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authorJan Zeleny <jzeleny@redhat.com>2012-01-30 06:31:51 -0500
committerStephen Gallagher <sgallagh@redhat.com>2012-02-06 08:25:22 -0500
commit264bbfed9f2cdb05d9e017e9e3307f37edb4c1da (patch)
treed86d9a17f296522331403de8b6308f48cfec7467 /src
parent45fea2d9ec14f49d6d88b28958b28d580d7116b3 (diff)
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SELinux support in PAM module
Diffstat (limited to 'src')
-rw-r--r--src/sss_client/pam_sss.c61
1 files changed, 60 insertions, 1 deletions
diff --git a/src/sss_client/pam_sss.c b/src/sss_client/pam_sss.c
index 582a96f70..a7eb60309 100644
--- a/src/sss_client/pam_sss.c
+++ b/src/sss_client/pam_sss.c
@@ -41,6 +41,7 @@
#include <security/pam_modules.h>
#include <security/pam_ext.h>
#include <security/pam_modutil.h>
+#include <selinux/selinux.h>
#include "sss_pam_macros.h"
#include "sss_cli.h"
@@ -81,6 +82,7 @@ struct pam_items {
pid_t cli_pid;
const char *login_name;
char *domain_name;
+ char *selinux_user;
};
#define DEBUG_MGS_LEN 1024
@@ -965,6 +967,13 @@ static int eval_response(pam_handle_t *pamh, size_t buflen, uint8_t *buf,
D(("do_pam_conversation failed."));
}
break;
+ case SSS_PAM_SELINUX_MAP:
+ if (pi->selinux_user) {
+ free(pi->selinux_user);
+ }
+ pi->selinux_user = (char *)malloc(len + 1);
+ memcpy(pi->selinux_user, &buf[p], len + 1);
+ break;
default:
D(("Unknown response type [%d]", type));
}
@@ -986,6 +995,7 @@ static int get_pam_items(pam_handle_t *pamh, struct pam_items *pi)
pi->pam_newauthtok_type = SSS_AUTHTOK_TYPE_EMPTY;
pi->pam_newauthtok = NULL;
pi->pam_newauthtok_size = 0;
+ pi->selinux_user = NULL;
ret = pam_get_item(pamh, PAM_SERVICE, (const void **) &(pi->pam_service));
if (ret != PAM_SUCCESS) return ret;
@@ -1069,6 +1079,12 @@ static int send_and_receive(pam_handle_t *pamh, struct pam_items *pi,
size_t replen;
int pam_status = PAM_SYSTEM_ERR;
+ char *path = NULL;
+ char *tmp_path = NULL;
+ int pos, len;
+ int fd;
+ mode_t oldmask;
+
print_pam_items(pi);
ret = pack_message_v3(pi, &rd.len, &buf);
@@ -1158,8 +1174,51 @@ static int send_and_receive(pam_handle_t *pamh, struct pam_items *pi,
}
}
break;
- case SSS_PAM_SETCRED:
case SSS_PAM_OPEN_SESSION:
+ if (pi->selinux_user == NULL) {
+ pam_status = PAM_SUCCESS;
+ break;
+ }
+
+ if (asprintf(&path, "%s/logins/%s", selinux_policy_root(),
+ pi->pam_user) < 0 ||
+ asprintf(&tmp_path, "%sXXXXXX", path) < 0) {
+ pam_status = PAM_SYSTEM_ERR;
+ goto done;
+ }
+
+ oldmask = umask(022);
+ fd = mkstemp(tmp_path);
+ if (fd < 0) {
+ logger(pamh, LOG_ERR, "creating the temp file for SELinux "
+ "data failed. %s", tmp_path);
+ pam_status = PAM_SYSTEM_ERR;
+ goto done;
+ }
+
+ pos = 0;
+ len = strlen(pi->selinux_user);
+ while (pos < len) {
+ ret = write(fd, pi->selinux_user + pos, len-pos);
+ if (ret < 0) {
+ if (errno != EINTR) {
+ logger(pamh, LOG_ERR, "writing to SELinux data file "
+ "failed. %s", tmp_path);
+ pam_status = PAM_SYSTEM_ERR;
+ goto done;
+ }
+ continue;
+ }
+ pos += ret;
+ }
+ close(fd);
+
+ rename(tmp_path, path);
+ free(path);
+ free(tmp_path);
+ umask(oldmask);
+ break;
+ case SSS_PAM_SETCRED:
case SSS_PAM_CLOSE_SESSION:
break;
default: