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-rw-r--r--source3/auth/pampass.c184
1 files changed, 140 insertions, 44 deletions
diff --git a/source3/auth/pampass.c b/source3/auth/pampass.c
index e27e15f24f..53d2a062fd 100644
--- a/source3/auth/pampass.c
+++ b/source3/auth/pampass.c
@@ -71,6 +71,7 @@ static BOOL smb_pam_error_handler(pam_handle_t *pamh, int pam_error, char *msg,
if( pam_error != PAM_SUCCESS) {
DEBUG(dbglvl, ("smb_pam_error_handler: PAM: %s : %s\n",
msg, pam_strerror(pamh, pam_error)));
+
return False;
}
return True;
@@ -130,6 +131,8 @@ static int smb_pam_conv(int 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:
@@ -170,6 +173,82 @@ static int smb_pam_conv(int num_msg,
* 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, char *username, char *oldpass, char *newpass)
+{
+ pstring_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);
+
+ if (!next_token(&p, reply, NULL, sizeof(fstring)))
+ break;
+
+ if (strequal(reply,"."))
+ fstrcpy(reply,"");
+
+ special_char_sub(reply);
+ fstrcpy(t->reply, reply);
+
+ }
+ return list;
+}
+
+static void free_pw_chat(struct chat_struct *list)
+{
+ while (list) {
+ struct chat_struct *old_head = list;
+ DLIST_REMOVE(list, list);
+ free(old_head);
+ }
+}
+
static int smb_pam_passchange_conv(int num_msg,
const struct pam_message **msg,
struct pam_response **resp,
@@ -177,18 +256,22 @@ static int smb_pam_passchange_conv(int num_msg,
{
int replies = 0;
struct pam_response *reply = NULL;
- fstring oldpw_prompt;
- fstring newpw_prompt;
- fstring repeatpw_prompt;
- fstring prompt_ret;
- char *p = lp_passwd_chat();
+ 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.
@@ -196,62 +279,73 @@ static int smb_pam_passchange_conv(int num_msg,
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;
}
- /* Get the prompts. */
-
- if (!next_token(&p, oldpw_prompt, NULL, sizeof(fstring)))
- return PAM_CONV_ERR;
- strlower(oldpw_prompt);
- if (!next_token(&p, newpw_prompt, NULL, sizeof(fstring)))
- return PAM_CONV_ERR;
- strlower(newpw_prompt);
- if (!next_token(&p, repeatpw_prompt, NULL, sizeof(fstring)))
- return PAM_CONV_ERR;
- strlower(repeatpw_prompt);
-
reply = malloc(sizeof(struct pam_response) * num_msg);
- if (!reply)
+ 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: Replied: %s\n", msg[replies]->msg));
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = COPY_STRING(udp->PAM_username);
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: PAM said: %s\n", msg[replies]->msg));
+ fstrcpy(current_prompt, msg[replies]->msg);
+ strlower(current_prompt);
+ for (t=pw_chat; t; t=t->next) {
+ if (ms_fnmatch(t->prompt, current_prompt) == 0) {
+ fstrcpy(current_reply, t->reply);
+ pwd_sub(current_reply, udp->PAM_username, udp->PAM_password, udp->PAM_newpassword);
+ DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: We sent: %s\n", current_reply));
+ reply[replies].resp_retcode = PAM_SUCCESS;
+ reply[replies].resp = COPY_STRING(current_reply);
+ found = True;
+ break;
+ }
+ }
/* PAM frees resp */
- break;
-
- case PAM_PROMPT_ECHO_OFF:
- reply[replies].resp_retcode = PAM_SUCCESS;
- if (!msg[replies]->msg) {
+ 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);
free(reply);
reply = NULL;
return PAM_CONV_ERR;
}
+ break;
- DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: Replied: %s\n", msg[replies]->msg));
-
- fstrcpy(prompt_ret, msg[replies]->msg);
- strlower(prompt_ret);
-
- if (ms_fnmatch( oldpw_prompt, prompt_ret) == 0) {
- reply[replies].resp = COPY_STRING(udp->PAM_password);
- } else if (ms_fnmatch( newpw_prompt, prompt_ret) == 0) {
- reply[replies].resp = COPY_STRING(udp->PAM_newpassword);
- } else if (ms_fnmatch(repeatpw_prompt, prompt_ret) == 0) {
- reply[replies].resp = COPY_STRING(udp->PAM_newpassword);
- } else {
+ 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);
+ strlower(current_prompt);
+ for (t=pw_chat; t; t=t->next) {
+ if (ms_fnmatch(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));
- DEBUG(5,("smb_pam_passchange_conv: Prompts available:\n OldPW: \"%s\"\nNewPW: \"%s\"\n \
-RepeatPW: \"%s\"\n",oldpw_prompt, newpw_prompt,repeatpw_prompt));
+ free_pw_chat(pw_chat);
free(reply);
reply = NULL;
return PAM_CONV_ERR;
}
- /* PAM frees resp */
break;
case PAM_TEXT_INFO:
@@ -262,15 +356,17 @@ RepeatPW: \"%s\"\n",oldpw_prompt, newpw_prompt,repeatpw_prompt));
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = NULL;
break;
-
+
default:
/* Must be an error of some sort... */
+ free_pw_chat(pw_chat);
free(reply);
reply = NULL;
return PAM_CONV_ERR;
}
}
-
+
+ free_pw_chat(pw_chat);
if (reply)
*resp = reply;
return PAM_SUCCESS;
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