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authorTomas Mraz <tm@t8m.info>2008-05-02 12:41:32 +0000
committerTomas Mraz <tm@t8m.info>2008-05-02 12:41:32 +0000
commit8aab1ab0b2564be02ac942fc39c043cd7b32008e (patch)
tree2b2fde81baa029ab0f4d0a167e13ee9c02f8013c /modules/pam_selinux
parent52f517dd540bdd12c5fa239bd7f60b51aaea9326 (diff)
Relevant BUGIDs:
Purpose of commit: cleanup Commit summary: --------------- 2008-05-02 Tomas Mraz <t8m@centrum.cz> * modules/pam_selinux/pam_selinux.c(query_response): Add handling for NULL response. (manual_context): Handle failed query_response() properly. Rename variable responses to response which is more correct name. (config_context): Likewise. (pam_sm_open_session): Do not base decision on whether there is a tty.
Diffstat (limited to 'modules/pam_selinux')
-rw-r--r--modules/pam_selinux/pam_selinux.c120
1 files changed, 63 insertions, 57 deletions
diff --git a/modules/pam_selinux/pam_selinux.c b/modules/pam_selinux/pam_selinux.c
index da49f3f9..da1290f0 100644
--- a/modules/pam_selinux/pam_selinux.c
+++ b/modules/pam_selinux/pam_selinux.c
@@ -138,15 +138,22 @@ send_text (pam_handle_t *pamh, const char *text, int debug)
*/
static int
query_response (pam_handle_t *pamh, const char *text, const char *def,
- char **responses, int debug)
+ char **response, int debug)
{
int rc;
if (def)
- rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, responses, "%s [%s] ", text, def);
+ rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, response, "%s [%s] ", text, def);
else
- rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, responses, "%s ", text);
- if (debug)
- pam_syslog(pamh, LOG_NOTICE, "%s %s", text, responses[0]);
+ rc = pam_prompt (pamh, PAM_PROMPT_ECHO_ON, response, "%s ", text);
+
+ if (*response == NULL) {
+ rc = PAM_CONV_ERR;
+ }
+
+ if (rc != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_WARNING, "No response to query: %s", text);
+ } else if (debug)
+ pam_syslog(pamh, LOG_NOTICE, "%s %s", text, *response);
return rc;
}
@@ -157,13 +164,15 @@ manual_context (pam_handle_t *pamh, const char *user, int debug)
context_t new_context;
int mls_enabled = is_selinux_mls_enabled();
char *type=NULL;
- char *responses=NULL;
+ char *response=NULL;
while (1) {
- query_response(pamh,
- _("Would you like to enter a security context? [N] "), NULL,
- &responses,debug);
- if ((responses[0] == 'y') || (responses[0] == 'Y'))
+ if (query_response(pamh,
+ _("Would you like to enter a security context? [N] "), NULL,
+ &response, debug) != PAM_SUCCESS)
+ return NULL;
+
+ if ((response[0] == 'y') || (response[0] == 'Y'))
{
if (mls_enabled)
new_context = context_new ("user:role:type:level");
@@ -176,26 +185,29 @@ manual_context (pam_handle_t *pamh, const char *user, int debug)
if (context_user_set (new_context, user))
goto fail_set;
- _pam_drop(responses);
+ _pam_drop(response);
/* Allow the user to enter each field of the context individually */
- query_response(pamh,_("role:"), NULL, &responses,debug);
- if (responses[0] != '\0') {
- if (context_role_set (new_context, responses))
+ if (query_response(pamh, _("role:"), NULL, &response, debug) == PAM_SUCCESS &&
+ response[0] != '\0') {
+ if (context_role_set (new_context, response))
goto fail_set;
- if (get_default_type(responses, &type))
+ if (get_default_type(response, &type))
goto fail_set;
if (context_type_set (new_context, type))
goto fail_set;
}
- _pam_drop(responses);
+ _pam_drop(response);
+
if (mls_enabled)
{
- query_response(pamh,_("level:"), NULL, &responses,debug);
- if (responses[0] != '\0') {
- if (context_range_set (new_context, responses))
+ if (query_response(pamh, _("level:"), NULL, &response, debug) == PAM_SUCCESS &&
+ response[0] != '\0') {
+ if (context_range_set (new_context, response))
goto fail_set;
}
+ _pam_drop(response);
}
+
/* Get the string value of the context and see if it is valid. */
if (!security_check_context(context_str(new_context))) {
newcon = strdup(context_str(new_context));
@@ -204,16 +216,17 @@ manual_context (pam_handle_t *pamh, const char *user, int debug)
}
else
send_text(pamh,_("Not a valid security context"),debug);
- context_free (new_context);
+
+ context_free (new_context);
}
else {
- _pam_drop(responses);
+ _pam_drop(response);
return NULL;
}
} /* end while */
fail_set:
free(type);
- _pam_drop(responses);
+ _pam_drop(response);
context_free (new_context);
return NULL;
}
@@ -244,49 +257,52 @@ config_context (pam_handle_t *pamh, security_context_t puser_context, int debug)
security_context_t newcon=NULL;
context_t new_context;
int mls_enabled = is_selinux_mls_enabled();
- char *responses=NULL;
+ char *response=NULL;
char *type=NULL;
char resp_val = 0;
pam_prompt (pamh, PAM_TEXT_INFO, NULL, _("Default Security Context %s\n"), puser_context);
while (1) {
- query_response(pamh,
+ if (query_response(pamh,
_("Would you like to enter a different role or level?"), "n",
- &responses,debug);
-
- resp_val = responses[0];
- _pam_drop(responses);
+ &response, debug) == PAM_SUCCESS) {
+ resp_val = response[0];
+ _pam_drop(response);
+ } else {
+ resp_val = 'N';
+ }
if ((resp_val == 'y') || (resp_val == 'Y'))
{
- new_context = context_new(puser_context);
-
+ if ((new_context = context_new(puser_context)) == NULL)
+ goto fail_set;
+
/* Allow the user to enter role and level individually */
- query_response(pamh,_("role:"), context_role_get(new_context),
- &responses, debug);
- if (responses[0]) {
- if (get_default_type(responses, &type)) {
- pam_prompt (pamh, PAM_ERROR_MSG, NULL, _("No default type for role %s\n"), responses);
- _pam_drop(responses);
+ if (query_response(pamh, _("role:"), context_role_get(new_context),
+ &response, debug) == PAM_SUCCESS && response[0]) {
+ if (get_default_type(response, &type)) {
+ pam_prompt (pamh, PAM_ERROR_MSG, NULL, _("No default type for role %s\n"), response);
+ _pam_drop(response);
continue;
} else {
- if (context_role_set(new_context, responses))
+ if (context_role_set(new_context, response))
goto fail_set;
if (context_type_set (new_context, type))
goto fail_set;
}
}
- _pam_drop(responses);
+ _pam_drop(response);
+
if (mls_enabled)
{
- query_response(pamh,_("level:"), context_range_get(new_context),
- &responses, debug);
- if (responses[0]) {
- if (context_range_set(new_context, responses))
+ if (query_response(pamh, _("level:"), context_range_get(new_context),
+ &response, debug) == PAM_SUCCESS && response[0]) {
+ if (context_range_set(new_context, response))
goto fail_set;
}
- _pam_drop(responses);
+ _pam_drop(response);
}
+
if (debug)
pam_syslog(pamh, LOG_NOTICE, "Selected Security Context %s", context_str(new_context));
@@ -322,7 +338,7 @@ config_context (pam_handle_t *pamh, security_context_t puser_context, int debug)
fail_set:
free(type);
- _pam_drop(responses);
+ _pam_drop(response);
context_free (new_context);
send_audit_message(pamh, 0, puser_context, NULL);
fail_range:
@@ -439,7 +455,7 @@ PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
int argc, const char **argv)
{
- int i, debug = 0, ttys=1, has_tty=isatty(0);
+ int i, debug = 0, ttys=1;
int verbose=0, close_session=0;
int select_context = 0;
int use_current_range = 0;
@@ -513,7 +529,7 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
return PAM_AUTH_ERR;
}
user_context = default_user_context;
- if (select_context && has_tty) {
+ if (select_context) {
user_context = config_context(pamh, default_user_context, debug);
if (user_context == NULL) {
freecon(default_user_context);
@@ -528,7 +544,6 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
}
}
else {
- if (has_tty) {
user_context = manual_context(pamh,seuser,debug);
if (user_context == NULL) {
pam_syslog (pamh, LOG_ERR, "Unable to get valid context for %s",
@@ -538,15 +553,6 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
else
return PAM_SUCCESS;
}
- } else {
- pam_syslog (pamh, LOG_ERR,
- "Unable to get valid context for %s, No valid tty",
- username);
- if (security_getenforce() == 1)
- return PAM_AUTH_ERR;
- else
- return PAM_SUCCESS;
- }
}
if (use_current_range && is_selinux_mls_enabled()) {
@@ -613,7 +619,7 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
}
}
}
- if(ttys && tty ) {
+ if (ttys && tty) {
ttyn=strdup(tty);
ttyn_context=security_label_tty(pamh,ttyn,user_context);
}