mirror of https://github.com/sudo-project/sudo.git
238 lines
6.6 KiB
C
238 lines
6.6 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 1999-2005, 2007, 2010-2012, 2014-2016
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* Todd C. Miller <Todd.Miller@sudo.ws>
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* Copyright (c) 2002 Michael Stroucken <michael@stroucken.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#ifdef HAVE_SECURID
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <pwd.h>
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/* Needed for SecurID v5.0 Authentication on UNIX */
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#define UNIX 1
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#include <acexport.h>
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#include <sdacmvls.h>
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#include <sudoers.h>
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#include "sudo_auth.h"
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/*
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* securid_init - Initialises communications with ACE server
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* Arguments in:
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* pw - UNUSED
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* auth - sudo authentication structure
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*
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* Results out:
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* auth - auth->data contains pointer to new SecurID handle
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* return code - Fatal if initialization unsuccessful, otherwise
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* success.
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*/
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int
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sudo_securid_init(const struct sudoers_context *ctx, struct passwd *pw,
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sudo_auth *auth)
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{
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static SDI_HANDLE sd_dat; /* SecurID handle */
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debug_decl(sudo_securid_init, SUDOERS_DEBUG_AUTH);
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/* Only initialize once. */
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if (auth->data != NULL)
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debug_return_int(AUTH_SUCCESS);
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if (IS_NONINTERACTIVE(auth))
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debug_return_int(AUTH_NONINTERACTIVE);
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/* Start communications */
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if (AceInitialize() == SD_FALSE) {
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sudo_warnx("%s", U_("failed to initialise the ACE API library"));
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debug_return_int(AUTH_ERROR);
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}
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auth->data = (void *) &sd_dat; /* For method-specific data */
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debug_return_int(AUTH_SUCCESS);
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}
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/*
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* securid_setup - Initialises a SecurID transaction and locks out other
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* ACE servers
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*
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* Arguments in:
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* pw - struct passwd for username
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* promptp - UNUSED
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* auth - sudo authentication structure for SecurID handle
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*
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* Results out:
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* return code - Success if transaction started correctly, fatal
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* otherwise
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*/
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int
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sudo_securid_setup(const struct sudoers_context *ctx, struct passwd *pw,
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char **promptp, sudo_auth *auth)
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{
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SDI_HANDLE *sd = (SDI_HANDLE *) auth->data;
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int retval;
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debug_decl(sudo_securid_setup, SUDOERS_DEBUG_AUTH);
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/* Re-initialize SecurID every time. */
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if (SD_Init(sd) != ACM_OK) {
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sudo_warnx("%s", U_("unable to contact the SecurID server"));
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debug_return_int(AUTH_ERROR);
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}
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/* Lock new PIN code */
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retval = SD_Lock(*sd, pw->pw_name);
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switch (retval) {
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case ACM_OK:
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sudo_warnx("%s", U_("User ID locked for SecurID Authentication"));
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debug_return_int(AUTH_SUCCESS);
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case ACE_UNDEFINED_USERNAME:
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sudo_warnx("%s", U_("invalid username length for SecurID"));
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debug_return_int(AUTH_ERROR);
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case ACE_ERR_INVALID_HANDLE:
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sudo_warnx("%s", U_("invalid Authentication Handle for SecurID"));
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debug_return_int(AUTH_ERROR);
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case ACM_ACCESS_DENIED:
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sudo_warnx("%s", U_("SecurID communication failed"));
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debug_return_int(AUTH_ERROR);
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default:
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sudo_warnx("%s", U_("unknown SecurID error"));
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debug_return_int(AUTH_ERROR);
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}
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}
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/*
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* securid_verify - Authenticates user and handles ACE responses
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*
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* Arguments in:
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* pw - struct passwd for username
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* prompt - UNUSED
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* auth - sudo authentication structure for SecurID handle
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*
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* Results out:
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* return code - Success on successful authentication, failure on
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* incorrect authentication, fatal on errors
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*/
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int
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sudo_securid_verify(const struct sudoers_context *ctx, struct passwd *pw,
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const char *promp, sudo_auth *auth, struct sudo_conv_callback *callback)
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{
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SDI_HANDLE *sd = (SDI_HANDLE *) auth->data;
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char *pass;
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int ret;
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debug_decl(sudo_securid_verify, SUDOERS_DEBUG_AUTH);
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pass = auth_getpass("Enter your PASSCODE: ", SUDO_CONV_PROMPT_ECHO_OFF,
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callback);
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/* Have ACE verify password */
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switch (SD_Check(*sd, pass, pw->pw_name)) {
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case ACM_OK:
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ret = AUTH_SUCESS;
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break;
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case ACE_UNDEFINED_PASSCODE:
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sudo_warnx("%s", U_("invalid passcode length for SecurID"));
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ret = AUTH_ERROR;
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break;
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case ACE_UNDEFINED_USERNAME:
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sudo_warnx("%s", U_("invalid username length for SecurID"));
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ret = AUTH_ERROR;
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break;
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case ACE_ERR_INVALID_HANDLE:
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sudo_warnx("%s", U_("invalid Authentication Handle for SecurID"));
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ret = AUTH_ERROR;
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break;
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case ACM_ACCESS_DENIED:
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ret = AUTH_FAILURE;
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break;
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case ACM_NEXT_CODE_REQUIRED:
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/* Sometimes (when current token close to expire?)
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ACE challenges for the next token displayed
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(entered without the PIN) */
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if (pass != NULL)
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freezero(pass, strlen(pass));
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pass = auth_getpass("\
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!!! ATTENTION !!!\n\
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Wait for the token code to change, \n\
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then enter the new token code.\n", \
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SUDO_CONV_PROMPT_ECHO_OFF, callback);
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if (SD_Next(*sd, pass) == ACM_OK) {
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ret = AUTH_SUCCESS;
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break;
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}
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ret = AUTH_FAILURE;
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break;
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case ACM_NEW_PIN_REQUIRED:
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/*
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* This user's SecurID has not been activated yet,
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* or the pin has been reset
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*/
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/* XXX - Is setting up a new PIN within sudo's scope? */
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SD_Pin(*sd, "");
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sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY,
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"Your SecurID access has not yet been set up.\n");
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sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY,
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"Please set up a PIN before you try to authenticate.\n");
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ret = AUTH_ERROR;
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break;
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default:
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sudo_warnx("%s", U_("unknown SecurID error"));
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ret = AUTH_ERROR;
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break;
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}
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/* Free resources */
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SD_Close(*sd);
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if (pass != NULL)
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freezero(pass, strlen(pass));
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/* Return stored state to calling process */
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debug_return_int(ret);
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}
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#endif /* HAVE_SECURID */
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