radsecproxy.c 84.8 KB
Newer Older
venaas's avatar
 
venaas committed
1
/*
venaas's avatar
venaas committed
2
 * Copyright (C) 2006, 2007 Stig Venaas <venaas@uninett.no>
venaas's avatar
 
venaas committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 */

/* For UDP there is one server instance consisting of udpserverrd and udpserverth
 *              rd is responsible for init and launching wr
 * For TLS there is a server instance that launches tlsserverrd for each TLS peer
 *          each tlsserverrd launches tlsserverwr
 * For each UDP/TLS peer there is clientrd and clientwr, clientwr is responsible
 *          for init and launching rd
 *
 * serverrd will receive a request, processes it and puts it in the requestq of
 *          the appropriate clientwr
 * clientwr monitors its requestq and sends requests
 * clientrd looks for responses, processes them and puts them in the replyq of
 *          the peer the request came from
 * serverwr monitors its reply and sends replies
 *
 * In addition to the main thread, we have:
 * If UDP peers are configured, there will be 2 + 2 * #peers UDP threads
 * If TLS peers are configured, there will initially be 2 * #peers TLS threads
 * For each TLS peer connecting to us there will be 2 more TLS threads
 *       This is only for connected peers
 * Example: With 3 UDP peer and 30 TLS peers, there will be a max of
 *          1 + (2 + 2 * 3) + (2 * 30) + (2 * 30) = 129 threads
*/

venaas's avatar
venaas committed
32
33
#include <sys/socket.h>
#include <netinet/in.h>
venaas's avatar
 
venaas committed
34
#include <netdb.h>
venaas's avatar
venaas committed
35
#include <string.h>
venaas's avatar
 
venaas committed
36
#include <unistd.h>
venaas's avatar
venaas committed
37
#include <sys/time.h>
38
39
#include <sys/types.h>
#include <arpa/inet.h>
venaas's avatar
venaas committed
40
#include <regex.h>
venaas's avatar
venaas committed
41
#include <libgen.h>
venaas's avatar
 
venaas committed
42
43
44
45
46
#include <pthread.h>
#include <openssl/ssl.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/md5.h>
venaas's avatar
venaas committed
47
#include <openssl/hmac.h>
48
#include <openssl/x509v3.h>
venaas's avatar
venaas committed
49
#include "debug.h"
venaas's avatar
venaas committed
50
#include "list.h"
venaas's avatar
venaas committed
51
#include "radsecproxy.h"
venaas's avatar
 
venaas committed
52

53
static struct options options;
54
struct list *clconfs, *srvconfs, *realms, *tlsconfs;
55

56
57
58
59
static int client_udp_count = 0;
static int client_tls_count = 0;
static int server_udp_count = 0;
static int server_tls_count = 0;
venaas's avatar
 
venaas committed
60

venaas's avatar
venaas committed
61
62
static struct clsrvconf *tcp_server_listen;
static struct clsrvconf *udp_server_listen;
63
static struct clsrvconf *udp_accserver_listen;
venaas's avatar
venaas committed
64
static struct replyq *udp_server_replyq = NULL;
venaas's avatar
 
venaas committed
65
static int udp_server_sock = -1;
66
static int udp_accserver_sock = -1;
67
68
static int udp_client4_sock = -1;
static int udp_client6_sock = -1;
venaas's avatar
 
venaas committed
69
70
71
72
73
74
75
76
static pthread_mutex_t *ssl_locks;
static long *ssl_lock_count;
extern int optind;
extern char *optarg;

/* callbacks for making OpenSSL thread safe */
unsigned long ssl_thread_id() {
        return (unsigned long)pthread_self();
venaas's avatar
venaas committed
77
}
venaas's avatar
 
venaas committed
78
79
80
81
82
83
84
85
86

void ssl_locking_callback(int mode, int type, const char *file, int line) {
    if (mode & CRYPTO_LOCK) {
	pthread_mutex_lock(&ssl_locks[type]);
	ssl_lock_count[type]++;
    } else
	pthread_mutex_unlock(&ssl_locks[type]);
}

venaas's avatar
venaas committed
87
88
89
90
91
92
93
94
static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) {
    int pwdlen = strlen(userdata);
    if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */
	return 0;
    memcpy(buf, userdata, pwdlen);
    return pwdlen;
}

95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
static int verify_cb(int ok, X509_STORE_CTX *ctx) {
  char buf[256];
  X509 *err_cert;
  int err, depth;

  err_cert = X509_STORE_CTX_get_current_cert(ctx);
  err = X509_STORE_CTX_get_error(ctx);
  depth = X509_STORE_CTX_get_error_depth(ctx);

  if (depth > MAX_CERT_DEPTH) {
      ok = 0;
      err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
      X509_STORE_CTX_set_error(ctx, err);
  }

  if (!ok) {
      X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
112
      debug(DBG_WARN, "verify error: num=%d:%s:depth=%d:%s", err, X509_verify_cert_error_string(err), depth, buf);
113
114
115
116

      switch (err) {
      case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
	  X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256);
117
	  debug(DBG_WARN, "\tIssuer=%s", buf);
118
119
120
	  break;
      case X509_V_ERR_CERT_NOT_YET_VALID:
      case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
121
	  debug(DBG_WARN, "\tCertificate not yet valid");
122
123
	  break;
      case X509_V_ERR_CERT_HAS_EXPIRED:
124
	  debug(DBG_WARN, "Certificate has expired");
125
126
	  break;
      case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
127
	  debug(DBG_WARN, "Certificate no longer valid (after notAfter)");
128
129
130
	  break;
      }
  }
131
132
133
#ifdef DEBUG  
  printf("certificate verify returns %d\n", ok);
#endif  
134
135
136
  return ok;
}

venaas's avatar
venaas committed
137
int resolvepeer(struct clsrvconf *conf, int ai_flags) {
venaas's avatar
venaas committed
138
    struct addrinfo hints, *addrinfo;
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
    char *slash, *s;
    int plen;

    slash = conf->host ? strchr(conf->host, '/') : NULL;
    if (slash) {
	s = slash + 1;
	if (!*s) {
	    debug(DBG_WARN, "resolvepeer: prefix length must be specified after the / in %s", conf->host);
	    return 0;
	}
	for (; *s; s++)
	    if (*s < '0' || *s > '9') {
		debug(DBG_WARN, "resolvepeer: %s in %s is not a valid prefix length", slash + 1, conf->host);
		return 0;
	    }
	plen = atoi(slash + 1);
	if (plen < 0 || plen > 128) {
	    debug(DBG_WARN, "resolvepeer: %s in %s is not a valid prefix length", slash + 1, conf->host);
	    return 0;
	}
	*slash = '\0';
    }
venaas's avatar
 
venaas committed
161
    memset(&hints, 0, sizeof(hints));
venaas's avatar
venaas committed
162
    hints.ai_socktype = (conf->type == 'T' ? SOCK_STREAM : SOCK_DGRAM);
venaas's avatar
 
venaas committed
163
    hints.ai_family = AF_UNSPEC;
venaas's avatar
venaas committed
164
    hints.ai_flags = ai_flags;
165
166
    if (slash)
	hints.ai_flags |= AI_NUMERICHOST;
venaas's avatar
venaas committed
167
168
    if (getaddrinfo(conf->host, conf->port, &hints, &addrinfo)) {
	debug(DBG_WARN, "resolvepeer: can't resolve %s port %s", conf->host, conf->port);
venaas's avatar
 
venaas committed
169
170
	return 0;
    }
171

172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
    if (slash) {
	*slash = '/';
	switch (addrinfo->ai_family) {
	case AF_INET:
	    if (plen > 32) {
		debug(DBG_WARN, "resolvepeer: prefix length must be <= 32 in %s", conf->host);
		freeaddrinfo(addrinfo);
		return 0;
	    }
	    break;
	case AF_INET6:
	    break;
	default:
	    debug(DBG_WARN, "resolvepeer: prefix must be IPv4 or IPv6 in %s", conf->host);
	    freeaddrinfo(addrinfo);
	    return 0;
	}
	conf->prefixlen = plen;
    } else
	conf->prefixlen = 255;

venaas's avatar
venaas committed
193
194
195
    if (conf->addrinfo)
	freeaddrinfo(conf->addrinfo);
    conf->addrinfo = addrinfo;
venaas's avatar
 
venaas committed
196
197
198
    return 1;
}	  

199
int connecttoserver(struct addrinfo *addrinfo) {
venaas's avatar
 
venaas committed
200
201
    int s;
    struct addrinfo *res;
202
203

    s = -1;
204
    for (res = addrinfo; res; res = res->ai_next) {
venaas's avatar
 
venaas committed
205
206
        s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
        if (s < 0) {
207
            debug(DBG_WARN, "connecttoserver: socket failed");
venaas's avatar
 
venaas committed
208
209
210
211
            continue;
        }
        if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
            break;
212
        debug(DBG_WARN, "connecttoserver: connect failed");
venaas's avatar
 
venaas committed
213
214
215
216
217
218
        close(s);
        s = -1;
    }
    return s;
}	  

venaas's avatar
venaas committed
219
220
221
222
223
224
225
int bindtoaddr(struct addrinfo *addrinfo) {
    int s, on = 1;
    struct addrinfo *res;
    
    for (res = addrinfo; res; res = res->ai_next) {
        s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
        if (s < 0) {
226
            debug(DBG_WARN, "bindtoaddr: socket failed");
venaas's avatar
venaas committed
227
228
229
230
231
            continue;
        }
	setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
	if (!bind(s, res->ai_addr, res->ai_addrlen))
	    return s;
232
	debug(DBG_WARN, "bindtoaddr: bind failed");
venaas's avatar
venaas committed
233
234
235
236
237
        close(s);
    }
    return -1;
}	  

238
239
240
241
242
243
244
245
246
247
248
249
250
/* returns 1 if the len first bits are equal, else 0 */
int prefixmatch(void *a1, void *a2, uint8_t len) {
    static uint8_t mask[] = { 0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe };
    int r, l = len / 8;
    if (l && memcmp(a1, a2, l))
	return 0;
    r = len % 8;
    if (!r)
	return 1;
    return (((uint8_t *)a1)[l] & mask[r]) == (((uint8_t *)a2)[l] & mask[r]);
}

/* returns the config with matching address, or NULL */
venaas's avatar
venaas committed
251
/* if conf argument is not NULL, we only check that one */
252
struct clsrvconf *find_conf(char type, struct sockaddr *addr, struct list *confs, struct clsrvconf *conf) {
venaas's avatar
venaas committed
253
254
255
    struct sockaddr_in6 *sa6 = NULL;
    struct in_addr *a4 = NULL;
    struct addrinfo *res;
venaas's avatar
venaas committed
256
257
    struct list_node *entry;
    
venaas's avatar
venaas committed
258
259
    if (addr->sa_family == AF_INET6) {
        sa6 = (struct sockaddr_in6 *)addr;
260
        if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
venaas's avatar
venaas committed
261
            a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
262
263
	    sa6 = NULL;
	}
venaas's avatar
venaas committed
264
265
266
    } else
	a4 = &((struct sockaddr_in *)addr)->sin_addr;

venaas's avatar
venaas committed
267
    if (conf) {
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
	if (conf->type == type) {
	    if (conf->prefixlen == 255) {
		for (res = conf->addrinfo; res; res = res->ai_next)
		    if ((a4 && res->ai_family == AF_INET &&
			 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
			(sa6 && res->ai_family == AF_INET6 &&
			 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
			return conf;
	    } else {
		res = conf->addrinfo;
		if (res &&
		    ((a4 && res->ai_family == AF_INET &&
		      prefixmatch(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, conf->prefixlen)) ||
		     (sa6 && res->ai_family == AF_INET6 &&
		      prefixmatch(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, conf->prefixlen))))
venaas's avatar
venaas committed
283
		    return conf;
284
285
	    }
	}
venaas's avatar
venaas committed
286
	return NULL;
venaas's avatar
venaas committed
287
    }
venaas's avatar
venaas committed
288
289
290

    for (entry = list_first(confs); entry; entry = list_next(entry)) {	
	conf = (struct clsrvconf *)entry->data;
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
	if (conf->type == type) {
	    if (conf->prefixlen == 255) {
		for (res = conf->addrinfo; res; res = res->ai_next)
		    if ((a4 && res->ai_family == AF_INET &&
			 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
			(sa6 && res->ai_family == AF_INET6 &&
			 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
			return conf;
	    } else {
		res = conf->addrinfo;
		if (res &&
		    ((a4 && res->ai_family == AF_INET &&
		      prefixmatch(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, conf->prefixlen)) ||
		     (sa6 && res->ai_family == AF_INET6 &&
		      prefixmatch(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, conf->prefixlen))))
venaas's avatar
venaas committed
306
		    return conf;
307
308
	    }
	}
venaas's avatar
venaas committed
309
    }    
venaas's avatar
venaas committed
310
311
312
    return NULL;
}

313
struct replyq *newreplyq() {
314
315
316
317
318
    struct replyq *replyq;
    
    replyq = malloc(sizeof(struct replyq));
    if (!replyq)
	debugx(1, DBG_ERR, "malloc failed");
319
    replyq->replies = list_create();
320
321
    if (!replyq->replies)
	debugx(1, DBG_ERR, "malloc failed");
322
323
    pthread_mutex_init(&replyq->mutex, NULL);
    pthread_cond_init(&replyq->cond, NULL);
324
325
326
    return replyq;
}

327
328
329
330
331
332
struct client *addclient(struct clsrvconf *conf) {
    struct client *new = malloc(sizeof(struct client));
    
    if (!new) {
	debug(DBG_ERR, "malloc failed");
	return NULL;
333
334
    }
    if (!conf->clients) {
335
336
337
338
339
	conf->clients = list_create();
	if (!conf->clients) {
	    debug(DBG_ERR, "malloc failed");
	    return NULL;
	}
340
    }
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
    
    memset(new, 0, sizeof(struct client));
    new->conf = conf;
    new->replyq = conf->type == 'T' ? newreplyq() : udp_server_replyq;

    list_push(conf->clients, new);
    return new;
}

void removeclient(struct client *client) {
    if (!client || !client->conf->clients)
	return;

    list_removedata(client->conf->clients, client);
    free(client);
356
357
358
}

void addserver(struct clsrvconf *conf) {
359
360
    int on = 1;
    
361
    if (conf->servers)
362
	debugx(1, DBG_ERR, "addserver: currently works with just one server per conf");
363
364
365
366
367
368
369
    
    conf->servers = malloc(sizeof(struct server));
    if (!conf->servers)
	debugx(1, DBG_ERR, "malloc failed");
    memset(conf->servers, 0, sizeof(struct server));
    conf->servers->conf = conf;

370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
    if (conf->type == 'U') {
	switch (conf->addrinfo->ai_family) {
	case AF_INET:
	    if (udp_client4_sock < 0) {
		struct sockaddr_in sa;
		memset(&sa, 0, sizeof(sa));
		udp_client4_sock = socket(AF_INET, conf->addrinfo->ai_socktype, conf->addrinfo->ai_protocol);
		if (udp_client4_sock < 0)
		    debugx(1, DBG_ERR, "addserver: failed to create client socket for server %s", conf->host);
		if (!bind(udp_client4_sock, (struct sockaddr *)&sa, sizeof(sa)))
		    debugx(1, DBG_ERR, "addserver: failed to bind client socket for server %s", conf->host);
	    }
	    conf->servers->sock = udp_client4_sock;
	case AF_INET6:
	    if (udp_client6_sock < 0) {
		struct sockaddr_in6 sa;
		memset(&sa, 0, sizeof(sa));
		udp_client6_sock = socket(AF_INET6, conf->addrinfo->ai_socktype, conf->addrinfo->ai_protocol);
		if (udp_client6_sock < 0)
		    debugx(1, DBG_ERR, "addserver: failed to create client socket for server %s", conf->host);
#ifdef IPV6_V6ONLY
		setsockopt(udp_client6_sock, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&on, sizeof(on));
#endif		
		if (!bind(udp_client6_sock, (struct sockaddr *)&sa, sizeof(sa)))
		    debugx(1, DBG_ERR, "addserver: failed to bind client socket for server %s", conf->host);
	    }
	    conf->servers->sock = udp_client6_sock;
	default:
	    debugx(1, DBG_ERR, "addserver: unsupported address family");
	}
	
    } else
	conf->servers->sock = -1;
    
404
405
406
407
408
409
410
411
412
    pthread_mutex_init(&conf->servers->lock, NULL);
    conf->servers->requests = calloc(MAX_REQUESTS, sizeof(struct request));
    if (!conf->servers->requests)
	debugx(1, DBG_ERR, "malloc failed");
    conf->servers->newrq = 0;
    pthread_mutex_init(&conf->servers->newrq_mutex, NULL);
    pthread_cond_init(&conf->servers->newrq_cond, NULL);
}

413
/* exactly one of client and server must be non-NULL */
venaas's avatar
venaas committed
414
/* should probably take peer list (client(s) or server(s)) as argument instead */
venaas's avatar
 
venaas committed
415
416
/* if *peer == NULL we return who we received from, else require it to be from peer */
/* return from in sa if not NULL */
417
unsigned char *radudpget(int s, struct client **client, struct server **server, struct sockaddr_storage *sa) {
venaas's avatar
venaas committed
418
    int cnt, len;
venaas's avatar
 
venaas committed
419
420
421
    unsigned char buf[65536], *rad;
    struct sockaddr_storage from;
    socklen_t fromlen = sizeof(from);
venaas's avatar
venaas committed
422
    struct clsrvconf *p;
venaas's avatar
venaas committed
423
424
    struct list_node *node;
    
venaas's avatar
 
venaas committed
425
426
427
    for (;;) {
	cnt = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from, &fromlen);
	if (cnt == -1) {
428
	    debug(DBG_WARN, "radudpget: recv failed");
venaas's avatar
 
venaas committed
429
430
	    continue;
	}
venaas's avatar
venaas committed
431
	debug(DBG_DBG, "radudpget: got %d bytes from %s", cnt, addr2string((struct sockaddr *)&from, fromlen));
venaas's avatar
 
venaas committed
432
433

	if (cnt < 20) {
434
	    debug(DBG_WARN, "radudpget: packet too small");
venaas's avatar
 
venaas committed
435
436
437
438
	    continue;
	}
    
	len = RADLEN(buf);
439
440
441
442
	if (len < 20) {
	    debug(DBG_WARN, "radudpget: length too small");
	    continue;
	}
venaas's avatar
 
venaas committed
443
444

	if (cnt < len) {
445
	    debug(DBG_WARN, "radudpget: packet smaller than length field in radius header");
venaas's avatar
 
venaas committed
446
447
448
	    continue;
	}
	if (cnt > len)
venaas's avatar
venaas committed
449
	    debug(DBG_DBG, "radudpget: packet was padded with %d bytes", cnt - len);
venaas's avatar
 
venaas committed
450

venaas's avatar
venaas committed
451
	if (client)
venaas's avatar
venaas committed
452
	    if (*client)
453
		p = find_conf('U', (struct sockaddr *)&from, NULL, (*client)->conf);
venaas's avatar
venaas committed
454
	    else
455
		p = find_conf('U', (struct sockaddr *)&from, clconfs, NULL);
venaas's avatar
venaas committed
456
	else
venaas's avatar
venaas committed
457
	    if (*server)
458
		p = find_conf('U', (struct sockaddr *)&from, NULL, (*server)->conf);
venaas's avatar
venaas committed
459
	    else
460
		p = find_conf('U', (struct sockaddr *)&from, srvconfs, NULL);
venaas's avatar
venaas committed
461
462

	if (!p) {
463
	    debug(DBG_WARN, "radudpget: got packet from wrong or unknown UDP peer, ignoring");
venaas's avatar
 
venaas committed
464
465
	    continue;
	}
466
	
venaas's avatar
 
venaas committed
467
	rad = malloc(len);
468
469
470
471
472
473
	if (!rad) {
	    debug(DBG_ERR, "radudpget: malloc failed");
	    continue;
	}
	
	if (client && !*client) {
474
	    node = list_first(p->clients);
venaas's avatar
venaas committed
475
	    *client = node ? (struct client *)node->data : addclient(p);
476
	    if (!*client) {
477
478
479
480
481
482
483
		free(rad);
		continue;
	    }
	} else if (server && !*server)
	    *server = p->servers;
	
	break;
venaas's avatar
 
venaas committed
484
485
486
487
488
489
490
    }
    memcpy(rad, buf, len);
    if (sa)
	*sa = from;
    return rad;
}

491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
int subjectaltnameaddr(X509 *cert, int family, struct in6_addr *addr) {
    int loc, i, l, n, r = 0;
    char *v;
    X509_EXTENSION *ex;
    STACK_OF(GENERAL_NAME) *alt;
    GENERAL_NAME *gn;
    
    debug(DBG_DBG, "subjectaltnameaddr");
    
    loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
    if (loc < 0)
	return r;
    
    ex = X509_get_ext(cert, loc);
    alt = X509V3_EXT_d2i(ex);
    if (!alt)
	return r;
    
    n = sk_GENERAL_NAME_num(alt);
    for (i = 0; i < n; i++) {
	gn = sk_GENERAL_NAME_value(alt, i);
	if (gn->type != GEN_IPADD)
	    continue;
	r = -1;
	v = (char *)ASN1_STRING_data(gn->d.ia5);
	l = ASN1_STRING_length(gn->d.ia5);
	if (((family == AF_INET && l == sizeof(struct in_addr)) || (family == AF_INET6 && l == sizeof(struct in6_addr)))
	    && !memcmp(v, &addr, l)) {
	    r = 1;
	    break;
	}
    }
    GENERAL_NAMES_free(alt);
    return r;
}

int subjectaltnameregexp(X509 *cert, int type, char *exact,  regex_t *regex) {
    int loc, i, l, n, r = 0;
    char *s, *v;
    X509_EXTENSION *ex;
    STACK_OF(GENERAL_NAME) *alt;
    GENERAL_NAME *gn;
    
    debug(DBG_DBG, "subjectaltnameregexp");
    
    loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
    if (loc < 0)
	return r;
    
    ex = X509_get_ext(cert, loc);
    alt = X509V3_EXT_d2i(ex);
    if (!alt)
	return r;
    
    n = sk_GENERAL_NAME_num(alt);
    for (i = 0; i < n; i++) {
	gn = sk_GENERAL_NAME_value(alt, i);
	if (gn->type != type)
	    continue;
	r = -1;
	v = (char *)ASN1_STRING_data(gn->d.ia5);
	l = ASN1_STRING_length(gn->d.ia5);
	if (l <= 0)
	    continue;
#ifdef DEBUG
	printfchars(NULL, gn->type == GEN_DNS ? "dns" : "uri", NULL, v, l);
#endif	
	if (exact) {
	    if (memcmp(v, exact, l))
		continue;
	} else {
	    s = stringcopy((char *)v, l);
	    if (!s) {
		debug(DBG_ERR, "malloc failed");
		continue;
	    }
	    if (regexec(regex, s, 0, NULL, 0)) {
		free(s);
		continue;
	    }
	    free(s);
	}
	r = 1;
	break;
    }
    GENERAL_NAMES_free(alt);
    return r;
}

venaas's avatar
venaas committed
580
int tlsverifycert(SSL *ssl, struct clsrvconf *conf) {
581
    int l, loc, r;
582
583
584
    X509 *cert;
    X509_NAME *nm;
    X509_NAME_ENTRY *e;
585
586
587
    ASN1_STRING *s;
    char *v;
    uint8_t type = 0; /* 0 for DNS, AF_INET for IPv4, AF_INET6 for IPv6 */
588
    unsigned long error;
589
590
    struct in6_addr addr;
    
venaas's avatar
venaas committed
591
    if (SSL_get_verify_result(ssl) != X509_V_OK) {
592
	debug(DBG_ERR, "tlsverifycert: basic validation failed");
593
	while ((error = ERR_get_error()))
594
	    debug(DBG_ERR, "tlsverifycert: TLS: %s", ERR_error_string(error, NULL));
595
596
	return 0;
    }
597

venaas's avatar
venaas committed
598
    cert = SSL_get_peer_certificate(ssl);
599
    if (!cert) {
600
	debug(DBG_ERR, "tlsverifycert: failed to obtain certificate");
601
	return 0;
venaas's avatar
venaas committed
602
    }
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
    
    if (inet_pton(AF_INET, conf->host, &addr))
	type = AF_INET;
    else if (inet_pton(AF_INET6, conf->host, &addr))
	type = AF_INET6;

    r = type ? subjectaltnameaddr(cert, type, &addr) : subjectaltnameregexp(cert, GEN_DNS, conf->host, NULL);
    if (r) {
	if (r < 0) {
	    X509_free(cert);
	    debug(DBG_DBG, "tlsverifycert: No subjectaltname matching %s %s", type ? "address" : "host", conf->host);
	    return 0;
	}
	debug(DBG_DBG, "tlsverifycert: Found subjectaltname matching %s %s", type ? "address" : "host", conf->host);
    } else {
	nm = X509_get_subject_name(cert);
	loc = -1;
	for (;;) {
	    loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc);
	    if (loc == -1)
		break;
	    e = X509_NAME_get_entry(nm, loc);
	    s = X509_NAME_ENTRY_get_data(e);
	    v = (char *) ASN1_STRING_data(s);
	    l = ASN1_STRING_length(s);
	    if (l < 0)
		continue;
630
#ifdef DEBUG
631
632
633
634
635
636
637
	    printfchars(NULL, "cn", NULL, v, l);
#endif	    
	    if (l == strlen(conf->host) && !strncasecmp(conf->host, v, l)) {
		r = 1;
		debug(DBG_DBG, "tlsverifycert: Found cn matching host %s", conf->host);
		break;
	    }
638
	}
639
640
641
642
643
644
645
646
647
648
649
650
	if (!r) {
	    X509_free(cert);
	    debug(DBG_ERR, "tlsverifycert: cn not matching host %s", conf->host);
	    return 0;
	}
    }
    if (conf->certuriregex) {
	r = subjectaltnameregexp(cert, GEN_URI, NULL, conf->certuriregex);
	if (r < 1) {
	    debug(DBG_DBG, "tlsverifycert: subjectaltname URI not matching regex");
	    X509_free(cert);
	    return 0;
651
	}
652
	debug(DBG_DBG, "tlsverifycert: subjectaltname URI matching regex");
653
654
    }
    X509_free(cert);
655
    return 1;
656
657
}

658
void tlsconnect(struct server *server, struct timeval *when, char *text) {
venaas's avatar
venaas committed
659
660
    struct timeval now;
    time_t elapsed;
venaas's avatar
venaas committed
661

venaas's avatar
venaas committed
662
    debug(DBG_DBG, "tlsconnect called from %s", text);
663
664
    pthread_mutex_lock(&server->lock);
    if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
venaas's avatar
 
venaas committed
665
	/* already reconnected, nothing to do */
venaas's avatar
venaas committed
666
	debug(DBG_DBG, "tlsconnect(%s): seems already reconnected", text);
667
	pthread_mutex_unlock(&server->lock);
venaas's avatar
 
venaas committed
668
669
670
	return;
    }

venaas's avatar
venaas committed
671
    debug(DBG_DBG, "tlsconnect %s", text);
venaas's avatar
venaas committed
672

venaas's avatar
 
venaas committed
673
    for (;;) {
venaas's avatar
venaas committed
674
	gettimeofday(&now, NULL);
675
676
677
	elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
	if (server->connectionok) {
	    server->connectionok = 0;
venaas's avatar
venaas committed
678
679
680
	    sleep(10);
	} else if (elapsed < 5)
	    sleep(10);
venaas's avatar
venaas committed
681
	else if (elapsed < 300) {
venaas's avatar
venaas committed
682
	    debug(DBG_INFO, "tlsconnect: sleeping %lds", elapsed);
venaas's avatar
venaas committed
683
	    sleep(elapsed);
venaas's avatar
venaas committed
684
685
686
	} else if (elapsed < 100000) {
	    debug(DBG_INFO, "tlsconnect: sleeping %ds", 600);
	    sleep(600);
venaas's avatar
venaas committed
687
	} else
venaas's avatar
venaas committed
688
	    server->lastconnecttry.tv_sec = now.tv_sec;  /* no sleep at startup */
venaas's avatar
venaas committed
689
	debug(DBG_WARN, "tlsconnect: trying to open TLS connection to %s port %s", server->conf->host, server->conf->port);
690
691
	if (server->sock >= 0)
	    close(server->sock);
venaas's avatar
venaas committed
692
	if ((server->sock = connecttoserver(server->conf->addrinfo)) < 0) {
693
	    debug(DBG_ERR, "tlsconnect: connecttoserver failed");
venaas's avatar
venaas committed
694
	    continue;
695
696
	}
	
venaas's avatar
venaas committed
697
	SSL_free(server->ssl);
venaas's avatar
venaas committed
698
	server->ssl = SSL_new(server->conf->ssl_ctx);
venaas's avatar
venaas committed
699
	SSL_set_fd(server->ssl, server->sock);
venaas's avatar
venaas committed
700
	if (SSL_connect(server->ssl) > 0 && tlsverifycert(server->ssl, server->conf))
venaas's avatar
 
venaas committed
701
702
	    break;
    }
venaas's avatar
venaas committed
703
    debug(DBG_WARN, "tlsconnect: TLS connection to %s port %s up", server->conf->host, server->conf->port);
venaas's avatar
venaas committed
704
    gettimeofday(&server->lastconnecttry, NULL);
705
    pthread_mutex_unlock(&server->lock);
venaas's avatar
 
venaas committed
706
707
708
709
710
711
712
713
714
715
}

unsigned char *radtlsget(SSL *ssl) {
    int cnt, total, len;
    unsigned char buf[4], *rad;

    for (;;) {
	for (total = 0; total < 4; total += cnt) {
	    cnt = SSL_read(ssl, buf + total, 4 - total);
	    if (cnt <= 0) {
716
		debug(DBG_ERR, "radtlsget: connection lost");
717
		if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) {
venaas's avatar
venaas committed
718
		    /* remote end sent close_notify, send one back */
719
720
		    SSL_shutdown(ssl);
		}
venaas's avatar
 
venaas committed
721
722
723
724
725
726
727
		return NULL;
	    }
	}

	len = RADLEN(buf);
	rad = malloc(len);
	if (!rad) {
728
	    debug(DBG_ERR, "radtlsget: malloc failed");
venaas's avatar
 
venaas committed
729
730
731
732
733
734
735
	    continue;
	}
	memcpy(rad, buf, 4);

	for (; total < len; total += cnt) {
	    cnt = SSL_read(ssl, rad + total, len - total);
	    if (cnt <= 0) {
736
		debug(DBG_ERR, "radtlsget: connection lost");
737
		if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) {
venaas's avatar
venaas committed
738
		    /* remote end sent close_notify, send one back */
739
740
		    SSL_shutdown(ssl);
		}
venaas's avatar
 
venaas committed
741
742
743
744
745
746
747
748
749
		free(rad);
		return NULL;
	    }
	}
    
	if (total >= 20)
	    break;
	
	free(rad);
750
	debug(DBG_WARN, "radtlsget: packet smaller than minimum radius size");
venaas's avatar
 
venaas committed
751
752
    }
    
venaas's avatar
venaas committed
753
    debug(DBG_DBG, "radtlsget: got %d bytes", total);
venaas's avatar
 
venaas committed
754
755
756
    return rad;
}

757
int clientradput(struct server *server, unsigned char *rad) {
venaas's avatar
venaas committed
758
    int cnt;
venaas's avatar
 
venaas committed
759
760
    size_t len;
    unsigned long error;
venaas's avatar
venaas committed
761
    struct timeval lastconnecttry;
762
    struct clsrvconf *conf = server->conf;
venaas's avatar
venaas committed
763
    
venaas's avatar
 
venaas committed
764
    len = RADLEN(rad);
765
766
767
    if (conf->type == 'U') {
	if (sendto(server->sock, rad, len, 0, conf->addrinfo->ai_addr, conf->addrinfo->ai_addrlen) >= 0) {
	    debug(DBG_DBG, "clienradput: sent UDP of length %d to %s port %s", len, conf->host, conf->port);
venaas's avatar
 
venaas committed
768
769
	    return 1;
	}
770
	debug(DBG_WARN, "clientradput: send failed");
venaas's avatar
 
venaas committed
771
772
773
	return 0;
    }

774
    lastconnecttry = server->lastconnecttry;
venaas's avatar
venaas committed
775
    while ((cnt = SSL_write(server->ssl, rad, len)) <= 0) {
venaas's avatar
 
venaas committed
776
	while ((error = ERR_get_error()))
777
	    debug(DBG_ERR, "clientradput: TLS: %s", ERR_error_string(error, NULL));
778
779
	tlsconnect(server, &lastconnecttry, "clientradput");
	lastconnecttry = server->lastconnecttry;
venaas's avatar
 
venaas committed
780
    }
venaas's avatar
venaas committed
781

782
    server->connectionok = 1;
783
    debug(DBG_DBG, "clientradput: Sent %d bytes, Radius packet of length %d to TLS peer %s", cnt, len, conf->host);
venaas's avatar
 
venaas committed
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
    return 1;
}

int radsign(unsigned char *rad, unsigned char *sec) {
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned int md_len;
    int result;
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

    result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
	EVP_DigestUpdate(&mdctx, rad, RADLEN(rad)) &&
venaas's avatar
venaas committed
802
	EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) &&
venaas's avatar
 
venaas committed
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
	EVP_DigestFinal_ex(&mdctx, rad + 4, &md_len) &&
	md_len == 16);
    pthread_mutex_unlock(&lock);
    return result;
}

int validauth(unsigned char *rad, unsigned char *reqauth, unsigned char *sec) {
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned char hash[EVP_MAX_MD_SIZE];
    unsigned int len;
    int result;
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

    len = RADLEN(rad);
    
    result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
	      EVP_DigestUpdate(&mdctx, rad, 4) &&
	      EVP_DigestUpdate(&mdctx, reqauth, 16) &&
	      (len <= 20 || EVP_DigestUpdate(&mdctx, rad + 20, len - 20)) &&
venaas's avatar
venaas committed
829
	      EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) &&
venaas's avatar
 
venaas committed
830
831
832
833
834
835
836
	      EVP_DigestFinal_ex(&mdctx, hash, &len) &&
	      len == 16 &&
	      !memcmp(hash, rad + 4, 16));
    pthread_mutex_unlock(&lock);
    return result;
}
	      
venaas's avatar
venaas committed
837
int checkmessageauth(unsigned char *rad, uint8_t *authattr, char *secret) {
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static HMAC_CTX hmacctx;
    unsigned int md_len;
    uint8_t auth[16], hash[EVP_MAX_MD_SIZE];
    
    pthread_mutex_lock(&lock);
    if (first) {
	HMAC_CTX_init(&hmacctx);
	first = 0;
    }

    memcpy(auth, authattr, 16);
    memset(authattr, 0, 16);
    md_len = 0;
    HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL);
    HMAC_Update(&hmacctx, rad, RADLEN(rad));
    HMAC_Final(&hmacctx, hash, &md_len);
venaas's avatar
venaas committed
856
    memcpy(authattr, auth, 16);
857
    if (md_len != 16) {
858
	debug(DBG_WARN, "message auth computation failed");
859
860
861
862
863
	pthread_mutex_unlock(&lock);
	return 0;
    }

    if (memcmp(auth, hash, 16)) {
864
	debug(DBG_WARN, "message authenticator, wrong value");
865
866
867
868
869
870
871
872
	pthread_mutex_unlock(&lock);
	return 0;
    }	
	
    pthread_mutex_unlock(&lock);
    return 1;
}

venaas's avatar
venaas committed
873
int createmessageauth(unsigned char *rad, unsigned char *authattrval, char *secret) {
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static HMAC_CTX hmacctx;
    unsigned int md_len;

    if (!authattrval)
	return 1;
    
    pthread_mutex_lock(&lock);
    if (first) {
	HMAC_CTX_init(&hmacctx);
	first = 0;
    }

    memset(authattrval, 0, 16);
    md_len = 0;
    HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL);
    HMAC_Update(&hmacctx, rad, RADLEN(rad));
    HMAC_Final(&hmacctx, authattrval, &md_len);
    if (md_len != 16) {
894
	debug(DBG_WARN, "message auth computation failed");
895
896
897
898
899
900
901
902
	pthread_mutex_unlock(&lock);
	return 0;
    }

    pthread_mutex_unlock(&lock);
    return 1;
}

903
unsigned char *attrget(unsigned char *attrs, int length, uint8_t type) {
904
    while (length > 1) {
venaas's avatar
venaas committed
905
	if (ATTRTYPE(attrs) == type)
906
	    return attrs;
venaas's avatar
venaas committed
907
908
	length -= ATTRLEN(attrs);
	attrs += ATTRLEN(attrs);
909
910
911
912
    }
    return NULL;
}

913
914
915
916
917
918
919
void freerqdata(struct request *rq) {
    if (rq->origusername)
	free(rq->origusername);
    if (rq->buf)
	free(rq->buf);
}

venaas's avatar
venaas committed
920
void sendrq(struct server *to, struct request *rq) {
venaas's avatar
 
venaas committed
921
    int i;
922
    uint8_t *attr;
923

venaas's avatar
 
venaas committed
924
    pthread_mutex_lock(&to->newrq_mutex);
venaas's avatar
venaas committed
925
926
    /* might simplify if only try nextid, might be ok */
    for (i = to->nextid; i < MAX_REQUESTS; i++)
venaas's avatar
 
venaas committed
927
928
929
	if (!to->requests[i].buf)
	    break;
    if (i == MAX_REQUESTS) {
venaas's avatar
venaas committed
930
931
932
933
	for (i = 0; i < to->nextid; i++)
	    if (!to->requests[i].buf)
		break;
	if (i == to->nextid) {
934
	    debug(DBG_WARN, "No room in queue, dropping request");
935
	    freerqdata(rq);
venaas's avatar
venaas committed
936
937
938
	    pthread_mutex_unlock(&to->newrq_mutex);
	    return;
	}
venaas's avatar
 
venaas committed
939
    }
venaas's avatar
venaas committed
940
    
venaas's avatar
 
venaas committed
941
    rq->buf[1] = (char)i;
942

943
    attr = attrget(rq->buf + 20, RADLEN(rq->buf) - 20, RAD_Attr_Message_Authenticator);
venaas's avatar
venaas committed
944
    if (attr && !createmessageauth(rq->buf, ATTRVAL(attr), to->conf->secret)) {
945
	freerqdata(rq);
946
	pthread_mutex_unlock(&to->newrq_mutex);
947
	return;
948
    }
venaas's avatar
venaas committed
949

venaas's avatar
venaas committed
950
    debug(DBG_DBG, "sendrq: inserting packet with id %d in queue for %s", i, to->conf->host);
venaas's avatar
 
venaas committed
951
    to->requests[i] = *rq;
952
    to->nextid = i + 1;
venaas's avatar
 
venaas committed
953
954
955

    if (!to->newrq) {
	to->newrq = 1;
venaas's avatar
venaas committed
956
	debug(DBG_DBG, "signalling client writer");
venaas's avatar
 
venaas committed
957
958
959
960
961
	pthread_cond_signal(&to->newrq_cond);
    }
    pthread_mutex_unlock(&to->newrq_mutex);
}

venaas's avatar
venaas committed
962
void sendreply(struct client *to, unsigned char *buf, struct sockaddr_storage *tosa) {
963
964
    struct reply *reply;
    uint8_t first;
venaas's avatar
 
venaas committed
965
    
venaas's avatar
venaas committed
966
    if (!radsign(buf, (unsigned char *)to->conf->secret)) {
venaas's avatar
venaas committed
967
968
969
970
	free(buf);
	debug(DBG_WARN, "sendreply: failed to sign message");
	return;
    }
971
972
973

    reply = malloc(sizeof(struct reply));
    if (!reply) {
974
	free(buf);
975
	debug(DBG_ERR, "sendreply: malloc failed");
venaas's avatar
 
venaas committed
976
977
	return;
    }
978
979
    memset(reply, 0, sizeof(struct reply));
    reply->buf = buf;
venaas's avatar
 
venaas committed
980
    if (tosa)
981
982
983
	reply->tosa = *tosa;
    
    pthread_mutex_lock(&to->replyq->mutex);
venaas's avatar
 
venaas committed
984

985
986
987
988
989
990
991
992
993
994
995
    first = list_first(to->replyq->replies) == NULL;
    
    if (!list_push(to->replyq->replies, reply)) {
	pthread_mutex_unlock(&to->replyq->mutex);
	free(reply);
	free(buf);
	debug(DBG_ERR, "sendreply: malloc failed");
	return;
    }
    
    if (first) {
996
	debug(DBG_DBG, "signalling server writer");
997
	pthread_cond_signal(&to->replyq->cond);
venaas's avatar
 
venaas committed
998
    }
999
    pthread_mutex_unlock(&to->replyq->mutex);
venaas's avatar
 
venaas committed
1000
1001
}

venaas's avatar
venaas committed
1002
int pwdencrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) {
venaas's avatar
venaas committed
1003
1004
1005
1006
1007
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned char hash[EVP_MAX_MD_SIZE], *input;
    unsigned int md_len;
venaas's avatar
venaas committed
1008
    uint8_t i, offset = 0, out[128];
venaas's avatar
venaas committed
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

    input = auth;
    for (;;) {
	if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
venaas's avatar
venaas committed
1019
	    !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) ||
venaas's avatar
venaas committed
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
	    !EVP_DigestUpdate(&mdctx, input, 16) ||
	    !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
	    md_len != 16) {
	    pthread_mutex_unlock(&lock);
	    return 0;
	}
	for (i = 0; i < 16; i++)
	    out[offset + i] = hash[i] ^ in[offset + i];
	input = out + offset - 16;
	offset += 16;
	if (offset == len)
	    break;
    }
venaas's avatar
venaas committed
1033
    memcpy(in, out, len);
venaas's avatar
venaas committed
1034
1035
1036
1037
    pthread_mutex_unlock(&lock);
    return 1;
}

venaas's avatar
venaas committed
1038
int pwddecrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) {
venaas's avatar
 
venaas committed
1039
1040
1041
1042
1043
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned char hash[EVP_MAX_MD_SIZE], *input;
    unsigned int md_len;
venaas's avatar
venaas committed
1044
    uint8_t i, offset = 0, out[128];
venaas's avatar
 
venaas committed
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

    input = auth;
    for (;;) {
	if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
venaas's avatar
venaas committed
1055
	    !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) ||
venaas's avatar
 
venaas committed
1056
1057
1058
1059
1060
1061
1062
	    !EVP_DigestUpdate(&mdctx, input, 16) ||
	    !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
	    md_len != 16) {
	    pthread_mutex_unlock(&lock);
	    return 0;
	}
	for (i = 0; i < 16; i++)
venaas's avatar
venaas committed
1063
1064
	    out[offset + i] = hash[i] ^ in[offset + i];
	input = in + offset;
venaas's avatar
 
venaas committed
1065
	offset += 16;
venaas's avatar
venaas committed
1066
	if (offset == len)
venaas's avatar
 
venaas committed
1067
1068
	    break;
    }
venaas's avatar
venaas committed
1069
    memcpy(in, out, len);
venaas's avatar
 
venaas committed
1070
1071
1072
1073
    pthread_mutex_unlock(&lock);
    return 1;
}

venaas's avatar
venaas committed
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
int msmppencrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) {
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned char hash[EVP_MAX_MD_SIZE];
    unsigned int md_len;
    uint8_t i, offset;
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

1088
1089
1090
1091
#if 0
    printfchars(NULL, "msppencrypt auth in", "%02x ", auth, 16);
    printfchars(NULL, "msppencrypt salt in", "%02x ", salt, 2);
    printfchars(NULL, "msppencrypt in", "%02x ", text, len);
venaas's avatar
venaas committed
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
#endif
    
    if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
	!EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
	!EVP_DigestUpdate(&mdctx, auth, 16) ||
	!EVP_DigestUpdate(&mdctx, salt, 2) ||
	!EVP_DigestFinal_ex(&mdctx, hash, &md_len)) {
	pthread_mutex_unlock(&lock);
	return 0;
    }

#if 0    
1104
    printfchars(NULL, "msppencrypt hash", "%02x ", hash, 16);
venaas's avatar
venaas committed
1105
1106
1107
1108
1109
1110
#endif
    
    for (i = 0; i < 16; i++)
	text[i] ^= hash[i];
    
    for (offset = 16; offset < len; offset += 16) {
venaas's avatar
venaas committed
1111
#if 0	
venaas's avatar
venaas committed
1112
	printf("text + offset - 16 c(%d): ", offset / 16);
1113
	printfchars(NULL, NULL, "%02x ", text + offset - 16, 16);
venaas's avatar
venaas committed
1114
#endif
venaas's avatar
venaas committed
1115
1116
1117
1118
1119
1120
1121
1122
	if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
	    !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
	    !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) ||
	    !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
	    md_len != 16) {
	    pthread_mutex_unlock(&lock);
	    return 0;
	}
1123
1124
#if 0
	printfchars(NULL, "msppencrypt hash", "%02x ", hash, 16);
venaas's avatar
venaas committed
1125
1126
1127
1128
1129
1130
1131
#endif    
	
	for (i = 0; i < 16; i++)
	    text[offset + i] ^= hash[i];
    }
    
#if 0
1132
    printfchars(NULL, "msppencrypt out", "%02x ", text, len);
venaas's avatar
venaas committed
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
#endif

    pthread_mutex_unlock(&lock);
    return 1;
}

int msmppdecrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) {
    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
    static unsigned char first = 1;
    static EVP_MD_CTX mdctx;
    unsigned char hash[EVP_MAX_MD_SIZE];
    unsigned int md_len;
    uint8_t i, offset;
    char plain[255];
    
    pthread_mutex_lock(&lock);
    if (first) {
	EVP_MD_CTX_init(&mdctx);
	first = 0;
    }

1154
1155
1156
1157
#if 0
    printfchars(NULL, "msppdecrypt auth in", "%02x ", auth, 16);
    printfchars(NULL, "msppdecrypt salt in", "%02x ", salt, 2);
    printfchars(NULL, "msppdecrypt in", "%02x ", text, len);
venaas's avatar
venaas committed
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
#endif
    
    if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
	!EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
	!EVP_DigestUpdate(&mdctx, auth, 16) ||
	!EVP_DigestUpdate(&mdctx, salt, 2) ||
	!EVP_DigestFinal_ex(&mdctx, hash, &md_len)) {
	pthread_mutex_unlock(&lock);
	return 0;
    }

#if 0    
1170
    printfchars(NULL, "msppdecrypt hash", "%02x ", hash, 16);
venaas's avatar
venaas committed
1171
1172
1173
1174
1175
1176
1177
1178
#endif
    
    for (i = 0; i < 16; i++)
	plain[i] = text[i] ^ hash[i];
    
    for (offset = 16; offset < len; offset += 16) {
#if 0 	
	printf("text + offset - 16 c(%d): ", offset / 16);
1179
	printfchars(NULL, NULL, "%02x ", text + offset - 16, 16);
venaas's avatar
venaas committed
1180
1181
1182
1183
1184
1185
1186
1187
1188
#endif
	if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
	    !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
	    !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) ||
	    !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
	    md_len != 16) {
	    pthread_mutex_unlock(&lock);
	    return 0;
	}
1189
1190
#if 0
	printfchars(NULL, "msppdecrypt hash", "%02x ", hash, 16);
venaas's avatar
venaas committed
1191
1192
#endif    

1193
1194
	for (i = 0; i < 16; i++)
	    plain[offset + i] = text[offset + i] ^ hash[i];
venaas's avatar
venaas committed
1195
1196
1197
1198
    }

    memcpy(text, plain, len);
#if 0
1199
    printfchars(NULL, "msppdecrypt out", "%02x ", text, len);
venaas's avatar
venaas committed
1200
1201
1202
1203
1204
1205
#endif

    pthread_mutex_unlock(&lock);
    return 1;
}

venaas's avatar
venaas committed
1206
struct realm *id2realm(char *id, uint8_t len) {
venaas's avatar
venaas committed
1207
1208
1209
1210
1211
1212
1213
1214
    struct list_node *entry;
    struct realm *realm;
    
    for (entry = list_first(realms); entry; entry = list_next(entry)) {
	realm = (struct realm *)entry->data;
	if (!regexec(&realm->regex, id, 0, NULL, 0)) {
	    debug(DBG_DBG, "found matching realm: %s", realm->name);
	    return realm;
venaas's avatar
venaas committed
1215
	}
venaas's avatar
venaas committed
1216
    }
venaas's avatar
venaas committed
1217
    return NULL;
venaas's avatar
venaas committed
1218
1219
}

venaas's avatar
venaas committed
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
int rqinqueue(struct server *to, struct client *from, uint8_t id) {
    int i;
    
    pthread_mutex_lock(&to->newrq_mutex);
    for (i = 0; i < MAX_REQUESTS; i++)
	if (to->requests[i].buf && to->requests[i].origid == id && to->requests[i].from == from)
	    break;
    pthread_mutex_unlock(&to->newrq_mutex);
    
    return i < MAX_REQUESTS;
}
1231