_FLAG_NO_LOG_INFO)) {
- pam_syslog(pamh, LOG_INFO, "Consecutive login failures for user %s account temporarily locked",
- opts->user);
+ if (!(opts->flags & FAILLOCK_FLAG_NO_LOG_INFO) &&
+ ((opts->flags & FAILLOCK_FLAG_DENY_ROOT) || (opts->uid != 0))) {
+ pam_syslog(pamh, LOG_INFO,
+ "Consecutive login failures for user %s account temporarily locked",
+ opts->user);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-29 23:24:25 +0000