2 * Copyright (c) 1999-2005, 2008, 2010-2011
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>
25 #include <sys/param.h>
34 #endif /* STDC_HEADERS */
37 #endif /* HAVE_STRING_H */
40 #endif /* HAVE_STRING_H */
43 #endif /* HAVE_UNISTD_H */
50 #include "sudo_auth.h"
53 fwtk_init(struct passwd *pw, sudo_auth *auth)
55 static Cfg *confp; /* Configuration entry struct */
56 char resp[128]; /* Response from the server */
58 if ((confp = cfg_read("sudo")) == (Cfg *)-1) {
59 warningx(_("unable to read fwtk config"));
63 if (auth_open(confp)) {
64 warningx(_("unable to connect to authentication server"));
68 /* Get welcome message from auth server */
69 if (auth_recv(resp, sizeof(resp))) {
70 warningx(_("lost connection to authentication server"));
73 if (strncmp(resp, "Authsrv ready", 13) != 0) {
74 warningx(_("authentication server error:\n%s"), resp);
82 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 */
89 /* Send username to authentication server. */
90 (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name);
92 if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
93 warningx(_("lost connection to authentication server"));
97 /* Get the password/response from the user. */
98 if (strncmp(resp, "challenge ", 10) == 0) {
99 (void) snprintf(buf, sizeof(buf), "%s\nResponse: ", &resp[10]);
100 pass = auth_getpass(buf, def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_OFF);
101 if (pass && *pass == '\0') {
102 pass = auth_getpass("Response [echo on]: ",
103 def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_ON);
105 } else if (strncmp(resp, "chalnecho ", 10) == 0) {
106 pass = auth_getpass(&resp[10], def_passwd_timeout * 60,
107 SUDO_CONV_PROMPT_ECHO_OFF);
108 } else if (strncmp(resp, "password", 8) == 0) {
109 pass = auth_getpass(prompt, def_passwd_timeout * 60,
110 SUDO_CONV_PROMPT_ECHO_OFF);
111 } else if (strncmp(resp, "display ", 8) == 0) {
112 fprintf(stderr, "%s\n", &resp[8]);
113 strlcpy(buf, "response dummy", sizeof(buf));
116 warningx("%s", resp);
119 if (!pass) { /* ^C or error */
123 /* Send the user's response to the server */
124 (void) snprintf(buf, sizeof(buf), "response '%s'", pass);
125 if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
126 warningx(_("lost connection to authentication server"));
131 if (strncmp(resp, "ok", 2) == 0) {
132 error = AUTH_SUCCESS;
136 /* Main loop prints "Permission Denied" or insult. */
137 if (strcmp(resp, "Permission Denied.") != 0)
138 warningx("%s", resp);
139 error = AUTH_FAILURE;
141 zero_bytes(pass, strlen(pass));
142 zero_bytes(buf, strlen(buf));
147 fwtk_cleanup(struct passwd *pw, sudo_auth *auth)