pwd_mkdb.c revision 1.1
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[] = "@(#)pwd_mkdb.c 5.5 (Berkeley) 5/6/91"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/stat.h> 46 #include <signal.h> 47 #include <fcntl.h> 48 #include <db.h> 49 #include <pwd.h> 50 #include <errno.h> 51 #include <limits.h> 52 #include <stdio.h> 53 #include <string.h> 54 55 #define INSECURE 1 56 #define SECURE 2 57 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 58 #define PERM_SECURE (S_IRUSR|S_IWUSR) 59 60 char *progname = "pwd_mkdb"; 61 62 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; 63 static struct passwd pwd; /* password structure */ 64 static char *pname; /* password file name */ 65 66 main(argc, argv) 67 int argc; 68 char **argv; 69 { 70 extern int optind; 71 register int len, makeold; 72 register char *p, *t; 73 FILE *fp, *oldfp; 74 DB *dp, *edp; 75 sigset_t set; 76 DBT data, key; 77 int ch, cnt, tfd; 78 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; 79 80 makeold = 0; 81 while ((ch = getopt(argc, argv, "pv")) != EOF) 82 switch(ch) { 83 case 'p': /* create V7 "file.orig" */ 84 makeold = 1; 85 break; 86 case 'v': /* backward compatible */ 87 break; 88 case '?': 89 default: 90 usage(); 91 } 92 argc -= optind; 93 argv += optind; 94 95 if (argc != 1) 96 usage(); 97 98 /* 99 * This could be done to allow the user to interrupt. Probably 100 * not worth the effort. 101 */ 102 sigemptyset(&set); 103 sigaddset(&set, SIGTSTP); 104 sigaddset(&set, SIGHUP); 105 sigaddset(&set, SIGINT); 106 sigaddset(&set, SIGQUIT); 107 sigaddset(&set, SIGTERM); 108 (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); 109 110 pname = *argv; 111 /* Open the original password file */ 112 if (!(fp = fopen(pname, "r"))) 113 error(pname); 114 115 /* Open the temporary insecure password database. */ 116 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 117 dp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE, NULL); 118 if (!dp) 119 error(buf); 120 clean = FILE_INSECURE; 121 122 /* Open the temporary encrypted password database. */ 123 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 124 edp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_SECURE, NULL); 125 if (!edp) 126 error(buf); 127 clean = FILE_SECURE; 128 129 /* 130 * Open file for old password file. Minor trickiness -- don't want to 131 * chance the file already existing, since someone (stupidly) might 132 * still be using this for permission checking. So, open it first and 133 * fdopen the resulting fd. Don't really care who reads it. 134 */ 135 if (makeold) { 136 (void)sprintf(buf, "%s.orig", pname); 137 if ((tfd = open(buf, 138 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 139 error(buf); 140 if (!(oldfp = fdopen(tfd, "w"))) 141 error(buf); 142 clean = FILE_ORIG; 143 } 144 145 /* 146 * The databases actually contain three copies of the original data. 147 * Each password file entry is converted into a rough approximation 148 * of a ``struct passwd'', with the strings placed inline. This 149 * object is then stored as the data for three separate keys. The 150 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 151 * character. The second key is the pw_uid field prepended by the 152 * _PW_KEYBYUID character. The third key is the line number in the 153 * original file prepended by the _PW_KEYBYNUM character. (The special 154 * characters are prepended to ensure that the keys do not collide.) 155 */ 156 data.data = (u_char *)buf; 157 key.data = (u_char *)tbuf; 158 for (cnt = 1; scan(fp, &pwd); ++cnt) { 159 #define COMPACT(e) t = e; while (*p++ = *t++); 160 /* Create insecure data. */ 161 p = buf; 162 COMPACT(pwd.pw_name); 163 COMPACT("*"); 164 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 165 p += sizeof(int); 166 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 167 p += sizeof(int); 168 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 169 p += sizeof(time_t); 170 COMPACT(pwd.pw_class); 171 COMPACT(pwd.pw_gecos); 172 COMPACT(pwd.pw_dir); 173 COMPACT(pwd.pw_shell); 174 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 175 p += sizeof(time_t); 176 data.size = p - buf; 177 178 /* Store insecure by name. */ 179 tbuf[0] = _PW_KEYBYNAME; 180 len = strlen(pwd.pw_name); 181 bcopy(pwd.pw_name, tbuf + 1, len); 182 key.size = len + 1; 183 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 184 error("put"); 185 186 /* Store insecure by number. */ 187 tbuf[0] = _PW_KEYBYNUM; 188 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 189 key.size = sizeof(cnt) + 1; 190 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 191 error("put"); 192 193 /* Store insecure by uid. */ 194 tbuf[0] = _PW_KEYBYUID; 195 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 196 key.size = sizeof(pwd.pw_uid) + 1; 197 if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) 198 error("put"); 199 200 /* Create secure data. */ 201 p = buf; 202 COMPACT(pwd.pw_name); 203 COMPACT(pwd.pw_passwd); 204 bcopy((char *)&pwd.pw_uid, p, sizeof(int)); 205 p += sizeof(int); 206 bcopy((char *)&pwd.pw_gid, p, sizeof(int)); 207 p += sizeof(int); 208 bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); 209 p += sizeof(time_t); 210 COMPACT(pwd.pw_class); 211 COMPACT(pwd.pw_gecos); 212 COMPACT(pwd.pw_dir); 213 COMPACT(pwd.pw_shell); 214 bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); 215 p += sizeof(time_t); 216 data.size = p - buf; 217 218 /* Store secure by name. */ 219 tbuf[0] = _PW_KEYBYNAME; 220 len = strlen(pwd.pw_name); 221 bcopy(pwd.pw_name, tbuf + 1, len); 222 key.size = len + 1; 223 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 224 error("put"); 225 226 /* Store secure by number. */ 227 tbuf[0] = _PW_KEYBYNUM; 228 bcopy((char *)&cnt, tbuf + 1, sizeof(cnt)); 229 key.size = sizeof(cnt) + 1; 230 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 231 error("put"); 232 233 /* Store secure by uid. */ 234 tbuf[0] = _PW_KEYBYUID; 235 bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid)); 236 key.size = sizeof(pwd.pw_uid) + 1; 237 if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) 238 error("put"); 239 240 /* Create original format password file entry */ 241 if (makeold) 242 (void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n", 243 pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, 244 pwd.pw_dir, pwd.pw_shell); 245 } 246 (void)(dp->close)(dp); 247 (void)(edp->close)(edp); 248 if (makeold) { 249 (void)fsync(oldfp); 250 (void)fclose(oldfp); 251 } 252 253 /* Set master.passwd permissions, in case caller forgot. */ 254 (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); 255 (void)fclose(fp); 256 257 /* Install as the real password files. */ 258 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 259 mv(buf, _PATH_MP_DB); 260 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 261 mv(buf, _PATH_SMP_DB); 262 if (makeold) { 263 (void)sprintf(buf, "%s.orig", pname); 264 mv(buf, _PATH_PASSWD); 265 } 266 /* 267 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 268 * all use flock(2) on it to block other incarnations of themselves. 269 * The rename means that everything is unlocked, as the original file 270 * can no longer be accessed. 271 */ 272 mv(pname, _PATH_MASTERPASSWD); 273 exit(0); 274 } 275 276 scan(fp, pw) 277 FILE *fp; 278 struct passwd *pw; 279 { 280 static int lcnt; 281 static char line[LINE_MAX]; 282 char *p; 283 284 if (!fgets(line, sizeof(line), fp)) 285 return(0); 286 ++lcnt; 287 /* 288 * ``... if I swallow anything evil, put your fingers down my 289 * throat...'' 290 * -- The Who 291 */ 292 if (!(p = index(line, '\n'))) { 293 (void)fprintf(stderr, "pwd_mkdb: line too long\n"); 294 goto fmt; 295 296 } 297 *p = '\0'; 298 if (!pw_scan(line, pw)) { 299 (void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt); 300 fmt: errno = EFTYPE; 301 error(pname); 302 exit(1); 303 } 304 } 305 306 mv(from, to) 307 char *from, *to; 308 { 309 int sverrno; 310 char buf[MAXPATHLEN]; 311 312 if (rename(from, to)) { 313 sverrno = errno; 314 (void)sprintf(buf, "%s to %s", from, to); 315 errno = sverrno; 316 error(buf); 317 } 318 } 319 320 error(name) 321 char *name; 322 { 323 (void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno)); 324 cleanup(); 325 exit(1); 326 } 327 328 cleanup() 329 { 330 char buf[MAXPATHLEN]; 331 332 switch(clean) { 333 case FILE_ORIG: 334 (void)sprintf(buf, "%s.orig", pname); 335 (void)unlink(buf); 336 /* FALLTHROUGH */ 337 case FILE_SECURE: 338 (void)sprintf(buf, "%s.tmp", _PATH_SMP_DB); 339 (void)unlink(buf); 340 /* FALLTHROUGH */ 341 case FILE_INSECURE: 342 (void)sprintf(buf, "%s.tmp", _PATH_MP_DB); 343 (void)unlink(buf); 344 } 345 } 346 347 usage() 348 { 349 (void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n"); 350 exit(1); 351 } 352
Indexes created Tue Sep 30 17:09:57 GMT 2025