/*- * SPDX-License-Identifier: BSD-4-Clause * * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. All rights reserved. * Copyright (c) 2002 Networks Associates Technology, Inc. * All rights reserved. * * Portions of this software were developed for the FreeBSD Project by * ThinkSec AS and NAI Labs, the Security Research Division of Network * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 * ("CBOSS"), as part of the DARPA CHATS research program. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if 0 #ifndef lint static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include "chpass.h" static int display(const char *tfn, struct passwd *pw); static struct passwd *verify(const char *tfn, struct passwd *pw); struct passwd * edit(const char *tfn, struct passwd *pw) { struct passwd *npw; char *line; size_t len; if (display(tfn, pw) == -1) return (NULL); for (;;) { switch (pw_edit(1)) { case -1: return (NULL); case 0: return (pw_dup(pw)); default: break; } if ((npw = verify(tfn, pw)) != NULL) return (npw); free(npw); printf("re-edit the password file? "); fflush(stdout); if ((line = fgetln(stdin, &len)) == NULL) { warn("fgetln()"); return (NULL); } if (len > 0 && (*line == 'N' || *line == 'n')) return (NULL); } } /* * display -- * print out the file for the user to edit; strange side-effect: * set conditional flag if the user gets to edit the shell. */ static int display(const char *tfn, struct passwd *pw) { FILE *fp; char *bp, *gecos, *p; if ((fp = fopen(tfn, "w")) == NULL) { warn("%s", tfn); return (-1); } (void)fprintf(fp, "#Changing user information for %s.\n", pw->pw_name); if (master_mode) { (void)fprintf(fp, "Login: %s\n", pw->pw_name); (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); (void)fprintf(fp, "Uid [#]: %lu\n", (unsigned long)pw->pw_uid); (void)fprintf(fp, "Gid [# or name]: %lu\n", (unsigned long)pw->pw_gid); (void)fprintf(fp, "Change [month day year]: %s\n", ttoa(pw->pw_change)); (void)fprintf(fp, "Expire [month day year]: %s\n", ttoa(pw->pw_expire)); (void)fprintf(fp, "Class: %s\n", pw->pw_class); (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); (void)fprintf(fp, "Shell: %s\n", *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); } /* Only admin can change "restricted" shells. */ #if 0 else if (ok_shell(pw->pw_shell)) /* * Make shell a restricted field. Ugly with a * necklace, but there's not much else to do. */ #else else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) || master_mode) /* * If change not restrict (table.c) and standard shell * OR if root, then allow editing of shell. */ #endif (void)fprintf(fp, "Shell: %s\n", *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); else list[E_SHELL].restricted = 1; if ((bp = gecos = strdup(pw->pw_gecos)) == NULL) { warn(NULL); fclose(fp); return (-1); } p = strsep(&bp, ","); p = strdup(p ? p : ""); list[E_NAME].save = p; if (!list[E_NAME].restricted || master_mode) (void)fprintf(fp, "Full Name: %s\n", p); p = strsep(&bp, ","); p = strdup(p ? p : ""); list[E_LOCATE].save = p; if (!list[E_LOCATE].restricted || master_mode) (void)fprintf(fp, "Office Location: %s\n", p); p = strsep(&bp, ","); p = strdup(p ? p : ""); list[E_BPHONE].save = p; if (!list[E_BPHONE].restricted || master_mode) (void)fprintf(fp, "Office Phone: %s\n", p); p = strsep(&bp, ","); p = strdup(p ? p : ""); list[E_HPHONE].save = p; if (!list[E_HPHONE].restricted || master_mode) (void)fprintf(fp, "Home Phone: %s\n", p); bp = strdup(bp ? bp : ""); list[E_OTHER].save = bp; if (!list[E_OTHER].restricted || master_mode) (void)fprintf(fp, "Other information: %s\n", bp); free(gecos); (void)fchown(fileno(fp), getuid(), getgid()); (void)fclose(fp); return (0); } static struct passwd * verify(const char *tfn, struct passwd *pw) { struct passwd *npw; ENTRY *ep; char *buf, *p, *val; struct stat sb; FILE *fp; int line; size_t len; if ((pw = pw_dup(pw)) == NULL) return (NULL); if ((fp = fopen(tfn, "r")) == NULL || fstat(fileno(fp), &sb) == -1) { warn("%s", tfn); free(pw); return (NULL); } if (sb.st_size == 0) { warnx("corrupted temporary file"); fclose(fp); free(pw); return (NULL); } val = NULL; for (line = 1; (buf = fgetln(fp, &len)) != NULL; ++line) { if (*buf == '\0' || *buf == '#') continue; while (len > 0 && isspace(buf[len - 1])) --len; for (ep = list;; ++ep) { if (!ep->prompt) { warnx("%s: unrecognized field on line %d", tfn, line); goto bad; } if (ep->len > len) continue; if (strncasecmp(buf, ep->prompt, ep->len) != 0) continue; if (ep->restricted && !master_mode) { warnx("%s: you may not change the %s field", tfn, ep->prompt); goto bad; } for (p = buf; p < buf + len && *p != ':'; ++p) /* nothing */ ; if (*p != ':') { warnx("%s: line %d corrupted", tfn, line); goto bad; } while (++p < buf + len && isspace(*p)) /* nothing */ ; free(val); asprintf(&val, "%.*s", (int)(buf + len - p), p); if (val == NULL) goto bad; if (ep->except && strpbrk(val, ep->except)) { warnx("%s: invalid character in \"%s\" field '%s'", tfn, ep->prompt, val); goto bad; } if ((ep->func)(val, pw, ep)) goto bad; break; } } free(val); fclose(fp); /* Build the gecos field. */ len = asprintf(&p, "%s,%s,%s,%s,%s", list[E_NAME].save, list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save, list[E_OTHER].save); if (p == NULL) { warn("asprintf()"); free(pw); return (NULL); } while (len > 0 && p[len - 1] == ',') p[--len] = '\0'; pw->pw_gecos = p; buf = pw_make(pw); free(pw); free(p); if (buf == NULL) { warn("pw_make()"); return (NULL); } npw = pw_scan(buf, PWSCAN_WARN|PWSCAN_MASTER); free(buf); return (npw); bad: free(pw); free(val); fclose(fp); return (NULL); }