Annotation of src/usr.bin/ssh/ssh-agent.c, Revision 1.17
1.17 ! markus 1: /* $OpenBSD: ssh-agent.c,v 1.16 1999/10/28 20:41:23 markus Exp $ */
1.15 markus 2:
1.1 deraadt 3: /*
4:
5: ssh-agent.c
6:
7: Author: Tatu Ylonen <ylo@cs.hut.fi>
8:
9: Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
10: All rights reserved
11:
12: Created: Wed Mar 29 03:46:59 1995 ylo
13:
14: The authentication agent program.
15:
16: */
17:
18: #include "includes.h"
1.17 ! markus 19: RCSID("$OpenBSD: ssh-agent.c,v 1.16 1999/10/28 20:41:23 markus Exp $");
1.1 deraadt 20:
21: #include "ssh.h"
22: #include "rsa.h"
23: #include "authfd.h"
24: #include "buffer.h"
25: #include "bufaux.h"
26: #include "xmalloc.h"
27: #include "packet.h"
28: #include "getput.h"
29: #include "mpaux.h"
30:
1.13 deraadt 31: #include <ssl/md5.h>
1.7 deraadt 32:
1.1 deraadt 33: typedef struct
34: {
35: int fd;
1.12 markus 36: enum { AUTH_UNUSED, AUTH_SOCKET, AUTH_CONNECTION } type;
1.1 deraadt 37: Buffer input;
38: Buffer output;
39: } SocketEntry;
40:
41: unsigned int sockets_alloc = 0;
42: SocketEntry *sockets = NULL;
43:
44: typedef struct
45: {
1.2 provos 46: RSA *key;
1.1 deraadt 47: char *comment;
48: } Identity;
49:
50: unsigned int num_identities = 0;
51: Identity *identities = NULL;
52:
53: int max_fd = 0;
54:
1.11 markus 55: /* pid of shell == parent of agent */
1.10 markus 56: int parent_pid = -1;
57:
58: /* pathname and directory for AUTH_SOCKET */
59: char socket_name[1024];
60: char socket_dir[1024];
61:
1.2 provos 62: void
63: process_request_identity(SocketEntry *e)
1.1 deraadt 64: {
65: Buffer msg;
66: int i;
67:
68: buffer_init(&msg);
69: buffer_put_char(&msg, SSH_AGENT_RSA_IDENTITIES_ANSWER);
70: buffer_put_int(&msg, num_identities);
71: for (i = 0; i < num_identities; i++)
72: {
1.2 provos 73: buffer_put_int(&msg, BN_num_bits(identities[i].key->n));
74: buffer_put_bignum(&msg, identities[i].key->e);
75: buffer_put_bignum(&msg, identities[i].key->n);
1.1 deraadt 76: buffer_put_string(&msg, identities[i].comment,
77: strlen(identities[i].comment));
78: }
79: buffer_put_int(&e->output, buffer_len(&msg));
80: buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg));
81: buffer_free(&msg);
82: }
83:
1.2 provos 84: void
85: process_authentication_challenge(SocketEntry *e)
1.1 deraadt 86: {
1.2 provos 87: int i, pub_bits, len;
88: BIGNUM *pub_e, *pub_n, *challenge;
1.1 deraadt 89: Buffer msg;
1.7 deraadt 90: MD5_CTX md;
1.1 deraadt 91: unsigned char buf[32], mdbuf[16], session_id[16];
92: unsigned int response_type;
93:
94: buffer_init(&msg);
1.2 provos 95: pub_e = BN_new();
96: pub_n = BN_new();
97: challenge = BN_new();
1.1 deraadt 98: pub_bits = buffer_get_int(&e->input);
1.2 provos 99: buffer_get_bignum(&e->input, pub_e);
100: buffer_get_bignum(&e->input, pub_n);
101: buffer_get_bignum(&e->input, challenge);
1.1 deraadt 102: if (buffer_len(&e->input) == 0)
103: {
104: /* Compatibility code for old servers. */
105: memset(session_id, 0, 16);
106: response_type = 0;
107: }
108: else
109: {
110: /* New code. */
111: buffer_get(&e->input, (char *)session_id, 16);
112: response_type = buffer_get_int(&e->input);
113: }
114: for (i = 0; i < num_identities; i++)
1.2 provos 115: if (pub_bits == BN_num_bits(identities[i].key->n) &&
116: BN_cmp(pub_e, identities[i].key->e) == 0 &&
117: BN_cmp(pub_n, identities[i].key->n) == 0)
1.1 deraadt 118: {
119: /* Decrypt the challenge using the private key. */
1.2 provos 120: rsa_private_decrypt(challenge, challenge, identities[i].key);
1.1 deraadt 121:
122: /* Compute the desired response. */
123: switch (response_type)
124: {
125: case 0: /* As of protocol 1.0 */
126: /* This response type is no longer supported. */
127: log("Compatibility with ssh protocol 1.0 no longer supported.");
128: buffer_put_char(&msg, SSH_AGENT_FAILURE);
129: goto send;
130:
131: case 1: /* As of protocol 1.1 */
132: /* The response is MD5 of decrypted challenge plus session id. */
1.2 provos 133: len = BN_num_bytes(challenge);
1.17 ! markus 134:
! 135: if (len <= 0 || len > 32) {
! 136: fatal("process_authentication_challenge: "
! 137: "bad challenge length %d", len);
! 138: }
! 139:
1.2 provos 140: memset(buf, 0, 32);
141: BN_bn2bin(challenge, buf + 32 - len);
1.13 deraadt 142: MD5_Init(&md);
143: MD5_Update(&md, buf, 32);
144: MD5_Update(&md, session_id, 16);
145: MD5_Final(mdbuf, &md);
1.1 deraadt 146: break;
147:
148: default:
149: fatal("process_authentication_challenge: bad response_type %d",
150: response_type);
151: break;
152: }
153:
154: /* Send the response. */
155: buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE);
156: for (i = 0; i < 16; i++)
157: buffer_put_char(&msg, mdbuf[i]);
158:
159: goto send;
160: }
161: /* Unknown identity. Send failure. */
162: buffer_put_char(&msg, SSH_AGENT_FAILURE);
163: send:
164: buffer_put_int(&e->output, buffer_len(&msg));
165: buffer_append(&e->output, buffer_ptr(&msg),
166: buffer_len(&msg));
167: buffer_free(&msg);
1.2 provos 168: BN_clear_free(pub_e);
169: BN_clear_free(pub_n);
170: BN_clear_free(challenge);
1.1 deraadt 171: }
172:
1.2 provos 173: void
174: process_remove_identity(SocketEntry *e)
1.1 deraadt 175: {
176: unsigned int bits;
177: unsigned int i;
1.2 provos 178: BIGNUM *dummy, *n;
1.1 deraadt 179:
1.2 provos 180: dummy = BN_new();
181: n = BN_new();
1.1 deraadt 182:
183: /* Get the key from the packet. */
184: bits = buffer_get_int(&e->input);
1.2 provos 185: buffer_get_bignum(&e->input, dummy);
186: buffer_get_bignum(&e->input, n);
1.1 deraadt 187:
188: /* Check if we have the key. */
189: for (i = 0; i < num_identities; i++)
1.2 provos 190: if (BN_cmp(identities[i].key->n, n) == 0)
1.1 deraadt 191: {
192: /* We have this key. Free the old key. Since we don\'t want to leave
193: empty slots in the middle of the array, we actually free the
194: key there and copy data from the last entry. */
1.2 provos 195: RSA_free(identities[i].key);
1.1 deraadt 196: xfree(identities[i].comment);
197: if (i < num_identities - 1)
198: identities[i] = identities[num_identities - 1];
199: num_identities--;
1.2 provos 200: BN_clear_free(dummy);
201: BN_clear_free(n);
1.1 deraadt 202:
203: /* Send success. */
204: buffer_put_int(&e->output, 1);
205: buffer_put_char(&e->output, SSH_AGENT_SUCCESS);
206: return;
207: }
208: /* We did not have the key. */
1.2 provos 209: BN_clear(dummy);
210: BN_clear(n);
1.1 deraadt 211:
212: /* Send failure. */
213: buffer_put_int(&e->output, 1);
214: buffer_put_char(&e->output, SSH_AGENT_FAILURE);
215: }
216:
217: /* Removes all identities from the agent. */
218:
1.2 provos 219: void
220: process_remove_all_identities(SocketEntry *e)
1.1 deraadt 221: {
222: unsigned int i;
223:
224: /* Loop over all identities and clear the keys. */
225: for (i = 0; i < num_identities; i++)
226: {
1.2 provos 227: RSA_free(identities[i].key);
1.1 deraadt 228: xfree(identities[i].comment);
229: }
230:
231: /* Mark that there are no identities. */
232: num_identities = 0;
233:
234: /* Send success. */
235: buffer_put_int(&e->output, 1);
236: buffer_put_char(&e->output, SSH_AGENT_SUCCESS);
237: return;
238: }
239:
240: /* Adds an identity to the agent. */
241:
1.2 provos 242: void
243: process_add_identity(SocketEntry *e)
1.1 deraadt 244: {
1.2 provos 245: RSA *k;
1.1 deraadt 246: int i;
1.2 provos 247: BIGNUM *aux;
248: BN_CTX *ctx;
249:
1.1 deraadt 250: if (num_identities == 0)
251: identities = xmalloc(sizeof(Identity));
252: else
253: identities = xrealloc(identities, (num_identities + 1) * sizeof(Identity));
1.2 provos 254:
255: identities[num_identities].key = RSA_new();
256: k = identities[num_identities].key;
257: buffer_get_int(&e->input); /* bits */
258: k->n = BN_new();
259: buffer_get_bignum(&e->input, k->n);
260: k->e = BN_new();
261: buffer_get_bignum(&e->input, k->e);
262: k->d = BN_new();
263: buffer_get_bignum(&e->input, k->d);
264: k->iqmp = BN_new();
265: buffer_get_bignum(&e->input, k->iqmp);
266: /* SSH and SSL have p and q swapped */
267: k->q = BN_new();
268: buffer_get_bignum(&e->input, k->q); /* p */
269: k->p = BN_new();
270: buffer_get_bignum(&e->input, k->p); /* q */
271:
272: /* Generate additional parameters */
273: aux = BN_new();
274: ctx = BN_CTX_new();
275:
276: BN_sub(aux, k->q, BN_value_one());
277: k->dmq1 = BN_new();
278: BN_mod(k->dmq1, k->d, aux, ctx);
279:
280: BN_sub(aux, k->p, BN_value_one());
281: k->dmp1 = BN_new();
282: BN_mod(k->dmp1, k->d, aux, ctx);
283:
284: BN_clear_free(aux);
285: BN_CTX_free(ctx);
286:
1.1 deraadt 287: identities[num_identities].comment = buffer_get_string(&e->input, NULL);
288:
289: /* Check if we already have the key. */
290: for (i = 0; i < num_identities; i++)
1.2 provos 291: if (BN_cmp(identities[i].key->n, k->n) == 0)
1.1 deraadt 292: {
293: /* We already have this key. Clear and free the new data and
294: return success. */
1.2 provos 295: RSA_free(k);
1.1 deraadt 296: xfree(identities[num_identities].comment);
297:
298: /* Send success. */
299: buffer_put_int(&e->output, 1);
300: buffer_put_char(&e->output, SSH_AGENT_SUCCESS);
301: return;
302: }
303:
304: /* Increment the number of identities. */
305: num_identities++;
306:
307: /* Send a success message. */
308: buffer_put_int(&e->output, 1);
309: buffer_put_char(&e->output, SSH_AGENT_SUCCESS);
310: }
311:
1.2 provos 312: void
313: process_message(SocketEntry *e)
1.1 deraadt 314: {
315: unsigned int msg_len;
316: unsigned int type;
317: unsigned char *cp;
318: if (buffer_len(&e->input) < 5)
319: return; /* Incomplete message. */
320: cp = (unsigned char *)buffer_ptr(&e->input);
321: msg_len = GET_32BIT(cp);
322: if (msg_len > 256 * 1024)
323: {
1.8 deraadt 324: shutdown(e->fd, SHUT_RDWR);
1.1 deraadt 325: close(e->fd);
326: e->type = AUTH_UNUSED;
327: return;
328: }
329: if (buffer_len(&e->input) < msg_len + 4)
330: return;
331: buffer_consume(&e->input, 4);
332: type = buffer_get_char(&e->input);
1.12 markus 333:
1.1 deraadt 334: switch (type)
335: {
336: case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
337: process_request_identity(e);
338: break;
339: case SSH_AGENTC_RSA_CHALLENGE:
340: process_authentication_challenge(e);
341: break;
342: case SSH_AGENTC_ADD_RSA_IDENTITY:
343: process_add_identity(e);
344: break;
345: case SSH_AGENTC_REMOVE_RSA_IDENTITY:
346: process_remove_identity(e);
347: break;
348: case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES:
349: process_remove_all_identities(e);
350: break;
351: default:
352: /* Unknown message. Respond with failure. */
353: error("Unknown message %d", type);
354: buffer_clear(&e->input);
355: buffer_put_int(&e->output, 1);
356: buffer_put_char(&e->output, SSH_AGENT_FAILURE);
357: break;
358: }
359: }
360:
1.2 provos 361: void
362: new_socket(int type, int fd)
1.1 deraadt 363: {
364: unsigned int i, old_alloc;
365: if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
366: error("fcntl O_NONBLOCK: %s", strerror(errno));
367:
368: if (fd > max_fd)
369: max_fd = fd;
370:
371: for (i = 0; i < sockets_alloc; i++)
372: if (sockets[i].type == AUTH_UNUSED)
373: {
374: sockets[i].fd = fd;
375: sockets[i].type = type;
376: buffer_init(&sockets[i].input);
377: buffer_init(&sockets[i].output);
378: return;
379: }
380: old_alloc = sockets_alloc;
381: sockets_alloc += 10;
382: if (sockets)
383: sockets = xrealloc(sockets, sockets_alloc * sizeof(sockets[0]));
384: else
385: sockets = xmalloc(sockets_alloc * sizeof(sockets[0]));
386: for (i = old_alloc; i < sockets_alloc; i++)
387: sockets[i].type = AUTH_UNUSED;
388: sockets[old_alloc].type = type;
389: sockets[old_alloc].fd = fd;
390: buffer_init(&sockets[old_alloc].input);
391: buffer_init(&sockets[old_alloc].output);
392: }
393:
1.2 provos 394: void
395: prepare_select(fd_set *readset, fd_set *writeset)
1.1 deraadt 396: {
397: unsigned int i;
398: for (i = 0; i < sockets_alloc; i++)
399: switch (sockets[i].type)
400: {
1.12 markus 401: case AUTH_SOCKET:
1.1 deraadt 402: case AUTH_CONNECTION:
403: FD_SET(sockets[i].fd, readset);
404: if (buffer_len(&sockets[i].output) > 0)
405: FD_SET(sockets[i].fd, writeset);
406: break;
407: case AUTH_UNUSED:
408: break;
409: default:
410: fatal("Unknown socket type %d", sockets[i].type);
411: break;
412: }
413: }
414:
415: void after_select(fd_set *readset, fd_set *writeset)
416: {
417: unsigned int i;
1.12 markus 418: int len, sock;
1.1 deraadt 419: char buf[1024];
420: struct sockaddr_un sunaddr;
421:
422: for (i = 0; i < sockets_alloc; i++)
423: switch (sockets[i].type)
424: {
425: case AUTH_UNUSED:
426: break;
427: case AUTH_SOCKET:
428: if (FD_ISSET(sockets[i].fd, readset))
429: {
430: len = sizeof(sunaddr);
431: sock = accept(sockets[i].fd, (struct sockaddr *)&sunaddr, &len);
432: if (sock < 0)
433: {
434: perror("accept from AUTH_SOCKET");
435: break;
436: }
1.12 markus 437: new_socket(AUTH_CONNECTION, sock);
1.1 deraadt 438: }
439: break;
440: case AUTH_CONNECTION:
441: if (buffer_len(&sockets[i].output) > 0 &&
442: FD_ISSET(sockets[i].fd, writeset))
443: {
444: len = write(sockets[i].fd, buffer_ptr(&sockets[i].output),
445: buffer_len(&sockets[i].output));
446: if (len <= 0)
447: {
1.8 deraadt 448: shutdown(sockets[i].fd, SHUT_RDWR);
1.1 deraadt 449: close(sockets[i].fd);
450: sockets[i].type = AUTH_UNUSED;
451: break;
452: }
453: buffer_consume(&sockets[i].output, len);
454: }
455: if (FD_ISSET(sockets[i].fd, readset))
456: {
457: len = read(sockets[i].fd, buf, sizeof(buf));
458: if (len <= 0)
459: {
1.8 deraadt 460: shutdown(sockets[i].fd, SHUT_RDWR);
1.1 deraadt 461: close(sockets[i].fd);
462: sockets[i].type = AUTH_UNUSED;
463: break;
464: }
465: buffer_append(&sockets[i].input, buf, len);
466: process_message(&sockets[i]);
467: }
468: break;
469: default:
470: fatal("Unknown type %d", sockets[i].type);
471: }
472: }
473:
1.6 deraadt 474: void
1.2 provos 475: check_parent_exists(int sig)
1.1 deraadt 476: {
477: if (kill(parent_pid, 0) < 0)
478: {
479: /* printf("Parent has died - Authentication agent exiting.\n"); */
480: exit(1);
481: }
482: signal(SIGALRM, check_parent_exists);
483: alarm(10);
484: }
485:
1.15 markus 486: void
487: cleanup_socket(void)
488: {
1.10 markus 489: remove(socket_name);
490: rmdir(socket_dir);
491: }
492:
1.15 markus 493: void
494: cleanup_exit(int i)
495: {
496: cleanup_socket();
497: exit(i);
498: }
499:
500: void
501: usage()
502: {
503: extern char *__progname;
504:
505: fprintf(stderr, "ssh-agent version %s\n", SSH_VERSION);
506: fprintf(stderr, "Usage: %s [-c | -s] [-k] [command {args...]]\n",
507: __progname);
508: exit(1);
509: }
510:
1.2 provos 511: int
512: main(int ac, char **av)
1.1 deraadt 513: {
514: fd_set readset, writeset;
1.15 markus 515: int sock, c_flag = 0, k_flag = 0, s_flag = 0, ch;
1.1 deraadt 516: struct sockaddr_un sunaddr;
1.15 markus 517: pid_t pid;
518: char *shell, *format, *pidstr, pidstrbuf[1 + 3 * sizeof pid];
1.1 deraadt 519:
1.3 deraadt 520: /* check if RSA support exists */
521: if (rsa_alive() == 0) {
522: extern char *__progname;
523: fprintf(stderr,
524: "%s: no RSA support in libssl and libcrypto. See ssl(8).\n",
525: __progname);
526: exit(1);
527: }
1.1 deraadt 528:
1.15 markus 529: while ((ch = getopt(ac, av, "cks")) != -1)
530: {
531: switch (ch)
532: {
533: case 'c':
534: if (s_flag)
535: usage();
536: c_flag++;
537: break;
538: case 'k':
539: k_flag++;
540: break;
541: case 's':
542: if (c_flag)
543: usage();
544: s_flag++;
545: break;
546: default:
547: usage();
548: }
549: }
550: ac -= optind;
551: av += optind;
552:
553: if (ac > 0 && (c_flag || k_flag || s_flag))
554: usage();
555:
556: if (ac == 0 && !c_flag && !k_flag && !s_flag)
557: {
558: shell = getenv("SHELL");
559: if (shell != NULL && strncmp(shell + strlen(shell) - 3, "csh", 3) == 0)
560: c_flag = 1;
561: }
562:
563: if (k_flag)
1.1 deraadt 564: {
1.15 markus 565: pidstr = getenv(SSH_AGENTPID_ENV_NAME);
566: if (pidstr == NULL)
567: {
568: fprintf(stderr, "%s not set, cannot kill agent\n",
569: SSH_AGENTPID_ENV_NAME);
570: exit(1);
571: }
572: pid = atoi(pidstr);
573: if (pid < 1) /* XXX PID_MAX check too */
574: {
575: fprintf(stderr, "%s=\"%s\", which is not a good PID\n",
576: SSH_AGENTPID_ENV_NAME, pidstr);
577: exit(1);
578: }
579: if (kill(pid, SIGTERM) == -1)
580: {
581: perror("kill");
582: exit(1);
583: }
584: format = c_flag ? "unsetenv %s;\n" : "unset %s;\n";
585: printf(format, SSH_AUTHSOCKET_ENV_NAME);
586: printf(format, SSH_AGENTPID_ENV_NAME);
587: printf("echo Agent pid %d killed;\n", pid);
588: exit(0);
1.1 deraadt 589: }
590:
1.9 markus 591: parent_pid = getpid();
1.10 markus 592:
593: /* Create private directory for agent socket */
594: strlcpy(socket_dir, "/tmp/ssh-XXXXXXXX", sizeof socket_dir);
595: if (mkdtemp(socket_dir) == NULL) {
596: perror("mkdtemp: private socket dir");
597: exit(1);
598: }
1.15 markus 599: snprintf(socket_name, sizeof socket_name, "%s/agent.%d", socket_dir,
600: parent_pid);
1.10 markus 601:
1.15 markus 602: /* Create socket early so it will exist before command gets run from
603: the parent. */
1.9 markus 604: sock = socket(AF_UNIX, SOCK_STREAM, 0);
605: if (sock < 0)
1.1 deraadt 606: {
1.9 markus 607: perror("socket");
1.15 markus 608: cleanup_exit(1);
1.9 markus 609: }
610: memset(&sunaddr, 0, sizeof(sunaddr));
611: sunaddr.sun_family = AF_UNIX;
612: strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path));
613: if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0)
614: {
615: perror("bind");
1.15 markus 616: cleanup_exit(1);
1.9 markus 617: }
618: if (listen(sock, 5) < 0)
619: {
620: perror("listen");
1.15 markus 621: cleanup_exit(1);
622: }
623:
624: /* Fork, and have the parent execute the command, if any, or present the
625: socket data. The child continues as the authentication agent. */
626: pid = fork();
627: if (pid == -1)
628: {
629: perror("fork");
630: exit(1);
631: }
632: if (pid != 0)
633: { /* Parent - execute the given command. */
634: close(sock);
635: snprintf(pidstrbuf, sizeof pidstrbuf, "%d", pid);
636: if (ac == 0)
637: {
638: format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n";
639: printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name,
640: SSH_AUTHSOCKET_ENV_NAME);
641: printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf,
642: SSH_AGENTPID_ENV_NAME);
643: printf("echo Agent pid %d;\n", pid);
644: exit(0);
645: }
646:
647: setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1);
648: setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1);
649: execvp(av[0], av);
650: perror(av[0]);
1.9 markus 651: exit(1);
1.1 deraadt 652: }
1.15 markus 653:
654: close(0);
655: close(1);
656: close(2);
657:
1.16 markus 658: if (setsid() == -1)
659: {
660: perror("setsid");
661: cleanup_exit(1);
662: }
1.15 markus 663:
664: if (atexit(cleanup_socket) < 0)
1.16 markus 665: {
666: perror("atexit");
667: cleanup_exit(1);
668: }
1.15 markus 669:
1.9 markus 670: new_socket(AUTH_SOCKET, sock);
1.15 markus 671: if (ac > 0)
672: {
673: signal(SIGALRM, check_parent_exists);
674: alarm(10);
675: }
1.1 deraadt 676:
677: signal(SIGINT, SIG_IGN);
1.15 markus 678: signal(SIGPIPE, SIG_IGN);
1.1 deraadt 679: while (1)
680: {
681: FD_ZERO(&readset);
682: FD_ZERO(&writeset);
683: prepare_select(&readset, &writeset);
684: if (select(max_fd + 1, &readset, &writeset, NULL, NULL) < 0)
685: {
686: if (errno == EINTR)
687: continue;
688: exit(1);
689: }
690: after_select(&readset, &writeset);
691: }
692: /*NOTREACHED*/
693: }
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