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Diffstat (limited to 'usr.bin/passwd/yp_passwd.c')
| -rw-r--r-- | usr.bin/passwd/yp_passwd.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/usr.bin/passwd/yp_passwd.c b/usr.bin/passwd/yp_passwd.c new file mode 100644 index 000000000000..01cac298223a --- /dev/null +++ b/usr.bin/passwd/yp_passwd.c @@ -0,0 +1,290 @@ +/* + * Copyright (c) 1988 The Regents of the University of California. + * 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. + * 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. + */ +#ifndef lint +/*static char sccsid[] = "from: @(#)yp_passwd.c 1.0 2/2/93";*/ +static char rcsid[] = "$Id: yp_passwd.c,v 1.1 1994/01/11 19:01:16 nate Exp $"; +#endif /* not lint */ + +#ifdef YP + +#include <stdio.h> +#include <string.h> +#include <netdb.h> +#include <time.h> +#include <pwd.h> +#include <errno.h> +#include <rpc/rpc.h> +#include <rpcsvc/yp_prot.h> +#include <rpcsvc/ypclnt.h> +#define passwd yp_passwd_rec +#include <rpcsvc/yppasswd.h> +#undef passwd + +#ifndef _PASSWORD_LEN +#define _PASSWORD_LEN PASS_MAX +#endif + +extern char *progname; +static char *getnewpasswd(); +static struct passwd *ypgetpwnam(); + +static uid_t uid; +char *domain; + +yp_passwd(uname) + char *uname; +{ + char *master; + char *pp; + int r, rpcport, status; + struct yppasswd yppasswd; + struct passwd *pw; + struct timeval tv; + CLIENT *client; + + uid = getuid(); + + /* + * Get local domain + */ + if (r = yp_get_default_domain(&domain)) { + (void)fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n", progname, yperr_string(r)); + exit(1); + } + + /* + * Find the host for the passwd map; it should be running + * the daemon. + */ + if ((r = yp_master(domain, "passwd.byname", &master)) != 0) { + (void)fprintf(stderr, "%s: can't find the master YP server. Reason: %s\n", progname, yperr_string(r)); + exit(1); + } + + /* + * Ask the portmapper for the port of the daemon. + */ + if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE, IPPROTO_UDP)) == 0) { + (void)fprintf(stderr, "%s: master YP server not running yppasswd daemon.\n\tCan't change password.\n", progname); + exit(1); + } + + /* + * Be sure the port is priviledged + */ + if (rpcport >= IPPORT_RESERVED) { + (void)fprintf(stderr, "%s: yppasswd daemon running on an invalid port.\n", progname); + exit(1); + } + + /* Get user's login identity */ + if (!(pw = ypgetpwnam(uname))) { + (void)fprintf(stderr, "%s: unknown user %s.\n", progname, uname); + exit(1); + } + + if (uid && uid != pw->pw_uid) { + (void)fprintf(stderr, "%s: you are only allowed to change your own password: %s\n", progname, strerror(EACCES)); + exit(1); + } + + /* prompt for new password */ + yppasswd.newpw.pw_passwd = getnewpasswd(pw, &yppasswd.oldpass); + + /* tell rpc.yppasswdd */ + yppasswd.newpw.pw_name = pw->pw_name; + yppasswd.newpw.pw_uid = pw->pw_uid; + yppasswd.newpw.pw_gid = pw->pw_gid; + yppasswd.newpw.pw_gecos = pw->pw_gecos; + yppasswd.newpw.pw_dir = pw->pw_dir; + yppasswd.newpw.pw_shell = pw->pw_shell; + + client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp"); + if (client==NULL) { + fprintf(stderr, "can't contact yppasswdd on %s: Reason: %s\n", + master, yperr_string(YPERR_YPBIND)); + return(YPERR_YPBIND); + } + client->cl_auth = authunix_create_default(); + tv.tv_sec = 2; + tv.tv_usec = 0; + r = clnt_call(client, YPPASSWDPROC_UPDATE, + xdr_yppasswd, &yppasswd, xdr_int, &status, tv); + if (r) + fprintf(stderr, "%s: rpc to yppasswdd failed.\n"); + else if (status) + printf("Couldn't change YP password.\n"); + else + printf("The YP password has been changed on %s, the master YP passwd server.\n", master); + + exit(0); +} + +static char * +getnewpasswd(pw, old_pass) + register struct passwd *pw; + char **old_pass; +{ + static char buf[_PASSWORD_LEN+1]; + register char *p, *t; + int tries; + char salt[9], *crypt(), *getpass(); + + (void)printf("Changing YP password for %s.\n", pw->pw_name); + + if (uid && old_pass) { + *old_pass = NULL; + + if (pw->pw_passwd && +#ifdef DES + strcmp(crypt(p = getpass("Old password:"), pw->pw_passwd), + pw->pw_passwd)) { +#else + strcmp(p = getpass("Old password:"), pw->pw_passwd)) { +#endif + errno = EACCES; + pw_error(NULL, 1, 1); + } + *old_pass = strdup(p); + } + for (buf[0] = '\0', tries = 0;;) { + p = getpass("New password:"); + if (!*p) { + (void)printf("Password unchanged.\n"); + pw_error(NULL, 0, 0); + } + if (strlen(p) <= 5 && (uid != 0 || ++tries < 2)) { + (void)printf("Please enter a longer password.\n"); + continue; + } + for (t = p; *t && islower(*t); ++t); + if (!*t && (uid != 0 || ++tries < 2)) { + (void)printf("Please don't use an all-lower case password.\nUnusual capitalization, control characters or digits are suggested.\n"); + continue; + } + (void)strcpy(buf, p); + if (!strcmp(buf, getpass("Retype new password:"))) + break; + (void)printf("Mismatch; try again, EOF to quit.\n"); + } + /* grab a random printable character that isn't a colon */ + (void)srandom((int)time((time_t *)NULL)); +#ifdef NEWSALT + salt[0] = _PASSWORD_EFMT1; + to64(&salt[1], (long)(29 * 25), 4); + to64(&salt[5], random(), 4); +#else + to64(&salt[0], random(), 2); +#endif +#ifdef DES + return(strdup(crypt(buf, salt))); +#else + return(buf); +#endif +} + +static char * +pwskip(register char *p) +{ + while (*p && *p != ':' && *p != '\n') + ++p; + if (*p) + *p++ = 0; + return (p); +} + +struct passwd * +interpret(struct passwd *pwent, char *line) +{ + register char *p = line; + register int c; + + pwent->pw_passwd = "*"; + pwent->pw_uid = 0; + pwent->pw_gid = 0; + pwent->pw_gecos = ""; + pwent->pw_dir = ""; + pwent->pw_shell = ""; + pwent->pw_change = 0; + pwent->pw_expire = 0; + pwent->pw_class = ""; + + /* line without colon separators is no good, so ignore it */ + if(!strchr(p,':')) + return(NULL); + + pwent->pw_name = p; + p = pwskip(p); + pwent->pw_passwd = p; + p = pwskip(p); + pwent->pw_uid = (uid_t)strtoul(p, NULL, 10); + p = pwskip(p); + pwent->pw_gid = (gid_t)strtoul(p, NULL, 10); + p = pwskip(p); + pwent->pw_gecos = p; + p = pwskip(p); + pwent->pw_dir = p; + p = pwskip(p); + pwent->pw_shell = p; + while (*p && *p != '\n') + p++; + *p = '\0'; + return (pwent); +} + +static struct passwd * +ypgetpwnam(nam) + char *nam; +{ + static struct passwd pwent; + static char line[1024]; + char *val; + int reason, vallen; + + reason = yp_match(domain, "passwd.byname", nam, strlen(nam), + &val, &vallen); + switch(reason) { + case 0: + break; + default: + return (NULL); + break; + } + val[vallen] = '\0'; + strcpy(line, val); + free(val); + + return(interpret(&pwent, line)); +} + +#endif /* YP */ |