#include <pam/pam_appl.h>
#endif
+/* OpenGroup RFC86.0 and XSSO specify no "const" on arguments */
+#ifdef PAM_SUN_CODEBASE
+# define sshpam_const /* Solaris, HP-UX, AIX */
+#else
+# define sshpam_const const /* LinuxPAM, OpenPAM */
+#endif
+
#include "auth.h"
#include "auth-pam.h"
#include "buffer.h"
extern int compat20;
extern u_int utmp_len;
+/* so we don't silently change behaviour */
#ifdef USE_POSIX_THREADS
+# error "USE_POSIX_THREADS replaced by UNSUPPORTED_POSIX_THREADS_HACK"
+#endif
+
+/*
+ * Formerly known as USE_POSIX_THREADS, using this is completely unsupported
+ * and generally a bad idea. Use at own risk and do not expect support if
+ * this breaks.
+ */
+#ifdef UNSUPPORTED_POSIX_THREADS_HACK
#include <pthread.h>
/*
* Avoid namespace clash when *not* using pthreads for systems *with*
static void sshpam_free_ctx(void *);
static struct pam_ctxt *cleanup_ctxt;
-#ifndef USE_POSIX_THREADS
+#ifndef UNSUPPORTED_POSIX_THREADS_HACK
/*
* Simulate threads with processes.
*/
}
}
-/* Check ssh internal flags in addition to PAM */
-
-static int
-sshpam_login_allowed(Authctxt *ctxt)
-{
- if (ctxt->valid && (ctxt->pw->pw_uid != 0 ||
- options.permit_root_login == PERMIT_YES))
- return 1;
- return 0;
-}
-
/* Import regular and PAM environment from subprocess */
static void
import_environments(Buffer *b)
debug3("PAM: %s entering", __func__);
-#ifndef USE_POSIX_THREADS
+#ifndef UNSUPPORTED_POSIX_THREADS_HACK
/* Import variables set by do_pam_account */
sshpam_account_status = buffer_get_int(b);
sshpam_password_change_required(buffer_get_int(b));
* Conversation function for authentication thread.
*/
static int
-sshpam_thread_conv(int n, struct pam_message **msg,
+sshpam_thread_conv(int n, sshpam_const struct pam_message **msg,
struct pam_response **resp, void *data)
{
Buffer buffer;
struct pam_conv sshpam_conv;
int flags = (options.permit_empty_passwd == 0 ?
PAM_DISALLOW_NULL_AUTHTOK : 0);
-#ifndef USE_POSIX_THREADS
+#ifndef UNSUPPORTED_POSIX_THREADS_HACK
extern char **environ;
char **env_from_pam;
u_int i;
const char *pam_user;
+ const char **ptr_pam_user = &pam_user;
- pam_get_item(sshpam_handle, PAM_USER, (void **)&pam_user);
+ pam_get_item(sshpam_handle, PAM_USER,
+ (sshpam_const void **)ptr_pam_user);
environ[0] = NULL;
if (sshpam_authctxt != NULL) {
buffer_put_cstring(&buffer, "OK");
-#ifndef USE_POSIX_THREADS
+#ifndef UNSUPPORTED_POSIX_THREADS_HACK
/* Export variables set by do_pam_account */
buffer_put_int(&buffer, sshpam_account_status);
buffer_put_int(&buffer, sshpam_authctxt->force_pwchange);
buffer_put_int(&buffer, i);
for(i = 0; env_from_pam != NULL && env_from_pam[i] != NULL; i++)
buffer_put_cstring(&buffer, env_from_pam[i]);
-#endif /* USE_POSIX_THREADS */
+#endif /* UNSUPPORTED_POSIX_THREADS_HACK */
/* XXX - can't do much about an error here */
ssh_msg_send(ctxt->pam_csock, sshpam_err, &buffer);
}
static int
-sshpam_null_conv(int n, struct pam_message **msg,
+sshpam_null_conv(int n, sshpam_const struct pam_message **msg,
struct pam_response **resp, void *data)
{
debug3("PAM: %s entering, %d messages", __func__, n);
static struct pam_conv null_conv = { sshpam_null_conv, NULL };
static int
-sshpam_store_conv(int n, struct pam_message **msg,
+sshpam_store_conv(int n, sshpam_const struct pam_message **msg,
struct pam_response **resp, void *data)
{
struct pam_response *reply;
{
extern char *__progname;
const char *pam_rhost, *pam_user, *user = authctxt->user;
+ const char **ptr_pam_user = &pam_user;
if (sshpam_handle != NULL) {
/* We already have a PAM context; check if the user matches */
sshpam_err = pam_get_item(sshpam_handle,
- PAM_USER, (void **)&pam_user);
+ PAM_USER, (sshpam_const void **)ptr_pam_user);
if (sshpam_err == PAM_SUCCESS && strcmp(user, pam_user) == 0)
return (0);
pam_end(sshpam_handle, sshpam_err);
**prompts = NULL;
}
if (type == PAM_SUCCESS) {
- if (!sshpam_login_allowed(sshpam_authctxt))
+ if (!sshpam_authctxt->valid ||
+ (sshpam_authctxt->pw->pw_uid == 0 &&
+ options.permit_root_login != PERMIT_YES))
fatal("Internal error: PAM auth "
"succeeded when it should have "
"failed");
return (-1);
}
buffer_init(&buffer);
- if (sshpam_login_allowed(sshpam_authctxt))
+ if (sshpam_authctxt->valid &&
+ (sshpam_authctxt->pw->pw_uid != 0 ||
+ options.permit_root_login == PERMIT_YES))
buffer_put_cstring(&buffer, *resp);
else
buffer_put_cstring(&buffer, badpw);
}
static int
-sshpam_tty_conv(int n, struct pam_message **msg,
+sshpam_tty_conv(int n, sshpam_const struct pam_message **msg,
struct pam_response **resp, void *data)
{
char input[PAM_MAX_MSG_SIZE];
* display.
*/
static int
-sshpam_passwd_conv(int n, struct pam_message **msg,
+sshpam_passwd_conv(int n, sshpam_const struct pam_message **msg,
struct pam_response **resp, void *data)
{
struct pam_response *reply;
* by PermitRootLogin, use an invalid password to prevent leaking
* information via timing (eg if the PAM config has a delay on fail).
*/
- if (!sshpam_login_allowed(authctxt))
+ if (!authctxt->valid || (authctxt->pw->pw_uid == 0 &&
+ options.permit_root_login != PERMIT_YES))
sshpam_password = badpw;
sshpam_err = pam_set_item(sshpam_handle, PAM_CONV,
sshpam_err = pam_authenticate(sshpam_handle, flags);
sshpam_password = NULL;
- if (sshpam_err == PAM_SUCCESS && sshpam_login_allowed(authctxt)) {
+ if (sshpam_err == PAM_SUCCESS && authctxt->valid) {
debug("PAM: password authentication accepted for %.100s",
authctxt->user);
return 1;