Annotation of embedaddon/sudo/plugins/sudoers/auth/fwtk.c, revision 1.1.1.5
1.1 misho 1: /*
1.1.1.4 misho 2: * Copyright (c) 1999-2005, 2008, 2010-2013
1.1 misho 3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
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.
8: *
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.
16: *
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.
20: */
21:
22: #include <config.h>
23:
24: #include <sys/types.h>
25: #include <stdio.h>
26: #ifdef STDC_HEADERS
27: # include <stdlib.h>
28: # include <stddef.h>
29: #else
30: # ifdef HAVE_STDLIB_H
31: # include <stdlib.h>
32: # endif
33: #endif /* STDC_HEADERS */
34: #ifdef HAVE_STRING_H
35: # include <string.h>
36: #endif /* HAVE_STRING_H */
37: #ifdef HAVE_STRINGS_H
38: # include <strings.h>
39: #endif /* HAVE_STRING_H */
40: #ifdef HAVE_UNISTD_H
41: # include <unistd.h>
42: #endif /* HAVE_UNISTD_H */
43: #include <pwd.h>
44:
45: #include <auth.h>
46: #include <firewall.h>
47:
48: #include "sudoers.h"
49: #include "sudo_auth.h"
50:
51: int
1.1.1.2 misho 52: sudo_fwtk_init(struct passwd *pw, sudo_auth *auth)
1.1 misho 53: {
54: static Cfg *confp; /* Configuration entry struct */
55: char resp[128]; /* Response from the server */
1.1.1.2 misho 56: debug_decl(sudo_fwtk_init, SUDO_DEBUG_AUTH)
1.1 misho 57:
58: if ((confp = cfg_read("sudo")) == (Cfg *)-1) {
1.1.1.5 ! misho 59: warningx(U_("unable to read fwtk config"));
1.1.1.2 misho 60: debug_return_int(AUTH_FATAL);
1.1 misho 61: }
62:
63: if (auth_open(confp)) {
1.1.1.5 ! misho 64: warningx(U_("unable to connect to authentication server"));
1.1.1.2 misho 65: debug_return_int(AUTH_FATAL);
1.1 misho 66: }
67:
68: /* Get welcome message from auth server */
69: if (auth_recv(resp, sizeof(resp))) {
1.1.1.5 ! misho 70: warningx(U_("lost connection to authentication server"));
1.1.1.2 misho 71: debug_return_int(AUTH_FATAL);
1.1 misho 72: }
73: if (strncmp(resp, "Authsrv ready", 13) != 0) {
1.1.1.5 ! misho 74: warningx(U_("authentication server error:\n%s"), resp);
1.1.1.2 misho 75: debug_return_int(AUTH_FATAL);
1.1 misho 76: }
77:
1.1.1.2 misho 78: debug_return_int(AUTH_SUCCESS);
1.1 misho 79: }
80:
81: int
1.1.1.2 misho 82: sudo_fwtk_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
1.1 misho 83: {
84: char *pass; /* Password from the user */
1.1.1.4 misho 85: char buf[SUDO_CONV_REPL_MAX + 12]; /* General prupose buffer */
1.1 misho 86: char resp[128]; /* Response from the server */
87: int error;
1.1.1.2 misho 88: debug_decl(sudo_fwtk_verify, SUDO_DEBUG_AUTH)
1.1 misho 89:
90: /* Send username to authentication server. */
91: (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name);
92: restart:
93: if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
1.1.1.5 ! misho 94: warningx(U_("lost connection to authentication server"));
1.1.1.2 misho 95: debug_return_int(AUTH_FATAL);
1.1 misho 96: }
97:
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);
105: }
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));
115: goto restart;
116: } else {
117: warningx("%s", resp);
1.1.1.2 misho 118: debug_return_int(AUTH_FATAL);
1.1 misho 119: }
120: if (!pass) { /* ^C or error */
1.1.1.2 misho 121: debug_return_int(AUTH_INTR);
1.1 misho 122: }
123:
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))) {
1.1.1.5 ! misho 127: warningx(U_("lost connection to authentication server"));
1.1 misho 128: error = AUTH_FATAL;
129: goto done;
130: }
131:
132: if (strncmp(resp, "ok", 2) == 0) {
133: error = AUTH_SUCCESS;
134: goto done;
135: }
136:
137: /* Main loop prints "Permission Denied" or insult. */
138: if (strcmp(resp, "Permission Denied.") != 0)
139: warningx("%s", resp);
140: error = AUTH_FAILURE;
141: done:
1.1.1.4 misho 142: memset_s(pass, SUDO_PASS_MAX, 0, strlen(pass));
143: memset_s(buf, sizeof(buf), 0, sizeof(buf));
1.1.1.2 misho 144: debug_return_int(error);
1.1 misho 145: }
146:
147: int
1.1.1.2 misho 148: sudo_fwtk_cleanup(struct passwd *pw, sudo_auth *auth)
1.1 misho 149: {
1.1.1.2 misho 150: debug_decl(sudo_fwtk_cleanup, SUDO_DEBUG_AUTH)
1.1 misho 151:
152: auth_close();
1.1.1.2 misho 153: debug_return_int(AUTH_SUCCESS);
1.1 misho 154: }
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