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pam_get_pass.c
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pam_get_pass.c
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/*
* Copyright (c) 2000. Leon Breedt, Copyright (c) 2002 David D.W. Downey
* Adapted FreeBSD version
*/
/*-
* Copyright 1998 Juniper Networks, Inc.
* 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, this list of conditions and the following disclaimer.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD: src/lib/libpam/libpam/pam_get_pass.c,v 1.1.1.1 1998/11/18 01:44:37 jdp Exp $
*/
/* $Id: pam_get_pass.c,v 1.2 2003/06/20 10:34:16 ek Exp $ */
#include <stdlib.h>
#include <string.h>
/* pam_appl.h required for pam_modules.h on Illumos/Solaris */
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include "pam_mod_misc.h"
static int pam_conv_pass(pam_handle_t *, const char *, int);
static int pam_conv_pass(pam_handle_t * pamh, const char *prompt, int options)
{
int retval;
const void *item;
const struct pam_conv *conv;
struct pam_message msg;
const struct pam_message *msgs[1];
struct pam_response *resp;
if ((retval = pam_get_item(pamh, PAM_CONV, &item)) != PAM_SUCCESS)
return retval;
conv = (const struct pam_conv *)item;
msg.msg_style = options & PAM_OPT_ECHO_PASS ?
PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF;
msg.msg = prompt;
msgs[0] = &msg;
if ((retval = conv->conv(1, msgs, &resp, conv->appdata_ptr)) !=
PAM_SUCCESS)
return retval;
if ((retval = pam_set_item(pamh, PAM_AUTHTOK, resp[0].resp)) !=
PAM_SUCCESS)
return retval;
memset(resp[0].resp, 0, strlen(resp[0].resp));
free(resp[0].resp);
free(resp);
return PAM_SUCCESS;
}
int
pam_get_pass(pam_handle_t * pamh, const char **passp, const char *prompt,
int options)
{
int retval;
const void *item = NULL;
/*
* Grab the already-entered password if we might want to use it.
*/
if (options & (PAM_OPT_TRY_FIRST_PASS | PAM_OPT_USE_FIRST_PASS)) {
if ((retval = pam_get_item(pamh, PAM_AUTHTOK, &item)) !=
PAM_SUCCESS)
return retval;
}
if (item == NULL) {
/* The user hasn't entered a password yet. */
if (options & PAM_OPT_USE_FIRST_PASS)
return PAM_AUTH_ERR;
/* Use the conversation function to get a password. */
if ((retval = pam_conv_pass(pamh, prompt, options)) !=
PAM_SUCCESS ||
(retval = pam_get_item(pamh, PAM_AUTHTOK, &item)) !=
PAM_SUCCESS)
return retval;
}
*passp = (const char *)item;
return PAM_SUCCESS;
}
int
pam_get_confirm_pass(pam_handle_t * pamh, const char **passp,
const char *prompt1, const char *prompt2, int options)
{
int retval, i;
const void *item = NULL;
const struct pam_conv *conv;
struct pam_message msgs[2];
const struct pam_message *pmsgs[2];
struct pam_response *resp;
if ((retval = pam_get_item(pamh, PAM_CONV, &item)) != PAM_SUCCESS)
return retval;
conv = (const struct pam_conv *)item;
for (i = 0; i < 2; i++)
msgs[i].msg_style = options & PAM_OPT_ECHO_PASS ?
PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF;
msgs[0].msg = prompt1;
msgs[1].msg = prompt2;
pmsgs[0] = &msgs[0];
pmsgs[1] = &msgs[1];
if ((retval =
conv->conv(2, pmsgs, &resp, conv->appdata_ptr)) != PAM_SUCCESS)
return retval;
if (!resp)
return PAM_AUTHTOK_RECOVERY_ERR;
if (strcmp(resp[0].resp, resp[1].resp) != 0)
return PAM_AUTHTOK_RECOVERY_ERR;
retval = pam_set_item(pamh, PAM_AUTHTOK, resp[0].resp);
memset(resp[0].resp, 0, strlen(resp[0].resp));
memset(resp[1].resp, 0, strlen(resp[1].resp));
free(resp[0].resp);
free(resp[1].resp);
free(resp);
if (retval == PAM_SUCCESS) {
item = NULL;
retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&item);
*passp = item;
}
return retval;
}