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1 | /* | |
2 | * Copyright (c) 1999 Dug Song. 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" | |
26 | #include "uuencode.h" | |
27 | ||
28 | RCSID("$OpenBSD: radix.c,v 1.17 2001/11/19 19:02:16 mpech Exp $"); | |
29 | ||
30 | #ifdef AFS | |
31 | #include <krb.h> | |
32 | ||
33 | #include <radix.h> | |
34 | ||
35 | typedef u_char my_u_char; | |
36 | typedef u_int my_u_int32_t; | |
37 | typedef u_short my_u_short; | |
38 | ||
39 | /* Nasty macros from BIND-4.9.2 */ | |
40 | ||
41 | #define GETSHORT(s, cp) { \ | |
42 | my_u_char *t_cp = (my_u_char *)(cp); \ | |
43 | (s) = (((my_u_short)t_cp[0]) << 8) \ | |
44 | | (((my_u_short)t_cp[1])) \ | |
45 | ; \ | |
46 | (cp) += 2; \ | |
47 | } | |
48 | ||
49 | #define GETLONG(l, cp) { \ | |
50 | my_u_char *t_cp = (my_u_char *)(cp); \ | |
51 | (l) = (((my_u_int32_t)t_cp[0]) << 24) \ | |
52 | | (((my_u_int32_t)t_cp[1]) << 16) \ | |
53 | | (((my_u_int32_t)t_cp[2]) << 8) \ | |
54 | | (((my_u_int32_t)t_cp[3])) \ | |
55 | ; \ | |
56 | (cp) += 4; \ | |
57 | } | |
58 | ||
59 | #define PUTSHORT(s, cp) { \ | |
60 | my_u_short t_s = (my_u_short)(s); \ | |
61 | my_u_char *t_cp = (my_u_char *)(cp); \ | |
62 | *t_cp++ = t_s >> 8; \ | |
63 | *t_cp = t_s; \ | |
64 | (cp) += 2; \ | |
65 | } | |
66 | ||
67 | #define PUTLONG(l, cp) { \ | |
68 | my_u_int32_t t_l = (my_u_int32_t)(l); \ | |
69 | my_u_char *t_cp = (my_u_char *)(cp); \ | |
70 | *t_cp++ = t_l >> 24; \ | |
71 | *t_cp++ = t_l >> 16; \ | |
72 | *t_cp++ = t_l >> 8; \ | |
73 | *t_cp = t_l; \ | |
74 | (cp) += 4; \ | |
75 | } | |
76 | ||
77 | #define GETSTRING(s, p, p_l) { \ | |
78 | char *p_targ = (p) + p_l; \ | |
79 | char *s_c = (s); \ | |
80 | char *p_c = (p); \ | |
81 | while (*p_c && (p_c < p_targ)) { \ | |
82 | *s_c++ = *p_c++; \ | |
83 | } \ | |
84 | if (p_c == p_targ) { \ | |
85 | return 1; \ | |
86 | } \ | |
87 | *s_c = *p_c++; \ | |
88 | (p_l) = (p_l) - (p_c - (p)); \ | |
89 | (p) = p_c; \ | |
90 | } | |
91 | ||
92 | ||
93 | int | |
94 | creds_to_radix(CREDENTIALS *creds, u_char *buf, size_t buflen) | |
95 | { | |
96 | char *p, *s; | |
97 | int len; | |
98 | char temp[2048]; | |
99 | ||
100 | p = temp; | |
101 | *p++ = 1; /* version */ | |
102 | s = creds->service; | |
103 | while (*s) | |
104 | *p++ = *s++; | |
105 | *p++ = *s; | |
106 | s = creds->instance; | |
107 | while (*s) | |
108 | *p++ = *s++; | |
109 | *p++ = *s; | |
110 | s = creds->realm; | |
111 | while (*s) | |
112 | *p++ = *s++; | |
113 | *p++ = *s; | |
114 | ||
115 | s = creds->pname; | |
116 | while (*s) | |
117 | *p++ = *s++; | |
118 | *p++ = *s; | |
119 | s = creds->pinst; | |
120 | while (*s) | |
121 | *p++ = *s++; | |
122 | *p++ = *s; | |
123 | /* Null string to repeat the realm. */ | |
124 | *p++ = '\0'; | |
125 | ||
126 | PUTLONG(creds->issue_date, p); | |
127 | { | |
128 | u_int endTime; | |
129 | endTime = (u_int) krb_life_to_time(creds->issue_date, | |
130 | creds->lifetime); | |
131 | PUTLONG(endTime, p); | |
132 | } | |
133 | ||
134 | memcpy(p, &creds->session, sizeof(creds->session)); | |
135 | p += sizeof(creds->session); | |
136 | ||
137 | PUTSHORT(creds->kvno, p); | |
138 | PUTLONG(creds->ticket_st.length, p); | |
139 | ||
140 | memcpy(p, creds->ticket_st.dat, creds->ticket_st.length); | |
141 | p += creds->ticket_st.length; | |
142 | len = p - temp; | |
143 | ||
144 | return (uuencode((u_char *)temp, len, (char *)buf, buflen)); | |
145 | } | |
146 | ||
147 | int | |
148 | radix_to_creds(const char *buf, CREDENTIALS *creds) | |
149 | { | |
150 | ||
151 | char *p; | |
152 | int len, tl; | |
153 | char version; | |
154 | char temp[2048]; | |
155 | ||
156 | len = uudecode(buf, (u_char *)temp, sizeof(temp)); | |
157 | if (len < 0) | |
158 | return 0; | |
159 | ||
160 | p = temp; | |
161 | ||
162 | /* check version and length! */ | |
163 | if (len < 1) | |
164 | return 0; | |
165 | version = *p; | |
166 | p++; | |
167 | len--; | |
168 | ||
169 | GETSTRING(creds->service, p, len); | |
170 | GETSTRING(creds->instance, p, len); | |
171 | GETSTRING(creds->realm, p, len); | |
172 | ||
173 | GETSTRING(creds->pname, p, len); | |
174 | GETSTRING(creds->pinst, p, len); | |
175 | /* Ignore possibly different realm. */ | |
176 | while (*p && len) | |
177 | p++, len--; | |
178 | if (len == 0) | |
179 | return 0; | |
180 | p++, len--; | |
181 | ||
182 | /* Enough space for remaining fixed-length parts? */ | |
183 | if (len < (4 + 4 + sizeof(creds->session) + 2 + 4)) | |
184 | return 0; | |
185 | ||
186 | GETLONG(creds->issue_date, p); | |
187 | len -= 4; | |
188 | { | |
189 | u_int endTime; | |
190 | GETLONG(endTime, p); | |
191 | len -= 4; | |
192 | creds->lifetime = krb_time_to_life(creds->issue_date, endTime); | |
193 | } | |
194 | ||
195 | memcpy(&creds->session, p, sizeof(creds->session)); | |
196 | p += sizeof(creds->session); | |
197 | len -= sizeof(creds->session); | |
198 | ||
199 | GETSHORT(creds->kvno, p); | |
200 | len -= 2; | |
201 | GETLONG(creds->ticket_st.length, p); | |
202 | len -= 4; | |
203 | ||
204 | tl = creds->ticket_st.length; | |
205 | if (tl < 0 || tl > len || tl > sizeof(creds->ticket_st.dat)) | |
206 | return 0; | |
207 | ||
208 | memcpy(creds->ticket_st.dat, p, tl); | |
209 | p += tl; | |
210 | len -= tl; | |
211 | ||
212 | return 1; | |
213 | } | |
214 | #endif /* AFS */ |