1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
5 *
6 * THE BSD LICENSE
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
13 * Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 *
17 * Neither the name of the nor the names of its contributors may be
18 * used to endorse or promote products derived from this software without
19 * specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
25 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <strings.h>
35
36 #include "../public/auth.h"
37 #include "../daemon/config.h"
38 #include "../daemon/session.h"
39
40 #include "auth.h"
41
42
43 /* ------------------------------ _uudecode ------------------------------- */
44
45 static const unsigned char pr2six[256] = {
46 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
47 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,62,64,64,64,63,
48 52,53,54,55,56,57,58,59,60,61,64,64,64,64,64,64,64,0,1,2,3,4,5,6,7,8,9,
49 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,64,64,64,64,64,64,26,27,
50 28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
51 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
52 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
53 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
54 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
55 64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,
56 64,64,64,64,64,64,64,64,64,64,64,64,64
57 };
58
59 char *_uudecode(pool_handle_t *pool, char *bufcoded) {
60 register char *bufin = bufcoded;
61 register unsigned char *bufout;
62 register int nprbytes;
63 unsigned char *bufplain;
64 int nbytesdecoded;
65
66 /* Find the length */
67 while(pr2six[(int)*(bufin++)] <= 63);
68 nprbytes = bufin - bufcoded - 1;
69 nbytesdecoded = ((nprbytes+3)/4) * 3;
70
71 bufout = pool_malloc(pool, nbytesdecoded + 1);
72 bufplain = bufout;
73
74 bufin = bufcoded;
75
76 while (nprbytes > 0) {
77 *(bufout++) = (unsigned char)
78 (pr2six[(int)(*bufin)] << 2 | pr2six[(int)bufin[1]] >> 4);
79 *(bufout++) = (unsigned char)
80 (pr2six[(int)bufin[1]] << 4 | pr2six[(int)bufin[2]] >> 2);
81 *(bufout++) = (unsigned char)
82 (pr2six[(int)bufin[2]] << 6 | pr2six[(int)bufin[3]]);
83 bufin += 4;
84 nprbytes -= 4;
85 }
86
87 if(nprbytes & 03) {
88 if(pr2six[(int)bufin[-2]] > 63)
89 nbytesdecoded -= 2;
90 else
91 nbytesdecoded -= 1;
92 }
93 bufplain[nbytesdecoded] = '\0';
94
95 return (char *)bufplain;
96 }
97
98 int basicauth_getuser(Session *sn, Request *rq, char **user, char **pw) {
99 char *auth = NULL;
100 *user = NULL;
101 *pw = NULL;
102 char *u;
103 char *p;
104
105 if(request_header("authorization", &auth, sn, rq) == REQ_ABORTED) {
106 return REQ_ABORTED;
107 }
108
109 if(!auth) {
110 return REQ_NOACTION;
111 }
112
113 /* Skip leading whitespace */
114 while(*auth && (*auth == ' '))
115 ++auth;
116 if(!(*auth)) {
117 protocol_status(sn, rq, PROTOCOL_FORBIDDEN, NULL);
118 return REQ_ABORTED;
119 }
120
121 /* Verify correct type */
122 if((strlen(auth) < 6) || strncasecmp(auth, "basic ", 6)) {
123 return REQ_NOACTION;
124 }
125
126 /* Skip whitespace */
127 auth += 6;
128 while(*auth && (*auth == ' ')) {
129 ++auth;
130 }
131
132 if(!*auth) {
133 return REQ_NOACTION;
134 }
135
136 /* Uuencoded user:password now */
137 if(!(u = _uudecode(sn->pool, auth))) {
138 return REQ_NOACTION;
139 }
140
141 if(!(p = strchr(u, ':'))) {
142 pool_free(sn->pool, u);
143 return REQ_NOACTION;
144 }
145 *p++ = '\0';
146
147 *user = u;
148 *pw = p;
149
150 return REQ_PROCEED;
151 }
152
153 /* ------------------------------ auth_basic ------------------------------ */
154
155 int auth_basic(pblock *param, Session *sn, Request *rq)
156 {
157 char *pwfile, *grpfile, *type, *auth, *user, *pw;
158 char *pwfn, *grpfn;
159 pblock *npb;
160 pb_param *pp;
161 int ret;
162
163 /* Although this is authorization (which is not cacheable) the
164 * check is not actually done until we call require-auth. So
165 * this part is cacheable; require-auth can be cacheable if the
166 * user has limited the auth to only affect a certain set of
167 * paths.
168 */
169 rq->directive_is_cacheable = 1;
170
171 type = pblock_findval("auth-type", param);
172 pwfile = pblock_findval("userdb", param);
173 grpfile = pblock_findval("groupdb", param);
174 pwfn = pblock_findval("userfn", param);
175 grpfn = pblock_findval("groupfn", param);
176
177 if((!type) || (!pwfile) || (!pwfn) || (grpfile && !grpfn)) {
178 log_ereport(LOG_MISCONFIG, "basic-auth: missing parameter");
179 protocol_status(sn, rq, PROTOCOL_SERVER_ERROR, NULL);
180 return REQ_ABORTED;
181 }
182
183 ret = basicauth_getuser(sn, rq, &user, &pw);
184 if(ret != REQ_PROCEED) {
185 return ret;
186 }
187
188 npb = pblock_create(4);
189 pblock_nvinsert("user", user, npb);
190 pblock_nvinsert("pw", pw, npb);
191 pblock_nvinsert("userdb", pwfile, npb);
192 if(grpfile)
193 pblock_nvinsert("groupdb", grpfile, npb);
194 pblock_nvinsert("fn", pwfn, npb);
195
196 if ((ret = func_exec(npb, sn, rq)) != REQ_PROCEED)
197 {
198 goto bye;
199 }
200
201 pblock_nvinsert("auth-type", "basic", rq->vars);
202 pblock_nvinsert("auth-user", user, rq->vars);
203 pblock_nvinsert("auth-db", pwfile, rq->vars);
204 #if defined(XP_WIN32) || defined(MCC_ADMSERV)
205 /* MLM - the admin server needs this password information,
206 * so I'm putting it back */
207 pblock_nvinsert("auth-password", pw, rq->vars);
208 #endif /* XP_WIN32 */
209
210 if(grpfile) {
211 pblock_nvinsert("groupdb", grpfile, npb);
212 pp = pblock_find("fn", npb);
213 free(pp->value);
214 pp->value = strdup(grpfn);
215
216 if( (ret = func_exec(npb, sn, rq)) != REQ_PROCEED )
217 goto bye;
218 }
219 ret = REQ_PROCEED;
220 bye:
221 pblock_free(npb);
222 return ret;
223 }
224
225 int auth_db(pblock *param, Session *sn, Request *rq) {
226 char *db;
227 char *user;
228 char *pw;
229
230 db = pblock_findval("db", param);
231
232 if(!db) {
233 // TODO: log error
234 log_ereport(LOG_MISCONFIG, "basic-auth: missing db parameter");
235 protocol_status(sn, rq, PROTOCOL_SERVER_ERROR, NULL);
236 return REQ_ABORTED;
237 }
238
239 int ret = basicauth_getuser(sn, rq, &user, &pw);
240 if(ret != REQ_PROCEED) {
241 return ret;
242 }
243
244 // get auth db
245 ServerConfiguration *config = session_get_config(sn);
246 sstr_t dbname = sstr(db);
247 AuthDB *authdb = ucx_map_sstr_get(config->authdbs, dbname);
248
249 User *auth_user = authdb->get_user(authdb, user);
250 if(auth_user && !auth_user->verify_password(auth_user, pw)) {
251 fprintf(stderr, "authdb user not authenticated: %s\n", user);
252 free(user);
253 auth_user->free(auth_user);
254 return REQ_NOACTION;
255 }
256
257
258 pblock_nvinsert("auth-type", "basic", rq->vars);
259 pblock_nvinsert("auth-user", user, rq->vars);
260 pblock_nvinsert("auth-db", db, rq->vars);
261
262 if(auth_user) {
263 auth_user->free(auth_user);
264 }
265
266 return REQ_PROCEED;
267 }
268