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Password-changing program with Kerberos support via the `kadmin'

Browse source 
protocol.  Replaces passwd(1) when eBones is installed.  As before, HOW-TO
explains the gory details.
This commit is contained in:
Garrett Wollman 1995-01-20 22:14:14 +00:00
parent 01ae44681d
commit 788c8e2ea4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5754
4 changed files with 716 additions and 0 deletions
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247
eBones/passwd/HOW-TO Normal file
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Here's how to regenerate this from the original eBones:
1) Copy kpasswd.c from the admin directory.
2) perl -spi.bak -e 's/\$(Header[^\$]*)\$/$1/g' *.[ch]
3) Apply the following patch:
*** /home/wollman/kpasswd.orig/kpasswd.c Fri Jan 20 16:01:36 1995
--- kpasswd.c Fri Jan 20 16:29:57 1995
***************
*** 1,10 ****
/*
- * $Source: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/kpasswd.c,v $
- * $Author: jtkohl $
- *
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
! * <mit-copyright.h>.
*
* change your password with kerberos
--- 1,7 ----
/*
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
! * Copyright.MIT.
*
* change your password with kerberos
***************
*** 12,20 ****
#ifndef lint
static char rcsid_kpasswd_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/kpasswd.c,v 4.3 89/09/26 09:33:02 jtkohl Exp ";
#endif lint
- #include <mit-copyright.h>
/*
* kpasswd
--- 9,20 ----
#ifndef lint
+ #if 0
static char rcsid_kpasswd_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/kpasswd.c,v 4.3 89/09/26 09:33:02 jtkohl Exp ";
+ #endif
+ static const char rcsid[] =
+ "$Id$";
#endif lint
/*
* kpasswd
***************
*** 28,36 ****
#include "kadm.h"
extern void krb_set_tkt_string();
! main(argc,argv)
! int argc;
! char *argv[];
{
char name[ANAME_SZ]; /* name of user */
--- 28,38 ----
#include "kadm.h"
+ #include "extern.h"
+
extern void krb_set_tkt_string();
+ static void go_home(char *, int);
!
! int krb_passwd(char *uname, char *iflag, char *rflag, char *uflag)
{
char name[ANAME_SZ]; /* name of user */
***************
*** 66,74 ****
default_realm) != KSUCCESS) {
pw = getpwuid((int) getuid());
! if (pw)
! (void) strcpy(default_name, pw->pw_name);
! else
/* seems like a null name is kinda silly */
! (void) strcpy(default_name, "");
strcpy(default_inst, "");
if (krb_get_lrealm(default_realm, 1) != KSUCCESS)
--- 68,77 ----
default_realm) != KSUCCESS) {
pw = getpwuid((int) getuid());
! if (pw) {
! strcpy(default_name, pw->pw_name);
! } else {
/* seems like a null name is kinda silly */
! strcpy(default_name, "");
! }
strcpy(default_inst, "");
if (krb_get_lrealm(default_realm, 1) != KSUCCESS)
***************
*** 76,85 ****
}
! while ((c = getopt(argc, argv, "u:n:i:r:h")) != EOF) {
! switch (c) {
! case 'u':
! if (status = kname_parse(name, inst, realm, optarg)) {
! fprintf(stderr, "Kerberos error: %s\n", krb_err_txt[status]);
! exit(2);
}
if (realm[0])
--- 79,85 ----
}
! if(uflag) {
! if (status = kname_parse(name, inst, realm, uflag)) {
! errx(2, "Kerberos error: %s", krb_err_txt[status]);
}
if (realm[0])
***************
*** 88,130 ****
if (krb_get_lrealm(realm, 1) != KSUCCESS)
strcpy(realm, KRB_REALM);
! break;
! case 'n':
! if (k_isname(optarg))
! (void) strncpy(name, optarg, sizeof(name) - 1);
! else {
! fprintf(stderr, "Bad name: %s\n", optarg);
! usage(1);
! }
! break;
! case 'i':
! if (k_isinst(optarg))
! (void) strncpy(inst, optarg, sizeof(inst) - 1);
! else {
! fprintf(stderr, "Bad instance: %s\n", optarg);
! usage(1);
}
! (void) strcpy(inst, optarg);
! break;
! case 'r':
! if (k_isrealm(optarg)) {
! (void) strncpy(realm, optarg, sizeof(realm) - 1);
! realm_given++;
}
! else {
! fprintf(stderr, "Bad realm: %s\n", optarg);
! usage(1);
}
- break;
- case 'h':
- usage(0);
- break;
- default:
- usage(1);
- break;
- }
- use_default = 0;
}
! if (optind < argc)
! usage(1);
if (use_default) {
--- 88,119 ----
if (krb_get_lrealm(realm, 1) != KSUCCESS)
strcpy(realm, KRB_REALM);
! }
!
! if(uname) {
! if (k_isname(uname)) {
! strncpy(name, uname, sizeof(name) - 1);
! } else {
! errx(1, "bad name: %s", uname);
}
! }
!
! if(iflag) {
! if (k_isinst(iflag)) {
! strncpy(inst, iflag, sizeof(inst) - 1);
! } else {
! errx(1, "bad instance: %s", iflag);
}
! }
!
! if(rflag) {
! if (k_isrealm(rflag)) {
! strncpy(realm, rflag, sizeof(realm) - 1);
! realm_given++;
! } else {
! errx(1, "bad realm: %s", rflag);
}
}
!
! if(uname || iflag || rflag || uflag) use_default = 0;
if (use_default) {
***************
*** 132,137 ****
strcpy(inst, default_inst);
strcpy(realm, default_realm);
! }
! else {
if (!name[0])
strcpy(name, default_name);
--- 121,125 ----
strcpy(inst, default_inst);
strcpy(realm, default_realm);
! } else {
if (!name[0])
strcpy(name, default_name);
***************
*** 147,153 ****
if ((status = kadm_init_link("changepw", KRB_MASTER, realm))
!= KADM_SUCCESS)
! com_err(argv[0], status, "while initializing");
else if ((status = kadm_change_pw(new_key)) != KADM_SUCCESS)
! com_err(argv[0], status, " attempting to change password.");
if (status != KADM_SUCCESS)
--- 135,141 ----
if ((status = kadm_init_link("changepw", KRB_MASTER, realm))
!= KADM_SUCCESS)
! com_err("kpasswd", status, "while initializing");
else if ((status = kadm_change_pw(new_key)) != KADM_SUCCESS)
! com_err("kpasswd", status, " attempting to change password.");
if (status != KADM_SUCCESS)
***************
*** 225,237 ****
}
! usage(value)
! int value;
! {
! fprintf(stderr, "Usage: ");
! fprintf(stderr, "kpasswd [-h ] [-n user] [-i instance] [-r realm] ");
! fprintf(stderr, "[-u fullname]\n");
! exit(value);
! }
!
go_home(str,x)
char *str;
--- 213,217 ----
}
! static void
go_home(str,x)
char *str;

23
eBones/passwd/Makefile Normal file
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# $Id$
PROG= passwd
BINDIR= /usr/bin
SRCS= local_passwd.c passwd.c pw_copy.c pw_util.c kpasswd.c
.PATH: ${.CURDIR}/../../usr.bin/chpass ${.CURDIR}/../../usr.sbin/vipw \
${.CURDIR}/../../usr.bin/rlogin ${.CURDIR}/../../usr.bin/passwd
CFLAGS+= -DKERBEROS -DPOSIX \
-I${.CURDIR} -I${.CURDIR}/../../usr.sbin/vipw \
-I${.CURDIR}/../../usr.bin/chpass \
-I${.CURDIR}/../../usr.bin/passwd \
-I${.CURDIR}/../include \
-I${.CURDIR}/../libkadm
LDADD= -L${KADMOBJDIR} -lkadm -L${KRBOBJDIR} -lkrb -L${DESOBJDIR} -ldes \
-lcrypt -lcom_err
BINOWN= root
BINMODE=4555
INSTALLFLAGS= -fschg
NOMAN= #man page installed by regular passwd
.include <bsd.prog.mk>

223
eBones/passwd/kpasswd.c Normal file
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/*
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* Copyright.MIT.
*
* change your password with kerberos
*/
#ifndef lint
#if 0
static char rcsid_kpasswd_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/kpasswd.c,v 4.3 89/09/26 09:33:02 jtkohl Exp ";
#endif
static const char rcsid[] =
"$Id$";
#endif lint
/*
* kpasswd
* change your password with kerberos
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <pwd.h>
#include "kadm.h"
#include "extern.h"
extern void krb_set_tkt_string();
static void go_home(char *, int);
int krb_passwd(char *uname, char *iflag, char *rflag, char *uflag)
{
char name[ANAME_SZ]; /* name of user */
char inst[INST_SZ]; /* instance of user */
char realm[REALM_SZ]; /* realm of user */
char default_name[ANAME_SZ];
char default_inst[INST_SZ];
char default_realm[REALM_SZ];
int realm_given = 0; /* True if realm was give on cmdline */
int use_default = 1; /* True if we should use default name */
struct passwd *pw;
int status; /* return code */
des_cblock new_key;
int c;
extern char *optarg;
extern int optind;
char tktstring[MAXPATHLEN];
void get_pw_new_key();
#ifdef NOENCRYPTION
#define read_long_pw_string placebo_read_pw_string
#else
#define read_long_pw_string des_read_pw_string
#endif
int read_long_pw_string();
bzero(name, sizeof(name));
bzero(inst, sizeof(inst));
bzero(realm, sizeof(realm));
if (krb_get_tf_fullname(TKT_FILE, default_name, default_inst,
default_realm) != KSUCCESS) {
pw = getpwuid((int) getuid());
if (pw) {
strcpy(default_name, pw->pw_name);
} else {
/* seems like a null name is kinda silly */
strcpy(default_name, "");
}
strcpy(default_inst, "");
if (krb_get_lrealm(default_realm, 1) != KSUCCESS)
strcpy(default_realm, KRB_REALM);
}
if(uflag) {
if (status = kname_parse(name, inst, realm, uflag)) {
errx(2, "Kerberos error: %s", krb_err_txt[status]);
}
if (realm[0])
realm_given++;
else
if (krb_get_lrealm(realm, 1) != KSUCCESS)
strcpy(realm, KRB_REALM);
}
if(uname) {
if (k_isname(uname)) {
strncpy(name, uname, sizeof(name) - 1);
} else {
errx(1, "bad name: %s", uname);
}
}
if(iflag) {
if (k_isinst(iflag)) {
strncpy(inst, iflag, sizeof(inst) - 1);
} else {
errx(1, "bad instance: %s", iflag);
}
}
if(rflag) {
if (k_isrealm(rflag)) {
strncpy(realm, rflag, sizeof(realm) - 1);
realm_given++;
} else {
errx(1, "bad realm: %s", rflag);
}
}
if(uname || iflag || rflag || uflag) use_default = 0;
if (use_default) {
strcpy(name, default_name);
strcpy(inst, default_inst);
strcpy(realm, default_realm);
} else {
if (!name[0])
strcpy(name, default_name);
if (!realm[0])
strcpy(realm, default_realm);
}
(void) sprintf(tktstring, "/tmp/tkt_cpw_%d",getpid());
krb_set_tkt_string(tktstring);
get_pw_new_key(new_key, name, inst, realm, realm_given);
if ((status = kadm_init_link("changepw", KRB_MASTER, realm))
!= KADM_SUCCESS)
com_err("kpasswd", status, "while initializing");
else if ((status = kadm_change_pw(new_key)) != KADM_SUCCESS)
com_err("kpasswd", status, " attempting to change password.");
if (status != KADM_SUCCESS)
fprintf(stderr,"Password NOT changed.\n");
else
printf("Password changed.\n");
(void) dest_tkt();
if (status)
exit(2);
else
exit(0);
}
void get_pw_new_key(new_key, name, inst, realm, print_realm)
des_cblock new_key;
char *name;
char *inst;
char *realm;
int print_realm; /* True if realm was give on cmdline */
{
char ppromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char pword[MAX_KPW_LEN]; /* storage for the password */
char npromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char local_realm[REALM_SZ];
int status;
/*
* We don't care about failure; this is to determine whether or
* not to print the realm in the prompt for a new password.
*/
(void) krb_get_lrealm(local_realm, 1);
if (strcmp(local_realm, realm))
print_realm++;
(void) sprintf(ppromp,"Old password for %s%s%s%s%s:",
name, *inst ? "." : "", inst,
print_realm ? "@" : "", print_realm ? realm : "");
if (read_long_pw_string(pword, sizeof(pword)-1, ppromp, 0)) {
fprintf(stderr, "Error reading old password.\n");
exit(1);
}
if ((status = krb_get_pw_in_tkt(name, inst, realm, PWSERV_NAME,
KADM_SINST, 1, pword)) != KSUCCESS) {
if (status == INTK_BADPW) {
printf("Incorrect old password.\n");
exit(0);
}
else {
fprintf(stderr, "Kerberos error: %s\n", krb_err_txt[status]);
exit(1);
}
}
bzero(pword, sizeof(pword));
do {
(void) sprintf(npromp,"New Password for %s%s%s%s%s:",
name, *inst ? "." : "", inst,
print_realm ? "@" : "", print_realm ? realm : "");
if (read_long_pw_string(pword, sizeof(pword)-1, npromp, 1))
go_home("Error reading new password, password unchanged.\n",0);
if (strlen(pword) == 0)
printf("Null passwords are not allowed; try again.\n");
} while (strlen(pword) == 0);
#ifdef NOENCRYPTION
bzero((char *) new_key, sizeof(des_cblock));
new_key[0] = (unsigned char) 1;
#else
(void) des_string_to_key(pword, new_key);
#endif
bzero(pword, sizeof(pword));
}
static void
go_home(str,x)
char *str;
int x;
{
fprintf(stderr, str, x);
(void) dest_tkt();
exit(1);
}

223
eBones/usr.bin/passwd/kpasswd.c Normal file
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/*
* Copyright 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* Copyright.MIT.
*
* change your password with kerberos
*/
#ifndef lint
#if 0
static char rcsid_kpasswd_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/kpasswd.c,v 4.3 89/09/26 09:33:02 jtkohl Exp ";
#endif
static const char rcsid[] =
"$Id$";
#endif lint
/*
* kpasswd
* change your password with kerberos
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <pwd.h>
#include "kadm.h"
#include "extern.h"
extern void krb_set_tkt_string();
static void go_home(char *, int);
int krb_passwd(char *uname, char *iflag, char *rflag, char *uflag)
{
char name[ANAME_SZ]; /* name of user */
char inst[INST_SZ]; /* instance of user */
char realm[REALM_SZ]; /* realm of user */
char default_name[ANAME_SZ];
char default_inst[INST_SZ];
char default_realm[REALM_SZ];
int realm_given = 0; /* True if realm was give on cmdline */
int use_default = 1; /* True if we should use default name */
struct passwd *pw;
int status; /* return code */
des_cblock new_key;
int c;
extern char *optarg;
extern int optind;
char tktstring[MAXPATHLEN];
void get_pw_new_key();
#ifdef NOENCRYPTION
#define read_long_pw_string placebo_read_pw_string
#else
#define read_long_pw_string des_read_pw_string
#endif
int read_long_pw_string();
bzero(name, sizeof(name));
bzero(inst, sizeof(inst));
bzero(realm, sizeof(realm));
if (krb_get_tf_fullname(TKT_FILE, default_name, default_inst,
default_realm) != KSUCCESS) {
pw = getpwuid((int) getuid());
if (pw) {
strcpy(default_name, pw->pw_name);
} else {
/* seems like a null name is kinda silly */
strcpy(default_name, "");
}
strcpy(default_inst, "");
if (krb_get_lrealm(default_realm, 1) != KSUCCESS)
strcpy(default_realm, KRB_REALM);
}
if(uflag) {
if (status = kname_parse(name, inst, realm, uflag)) {
errx(2, "Kerberos error: %s", krb_err_txt[status]);
}
if (realm[0])
realm_given++;
else
if (krb_get_lrealm(realm, 1) != KSUCCESS)
strcpy(realm, KRB_REALM);
}
if(uname) {
if (k_isname(uname)) {
strncpy(name, uname, sizeof(name) - 1);
} else {
errx(1, "bad name: %s", uname);
}
}
if(iflag) {
if (k_isinst(iflag)) {
strncpy(inst, iflag, sizeof(inst) - 1);
} else {
errx(1, "bad instance: %s", iflag);
}
}
if(rflag) {
if (k_isrealm(rflag)) {
strncpy(realm, rflag, sizeof(realm) - 1);
realm_given++;
} else {
errx(1, "bad realm: %s", rflag);
}
}
if(uname || iflag || rflag || uflag) use_default = 0;
if (use_default) {
strcpy(name, default_name);
strcpy(inst, default_inst);
strcpy(realm, default_realm);
} else {
if (!name[0])
strcpy(name, default_name);
if (!realm[0])
strcpy(realm, default_realm);
}
(void) sprintf(tktstring, "/tmp/tkt_cpw_%d",getpid());
krb_set_tkt_string(tktstring);
get_pw_new_key(new_key, name, inst, realm, realm_given);
if ((status = kadm_init_link("changepw", KRB_MASTER, realm))
!= KADM_SUCCESS)
com_err("kpasswd", status, "while initializing");
else if ((status = kadm_change_pw(new_key)) != KADM_SUCCESS)
com_err("kpasswd", status, " attempting to change password.");
if (status != KADM_SUCCESS)
fprintf(stderr,"Password NOT changed.\n");
else
printf("Password changed.\n");
(void) dest_tkt();
if (status)
exit(2);
else
exit(0);
}
void get_pw_new_key(new_key, name, inst, realm, print_realm)
des_cblock new_key;
char *name;
char *inst;
char *realm;
int print_realm; /* True if realm was give on cmdline */
{
char ppromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char pword[MAX_KPW_LEN]; /* storage for the password */
char npromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char local_realm[REALM_SZ];
int status;
/*
* We don't care about failure; this is to determine whether or
* not to print the realm in the prompt for a new password.
*/
(void) krb_get_lrealm(local_realm, 1);
if (strcmp(local_realm, realm))
print_realm++;
(void) sprintf(ppromp,"Old password for %s%s%s%s%s:",
name, *inst ? "." : "", inst,
print_realm ? "@" : "", print_realm ? realm : "");
if (read_long_pw_string(pword, sizeof(pword)-1, ppromp, 0)) {
fprintf(stderr, "Error reading old password.\n");
exit(1);
}
if ((status = krb_get_pw_in_tkt(name, inst, realm, PWSERV_NAME,
KADM_SINST, 1, pword)) != KSUCCESS) {
if (status == INTK_BADPW) {
printf("Incorrect old password.\n");
exit(0);
}
else {
fprintf(stderr, "Kerberos error: %s\n", krb_err_txt[status]);
exit(1);
}
}
bzero(pword, sizeof(pword));
do {
(void) sprintf(npromp,"New Password for %s%s%s%s%s:",
name, *inst ? "." : "", inst,
print_realm ? "@" : "", print_realm ? realm : "");
if (read_long_pw_string(pword, sizeof(pword)-1, npromp, 1))
go_home("Error reading new password, password unchanged.\n",0);
if (strlen(pword) == 0)
printf("Null passwords are not allowed; try again.\n");
} while (strlen(pword) == 0);
#ifdef NOENCRYPTION
bzero((char *) new_key, sizeof(des_cblock));
new_key[0] = (unsigned char) 1;
#else
(void) des_string_to_key(pword, new_key);
#endif
bzero(pword, sizeof(pword));
}
static void
go_home(str,x)
char *str;
int x;
{
fprintf(stderr, str, x);
(void) dest_tkt();
exit(1);
}