1 /*-
2 * Copyright (c) 2010 Alistair Crooks <agc@NetBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #include <sys/types.h>
26
27 #include <netdb.h>
28
29 #include <netpgp.h>
30 #include <regex.h>
31 #include <sha1.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <time.h>
36 #include <unistd.h>
37
38 #include "libpaa.h"
39
40 #define DEFAULT_HASH_ALG "SHA256"
41
42 int
main(int argc,char ** argv)43 main(int argc, char **argv)
44 {
45 paa_server_info_t server;
46 paa_challenge_t challenge;
47 paa_identity_t id;
48 netpgp_t netpgp;
49 char buf[2048];
50 int secretc;
51 int cc;
52 int i;
53
54 (void) memset(&server, 0x0, sizeof(server));
55 (void) memset(&challenge, 0x0, sizeof(challenge));
56 (void) memset(&id, 0x0, sizeof(id));
57 (void) memset(&netpgp, 0x0, sizeof(netpgp));
58 secretc = 64;
59 while ((i = getopt(argc, argv, "S:c:d:r:u:")) != -1) {
60 switch(i) {
61 case 'S':
62 netpgp_setvar(&netpgp, "ssh keys", "1");
63 netpgp_setvar(&netpgp, "sshkeyfile", optarg);
64 break;
65 case 'c':
66 secretc = atoi(optarg);
67 break;
68 case 'd':
69 challenge.domain = optarg;
70 break;
71 case 'r':
72 challenge.realm = optarg;
73 break;
74 case 'u':
75 netpgp_setvar(&netpgp, "userid", optarg);
76 break;
77 }
78 }
79 netpgp_setvar(&netpgp, "hash", DEFAULT_HASH_ALG);
80 netpgp_setvar(&netpgp, "need seckey", "1");
81 netpgp_setvar(&netpgp, "need userid", "1");
82 netpgp_set_homedir(&netpgp, getenv("HOME"),
83 netpgp_getvar(&netpgp, "ssh keys") ? "/.ssh" : "/.gnupg", 1);
84 if (!netpgp_init(&netpgp)) {
85 (void) fprintf(stderr, "can't initialise netpgp\n");
86 exit(EXIT_FAILURE);
87 }
88 if (!paa_server_init(&server, secretc)) {
89 (void) fprintf(stderr, "can't initialise paa server\n");
90 exit(EXIT_FAILURE);
91 }
92 /* format the challenge */
93 cc = paa_format_challenge(&challenge, &server, buf, sizeof(buf));
94 /* write challenge to temp file */
95 paa_write_file("challenge", buf, cc);
96 /* get the client to authenticate via paa, writing to temp response file */
97 system("client/paaclient -r authentication@bigco.com < challenge > response");
98 /* read in response */
99 cc = paa_read_file("response", buf, sizeof(buf));
100 if (!paa_check_response(&challenge, &id, &netpgp, buf)) {
101 (void) fprintf(stderr, "server: paa_check failed\n");
102 exit(EXIT_FAILURE);
103 }
104 printf("paa_check_response verified challenge: signature authenticated:\n");
105 paa_print_identity(stdout, &id);
106 printf("Changing buf[%d] from '%c' to '%c'\n", cc / 2, buf[cc / 2], buf[cc / 2] - 1);
107 buf[cc / 2] = buf[cc / 2] - 1;
108 if (paa_check_response(&challenge, &id, &netpgp, buf)) {
109 (void) fprintf(stderr, "server: unexpected paa_check pass\n");
110 exit(EXIT_FAILURE);
111 }
112 printf("paa_check_response verified challenge: signature not authenticated:\n");
113 exit(EXIT_SUCCESS);
114 }
115