pwd_mkdb.c revision 1.4
1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)pwd_mkdb.c 5.5 (Berkeley) 5/6/91";*/ 42 static char rcsid[] = "$Id: pwd_mkdb.c,v 1.4 1994/04/10 07:05:59 cgd Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <signal.h> 48 #include <fcntl.h> 49 #include <db.h> 50 #include <pwd.h> 51 #include <errno.h> 52 #include <limits.h> 53 #include <stdio.h> 54 #include <string.h> 55 56 #define INSECURE 1 57 #define SECURE 2 58 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 59 #define PERM_SECURE (S_IRUSR|S_IWUSR) 60 61 char *progname = "pwd_mkdb"; 62 63 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; 64 static struct passwd pwd; /* password structure */ 65 static char *pname; /* password file name */ 66 67 main(argc, argv) 68 int argc; 69 char **argv; 70 { 71 extern int optind; 72 register int len, makeold; 73 register char *p, *t; 74 FILE *fp, *oldfp; 75 DB *dp, *edp; 76 sigset_t set; 77 DBT data, key; 78 int ch, cnt, tfd; 79 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; 80 81 makeold = 0; 82 while ((ch = getopt(argc, argv, "pv")) != EOF) 83 switch(ch) { 84 case 'p': /* create V7 "file.orig" */ 85 makeold = 1; 86 break; 87 case 'v': /* backward compatible */ 88 break; 89 case '?': 90 default: 91 usage(); 92 } 93 argc -= optind; 94 argv += optind; 95 96 if (argc != 1) 97 usage(); 98 99 /* set umask explicitly, so that 077 doesn't mess up /etc/passwd */ 100 umask(S_IWGRP|S_IWOTH); 101 102 /* 103 * This could be done to allow the user to interrupt. Probably 104 * not worth the effort. 105 */ 106 sigemptyset(&set); 107 sigaddset(&set, SIGTSTP); 108 sigaddset(&set, SIGHUP); 109 sigaddset(&set, SIGINT); 110 sigaddset(&set, SIGQUIT); 111 sigaddset(&set, SIGTERM); 112 (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); 113 114 pname = *argv; 115 /* Open the original password file */ 116 if (!(fp = fopen(pname, "r"))) 117 error(pname); 118 119 /* Open the temporary insecure password database. */ 120 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 121 dp = dbopen(buf, O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, NULL); 122 if (!dp) 123 error(buf); 124 clean = FILE_INSECURE; 125 126 /* Open the temporary encrypted password database. */ 127 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 128 edp = dbopen(buf, O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, NULL); 129 if (!edp) 130 error(buf); 131 clean = FILE_SECURE; 132 133 /* 134 * Open file for old password file. Minor trickiness -- don't want to 135 * chance the file already existing, since someone (stupidly) might 136 * still be using this for permission checking. So, open it first and 137 * fdopen the resulting fd. Don't really care who reads it. 138 */ 139 if (makeold) { 140 (void)sprintf(buf, "%s.orig", pname); 141 if ((tfd = open(buf, 142 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 143 error(buf); 144 if (!(oldfp = fdopen(tfd, "w"))) 145 error(buf); 146 clean = FILE_ORIG; 147 } 148 149 /* 150 * The databases actually contain three copies of the original data. 151 * Each password file entry is converted into a rough approximation 152 * of a ``struct passwd'', with the strings placed inline. This 153 * object is then stored as the data for three separate keys. The 154 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 155 * character. The second key is the pw_uid field prepended by the 156 * _PW_KEYBYUID character. The third key is the line number in the 157 * original file prepended by the _PW_KEYBYNUM character. (The special 158 * characters are prepended to ensure that the keys do not collide.) 159 */ 160 data.data = (u_char *)buf; 161 key.data = (u_char *)tbuf; 162 for (cnt = 1; scan(fp, &pwd); ++cnt) { 163 #define COMPACT(e) t = e; while (*p++ = *t++); 164 /* Create insecure data. */ 165 p = buf; 166 COMPACT(pwd.pw_name); 167 COMPACT("*"); 168 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 169 p += sizeof(int); 170 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 171 p += sizeof(int); 172 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 173 p += sizeof(time_t); 174 COMPACT(pwd.pw_class); 175 COMPACT(pwd.pw_gecos); 176 COMPACT(pwd.pw_dir); 177 COMPACT(pwd.pw_shell); 178 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 179 p += sizeof(time_t); 180 data.size = p - buf; 181 182 /* Store insecure by name. */ 183 tbuf[0] = _PW_KEYBYNAME; 184 len = strlen(pwd.pw_name); 185 bcopy(pwd.pw_name, tbuf + 1, len); 186 key.size = len + 1; 187 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 188 error("put"); 189 190 /* Store insecure by number. */ 191 tbuf[0] = _PW_KEYBYNUM; 192 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 193 key.size = sizeof(cnt) + 1; 194 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 195 error("put"); 196 197 /* Store insecure by uid. */ 198 tbuf[0] = _PW_KEYBYUID; 199 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 200 key.size = sizeof(pwd.pw_uid) + 1; 201 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 202 error("put"); 203 204 /* Create secure data. */ 205 p = buf; 206 COMPACT(pwd.pw_name); 207 COMPACT(pwd.pw_passwd); 208 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 209 p += sizeof(int); 210 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 211 p += sizeof(int); 212 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 213 p += sizeof(time_t); 214 COMPACT(pwd.pw_class); 215 COMPACT(pwd.pw_gecos); 216 COMPACT(pwd.pw_dir); 217 COMPACT(pwd.pw_shell); 218 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 219 p += sizeof(time_t); 220 data.size = p - buf; 221 222 /* Store secure by name. */ 223 tbuf[0] = _PW_KEYBYNAME; 224 len = strlen(pwd.pw_name); 225 bcopy(pwd.pw_name, tbuf + 1, len); 226 key.size = len + 1; 227 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 228 error("put"); 229 230 /* Store secure by number. */ 231 tbuf[0] = _PW_KEYBYNUM; 232 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 233 key.size = sizeof(cnt) + 1; 234 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 235 error("put"); 236 237 /* Store secure by uid. */ 238 tbuf[0] = _PW_KEYBYUID; 239 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 240 key.size = sizeof(pwd.pw_uid) + 1; 241 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 242 error("put"); 243 244 /* Create original format password file entry */ 245 if (makeold) 246 (void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n", 247 pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, 248 pwd.pw_dir, pwd.pw_shell); 249 } 250 (void)(dp->close)(dp); 251 (void)(edp->close)(edp); 252 if (makeold) { 253 (void)fsync(oldfp); 254 (void)fclose(oldfp); 255 } 256 257 /* Set master.passwd permissions, in case caller forgot. */ 258 (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); 259 (void)fclose(fp); 260 261 /* Install as the real password files. */ 262 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 263 mv(buf, _PATH_MP_DB); 264 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 265 mv(buf, _PATH_SMP_DB); 266 if (makeold) { 267 (void)sprintf(buf, "%s.orig", pname); 268 mv(buf, _PATH_PASSWD); 269 } 270 /* 271 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 272 * all use flock(2) on it to block other incarnations of themselves. 273 * The rename means that everything is unlocked, as the original file 274 * can no longer be accessed. 275 */ 276 mv(pname, _PATH_MASTERPASSWD); 277 exit(0); 278 } 279 280 scan(fp, pw) 281 FILE *fp; 282 struct passwd *pw; 283 { 284 static int lcnt; 285 static char line[LINE_MAX]; 286 char *p; 287 288 if (!fgets(line, sizeof(line), fp)) 289 return(0); 290 ++lcnt; 291 /* 292 * ``... if I swallow anything evil, put your fingers down my 293 * throat...'' 294 * -- The Who 295 */ 296 if (!(p = index(line, '\n'))) { 297 (void)fprintf(stderr, "pwd_mkdb: line too long\n"); 298 goto fmt; 299 300 } 301 *p = '\0'; 302 if (!pw_scan(line, pw)) { 303 (void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt); 304 fmt: errno = EFTYPE; 305 error(pname); 306 exit(1); 307 } 308 } 309 310 mv(from, to) 311 char *from, *to; 312 { 313 int sverrno; 314 char buf[MAXPATHLEN]; 315 316 if (rename(from, to)) { 317 sverrno = errno; 318 (void)sprintf(buf, "%s to %s", from, to); 319 errno = sverrno; 320 error(buf); 321 } 322 } 323 324 error(name) 325 char *name; 326 { 327 (void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno)); 328 cleanup(); 329 exit(1); 330 } 331 332 cleanup() 333 { 334 char buf[MAXPATHLEN]; 335 336 switch(clean) { 337 case FILE_ORIG: 338 (void)sprintf(buf, "%s.orig", pname); 339 (void)unlink(buf); 340 /* FALLTHROUGH */ 341 case FILE_SECURE: 342 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 343 (void)unlink(buf); 344 /* FALLTHROUGH */ 345 case FILE_INSECURE: 346 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 347 (void)unlink(buf); 348 } 349 } 350 351 usage() 352 { 353 (void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n"); 354 exit(1); 355 } 356
Indexes created Tue Sep 30 17:09:57 GMT 2025