radlib.c (1ee774f614e70c52baafdf8b7e9013b545d36f2b) radlib.c (082bfe6741360907d0bfad91e4e836e02c361395)
1/*-
2 * Copyright 1998 Juniper Networks, Inc.
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

--- 8 unchanged lines hidden (view full) ---

17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
1/*-
2 * Copyright 1998 Juniper Networks, Inc.
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

--- 8 unchanged lines hidden (view full) ---

17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
25 */
26
27 */
28
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/types.h>
31#include <sys/socket.h>
32#include <sys/time.h>
33#include <netinet/in.h>
34#include <arpa/inet.h>
29#include <sys/types.h>
30#include <sys/socket.h>
31#include <sys/time.h>
32#include <netinet/in.h>
33#include <arpa/inet.h>
35#ifdef WITH_SSL
36#include <openssl/hmac.h>
37#include <openssl/md5.h>
38#define MD5Init MD5_Init
39#define MD5Update MD5_Update
40#define MD5Final MD5_Final
41#else
42#define MD5_DIGEST_LENGTH 16
43#include <md5.h>
44#endif
45
34
46/* We need the MPPE_KEY_LEN define */
47#include <netgraph/ng_mppc.h>
48
49#include <errno.h>
35#include <errno.h>
36#include <md5.h>
50#include <netdb.h>
51#include <stdarg.h>
52#include <stddef.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "radlib_private.h"
59
60static void clear_password(struct rad_handle *);
61static void generr(struct rad_handle *, const char *, ...)
62 __printflike(2, 3);
63static void insert_scrambled_password(struct rad_handle *, int);
37#include <netdb.h>
38#include <stdarg.h>
39#include <stddef.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45#include "radlib_private.h"
46
47static void clear_password(struct rad_handle *);
48static void generr(struct rad_handle *, const char *, ...)
49 __printflike(2, 3);
50static void insert_scrambled_password(struct rad_handle *, int);
64static void insert_request_authenticator(struct rad_handle *, int);
65static void insert_message_authenticator(struct rad_handle *, int);
66static int is_valid_response(struct rad_handle *, int,
67 const struct sockaddr_in *);
68static int put_password_attr(struct rad_handle *, int,
69 const void *, size_t);
70static int put_raw_attr(struct rad_handle *, int,
71 const void *, size_t);
72static int split(char *, char *[], int, char *, size_t);
73
74static void
75clear_password(struct rad_handle *h)
76{
77 if (h->pass_len != 0) {
78 memset(h->pass, 0, h->pass_len);
79 h->pass_len = 0;
51static int is_valid_response(struct rad_handle *, int,
52 const struct sockaddr_in *);
53static int put_password_attr(struct rad_handle *, int,
54 const void *, size_t);
55static int put_raw_attr(struct rad_handle *, int,
56 const void *, size_t);
57static int split(char *, char *[], int, char *, size_t);
58
59static void
60clear_password(struct rad_handle *h)
61{
62 if (h->pass_len != 0) {
63 memset(h->pass, 0, h->pass_len);
64 h->pass_len = 0;
65 h->pass_pos = 0;
80 }
66 }
81 h->pass_pos = 0;
82}
83
84static void
85generr(struct rad_handle *h, const char *format, ...)
86{
87 va_list ap;
88
89 va_start(ap, format);
90 vsnprintf(h->errmsg, ERRSIZE, format, ap);
91 va_end(ap);
92}
93
94static void
95insert_scrambled_password(struct rad_handle *h, int srv)
96{
97 MD5_CTX ctx;
67}
68
69static void
70generr(struct rad_handle *h, const char *format, ...)
71{
72 va_list ap;
73
74 va_start(ap, format);
75 vsnprintf(h->errmsg, ERRSIZE, format, ap);
76 va_end(ap);
77}
78
79static void
80insert_scrambled_password(struct rad_handle *h, int srv)
81{
82 MD5_CTX ctx;
98 unsigned char md5[MD5_DIGEST_LENGTH];
83 unsigned char md5[16];
99 const struct rad_server *srvp;
100 int padded_len;
101 int pos;
102
103 srvp = &h->servers[srv];
104 padded_len = h->pass_len == 0 ? 16 : (h->pass_len+15) & ~0xf;
105
84 const struct rad_server *srvp;
85 int padded_len;
86 int pos;
87
88 srvp = &h->servers[srv];
89 padded_len = h->pass_len == 0 ? 16 : (h->pass_len+15) & ~0xf;
90
106 memcpy(md5, &h->out[POS_AUTH], LEN_AUTH);
91 memcpy(md5, &h->request[POS_AUTH], LEN_AUTH);
107 for (pos = 0; pos < padded_len; pos += 16) {
108 int i;
109
110 /* Calculate the new scrambler */
111 MD5Init(&ctx);
112 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
113 MD5Update(&ctx, md5, 16);
114 MD5Final(md5, &ctx);
115
116 /*
117 * Mix in the current chunk of the password, and copy
118 * the result into the right place in the request. Also
119 * modify the scrambler in place, since we will use this
120 * in calculating the scrambler for next time.
121 */
122 for (i = 0; i < 16; i++)
92 for (pos = 0; pos < padded_len; pos += 16) {
93 int i;
94
95 /* Calculate the new scrambler */
96 MD5Init(&ctx);
97 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
98 MD5Update(&ctx, md5, 16);
99 MD5Final(md5, &ctx);
100
101 /*
102 * Mix in the current chunk of the password, and copy
103 * the result into the right place in the request. Also
104 * modify the scrambler in place, since we will use this
105 * in calculating the scrambler for next time.
106 */
107 for (i = 0; i < 16; i++)
123 h->out[h->pass_pos + pos + i] =
108 h->request[h->pass_pos + pos + i] =
124 md5[i] ^= h->pass[pos + i];
125 }
126}
127
109 md5[i] ^= h->pass[pos + i];
110 }
111}
112
128static void
129insert_request_authenticator(struct rad_handle *h, int resp)
130{
131 MD5_CTX ctx;
132 const struct rad_server *srvp;
133
134 srvp = &h->servers[h->srv];
135
136 /* Create the request authenticator */
137 MD5Init(&ctx);
138 MD5Update(&ctx, &h->out[POS_CODE], POS_AUTH - POS_CODE);
139 if (resp)
140 MD5Update(&ctx, &h->in[POS_AUTH], LEN_AUTH);
141 else
142 MD5Update(&ctx, &h->out[POS_AUTH], LEN_AUTH);
143 MD5Update(&ctx, &h->out[POS_ATTRS], h->out_len - POS_ATTRS);
144 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
145 MD5Final(&h->out[POS_AUTH], &ctx);
146}
147
148static void
149insert_message_authenticator(struct rad_handle *h, int resp)
150{
151#ifdef WITH_SSL
152 u_char md[EVP_MAX_MD_SIZE];
153 u_int md_len;
154 const struct rad_server *srvp;
155 HMAC_CTX ctx;
156 srvp = &h->servers[h->srv];
157
158 if (h->authentic_pos != 0) {
159 HMAC_CTX_init(&ctx);
160 HMAC_Init(&ctx, srvp->secret, strlen(srvp->secret), EVP_md5());
161 HMAC_Update(&ctx, &h->out[POS_CODE], POS_AUTH - POS_CODE);
162 if (resp)
163 HMAC_Update(&ctx, &h->in[POS_AUTH], LEN_AUTH);
164 else
165 HMAC_Update(&ctx, &h->out[POS_AUTH], LEN_AUTH);
166 HMAC_Update(&ctx, &h->out[POS_ATTRS],
167 h->out_len - POS_ATTRS);
168 HMAC_Final(&ctx, md, &md_len);
169 HMAC_CTX_cleanup(&ctx);
170 HMAC_cleanup(&ctx);
171 memcpy(&h->out[h->authentic_pos + 2], md, md_len);
172 }
173#endif
174}
175
176/*
177 * Return true if the current response is valid for a request to the
178 * specified server.
179 */
180static int
181is_valid_response(struct rad_handle *h, int srv,
182 const struct sockaddr_in *from)
183{
184 MD5_CTX ctx;
113/*
114 * Return true if the current response is valid for a request to the
115 * specified server.
116 */
117static int
118is_valid_response(struct rad_handle *h, int srv,
119 const struct sockaddr_in *from)
120{
121 MD5_CTX ctx;
185 unsigned char md5[MD5_DIGEST_LENGTH];
122 unsigned char md5[16];
186 const struct rad_server *srvp;
187 int len;
123 const struct rad_server *srvp;
124 int len;
188#ifdef WITH_SSL
189 HMAC_CTX hctx;
190 u_char resp[MSGSIZE], md[EVP_MAX_MD_SIZE];
191 u_int md_len;
192 int pos;
193#endif
194
195 srvp = &h->servers[srv];
196
197 /* Check the source address */
198 if (from->sin_family != srvp->addr.sin_family ||
199 from->sin_addr.s_addr != srvp->addr.sin_addr.s_addr ||
200 from->sin_port != srvp->addr.sin_port)
201 return 0;
202
203 /* Check the message length */
125
126 srvp = &h->servers[srv];
127
128 /* Check the source address */
129 if (from->sin_family != srvp->addr.sin_family ||
130 from->sin_addr.s_addr != srvp->addr.sin_addr.s_addr ||
131 from->sin_port != srvp->addr.sin_port)
132 return 0;
133
134 /* Check the message length */
204 if (h->in_len < POS_ATTRS)
135 if (h->resp_len < POS_ATTRS)
205 return 0;
136 return 0;
206 len = h->in[POS_LENGTH] << 8 | h->in[POS_LENGTH+1];
207 if (len > h->in_len)
137 len = h->response[POS_LENGTH] << 8 | h->response[POS_LENGTH+1];
138 if (len > h->resp_len)
208 return 0;
209
210 /* Check the response authenticator */
211 MD5Init(&ctx);
139 return 0;
140
141 /* Check the response authenticator */
142 MD5Init(&ctx);
212 MD5Update(&ctx, &h->in[POS_CODE], POS_AUTH - POS_CODE);
213 MD5Update(&ctx, &h->out[POS_AUTH], LEN_AUTH);
214 MD5Update(&ctx, &h->in[POS_ATTRS], len - POS_ATTRS);
143 MD5Update(&ctx, &h->response[POS_CODE], POS_AUTH - POS_CODE);
144 MD5Update(&ctx, &h->request[POS_AUTH], LEN_AUTH);
145 MD5Update(&ctx, &h->response[POS_ATTRS], len - POS_ATTRS);
215 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
216 MD5Final(md5, &ctx);
146 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
147 MD5Final(md5, &ctx);
217 if (memcmp(&h->in[POS_AUTH], md5, sizeof md5) != 0)
148 if (memcmp(&h->response[POS_AUTH], md5, sizeof md5) != 0)
218 return 0;
219
149 return 0;
150
220#ifdef WITH_SSL
221 /*
222 * For non accounting responses check the message authenticator,
223 * if any.
224 */
225 if (h->in[POS_CODE] != RAD_ACCOUNTING_RESPONSE) {
226
227 memcpy(resp, h->in, MSGSIZE);
228 pos = POS_ATTRS;
229
230 /* Search and verify the Message-Authenticator */
231 while (pos < len - 2) {
232
233 if (h->in[pos] == RAD_MESSAGE_AUTHENTIC) {
234 /* zero fill the Message-Authenticator */
235 memset(&resp[pos + 2], 0, MD5_DIGEST_LENGTH);
236
237 HMAC_CTX_init(&hctx);
238 HMAC_Init(&hctx, srvp->secret,
239 strlen(srvp->secret), EVP_md5());
240 HMAC_Update(&hctx, &h->in[POS_CODE],
241 POS_AUTH - POS_CODE);
242 HMAC_Update(&hctx, &h->out[POS_AUTH],
243 LEN_AUTH);
244 HMAC_Update(&hctx, &resp[POS_ATTRS],
245 h->in_len - POS_ATTRS);
246 HMAC_Final(&hctx, md, &md_len);
247 HMAC_CTX_cleanup(&hctx);
248 HMAC_cleanup(&hctx);
249 if (memcmp(md, &h->in[pos + 2],
250 MD5_DIGEST_LENGTH) != 0)
251 return 0;
252 break;
253 }
254 pos += h->in[pos + 1];
255 }
256 }
257#endif
258 return 1;
259}
260
151 return 1;
152}
153
261/*
262 * Return true if the current request is valid for the specified server.
263 */
264static int
154static int
265is_valid_request(struct rad_handle *h)
266{
267 MD5_CTX ctx;
268 unsigned char md5[MD5_DIGEST_LENGTH];
269 const struct rad_server *srvp;
270 int len;
271#ifdef WITH_SSL
272 HMAC_CTX hctx;
273 u_char resp[MSGSIZE], md[EVP_MAX_MD_SIZE];
274 u_int md_len;
275 int pos;
276#endif
277
278 srvp = &h->servers[h->srv];
279
280 /* Check the message length */
281 if (h->in_len < POS_ATTRS)
282 return (0);
283 len = h->in[POS_LENGTH] << 8 | h->in[POS_LENGTH+1];
284 if (len > h->in_len)
285 return (0);
286
287 if (h->in[POS_CODE] != RAD_ACCESS_REQUEST) {
288 uint32_t zeroes[4] = { 0, 0, 0, 0 };
289 /* Check the request authenticator */
290 MD5Init(&ctx);
291 MD5Update(&ctx, &h->in[POS_CODE], POS_AUTH - POS_CODE);
292 MD5Update(&ctx, zeroes, LEN_AUTH);
293 MD5Update(&ctx, &h->in[POS_ATTRS], len - POS_ATTRS);
294 MD5Update(&ctx, srvp->secret, strlen(srvp->secret));
295 MD5Final(md5, &ctx);
296 if (memcmp(&h->in[POS_AUTH], md5, sizeof md5) != 0)
297 return (0);
298 }
299
300#ifdef WITH_SSL
301 /* Search and verify the Message-Authenticator */
302 pos = POS_ATTRS;
303 while (pos < len - 2) {
304 if (h->in[pos] == RAD_MESSAGE_AUTHENTIC) {
305 memcpy(resp, h->in, MSGSIZE);
306 /* zero fill the Request-Authenticator */
307 if (h->in[POS_CODE] != RAD_ACCESS_REQUEST)
308 memset(&resp[POS_AUTH], 0, LEN_AUTH);
309 /* zero fill the Message-Authenticator */
310 memset(&resp[pos + 2], 0, MD5_DIGEST_LENGTH);
311
312 HMAC_CTX_init(&hctx);
313 HMAC_Init(&hctx, srvp->secret,
314 strlen(srvp->secret), EVP_md5());
315 HMAC_Update(&hctx, resp, h->in_len);
316 HMAC_Final(&hctx, md, &md_len);
317 HMAC_CTX_cleanup(&hctx);
318 HMAC_cleanup(&hctx);
319 if (memcmp(md, &h->in[pos + 2],
320 MD5_DIGEST_LENGTH) != 0)
321 return (0);
322 break;
323 }
324 pos += h->in[pos + 1];
325 }
326#endif
327 return (1);
328}
329
330static int
331put_password_attr(struct rad_handle *h, int type, const void *value, size_t len)
332{
333 int padded_len;
334 int pad_len;
335
336 if (h->pass_pos != 0) {
337 generr(h, "Multiple User-Password attributes specified");
338 return -1;

--- 4 unchanged lines hidden (view full) ---

343 pad_len = padded_len - len;
344
345 /*
346 * Put in a place-holder attribute containing all zeros, and
347 * remember where it is so we can fill it in later.
348 */
349 clear_password(h);
350 put_raw_attr(h, type, h->pass, padded_len);
155put_password_attr(struct rad_handle *h, int type, const void *value, size_t len)
156{
157 int padded_len;
158 int pad_len;
159
160 if (h->pass_pos != 0) {
161 generr(h, "Multiple User-Password attributes specified");
162 return -1;

--- 4 unchanged lines hidden (view full) ---

167 pad_len = padded_len - len;
168
169 /*
170 * Put in a place-holder attribute containing all zeros, and
171 * remember where it is so we can fill it in later.
172 */
173 clear_password(h);
174 put_raw_attr(h, type, h->pass, padded_len);
351 h->pass_pos = h->out_len - padded_len;
175 h->pass_pos = h->req_len - padded_len;
352
353 /* Save the cleartext password, padded as necessary */
354 memcpy(h->pass, value, len);
355 h->pass_len = len;
356 memset(h->pass + len, 0, pad_len);
357 return 0;
358}
359
360static int
361put_raw_attr(struct rad_handle *h, int type, const void *value, size_t len)
362{
363 if (len > 253) {
364 generr(h, "Attribute too long");
365 return -1;
366 }
176
177 /* Save the cleartext password, padded as necessary */
178 memcpy(h->pass, value, len);
179 h->pass_len = len;
180 memset(h->pass + len, 0, pad_len);
181 return 0;
182}
183
184static int
185put_raw_attr(struct rad_handle *h, int type, const void *value, size_t len)
186{
187 if (len > 253) {
188 generr(h, "Attribute too long");
189 return -1;
190 }
367 if (h->out_len + 2 + len > MSGSIZE) {
191 if (h->req_len + 2 + len > MSGSIZE) {
368 generr(h, "Maximum message length exceeded");
369 return -1;
370 }
192 generr(h, "Maximum message length exceeded");
193 return -1;
194 }
371 h->out[h->out_len++] = type;
372 h->out[h->out_len++] = len + 2;
373 memcpy(&h->out[h->out_len], value, len);
374 h->out_len += len;
195 h->request[h->req_len++] = type;
196 h->request[h->req_len++] = len + 2;
197 memcpy(&h->request[h->req_len], value, len);
198 h->req_len += len;
375 return 0;
376}
377
378int
379rad_add_server(struct rad_handle *h, const char *host, int port,
380 const char *secret, int timeout, int tries)
381{
382 struct rad_server *srvp;

--- 13 unchanged lines hidden (view full) ---

396 if ((hent = gethostbyname(host)) == NULL) {
397 generr(h, "%s: host not found", host);
398 return -1;
399 }
400 memcpy(&srvp->addr.sin_addr, hent->h_addr,
401 sizeof srvp->addr.sin_addr);
402 }
403 if (port != 0)
199 return 0;
200}
201
202int
203rad_add_server(struct rad_handle *h, const char *host, int port,
204 const char *secret, int timeout, int tries)
205{
206 struct rad_server *srvp;

--- 13 unchanged lines hidden (view full) ---

220 if ((hent = gethostbyname(host)) == NULL) {
221 generr(h, "%s: host not found", host);
222 return -1;
223 }
224 memcpy(&srvp->addr.sin_addr, hent->h_addr,
225 sizeof srvp->addr.sin_addr);
226 }
227 if (port != 0)
404 srvp->addr.sin_port = htons((u_short)port);
228 srvp->addr.sin_port = htons(port);
405 else {
406 struct servent *sent;
407
229 else {
230 struct servent *sent;
231
408 if (h->type == RADIUS_AUTH)
409 srvp->addr.sin_port =
410 (sent = getservbyname("radius", "udp")) != NULL ?
411 sent->s_port : htons(RADIUS_PORT);
412 else
413 srvp->addr.sin_port =
414 (sent = getservbyname("radacct", "udp")) != NULL ?
415 sent->s_port : htons(RADACCT_PORT);
232 srvp->addr.sin_port =
233 (sent = getservbyname("radius", "udp")) != NULL ?
234 sent->s_port : htons(RADIUS_PORT);
416 }
417 if ((srvp->secret = strdup(secret)) == NULL) {
418 generr(h, "Out of memory");
419 return -1;
420 }
421 srvp->timeout = timeout;
422 srvp->max_tries = tries;
423 srvp->num_tries = 0;

--- 30 unchanged lines hidden (view full) ---

454 if ((fp = fopen(path, "r")) == NULL) {
455 generr(h, "Cannot open \"%s\": %s", path, strerror(errno));
456 return -1;
457 }
458 retval = 0;
459 linenum = 0;
460 while (fgets(buf, sizeof buf, fp) != NULL) {
461 int len;
235 }
236 if ((srvp->secret = strdup(secret)) == NULL) {
237 generr(h, "Out of memory");
238 return -1;
239 }
240 srvp->timeout = timeout;
241 srvp->max_tries = tries;
242 srvp->num_tries = 0;

--- 30 unchanged lines hidden (view full) ---

273 if ((fp = fopen(path, "r")) == NULL) {
274 generr(h, "Cannot open \"%s\": %s", path, strerror(errno));
275 return -1;
276 }
277 retval = 0;
278 linenum = 0;
279 while (fgets(buf, sizeof buf, fp) != NULL) {
280 int len;
462 char *fields[5];
281 char *fields[4];
463 int nfields;
464 char msg[ERRSIZE];
282 int nfields;
283 char msg[ERRSIZE];
465 char *type;
466 char *host, *res;
284 char *host;
467 char *port_str;
468 char *secret;
469 char *timeout_str;
470 char *maxtries_str;
471 char *end;
285 char *port_str;
286 char *secret;
287 char *timeout_str;
288 char *maxtries_str;
289 char *end;
472 char *wanttype;
473 unsigned long timeout;
474 unsigned long maxtries;
475 int port;
290 unsigned long timeout;
291 unsigned long maxtries;
292 int port;
476 int i;
477
478 linenum++;
479 len = strlen(buf);
480 /* We know len > 0, else fgets would have returned NULL. */
481 if (buf[len - 1] != '\n') {
482 if (len == sizeof buf - 1)
483 generr(h, "%s:%d: line too long", path,
484 linenum);
485 else
486 generr(h, "%s:%d: missing newline", path,
487 linenum);
488 retval = -1;
489 break;
490 }
491 buf[len - 1] = '\0';
492
493 /* Extract the fields from the line. */
293
294 linenum++;
295 len = strlen(buf);
296 /* We know len > 0, else fgets would have returned NULL. */
297 if (buf[len - 1] != '\n') {
298 if (len == sizeof buf - 1)
299 generr(h, "%s:%d: line too long", path,
300 linenum);
301 else
302 generr(h, "%s:%d: missing newline", path,
303 linenum);
304 retval = -1;
305 break;
306 }
307 buf[len - 1] = '\0';
308
309 /* Extract the fields from the line. */
494 nfields = split(buf, fields, 5, msg, sizeof msg);
310 nfields = split(buf, fields, 4, msg, sizeof msg);
495 if (nfields == -1) {
496 generr(h, "%s:%d: %s", path, linenum, msg);
497 retval = -1;
498 break;
499 }
500 if (nfields == 0)
501 continue;
311 if (nfields == -1) {
312 generr(h, "%s:%d: %s", path, linenum, msg);
313 retval = -1;
314 break;
315 }
316 if (nfields == 0)
317 continue;
502 /*
503 * The first field should contain "auth" or "acct" for
504 * authentication or accounting, respectively. But older
505 * versions of the file didn't have that field. Default
506 * it to "auth" for backward compatibility.
507 */
508 if (strcmp(fields[0], "auth") != 0 &&
509 strcmp(fields[0], "acct") != 0) {
510 if (nfields >= 5) {
511 generr(h, "%s:%d: invalid service type", path,
512 linenum);
513 retval = -1;
514 break;
515 }
516 nfields++;
517 for (i = nfields; --i > 0; )
518 fields[i] = fields[i - 1];
519 fields[0] = "auth";
520 }
521 if (nfields < 3) {
318 if (nfields < 2) {
522 generr(h, "%s:%d: missing shared secret", path,
523 linenum);
524 retval = -1;
525 break;
526 }
319 generr(h, "%s:%d: missing shared secret", path,
320 linenum);
321 retval = -1;
322 break;
323 }
527 type = fields[0];
528 host = fields[1];
529 secret = fields[2];
530 timeout_str = fields[3];
531 maxtries_str = fields[4];
324 host = fields[0];
325 secret = fields[1];
326 timeout_str = fields[2];
327 maxtries_str = fields[3];
532
328
533 /* Ignore the line if it is for the wrong service type. */
534 wanttype = h->type == RADIUS_AUTH ? "auth" : "acct";
535 if (strcmp(type, wanttype) != 0)
536 continue;
537
538 /* Parse and validate the fields. */
329 /* Parse and validate the fields. */
539 res = host;
540 host = strsep(&res, ":");
541 port_str = strsep(&res, ":");
330 host = strtok(host, ":");
331 port_str = strtok(NULL, ":");
542 if (port_str != NULL) {
543 port = strtoul(port_str, &end, 10);
544 if (*end != '\0') {
545 generr(h, "%s:%d: invalid port", path,
546 linenum);
547 retval = -1;
548 break;
549 }

--- 17 unchanged lines hidden (view full) ---

567 retval = -1;
568 break;
569 }
570 } else
571 maxtries = MAXTRIES;
572
573 if (rad_add_server(h, host, port, secret, timeout, maxtries) ==
574 -1) {
332 if (port_str != NULL) {
333 port = strtoul(port_str, &end, 10);
334 if (*end != '\0') {
335 generr(h, "%s:%d: invalid port", path,
336 linenum);
337 retval = -1;
338 break;
339 }

--- 17 unchanged lines hidden (view full) ---

357 retval = -1;
358 break;
359 }
360 } else
361 maxtries = MAXTRIES;
362
363 if (rad_add_server(h, host, port, secret, timeout, maxtries) ==
364 -1) {
365 char msg[ERRSIZE];
366
575 strcpy(msg, h->errmsg);
576 generr(h, "%s:%d: %s", path, linenum, msg);
577 retval = -1;
578 break;
579 }
580 }
581 /* Clear out the buffer to wipe a possible copy of a shared secret */
582 memset(buf, 0, sizeof buf);
583 fclose(fp);
584 return retval;
585}
586
367 strcpy(msg, h->errmsg);
368 generr(h, "%s:%d: %s", path, linenum, msg);
369 retval = -1;
370 break;
371 }
372 }
373 /* Clear out the buffer to wipe a possible copy of a shared secret */
374 memset(buf, 0, sizeof buf);
375 fclose(fp);
376 return retval;
377}
378
587/*
588 * rad_init_send_request() must have previously been called.
589 * Returns:
590 * 0 The application should select on *fd with a timeout of tv before
591 * calling rad_continue_send_request again.
592 * < 0 Failure
593 * > 0 Success
594 */
595int
379int
596rad_continue_send_request(struct rad_handle *h, int selected, int *fd,
597 struct timeval *tv)
598{
599 int n;
600
601 if (h->type == RADIUS_SERVER) {
602 generr(h, "denied function call");
603 return (-1);
604 }
605 if (selected) {
606 struct sockaddr_in from;
607 socklen_t fromlen;
608
609 fromlen = sizeof from;
610 h->in_len = recvfrom(h->fd, h->in,
611 MSGSIZE, MSG_WAITALL, (struct sockaddr *)&from, &fromlen);
612 if (h->in_len == -1) {
613 generr(h, "recvfrom: %s", strerror(errno));
614 return -1;
615 }
616 if (is_valid_response(h, h->srv, &from)) {
617 h->in_len = h->in[POS_LENGTH] << 8 |
618 h->in[POS_LENGTH+1];
619 h->in_pos = POS_ATTRS;
620 return h->in[POS_CODE];
621 }
622 }
623
624 if (h->try == h->total_tries) {
625 generr(h, "No valid RADIUS responses received");
626 return -1;
627 }
628
629 /*
630 * Scan round-robin to the next server that has some
631 * tries left. There is guaranteed to be one, or we
632 * would have exited this loop by now.
633 */
634 while (h->servers[h->srv].num_tries >= h->servers[h->srv].max_tries)
635 if (++h->srv >= h->num_servers)
636 h->srv = 0;
637
638 if (h->out[POS_CODE] == RAD_ACCESS_REQUEST) {
639 /* Insert the scrambled password into the request */
640 if (h->pass_pos != 0)
641 insert_scrambled_password(h, h->srv);
642 }
643 insert_message_authenticator(h, 0);
644 if (h->out[POS_CODE] != RAD_ACCESS_REQUEST) {
645 /* Insert the request authenticator into the request */
646 insert_request_authenticator(h, h->srv);
647 }
648
649 /* Send the request */
650 n = sendto(h->fd, h->out, h->out_len, 0,
651 (const struct sockaddr *)&h->servers[h->srv].addr,
652 sizeof h->servers[h->srv].addr);
653 if (n != h->out_len)
654 tv->tv_sec = 1; /* Do not wait full timeout if send failed. */
655 else
656 tv->tv_sec = h->servers[h->srv].timeout;
657 h->try++;
658 h->servers[h->srv].num_tries++;
659 tv->tv_usec = 0;
660 *fd = h->fd;
661
662 return 0;
663}
664
665int
666rad_receive_request(struct rad_handle *h)
667{
668 struct sockaddr_in from;
669 socklen_t fromlen;
670 int n;
671
672 if (h->type != RADIUS_SERVER) {
673 generr(h, "denied function call");
674 return (-1);
675 }
676 h->srv = -1;
677 fromlen = sizeof(from);
678 h->in_len = recvfrom(h->fd, h->in,
679 MSGSIZE, MSG_WAITALL, (struct sockaddr *)&from, &fromlen);
680 if (h->in_len == -1) {
681 generr(h, "recvfrom: %s", strerror(errno));
682 return (-1);
683 }
684 for (n = 0; n < h->num_servers; n++) {
685 if (h->servers[n].addr.sin_addr.s_addr == from.sin_addr.s_addr) {
686 h->servers[n].addr.sin_port = from.sin_port;
687 h->srv = n;
688 break;
689 }
690 }
691 if (h->srv == -1)
692 return (-2);
693 if (is_valid_request(h)) {
694 h->in_len = h->in[POS_LENGTH] << 8 |
695 h->in[POS_LENGTH+1];
696 h->in_pos = POS_ATTRS;
697 return (h->in[POS_CODE]);
698 }
699 return (-3);
700}
701
702int
703rad_send_response(struct rad_handle *h)
704{
705 int n;
706
707 if (h->type != RADIUS_SERVER) {
708 generr(h, "denied function call");
709 return (-1);
710 }
711 /* Fill in the length field in the message */
712 h->out[POS_LENGTH] = h->out_len >> 8;
713 h->out[POS_LENGTH+1] = h->out_len;
714
715 insert_message_authenticator(h,
716 (h->in[POS_CODE] == RAD_ACCESS_REQUEST) ? 1 : 0);
717 insert_request_authenticator(h, 1);
718
719 /* Send the request */
720 n = sendto(h->fd, h->out, h->out_len, 0,
721 (const struct sockaddr *)&h->servers[h->srv].addr,
722 sizeof h->servers[h->srv].addr);
723 if (n != h->out_len) {
724 if (n == -1)
725 generr(h, "sendto: %s", strerror(errno));
726 else
727 generr(h, "sendto: short write");
728 return -1;
729 }
730
731 return 0;
732}
733
734int
735rad_create_request(struct rad_handle *h, int code)
736{
737 int i;
738
380rad_create_request(struct rad_handle *h, int code)
381{
382 int i;
383
739 if (h->type == RADIUS_SERVER) {
740 generr(h, "denied function call");
741 return (-1);
384 h->request[POS_CODE] = code;
385 h->request[POS_IDENT] = ++h->ident;
386 /* Create a random authenticator */
387 for (i = 0; i < LEN_AUTH; i += 2) {
388 long r;
389 r = random();
390 h->request[POS_AUTH+i] = r;
391 h->request[POS_AUTH+i+1] = r >> 8;
742 }
392 }
743 h->out[POS_CODE] = code;
744 h->out[POS_IDENT] = ++h->ident;
745 if (code == RAD_ACCESS_REQUEST) {
746 /* Create a random authenticator */
747 for (i = 0; i < LEN_AUTH; i += 2) {
748 long r;
749 r = random();
750 h->out[POS_AUTH+i] = (u_char)r;
751 h->out[POS_AUTH+i+1] = (u_char)(r >> 8);
752 }
753 } else
754 memset(&h->out[POS_AUTH], 0, LEN_AUTH);
755 h->out_len = POS_ATTRS;
393 h->req_len = POS_ATTRS;
756 clear_password(h);
394 clear_password(h);
757 h->authentic_pos = 0;
758 h->out_created = 1;
759 return 0;
760}
761
395 return 0;
396}
397
762int
763rad_create_response(struct rad_handle *h, int code)
764{
765
766 if (h->type != RADIUS_SERVER) {
767 generr(h, "denied function call");
768 return (-1);
769 }
770 h->out[POS_CODE] = code;
771 h->out[POS_IDENT] = h->in[POS_IDENT];
772 memset(&h->out[POS_AUTH], 0, LEN_AUTH);
773 h->out_len = POS_ATTRS;
774 clear_password(h);
775 h->authentic_pos = 0;
776 h->out_created = 1;
777 return 0;
778}
779
780struct in_addr
781rad_cvt_addr(const void *data)
782{
783 struct in_addr value;
784
785 memcpy(&value.s_addr, data, sizeof value.s_addr);
786 return value;
787}

--- 24 unchanged lines hidden (view full) ---

812 * Returns the attribute type. If none are left, returns 0. On failure,
813 * returns -1.
814 */
815int
816rad_get_attr(struct rad_handle *h, const void **value, size_t *len)
817{
818 int type;
819
398struct in_addr
399rad_cvt_addr(const void *data)
400{
401 struct in_addr value;
402
403 memcpy(&value.s_addr, data, sizeof value.s_addr);
404 return value;
405}

--- 24 unchanged lines hidden (view full) ---

430 * Returns the attribute type. If none are left, returns 0. On failure,
431 * returns -1.
432 */
433int
434rad_get_attr(struct rad_handle *h, const void **value, size_t *len)
435{
436 int type;
437
820 if (h->in_pos >= h->in_len)
438 if (h->resp_pos >= h->resp_len)
821 return 0;
439 return 0;
822 if (h->in_pos + 2 > h->in_len) {
440 if (h->resp_pos + 2 > h->resp_len) {
823 generr(h, "Malformed attribute in response");
824 return -1;
825 }
441 generr(h, "Malformed attribute in response");
442 return -1;
443 }
826 type = h->in[h->in_pos++];
827 *len = h->in[h->in_pos++] - 2;
828 if (h->in_pos + (int)*len > h->in_len) {
444 type = h->response[h->resp_pos++];
445 *len = h->response[h->resp_pos++] - 2;
446 if (h->resp_pos + *len > h->resp_len) {
829 generr(h, "Malformed attribute in response");
830 return -1;
831 }
447 generr(h, "Malformed attribute in response");
448 return -1;
449 }
832 *value = &h->in[h->in_pos];
833 h->in_pos += *len;
450 *value = &h->response[h->resp_pos];
451 h->resp_pos += *len;
834 return type;
835}
836
837/*
452 return type;
453}
454
455/*
838 * Returns -1 on error, 0 to indicate no event and >0 for success
839 */
840int
841rad_init_send_request(struct rad_handle *h, int *fd, struct timeval *tv)
842{
843 int srv;
844
845 if (h->type == RADIUS_SERVER) {
846 generr(h, "denied function call");
847 return (-1);
848 }
849 /* Make sure we have a socket to use */
850 if (h->fd == -1) {
851 struct sockaddr_in sin;
852
853 if ((h->fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
854 generr(h, "Cannot create socket: %s", strerror(errno));
855 return -1;
856 }
857 memset(&sin, 0, sizeof sin);
858 sin.sin_len = sizeof sin;
859 sin.sin_family = AF_INET;
860 sin.sin_addr.s_addr = INADDR_ANY;
861 sin.sin_port = htons(0);
862 if (bind(h->fd, (const struct sockaddr *)&sin,
863 sizeof sin) == -1) {
864 generr(h, "bind: %s", strerror(errno));
865 close(h->fd);
866 h->fd = -1;
867 return -1;
868 }
869 }
870
871 if (h->out[POS_CODE] != RAD_ACCESS_REQUEST) {
872 /* Make sure no password given */
873 if (h->pass_pos || h->chap_pass) {
874 generr(h, "User or Chap Password"
875 " in accounting request");
876 return -1;
877 }
878 } else {
879 if (h->eap_msg == 0) {
880 /* Make sure the user gave us a password */
881 if (h->pass_pos == 0 && !h->chap_pass) {
882 generr(h, "No User or Chap Password"
883 " attributes given");
884 return -1;
885 }
886 if (h->pass_pos != 0 && h->chap_pass) {
887 generr(h, "Both User and Chap Password"
888 " attributes given");
889 return -1;
890 }
891 }
892 }
893
894 /* Fill in the length field in the message */
895 h->out[POS_LENGTH] = h->out_len >> 8;
896 h->out[POS_LENGTH+1] = h->out_len;
897
898 /*
899 * Count the total number of tries we will make, and zero the
900 * counter for each server.
901 */
902 h->total_tries = 0;
903 for (srv = 0; srv < h->num_servers; srv++) {
904 h->total_tries += h->servers[srv].max_tries;
905 h->servers[srv].num_tries = 0;
906 }
907 if (h->total_tries == 0) {
908 generr(h, "No RADIUS servers specified");
909 return -1;
910 }
911
912 h->try = h->srv = 0;
913
914 return rad_continue_send_request(h, 0, fd, tv);
915}
916
917/*
918 * Create and initialize a rad_handle structure, and return it to the
919 * caller. Can fail only if the necessary memory cannot be allocated.
920 * In that case, it returns NULL.
921 */
922struct rad_handle *
456 * Create and initialize a rad_handle structure, and return it to the
457 * caller. Can fail only if the necessary memory cannot be allocated.
458 * In that case, it returns NULL.
459 */
460struct rad_handle *
923rad_auth_open(void)
461rad_open(void)
924{
925 struct rad_handle *h;
926
927 h = (struct rad_handle *)malloc(sizeof(struct rad_handle));
928 if (h != NULL) {
929 srandomdev();
930 h->fd = -1;
931 h->num_servers = 0;
932 h->ident = random();
933 h->errmsg[0] = '\0';
934 memset(h->pass, 0, sizeof h->pass);
935 h->pass_len = 0;
936 h->pass_pos = 0;
462{
463 struct rad_handle *h;
464
465 h = (struct rad_handle *)malloc(sizeof(struct rad_handle));
466 if (h != NULL) {
467 srandomdev();
468 h->fd = -1;
469 h->num_servers = 0;
470 h->ident = random();
471 h->errmsg[0] = '\0';
472 memset(h->pass, 0, sizeof h->pass);
473 h->pass_len = 0;
474 h->pass_pos = 0;
937 h->chap_pass = 0;
938 h->authentic_pos = 0;
939 h->type = RADIUS_AUTH;
940 h->out_created = 0;
941 h->eap_msg = 0;
942 }
943 return h;
944}
945
475 }
476 return h;
477}
478
946struct rad_handle *
947rad_acct_open(void)
948{
949 struct rad_handle *h;
950
951 h = rad_open();
952 if (h != NULL)
953 h->type = RADIUS_ACCT;
954 return h;
955}
956
957struct rad_handle *
958rad_server_open(int fd)
959{
960 struct rad_handle *h;
961
962 h = rad_open();
963 if (h != NULL) {
964 h->type = RADIUS_SERVER;
965 h->fd = fd;
966 }
967 return h;
968}
969
970struct rad_handle *
971rad_open(void)
972{
973 return rad_auth_open();
974}
975
976int
977rad_put_addr(struct rad_handle *h, int type, struct in_addr addr)
978{
979 return rad_put_attr(h, type, &addr.s_addr, sizeof addr.s_addr);
980}
981
982int
983rad_put_attr(struct rad_handle *h, int type, const void *value, size_t len)
984{
479int
480rad_put_addr(struct rad_handle *h, int type, struct in_addr addr)
481{
482 return rad_put_attr(h, type, &addr.s_addr, sizeof addr.s_addr);
483}
484
485int
486rad_put_attr(struct rad_handle *h, int type, const void *value, size_t len)
487{
985 int result;
986
987 if (!h->out_created) {
988 generr(h, "Please call rad_create_request()"
989 " before putting attributes");
990 return -1;
991 }
992
993 if (h->out[POS_CODE] == RAD_ACCOUNTING_REQUEST) {
994 if (type == RAD_EAP_MESSAGE) {
995 generr(h, "EAP-Message attribute is not valid"
996 " in accounting requests");
997 return -1;
998 }
999 }
1000
1001 /*
1002 * When proxying EAP Messages, the Message Authenticator
1003 * MUST be present; see RFC 3579.
1004 */
1005 if (type == RAD_EAP_MESSAGE) {
1006 if (rad_put_message_authentic(h) == -1)
1007 return -1;
1008 }
1009
1010 if (type == RAD_USER_PASSWORD) {
1011 result = put_password_attr(h, type, value, len);
1012 } else if (type == RAD_MESSAGE_AUTHENTIC) {
1013 result = rad_put_message_authentic(h);
1014 } else {
1015 result = put_raw_attr(h, type, value, len);
1016 if (result == 0) {
1017 if (type == RAD_CHAP_PASSWORD)
1018 h->chap_pass = 1;
1019 else if (type == RAD_EAP_MESSAGE)
1020 h->eap_msg = 1;
1021 }
1022 }
1023
1024 return result;
488 return type == RAD_USER_PASSWORD ?
489 put_password_attr(h, type, value, len) :
490 put_raw_attr(h, type, value, len);
1025}
1026
1027int
1028rad_put_int(struct rad_handle *h, int type, u_int32_t value)
1029{
1030 u_int32_t nvalue;
1031
1032 nvalue = htonl(value);
1033 return rad_put_attr(h, type, &nvalue, sizeof nvalue);
1034}
1035
1036int
1037rad_put_string(struct rad_handle *h, int type, const char *str)
1038{
1039 return rad_put_attr(h, type, str, strlen(str));
1040}
1041
491}
492
493int
494rad_put_int(struct rad_handle *h, int type, u_int32_t value)
495{
496 u_int32_t nvalue;
497
498 nvalue = htonl(value);
499 return rad_put_attr(h, type, &nvalue, sizeof nvalue);
500}
501
502int
503rad_put_string(struct rad_handle *h, int type, const char *str)
504{
505 return rad_put_attr(h, type, str, strlen(str));
506}
507
1042int
1043rad_put_message_authentic(struct rad_handle *h)
1044{
1045#ifdef WITH_SSL
1046 u_char md_zero[MD5_DIGEST_LENGTH];
1047
1048 if (h->out[POS_CODE] == RAD_ACCOUNTING_REQUEST) {
1049 generr(h, "Message-Authenticator is not valid"
1050 " in accounting requests");
1051 return -1;
1052 }
1053
1054 if (h->authentic_pos == 0) {
1055 h->authentic_pos = h->out_len;
1056 memset(md_zero, 0, sizeof(md_zero));
1057 return (put_raw_attr(h, RAD_MESSAGE_AUTHENTIC, md_zero,
1058 sizeof(md_zero)));
1059 }
1060 return 0;
1061#else
1062 generr(h, "Message Authenticator not supported,"
1063 " please recompile libradius with SSL support");
1064 return -1;
1065#endif
1066}
1067
1068/*
1069 * Returns the response type code on success, or -1 on failure.
1070 */
1071int
1072rad_send_request(struct rad_handle *h)
1073{
508/*
509 * Returns the response type code on success, or -1 on failure.
510 */
511int
512rad_send_request(struct rad_handle *h)
513{
1074 struct timeval timelimit;
1075 struct timeval tv;
1076 int fd;
514 int total_tries;
515 int try;
516 int srv;
1077 int n;
517 int n;
518 int got_valid_response;
1078
519
1079 n = rad_init_send_request(h, &fd, &tv);
520 /* Make sure we have a socket to use */
521 if (h->fd == -1) {
522 struct sockaddr_in sin;
1080
523
1081 if (n != 0)
1082 return n;
524 if ((h->fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
525 generr(h, "Cannot create socket: %s", strerror(errno));
526 return -1;
527 }
528 memset(&sin, 0, sizeof sin);
529 sin.sin_len = sizeof sin;
530 sin.sin_family = AF_INET;
531 sin.sin_addr.s_addr = INADDR_ANY;
532 sin.sin_port = htons(0);
533 if (bind(h->fd, (const struct sockaddr *)&sin,
534 sizeof sin) == -1) {
535 generr(h, "bind: %s", strerror(errno));
536 close(h->fd);
537 h->fd = -1;
538 return -1;
539 }
540 }
1083
541
1084 gettimeofday(&timelimit, NULL);
1085 timeradd(&tv, &timelimit, &timelimit);
542 /* Make sure the user gave us a password */
543 if (h->pass_pos == 0) {
544 generr(h, "No User-Password attribute given");
545 return -1;
546 }
1086
547
1087 for ( ; ; ) {
1088 fd_set readfds;
548 /* Fill in the length field in the message */
549 h->request[POS_LENGTH] = h->req_len >> 8;
550 h->request[POS_LENGTH+1] = h->req_len;
1089
551
1090 FD_ZERO(&readfds);
1091 FD_SET(fd, &readfds);
552 /*
553 * Count the total number of tries we will make, and zero the
554 * counter for each server.
555 */
556 total_tries = 0;
557 for (srv = 0; srv < h->num_servers; srv++) {
558 total_tries += h->servers[srv].max_tries;
559 h->servers[srv].num_tries = 0;
560 }
561 if (total_tries == 0) {
562 generr(h, "No RADIUS servers specified");
563 return -1;
564 }
1092
565
1093 n = select(fd + 1, &readfds, NULL, NULL, &tv);
566 srv = 0;
567 got_valid_response = 0;
568 for (try = 0; try < total_tries; try++) {
569 struct timeval timelimit;
570 struct timeval tv;
1094
571
1095 if (n == -1) {
1096 generr(h, "select: %s", strerror(errno));
572 /*
573 * Scan round-robin to the next server that has some
574 * tries left. There is guaranteed to be one, or we
575 * would have exited this loop by now.
576 */
577 while (h->servers[srv].num_tries >=
578 h->servers[srv].max_tries)
579 if (++srv >= h->num_servers)
580 srv = 0;
581
582 /* Insert the scrambled password into the request */
583 insert_scrambled_password(h, srv);
584
585 /* Send the request */
586 n = sendto(h->fd, h->request, h->req_len, 0,
587 (const struct sockaddr *)&h->servers[srv].addr,
588 sizeof h->servers[srv].addr);
589 if (n != h->req_len) {
590 if (n == -1)
591 generr(h, "sendto: %s", strerror(errno));
592 else
593 generr(h, "sendto: short write");
1097 return -1;
1098 }
594 return -1;
595 }
596 h->servers[srv].num_tries++;
1099
597
1100 if (!FD_ISSET(fd, &readfds)) {
598 /* Wait for a valid response */
599 gettimeofday(&timelimit, NULL);
600 timelimit.tv_sec += h->servers[srv].timeout;
601
602 tv.tv_sec = h->servers[srv].timeout;
603 tv.tv_usec = 0;
604 for ( ; ; ) {
605 fd_set readfds;
606
607 FD_ZERO(&readfds);
608 FD_SET(h->fd, &readfds);
609 n = select(h->fd + 1, &readfds, NULL, NULL, &tv);
610 if (n == -1) {
611 generr(h, "select: %s", strerror(errno));
612 return -1;
613 }
614 if (n == 0) /* Timed out */
615 break;
616 if (FD_ISSET(h->fd, &readfds)) {
617 struct sockaddr_in from;
618 int fromlen;
619
620 fromlen = sizeof from;
621 h->resp_len = recvfrom(h->fd, h->response,
622 MSGSIZE, MSG_WAITALL,
623 (struct sockaddr *)&from, &fromlen);
624 if (h->resp_len == -1) {
625 generr(h, "recvfrom: %s",
626 strerror(errno));
627 return -1;
628 }
629 if (is_valid_response(h, srv, &from)) {
630 got_valid_response = 1;
631 break;
632 }
633 }
1101 /* Compute a new timeout */
1102 gettimeofday(&tv, NULL);
1103 timersub(&timelimit, &tv, &tv);
634 /* Compute a new timeout */
635 gettimeofday(&tv, NULL);
636 timersub(&timelimit, &tv, &tv);
1104 if (tv.tv_sec > 0 || (tv.tv_sec == 0 && tv.tv_usec > 0))
1105 /* Continue the select */
1106 continue;
637 if (tv.tv_sec < 0) /* Still poll once more */
638 timerclear(&tv);
1107 }
639 }
1108
1109 n = rad_continue_send_request(h, n, &fd, &tv);
1110
1111 if (n != 0)
1112 return n;
1113
1114 gettimeofday(&timelimit, NULL);
1115 timeradd(&tv, &timelimit, &timelimit);
640 if (got_valid_response)
641 break;
642 /* Advance to the next server */
643 if (++srv >= h->num_servers)
644 srv = 0;
1116 }
645 }
646 if (!got_valid_response) {
647 generr(h, "No valid RADIUS responses received");
648 return -1;
649 }
650 h->resp_len = h->response[POS_LENGTH] << 8 | h->response[POS_LENGTH+1];
651 h->resp_pos = POS_ATTRS;
652 return h->response[POS_CODE];
1117}
1118
1119const char *
1120rad_strerror(struct rad_handle *h)
1121{
1122 return h->errmsg;
1123}
1124

--- 69 unchanged lines hidden (view full) ---

1194 p += strcspn(p, ws);
1195 if (*p != '\0')
1196 *p++ = '\0';
1197 }
1198 i++;
1199 }
1200 return i;
1201}
653}
654
655const char *
656rad_strerror(struct rad_handle *h)
657{
658 return h->errmsg;
659}
660

--- 69 unchanged lines hidden (view full) ---

730 p += strcspn(p, ws);
731 if (*p != '\0')
732 *p++ = '\0';
733 }
734 i++;
735 }
736 return i;
737}
1202
1203int
1204rad_get_vendor_attr(u_int32_t *vendor, const void **data, size_t *len)
1205{
1206 struct vendor_attribute *attr;
1207
1208 attr = (struct vendor_attribute *)*data;
1209 *vendor = ntohl(attr->vendor_value);
1210 *data = attr->attrib_data;
1211 *len = attr->attrib_len - 2;
1212
1213 return (attr->attrib_type);
1214}
1215
1216int
1217rad_put_vendor_addr(struct rad_handle *h, int vendor, int type,
1218 struct in_addr addr)
1219{
1220 return (rad_put_vendor_attr(h, vendor, type, &addr.s_addr,
1221 sizeof addr.s_addr));
1222}
1223
1224int
1225rad_put_vendor_attr(struct rad_handle *h, int vendor, int type,
1226 const void *value, size_t len)
1227{
1228 struct vendor_attribute *attr;
1229 int res;
1230
1231 if (!h->out_created) {
1232 generr(h, "Please call rad_create_request()"
1233 " before putting attributes");
1234 return -1;
1235 }
1236
1237 if ((attr = malloc(len + 6)) == NULL) {
1238 generr(h, "malloc failure (%zu bytes)", len + 6);
1239 return -1;
1240 }
1241
1242 attr->vendor_value = htonl(vendor);
1243 attr->attrib_type = type;
1244 attr->attrib_len = len + 2;
1245 memcpy(attr->attrib_data, value, len);
1246
1247 res = put_raw_attr(h, RAD_VENDOR_SPECIFIC, attr, len + 6);
1248 free(attr);
1249 if (res == 0 && vendor == RAD_VENDOR_MICROSOFT
1250 && (type == RAD_MICROSOFT_MS_CHAP_RESPONSE
1251 || type == RAD_MICROSOFT_MS_CHAP2_RESPONSE)) {
1252 h->chap_pass = 1;
1253 }
1254 return (res);
1255}
1256
1257int
1258rad_put_vendor_int(struct rad_handle *h, int vendor, int type, u_int32_t i)
1259{
1260 u_int32_t value;
1261
1262 value = htonl(i);
1263 return (rad_put_vendor_attr(h, vendor, type, &value, sizeof value));
1264}
1265
1266int
1267rad_put_vendor_string(struct rad_handle *h, int vendor, int type,
1268 const char *str)
1269{
1270 return (rad_put_vendor_attr(h, vendor, type, str, strlen(str)));
1271}
1272
1273ssize_t
1274rad_request_authenticator(struct rad_handle *h, char *buf, size_t len)
1275{
1276 if (len < LEN_AUTH)
1277 return (-1);
1278 memcpy(buf, h->out + POS_AUTH, LEN_AUTH);
1279 if (len > LEN_AUTH)
1280 buf[LEN_AUTH] = '\0';
1281 return (LEN_AUTH);
1282}
1283
1284u_char *
1285rad_demangle(struct rad_handle *h, const void *mangled, size_t mlen)
1286{
1287 char R[LEN_AUTH];
1288 const char *S;
1289 int i, Ppos;
1290 MD5_CTX Context;
1291 u_char b[MD5_DIGEST_LENGTH], *C, *demangled;
1292
1293 if ((mlen % 16 != 0) || mlen > 128) {
1294 generr(h, "Cannot interpret mangled data of length %lu",
1295 (u_long)mlen);
1296 return NULL;
1297 }
1298
1299 C = (u_char *)mangled;
1300
1301 /* We need the shared secret as Salt */
1302 S = rad_server_secret(h);
1303
1304 /* We need the request authenticator */
1305 if (rad_request_authenticator(h, R, sizeof R) != LEN_AUTH) {
1306 generr(h, "Cannot obtain the RADIUS request authenticator");
1307 return NULL;
1308 }
1309
1310 demangled = malloc(mlen);
1311 if (!demangled)
1312 return NULL;
1313
1314 MD5Init(&Context);
1315 MD5Update(&Context, S, strlen(S));
1316 MD5Update(&Context, R, LEN_AUTH);
1317 MD5Final(b, &Context);
1318 Ppos = 0;
1319 while (mlen) {
1320
1321 mlen -= 16;
1322 for (i = 0; i < 16; i++)
1323 demangled[Ppos++] = C[i] ^ b[i];
1324
1325 if (mlen) {
1326 MD5Init(&Context);
1327 MD5Update(&Context, S, strlen(S));
1328 MD5Update(&Context, C, 16);
1329 MD5Final(b, &Context);
1330 }
1331
1332 C += 16;
1333 }
1334
1335 return demangled;
1336}
1337
1338u_char *
1339rad_demangle_mppe_key(struct rad_handle *h, const void *mangled,
1340 size_t mlen, size_t *len)
1341{
1342 char R[LEN_AUTH]; /* variable names as per rfc2548 */
1343 const char *S;
1344 u_char b[MD5_DIGEST_LENGTH], *demangled;
1345 const u_char *A, *C;
1346 MD5_CTX Context;
1347 int Slen, i, Clen, Ppos;
1348 u_char *P;
1349
1350 if (mlen % 16 != SALT_LEN) {
1351 generr(h, "Cannot interpret mangled data of length %lu",
1352 (u_long)mlen);
1353 return NULL;
1354 }
1355
1356 /* We need the RADIUS Request-Authenticator */
1357 if (rad_request_authenticator(h, R, sizeof R) != LEN_AUTH) {
1358 generr(h, "Cannot obtain the RADIUS request authenticator");
1359 return NULL;
1360 }
1361
1362 A = (const u_char *)mangled; /* Salt comes first */
1363 C = (const u_char *)mangled + SALT_LEN; /* Then the ciphertext */
1364 Clen = mlen - SALT_LEN;
1365 S = rad_server_secret(h); /* We need the RADIUS secret */
1366 Slen = strlen(S);
1367 P = alloca(Clen); /* We derive our plaintext */
1368
1369 MD5Init(&Context);
1370 MD5Update(&Context, S, Slen);
1371 MD5Update(&Context, R, LEN_AUTH);
1372 MD5Update(&Context, A, SALT_LEN);
1373 MD5Final(b, &Context);
1374 Ppos = 0;
1375
1376 while (Clen) {
1377 Clen -= 16;
1378
1379 for (i = 0; i < 16; i++)
1380 P[Ppos++] = C[i] ^ b[i];
1381
1382 if (Clen) {
1383 MD5Init(&Context);
1384 MD5Update(&Context, S, Slen);
1385 MD5Update(&Context, C, 16);
1386 MD5Final(b, &Context);
1387 }
1388
1389 C += 16;
1390 }
1391
1392 /*
1393 * The resulting plain text consists of a one-byte length, the text and
1394 * maybe some padding.
1395 */
1396 *len = *P;
1397 if (*len > mlen - 1) {
1398 generr(h, "Mangled data seems to be garbage %zu %zu",
1399 *len, mlen-1);
1400 return NULL;
1401 }
1402
1403 if (*len > MPPE_KEY_LEN * 2) {
1404 generr(h, "Key to long (%zu) for me max. %d",
1405 *len, MPPE_KEY_LEN * 2);
1406 return NULL;
1407 }
1408 demangled = malloc(*len);
1409 if (!demangled)
1410 return NULL;
1411
1412 memcpy(demangled, P + 1, *len);
1413 return demangled;
1414}
1415
1416const char *
1417rad_server_secret(struct rad_handle *h)
1418{
1419 return (h->servers[h->srv].secret);
1420}