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-rw-r--r--plugins/sudoers/auth/fwtk.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/plugins/sudoers/auth/fwtk.c b/plugins/sudoers/auth/fwtk.c
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+++ b/plugins/sudoers/auth/fwtk.c
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+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 1999-2005, 2008, 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_FWTK
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pwd.h>
+
+#include <auth.h>
+#include <firewall.h>
+
+#include "sudoers.h"
+#include "sudo_auth.h"
+
+int
+sudo_fwtk_init(struct passwd *pw, sudo_auth *auth)
+{
+ static Cfg *confp; /* Configuration entry struct */
+ char resp[128]; /* Response from the server */
+ debug_decl(sudo_fwtk_init, SUDOERS_DEBUG_AUTH);
+
+ /* Only initialize once. */
+ if (auth->data != NULL)
+ debug_return_int(AUTH_SUCCESS);
+
+ if (IS_NONINTERACTIVE(auth))
+ debug_return_int(AUTH_NONINTERACTIVE);
+
+ if ((confp = cfg_read("sudo")) == (Cfg *)-1) {
+ sudo_warnx("%s", U_("unable to read fwtk config"));
+ debug_return_int(AUTH_FATAL);
+ }
+
+ if (auth_open(confp)) {
+ sudo_warnx("%s", U_("unable to connect to authentication server"));
+ debug_return_int(AUTH_FATAL);
+ }
+
+ /* Get welcome message from auth server */
+ if (auth_recv(resp, sizeof(resp))) {
+ sudo_warnx("%s", U_("lost connection to authentication server"));
+ debug_return_int(AUTH_FATAL);
+ }
+ if (strncmp(resp, "Authsrv ready", 13) != 0) {
+ sudo_warnx(U_("authentication server error:\n%s"), resp);
+ debug_return_int(AUTH_FATAL);
+ }
+ auth->data = (void *) confp;
+
+ debug_return_int(AUTH_SUCCESS);
+}
+
+int
+sudo_fwtk_verify(struct passwd *pw, const char *prompt, sudo_auth *auth, struct sudo_conv_callback *callback)
+{
+ char *pass; /* Password from the user */
+ char buf[SUDO_CONV_REPL_MAX + 12]; /* General prupose buffer */
+ char resp[128]; /* Response from the server */
+ int error;
+ debug_decl(sudo_fwtk_verify, SUDOERS_DEBUG_AUTH);
+
+ /* Send username to authentication server. */
+ (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name);
+restart:
+ if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
+ sudo_warnx("%s", U_("lost connection to authentication server"));
+ debug_return_int(AUTH_FATAL);
+ }
+
+ /* Get the password/response from the user. */
+ if (strncmp(resp, "challenge ", 10) == 0) {
+ (void) snprintf(buf, sizeof(buf), "%s\nResponse: ", &resp[10]);
+ pass = auth_getpass(buf, SUDO_CONV_PROMPT_ECHO_OFF, callback);
+ if (pass && *pass == '\0') {
+ free(pass);
+ pass = auth_getpass("Response [echo on]: ",
+ SUDO_CONV_PROMPT_ECHO_ON, callback);
+ }
+ } else if (strncmp(resp, "chalnecho ", 10) == 0) {
+ pass = auth_getpass(&resp[10], SUDO_CONV_PROMPT_ECHO_OFF, callback);
+ } else if (strncmp(resp, "password", 8) == 0) {
+ pass = auth_getpass(prompt, SUDO_CONV_PROMPT_ECHO_OFF, callback);
+ } else if (strncmp(resp, "display ", 8) == 0) {
+ sudo_printf(SUDO_CONV_INFO_MSG|SUDO_CONV_PREFER_TTY, "%s\n", &resp[8]);
+ strlcpy(buf, "response noop", sizeof(buf));
+ goto restart;
+ } else {
+ sudo_warnx("%s", resp);
+ debug_return_int(AUTH_FATAL);
+ }
+ if (!pass) { /* ^C or error */
+ debug_return_int(AUTH_INTR);
+ }
+
+ /* Send the user's response to the server */
+ (void) snprintf(buf, sizeof(buf), "response '%s'", pass);
+ if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
+ sudo_warnx("%s", U_("lost connection to authentication server"));
+ error = AUTH_FATAL;
+ goto done;
+ }
+
+ if (strncmp(resp, "ok", 2) == 0) {
+ error = AUTH_SUCCESS;
+ goto done;
+ }
+
+ /* Main loop prints "Permission Denied" or insult. */
+ if (strcmp(resp, "Permission Denied.") != 0)
+ sudo_warnx("%s", resp);
+ error = AUTH_FAILURE;
+done:
+ explicit_bzero(buf, sizeof(buf));
+ freezero(pass, strlen(pass));
+ debug_return_int(error);
+}
+
+int
+sudo_fwtk_cleanup(struct passwd *pw, sudo_auth *auth, bool force)
+{
+ debug_decl(sudo_fwtk_cleanup, SUDOERS_DEBUG_AUTH);
+
+ auth_close();
+ debug_return_int(AUTH_SUCCESS);
+}
+
+#endif /* HAVE_FWTK */