/*
- Unix SMB/Netbios implementation.
- Version 2.2.
+ Unix SMB/CIFS implementation.
PAM Password checking
Copyright (C) Andrew Tridgell 1992-2001
Copyright (C) John H Terpsta 1999-2001
#include "includes.h"
-extern int DEBUGLEVEL;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
#ifdef WITH_PAM
#include <security/pam_appl.h>
/*
- * Static variables used to communicate between the conversation function
- * and the server_login function
+ * Structure used to communicate between the conversation function
+ * and the server_login/change password functions.
*/
-static char *PAM_username;
-static char *PAM_password;
+struct smb_pam_userdata {
+ const char *PAM_username;
+ const char *PAM_password;
+ const char *PAM_newpassword;
+};
+
+typedef int (*smb_pam_conv_fn)(int, const struct pam_message **, struct pam_response **, void *appdata_ptr);
/*
* Macros to help make life easy
*/
#define COPY_STRING(s) (s) ? strdup(s) : NULL
-/*
- * PAM error handler.
- */
-static BOOL smb_pam_error_handler(pam_handle_t *pamh, int pam_error, char *msg, int dbglvl)
+/*******************************************************************
+ PAM error handler.
+ *********************************************************************/
+
+static BOOL smb_pam_error_handler(pam_handle_t *pamh, int pam_error, const char *msg, int dbglvl)
{
if( pam_error != PAM_SUCCESS) {
- DEBUG(dbglvl, ("PAM: %s : %s\n", msg, pam_strerror(pamh, pam_error)));
+ DEBUG(dbglvl, ("smb_pam_error_handler: PAM: %s : %s\n",
+ msg, pam_strerror(pamh, pam_error)));
+
return False;
}
return True;
}
+/*******************************************************************
+ This function is a sanity check, to make sure that we NEVER report
+ failure as sucess.
+*********************************************************************/
+
+static BOOL smb_pam_nt_status_error_handler(pam_handle_t *pamh, int pam_error,
+ const char *msg, int dbglvl,
+ NTSTATUS *nt_status)
+{
+ *nt_status = pam_to_nt_status(pam_error);
+
+ if (smb_pam_error_handler(pamh, pam_error, msg, dbglvl))
+ return True;
+
+ if (NT_STATUS_IS_OK(*nt_status)) {
+ /* Complain LOUDLY */
+ DEBUG(0, ("smb_pam_nt_status_error_handler: PAM: BUG: PAM and NT_STATUS \
+error MISMATCH, forcing to NT_STATUS_LOGON_FAILURE"));
+ *nt_status = NT_STATUS_LOGON_FAILURE;
+ }
+ return False;
+}
+
/*
* PAM conversation function
* Here we assume (for now, at least) that echo on means login name, and
{
int replies = 0;
struct pam_response *reply = NULL;
+ struct smb_pam_userdata *udp = (struct smb_pam_userdata *)appdata_ptr;
+
+ *resp = NULL;
+
+ if (num_msg <= 0)
+ return PAM_CONV_ERR;
+
+ /*
+ * Apparantly HPUX has a buggy PAM that doesn't support the
+ * appdata_ptr. Fail if this is the case. JRA.
+ */
+
+ if (udp == NULL) {
+ DEBUG(0,("smb_pam_conv: PAM on this system is broken - appdata_ptr == NULL !\n"));
+ return PAM_CONV_ERR;
+ }
reply = malloc(sizeof(struct pam_response) * num_msg);
if (!reply)
return PAM_CONV_ERR;
+ memset(reply, '\0', sizeof(struct pam_response) * num_msg);
+
for (replies = 0; replies < num_msg; replies++) {
switch (msg[replies]->msg_style) {
case PAM_PROMPT_ECHO_ON:
reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp =
- COPY_STRING(PAM_username);
+ reply[replies].resp = COPY_STRING(udp->PAM_username);
/* PAM frees resp */
break;
case PAM_PROMPT_ECHO_OFF:
reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp =
- COPY_STRING(PAM_password);
+ reply[replies].resp = COPY_STRING(udp->PAM_password);
/* PAM frees resp */
break;
default:
/* Must be an error of some sort... */
- free(reply);
+ SAFE_FREE(reply);
return PAM_CONV_ERR;
}
}
return PAM_SUCCESS;
}
-static struct pam_conv smb_pam_conversation = {
- &smb_pam_conv,
- NULL
+/*
+ * PAM password change conversation function
+ * Here we assume (for now, at least) that echo on means login name, and
+ * echo off means password.
+ */
+
+static void special_char_sub(char *buf)
+{
+ all_string_sub(buf, "\\n", "", 0);
+ all_string_sub(buf, "\\r", "", 0);
+ all_string_sub(buf, "\\s", " ", 0);
+ all_string_sub(buf, "\\t", "\t", 0);
+}
+
+static void pwd_sub(char *buf, const char *username, const char *oldpass, const char *newpass)
+{
+ fstring_sub(buf, "%u", username);
+ all_string_sub(buf, "%o", oldpass, sizeof(fstring));
+ all_string_sub(buf, "%n", newpass, sizeof(fstring));
+}
+
+
+struct chat_struct {
+ struct chat_struct *next, *prev;
+ fstring prompt;
+ fstring reply;
};
+/**************************************************************
+ Create a linked list containing chat data.
+***************************************************************/
+
+static struct chat_struct *make_pw_chat(char *p)
+{
+ fstring prompt;
+ fstring reply;
+ struct chat_struct *list = NULL;
+ struct chat_struct *t;
+ struct chat_struct *tmp;
+
+ while (1) {
+ t = (struct chat_struct *)malloc(sizeof(*t));
+ if (!t) {
+ DEBUG(0,("make_pw_chat: malloc failed!\n"));
+ return NULL;
+ }
+
+ ZERO_STRUCTP(t);
+
+ DLIST_ADD_END(list, t, tmp);
+
+ if (!next_token(&p, prompt, NULL, sizeof(fstring)))
+ break;
+
+ if (strequal(prompt,"."))
+ fstrcpy(prompt,"*");
+
+ special_char_sub(prompt);
+ fstrcpy(t->prompt, prompt);
+ strlower_m(t->prompt);
+ trim_string(t->prompt, " ", " ");
+
+ if (!next_token(&p, reply, NULL, sizeof(fstring)))
+ break;
+
+ if (strequal(reply,"."))
+ fstrcpy(reply,"");
+
+ special_char_sub(reply);
+ fstrcpy(t->reply, reply);
+ strlower_m(t->reply);
+ trim_string(t->reply, " ", " ");
+
+ }
+ return list;
+}
+
+static void free_pw_chat(struct chat_struct *list)
+{
+ while (list) {
+ struct chat_struct *old_head = list;
+ DLIST_REMOVE(list, list);
+ SAFE_FREE(old_head);
+ }
+}
+
+static int smb_pam_passchange_conv(int num_msg,
+ const struct pam_message **msg,
+ struct pam_response **resp,
+ void *appdata_ptr)
+{
+ int replies = 0;
+ struct pam_response *reply = NULL;
+ fstring current_prompt;
+ fstring current_reply;
+ struct smb_pam_userdata *udp = (struct smb_pam_userdata *)appdata_ptr;
+ struct chat_struct *pw_chat= make_pw_chat(lp_passwd_chat());
+ struct chat_struct *t;
+ BOOL found;
+ *resp = NULL;
+
+ DEBUG(10,("smb_pam_passchange_conv: starting converstation for %d messages\n", num_msg));
+
+ if (num_msg <= 0)
+ return PAM_CONV_ERR;
+
+ if (pw_chat == NULL)
+ return PAM_CONV_ERR;
+
+ /*
+ * Apparantly HPUX has a buggy PAM that doesn't support the
+ * appdata_ptr. Fail if this is the case. JRA.
+ */
+
+ if (udp == NULL) {
+ DEBUG(0,("smb_pam_passchange_conv: PAM on this system is broken - appdata_ptr == NULL !\n"));
+ free_pw_chat(pw_chat);
+ return PAM_CONV_ERR;
+ }
+
+ reply = malloc(sizeof(struct pam_response) * num_msg);
+ if (!reply) {
+ DEBUG(0,("smb_pam_passchange_conv: malloc for reply failed!\n"));
+ free_pw_chat(pw_chat);
+ return PAM_CONV_ERR;
+ }
+
+ for (replies = 0; replies < num_msg; replies++) {
+ found = False;
+ DEBUG(10,("smb_pam_passchange_conv: Processing message %d\n", replies));
+ switch (msg[replies]->msg_style) {
+ case PAM_PROMPT_ECHO_ON:
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: PAM said: %s\n", msg[replies]->msg));
+ fstrcpy(current_prompt, msg[replies]->msg);
+ trim_string(current_prompt, " ", " ");
+ for (t=pw_chat; t; t=t->next) {
+
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: trying to match |%s| to |%s|\n",
+ t->prompt, current_prompt ));
+
+ if (unix_wild_match(t->prompt, current_prompt) == 0) {
+ fstrcpy(current_reply, t->reply);
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: We sent: %s\n", current_reply));
+ pwd_sub(current_reply, udp->PAM_username, udp->PAM_password, udp->PAM_newpassword);
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: We actualy sent: %s\n", current_reply));
+#endif
+ reply[replies].resp_retcode = PAM_SUCCESS;
+ reply[replies].resp = COPY_STRING(current_reply);
+ found = True;
+ break;
+ }
+ }
+ /* PAM frees resp */
+ if (!found) {
+ DEBUG(3,("smb_pam_passchange_conv: Could not find reply for PAM prompt: %s\n",msg[replies]->msg));
+ free_pw_chat(pw_chat);
+ SAFE_FREE(reply);
+ return PAM_CONV_ERR;
+ }
+ break;
+
+ case PAM_PROMPT_ECHO_OFF:
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: PAM said: %s\n", msg[replies]->msg));
+ fstrcpy(current_prompt, msg[replies]->msg);
+ trim_string(current_prompt, " ", " ");
+ for (t=pw_chat; t; t=t->next) {
+
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: trying to match |%s| to |%s|\n",
+ t->prompt, current_prompt ));
+
+ if (unix_wild_match(t->prompt, current_prompt) == 0) {
+ fstrcpy(current_reply, t->reply);
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: We sent: %s\n", current_reply));
+ pwd_sub(current_reply, udp->PAM_username, udp->PAM_password, udp->PAM_newpassword);
+ reply[replies].resp_retcode = PAM_SUCCESS;
+ reply[replies].resp = COPY_STRING(current_reply);
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: We actualy sent: %s\n", current_reply));
+#endif
+ found = True;
+ break;
+ }
+ }
+ /* PAM frees resp */
+
+ if (!found) {
+ DEBUG(3,("smb_pam_passchange_conv: Could not find reply for PAM prompt: %s\n",msg[replies]->msg));
+ free_pw_chat(pw_chat);
+ SAFE_FREE(reply);
+ return PAM_CONV_ERR;
+ }
+ break;
+
+ case PAM_TEXT_INFO:
+ /* fall through */
+
+ case PAM_ERROR_MSG:
+ /* ignore it... */
+ reply[replies].resp_retcode = PAM_SUCCESS;
+ reply[replies].resp = NULL;
+ break;
+
+ default:
+ /* Must be an error of some sort... */
+ free_pw_chat(pw_chat);
+ SAFE_FREE(reply);
+ return PAM_CONV_ERR;
+ }
+ }
+
+ free_pw_chat(pw_chat);
+ if (reply)
+ *resp = reply;
+ return PAM_SUCCESS;
+}
+
+/***************************************************************************
+ Free up a malloced pam_conv struct.
+****************************************************************************/
+
+static void smb_free_pam_conv(struct pam_conv *pconv)
+{
+ if (pconv)
+ SAFE_FREE(pconv->appdata_ptr);
+
+ SAFE_FREE(pconv);
+}
+
+/***************************************************************************
+ Allocate a pam_conv struct.
+****************************************************************************/
+
+static struct pam_conv *smb_setup_pam_conv(smb_pam_conv_fn smb_pam_conv_fnptr, const char *user,
+ const char *passwd, const char *newpass)
+{
+ struct pam_conv *pconv = (struct pam_conv *)malloc(sizeof(struct pam_conv));
+ struct smb_pam_userdata *udp = (struct smb_pam_userdata *)malloc(sizeof(struct smb_pam_userdata));
+
+ if (pconv == NULL || udp == NULL) {
+ SAFE_FREE(pconv);
+ SAFE_FREE(udp);
+ return NULL;
+ }
+
+ udp->PAM_username = user;
+ udp->PAM_password = passwd;
+ udp->PAM_newpassword = newpass;
+
+ pconv->conv = smb_pam_conv_fnptr;
+ pconv->appdata_ptr = (void *)udp;
+ return pconv;
+}
+
/*
* PAM Closing out cleanup handler
*/
-static BOOL smb_pam_end(pam_handle_t *pamh)
+
+static BOOL smb_pam_end(pam_handle_t *pamh, struct pam_conv *smb_pam_conv_ptr)
{
int pam_error;
+
+ smb_free_pam_conv(smb_pam_conv_ptr);
if( pamh != NULL ) {
pam_error = pam_end(pamh, 0);
if(smb_pam_error_handler(pamh, pam_error, "End Cleanup Failed", 2) == True) {
- DEBUG(4, ("PAM: PAM_END OK.\n"));
+ DEBUG(4, ("smb_pam_end: PAM: PAM_END OK.\n"));
return True;
}
}
- DEBUG(2,("PAM: not initialised"));
+ DEBUG(2,("smb_pam_end: PAM: not initialised"));
return False;
}
/*
* Start PAM authentication for specified account
*/
-static BOOL smb_pam_start(pam_handle_t **pamh, char *user, char *rhost)
+
+static BOOL smb_pam_start(pam_handle_t **pamh, const char *user, const char *rhost, struct pam_conv *pconv)
{
int pam_error;
+ const char *our_rhost;
*pamh = (pam_handle_t *)NULL;
- DEBUG(4,("PAM: Init user: %s\n", user));
+ DEBUG(4,("smb_pam_start: PAM: Init user: %s\n", user));
- pam_error = pam_start("samba", user, &smb_pam_conversation, pamh);
+ pam_error = pam_start("samba", user, pconv, pamh);
if( !smb_pam_error_handler(*pamh, pam_error, "Init Failed", 0)) {
*pamh = (pam_handle_t *)NULL;
return False;
}
if (rhost == NULL) {
- rhost = client_name();
+ our_rhost = client_name();
if (strequal(rhost,"UNKNOWN"))
- rhost = client_addr();
+ our_rhost = client_addr();
+ } else {
+ our_rhost = rhost;
}
#ifdef PAM_RHOST
- DEBUG(4,("PAM: setting rhost to: %s\n", rhost));
- pam_error = pam_set_item(*pamh, PAM_RHOST, rhost);
+ DEBUG(4,("smb_pam_start: PAM: setting rhost to: %s\n", our_rhost));
+ pam_error = pam_set_item(*pamh, PAM_RHOST, our_rhost);
if(!smb_pam_error_handler(*pamh, pam_error, "set rhost failed", 0)) {
- smb_pam_end(*pamh);
+ smb_pam_end(*pamh, pconv);
*pamh = (pam_handle_t *)NULL;
return False;
}
#endif
#ifdef PAM_TTY
- DEBUG(4,("PAM: setting tty\n"));
+ DEBUG(4,("smb_pam_start: PAM: setting tty\n"));
pam_error = pam_set_item(*pamh, PAM_TTY, "samba");
if (!smb_pam_error_handler(*pamh, pam_error, "set tty failed", 0)) {
- smb_pam_end(*pamh);
+ smb_pam_end(*pamh, pconv);
*pamh = (pam_handle_t *)NULL;
return False;
}
#endif
- DEBUG(4,("PAM: Init passed for user: %s\n", user));
+ DEBUG(4,("smb_pam_start: PAM: Init passed for user: %s\n", user));
return True;
}
/*
* PAM Authentication Handler
*/
-static BOOL smb_pam_auth(pam_handle_t *pamh, char *user, char *password)
+static NTSTATUS smb_pam_auth(pam_handle_t *pamh, const char *user)
{
int pam_error;
+ NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
/*
* To enable debugging set in /etc/pam.d/samba:
* auth required /lib/security/pam_pwdb.so nullok shadow audit
*/
- DEBUG(4,("PAM: Authenticate User: %s\n", user));
- pam_error = pam_authenticate(pamh, PAM_SILENT); /* Can we authenticate user? */
+ DEBUG(4,("smb_pam_auth: PAM: Authenticate User: %s\n", user));
+ pam_error = pam_authenticate(pamh, PAM_SILENT | lp_null_passwords() ? 0 : PAM_DISALLOW_NULL_AUTHTOK);
switch( pam_error ){
case PAM_AUTH_ERR:
- DEBUG(2, ("PAM: Athentication Error\n"));
+ DEBUG(2, ("smb_pam_auth: PAM: Athentication Error for user %s\n", user));
break;
case PAM_CRED_INSUFFICIENT:
- DEBUG(2, ("PAM: Insufficient Credentials\n"));
+ DEBUG(2, ("smb_pam_auth: PAM: Insufficient Credentials for user %s\n", user));
break;
case PAM_AUTHINFO_UNAVAIL:
- DEBUG(2, ("PAM: Authentication Information Unavailable\n"));
+ DEBUG(2, ("smb_pam_auth: PAM: Authentication Information Unavailable for user %s\n", user));
break;
case PAM_USER_UNKNOWN:
- DEBUG(2, ("PAM: Username NOT known to Authentication system\n"));
+ DEBUG(2, ("smb_pam_auth: PAM: Username %s NOT known to Authentication system\n", user));
break;
case PAM_MAXTRIES:
- DEBUG(2, ("PAM: One or more authentication modules reports user limit exceeeded\n"));
+ DEBUG(2, ("smb_pam_auth: PAM: One or more authentication modules reports user limit for user %s exceeeded\n", user));
break;
case PAM_ABORT:
- DEBUG(0, ("PAM: One or more PAM modules failed to load\n"));
+ DEBUG(0, ("smb_pam_auth: PAM: One or more PAM modules failed to load for user %s\n", user));
+ break;
+ case PAM_SUCCESS:
+ DEBUG(4, ("smb_pam_auth: PAM: User %s Authenticated OK\n", user));
break;
- case PAM_SUCCESS:
- DEBUG(4, ("PAM: User %s Authenticated OK\n", user));
- break;
default:
- DEBUG(0, ("PAM: UNKNOWN ERROR while authenticating user %s\n", user));
- }
- if(!smb_pam_error_handler(pamh, pam_error, "Authentication Failure", 2)) {
- smb_pam_end(pamh);
- return False;
+ DEBUG(0, ("smb_pam_auth: PAM: UNKNOWN ERROR while authenticating user %s\n", user));
+ break;
}
- /* If this point is reached, the user has been authenticated. */
- return (True);
+
+ smb_pam_nt_status_error_handler(pamh, pam_error, "Authentication Failure", 2, &nt_status);
+ return nt_status;
}
/*
* PAM Account Handler
*/
-static BOOL smb_pam_account(pam_handle_t *pamh, char * user, char * password, BOOL pam_auth)
+static NTSTATUS smb_pam_account(pam_handle_t *pamh, const char * user)
{
int pam_error;
+ NTSTATUS nt_status = NT_STATUS_ACCOUNT_DISABLED;
- DEBUG(4,("PAM: Account Management for User: %s\n", user));
+ DEBUG(4,("smb_pam_account: PAM: Account Management for User: %s\n", user));
pam_error = pam_acct_mgmt(pamh, PAM_SILENT); /* Is user account enabled? */
switch( pam_error ) {
case PAM_AUTHTOK_EXPIRED:
- DEBUG(2, ("PAM: User is valid but password is expired\n"));
+ DEBUG(2, ("smb_pam_account: PAM: User %s is valid but password is expired\n", user));
break;
case PAM_ACCT_EXPIRED:
- DEBUG(2, ("PAM: User no longer permitted to access system\n"));
+ DEBUG(2, ("smb_pam_account: PAM: User %s no longer permitted to access system\n", user));
break;
case PAM_AUTH_ERR:
- DEBUG(2, ("PAM: There was an authentication error\n"));
+ DEBUG(2, ("smb_pam_account: PAM: There was an authentication error for user %s\n", user));
break;
case PAM_PERM_DENIED:
- DEBUG(0, ("PAM: User is NOT permitted to access system at this time\n"));
+ DEBUG(0, ("smb_pam_account: PAM: User %s is NOT permitted to access system at this time\n", user));
break;
case PAM_USER_UNKNOWN:
- DEBUG(0, ("PAM: User \"%s\" is NOT known to account management\n", user));
+ DEBUG(0, ("smb_pam_account: PAM: User \"%s\" is NOT known to account management\n", user));
+ break;
+ case PAM_SUCCESS:
+ DEBUG(4, ("smb_pam_account: PAM: Account OK for User: %s\n", user));
break;
- case PAM_SUCCESS:
- DEBUG(4, ("PAM: Account OK for User: %s\n", user));
- break;
default:
- DEBUG(0, ("PAM: UNKNOWN ERROR for User: %s\n", user));
- }
- if(!smb_pam_error_handler(pamh, pam_error, "Account Check Failed", 2)) {
- smb_pam_end(pamh);
- return False;
+ DEBUG(0, ("smb_pam_account: PAM: UNKNOWN PAM ERROR (%d) during Account Management for User: %s\n", pam_error, user));
+ break;
}
- /* Skip the pam_setcred() call if we didn't use pam_authenticate()
- for authentication -- it's an error to call pam_setcred without
- calling pam_authenticate first */
- if (!pam_auth) {
- DEBUG(4, ("PAM: Skipping setcred for user: %s (using encrypted passwords)\n", user));
- return True;
- }
+ smb_pam_nt_status_error_handler(pamh, pam_error, "Account Check Failed", 2, &nt_status);
+ return nt_status;
+}
+
+/*
+ * PAM Credential Setting
+ */
+
+static NTSTATUS smb_pam_setcred(pam_handle_t *pamh, const char * user)
+{
+ int pam_error;
+ NTSTATUS nt_status = NT_STATUS_NO_TOKEN;
/*
* This will allow samba to aquire a kerberos token. And, when
pam_error = pam_setcred(pamh, (PAM_ESTABLISH_CRED|PAM_SILENT));
switch( pam_error ) {
case PAM_CRED_UNAVAIL:
- DEBUG(0, ("PAM: Credentials not found for user:%s", user ));
+ DEBUG(0, ("smb_pam_setcred: PAM: Credentials not found for user:%s\n", user ));
break;
case PAM_CRED_EXPIRED:
- DEBUG(0, ("PAM: Credentials for user: \"%s\" EXPIRED!", user ));
+ DEBUG(0, ("smb_pam_setcred: PAM: Credentials for user: \"%s\" EXPIRED!\n", user ));
break;
case PAM_USER_UNKNOWN:
- DEBUG(0, ("PAM: User: \"%s\" is NOT known so can not set credentials!", user ));
+ DEBUG(0, ("smb_pam_setcred: PAM: User: \"%s\" is NOT known so can not set credentials!\n", user ));
break;
case PAM_CRED_ERR:
- DEBUG(0, ("PAM: Unknown setcredentials error - unable to set credentials for %s", user ));
+ DEBUG(0, ("smb_pam_setcred: PAM: Unknown setcredentials error - unable to set credentials for %s\n", user ));
+ break;
+ case PAM_SUCCESS:
+ DEBUG(4, ("smb_pam_setcred: PAM: SetCredentials OK for User: %s\n", user));
break;
- case PAM_SUCCESS:
- DEBUG(4, ("PAM: SetCredentials OK for User: %s\n", user));
- break;
default:
- DEBUG(0, ("PAM: Error Condition Unknown in pam_setcred function call!"));
- }
- if(!smb_pam_error_handler(pamh, pam_error, "Set Credential Failure", 2)) {
- smb_pam_end(pamh);
- return False;
+ DEBUG(0, ("smb_pam_setcred: PAM: UNKNOWN PAM ERROR (%d) during SetCredentials for User: %s\n", pam_error, user));
+ break;
}
-
- /* If this point is reached, the user has been authenticated. */
- return (True);
-}
+ smb_pam_nt_status_error_handler(pamh, pam_error, "Set Credential Failure", 2, &nt_status);
+ return nt_status;
+}
/*
* PAM Internal Session Handler
*/
-static BOOL smb_internal_pam_session(pam_handle_t *pamh, char *user, char *tty, BOOL flag)
+static BOOL smb_internal_pam_session(pam_handle_t *pamh, const char *user, const char *tty, BOOL flag)
{
int pam_error;
- PAM_password = NULL;
- PAM_username = user;
-
#ifdef PAM_TTY
- DEBUG(4,("PAM: tty set to: %s\n", tty));
+ DEBUG(4,("smb_internal_pam_session: PAM: tty set to: %s\n", tty));
pam_error = pam_set_item(pamh, PAM_TTY, tty);
if (!smb_pam_error_handler(pamh, pam_error, "set tty failed", 0))
return False;
if (!smb_pam_error_handler(pamh, pam_error, "session setup failed", 0))
return False;
} else {
- pam_error = pam_close_session(pamh, PAM_SILENT);
+ pam_setcred(pamh, (PAM_DELETE_CRED|PAM_SILENT)); /* We don't care if this fails */
+ pam_error = pam_close_session(pamh, PAM_SILENT); /* This will probably pick up the error anyway */
if (!smb_pam_error_handler(pamh, pam_error, "session close failed", 0))
return False;
}
return (True);
}
+/*
+ * Internal PAM Password Changer.
+ */
+
+static BOOL smb_pam_chauthtok(pam_handle_t *pamh, const char * user)
+{
+ int pam_error;
+
+ DEBUG(4,("smb_pam_chauthtok: PAM: Password Change for User: %s\n", user));
+
+ pam_error = pam_chauthtok(pamh, PAM_SILENT); /* Change Password */
+
+ switch( pam_error ) {
+ case PAM_AUTHTOK_ERR:
+ DEBUG(2, ("PAM: unable to obtain the new authentication token - is password to weak?\n"));
+ break;
+
+ /* This doesn't seem to be defined on Solaris. JRA */
+#ifdef PAM_AUTHTOK_RECOVER_ERR
+ case PAM_AUTHTOK_RECOVER_ERR:
+ DEBUG(2, ("PAM: unable to obtain the old authentication token - was the old password wrong?.\n"));
+ break;
+#endif
+
+ case PAM_AUTHTOK_LOCK_BUSY:
+ DEBUG(2, ("PAM: unable to change the authentication token since it is currently locked.\n"));
+ break;
+ case PAM_AUTHTOK_DISABLE_AGING:
+ DEBUG(2, ("PAM: Authentication token aging has been disabled.\n"));
+ break;
+ case PAM_PERM_DENIED:
+ DEBUG(0, ("PAM: Permission denied.\n"));
+ break;
+ case PAM_TRY_AGAIN:
+ DEBUG(0, ("PAM: Could not update all authentication token(s). No authentication tokens were updated.\n"));
+ break;
+ case PAM_USER_UNKNOWN:
+ DEBUG(0, ("PAM: User not known to PAM\n"));
+ break;
+ case PAM_SUCCESS:
+ DEBUG(4, ("PAM: Account OK for User: %s\n", user));
+ break;
+ default:
+ DEBUG(0, ("PAM: UNKNOWN PAM ERROR (%d) for User: %s\n", pam_error, user));
+ }
+
+ if(!smb_pam_error_handler(pamh, pam_error, "Password Change Failed", 2)) {
+ return False;
+ }
+
+ /* If this point is reached, the password has changed. */
+ return True;
+}
+
/*
* PAM Externally accessible Session handler
*/
-BOOL smb_pam_session(BOOL flag, const char *in_user, char *tty, char *rhost)
+BOOL smb_pam_claim_session(char *user, char *tty, char *rhost)
{
pam_handle_t *pamh = NULL;
- char * user;
+ struct pam_conv *pconv = NULL;
/* Ignore PAM if told to. */
if (!lp_obey_pam_restrictions())
return True;
- user = strdup(in_user);
- if ( user == NULL ) {
- DEBUG(0, ("PAM: PAM_session Malloc Failed!\n"));
+ if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
return False;
- }
- if (!smb_pam_start(&pamh, user, rhost)) {
+ if (!smb_pam_start(&pamh, user, rhost, pconv))
return False;
- }
- if (!smb_internal_pam_session(pamh, user, tty, flag)) {
- smb_pam_end(pamh);
+ if (!smb_internal_pam_session(pamh, user, tty, True)) {
+ smb_pam_end(pamh, pconv);
return False;
}
- return smb_pam_end(pamh);
+
+ return smb_pam_end(pamh, pconv);
}
/*
- * PAM Externally accessible Account handler
+ * PAM Externally accessible Session handler
*/
-BOOL smb_pam_accountcheck(char * user)
+
+BOOL smb_pam_close_session(char *user, char *tty, char *rhost)
{
pam_handle_t *pamh = NULL;
-
- PAM_username = user;
- PAM_password = NULL;
+ struct pam_conv *pconv = NULL;
/* Ignore PAM if told to. */
if (!lp_obey_pam_restrictions())
return True;
- if( smb_pam_start(&pamh, user, NULL)) {
- if ( smb_pam_account(pamh, user, NULL, False)) {
- return( smb_pam_end(pamh));
- }
+ if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
+ return False;
+
+ if (!smb_pam_start(&pamh, user, rhost, pconv))
+ return False;
+
+ if (!smb_internal_pam_session(pamh, user, tty, False)) {
+ smb_pam_end(pamh, pconv);
+ return False;
}
- DEBUG(0, ("PAM: Account Validation Failed - Rejecting User!\n"));
- return( False );
+
+ return smb_pam_end(pamh, pconv);
}
/*
- * PAM Password Validation Suite
+ * PAM Externally accessible Account handler
*/
-BOOL smb_pam_passcheck(char * user, char * password)
+
+NTSTATUS smb_pam_accountcheck(const char * user)
{
+ NTSTATUS nt_status = NT_STATUS_ACCOUNT_DISABLED;
pam_handle_t *pamh = NULL;
+ struct pam_conv *pconv = NULL;
+
+ /* Ignore PAM if told to. */
+
+ if (!lp_obey_pam_restrictions())
+ return NT_STATUS_OK;
+
+ if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
+ return NT_STATUS_NO_MEMORY;
+
+ if (!smb_pam_start(&pamh, user, NULL, pconv))
+ return NT_STATUS_ACCOUNT_DISABLED;
+
+ if (!NT_STATUS_IS_OK(nt_status = smb_pam_account(pamh, user)))
+ DEBUG(0, ("smb_pam_accountcheck: PAM: Account Validation Failed - Rejecting User %s!\n", user));
+
+ smb_pam_end(pamh, pconv);
+ return nt_status;
+}
+
+/*
+ * PAM Password Validation Suite
+ */
- PAM_username = user;
- PAM_password = password;
+NTSTATUS smb_pam_passcheck(const char * user, const char * password)
+{
+ pam_handle_t *pamh = NULL;
+ NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
+ struct pam_conv *pconv = NULL;
/*
* Note we can't ignore PAM here as this is the only
* compiled --with-pam.
*/
- if( smb_pam_start(&pamh, user, NULL)) {
- if ( smb_pam_auth(pamh, user, password)) {
- if ( smb_pam_account(pamh, user, password, True)) {
- return( smb_pam_end(pamh));
- }
- }
+ if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, password, NULL)) == NULL)
+ return NT_STATUS_LOGON_FAILURE;
+
+ if (!smb_pam_start(&pamh, user, NULL, pconv))
+ return NT_STATUS_LOGON_FAILURE;
+
+ if (!NT_STATUS_IS_OK(nt_status = smb_pam_auth(pamh, user))) {
+ DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User %s !\n", user));
+ smb_pam_end(pamh, pconv);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = smb_pam_account(pamh, user))) {
+ DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_account failed - Rejecting User %s !\n", user));
+ smb_pam_end(pamh, pconv);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = smb_pam_setcred(pamh, user))) {
+ DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_setcred failed - Rejecting User %s !\n", user));
+ smb_pam_end(pamh, pconv);
+ return nt_status;
+ }
+
+ smb_pam_end(pamh, pconv);
+ return nt_status;
+}
+
+/*
+ * PAM Password Change Suite
+ */
+
+BOOL smb_pam_passchange(const char * user, const char * oldpassword, const char * newpassword)
+{
+ /* Appropriate quantities of root should be obtained BEFORE calling this function */
+ struct pam_conv *pconv = NULL;
+ pam_handle_t *pamh = NULL;
+
+ if ((pconv = smb_setup_pam_conv(smb_pam_passchange_conv, user, oldpassword, newpassword)) == NULL)
+ return False;
+
+ if(!smb_pam_start(&pamh, user, NULL, pconv))
+ return False;
+
+ if (!smb_pam_chauthtok(pamh, user)) {
+ DEBUG(0, ("smb_pam_passchange: PAM: Password Change Failed for user %s!\n", user));
+ smb_pam_end(pamh, pconv);
+ return False;
}
- DEBUG(0, ("PAM: System Validation Failed - Rejecting User!\n"));
- return( False );
+
+ return smb_pam_end(pamh, pconv);
}
#else
/* If PAM not used, no PAM restrictions on accounts. */
- BOOL smb_pam_accountcheck(char * user)
+NTSTATUS smb_pam_accountcheck(const char * user)
+{
+ return NT_STATUS_OK;
+}
+
+/* If PAM not used, also no PAM restrictions on sessions. */
+BOOL smb_pam_claim_session(char *user, char *tty, char *rhost)
{
return True;
}
+/* If PAM not used, also no PAM restrictions on sessions. */
+BOOL smb_pam_close_session(char *in_user, char *tty, char *rhost)
+{
+ return True;
+}
#endif /* WITH_PAM */
git.samba.org / gd / samba-autobuild / .git / blobdiff