2 * Copyright (c) 1999-2005, 2008, 2010-2012
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
24 #include <sys/types.h>
33 #endif /* STDC_HEADERS */
36 #endif /* HAVE_STRING_H */
39 #endif /* HAVE_STRING_H */
42 #endif /* HAVE_UNISTD_H */
49 #include "sudo_auth.h"
52 sudo_fwtk_init(struct passwd *pw, sudo_auth *auth)
54 static Cfg *confp; /* Configuration entry struct */
55 char resp[128]; /* Response from the server */
56 debug_decl(sudo_fwtk_init, SUDO_DEBUG_AUTH)
58 if ((confp = cfg_read("sudo")) == (Cfg *)-1) {
59 warningx(_("unable to read fwtk config"));
60 debug_return_int(AUTH_FATAL);
63 if (auth_open(confp)) {
64 warningx(_("unable to connect to authentication server"));
65 debug_return_int(AUTH_FATAL);
68 /* Get welcome message from auth server */
69 if (auth_recv(resp, sizeof(resp))) {
70 warningx(_("lost connection to authentication server"));
71 debug_return_int(AUTH_FATAL);
73 if (strncmp(resp, "Authsrv ready", 13) != 0) {
74 warningx(_("authentication server error:\n%s"), resp);
75 debug_return_int(AUTH_FATAL);
78 debug_return_int(AUTH_SUCCESS);
82 sudo_fwtk_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
84 char *pass; /* Password from the user */
85 char buf[SUDO_PASS_MAX + 12]; /* General prupose buffer */
86 char resp[128]; /* Response from the server */
88 debug_decl(sudo_fwtk_verify, SUDO_DEBUG_AUTH)
90 /* Send username to authentication server. */
91 (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name);
93 if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
94 warningx(_("lost connection to authentication server"));
95 debug_return_int(AUTH_FATAL);
98 /* Get the password/response from the user. */
99 if (strncmp(resp, "challenge ", 10) == 0) {
100 (void) snprintf(buf, sizeof(buf), "%s\nResponse: ", &resp[10]);
101 pass = auth_getpass(buf, def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_OFF);
102 if (pass && *pass == '\0') {
103 pass = auth_getpass("Response [echo on]: ",
104 def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_ON);
106 } else if (strncmp(resp, "chalnecho ", 10) == 0) {
107 pass = auth_getpass(&resp[10], def_passwd_timeout * 60,
108 SUDO_CONV_PROMPT_ECHO_OFF);
109 } else if (strncmp(resp, "password", 8) == 0) {
110 pass = auth_getpass(prompt, def_passwd_timeout * 60,
111 SUDO_CONV_PROMPT_ECHO_OFF);
112 } else if (strncmp(resp, "display ", 8) == 0) {
113 fprintf(stderr, "%s\n", &resp[8]);
114 strlcpy(buf, "response dummy", sizeof(buf));
117 warningx("%s", resp);
118 debug_return_int(AUTH_FATAL);
120 if (!pass) { /* ^C or error */
121 debug_return_int(AUTH_INTR);
124 /* Send the user's response to the server */
125 (void) snprintf(buf, sizeof(buf), "response '%s'", pass);
126 if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
127 warningx(_("lost connection to authentication server"));
132 if (strncmp(resp, "ok", 2) == 0) {
133 error = AUTH_SUCCESS;
137 /* Main loop prints "Permission Denied" or insult. */
138 if (strcmp(resp, "Permission Denied.") != 0)
139 warningx("%s", resp);
140 error = AUTH_FAILURE;
142 zero_bytes(pass, strlen(pass));
143 zero_bytes(buf, strlen(buf));
144 debug_return_int(error);
148 sudo_fwtk_cleanup(struct passwd *pw, sudo_auth *auth)
150 debug_decl(sudo_fwtk_cleanup, SUDO_DEBUG_AUTH)
153 debug_return_int(AUTH_SUCCESS);