2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include <afs/param.h>
14 #include <sys/types.h>
27 #include <afs/com_err.h>
29 #include <afs/afsutil.h>
30 #include <afs/cellconfig.h>
32 #include "rxk5_utilafs.h"
34 #include <afs/ptclient.h>
38 #ifdef HAVE_KRB5_CREDS_KEYBLOCK
41 #ifdef HAVE_KRB5_CREDS_SESSION
42 #define USING_HEIMDAL 1
48 /* This code borrowed heavily from the previous version of log. Here is the
49 intro comment for that program: */
52 log -- tell the Andrew Cache Manager your password
57 Further modified in August 1987 to understand cell IDs.
59 Further modified in October 2006 to understand kerberos 5.
63 klog [principal [password]] [-t] [-c cellname] [-k <k5realm>]
66 principal is of the form 'name' or 'name@cell' which provides the
67 cellname. See the -c option below.
68 password is the user's password. This form is NOT recommended for
70 -t advises klog to write a Kerberos style ticket file in /tmp.
71 -c identifies cellname as the cell in which authentication is to take
73 -k identifies an alternate kerberos realm to use provide
74 authentication services for the cell.
77 #define KLOGEXIT(code) rx_Finalize(); \
79 static int CommandProc(struct cmd_syndesc *as, void *arock);
82 static char **zero_argv;
84 static krb5_context k5context;
85 static struct afsconf_dir *tdir;
86 static int always_evil = 2; /* gcc optimizes 0 into bss. fools. */
89 main(int argc, char *argv[])
91 struct cmd_syndesc *ts;
95 * The following signal action for AIX is necessary so that in case of a
96 * crash (i.e. core is generated) we can include the user's data section
97 * in the core dump. Unfortunately, by default, only a partial core is
98 * generated which, in many cases, isn't too useful.
100 struct sigaction nsa;
102 sigemptyset(&nsa.sa_mask);
103 nsa.sa_handler = SIG_DFL;
104 nsa.sa_flags = SA_FULLDUMP;
105 sigaction(SIGABRT, &nsa, NULL);
106 sigaction(SIGSEGV, &nsa, NULL);
111 ts = cmd_CreateSyntax(NULL, CommandProc, NULL,
112 "obtain Kerberos authentication");
129 cmd_AddParm(ts, "-x", CMD_FLAG, CMD_OPTIONAL|CMD_HIDDEN, 0);
130 cmd_Seek(ts, aPRINCIPAL);
131 cmd_AddParm(ts, "-principal", CMD_SINGLE, CMD_OPTIONAL, "user name");
132 cmd_AddParm(ts, "-password", CMD_SINGLE, CMD_OPTIONAL, "user's password");
133 cmd_AddParm(ts, "-cell", CMD_SINGLE, CMD_OPTIONAL, "cell name");
134 cmd_AddParm(ts, "-k", CMD_SINGLE, CMD_OPTIONAL, "krb5 realm");
135 cmd_AddParm(ts, "-pipe", CMD_FLAG, CMD_OPTIONAL,
136 "read password from stdin");
137 cmd_AddParm(ts, "-silent", CMD_FLAG, CMD_OPTIONAL, "silent operation");
138 cmd_AddParm(ts, "-lifetime", CMD_SINGLE, CMD_OPTIONAL,
139 "ticket lifetime in hh[:mm[:ss]]");
140 cmd_AddParm(ts, "-setpag", CMD_FLAG, CMD_OPTIONAL,
141 "Create a new setpag before authenticating");
142 cmd_AddParm(ts, "-tmp", CMD_FLAG, CMD_OPTIONAL,
143 "write Kerberos-style ticket file in /tmp");
144 cmd_AddParm(ts, "-noprdb", CMD_FLAG, CMD_OPTIONAL, "don't consult pt");
145 cmd_AddParm(ts, "-unwrap", CMD_FLAG, CMD_OPTIONAL, "perform 524d conversion");
147 cmd_AddParm(ts, "-k5", CMD_FLAG, CMD_OPTIONAL, "get rxk5 credentials");
148 cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL, "get rxkad credentials");
150 ++ts->nParms; /* skip -k5 */
151 cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL|CMD_HIDDEN, 0);
154 code = cmd_Dispatch(argc, argv);
161 static char gpbuf[BUFSIZ];
162 /* read a password from stdin, stop on \n or eof */
164 memset(gpbuf, 0, sizeof(gpbuf));
165 for (i = 0; i < (sizeof(gpbuf) - 1); i++) {
167 if (tc == '\n' || tc == EOF)
175 silent_errors(const char *who,
180 /* ignore and don't print error */
183 #if defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
185 #define get_princ_str(c, p, n) krb5_princ_component(c, p, n)->data
186 #define get_princ_len(c, p, n) krb5_princ_component(c, p, n)->length
187 #define num_comp(c, p) (krb5_princ_size(c, p))
188 #define realm_data(c, p) krb5_princ_realm(c, p)->data
189 #define realm_len(c, p) krb5_princ_realm(c, p)->length
191 #elif defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
193 #define get_princ_str(c, p, n) krb5_principal_get_comp_string(c, p, n)
194 #define get_princ_len(c, p, n) strlen(krb5_principal_get_comp_string(c, p, n))
195 #define num_comp(c, p) ((p)->name.name_string.len)
196 #define realm_data(c, p) krb5_realm_data(krb5_principal_get_realm(c, p))
197 #define realm_len(c, p) krb5_realm_length(krb5_principal_get_realm(c, p))
200 #error "Must have either krb5_princ_size or krb5_principal_get_comp_string"
203 #if defined(HAVE_KRB5_CREDS_KEYBLOCK)
205 #define get_cred_keydata(c) c->keyblock.contents
206 #define get_cred_keylen(c) c->keyblock.length
207 #define get_creds_enctype(c) c->keyblock.enctype
209 #elif defined(HAVE_KRB5_CREDS_SESSION)
211 #define get_cred_keydata(c) c->session.keyvalue.data
212 #define get_cred_keylen(c) c->session.keyvalue.length
213 #define get_creds_enctype(c) c->session.keytype
216 #error "Must have either keyblock or session member of krb5_creds"
220 whoami(struct ktc_token *atoken,
221 struct afsconf_cell *cellconfig,
222 struct ktc_principal *aclient,
225 rx_securityIndex scIndex;
228 struct ubik_client *ptconn = 0;
229 struct rx_securityClass *sc;
230 struct rx_connection *conns[MAXSERVERS+1];
233 char tempname[PR_MAXNAMELEN + 1];
235 memset(lnames, 0, sizeof *lnames);
236 memset(lids, 0, sizeof *lids);
237 scIndex = RX_SECIDX_KAD;
238 sc = rxkad_NewClientSecurityObject(rxkad_auth,
239 &atoken->sessionKey, atoken->kvno,
240 atoken->ticketLen, atoken->ticket);
241 for (i = 0; i < cellconfig->numServers; ++i)
242 conns[i] = rx_NewConnection(cellconfig->hostAddr[i].sin_addr.s_addr,
243 cellconfig->hostAddr[i].sin_port, PRSRV, sc, scIndex);
246 if ((code = ubik_ClientInit(conns, &ptconn)))
248 if (*aclient->instance)
249 snprintf (tempname, sizeof tempname, "%s.%s",
250 aclient->name, aclient->instance);
252 snprintf (tempname, sizeof tempname, "%s", aclient->name);
253 lnames->namelist_len = 1;
254 lnames->namelist_val = (prname *) tempname;
255 code = ubik_PR_NameToID(ptconn, 0, lnames, lids);
256 if (lids->idlist_val) {
257 *vicep = *lids->idlist_val;
260 if (lids->idlist_val) free(lids->idlist_val);
261 if (ptconn) ubik_ClientDestroy(ptconn);
266 k5_to_k4_name(krb5_context k5context,
267 krb5_principal k5princ,
268 struct ktc_principal *ktcprinc)
272 switch(num_comp(k5context, k5princ)) {
275 i = get_princ_len(k5context, k5princ, 1);
276 if (i > MAXKTCNAMELEN-1) i = MAXKTCNAMELEN-1;
277 memcpy(ktcprinc->instance, get_princ_str(k5context, k5princ, 1), i);
280 i = get_princ_len(k5context, k5princ, 0);
281 if (i > MAXKTCNAMELEN-1) i = MAXKTCNAMELEN-1;
282 memcpy(ktcprinc->name, get_princ_str(k5context, k5princ, 0), i);
289 #if defined(USING_HEIMDAL) || defined(HAVE_KRB5_PROMPT_TYPE)
291 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
293 switch (prompts[index].type) {
294 case KRB5_PROMPT_TYPE_PASSWORD:
295 case KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN:
301 #elif defined(HAVE_KRB5_GET_PROMPT_TYPES)
303 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
305 /* this isn't thread-safe or anything obviously; it just should be good
306 * enough to work with klog */
307 static krb5_prompt_type *types = NULL;
312 types = krb5_get_prompt_types(context);
317 switch (types[index]) {
318 case KRB5_PROMPT_TYPE_PASSWORD:
319 case KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN:
327 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
329 /* AIX 5.3 doesn't have krb5_get_prompt_types. Neither does HP-UX, which
330 * also doesn't even define KRB5_PROMPT_TYPE_PASSWORD &co. We have no way
331 * of determining the the prompt type, so just assume it's a password */
336 /* save and reuse password. This is necessary to make
337 * "direct to service" authentication work with most
338 * flavors of kerberos, when the afs principal has no instance.
345 klog_prompter(krb5_context context,
350 krb5_prompt prompts[])
352 krb5_error_code code;
354 struct kp_arg *kparg = (struct kp_arg *) a;
357 code = krb5_prompter_posix(context, a, name, banner, num_prompts, prompts);
358 if (code) return code;
359 for (i = 0; i < num_prompts; ++i) {
360 if (klog_is_pass_prompt(i, context, prompts)) {
361 length = prompts[i].reply->length;
362 if (length > kparg->allocated - 1)
363 length = kparg->allocated - 1;
364 memcpy(kparg->pstore, prompts[i].reply->data, length);
365 kparg->pstore[length] = 0;
366 *kparg->pp = kparg->pstore;
373 CommandProc(struct cmd_syndesc *as, void *arock)
375 krb5_principal princ = 0;
376 char *cell, *pname, **hrealms, *service;
377 char service_temp[MAXKTCREALMLEN + 20];
378 krb5_creds incred[1], mcred[1], *outcred = 0, *afscred;
380 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
381 krb5_get_init_creds_opt *gic_opts;
383 krb5_get_init_creds_opt gic_opts[1];
385 char *tofree = NULL, *outname;
388 int i, dosetpag, evil, noprdb, id;
392 krb5_data enc_part[1];
393 time_t lifetime; /* requested ticket lifetime */
394 krb5_prompter_fct pf = NULL;
397 struct kp_arg klog_arg[1];
400 struct afsconf_cell cellconfig[1];
402 static char rn[] = "klog"; /*Routine name */
403 static int Pipe = 0; /* reading from a pipe */
404 static int Silent = 0; /* Don't want error messages */
406 int writeTicketFile = 0; /* write ticket file to /tmp */
409 memset(incred, 0, sizeof *incred);
410 /* blow away command line arguments */
411 for (i = 1; i < zero_argc; i++)
412 memset(zero_argv[i], 0, strlen(zero_argv[i]));
414 memset(klog_arg, 0, sizeof *klog_arg);
416 /* first determine quiet flag based on -silent switch */
417 Silent = (as->parms[aSILENT].items ? 1 : 0);
420 afs_set_com_err_hook(silent_errors);
423 if ((code = krb5_init_context(&k5context))) {
424 afs_com_err(rn, code, "while initializing Kerberos 5 library");
427 if ((code = rx_Init(0))) {
428 afs_com_err(rn, code, "while initializing rx");
431 initialize_U_error_table();
432 /*initialize_krb5_error_table();*/
433 initialize_RXK_error_table();
434 initialize_KTC_error_table();
435 initialize_ACFG_error_table();
436 /* initialize_rx_error_table(); */
437 if (!(tdir = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH))) {
438 afs_com_err(rn, 0, "can't get afs configuration (afsconf_Open(%s))",
439 AFSDIR_CLIENT_ETC_DIRPATH);
444 * Enable DES enctypes, which are currently still required for AFS.
445 * krb5_allow_weak_crypto is MIT Kerberos 1.8. krb5_enctype_enable is
448 #if defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)
449 krb5_allow_weak_crypto(k5context, 1);
450 #elif defined(HAVE_KRB5_ENCTYPE_ENABLE)
451 i = krb5_enctype_valid(k5context, ETYPE_DES_CBC_CRC);
453 krb5_enctype_enable(k5context, ETYPE_DES_CBC_CRC);
456 /* Parse remaining arguments. */
458 dosetpag = !! as->parms[aSETPAG].items;
459 Pipe = !! as->parms[aPIPE].items;
460 writeTicketFile = !! as->parms[aTMP].items;
461 noprdb = !! as->parms[aNOPRDB].items;
462 evil = (always_evil&1) || !! as->parms[aUNWRAP].items;
466 if (as->parms[aK5].items)
467 authtype |= FORCE_RXK5;
468 if (as->parms[aK4].items)
469 authtype |= FORCE_RXKAD;
471 authtype |= env_afs_rxk5_default();
474 cell = as->parms[aCELL].items ? as->parms[aCELL].items->data : 0;
475 if ((code = afsconf_GetCellInfo(tdir, cell, "afsprot", cellconfig))) {
477 afs_com_err(rn, code, "Can't get cell information for '%s'", cell);
479 afs_com_err(rn, code, "Can't get determine local cell!");
483 if (as->parms[aKRBREALM].items) {
484 code = krb5_set_default_realm(k5context,
485 as->parms[aKRBREALM].items->data);
487 afs_com_err(rn, code, "Can't make <%s> the default realm",
488 as->parms[aKRBREALM].items->data);
492 else if ((code = krb5_get_host_realm(k5context, cellconfig->hostName[0], &hrealms))) {
493 afs_com_err(rn, code, "Can't get realm for host <%s> in cell <%s>\n",
494 cellconfig->hostName[0], cellconfig->name);
497 if (hrealms && *hrealms) {
498 code = krb5_set_default_realm(k5context,
501 afs_com_err(rn, code, "Can't make <%s> the default realm",
506 if (hrealms) krb5_free_host_realm(k5context, hrealms);
510 if (as->parms[aPRINCIPAL].items) {
511 pname = as->parms[aPRINCIPAL].items->data;
513 /* No explicit name provided: use Unix uid. */
518 "Can't figure out your name from your user id (%d).", id);
520 fprintf(stderr, "%s: Try providing the user name.\n", rn);
525 code = krb5_parse_name(k5context, pname, &princ);
527 afs_com_err(rn, code, "Can't parse principal <%s>", pname);
531 if (as->parms[aPASSWORD].items) {
533 * Current argument is the desired password string. Remember it in
534 * our local buffer, and zero out the argument string - anyone can
535 * see it there with ps!
537 strncpy(passwd, as->parms[aPASSWORD].items->data, sizeof(passwd));
538 memset(as->parms[aPASSWORD].items->data, 0,
539 strlen(as->parms[aPASSWORD].items->data));
543 if (as->parms[aLIFETIME].items) {
544 char *life = as->parms[aLIFETIME].items->data;
545 char *sp; /* string ptr to rest of life */
546 lifetime = 3600 * strtol(life, &sp, 0); /* hours */
550 fprintf(stderr, "%s: translating '%s' to lifetime failed\n",
555 life = sp + 1; /* skip the colon */
556 lifetime += 60 * strtol(life, &sp, 0); /* minutes */
561 lifetime += strtol(life, &sp, 0); /* seconds */
573 /* Get the password if it wasn't provided. */
576 strncpy(passwd, getpipepass(), sizeof(passwd));
586 if (authtype & FORCE_RXK5) {
587 tofree = get_afs_krb5_svc_princ(cellconfig);
588 snprintf(service_temp, sizeof service_temp, "%s", tofree);
591 snprintf (service_temp, sizeof service_temp, "afs/%s", cellconfig->name);
595 service = service_temp;
597 klog_arg->pp = &pass;
598 klog_arg->pstore = passwd;
599 klog_arg->allocated = sizeof(passwd);
600 /* XXX should allow k5 to prompt in most cases -- what about expired pw?*/
601 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
602 code = krb5_get_init_creds_opt_alloc(k5context, &gic_opts);
604 afs_com_err(rn, code, "Can't allocate get_init_creds options");
608 krb5_get_init_creds_opt_init(gic_opts);
611 code = krb5_get_init_creds_password(k5context,
618 service, /* in_tkt_service */
620 if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || service != service_temp) break;
622 if (authtype & FORCE_RXK5) break;
626 memset(passwd, 0, sizeof(passwd));
629 if (krb5_get_default_realm(k5context, &r))
632 afs_com_err(rn, code, "Unable to authenticate to use %s", service);
634 afs_com_err(rn, code, "Unable to authenticate in realm %s", r);
636 afs_com_err(rn, code, "Unable to authenticate to use cell %s",
645 for (;;writeTicketFile = 0) {
646 if (writeTicketFile) {
647 what = "getting default ccache";
648 code = krb5_cc_default(k5context, &cc);
650 what = "krb5_cc_resolve";
651 code = krb5_cc_resolve(k5context, "MEMORY:core", &cc);
652 if (code) goto Failed;
654 what = "initializing ccache";
655 code = krb5_cc_initialize(k5context, cc, princ);
656 if (code) goto Failed;
657 what = "writing Kerberos ticket file";
658 code = krb5_cc_store_cred(k5context, cc, incred);
659 if (code) goto Failed;
662 "Wrote ticket file to %s\n",
663 krb5_cc_get_name(k5context, cc));
667 afs_com_err(rn, code, "%s", what);
668 if (writeTicketFile) {
670 krb5_cc_close(k5context, cc);
678 for (service = service_temp;;service = "afs") {
679 memset(mcred, 0, sizeof *mcred);
680 mcred->client = princ;
681 code = krb5_parse_name(k5context, service, &mcred->server);
683 afs_com_err(rn, code, "Unable to parse service <%s>\n", service);
686 if (tofree) { free(tofree); tofree = 0; }
687 if (!(code = krb5_unparse_name(k5context, mcred->server, &outname)))
689 else outname = service;
690 code = krb5_get_credentials(k5context, 0, cc, mcred, &outcred);
691 krb5_free_principal(k5context, mcred->server);
692 if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || service != service_temp) break;
694 if (authtype & FORCE_RXK5) break;
700 afs_com_err(rn, code, "Unable to get credentials to use %s", outname);
705 if (authtype & FORCE_RXK5) {
706 struct ktc_principal aserver[1];
709 memset(aserver, 0, sizeof *aserver);
710 strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
711 code = ktc_SetK5Token(k5context, aserver, afscred, viceid, dosetpag);
713 afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
720 struct ktc_principal aserver[1], aclient[1];
721 struct ktc_token atoken[1];
723 memset(atoken, 0, sizeof *atoken);
725 size_t elen = enc_part->length;
726 atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5_ENCPART_ONLY;
727 if (afs_krb5_skip_ticket_wrapper(afscred->ticket.data,
728 afscred->ticket.length, (char **) &enc_part->data,
730 afs_com_err(rn, 0, "Can't unwrap %s AFS credential",
735 atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
736 *enc_part = afscred->ticket;
738 atoken->startTime = afscred->times.starttime;
739 atoken->endTime = afscred->times.endtime;
740 memcpy(&atoken->sessionKey, get_cred_keydata(afscred),
741 get_cred_keylen(afscred));
742 memcpy(atoken->ticket, enc_part->data,
743 atoken->ticketLen = enc_part->length);
744 memset(aserver, 0, sizeof *aserver);
745 strncpy(aserver->name, "afs", 4);
746 strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
747 memset(aclient, 0, sizeof *aclient);
748 i = realm_len(k5context, afscred->client);
749 if (i > MAXKTCREALMLEN-1) i = MAXKTCREALMLEN-1;
750 memcpy(aclient->cell, realm_data(k5context, afscred->client), i);
753 k5_to_k4_name(k5context, afscred->client, aclient);
754 code = whoami(atoken, cellconfig, aclient, &viceid);
756 afs_com_err(rn, code, "Can't get your viceid for cell %s", cellconfig->name);
759 snprintf(aclient->name, MAXKTCNAMELEN-1, "AFS ID %d", viceid);
762 k5_to_k4_name(k5context, afscred->client, aclient);
763 code = ktc_SetToken(aserver, atoken, aclient, dosetpag);
765 afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
771 krb5_free_principal(k5context, princ);
772 krb5_free_cred_contents(k5context, incred);
773 if (outcred) krb5_free_creds(k5context, outcred);
775 krb5_cc_close(k5context, cc);
776 if (tofree) free(tofree);