diff options
Diffstat (limited to 'usr.sbin/pw/pw_user.c')
| -rw-r--r-- | usr.sbin/pw/pw_user.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/usr.sbin/pw/pw_user.c b/usr.sbin/pw/pw_user.c new file mode 100644 index 0000000000000..ebc754a774a7b --- /dev/null +++ b/usr.sbin/pw/pw_user.c @@ -0,0 +1,1110 @@ +/*- + * Copyright (C) 1996 + * David L. Nugent. All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT 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 DAVID L. NUGENT 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. + * + * $FreeBSD$ + */ + +#include <unistd.h> +#include <fcntl.h> +#include <ctype.h> +#include <paths.h> +#include <sys/param.h> +#include <dirent.h> +#include <termios.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <utmp.h> +#if defined(USE_MD5RAND) +#include <md5.h> +#endif +#include "pw.h" +#include "bitmap.h" +#include "pwupd.h" + +#if (MAXLOGNAME-1) > UT_NAMESIZE +#define LOGNAMESIZE UT_NAMESIZE +#else +#define LOGNAMESIZE (MAXLOGNAME-1) +#endif + +static int print_user(struct passwd * pwd, int pretty); +static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); +static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); +static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); +static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); +static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); +static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); +static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); +static char *shell_path(char const * path, char *shells[], char *sh); +static void rmat(uid_t uid); +static void rmskey(char const * name); + +/*- + * -C config configuration file + * -q quiet operation + * -n name login name + * -u uid user id + * -c comment user name/comment + * -d directory home directory + * -e date account expiry date + * -p date password expiry date + * -g grp primary group + * -G grp1,grp2 additional groups + * -m [ -k dir ] create and set up home + * -s shell name of login shell + * -o duplicate uid ok + * -L class user class + * -l name new login name + * -h fd password filehandle + * -F force print or add + * Setting defaults: + * -D set user defaults + * -b dir default home root dir + * -e period default expiry period + * -p period default password change period + * -g group default group + * -G grp1,grp2.. default additional groups + * -L class default login class + * -k dir default home skeleton + * -s shell default shell + * -w method default password method + */ + +int +pw_user(struct userconf * cnf, int mode, struct cargs * args) +{ + int r, r1; + char *p = NULL; + struct carg *a_name; + struct carg *a_uid; + struct carg *arg; + struct passwd *pwd = NULL; + struct group *grp; + struct stat st; + char line[_PASSWORD_LEN+1]; + + static struct passwd fakeuser = + { + NULL, + "*", + -1, + -1, + 0, + "", + "User &", + "/bin/sh", + 0, + 0 + }; + + /* + * With M_NEXT, we only need to return the + * next uid to stdout + */ + if (mode == M_NEXT) + { + uid_t next = pw_uidpolicy(cnf, args); + if (getarg(args, 'q')) + return next; + printf("%ld:", (long)next); + pw_group(cnf, mode, args); + return EXIT_SUCCESS; + } + + /* + * We can do all of the common legwork here + */ + + if ((arg = getarg(args, 'b')) != NULL) { + cnf->home = arg->val; + } + + /* + * If we'll need to use it or we're updating it, + * then create the base home directory if necessary + */ + if (arg != NULL || getarg(args, 'm') != NULL) { + int l = strlen(cnf->home); + + if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ + cnf->home[--l] = '\0'; + + if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ + cmderr(EX_DATAERR, "invalid base directory for home '%s'\n", cnf->home); + + if (stat(cnf->home, &st) == -1) { + char dbuf[MAXPATHLEN]; + + /* + * This is a kludge especially for Joerg :) + * If the home directory would be created in the root partition, then + * we really create it under /usr which is likely to have more space. + * But we create a symlink from cnf->home -> "/usr" -> cnf->home + */ + if (strchr(cnf->home+1, '/') == NULL) { + strcpy(dbuf, "/usr"); + strncat(dbuf, cnf->home, MAXPATHLEN-5); + if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) { + chown(dbuf, 0, 0); + symlink(dbuf, cnf->home); + } + /* If this falls, fall back to old method */ + } + p = strncpy(dbuf, cnf->home, sizeof dbuf); + dbuf[MAXPATHLEN-1] = '\0'; + if (stat(dbuf, &st) == -1) { + while ((p = strchr(++p, '/')) != NULL) { + *p = '\0'; + if (stat(dbuf, &st) == -1) { + if (mkdir(dbuf, 0755) == -1) + goto direrr; + chown(dbuf, 0, 0); + } else if (!S_ISDIR(st.st_mode)) + cmderr(EX_OSFILE, "'%s' (root home parent) is not a directory\n", dbuf); + *p = '/'; + } + } + if (stat(dbuf, &st) == -1) { + if (mkdir(dbuf, 0755) == -1) { + direrr: cmderr(EX_OSFILE, "mkdir '%s': %s\n", dbuf, strerror(errno)); + } + chown(dbuf, 0, 0); + } + } else if (!S_ISDIR(st.st_mode)) + cmderr(EX_OSFILE, "root home `%s' is not a directory\n", cnf->home); + } + + + if ((arg = getarg(args, 'e')) != NULL) + cnf->expire_days = atoi(arg->val); + + if ((arg = getarg(args, 'y')) != NULL) + cnf->nispasswd = arg->val; + + if ((arg = getarg(args, 'p')) != NULL && arg->val) + cnf->password_days = atoi(arg->val); + + if ((arg = getarg(args, 'g')) != NULL) { + p = arg->val; + if ((grp = getgrnam(p)) == NULL) { + if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL) + cmderr(EX_NOUSER, "group `%s' does not exist\n", p); + } + cnf->default_group = newstr(grp->gr_name); + } + if ((arg = getarg(args, 'L')) != NULL) + cnf->default_class = pw_checkname((u_char *)arg->val, 0); + + if ((arg = getarg(args, 'G')) != NULL && arg->val) { + int i = 0; + + for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { + if ((grp = getgrnam(p)) == NULL) { + if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL) + cmderr(EX_NOUSER, "group `%s' does not exist\n", p); + } + if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) + cnf->groups[i++] = newstr(grp->gr_name); + } + while (i < cnf->numgroups) + cnf->groups[i++] = NULL; + } + if ((arg = getarg(args, 'k')) != NULL) { + if (stat(cnf->dotdir = arg->val, &st) == -1 || S_ISDIR(st.st_mode)) + cmderr(EX_OSFILE, "skeleton `%s' is not a directory or does not exist\n", cnf->dotdir); + } + if ((arg = getarg(args, 's')) != NULL) + cnf->shell_default = arg->val; + + if (mode == M_ADD && getarg(args, 'D')) { + if (getarg(args, 'n') != NULL) + cmderr(EX_DATAERR, "can't combine `-D' with `-n name'\n"); + if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { + if ((cnf->min_uid = (uid_t) atoi(p)) == 0) + cnf->min_uid = 1000; + if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) + cnf->max_uid = 32000; + } + if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { + if ((cnf->min_gid = (gid_t) atoi(p)) == 0) + cnf->min_gid = 1000; + if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) + cnf->max_gid = 32000; + } + if ((arg = getarg(args, 'w')) != NULL) + cnf->default_password = boolean_val(arg->val, cnf->default_password); + + arg = getarg(args, 'C'); + if (write_userconfig(arg ? arg->val : NULL)) + return EXIT_SUCCESS; + perror("config update"); + return EX_IOERR; + } + if (mode == M_PRINT && getarg(args, 'a')) { + int pretty = getarg(args, 'P') != NULL; + + setpwent(); + while ((pwd = getpwent()) != NULL) + print_user(pwd, pretty); + endpwent(); + return EXIT_SUCCESS; + } + if ((a_name = getarg(args, 'n')) != NULL) + pwd = getpwnam(pw_checkname((u_char *)a_name->val, 0)); + a_uid = getarg(args, 'u'); + + if (a_uid == NULL) { + if (a_name == NULL) + cmderr(EX_DATAERR, "user name or id required\n"); + + /* + * Determine whether 'n' switch is name or uid - we don't + * really don't really care which we have, but we need to + * know. + */ + if (mode != M_ADD && pwd == NULL && isdigit(*a_name->val) && atoi(a_name->val) > 0) { /* Assume uid */ + (a_uid = a_name)->ch = 'u'; + a_name = NULL; + } + } + /* + * Update, delete & print require that the user exists + */ + if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { + if (a_name == NULL && pwd == NULL) /* Try harder */ + pwd = getpwuid(atoi(a_uid->val)); + + if (pwd == NULL) { + if (mode == M_PRINT && getarg(args, 'F')) { + fakeuser.pw_name = a_name ? a_name->val : "nouser"; + fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; + return print_user(&fakeuser, getarg(args, 'P') != NULL); + } + if (a_name == NULL) + cmderr(EX_NOUSER, "no such uid `%s'\n", a_uid->val); + cmderr(EX_NOUSER, "no such user `%s'\n", a_name->val); + } + if (a_name == NULL) /* May be needed later */ + a_name = addarg(args, 'n', newstr(pwd->pw_name)); + + /* + * Handle deletions now + */ + if (mode == M_DELETE) { + char file[MAXPATHLEN]; + char home[MAXPATHLEN]; + uid_t uid = pwd->pw_uid; + + if (strcmp(pwd->pw_name, "root") == 0) + cmderr(EX_DATAERR, "cannot remove user 'root'\n"); + + /* + * Remove skey record from /etc/skeykeys + */ + + rmskey(pwd->pw_name); + + /* + * Remove crontabs + */ + sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); + if (access(file, F_OK) == 0) { + sprintf(file, "crontab -u %s -r", pwd->pw_name); + system(file); + } + /* + * Save these for later, since contents of pwd may be + * invalidated by deletion + */ + sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); + strncpy(home, pwd->pw_dir, sizeof home); + home[sizeof home - 1] = '\0'; + + if (!delpwent(pwd)) + cmderr(EX_IOERR, "Error updating passwd file: %s\n", strerror(errno)); + + if (cnf->nispasswd && *cnf->nispasswd=='/' && !delnispwent(cnf->nispasswd, a_name->val)) + perror("WARNING: NIS passwd update"); + + editgroups(a_name->val, NULL); + + pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); + + /* + * Remove mail file + */ + remove(file); + + /* + * Remove at jobs + */ + if (getpwuid(uid) == NULL) + rmat(uid); + + /* + * Remove home directory and contents + */ + if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { + if (stat(home, &st) != -1) { + rm_r(home, uid); + pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", + a_name->val, (long) uid, home, + stat(home, &st) == -1 ? "" : "not completely "); + } + } + return EXIT_SUCCESS; + } else if (mode == M_PRINT) + return print_user(pwd, getarg(args, 'P') != NULL); + + /* + * The rest is edit code + */ + if ((arg = getarg(args, 'l')) != NULL) { + if (strcmp(pwd->pw_name, "root") == 0) + cmderr(EX_DATAERR, "can't rename `root' account\n"); + pwd->pw_name = pw_checkname((u_char *)arg->val, 0); + } + if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) { + pwd->pw_uid = (uid_t) atol(arg->val); + if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) + cmderr(EX_DATAERR, "can't change uid of `root' account\n"); + if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) + fprintf(stderr, "WARNING: account `%s' will have a uid of 0 (superuser access!)\n", pwd->pw_name); + } + if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */ + pwd->pw_gid = (gid_t) getgrnam(cnf->default_group)->gr_gid; + + if ((arg = getarg(args, 'p')) != NULL) { + if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) + pwd->pw_change = 0; + else { + time_t now = time(NULL); + time_t expire = parse_date(now, arg->val); + + if (now == expire) + cmderr(EX_DATAERR, "Invalid password change date `%s'\n", arg->val); + pwd->pw_change = expire; + } + } + if ((arg = getarg(args, 'e')) != NULL) { + if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) + pwd->pw_expire = 0; + else { + time_t now = time(NULL); + time_t expire = parse_date(now, arg->val); + + if (now == expire) + cmderr(EX_DATAERR, "Invalid account expiry date `%s'\n", arg->val); + pwd->pw_expire = expire; + } + } + if ((arg = getarg(args, 's')) != NULL) + pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val); + + if (getarg(args, 'L')) + pwd->pw_class = cnf->default_class; + + if ((arg = getarg(args, 'd')) != NULL) { + if (stat(pwd->pw_dir = arg->val, &st) == -1) { + if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) + fprintf(stderr, "WARNING: home `%s' does not exist\n", pwd->pw_dir); + } else if (!S_ISDIR(st.st_mode)) + fprintf(stderr, "WARNING: home `%s' is not a directory\n", pwd->pw_dir); + } + + if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) + pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); + + } else { + if (a_name == NULL) /* Required */ + cmderr(EX_DATAERR, "login name required\n"); + else if ((pwd = getpwnam(a_name->val)) != NULL) /* Exists */ + cmderr(EX_DATAERR, "login name `%s' already exists\n", a_name->val); + + /* + * Now, set up defaults for a new user + */ + pwd = &fakeuser; + pwd->pw_name = a_name->val; + pwd->pw_class = cnf->default_class ? cnf->default_class : ""; + pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); + pwd->pw_uid = pw_uidpolicy(cnf, args); + pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); + pwd->pw_change = pw_pwdpolicy(cnf, args); + pwd->pw_expire = pw_exppolicy(cnf, args); + pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); + pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); + + if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) + fprintf(stderr, "WARNING: new account `%s' has a uid of 0 (superuser access!)\n", pwd->pw_name); + } + + /* + * Shared add/edit code + */ + if ((arg = getarg(args, 'c')) != NULL) + pwd->pw_gecos = pw_checkname((u_char *)arg->val, 1); + + if ((arg = getarg(args, 'h')) != NULL) { + if (strcmp(arg->val, "-") == 0) + pwd->pw_passwd = "*"; /* No access */ + else { + int fd = atoi(arg->val); + int b; + int istty = isatty(fd); + struct termios t; + + if (istty) { + if (tcgetattr(fd, &t) == -1) + istty = 0; + else { + struct termios n = t; + + /* Disable echo */ + n.c_lflag &= ~(ECHO); + tcsetattr(fd, TCSANOW, &n); + printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name); + fflush(stdout); + } + } + b = read(fd, line, sizeof(line) - 1); + if (istty) { /* Restore state */ + tcsetattr(fd, TCSANOW, &t); + fputc('\n', stdout); + fflush(stdout); + } + if (b < 0) { + perror("-h file descriptor"); + return EX_IOERR; + } + line[b] = '\0'; + if ((p = strpbrk(line, " \t\r\n")) != NULL) + *p = '\0'; + if (!*line) + cmderr(EX_DATAERR, "empty password read on file descriptor %d\n", fd); + pwd->pw_passwd = pw_pwcrypt(line); + } + } + + /* + * Special case: -N only displays & exits + */ + if (getarg(args, 'N') != NULL) + return print_user(pwd, getarg(args, 'P') != NULL); + + r = r1 = 1; + if (mode == M_ADD) { + r = addpwent(pwd); + if (r && cnf->nispasswd && *cnf->nispasswd=='/') + r1 = addnispwent(cnf->nispasswd, pwd); + } else if (mode == M_UPDATE) { + r = chgpwent(a_name->val, pwd); + if (r && cnf->nispasswd && *cnf->nispasswd=='/') + r1 = chgnispwent(cnf->nispasswd, a_name->val, pwd); + } + + if (!r) { + perror("password update"); + return EX_IOERR; + } else if (!r1) { + perror("WARNING: NIS password update"); + /* Keep on trucking */ + } + + /* + * Ok, user is created or changed - now edit group file + */ + + if (mode == M_ADD || getarg(args, 'G') != NULL) + editgroups(pwd->pw_name, cnf->groups); + + /* pwd may have been invalidated */ + if ((pwd = getpwnam(a_name->val)) == NULL) + cmderr(EX_NOUSER, "user '%s' disappeared during update\n", a_name->val); + + grp = getgrgid(pwd->pw_gid); + pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s", + pwd->pw_name, (long) pwd->pw_uid, + grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), + pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); + + /* + * If adding, let's touch and chown the user's mail file. This is not + * strictly necessary under BSD with a 0755 maildir but it also + * doesn't hurt anything to create the empty mailfile + */ + if (mode == M_ADD) { + FILE *fp; + + sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); + close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & + * mtime */ + chown(line, pwd->pw_uid, pwd->pw_gid); + + /* + * Send mail to the new user as well, if we are asked to + */ + if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { + FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); + + if (pfp == NULL) + perror("sendmail"); + else { + fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); + while (fgets(line, sizeof(line), fp) != NULL) { + /* Do substitutions? */ + fputs(line, pfp); + } + pclose(pfp); + pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", + pwd->pw_name, (long) pwd->pw_uid); + } + fclose(fp); + } + } + /* + * Finally, let's create and populate the user's home directory. Note + * that this also `works' for editing users if -m is used, but + * existing files will *not* be overwritten. + */ + if (getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { + copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid); + pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", + pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); + } + return EXIT_SUCCESS; +} + + +static uid_t +pw_uidpolicy(struct userconf * cnf, struct cargs * args) +{ + struct passwd *pwd; + uid_t uid = (uid_t) - 1; + struct carg *a_uid = getarg(args, 'u'); + + /* + * Check the given uid, if any + */ + if (a_uid != NULL) { + uid = (uid_t) atol(a_uid->val); + + if ((pwd = getpwuid(uid)) != NULL && getarg(args, 'o') == NULL) + cmderr(EX_DATAERR, "uid `%ld' has already been allocated\n", (long) pwd->pw_uid); + } else { + struct bitmap bm; + + /* + * We need to allocate the next available uid under one of + * two policies a) Grab the first unused uid b) Grab the + * highest possible unused uid + */ + if (cnf->min_uid >= cnf->max_uid) { /* Sanity + * claus^H^H^H^Hheck */ + cnf->min_uid = 1000; + cnf->max_uid = 32000; + } + bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); + + /* + * Now, let's fill the bitmap from the password file + */ + setpwent(); + while ((pwd = getpwent()) != NULL) + if (pwd->pw_uid >= (int) cnf->min_uid && pwd->pw_uid <= (int) cnf->max_uid) + bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); + endpwent(); + + /* + * Then apply the policy, with fallback to reuse if necessary + */ + if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) + uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); + + /* + * Another sanity check + */ + if (uid < cnf->min_uid || uid > cnf->max_uid) + cmderr(EX_SOFTWARE, "unable to allocate a new uid - range fully used\n"); + bm_dealloc(&bm); + } + return uid; +} + + +static uid_t +pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) +{ + struct group *grp; + gid_t gid = (uid_t) - 1; + struct carg *a_gid = getarg(args, 'g'); + + /* + * If no arg given, see if default can help out + */ + if (a_gid == NULL && cnf->default_group && *cnf->default_group) + a_gid = addarg(args, 'g', cnf->default_group); + + /* + * Check the given gid, if any + */ + setgrent(); + if (a_gid != NULL) { + if ((grp = getgrnam(a_gid->val)) == NULL) { + gid = (gid_t) atol(a_gid->val); + if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = getgrgid(gid)) == NULL) + cmderr(EX_NOUSER, "group `%s' is not defined\n", a_gid->val); + } + gid = grp->gr_gid; + } else if ((grp = getgrnam(nam)) != NULL && grp->gr_mem[0] == NULL) { + gid = grp->gr_gid; /* Already created? Use it anyway... */ + } else { + struct cargs grpargs; + char tmp[32]; + + LIST_INIT(&grpargs); + addarg(&grpargs, 'n', nam); + + /* + * We need to auto-create a group with the user's name. We + * can send all the appropriate output to our sister routine + * bit first see if we can create a group with gid==uid so we + * can keep the user and group ids in sync. We purposely do + * NOT check the gid range if we can force the sync. If the + * user's name dups an existing group, then the group add + * function will happily handle that case for us and exit. + */ + if (getgrgid(prefer) == NULL) { + sprintf(tmp, "%lu", (unsigned long) prefer); + addarg(&grpargs, 'g', tmp); + } + if (getarg(args, 'N')) + { + addarg(&grpargs, 'N', NULL); + addarg(&grpargs, 'q', NULL); + gid = pw_group(cnf, M_NEXT, &grpargs); + } + else + { + pw_group(cnf, M_ADD, &grpargs); + if ((grp = getgrnam(nam)) != NULL) + gid = grp->gr_gid; + } + a_gid = grpargs.lh_first; + while (a_gid != NULL) { + struct carg *t = a_gid->list.le_next; + LIST_REMOVE(a_gid, list); + a_gid = t; + } + } + endgrent(); + return gid; +} + + +static time_t +pw_pwdpolicy(struct userconf * cnf, struct cargs * args) +{ + time_t result = 0; + time_t now = time(NULL); + struct carg *arg = getarg(args, 'e'); + + if (arg != NULL) { + if ((result = parse_date(now, arg->val)) == now) + cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val); + } else if (cnf->password_days > 0) + result = now + ((long) cnf->password_days * 86400L); + return result; +} + + +static time_t +pw_exppolicy(struct userconf * cnf, struct cargs * args) +{ + time_t result = 0; + time_t now = time(NULL); + struct carg *arg = getarg(args, 'e'); + + if (arg != NULL) { + if ((result = parse_date(now, arg->val)) == now) + cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val); + } else if (cnf->expire_days > 0) + result = now + ((long) cnf->expire_days * 86400L); + return result; +} + + +static char * +pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) +{ + struct carg *arg = getarg(args, 'd'); + + if (arg) + return arg->val; + else { + static char home[128]; + + if (cnf->home == NULL || *cnf->home == '\0') + cmderr(EX_CONFIG, "no base home directory set\n"); + sprintf(home, "%s/%s", cnf->home, user); + return home; + } +} + +static char * +shell_path(char const * path, char *shells[], char *sh) +{ + if (sh != NULL && (*sh == '/' || *sh == '\0')) + return sh; /* specified full path or forced none */ + else { + char *p; + char paths[_UC_MAXLINE]; + + /* + * We need to search paths + */ + strncpy(paths, path, sizeof paths); + paths[sizeof paths - 1] = '\0'; + for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { + int i; + static char shellpath[256]; + + if (sh != NULL) { + sprintf(shellpath, "%s/%s", p, sh); + if (access(shellpath, X_OK) == 0) + return shellpath; + } else + for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { + sprintf(shellpath, "%s/%s", p, shells[i]); + if (access(shellpath, X_OK) == 0) + return shellpath; + } + } + if (sh == NULL) + cmderr(EX_OSFILE, "can't find shell `%s' in shell paths\n", sh); + cmderr(EX_CONFIG, "no default shell available or defined\n"); + return NULL; + } +} + + +static char * +pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) +{ + char *sh = newshell; + struct carg *arg = getarg(args, 's'); + + if (newshell == NULL && arg != NULL) + sh = arg->val; + return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); +} + +static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."; + +char * +pw_pwcrypt(char *password) +{ + int i; + char salt[12]; + + static char buf[256]; + + /* + * Calculate a salt value + */ + srandom((unsigned) (time(NULL) ^ getpid())); + for (i = 0; i < 8; i++) + salt[i] = chars[random() % 63]; + salt[i] = '\0'; + + return strcpy(buf, crypt(password, salt)); +} + +#if defined(__FreeBSD__) + +#if defined(USE_MD5RAND) +u_char * +pw_getrand(u_char *buf, int len) /* cryptographically secure rng */ +{ + int i; + for (i=0;i<len;i+=16) { + u_char ubuf[16]; + + MD5_CTX md5_ctx; + struct timeval tv, tvo; + struct rusage ru; + int n=0; + int t; + + MD5Init (&md5_ctx); + t=getpid(); + MD5Update (&md5_ctx, (u_char*)&t, sizeof t); + t=getppid(); + MD5Update (&md5_ctx, (u_char*)&t, sizeof t); + gettimeofday (&tvo, NULL); + do { + getrusage (RUSAGE_SELF, &ru); + MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru); + gettimeofday (&tv, NULL); + MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv); + } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000); + MD5Final (ubuf, &md5_ctx); + memcpy(buf+i, ubuf, MIN(16, len-n)); + } + return buf; +} + +#else /* Use random device (preferred) */ + +static u_char * +pw_getrand(u_char *buf, int len) +{ + int fd; + fd = open("/dev/urandom", O_RDONLY); + if (fd==-1) + cmderr(EX_OSFILE, "can't open /dev/urandom: %s\n", strerror(errno)); + else if (read(fd, buf, len)!=len) + cmderr(EX_IOERR, "read error on /dev/urandom\n"); + close(fd); + return buf; +} + +#endif + +#else /* Portable version */ + +static u_char * +pw_getrand(u_char *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) { + unsigned val = random(); + /* Use all bits in the random value */ + buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val); + } + return buf; +} + +#endif + +static char * +pw_password(struct userconf * cnf, struct cargs * args, char const * user) +{ + int i, l; + char pwbuf[32]; + u_char rndbuf[sizeof pwbuf]; + + switch (cnf->default_password) { + case -1: /* Random password */ + srandom((unsigned) (time(NULL) ^ getpid())); + l = (random() % 8 + 8); /* 8 - 16 chars */ + pw_getrand(rndbuf, l); + for (i = 0; i < l; i++) + pwbuf[i] = chars[rndbuf[i] % sizeof(chars)]; + pwbuf[i] = '\0'; + + /* + * We give this information back to the user + */ + if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) { + if (isatty(1)) + printf("Password for '%s' is: ", user); + printf("%s\n", pwbuf); + fflush(stdout); + } + break; + + case -2: /* No password at all! */ + return ""; + + case 0: /* No login - default */ + default: + return "*"; + + case 1: /* user's name */ + strncpy(pwbuf, user, sizeof pwbuf); + pwbuf[sizeof pwbuf - 1] = '\0'; + break; + } + return pw_pwcrypt(pwbuf); +} + + +static int +print_user(struct passwd * pwd, int pretty) +{ + if (!pretty) { + char buf[_UC_MAXLINE]; + + fmtpwent(buf, pwd); + fputs(buf, stdout); + } else { + int j; + char *p; + struct group *grp = getgrgid(pwd->pw_gid); + char uname[60] = "User &", office[60] = "[None]", + wphone[60] = "[None]", hphone[60] = "[None]"; + char acexpire[32] = "[None]", pwexpire[32] = "[None]"; + struct tm * tptr; + + if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { + strncpy(uname, p, sizeof uname); + uname[sizeof uname - 1] = '\0'; + if ((p = strtok(NULL, ",")) != NULL) { + strncpy(office, p, sizeof office); + office[sizeof office - 1] = '\0'; + if ((p = strtok(NULL, ",")) != NULL) { + strncpy(wphone, p, sizeof wphone); + wphone[sizeof wphone - 1] = '\0'; + if ((p = strtok(NULL, "")) != NULL) { + strncpy(hphone, p, sizeof hphone); + hphone[sizeof hphone - 1] = '\0'; + } + } + } + } + /* + * Handle '&' in gecos field + */ + if ((p = strchr(uname, '&')) != NULL) { + int l = strlen(pwd->pw_name); + int m = strlen(p); + + memmove(p + l, p + 1, m); + memmove(p, pwd->pw_name, l); + *p = (char) toupper(*p); + } + if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) + strftime(acexpire, sizeof acexpire, "%c", tptr); + if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL) + strftime(pwexpire, sizeof pwexpire, "%c", tptr); + printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" + " Full Name: %s\n" + " Home: %-26.26s Class: %s\n" + " Shell: %-26.26s Office: %s\n" + "Work Phone: %-26.26s Home Phone: %s\n" + "Acc Expire: %-26.26s Pwd Expire: %s\n", + pwd->pw_name, (long) pwd->pw_uid, + grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, + uname, pwd->pw_dir, pwd->pw_class, + pwd->pw_shell, office, wphone, hphone, + acexpire, pwexpire); + setgrent(); + j = 0; + while ((grp=getgrent()) != NULL) + { + int i = 0; + while (grp->gr_mem[i] != NULL) + { + if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) + { + printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); + break; + } + ++i; + } + } + endgrent(); + printf("%s\n", j ? "\n" : ""); + } + return EXIT_SUCCESS; +} + +char * +pw_checkname(u_char *name, int gecos) +{ + int l = 0; + char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\""; + + while (name[l]) { + if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 || + (!gecos && l==0 && name[l] == '-') || /* leading '-' */ + (!gecos && name[l] & 0x80)) /* 8-bit */ + cmderr(EX_DATAERR, (name[l] >= ' ' && name[l] < 127) + ? "invalid character `%c' in field\n" + : "invalid character 0x%02x in field\n", + name[l]); + ++l; + } + if (!gecos && l > LOGNAMESIZE) + cmderr(EX_DATAERR, "name too long `%s'\n", name); + return (char *)name; +} + + +static void +rmat(uid_t uid) +{ + DIR *d = opendir("/var/at/jobs"); + + if (d != NULL) { + struct dirent *e; + + while ((e = readdir(d)) != NULL) { + struct stat st; + + if (strncmp(e->d_name, ".lock", 5) != 0 && + stat(e->d_name, &st) == 0 && + !S_ISDIR(st.st_mode) && + st.st_uid == uid) { + char tmp[MAXPATHLEN]; + + sprintf(tmp, "/usr/bin/atrm %s", e->d_name); + system(tmp); + } + } + closedir(d); + } +} + +static void +rmskey(char const * name) +{ + static const char etcskey[] = "/etc/skeykeys"; + FILE *fp = fopen(etcskey, "r+"); + + if (fp != NULL) { + char tmp[1024]; + off_t atofs = 0; + int length = strlen(name); + + while (fgets(tmp, sizeof tmp, fp) != NULL) { + if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { + if (fseek(fp, atofs, SEEK_SET) == 0) { + fwrite("#", 1, 1, fp); /* Comment username out */ + } + break; + } + atofs = ftell(fp); + } + /* + * If we got an error of any sort, don't update! + */ + fclose(fp); + } +} + |