diff options
Diffstat (limited to 'usr.bin/passwd/krb_passwd.c')
| -rw-r--r-- | usr.bin/passwd/krb_passwd.c | 442 |
1 files changed, 156 insertions, 286 deletions
diff --git a/usr.bin/passwd/krb_passwd.c b/usr.bin/passwd/krb_passwd.c index 6a5afaac089..3b19b58fa01 100644 --- a/usr.bin/passwd/krb_passwd.c +++ b/usr.bin/passwd/krb_passwd.c @@ -1,43 +1,30 @@ -/* $OpenBSD: krb_passwd.c,v 1.7 1997/06/29 11:10:33 provos Exp $ */ - -/*- - * Copyright (c) 1990 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. +/* $KTH: kpasswd.c,v 1.25 1997/05/02 14:28:51 assar Exp $ */ + +/* + Copyright (C) 1989 by the Massachusetts Institute of Technology + + Export of this software from the United States of America is assumed + to require a specific license from the United States Government. + It is the responsibility of any person or organization contemplating + export to obtain such a license before exporting. + +WITHIN THAT CONSTRAINT, permission to use, copy, modify, and +distribute this software and its documentation for any purpose and +without fee is hereby granted, provided that the above copyright +notice appear in all copies and that both that copyright notice and +this permission notice appear in supporting documentation, and that +the name of M.I.T. not be used in advertising or publicity pertaining +to distribution of the software without specific, written prior +permission. M.I.T. makes no representations about the suitability of +this software for any purpose. It is provided "as is" without express +or implied warranty. + + */ + +/* + * change your password with kerberos */ -#ifndef lint -/*static char sccsid[] = "from: @(#)krb_passwd.c 5.4 (Berkeley) 3/1/91";*/ -static char rcsid[] = "$OpenBSD: krb_passwd.c,v 1.7 1997/06/29 11:10:33 provos Exp $"; -#endif /* not lint */ - #ifdef KERBEROS #include <sys/types.h> @@ -47,268 +34,151 @@ static char rcsid[] = "$OpenBSD: krb_passwd.c,v 1.7 1997/06/29 11:10:33 provos E #include <netinet/in.h> #include <des.h> #include <kerberosIV/krb.h> +#include <kerberosIV/kadm.h> +#include <kerberosIV/kadm_err.h> #include <netdb.h> #include <signal.h> #include <pwd.h> #include <err.h> #include <errno.h> #include <stdio.h> -#include "kpasswd_proto.h" #include <string.h> #include <stdlib.h> #include <unistd.h> -#define PROTO "tcp" - -static struct timeval timeout = { CLIENT_KRB_TIMEOUT, 0 }; -static struct kpasswd_data proto_data; -static des_cblock okey; -static Key_schedule osched; -KTEXT_ST ticket; -Key_schedule random_schedule; -long authopts; -char realm[REALM_SZ], krbhst[MAX_HSTNM]; -int sock; - -krb_passwd() -{ - struct servent *se; - struct hostent *host; - struct sockaddr_in sin; - CREDENTIALS cred; - int fdsn; - fd_set *fdsp; - int rval; - char pass[_PASSWORD_LEN], password[_PASSWORD_LEN]; - static void finish(); - - static struct rlimit rl = { 0, 0 }; - - (void)signal(SIGHUP, SIG_IGN); - (void)signal(SIGINT, SIG_IGN); - (void)signal(SIGTSTP, SIG_IGN); - - if (setrlimit(RLIMIT_CORE, &rl) < 0) { - warn("setrlimit"); - return(1); - } - - if ((se = getservbyname(SERVICE, PROTO)) == NULL) { - warnx("couldn't find entry for service %s/%s", SERVICE, PROTO); - return(1); - } - - if ((rval = krb_get_lrealm(realm,1)) != KSUCCESS) { - warnx("couldn't get local Kerberos realm: %s", krb_err_txt[rval]); - return(1); - } - - if ((rval = krb_get_krbhst(krbhst, realm, 1)) != KSUCCESS) { - warnx("couldn't get Kerberos host: %s", krb_err_txt[rval]); - return(1); - } - - if ((host = gethostbyname(krbhst)) == NULL) { - warnx("couldn't get host entry for krb host %s", krbhst); - return(1); - } - - sin.sin_family = host->h_addrtype; - bcopy(host->h_addr, (char *) &sin.sin_addr, host->h_length); - sin.sin_port = se->s_port; - - if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) { - warn("socket"); - return(1); - } - - if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) < 0) { - warn("connect"); - (void)close(sock); - return(1); - } - - rval = krb_sendauth( - authopts, /* NOT mutual */ - sock, - &ticket, /* (filled in) */ - SERVICE, - krbhst, /* instance (krbhst) */ - realm, /* dest realm */ - (u_long) getpid(), /* checksum */ - NULL, /* msg data */ - NULL, /* credentials */ - NULL, /* schedule */ - NULL, /* local addr */ - NULL, /* foreign addr */ - "KPWDV0.1" - ); - - if (rval != KSUCCESS) { - warnx("Kerberos sendauth error: %s", krb_err_txt[rval]); - return(1); - } - - krb_get_cred("krbtgt", realm, realm, &cred); +char realm[REALM_SZ]; - (void)printf("Changing Kerberos password for %s.%s@%s.\n", - cred.pname, cred.pinst, realm); - - if (des_read_pw_string(pass, - sizeof(pass)-1, "Old Kerberos password:", 0)) { - warnx("error reading old Kerberos password"); - return(1); - } - - (void)des_string_to_key(pass, &okey); - (void)des_key_sched(&okey, osched); - (void)desrw_set_key(&okey, osched); - - /* wait on the verification string */ - - fdsn = howmany(sock+1, NFDBITS) * sizeof(fd_mask); - if ((fdsp = (fd_set *)malloc(fdsn)) == NULL) - err(1, "malloc"); - memset(fdsp, 0, fdsn); - FD_SET(sock, fdsp); - - rval = - select(sock + 1, fdsp, (fd_set *) 0, (fd_set *) 0, &timeout); - - if ((rval < 1) || !FD_ISSET(sock, fdsp)) { - free(fdsp); - if(rval == 0) { - warnx("timed out (aborted)"); - cleanup(); - return(1); - } - warnx("select failed (aborted)"); - cleanup(); - return(1); - } - free(fdsp); - - /* read verification string */ - - if (des_read(sock, &proto_data, sizeof(proto_data)) != - sizeof(proto_data)) { - warnx("couldn't read verification string (aborted)"); - cleanup(); - return(1); - } - - (void)signal(SIGHUP, finish); - (void)signal(SIGINT, finish); - - if (strcmp(SECURE_STRING, proto_data.secure_msg) != 0) { - cleanup(); - /* don't complain loud if user just hit return */ - if (pass == NULL || (!*pass)) - return(0); - warnx("Sorry"); - return(1); - } - - (void)des_key_sched(&proto_data.random_key, random_schedule); - (void)desrw_set_key(&proto_data.random_key, random_schedule); - (void)bzero(pass, sizeof(pass)); - - if (des_read_pw_string(pass, - sizeof(pass)-1, "New Kerberos password:", 0)) { - warnx("error reading new Kerberos password (aborted)"); - cleanup(); - return(1); - } - - if (des_read_pw_string(password, - sizeof(password)-1, "Retype new Kerberos password:", 0)) { - warnx("error reading new Kerberos password (aborted)"); - cleanup(); - return(1); - } - - if (strcmp(password, pass) != 0) { - warnx("password mismatch (aborted)"); - cleanup(); - return(1); - } - - if (strlen(pass) == 0) - (void)printf("using NULL password\n"); - - send_update(sock, password, SECURE_STRING); - - /* wait for ACK */ - - fdsn = howmany(sock+1, NFDBITS) * sizeof(fd_mask); - if ((fdsp = (fd_set *)malloc(fdsn)) == NULL) - err(1, "malloc"); - memset(fdsp, 0, fdsn); - FD_SET(sock, fdsp); - - rval = - select(sock + 1, fdsp, (fd_set *) 0, (fd_set *) 0, &timeout); - if ((rval < 1) || !FD_ISSET(sock, fdsp)) { - free(fdsp); - if(rval == 0) { - warnx("timed out reading ACK (aborted)"); - cleanup(); - exit(1); - } - warnx("select failed (aborted)"); - cleanup(); - exit(1); - } - free(fdsp); - recv_ack(sock); - cleanup(); - exit(0); -} - -send_update(dest, pwd, str) - int dest; - char *pwd, *str; -{ - static struct update_data ud; - - (void)strncpy(ud.secure_msg, str, _PASSWORD_LEN); - (void)strncpy(ud.pw, pwd, sizeof(ud.pw)); - if (des_write(dest, &ud, sizeof(ud)) != sizeof(ud)) { - warnx("couldn't write pw update (abort)"); - bzero((char *)&ud, sizeof(ud)); - cleanup(); - exit(1); - } -} - -recv_ack(remote) - int remote; -{ - int cc; - char buf[BUFSIZ]; - - cc = des_read(remote, buf, sizeof(buf)); - if (cc <= 0) { - warnx("error reading acknowledgement (aborted)"); - cleanup(); - exit(1); - } - (void)printf("%s", buf); -} - -cleanup() -{ - (void)bzero((char *)&proto_data, sizeof(proto_data)); - (void)bzero((char *)okey, sizeof(okey)); - (void)bzero((char *)osched, sizeof(osched)); - (void)bzero((char *)random_schedule, sizeof(random_schedule)); -} +extern void usage(int value); -static void -finish() +int +krb_passwd(int argc, char **argv) { - (void)close(sock); + krb_principal principal; + krb_principal default_principal; + int realm_given = 0; /* True if realm was give on cmdline */ + int use_default = 1; /* True if we should use default name */ + int status; /* return code */ + char pword[MAX_KPW_LEN]; + int c; + char tktstring[MAXPATHLEN]; + + memset (&principal, 0, sizeof(principal)); + memset (&default_principal, 0, sizeof(default_principal)); + + krb_get_default_principal (default_principal.name, + default_principal.instance, + default_principal.realm); + + while ((c = getopt(argc, argv, "u:n:i:r:h")) != EOF) { + switch (c) { + case 'u': + status = krb_parse_name (optarg, &principal); + if (status != KSUCCESS) + errx (2, "%s", krb_get_err_text(status)); + if (principal.realm[0]) + realm_given++; + else if (krb_get_lrealm(principal.realm, 1) != KSUCCESS) + errx (1, "Could not find default realm!"); + break; + case 'n': + if (k_isname(optarg)) + strncpy(principal.name, optarg, sizeof(principal.name) - 1); + else { + warnx("Bad name: %s", optarg); + usage(1); + } + break; + case 'i': + if (k_isinst(optarg)) + strncpy(principal.instance, + optarg, + sizeof(principal.instance) - 1); + else { + warnx("Bad instance: %s", optarg); + usage(1); + } + break; + case 'r': + if (k_isrealm(optarg)) { + strncpy(principal.realm, optarg, sizeof(principal.realm) - 1); + realm_given++; + } else { + warnx("Bad realm: %s", optarg); + usage(1); + } + break; + case 'h': + usage(0); + break; + default: + usage(1); + break; + } + use_default = 0; + } + if (optind < argc) { + use_default = 0; + status = krb_parse_name (argv[optind], &principal); + if(status != KSUCCESS) + errx (1, "%s", krb_get_err_text (status)); + } + + if (use_default) { + strncpy(principal.name, default_principal.name, ANAME_SZ - 1); + principal.name[ANAME_SZ - 1] = '\0'; + strncpy(principal.instance, default_principal.instance, INST_SZ - 1); + principal.instance[INST_SZ - 1] = '\0'; + strncpy(principal.realm, default_principal.realm, REALM_SZ - 1); + principal.realm[REALM_SZ - 1] = '\0'; + } else { + if (!principal.name[0]) { + strncpy(principal.name, default_principal.name, ANAME_SZ - 1); + principal.name[ANAME_SZ - 1] = '\0'; + } + if (!principal.realm[0]) { + strncpy(principal.realm, default_principal.realm, REALM_SZ - 1); + principal.realm[REALM_SZ - 1] = '\0'; + } + } + + snprintf(tktstring, sizeof(tktstring), + TKT_ROOT "_cpw_%u", (unsigned)getpid()); + krb_set_tkt_string(tktstring); + + if (get_pw_new_pwd(pword, sizeof(pword), &principal, + realm_given)) { + dest_tkt (); exit(1); + } + + status = kadm_init_link (PWSERV_NAME, KRB_MASTER, principal.realm); + if (status != KADM_SUCCESS) + com_err(argv[0], status, "while initializing"); + else { + des_cblock newkey; + char *pw_msg; /* message from server */ + + des_string_to_key(pword, &newkey); + status = kadm_change_pw_plain((unsigned char*)&newkey, pword, &pw_msg); + memset(newkey, 0, sizeof(newkey)); + + if (status == KADM_INSECURE_PW) + warnx ("Insecure password: %s", pw_msg); + else if (status != KADM_SUCCESS) + com_err(argv[0], status, " attempting to change password."); + } + memset(pword, 0, sizeof(pword)); + + if (status != KADM_SUCCESS) + fprintf(stderr,"Password NOT changed.\n"); + else + printf("Password changed.\n"); + + dest_tkt(); + if (status) + return 2; + else + return 0; } #endif /* KERBEROS */ |