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-rw-r--r--auth-skey.c215
-rw-r--r--auth2-skey.c107
2 files changed, 0 insertions, 322 deletions
diff --git a/auth-skey.c b/auth-skey.c
deleted file mode 100644
index 7088b790c..000000000
--- a/auth-skey.c
+++ /dev/null
@@ -1,215 +0,0 @@
1/*
2 * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "includes.h"
26RCSID("$OpenBSD: auth-skey.c,v 1.9 2000/10/19 16:41:13 deraadt Exp $");
27
28#ifdef SKEY
29#include "ssh.h"
30#include "packet.h"
31#include <openssl/sha.h>
32
33/* from %OpenBSD: skeylogin.c,v 1.32 1999/08/16 14:46:56 millert Exp % */
34
35/*
36 * try skey authentication,
37 * return 1 on success, 0 on failure, -1 if skey is not available
38 */
39
40int
41auth_skey_password(struct passwd * pw, const char *password)
42{
43 if (strncasecmp(password, "s/key", 5) == 0) {
44 char *skeyinfo = skey_keyinfo(pw->pw_name);
45 if (skeyinfo == NULL) {
46 debug("generating fake skeyinfo for %.100s.",
47 pw->pw_name);
48 skeyinfo = skey_fake_keyinfo(pw->pw_name);
49 }
50 if (skeyinfo != NULL)
51 packet_send_debug("%s", skeyinfo);
52 /* Try again. */
53 return 0;
54 } else if (skey_haskey(pw->pw_name) == 0 &&
55 skey_passcheck(pw->pw_name, (char *) password) != -1) {
56 /* Authentication succeeded. */
57 return 1;
58 }
59 /* Fall back to ordinary passwd authentication. */
60 return -1;
61}
62
63/* from %OpenBSD: skeylogin.c,v 1.32 1999/08/16 14:46:56 millert Exp % */
64
65#define ROUND(x) (((x)[0] << 24) + (((x)[1]) << 16) + (((x)[2]) << 8) + \
66 ((x)[3]))
67
68/*
69 * hash_collapse()
70 */
71static u_int32_t
72hash_collapse(s)
73 u_char *s;
74{
75 int len, target;
76 u_int32_t i;
77
78 if ((strlen(s) % sizeof(u_int32_t)) == 0)
79 target = strlen(s); /* Multiple of 4 */
80 else
81 target = strlen(s) - (strlen(s) % sizeof(u_int32_t));
82
83 for (i = 0, len = 0; len < target; len += 4)
84 i ^= ROUND(s + len);
85
86 return i;
87}
88
89char *
90skey_fake_keyinfo(char *username)
91{
92 int i;
93 u_int ptr;
94 u_char hseed[SKEY_MAX_SEED_LEN], flg = 1, *up;
95 char pbuf[SKEY_MAX_PW_LEN+1];
96 static char skeyprompt[SKEY_MAX_CHALLENGE+1];
97 char *secret = NULL;
98 size_t secretlen = 0;
99 SHA_CTX ctx;
100 char *p, *u;
101
102 /*
103 * Base first 4 chars of seed on hostname.
104 * Add some filler for short hostnames if necessary.
105 */
106 if (gethostname(pbuf, sizeof(pbuf)) == -1)
107 *(p = pbuf) = '.';
108 else
109 for (p = pbuf; *p && isalnum(*p); p++)
110 if (isalpha(*p) && isupper(*p))
111 *p = tolower(*p);
112 if (*p && pbuf - p < 4)
113 (void)strncpy(p, "asjd", 4 - (pbuf - p));
114 pbuf[4] = '\0';
115
116 /* Hash the username if possible */
117 up = malloc(SHA_DIGEST_LENGTH);
118 if (up != NULL) {
119 struct stat sb;
120 time_t t;
121 int fd;
122
123 SHA1_Init(&ctx);
124 SHA1_Update(&ctx, username, strlen(username));
125 SHA1_Final(up, &ctx);
126
127 /* Collapse the hash */
128 ptr = hash_collapse(up);
129 memset(up, 0, strlen(up));
130
131 /* See if the random file's there, else use ctime */
132 if ((fd = open(_SKEY_RAND_FILE_PATH_, O_RDONLY)) != -1
133 && fstat(fd, &sb) == 0 &&
134 sb.st_size > (off_t)SKEY_MAX_SEED_LEN &&
135 lseek(fd, ptr % (sb.st_size - SKEY_MAX_SEED_LEN),
136 SEEK_SET) != -1 && read(fd, hseed,
137 SKEY_MAX_SEED_LEN) == SKEY_MAX_SEED_LEN) {
138 close(fd);
139 fd = -1;
140 secret = hseed;
141 secretlen = SKEY_MAX_SEED_LEN;
142 flg = 0;
143 } else if (!stat(_PATH_MEM, &sb) || !stat("/", &sb)) {
144 t = sb.st_ctime;
145 secret = ctime(&t);
146 secretlen = strlen(secret);
147 flg = 0;
148 }
149 if (fd != -1)
150 close(fd);
151 }
152
153 /* Put that in your pipe and smoke it */
154 if (flg == 0) {
155 /* Hash secret value with username */
156 SHA1_Init(&ctx);
157 SHA1_Update(&ctx, secret, secretlen);
158 SHA1_Update(&ctx, username, strlen(username));
159 SHA1_Final(up, &ctx);
160
161 /* Zero out */
162 memset(secret, 0, secretlen);
163
164 /* Now hash the hash */
165 SHA1_Init(&ctx);
166 SHA1_Update(&ctx, up, strlen(up));
167 SHA1_Final(up, &ctx);
168
169 ptr = hash_collapse(up + 4);
170
171 for (i = 4; i < 9; i++) {
172 pbuf[i] = (ptr % 10) + '0';
173 ptr /= 10;
174 }
175 pbuf[i] = '\0';
176
177 /* Sequence number */
178 ptr = ((up[2] + up[3]) % 99) + 1;
179
180 memset(up, 0, SHA_DIGEST_LENGTH); /* SHA1 specific */
181 free(up);
182
183 (void)snprintf(skeyprompt, sizeof skeyprompt,
184 "otp-%.*s %d %.*s",
185 SKEY_MAX_HASHNAME_LEN,
186 skey_get_algorithm(),
187 ptr, SKEY_MAX_SEED_LEN,
188 pbuf);
189 } else {
190 /* Base last 8 chars of seed on username */
191 u = username;
192 i = 8;
193 p = &pbuf[4];
194 do {
195 if (*u == 0) {
196 /* Pad remainder with zeros */
197 while (--i >= 0)
198 *p++ = '0';
199 break;
200 }
201
202 *p++ = (*u++ % 10) + '0';
203 } while (--i != 0);
204 pbuf[12] = '\0';
205
206 (void)snprintf(skeyprompt, sizeof skeyprompt,
207 "otp-%.*s %d %.*s",
208 SKEY_MAX_HASHNAME_LEN,
209 skey_get_algorithm(),
210 99, SKEY_MAX_SEED_LEN, pbuf);
211 }
212 return skeyprompt;
213}
214
215#endif /* SKEY */
diff --git a/auth2-skey.c b/auth2-skey.c
deleted file mode 100644
index dbf24f67a..000000000
--- a/auth2-skey.c
+++ /dev/null
@@ -1,107 +0,0 @@
1#include "includes.h"
2RCSID("$OpenBSD: auth2-skey.c,v 1.2 2000/12/19 23:17:55 markus Exp $");
3
4#ifdef SKEY
5#include "ssh.h"
6#include "ssh2.h"
7#include "auth.h"
8#include "packet.h"
9#include "xmalloc.h"
10#include "dispatch.h"
11
12void send_userauth_into_request(Authctxt *authctxt, int echo);
13void input_userauth_info_response(int type, int plen, void *ctxt);
14
15/*
16 * try skey authentication, always return -1 (= postponed) since we have to
17 * wait for the s/key response.
18 */
19int
20auth2_skey(Authctxt *authctxt)
21{
22 send_userauth_into_request(authctxt, 0);
23 dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, &input_userauth_info_response);
24 return -1;
25}
26
27void
28send_userauth_into_request(Authctxt *authctxt, int echo)
29{
30 int retval = -1;
31 struct skey skey;
32 char challenge[SKEY_MAX_CHALLENGE];
33 char *fake;
34
35 if (authctxt->user == NULL)
36 fatal("send_userauth_into_request: internal error: no user");
37
38 /* get skey challenge */
39 if (authctxt->valid)
40 retval = skeychallenge(&skey, authctxt->user, challenge);
41
42 if (retval == -1) {
43 fake = skey_fake_keyinfo(authctxt->user);
44 strlcpy(challenge, fake, sizeof challenge);
45 }
46 /* send our info request */
47 packet_start(SSH2_MSG_USERAUTH_INFO_REQUEST);
48 packet_put_cstring("S/Key Authentication"); /* Name */
49 packet_put_cstring(challenge); /* Instruction */
50 packet_put_cstring(""); /* Language */
51 packet_put_int(1); /* Number of prompts */
52 packet_put_cstring(echo ?
53 "Response [Echo]: ": "Response: "); /* Prompt */
54 packet_put_char(echo); /* Echo */
55 packet_send();
56 packet_write_wait();
57 memset(challenge, 'c', sizeof challenge);
58}
59
60void
61input_userauth_info_response(int type, int plen, void *ctxt)
62{
63 Authctxt *authctxt = ctxt;
64 int authenticated = 0;
65 u_int nresp, rlen;
66 char *resp, *method;
67
68 if (authctxt == NULL)
69 fatal("input_userauth_info_response: no authentication context");
70
71 if (authctxt->attempt++ >= AUTH_FAIL_MAX)
72 packet_disconnect("too many failed userauth_requests");
73
74 nresp = packet_get_int();
75 if (nresp == 1) {
76 /* we only support s/key and assume s/key for nresp == 1 */
77 method = "s/key";
78 resp = packet_get_string(&rlen);
79 packet_done();
80 if (strlen(resp) == 0) {
81 /*
82 * if we received a null response, resend prompt with
83 * echo enabled
84 */
85 authenticated = -1;
86 userauth_log(authctxt, authenticated, method);
87 send_userauth_into_request(authctxt, 1);
88 } else {
89 /* verify skey response */
90 if (authctxt->valid &&
91 skey_haskey(authctxt->pw->pw_name) == 0 &&
92 skey_passcheck(authctxt->pw->pw_name, resp) != -1) {
93 authenticated = 1;
94 } else {
95 authenticated = 0;
96 }
97 memset(resp, 'r', rlen);
98 /* unregister callback */
99 dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, NULL);
100 userauth_log(authctxt, authenticated, method);
101 userauth_reply(authctxt, authenticated);
102 }
103 xfree(resp);
104 }
105}
106
107#endif /* SKEY */
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