#ifdef USE_PAM
#include "ssh.h"
#include "xmalloc.h"
+#include "log.h"
#include "servconf.h"
+#include "canohost.h"
+#include "readpass.h"
RCSID("$Id$");
static char *pam_msg = NULL;
/* states for pamconv() */
-typedef enum { INITIAL_LOGIN, OTHER } pamstates;
-static pamstates pamstate = INITIAL_LOGIN;
+enum { INITIAL_LOGIN, OTHER } pamstate = INITIAL_LOGIN;
/* remember whether pam_acct_mgmt() returned PAM_NEWAUTHTOK_REQD */
static int password_change_required = 0;
+/* remember whether the last pam_authenticate() succeeded or not */
+static int was_authenticated = 0;
+
+/* accessor which allows us to switch conversation structs according to
+ * the authentication method being used */
+void pam_set_conv(struct pam_conv *conv)
+{
+ pam_set_item(pamh, PAM_CONV, conv);
+}
+
+/* start an authentication run */
+int do_pam_authenticate(int flags)
+{
+ int retval = pam_authenticate(pamh, flags);
+ was_authenticated = (retval == PAM_SUCCESS);
+ return retval;
+}
/*
* PAM conversation function.
/* PAM will free this later */
reply = malloc(num_msg * sizeof(*reply));
if (reply == NULL)
- return PAM_CONV_ERR;
+ return PAM_CONV_ERR;
for (count = 0; count < num_msg; count++) {
- switch ((*msg)[count].msg_style) {
+ switch(PAM_MSG_MEMBER(msg, count, msg_style)) {
case PAM_PROMPT_ECHO_ON:
if (pamstate == INITIAL_LOGIN) {
free(reply);
return PAM_CONV_ERR;
} else {
- fputs((*msg)[count].msg, stderr);
+ fputs(PAM_MSG_MEMBER(msg, count, msg), stderr);
fgets(buf, sizeof(buf), stdin);
reply[count].resp = xstrdup(buf);
reply[count].resp_retcode = PAM_SUCCESS;
}
reply[count].resp = xstrdup(pampasswd);
} else {
- reply[count].resp =
- xstrdup(read_passphrase((*msg)[count].msg, 1));
+ reply[count].resp =
+ xstrdup(read_passphrase(PAM_MSG_MEMBER(msg, count, msg), 1));
}
reply[count].resp_retcode = PAM_SUCCESS;
break;
case PAM_TEXT_INFO:
if ((*msg)[count].msg != NULL) {
if (pamstate == INITIAL_LOGIN)
- pam_msg_cat((*msg)[count].msg);
+ pam_msg_cat(PAM_MSG_MEMBER(msg, count, msg));
else {
- fputs((*msg)[count].msg, stderr);
+ fputs(PAM_MSG_MEMBER(msg, count, msg), stderr);
fputs("\n", stderr);
}
}
{
pam_retval = pam_close_session(pamh, 0);
if (pam_retval != PAM_SUCCESS) {
- log("Cannot close PAM session[%d]: %.200s",
+ log("Cannot close PAM session[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
pam_retval = pam_setcred(pamh, PAM_DELETE_CRED);
if (pam_retval != PAM_SUCCESS) {
- debug("Cannot delete credentials[%d]: %.200s",
+ debug("Cannot delete credentials[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
pam_retval = pam_end(pamh, pam_retval);
if (pam_retval != PAM_SUCCESS) {
- log("Cannot release PAM authentication[%d]: %.200s",
+ log("Cannot release PAM authentication[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
extern ServerOptions options;
int pam_retval;
+ pam_set_conv(&conv);
+
/* deny if no user. */
if (pw == NULL)
return 0;
return 0;
pampasswd = password;
-
+
pamstate = INITIAL_LOGIN;
- pam_retval = pam_authenticate(pamh, 0);
+ pam_retval = do_pam_authenticate(0);
if (pam_retval == PAM_SUCCESS) {
- debug("PAM Password authentication accepted for user \"%.100s\"",
+ debug("PAM Password authentication accepted for user \"%.100s\"",
pw->pw_name);
return 1;
} else {
- debug("PAM Password authentication for \"%.100s\" failed[%d]: %s",
+ debug("PAM Password authentication for \"%.100s\" failed[%d]: %s",
pw->pw_name, pam_retval, PAM_STRERROR(pamh, pam_retval));
return 0;
}
int do_pam_account(char *username, char *remote_user)
{
int pam_retval;
-
- debug("PAM setting rhost to \"%.200s\"", get_canonical_hostname());
- pam_retval = pam_set_item(pamh, PAM_RHOST,
- get_canonical_hostname());
+ extern ServerOptions options;
+
+ debug("PAM setting rhost to \"%.200s\"",
+ get_canonical_hostname(options.reverse_mapping_check));
+ pam_retval = pam_set_item(pamh, PAM_RHOST,
+ get_canonical_hostname(options.reverse_mapping_check));
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM set rhost failed[%d]: %.200s",
+ fatal("PAM set rhost failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
debug("PAM setting ruser to \"%.200s\"", remote_user);
pam_retval = pam_set_item(pamh, PAM_RUSER, remote_user);
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM set ruser failed[%d]: %.200s",
+ fatal("PAM set ruser failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
password_change_required = 1;
break;
default:
- log("PAM rejected by account configuration[%d]: %.200s",
+ log("PAM rejected by account configuration[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
return(0);
}
-
+
return(1);
}
debug("PAM setting tty to \"%.200s\"", ttyname);
pam_retval = pam_set_item(pamh, PAM_TTY, ttyname);
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM set tty failed[%d]: %.200s",
+ fatal("PAM set tty failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
pam_retval = pam_open_session(pamh, 0);
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM session setup failed[%d]: %.200s",
+ fatal("PAM session setup failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
-/* Set PAM credentials */
-void do_pam_setcred()
+/* Set PAM credentials */
+void do_pam_setcred(void)
{
int pam_retval;
-
+
debug("PAM establishing creds");
pam_retval = pam_setcred(pamh, PAM_ESTABLISH_CRED);
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM setcred failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(pamh, pam_retval));
+ if(was_authenticated) {
+ fatal("PAM setcred failed[%d]: %.200s",
+ pam_retval, PAM_STRERROR(pamh, pam_retval));
+ } else {
+ debug("PAM setcred failed[%d]: %.200s",
+ pam_retval, PAM_STRERROR(pamh, pam_retval));
+ }
}
}
return password_change_required;
}
-/*
+/*
* Have user change authentication token if pam_acct_mgmt() indicated
* it was expired. This needs to be called after an interactive
* session is established and the user's pty is connected to
* stdin/stout/stderr.
*/
-void do_pam_chauthtok()
+void do_pam_chauthtok(void)
{
int pam_retval;
do {
pam_retval = pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
if (pam_retval != PAM_SUCCESS) {
- log("PAM pam_chauthtok failed[%d]: %.200s",
+ log("PAM pam_chauthtok failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
} while (pam_retval != PAM_SUCCESS);
}
/* Start PAM authentication for specified account */
-void start_pam(struct passwd *pw)
+void start_pam(const char *user)
{
int pam_retval;
- debug("Starting up PAM with username \"%.200s\"", pw->pw_name);
+ debug("Starting up PAM with username \"%.200s\"", user);
- pam_retval = pam_start(SSHD_PAM_SERVICE, pw->pw_name, &conv, &pamh);
+ pam_retval = pam_start(SSHD_PAM_SERVICE, user, &conv, &pamh);
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM initialisation failed[%d]: %.200s",
+ fatal("PAM initialisation failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
#ifdef PAM_TTY_KLUDGE
/*
* Some PAM modules (e.g. pam_time) require a TTY to operate,
- * and will fail in various stupid ways if they don't get one.
+ * and will fail in various stupid ways if they don't get one.
* sshd doesn't set the tty until too late in the auth process and may
* not even need one (for tty-less connections)
- * Kludge: Set a fake PAM_TTY
+ * Kludge: Set a fake PAM_TTY
*/
pam_retval = pam_set_item(pamh, PAM_TTY, "ssh");
if (pam_retval != PAM_SUCCESS) {
- fatal("PAM set tty failed[%d]: %.200s",
+ fatal("PAM set tty failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
#endif /* PAM_TTY_KLUDGE */
char *p;
size_t new_msg_len;
size_t pam_msg_len;
-
+
new_msg_len = strlen(msg);
-
+
if (pam_msg) {
pam_msg_len = strlen(pam_msg);
pam_msg = xrealloc(pam_msg, new_msg_len + pam_msg_len + 2);
andersk / openssh.git / blobdiff