126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
|
|
* Conversation related functions
|
|
*/
|
|
|
|
/* $Id */
|
|
/* Copyright at the end of the file */
|
|
|
|
#define _BSD_SOURCE
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <security/pam_modules.h>
|
|
#include <security/_pam_macros.h>
|
|
|
|
#include "pam_userdb.h"
|
|
|
|
/*
|
|
* dummy conversation function sending exactly one prompt
|
|
* and expecting exactly one response from the other party
|
|
*/
|
|
static int converse(pam_handle_t *pamh,
|
|
struct pam_message **message,
|
|
struct pam_response **response)
|
|
{
|
|
int retval;
|
|
const 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,
|
|
response, conv->appdata_ptr);
|
|
|
|
return retval; /* propagate error status */
|
|
}
|
|
|
|
|
|
static char *_pam_delete(register char *xx)
|
|
{
|
|
_pam_overwrite(xx);
|
|
_pam_drop(xx);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This is a conversation function to obtain the user's password
|
|
*/
|
|
int conversation(pam_handle_t *pamh)
|
|
{
|
|
struct pam_message msg[2],*pmsg[2];
|
|
struct pam_response *resp;
|
|
int retval;
|
|
char * token = NULL;
|
|
|
|
pmsg[0] = &msg[0];
|
|
msg[0].msg_style = PAM_PROMPT_ECHO_OFF;
|
|
msg[0].msg = "Password: ";
|
|
|
|
/* so call the conversation expecting i responses */
|
|
resp = NULL;
|
|
retval = converse(pamh, pmsg, &resp);
|
|
|
|
if (resp != NULL) {
|
|
const char * item;
|
|
/* interpret the response */
|
|
if (retval == PAM_SUCCESS) { /* a good conversation */
|
|
token = x_strdup(resp[0].resp);
|
|
if (token == NULL) {
|
|
return PAM_AUTHTOK_RECOVER_ERR;
|
|
}
|
|
}
|
|
|
|
/* set the auth token */
|
|
retval = pam_set_item(pamh, PAM_AUTHTOK, token);
|
|
token = _pam_delete(token); /* clean it up */
|
|
if ( (retval != PAM_SUCCESS) ||
|
|
(retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&item))
|
|
!= PAM_SUCCESS ) {
|
|
return retval;
|
|
}
|
|
|
|
_pam_drop_reply(resp, 1);
|
|
} else {
|
|
retval = (retval == PAM_SUCCESS)
|
|
? PAM_AUTHTOK_RECOVER_ERR:retval ;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Copyright (c) Cristian Gafton <gafton@redhat.com>, 1999
|
|
* All rights reserved
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, and the entire permission notice in its entirety,
|
|
* including the disclaimer of warranties.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* ALTERNATIVELY, this product may be distributed under the terms of
|
|
* the GNU Public License, in which case the provisions of the GPL are
|
|
* required INSTEAD OF the above restrictions. (This clause is
|
|
* necessary due to a potential bad interaction between the GPL and
|
|
* the restrictions contained in a BSD-style copyright.)
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|