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>
19 #include <afs/com_err.h>
20 #include <afs/cellconfig.h>
28 /* This code borrowed heavily from the previous version of log. Here is the
29 intro comment for that program: */
32 log -- tell the Andrew Cache Manager your password
34 modified February 1986
36 Further modified in August 1987 to understand cell IDs.
40 klog [principal [password]] [-t] [-c cellname] [-servers <hostlist>]
43 principal is of the form 'name' or 'name@cell' which provides the
44 cellname. See the -c option below.
45 password is the user's password. This form is NOT recommended for
47 -t advises klog to write a Kerberos style ticket file in /tmp.
48 -c identifies cellname as the cell in which authentication is to take
50 -servers allows the explicit specification of the hosts providing
51 authentication services for the cell being used for authentication.
54 #define KLOGEXIT(code) assert(!code || code >= KAMINERROR); \
56 (!code ? exit(0) : exit((code)-KAMINERROR+1))
57 static int CommandProc(struct cmd_syndesc *, void *);
60 static char **zero_argv;
72 struct cmd_syndesc *ts;
76 * The following signal action for AIX is necessary so that in case of a
77 * crash (i.e. core is generated) we can include the user's data section
78 * in the core dump. Unfortunately, by default, only a partial core is
79 * generated which, in many cases, isn't too useful.
83 sigemptyset(&nsa.sa_mask);
84 nsa.sa_handler = SIG_DFL;
85 nsa.sa_flags = SA_FULLDUMP;
86 sigaction(SIGSEGV, &nsa, NULL);
91 ts = cmd_CreateSyntax(NULL, CommandProc, NULL, 0,
92 "obtain Kerberos authentication");
106 cmd_AddParm(ts, "-x", CMD_FLAG, CMD_OPTIONAL, "(obsolete, noop)");
107 cmd_Seek(ts, aPRINCIPAL);
108 cmd_AddParm(ts, "-principal", CMD_SINGLE, CMD_OPTIONAL, "user name");
109 cmd_AddParm(ts, "-password", CMD_SINGLE, CMD_OPTIONAL, "user's password");
110 cmd_AddParm(ts, "-tmp", CMD_FLAG, CMD_OPTIONAL,
111 "write Kerberos-style ticket file in /tmp");
112 cmd_AddParm(ts, "-cell", CMD_SINGLE, CMD_OPTIONAL, "cell name");
113 cmd_AddParm(ts, "-servers", CMD_LIST, CMD_OPTIONAL,
114 "explicit list of servers");
115 cmd_AddParm(ts, "-pipe", CMD_FLAG, CMD_OPTIONAL,
116 "read password from stdin");
117 cmd_AddParm(ts, "-silent", CMD_FLAG, CMD_OPTIONAL, "silent operation");
118 cmd_AddParm(ts, "-lifetime", CMD_SINGLE, CMD_OPTIONAL,
119 "ticket lifetime in hh[:mm[:ss]]");
120 cmd_AddParm(ts, "-setpag", CMD_FLAG, CMD_OPTIONAL,
121 "Create a new setpag before authenticating");
122 cmd_AddParm(ts, "-names", CMD_LIST, CMD_OPTIONAL, "multiple user names");
124 code = cmd_Dispatch(argc, argv);
128 extern struct passwd *getpwuid();
133 static char gpbuf[BUFSIZ];
134 /* read a password from stdin, stop on \n or eof */
136 memset(gpbuf, 0, sizeof(gpbuf));
137 for (i = 0; i < (sizeof(gpbuf) - 1); i++) {
139 if (tc == '\n' || tc == EOF)
147 CommandProc(struct cmd_syndesc *as, void *arock)
149 char name[MAXKTCNAMELEN];
150 char instance[MAXKTCNAMELEN];
151 char cell[MAXKTCREALMLEN];
152 char realm[MAXKTCREALMLEN];
153 afs_uint32 serverList[MAXSERVERS];
154 char *lcell; /* local cellname */
155 char lrealm[MAXKTCREALMLEN]; /* uppercase copy of local cellname */
158 Date lifetime; /* requested ticket lifetime */
161 struct passwd *pw = &pwent;
162 struct passwd *lclpw = &pwent;
165 static char rn[] = "klog"; /*Routine name */
166 static int Pipe = 0; /* reading from a pipe */
167 static int Silent = 0; /* Don't want error messages */
169 int explicit; /* servers specified explicitly */
170 int local; /* explicit cell is same a local one */
171 int foundPassword = 0; /*Not yet, anyway */
172 int foundExplicitCell = 0; /*Not yet, anyway */
173 int writeTicketFile = 0; /* write ticket file to /tmp */
174 afs_int32 password_expires = -1;
176 char *reason; /* string describing errors */
178 /* blow away command line arguments */
179 for (i = 1; i < zero_argc; i++)
180 memset(zero_argv[i], 0, strlen(zero_argv[i]));
183 /* first determine quiet flag based on -silent switch */
184 Silent = (as->parms[aSILENT].items ? 1 : 0);
185 Pipe = (as->parms[aPIPE].items ? 1 : 0);
187 /* Determine if we should also do a setpag based on -setpag switch */
188 dosetpag = (as->parms[aSETPAG].items ? 1 : 0);
190 if (as->parms[aCELL].items) {
192 * cell name explicitly mentioned; take it in if no other cell name
193 * has already been specified and if the name actually appears. If
194 * the given cell name differs from our own, we don't do a lookup.
196 foundExplicitCell = 1;
197 strncpy(realm, as->parms[aCELL].items->data, sizeof(realm));
198 /* XXX the following is just a hack to handle the afscell environment XXX */
199 (void)afsconf_GetCellInfo((struct afsconf_dir *)0, realm, 0,
200 (struct afsconf_cell *)0);
204 p if (code || !(lcell = ka_LocalCell())) {
207 afs_com_err(rn, code, "Can't get local cell name!");
210 if (code = ka_CellToRealm(lcell, lrealm, 0))
213 strcpy(instance, "");
215 /* Parse our arguments. */
217 if (as->parms[aTMP].items) {
221 if (as->parms[aCELL].items) {
223 * cell name explicitly mentioned; take it in if no other cell name
224 * has already been specified and if the name actually appears. If
225 * the given cell name differs from our own, we don't do a lookup.
227 foundExplicitCell = 1;
228 strncpy(realm, as->parms[aCELL].items->data, sizeof(realm));
231 if (as->parms[aSERVERS].items) {
232 /* explicit server list */
235 char *ap[MAXSERVERS + 2];
237 for (ip = as->parms[aSERVERS].items, i = 2; ip; ip = ip->next, i++)
241 code = ubik_ParseClientList(i, ap, serverList);
244 afs_com_err(rn, code, "could not parse server list");
252 if (as->parms[aPRINCIPAL].items) {
253 ka_ParseLoginName(as->parms[aPRINCIPAL].items->data, name, instance,
255 if (strlen(instance) > 0)
258 "Non-null instance (%s) may cause strange behavior.\n",
261 if (strlen(cell) > 0) {
262 if (foundExplicitCell) {
265 "%s: May not specify an explicit cell twice.\n",
270 foundExplicitCell = 1;
271 strncpy(realm, cell, sizeof(realm));
273 lclpw->pw_name = name;
275 /* No explicit name provided: use Unix uid. */
276 pw = getpwuid(getuid());
280 "Can't figure out your name in local cell %s from your user id.\n",
282 fprintf(stderr, "Try providing the user name.\n");
284 KLOGEXIT(KABADARGUMENT);
289 if (as->parms[aPASSWORD].items) {
291 * Current argument is the desired password string. Remember it in
292 * our local buffer, and zero out the argument string - anyone can
293 * see it there with ps!
296 strncpy(passwd, as->parms[aPASSWORD].items->data, sizeof(passwd));
297 memset(as->parms[aPASSWORD].items->data, 0,
298 strlen(as->parms[aPASSWORD].items->data));
301 if (as->parms[aLIFETIME].items) {
302 char *life = as->parms[aLIFETIME].items->data;
303 char *sp; /* string ptr to rest of life */
304 lifetime = 3600 * strtol(life, &sp, 0); /* hours */
308 fprintf(stderr, "%s: translating '%s' to lifetime\n", rn,
313 life = sp + 1; /* skip the colon */
314 lifetime += 60 * strtol(life, &sp, 0); /* minutes */
319 lifetime += strtol(life, &sp, 0); /* seconds */
328 if (lifetime > MAXKTCTICKETLIFETIME) {
331 "%s: a lifetime of %.2f hours is too long, must be less than %d.\n",
332 rn, (double)lifetime / 3600.0,
333 MAXKTCTICKETLIFETIME / 3600);
334 KLOGEXIT(KABADARGUMENT);
339 if (!foundExplicitCell)
340 strcpy(realm, lcell);
341 if (code = ka_CellToRealm(realm, realm, &local)) {
343 afs_com_err(rn, code, "Can't convert cell to realm");
347 /* Get the password if it wasn't provided. */
348 if (!foundPassword) {
350 strncpy(passwd, getpipepass(), sizeof(passwd));
352 if (ka_UserReadPassword
353 ("Password:", passwd, sizeof(passwd), &reason)) {
354 fprintf(stderr, "Unable to login because %s.\n", reason);
355 KLOGEXIT(KABADARGUMENT);
361 ka_ExplicitCell(realm, serverList);
363 for (itp = as->parms[aNAMES].items; itp; itp = itp->next) {
364 *name = *instance = *cell = '\0';
365 ka_ParseLoginName(itp->data, name, instance, cell);
366 if (strlen(cell) > 0) {
367 foundExplicitCell = 1;
368 strncpy(realm, cell, sizeof(realm));
372 ka_UserAuthenticateGeneral(KA_USERAUTH_VERSION +
373 (dosetpag ? KA_USERAUTH_DOSETPAG2 : 0),
374 name, instance, realm, passwd,
375 lifetime, &password_expires, 0,
379 fprintf(stderr, "Unable to authenticate to AFS because %s.\n",
385 if (password_expires >= 0) {
386 printf("password expires at %ld\n", password_expires);