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-rw-r--r--source3/nsswitch/pam_winbind.c240
1 files changed, 183 insertions, 57 deletions
diff --git a/source3/nsswitch/pam_winbind.c b/source3/nsswitch/pam_winbind.c
index ece504411b..b3dea202c2 100644
--- a/source3/nsswitch/pam_winbind.c
+++ b/source3/nsswitch/pam_winbind.c
@@ -5,29 +5,7 @@
largely based on pam_userdb by Christian Gafton <gafton@redhat.com>
*/
-#include <features.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <syslog.h>
-#include <stdarg.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#define MODULE_NAME "pam_winbind"
-#define PAM_SM_AUTH
-#define PAM_SM_ACCOUNT
-#include <security/pam_modules.h>
-#include <security/_pam_macros.h>
-
-#define PAM_DEBUG_ARG (1<<0)
-#define PAM_USE_AUTHTOK_ARG (1<<1)
-#define PAM_UNKNOWN_OK_ARG (1<<2)
-
-#include "winbind_nss_config.h"
-#include "winbindd_nss.h"
+#include "pam_winbind.h"
/* prototypes from common.c */
void init_request(struct winbindd_request *req,int rq_type);
@@ -69,38 +47,78 @@ static int _pam_parse(int argc, const char **argv)
return ctrl;
}
-
-/* talk to winbindd */
-static int winbind_request(int req_type, const char *user, const char *pass)
+static int winbind_request(enum winbindd_cmd req_type,
+ struct winbindd_request *request,
+ struct winbindd_response *response)
{
- struct winbindd_request request;
- struct winbindd_response response;
-
- ZERO_STRUCT(request);
-
- strncpy(request.data.auth.user, user, sizeof(request.data.auth.user)-1);
- strncpy(request.data.auth.pass, pass, sizeof(request.data.auth.pass)-1);
-
/* Fill in request and send down pipe */
- init_request(&request, req_type);
+ init_request(request, req_type);
- if (write_sock(&request, sizeof(request)) == -1) {
+ if (write_sock(request, sizeof(*request)) == -1) {
return -2;
}
/* Wait for reply */
- if (read_reply(&response) == -1) {
+ if (read_reply(response) == -1) {
return -2;
}
/* Copy reply data from socket */
- if (response.result != WINBINDD_OK) {
+ if (response->result != WINBINDD_OK) {
return 1;
}
return 0;
}
+/* talk to winbindd */
+static int winbind_auth_request(const char *user, const char *pass)
+{
+ struct winbindd_request request;
+ struct winbindd_response response;
+
+ ZERO_STRUCT(request);
+
+ strncpy(request.data.auth.user, user,
+ sizeof(request.data.auth.user)-1);
+
+ strncpy(request.data.auth.pass, pass,
+ sizeof(request.data.auth.pass)-1);
+
+ return winbind_request(WINBINDD_PAM_AUTH, &request, &response);
+}
+
+/* talk to winbindd */
+static int winbind_chauthtok_request(const char *user, const char *oldpass,
+ const char *newpass)
+{
+ struct winbindd_request request;
+ struct winbindd_response response;
+
+ ZERO_STRUCT(request);
+
+ if (request.data.chauthtok.user == NULL) return -2;
+
+ strncpy(request.data.chauthtok.user, user,
+ sizeof(request.data.chauthtok.user) - 1);
+
+ if (oldpass != NULL) {
+ strncpy(request.data.chauthtok.oldpass, oldpass,
+ sizeof(request.data.chauthtok.oldpass) - 1);
+ } else {
+ request.data.chauthtok.oldpass[0] = '\0';
+ }
+
+ if (newpass != NULL) {
+ strncpy(request.data.chauthtok.newpass, newpass,
+ sizeof(request.data.chauthtok.newpass) - 1);
+ } else {
+ request.data.chauthtok.newpass[0] = '\0';
+ }
+
+ return winbind_request(WINBINDD_PAM_CHAUTHTOK, &request, &response);
+}
+
/*
* Looks up an user name and checks the password
*
@@ -112,7 +130,7 @@ static int winbind_request(int req_type, const char *user, const char *pass)
*/
static int user_lookup(const char *user, const char *pass)
{
- return winbind_request(WINBINDD_PAM_AUTH, user, pass);
+ return winbind_auth_request(user, pass);
}
/*
@@ -131,11 +149,9 @@ static int valid_user(const char *user)
/* --- authentication management functions --- */
-/*
- * dummy conversation function sending exactly one prompt
- * and expecting exactly one response from the other party
- */
-static int converse(pam_handle_t *pamh,
+/* Attempt a conversation */
+
+static int converse(pam_handle_t *pamh, int nargs,
struct pam_message **message,
struct pam_response **response)
{
@@ -143,9 +159,10 @@ static int converse(pam_handle_t *pamh,
struct pam_conv *conv;
retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv ) ;
- if (retval == PAM_SUCCESS)
- retval = conv->conv(1, (const struct pam_message **)message,
+ if (retval == PAM_SUCCESS) {
+ retval = conv->conv(nargs, (const struct pam_message **)message,
response, conv->appdata_ptr);
+ }
return retval; /* propagate error status */
}
@@ -161,20 +178,20 @@ static char *_pam_delete(register char *xx)
/*
* This is a conversation function to obtain the user's password
*/
-static int conversation(pam_handle_t *pamh)
+static int auth_conversation(pam_handle_t *pamh)
{
- struct pam_message msg[2],*pmsg[2];
+ struct pam_message msg, *pmsg;
struct pam_response *resp;
int retval;
- char * token;
+ char * token = NULL;
- pmsg[0] = &msg[0];
- msg[0].msg_style = PAM_PROMPT_ECHO_OFF;
- msg[0].msg = "Password: ";
+ pmsg = &msg;
+ msg.msg_style = PAM_PROMPT_ECHO_OFF;
+ msg.msg = "Password: ";
/* so call the conversation expecting i responses */
resp = NULL;
- retval = converse(pamh, pmsg, &resp);
+ retval = converse(pamh, 1, &pmsg, &resp);
if (resp != NULL) {
char * const item;
@@ -203,7 +220,6 @@ static int conversation(pam_handle_t *pamh)
return retval;
}
-
PAM_EXTERN
int pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char **argv)
@@ -225,7 +241,7 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
if ((ctrl & PAM_USE_AUTHTOK_ARG) == 0) {
/* Converse just to be sure we have the password */
- retval = conversation(pamh);
+ retval = auth_conversation(pamh);
if (retval != PAM_SUCCESS) {
_pam_log(LOG_ERR, "could not obtain password for `%s'",
username);
@@ -336,24 +352,134 @@ int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
}
+PAM_EXTERN
+int pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc,
+ const char **argv)
+{
+ int retval;
+ char *newpw, *oldpw;
+ const char *user;
+
+ /* Get name of a user */
+
+ retval = pam_get_user(pamh, &user, "Username: ");
+
+ if (retval != PAM_SUCCESS) {
+ return retval;
+ }
+
+ /* XXX check in domain format */
+
+ /* Perform preliminary check and store requested password for updating
+ later on */
+
+ if (flags & PAM_PRELIM_CHECK) {
+ struct pam_message msg[3], *pmsg[3];
+ struct pam_response *resp;
+
+ /* Converse to ensure we have the current password */
+
+ retval = auth_conversation(pamh);
+
+ if (retval != PAM_SUCCESS) {
+ return retval;
+ }
+
+ /* Obtain and verify current password */
+
+ pmsg[0] = &msg[0];
+ msg[0].msg_style = PAM_TEXT_INFO;
+ msg[0].msg = "Changing password for user %s";
+
+ pmsg[1] = &msg[1];
+ msg[1].msg_style = PAM_PROMPT_ECHO_OFF;
+ msg[1].msg = "New NT password: ";
+
+ pmsg[2] = &msg[2];
+ msg[2].msg_style = PAM_PROMPT_ECHO_OFF;
+ msg[2].msg = "Retype new NT password: ";
+
+ resp = NULL;
+
+ retval = converse(pamh, 3, pmsg, &resp);
+
+ if (resp != NULL) {
+
+ if (retval == PAM_SUCCESS) {
+
+ /* Check password entered correctly */
+
+ if (strcmp(resp[1].resp, resp[2].resp) != 0) {
+ struct pam_response *resp2;
+
+ msg[0].msg_style = PAM_ERROR_MSG;
+ msg[0].msg = "Sorry, passwords do not match";
+
+ converse(pamh, 1, pmsg, &resp2);
+
+ _pam_drop_reply(resp, 3);
+ _pam_drop_reply(resp2, 1);
+
+ return PAM_AUTHTOK_RECOVER_ERR;
+ }
+
+ /* Store passwords */
+
+ retval = pam_set_item(pamh, PAM_OLDAUTHTOK, resp[1].resp);
+ _pam_drop_reply(resp, 3);
+ }
+ }
+
+ /* XXX What happens if root? */
+ /* XXX try first pass and use first pass args */
+
+ return retval;
+ }
+
+ if (flags & PAM_UPDATE_AUTHTOK) {
+
+ retval = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **)&newpw);
+ if (retval != PAM_SUCCESS) {
+ return PAM_AUTHTOK_ERR;
+ }
+
+ retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&oldpw);
+ if (retval != PAM_SUCCESS) {
+ return PAM_AUTHTOK_ERR;
+ }
+
+ fprintf(stderr, "oldpw = %s, newpw = %s\n", oldpw, newpw);
+
+ if (retval == PAM_SUCCESS &&
+ winbind_chauthtok_request(user, oldpw, newpw) == 0) {
+ return PAM_SUCCESS;
+ }
+
+ return PAM_AUTHTOK_ERR;
+ }
+
+ return PAM_SERVICE_ERR;
+}
+
#ifdef PAM_STATIC
/* static module data */
-struct pam_module _pam_userdb_modstruct = {
+struct pam_module _pam_winbind_modstruct = {
MODULE_NAME,
pam_sm_authenticate,
pam_sm_setcred,
pam_sm_acct_mgmt,
NULL,
NULL,
- NULL,
+ pam_sm_chauthtok
};
#endif
/*
* Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
+ * Copyright (c) Tim Potter <tpot@samba.org> 2000
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
generated by cgit (git 2.34.1) at 2024-12-22 21:48:11 +0000