1 /*
2 * Copyright (c) 1999 Dug Song. All rights reserved.
3 * Copyright (c) 2002 Markus Friedl. 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
26 #include "includes.h"
27 #include "uuencode.h"
28
29 RCSID("$OpenBSD: radix.c,v 1.22 2002/09/09 14:54:15 markus Exp $");
30
31 #pragma ident "%Z%%M% %I% %E% SMI"
32
33 #ifdef AFS
34 #include <krb.h>
35
36 #include <radix.h>
37 #include "bufaux.h"
38
39 int
40 creds_to_radix(CREDENTIALS *creds, u_char *buf, size_t buflen)
41 {
42 Buffer b;
43 int ret;
44
45 buffer_init(&b);
46
47 buffer_put_char(&b, 1); /* version */
48
49 buffer_append(&b, creds->service, strlen(creds->service));
50 buffer_put_char(&b, '\0');
51 buffer_append(&b, creds->instance, strlen(creds->instance));
52 buffer_put_char(&b, '\0');
53 buffer_append(&b, creds->realm, strlen(creds->realm));
54 buffer_put_char(&b, '\0');
55 buffer_append(&b, creds->pname, strlen(creds->pname));
56 buffer_put_char(&b, '\0');
57 buffer_append(&b, creds->pinst, strlen(creds->pinst));
58 buffer_put_char(&b, '\0');
59
60 /* Null string to repeat the realm. */
61 buffer_put_char(&b, '\0');
62
63 buffer_put_int(&b, creds->issue_date);
64 buffer_put_int(&b, krb_life_to_time(creds->issue_date,
65 creds->lifetime));
66 buffer_append(&b, creds->session, sizeof(creds->session));
67 buffer_put_short(&b, creds->kvno);
68
69 /* 32 bit size + data */
70 buffer_put_string(&b, creds->ticket_st.dat, creds->ticket_st.length);
71
72 ret = uuencode(buffer_ptr(&b), buffer_len(&b), (char *)buf, buflen);
73
74 buffer_free(&b);
75 return ret;
76 }
77
78 #define GETSTRING(b, t, tlen) \
79 do { \
80 int i, found = 0; \
81 for (i = 0; i < tlen; i++) { \
82 if (buffer_len(b) == 0) \
83 goto done; \
84 t[i] = buffer_get_char(b); \
85 if (t[i] == '\0') { \
86 found = 1; \
87 break; \
88 } \
89 } \
90 if (!found) \
91 goto done; \
92 } while(0)
93
94 int
95 radix_to_creds(const char *buf, CREDENTIALS *creds)
96 {
97 Buffer b;
98 u_char *space;
99 char c, version, *p;
100 u_int endTime, len;
101 int blen, ret;
102
103 ret = 0;
104 blen = strlen(buf);
105
106 /* sanity check for size */
107 if (blen > 8192)
108 return 0;
109
110 buffer_init(&b);
111 space = buffer_append_space(&b, blen);
112
113 /* check version and length! */
114 len = uudecode(buf, space, blen);
115 if (len < 1)
116 goto done;
117
118 version = buffer_get_char(&b);
119
120 GETSTRING(&b, creds->service, sizeof creds->service);
121 GETSTRING(&b, creds->instance, sizeof creds->instance);
122 GETSTRING(&b, creds->realm, sizeof creds->realm);
123 GETSTRING(&b, creds->pname, sizeof creds->pname);
124 GETSTRING(&b, creds->pinst, sizeof creds->pinst);
125
126 if (buffer_len(&b) == 0)
127 goto done;
128
129 /* Ignore possibly different realm. */
130 while (buffer_len(&b) > 0 && (c = buffer_get_char(&b)) != '\0')
131 ;
132
133 if (buffer_len(&b) == 0)
134 goto done;
135
136 creds->issue_date = buffer_get_int(&b);
137
138 endTime = buffer_get_int(&b);
139 creds->lifetime = krb_time_to_life(creds->issue_date, endTime);
140
141 len = buffer_len(&b);
142 if (len < sizeof(creds->session))
143 goto done;
144 memcpy(&creds->session, buffer_ptr(&b), sizeof(creds->session));
145 buffer_consume(&b, sizeof(creds->session));
146
147 creds->kvno = buffer_get_short(&b);
148
149 p = buffer_get_string(&b, &len);
150 if (len < 0 || len > sizeof(creds->ticket_st.dat))
151 goto done;
152 memcpy(&creds->ticket_st.dat, p, len);
153 creds->ticket_st.length = len;
154
155 ret = 1;
156 done:
157 buffer_free(&b);
158 return ret;
159 }
160 #endif /* AFS */