chpass.tproj/edit.c

   1 /*
   2  * Copyright (c) 1999-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1990, 1993, 1994
  25  *      The Regents of the University of California.  All rights reserved.
  26  * Copyright (c) 2002 Networks Associates Technology, Inc.
  27  * All rights reserved.
  28  *
  29  * Portions of this software were developed for the FreeBSD Project by
  30  * ThinkSec AS and NAI Labs, the Security Research Division of Network
  31  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
  32  * ("CBOSS"), as part of the DARPA CHATS research program.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62
  63 #if 0
  64 #if 0
  65 #ifndef lint
  66 static char sccsid[] = "@(#)edit.c      8.3 (Berkeley) 4/2/94";
  67 #endif /* not lint */
  68 #endif
  69
  70 #include <sys/cdefs.h>
  71 __FBSDID("$FreeBSD: src/usr.bin/chpass/edit.c,v 1.23 2003/04/09 18:18:42 des Exp $");
  72 #endif
  73
  74 #include <sys/param.h>
  75 #include <sys/stat.h>
  76
  77 #include <ctype.h>
  78 #include <err.h>
  79 #include <errno.h>
  80 #include <paths.h>
  81 #include <pwd.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <string.h>
  85 #include <unistd.h>
  86
  87 #ifndef OPEN_DIRECTORY
  88 #include <pw_scan.h>
  89 #include <libutil.h>
  90 #endif
  91
  92 #include "chpass.h"
  93
  94 #ifdef OPEN_DIRECTORY
  95 static int display(const char *tfn, CFDictionaryRef attrs);
  96 static CFDictionaryRef verify(const char *tfn, CFDictionaryRef attrs);
  97 #else
  98 static int display(const char *tfn, struct passwd *pw);
  99 static struct passwd *verify(const char *tfn, struct passwd *pw);
 100 #endif
 101
 102 #ifdef OPEN_DIRECTORY
 103 CFDictionaryRef
 104 edit(const char *tfn, CFDictionaryRef pw)
 105 #else
 106 struct passwd *
 107 edit(const char *tfn, struct passwd *pw)
 108 #endif
 109 {
 110 #ifdef OPEN_DIRECTORY
 111         CFDictionaryRef npw;
 112 #else
 113         struct passwd *npw;
 114 #endif
 115         char *line;
 116         size_t len;
 117
 118         if (display(tfn, pw) == -1)
 119                 return (NULL);
 120         for (;;) {
 121 #ifdef OPEN_DIRECTORY
 122                 switch (editfile(tfn)) {
 123 #else
 124                 switch (pw_edit(1)) {
 125 #endif
 126                 case -1:
 127                         return (NULL);
 128                 case 0:
 129 #ifdef OPEN_DIRECTORY
 130                         return (NULL);
 131 #else
 132                         return (pw_dup(pw));
 133 #endif
 134                 default:
 135                         break;
 136                 }
 137                 if ((npw = verify(tfn, pw)) != NULL)
 138                         return (npw);
 139 #ifndef OPEN_DIRECTORY
 140                 free(npw);
 141 #endif
 142                 printf("re-edit the password file? ");
 143                 fflush(stdout);
 144                 if ((line = fgetln(stdin, &len)) == NULL) {
 145                         warn("fgetln()");
 146                         return (NULL);
 147                 }
 148                 if (len > 0 && (*line == 'N' || *line == 'n'))
 149                         return (NULL);
 150         }
 151 }
 152
 153 /*
 154  * display --
 155  *      print out the file for the user to edit; strange side-effect:
 156  *      set conditional flag if the user gets to edit the shell.
 157  */
 158 #if OPEN_DIRECTORY
 159 static int
 160 display(const char *tfn, CFDictionaryRef attrs)
 161 #else
 162 static int
 163 display(const char *tfn, struct passwd *pw)
 164 #endif
 165 {
 166         FILE *fp;
 167 #ifndef OPEN_DIRECTORY
 168         char *bp, *gecos, *p;
 169 #endif
 170
 171         if ((fp = fopen(tfn, "w")) == NULL) {
 172                 warn("%s", tfn);
 173                 return (-1);
 174         }
 175
 176 #ifdef OPEN_DIRECTORY
 177         CFArrayRef values = CFDictionaryGetValue(attrs, kODAttributeTypeRecordName);
 178         CFStringRef username = (values && CFArrayGetCount(values)) > 0 ? CFArrayGetValueAtIndex(values, 0) : NULL;
 179
 180         (void)cfprintf(fp,
 181                 "# Changing user information for %@.\n"
 182             "# Use \"passwd\" to change the password.\n"
 183             "##\n"
 184                 "# Open Directory%s%@\n"
 185                 "##\n",
 186                 username,
 187                 DSPath ? ": " : "",
 188                 DSPath ? DSPath : CFSTR(""));
 189
 190         int ndisplayed = 0;
 191         ENTRY* ep;
 192         for (ep = list; ep->prompt; ep++)
 193                 if (!ep->restricted) {
 194                         ep->display(attrs, *ep->attrName, ep->prompt, fp);
 195                         ndisplayed++;
 196                 }
 197         if(!ndisplayed) {
 198                 (void)fprintf(fp, "###################################\n");
 199                 (void)fprintf(fp, "# No fields are available to change\n");
 200                 (void)fprintf(fp, "###################################\n");
 201         }
 202 #else OPEN_DIRECTORY
 203         (void)fprintf(fp,
 204             "#Changing user information for %s.\n", pw->pw_name);
 205         if (master_mode) {
 206                 (void)fprintf(fp, "Login: %s\n", pw->pw_name);
 207                 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
 208                 (void)fprintf(fp, "Uid [#]: %lu\n", (unsigned long)pw->pw_uid);
 209                 (void)fprintf(fp, "Gid [# or name]: %lu\n",
 210                     (unsigned long)pw->pw_gid);
 211                 (void)fprintf(fp, "Change [month day year]: %s\n",
 212                     ttoa(pw->pw_change));
 213                 (void)fprintf(fp, "Expire [month day year]: %s\n",
 214                     ttoa(pw->pw_expire));
 215                 (void)fprintf(fp, "Class: %s\n", pw->pw_class);
 216                 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
 217                 (void)fprintf(fp, "Shell: %s\n",
 218                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 219         }
 220         /* Only admin can change "restricted" shells. */
 221 #if 0
 222         else if (ok_shell(pw->pw_shell))
 223                 /*
 224                  * Make shell a restricted field.  Ugly with a
 225                  * necklace, but there's not much else to do.
 226                  */
 227 #else
 228         else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) ||
 229             master_mode)
 230                 /*
 231                  * If change not restrict (table.c) and standard shell
 232                  *      OR if root, then allow editing of shell.
 233                  */
 234 #endif
 235                 (void)fprintf(fp, "Shell: %s\n",
 236                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 237         else
 238                 list[E_SHELL].restricted = 1;
 239
 240         if ((bp = gecos = strdup(pw->pw_gecos)) == NULL) {
 241                 warn(NULL);
 242                 fclose(fp);
 243                 return (-1);
 244         }
 245
 246         p = strsep(&bp, ",");
 247         p = strdup(p ? p : "");
 248         list[E_NAME].save = p;
 249         if (!list[E_NAME].restricted || master_mode)
 250           (void)fprintf(fp, "Full Name: %s\n", p);
 251
 252         p = strsep(&bp, ",");
 253         p = strdup(p ? p : "");
 254         list[E_LOCATE].save = p;
 255         if (!list[E_LOCATE].restricted || master_mode)
 256           (void)fprintf(fp, "Office Location: %s\n", p);
 257
 258         p = strsep(&bp, ",");
 259         p = strdup(p ? p : "");
 260         list[E_BPHONE].save = p;
 261         if (!list[E_BPHONE].restricted || master_mode)
 262           (void)fprintf(fp, "Office Phone: %s\n", p);
 263
 264         p = strsep(&bp, ",");
 265         p = strdup(p ? p : "");
 266         list[E_HPHONE].save = p;
 267         if (!list[E_HPHONE].restricted || master_mode)
 268           (void)fprintf(fp, "Home Phone: %s\n", p);
 269
 270         bp = strdup(bp ? bp : "");
 271         list[E_OTHER].save = bp;
 272         if (!list[E_OTHER].restricted || master_mode)
 273           (void)fprintf(fp, "Other information: %s\n", bp);
 274
 275         free(gecos);
 276 #endif /* OPEN_DIRECTORY */
 277
 278         (void)fchown(fileno(fp), getuid(), getgid());
 279         (void)fclose(fp);
 280         return (0);
 281 }
 282
 283 #ifdef OPEN_DIRECTORY
 284 static CFDictionaryRef
 285 verify(const char* tfn, CFDictionaryRef pw)
 286 #else
 287 static struct passwd *
 288 verify(const char *tfn, struct passwd *pw)
 289 #endif
 290 {
 291 #ifdef OPEN_DIRECTORY
 292         CFMutableDictionaryRef npw;
 293 #else
 294         struct passwd *npw;
 295 #endif
 296         ENTRY *ep;
 297         char *buf, *p, *val;
 298         struct stat sb;
 299         FILE *fp;
 300         int line;
 301         size_t len;
 302
 303 #ifdef OPEN_DIRECTORY
 304         if ((npw = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)) == NULL)
 305                 return (NULL);
 306 #else
 307         if ((pw = pw_dup(pw)) == NULL)
 308                 return (NULL);
 309 #endif
 310         if ((fp = fopen(tfn, "r")) == NULL ||
 311             fstat(fileno(fp), &sb) == -1) {
 312                 warn("%s", tfn);
 313 #ifndef OPEN_DIRECTORY
 314                 free(pw);
 315 #endif
 316                 return (NULL);
 317         }
 318         if (sb.st_size == 0) {
 319                 warnx("corrupted temporary file");
 320                 fclose(fp);
 321 #ifndef OPEN_DIRECTORY
 322                 free(pw);
 323 #endif
 324                 return (NULL);
 325         }
 326         val = NULL;
 327         for (line = 1; (buf = fgetln(fp, &len)) != NULL; ++line) {
 328                 if (*buf == '\0' || *buf == '#')
 329                         continue;
 330                 while (len > 0 && isspace(buf[len - 1]))
 331                         --len;
 332                 for (ep = list;; ++ep) {
 333                         if (!ep->prompt) {
 334                                 warnx("%s: unrecognized field on line %d",
 335                                     tfn, line);
 336                                 goto bad;
 337                         }
 338                         if (ep->len > len)
 339                                 continue;
 340                         if (strncasecmp(buf, ep->prompt, ep->len) != 0)
 341                                 continue;
 342                         if (ep->restricted && !master_mode) {
 343                                 warnx("%s: you may not change the %s field",
 344                                     tfn, ep->prompt);
 345                                 goto bad;
 346                         }
 347                         for (p = buf; p < buf + len && *p != ':'; ++p)
 348                                 /* nothing */ ;
 349                         if (*p != ':') {
 350                                 warnx("%s: line %d corrupted", tfn, line);
 351                                 goto bad;
 352                         }
 353                         while (++p < buf + len && isspace(*p))
 354                                 /* nothing */ ;
 355                         free(val);
 356                         asprintf(&val, "%.*s", (int)(buf + len - p), p);
 357                         if (val == NULL)
 358                                 goto bad;
 359                         if (ep->except && strpbrk(val, ep->except)) {
 360                                 warnx("%s: invalid character in \"%s\" field '%s'",
 361                                     tfn, ep->prompt, val);
 362                                 goto bad;
 363                         }
 364 #ifdef OPEN_DIRECTORY
 365                         if ((ep->func)(val, NULL, NULL))
 366                                 goto bad;
 367                         {
 368                                 CFStringRef str = CFStringCreateWithCString(NULL, val, kCFStringEncodingUTF8);
 369                                 if (str) {
 370                                         CFDictionarySetValue(npw, *ep->attrName, str);
 371                                         CFRelease(str);
 372                                 }
 373                         }
 374 #else
 375                         if ((ep->func)(val, pw, ep))
 376                                 goto bad;
 377 #endif
 378                         break;
 379                 }
 380         }
 381         free(val);
 382         fclose(fp);
 383
 384 #ifndef OPEN_DIRECTORY
 385         /* Build the gecos field. */
 386         len = asprintf(&p, "%s,%s,%s,%s,%s", list[E_NAME].save,
 387             list[E_LOCATE].save, list[E_BPHONE].save,
 388             list[E_HPHONE].save, list[E_OTHER].save);
 389         if (p == NULL) {
 390                 warn("asprintf()");
 391                 free(pw);
 392                 return (NULL);
 393         }
 394         while (len > 0 && p[len - 1] == ',')
 395                 p[--len] = '\0';
 396         pw->pw_gecos = p;
 397         buf = pw_make(pw);
 398         free(pw);
 399         free(p);
 400         if (buf == NULL) {
 401                 warn("pw_make()");
 402                 return (NULL);
 403         }
 404         npw = pw_scan(buf, PWSCAN_WARN|PWSCAN_MASTER);
 405 #endif /* !OPEN_DIRECTORY */
 406         free(buf);
 407         return (npw);
 408 bad:
 409 #ifndef OPEN_DIRECTORY
 410         free(pw);
 411 #endif
 412         free(val);
 413         fclose(fp);
 414         return (NULL);
 415 }