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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 1999-2005, 2007, 2010-2015
* Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#ifdef HAVE_SIA_SES_INIT
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include <signal.h>
#include <siad.h>
#include <sudoers.h>
#include "sudo_auth.h"
static int sudo_argc;
static char **sudo_argv;
static char *sudo_tty;
int
sudo_sia_setup(const struct sudoers_context *ctx, struct passwd *pw,
char **promptp, sudo_auth *auth)
{
SIAENTITY *siah;
int i;
debug_decl(sudo_sia_setup, SUDOERS_DEBUG_AUTH);
/* Rebuild argv for sia_ses_init() */
sudo_argc = ctx->runas.argc + 1;
sudo_argv = reallocarray(NULL, sudo_argc + 1, sizeof(char *));
if (sudo_argv == NULL) {
log_warningx(ctx, 0, N_("unable to allocate memory"));
debug_return_int(AUTH_ERROR);
}
sudo_argv[0] = "sudo";
for (i = 0; i < ctx->runas.argc; i++)
sudo_argv[i + 1] = ctx->runas.argv[i];
sudo_argv[sudo_argc] = NULL;
/* We don't let SIA prompt the user for input. */
sudo_tty = ctx->user.ttypath;
if (sia_ses_init(&siah, sudo_argc, sudo_argv, NULL, pw->pw_name, sudo_tty, 0, NULL) != SIASUCCESS) {
log_warning(ctx, 0, N_("unable to initialize SIA session"));
debug_return_int(AUTH_ERROR);
}
auth->data = siah;
debug_return_int(AUTH_SUCCESS);
}
int
sudo_sia_verify(const struct sudoers_context *ctx, struct passwd *pw,
const char *prompt, sudo_auth *auth, struct sudo_conv_callback *callback)
{
SIAENTITY *siah = auth->data;
char *pass;
int rc;
debug_decl(sudo_sia_verify, SUDOERS_DEBUG_AUTH);
if (IS_NONINTERACTIVE(auth))
debug_return_int(AUTH_NONINTERACTIVE);
/* Get password, return AUTH_INTR if we got ^C */
pass = auth_getpass(prompt, SUDO_CONV_PROMPT_ECHO_OFF, callback);
if (pass == NULL)
debug_return_int(AUTH_INTR);
/* Check password and zero out plaintext copy. */
rc = sia_ses_authent(NULL, pass, siah);
freezero(pass, strlen(pass));
if (rc == SIASUCCESS)
debug_return_int(AUTH_SUCCESS);
if (ISSET(rc, SIASTOP))
debug_return_int(AUTH_ERROR);
debug_return_int(AUTH_FAILURE);
}
int
sudo_sia_cleanup(const struct sudoers_context *ctx, struct passwd *pw,
sudo_auth *auth, bool force)
{
SIAENTITY *siah = auth->data;
debug_decl(sudo_sia_cleanup, SUDOERS_DEBUG_AUTH);
(void) sia_ses_release(&siah);
auth->data = NULL;
free(sudo_argv);
debug_return_int(AUTH_SUCCESS);
}
int
sudo_sia_begin_session(const struct sudoers_context *ctx, struct passwd *pw,
char **user_envp[], sudo_auth *auth)
{
SIAENTITY *siah;
int status = AUTH_ERROR;
debug_decl(sudo_sia_begin_session, SUDOERS_DEBUG_AUTH);
/* Re-init sia for the target user's session. */
if (sia_ses_init(&siah, sudo_argc - 1, sudo_argv + 1, NULL, pw->pw_name, sudo_tty, 0, NULL) != SIASUCCESS) {
log_warning(ctx, 0, N_("unable to initialize SIA session"));
goto done;
}
if (sia_make_entity_pwd(pw, siah) != SIASUCCESS) {
sudo_warn("sia_make_entity_pwd");
goto done;
}
status = AUTH_FAILURE; /* no more fatal errors. */
siah->authtype = SIA_A_NONE;
if (sia_ses_estab(sia_collect_trm, siah) != SIASUCCESS) {
sudo_warn("sia_ses_estab");
goto done;
}
if (sia_ses_launch(sia_collect_trm, siah) != SIASUCCESS) {
sudo_warn("sia_ses_launch");
goto done;
}
status = AUTH_SUCCESS;
done:
(void) sia_ses_release(&siah);
debug_return_int(status);
}
#endif /* HAVE_SIA_SES_INIT */
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