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
14 #include <afsconfig.h>
15 #include <afs/param.h>
29 #define UBIK_INTERNALS
38 /* Open the auxiliary database file containing failed authentication
39 * counters, and the times at which the last failures occurred.
43 kaux_opendb(char *path)
45 char dbpathname[1024];
46 static char dbname[] = "auxdb";
48 if (strlen(path) < 1024 - strlen(dbname)) { /* bullet-proofing */
50 strcpy(dbpathname, path);
51 strcat(dbpathname, dbname);
53 fd = open(dbpathname, O_CREAT | O_RDWR, 0600);
61 /* close that auxiliary database. Unneccessary, but here for symmetry.
74 * The read and write routines take as a parameter, the offset into
75 * the main database at which a particular user's entry resides. They
76 * then convert that into an offset into the auxiliary database. This
77 * makes the main code a little simpler, though it obscures a small
81 kaux_read(afs_int32 to, /* this is the offset of the user id in the main database.
82 * we do the conversion here - probably a bad idea. */
83 unsigned int *nfailures, afs_uint32 * lasttime)
87 *nfailures = *lasttime = 0;
93 ((to - sizeof(struct kaheader)) / ENTRYSIZE) * (sizeof(int) +
95 /* can't get there from here */
96 if (offset > lseek(fd, offset, SEEK_SET))
99 /* we should just end up with 0 for nfailures and lasttime if EOF is
100 * encountered here, I hope */
101 if ((0 > read(fd, nfailures, sizeof(int)))
102 || (0 > read(fd, lasttime, sizeof(afs_int32)))) {
103 *nfailures = *lasttime = 0;
104 perror("kaux_read()");
111 kaux_write(afs_int32 to, unsigned int nfailures, afs_uint32 lasttime)
119 ((to - sizeof(struct kaheader)) / ENTRYSIZE) * (sizeof(int) +
121 /* can't get there from here */
122 if (offset > lseek(fd, offset, SEEK_SET))
125 if ((write(fd, &nfailures, sizeof(int)) != sizeof(int))
126 || (write(fd, &lasttime, sizeof(afs_int32)) != sizeof(afs_int32)))
127 perror("kaux_write()");
132 /* adjust this user's records to reflect a failure.
133 * locktime is the value stored in the main database that specifies
134 * how long a user's ID should be locked once the attempts limit has
135 * been exceeded. It also functions as the interval during which the
136 * permitted N-1 authentication failures plus the forbidden Nth
137 * failure must occur, in order for the ID to actually be locked. Ie,
138 * all failures which occurred more than _locktime_ seconds ago are
140 * locktime == 0 signifies that the ID should be locked indefinitely
143 kaux_inc(afs_int32 to, afs_uint32 locktime)
145 unsigned int nfailures;
146 afs_uint32 lasttime, now;
150 kaux_read(to, &nfailures, &lasttime);
152 if (locktime && lasttime + locktime < now)
157 kaux_write(to, nfailures, now);
162 * report on whether a particular id is locked or not...
163 * has to get some dirt from ubik.
164 * We multiply the actual number of permitted attempts by two because
165 * klog tries to authenticate twice when the password is bogus: once
166 * with the ka_string_to_key, and once with des_string_to_key, for
167 * Kerberos compatibility. It's easier to frob here than to explain
169 * RETURNS: time when the ID will be unlocked, or 0 if it's not locked.
172 kaux_islocked(afs_int32 to, u_int attempts, u_int locktime)
174 unsigned int nfailures, myshare;
176 struct ubik_debug beaconinfo;
178 /* if attempts is 0, that means there's no limit, so the id
179 * can't ever be locked...
184 kaux_read(to, &nfailures, &lasttime);
186 ubeacon_Debug(&beaconinfo);
187 attempts = attempts * 2;
189 myshare = attempts / beaconinfo.nServers;
190 if (ubeacon_AmSyncSite())
191 myshare += attempts % beaconinfo.nServers;
195 } else if ((nfailures < myshare)
196 || (locktime && lasttime + locktime < time(0))) {
198 } else if (locktime == 0) { /* infinite */
201 return (lasttime + locktime);