pwd_mkdb.c revision 1.3
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 1.3 1993/08/01 17:57:12 mycroft 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 /* 100 * This could be done to allow the user to interrupt. Probably 101 * not worth the effort. 102 */ 103 sigemptyset(&set); 104 sigaddset(&set, SIGTSTP); 105 sigaddset(&set, SIGHUP); 106 sigaddset(&set, SIGINT); 107 sigaddset(&set, SIGQUIT); 108 sigaddset(&set, SIGTERM); 109 (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); 110 111 pname = *argv; 112 /* Open the original password file */ 113 if (!(fp = fopen(pname, "r"))) 114 error(pname); 115 116 /* Open the temporary insecure password database. */ 117 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 118 dp = dbopen(buf, O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, NULL); 119 if (!dp) 120 error(buf); 121 clean = FILE_INSECURE; 122 123 /* Open the temporary encrypted password database. */ 124 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 125 edp = dbopen(buf, O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, NULL); 126 if (!edp) 127 error(buf); 128 clean = FILE_SECURE; 129 130 /* 131 * Open file for old password file. Minor trickiness -- don't want to 132 * chance the file already existing, since someone (stupidly) might 133 * still be using this for permission checking. So, open it first and 134 * fdopen the resulting fd. Don't really care who reads it. 135 */ 136 if (makeold) { 137 (void)sprintf(buf, "%s.orig", pname); 138 if ((tfd = open(buf, 139 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 140 error(buf); 141 if (!(oldfp = fdopen(tfd, "w"))) 142 error(buf); 143 clean = FILE_ORIG; 144 } 145 146 /* 147 * The databases actually contain three copies of the original data. 148 * Each password file entry is converted into a rough approximation 149 * of a ``struct passwd'', with the strings placed inline. This 150 * object is then stored as the data for three separate keys. The 151 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 152 * character. The second key is the pw_uid field prepended by the 153 * _PW_KEYBYUID character. The third key is the line number in the 154 * original file prepended by the _PW_KEYBYNUM character. (The special 155 * characters are prepended to ensure that the keys do not collide.) 156 */ 157 data.data = (u_char *)buf; 158 key.data = (u_char *)tbuf; 159 for (cnt = 1; scan(fp, &pwd); ++cnt) { 160 #define COMPACT(e) t = e; while (*p++ = *t++); 161 /* Create insecure data. */ 162 p = buf; 163 COMPACT(pwd.pw_name); 164 COMPACT("*"); 165 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 166 p += sizeof(int); 167 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 168 p += sizeof(int); 169 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 170 p += sizeof(time_t); 171 COMPACT(pwd.pw_class); 172 COMPACT(pwd.pw_gecos); 173 COMPACT(pwd.pw_dir); 174 COMPACT(pwd.pw_shell); 175 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 176 p += sizeof(time_t); 177 data.size = p - buf; 178 179 /* Store insecure by name. */ 180 tbuf[0] = _PW_KEYBYNAME; 181 len = strlen(pwd.pw_name); 182 bcopy(pwd.pw_name, tbuf + 1, len); 183 key.size = len + 1; 184 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 185 error("put"); 186 187 /* Store insecure by number. */ 188 tbuf[0] = _PW_KEYBYNUM; 189 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 190 key.size = sizeof(cnt) + 1; 191 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 192 error("put"); 193 194 /* Store insecure by uid. */ 195 tbuf[0] = _PW_KEYBYUID; 196 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 197 key.size = sizeof(pwd.pw_uid) + 1; 198 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 199 error("put"); 200 201 /* Create secure data. */ 202 p = buf; 203 COMPACT(pwd.pw_name); 204 COMPACT(pwd.pw_passwd); 205 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 206 p += sizeof(int); 207 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 208 p += sizeof(int); 209 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 210 p += sizeof(time_t); 211 COMPACT(pwd.pw_class); 212 COMPACT(pwd.pw_gecos); 213 COMPACT(pwd.pw_dir); 214 COMPACT(pwd.pw_shell); 215 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 216 p += sizeof(time_t); 217 data.size = p - buf; 218 219 /* Store secure by name. */ 220 tbuf[0] = _PW_KEYBYNAME; 221 len = strlen(pwd.pw_name); 222 bcopy(pwd.pw_name, tbuf + 1, len); 223 key.size = len + 1; 224 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 225 error("put"); 226 227 /* Store secure by number. */ 228 tbuf[0] = _PW_KEYBYNUM; 229 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 230 key.size = sizeof(cnt) + 1; 231 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 232 error("put"); 233 234 /* Store secure by uid. */ 235 tbuf[0] = _PW_KEYBYUID; 236 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 237 key.size = sizeof(pwd.pw_uid) + 1; 238 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 239 error("put"); 240 241 /* Create original format password file entry */ 242 if (makeold) 243 (void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n", 244 pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, 245 pwd.pw_dir, pwd.pw_shell); 246 } 247 (void)(dp->close)(dp); 248 (void)(edp->close)(edp); 249 if (makeold) { 250 (void)fsync(oldfp); 251 (void)fclose(oldfp); 252 } 253 254 /* Set master.passwd permissions, in case caller forgot. */ 255 (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); 256 (void)fclose(fp); 257 258 /* Install as the real password files. */ 259 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 260 mv(buf, _PATH_MP_DB); 261 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 262 mv(buf, _PATH_SMP_DB); 263 if (makeold) { 264 (void)sprintf(buf, "%s.orig", pname); 265 mv(buf, _PATH_PASSWD); 266 } 267 /* 268 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 269 * all use flock(2) on it to block other incarnations of themselves. 270 * The rename means that everything is unlocked, as the original file 271 * can no longer be accessed. 272 */ 273 mv(pname, _PATH_MASTERPASSWD); 274 exit(0); 275 } 276 277 scan(fp, pw) 278 FILE *fp; 279 struct passwd *pw; 280 { 281 static int lcnt; 282 static char line[LINE_MAX]; 283 char *p; 284 285 if (!fgets(line, sizeof(line), fp)) 286 return(0); 287 ++lcnt; 288 /* 289 * ``... if I swallow anything evil, put your fingers down my 290 * throat...'' 291 * -- The Who 292 */ 293 if (!(p = index(line, '\n'))) { 294 (void)fprintf(stderr, "pwd_mkdb: line too long\n"); 295 goto fmt; 296 297 } 298 *p = '\0'; 299 if (!pw_scan(line, pw)) { 300 (void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt); 301 fmt: errno = EFTYPE; 302 error(pname); 303 exit(1); 304 } 305 } 306 307 mv(from, to) 308 char *from, *to; 309 { 310 int sverrno; 311 char buf[MAXPATHLEN]; 312 313 if (rename(from, to)) { 314 sverrno = errno; 315 (void)sprintf(buf, "%s to %s", from, to); 316 errno = sverrno; 317 error(buf); 318 } 319 } 320 321 error(name) 322 char *name; 323 { 324 (void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno)); 325 cleanup(); 326 exit(1); 327 } 328 329 cleanup() 330 { 331 char buf[MAXPATHLEN]; 332 333 switch(clean) { 334 case FILE_ORIG: 335 (void)sprintf(buf, "%s.orig", pname); 336 (void)unlink(buf); 337 /* FALLTHROUGH */ 338 case FILE_SECURE: 339 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 340 (void)unlink(buf); 341 /* FALLTHROUGH */ 342 case FILE_INSECURE: 343 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 344 (void)unlink(buf); 345 } 346 } 347 348 usage() 349 { 350 (void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n"); 351 exit(1); 352 } 353
Indexes created Tue Sep 30 20:09:53 GMT 2025