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Add last piece in fully-functional Kerberos implementation: ksrvutil,

Browse Source 
a program to manage /etc/srvtab.
This commit is contained in:
Garrett Wollman 1995-01-20 22:38:30 +00:00
parent 218a5dcf33
commit 8c5c9f2577
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5756
5 changed files with 1471 additions and 0 deletions
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291
eBones/ksrvutil/HOW-TO Normal file
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@ -0,0 +1,291 @@
To re-create this export-controlled program from eBones:
1) Copy ksrvutil.c from the kadmin directory.
2) perl -spi.bak -e 's/\$(Header[^\$]*)\$/$1/g' *.[ch]
3) Apply this patch:
*** ksrvutil.c.orig Fri Jan 20 17:19:45 1995
--- ksrvutil.c Fri Jan 20 17:27:38 1995
***************
*** 1,10 ****
/*
- * $Source: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/ksrvutil.c,v $
- * $Author: jtkohl $
- *
* Copyright 1989 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
! * <mit-copyright.h>.
*
* list and update contents of srvtab files
--- 1,7 ----
/*
* Copyright 1989 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
! * Copyright.MIT.
*
* list and update contents of srvtab files
***************
*** 12,20 ****
#ifndef lint
static char rcsid_ksrvutil_c[] =
! "BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/ksrvutil.c,v 4.1 89/09/26 09:33:49 jtkohl Exp ";
#endif lint
- #include <mit-copyright.h>
/*
* ksrvutil
--- 9,20 ----
#ifndef lint
+ #if 0
static char rcsid_ksrvutil_c[] =
! "BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/ksrvutil.c,v 4.1 89/09/26 09:33:49 jtkohl Exp ";
! #endif
! static const char rcsid[] =
! "$Id$";
#endif lint
/*
* ksrvutil
***************
*** 37,40 ****
--- 37,41 ----
#include <errno.h>
#include <kadm.h>
+ #include <err.h>
#ifdef NOENCRYPTION
***************
*** 54,58 ****
extern int errno;
- extern char *sys_errlist[];
extern void krb_set_tkt_string();
--- 55,58 ----
***************
*** 79,85 ****
if ((keyfile_fd = open(keyfile, O_RDONLY, 0)) < 0) {
if (errno != ENOENT) {
! (void)fprintf(stderr, "%s: Unable to read %s: %s\n", progname,
! keyfile, sys_errlist[errno]);
! exit(1);
}
else {
--- 79,83 ----
if ((keyfile_fd = open(keyfile, O_RDONLY, 0)) < 0) {
if (errno != ENOENT) {
! err(1, "unable to read %s", keyfile);
}
else {
***************
*** 88,100 ****
open(keyfile,
O_WRONLY | O_TRUNC | O_CREAT, SRVTAB_MODE)) < 0) {
! (void) fprintf(stderr, "%s: Unable to create %s: %s\n",
! progname, keyfile, sys_errlist[errno]);
! exit(1);
}
else
if (close(keyfile_fd) < 0) {
! (void) fprintf(stderr, "%s: Failure closing %s: %s\n",
! progname, keyfile, sys_errlist[errno]);
! exit(1);
}
}
--- 86,94 ----
open(keyfile,
O_WRONLY | O_TRUNC | O_CREAT, SRVTAB_MODE)) < 0) {
! err(1, "unable to create %s", keyfile);
}
else
if (close(keyfile_fd) < 0) {
! err(1, "failure closing %s", keyfile);
}
}
***************
*** 107,135 ****
open(backup_keyfile, O_WRONLY | O_TRUNC | O_CREAT,
keyfile_mode)) < 0) {
! (void) fprintf(stderr, "%s: Unable to write %s: %s\n", progname,
! backup_keyfile, sys_errlist[errno]);
! exit(1);
}
do {
if ((rcount = read(keyfile_fd, (char *)buf, sizeof(buf))) < 0) {
! (void) fprintf(stderr, "%s: Error reading %s: %s\n", progname,
! keyfile, sys_errlist[errno]);
! exit(1);
}
if (rcount && (write(backup_keyfile_fd, buf, rcount) != rcount)) {
! (void) fprintf(stderr, "%s: Error writing %s: %s\n", progname,
! backup_keyfile, sys_errlist[errno]);
! exit(1);
}
} while (rcount);
if (close(backup_keyfile_fd) < 0) {
! (void) fprintf(stderr, "%s: Error closing %s: %s\n", progname,
! backup_keyfile, sys_errlist[errno]);
! exit(1);
}
if (close(keyfile_fd) < 0) {
! (void) fprintf(stderr, "%s: Error closing %s: %s\n", progname,
! keyfile, sys_errlist[errno]);
! exit(1);
}
}
--- 101,119 ----
open(backup_keyfile, O_WRONLY | O_TRUNC | O_CREAT,
keyfile_mode)) < 0) {
! err(1, "unable to write %s", backup_keyfile);
}
do {
if ((rcount = read(keyfile_fd, (char *)buf, sizeof(buf))) < 0) {
! err(1, "error reading %s", keyfile);
}
if (rcount && (write(backup_keyfile_fd, buf, rcount) != rcount)) {
! err(1, "error writing %s", backup_keyfile);
}
} while (rcount);
if (close(backup_keyfile_fd) < 0) {
! err(1, "error closing %s", backup_keyfile);
}
if (close(keyfile_fd) < 0) {
! err(1, "error closing %s", keyfile);
}
}
***************
*** 145,151 ****
(void) bzero(buf, size);
if (read(0, buf, size - 1) < 0) {
! (void) fprintf(stderr, "Failure reading from stdin: %s\n",
! sys_errlist[errno]);
! leave((char *)NULL, 1);
}
fflush(stdin);
--- 129,134 ----
(void) bzero(buf, size);
if (read(0, buf, size - 1) < 0) {
! warn("failure reading from stdin");
! leave((char *)NULL, 1);
}
fflush(stdin);
***************
*** 163,170 ****
{
if (write(fd, buf, len) != len) {
! (void) fprintf(stderr, "%s: Failure writing to %s: %s\n", progname,
! filename, sys_errlist[errno]);
! (void) close(fd);
! leave("In progress srvtab in this file.", 1);
}
}
--- 146,152 ----
{
if (write(fd, buf, len) != len) {
! warn("failure writing %s", filename);
! close(fd);
! leave("In progress srvtab in this file.", 1);
}
}
***************
*** 343,349 ****
if (change || list) {
if ((backup_keyfile_fd = open(backup_keyfile, O_RDONLY, 0)) < 0) {
! (void) fprintf(stderr, "%s: Unable to read %s: %s\n", argv[0],
! backup_keyfile, sys_errlist[errno]);
! exit(1);
}
}
--- 325,329 ----
if (change || list) {
if ((backup_keyfile_fd = open(backup_keyfile, O_RDONLY, 0)) < 0) {
! err(1, "unable to read %s", backup_keyfile);
}
}
***************
*** 353,359 ****
open(work_keyfile, O_WRONLY | O_CREAT | O_TRUNC,
SRVTAB_MODE)) < 0) {
! (void) fprintf(stderr, "%s: Unable to write %s: %s\n", argv[0],
! work_keyfile, sys_errlist[errno]);
! exit(1);
}
}
--- 333,337 ----
open(work_keyfile, O_WRONLY | O_CREAT | O_TRUNC,
SRVTAB_MODE)) < 0) {
! err(1, "unable to write %s", work_keyfile);
}
}
***************
*** 361,367 ****
if ((work_keyfile_fd =
open(work_keyfile, O_APPEND | O_WRONLY, SRVTAB_MODE)) < 0) {
! (void) fprintf(stderr, "%s: Unable to open %s for append: %s\n",
! argv[0], work_keyfile, sys_errlist[errno]);
! exit(1);
}
}
--- 339,343 ----
if ((work_keyfile_fd =
open(work_keyfile, O_APPEND | O_WRONLY, SRVTAB_MODE)) < 0) {
! err(1, "unable to append to %s", work_keyfile);
}
}
***************
*** 456,463 ****
}
else {
! (void)fprintf(stderr,
! "%s: Unable to revert keyfile: %s\n",
! argv[0], sys_errlist[errno]);
! leave("", 1);
}
}
--- 432,437 ----
}
else {
! warn("unable to revert keyfile");
! leave("", 1);
}
}
***************
*** 499,518 ****
if (change || list)
if (close(backup_keyfile_fd) < 0) {
! (void) fprintf(stderr, "%s: Failure closing %s: %s\n",
! argv[0], backup_keyfile, sys_errlist[errno]);
! (void) fprintf(stderr, "continuing...\n");
}
if (change || add) {
if (close(work_keyfile_fd) < 0) {
! (void) fprintf(stderr, "%s: Failure closing %s: %s\n",
! argv[0], work_keyfile, sys_errlist[errno]);
! exit(1);
}
if (rename(work_keyfile, keyfile) < 0) {
! (void) fprintf(stderr, "%s: Failure renaming %s to %s: %s\n",
! argv[0], work_keyfile, keyfile,
! sys_errlist[errno]);
! exit(1);
}
(void) chmod(backup_keyfile, keyfile_mode);
--- 473,485 ----
if (change || list)
if (close(backup_keyfile_fd) < 0) {
! warn("failure closing %s, continuing", backup_keyfile);
}
if (change || add) {
if (close(work_keyfile_fd) < 0) {
! err(1, "failure closing %s", work_keyfile);
}
if (rename(work_keyfile, keyfile) < 0) {
! err(1, "failure renaming %s to %s", work_keyfile, keyfile);
}
(void) chmod(backup_keyfile, keyfile_mode);

10
eBones/ksrvutil/Makefile Normal file
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@ -0,0 +1,10 @@
# $Id$
PROG= ksrvutil
SRCS= ksrvutil.c
CFLAGS+= -I${.CURDIR}/../include -I${.CURDIR}/../libkadm
LDADD+= -L${KADMOBJDIR} -lkadm -L${KRBOBJDIR} -lkrb -L${DESOBJDIR} -ldes \
-lcom_err
NOMAN= #man page installed by ../man
.include <bsd.prog.mk>

580
eBones/ksrvutil/ksrvutil.c Normal file
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@ -0,0 +1,580 @@
/*
* Copyright 1989 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* Copyright.MIT.
*
* list and update contents of srvtab files
*/
#ifndef lint
#if 0
static char rcsid_ksrvutil_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/ksrvutil.c,v 4.1 89/09/26 09:33:49 jtkohl Exp ";
#endif
static const char rcsid[] =
"$Id$";
#endif lint
/*
* ksrvutil
* list and update the contents of srvtab files
*/
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#include <sys/types.h>
#include <sys/file.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#include <kadm.h>
#include <err.h>
#ifdef NOENCRYPTION
#define read_long_pw_string placebo_read_pw_string
#else /* NOENCRYPTION */
#define read_long_pw_string des_read_pw_string
#endif /* NOENCRYPTION */
int read_long_pw_string();
#define SRVTAB_MODE 0600 /* rw------- */
#define PAD " "
#define VNO_HEADER "Version"
#define VNO_FORMAT "%4d "
#define KEY_HEADER " Key " /* 17 characters long */
#define PRINC_HEADER " Principal\n"
#define PRINC_FORMAT "%s"
extern int errno;
extern void krb_set_tkt_string();
void leave();
unsigned short get_mode();
void
copy_keyfile(progname, keyfile, backup_keyfile)
char *progname;
char *keyfile;
char *backup_keyfile;
{
int keyfile_fd;
int backup_keyfile_fd;
int keyfile_mode;
char buf[BUFSIZ]; /* for copying keyfiles */
int rcount; /* for copying keyfiles */
int try_again;
(void) bzero((char *)buf, sizeof(buf));
do {
try_again = FALSE;
if ((keyfile_fd = open(keyfile, O_RDONLY, 0)) < 0) {
if (errno != ENOENT) {
err(1, "unable to read %s", keyfile);
}
else {
try_again = TRUE;
if ((keyfile_fd =
open(keyfile,
O_WRONLY | O_TRUNC | O_CREAT, SRVTAB_MODE)) < 0) {
err(1, "unable to create %s", keyfile);
}
else
if (close(keyfile_fd) < 0) {
err(1, "failure closing %s", keyfile);
}
}
}
} while(try_again);
keyfile_mode = get_mode(keyfile);
if ((backup_keyfile_fd =
open(backup_keyfile, O_WRONLY | O_TRUNC | O_CREAT,
keyfile_mode)) < 0) {
err(1, "unable to write %s", backup_keyfile);
}
do {
if ((rcount = read(keyfile_fd, (char *)buf, sizeof(buf))) < 0) {
err(1, "error reading %s", keyfile);
}
if (rcount && (write(backup_keyfile_fd, buf, rcount) != rcount)) {
err(1, "error writing %s", backup_keyfile);
}
} while (rcount);
if (close(backup_keyfile_fd) < 0) {
err(1, "error closing %s", backup_keyfile);
}
if (close(keyfile_fd) < 0) {
err(1, "error closing %s", keyfile);
}
}
void
safe_read_stdin(prompt, buf, size)
char *prompt;
char *buf;
int size;
{
(void) printf(prompt);
(void) fflush(stdout);
(void) bzero(buf, size);
if (read(0, buf, size - 1) < 0) {
warn("failure reading from stdin");
leave((char *)NULL, 1);
}
fflush(stdin);
buf[strlen(buf)-1] = 0;
}
void
safe_write(progname, filename, fd, buf, len)
char *progname;
char *filename;
int fd;
char *buf;
int len;
{
if (write(fd, buf, len) != len) {
warn("failure writing %s", filename);
close(fd);
leave("In progress srvtab in this file.", 1);
}
}
int
yn(string)
char *string;
{
char ynbuf[5];
(void) printf("%s (y,n) [y] ", string);
for (;;) {
safe_read_stdin("", ynbuf, sizeof(ynbuf));
if ((ynbuf[0] == 'n') || (ynbuf[0] == 'N'))
return(0);
else if ((ynbuf[0] == 'y') || (ynbuf[0] == 'Y') || (ynbuf[0] == 0))
return(1);
else {
(void) printf("Please enter 'y' or 'n': ");
fflush(stdout);
}
}
}
void
append_srvtab(progname, filename, fd, sname, sinst,
srealm, key_vno, key)
char *progname;
char *filename;
int fd;
char *sname;
char *sinst;
char *srealm;
unsigned char key_vno;
des_cblock key;
{
/* Add one to append null */
safe_write(progname, filename, fd, sname, strlen(sname) + 1);
safe_write(progname, filename, fd, sinst, strlen(sinst) + 1);
safe_write(progname, filename, fd, srealm, strlen(srealm) + 1);
safe_write(progname, filename, fd, (char *)&key_vno, 1);
safe_write(progname, filename, fd, (char *)key, sizeof(des_cblock));
(void) fsync(fd);
}
unsigned short
get_mode(filename)
char *filename;
{
struct stat statbuf;
unsigned short mode;
(void) bzero((char *)&statbuf, sizeof(statbuf));
if (stat(filename, &statbuf) < 0)
mode = SRVTAB_MODE;
else
mode = statbuf.st_mode;
return(mode);
}
main(argc,argv)
int argc;
char *argv[];
{
char sname[ANAME_SZ]; /* name of service */
char sinst[INST_SZ]; /* instance of service */
char srealm[REALM_SZ]; /* realm of service */
unsigned char key_vno; /* key version number */
int status; /* general purpose error status */
des_cblock new_key;
des_cblock old_key;
char change_tkt[MAXPATHLEN]; /* Ticket to use for key change */
char keyfile[MAXPATHLEN]; /* Original keyfile */
char work_keyfile[MAXPATHLEN]; /* Working copy of keyfile */
char backup_keyfile[MAXPATHLEN]; /* Backup copy of keyfile */
unsigned short keyfile_mode; /* Protections on keyfile */
int work_keyfile_fd = -1; /* Initialize so that */
int backup_keyfile_fd = -1; /* compiler doesn't complain */
char local_realm[REALM_SZ]; /* local kerberos realm */
int i;
int interactive = FALSE;
int list = FALSE;
int change = FALSE;
int add = FALSE;
int key = FALSE; /* do we show keys? */
int arg_entered = FALSE;
int change_this_key = FALSE;
char databuf[BUFSIZ];
int first_printed = FALSE; /* have we printed the first item? */
int get_svc_new_key();
void get_key_from_password();
void print_key();
void print_name();
(void) bzero((char *)sname, sizeof(sname));
(void) bzero((char *)sinst, sizeof(sinst));
(void) bzero((char *)srealm, sizeof(srealm));
(void) bzero((char *)change_tkt, sizeof(change_tkt));
(void) bzero((char *)keyfile, sizeof(keyfile));
(void) bzero((char *)work_keyfile, sizeof(work_keyfile));
(void) bzero((char *)backup_keyfile, sizeof(backup_keyfile));
(void) bzero((char *)local_realm, sizeof(local_realm));
(void) sprintf(change_tkt, "/tmp/tkt_ksrvutil.%d", getpid());
krb_set_tkt_string(change_tkt);
/* This is used only as a default for adding keys */
if (krb_get_lrealm(local_realm, 1) != KSUCCESS)
(void) strcpy(local_realm, KRB_REALM);
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-i") == 0)
interactive++;
else if (strcmp(argv[i], "-k") == 0)
key++;
else if (strcmp(argv[i], "list") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
list++;
}
}
else if (strcmp(argv[i], "change") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
change++;
}
}
else if (strcmp(argv[i], "add") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
add++;
}
}
else if (strcmp(argv[i], "-f") == 0) {
if (++i == argc)
usage();
else
(void) strcpy(keyfile, argv[i]);
}
else
usage();
}
if (!arg_entered)
usage();
if (!keyfile[0])
(void) strcpy(keyfile, KEYFILE);
(void) strcpy(work_keyfile, keyfile);
(void) strcpy(backup_keyfile, keyfile);
if (change || add) {
(void) strcat(work_keyfile, ".work");
(void) strcat(backup_keyfile, ".old");
copy_keyfile(argv[0], keyfile, backup_keyfile);
}
if (add)
copy_keyfile(argv[0], backup_keyfile, work_keyfile);
keyfile_mode = get_mode(keyfile);
if (change || list) {
if ((backup_keyfile_fd = open(backup_keyfile, O_RDONLY, 0)) < 0) {
err(1, "unable to read %s", backup_keyfile);
}
}
if (change) {
if ((work_keyfile_fd =
open(work_keyfile, O_WRONLY | O_CREAT | O_TRUNC,
SRVTAB_MODE)) < 0) {
err(1, "unable to write %s", work_keyfile);
}
}
else if (add) {
if ((work_keyfile_fd =
open(work_keyfile, O_APPEND | O_WRONLY, SRVTAB_MODE)) < 0) {
err(1, "unable to append to %s", work_keyfile);
}
}
if (change || list) {
while ((getst(backup_keyfile_fd, sname, SNAME_SZ) > 0) &&
(getst(backup_keyfile_fd, sinst, INST_SZ) > 0) &&
(getst(backup_keyfile_fd, srealm, REALM_SZ) > 0) &&
(read(backup_keyfile_fd, &key_vno, 1) > 0) &&
(read(backup_keyfile_fd,(char *)old_key,sizeof(old_key)) > 0)) {
if (list) {
if (!first_printed) {
(void) printf(VNO_HEADER);
(void) printf(PAD);
if (key) {
(void) printf(KEY_HEADER);
(void) printf(PAD);
}
(void) printf(PRINC_HEADER);
first_printed = 1;
}
(void) printf(VNO_FORMAT, key_vno);
(void) printf(PAD);
if (key) {
print_key(old_key);
(void) printf(PAD);
}
print_name(sname, sinst, srealm);
(void) printf("\n");
}
else if (change) {
(void) printf("\nPrincipal: ");
print_name(sname, sinst, srealm);
(void) printf("; version %d\n", key_vno);
if (interactive)
change_this_key = yn("Change this key?");
else if (change)
change_this_key = 1;
else
change_this_key = 0;
if (change_this_key)
(void) printf("Changing to version %d.\n", key_vno + 1);
else if (change)
(void) printf("Not changing this key.\n");
if (change_this_key) {
/*
* Pick a new key and determine whether or not
* it is safe to change
*/
if ((status =
get_svc_new_key(new_key, sname, sinst,
srealm, keyfile)) == KADM_SUCCESS)
key_vno++;
else {
(void) bcopy(old_key, new_key, sizeof(new_key));
(void) fprintf(stderr, "%s: Key NOT changed: %s\n",
argv[0], krb_err_txt[status]);
change_this_key = FALSE;
}
}
else
(void) bcopy(old_key, new_key, sizeof(new_key));
append_srvtab(argv[0], work_keyfile, work_keyfile_fd,
sname, sinst, srealm, key_vno, new_key);
if (key && change_this_key) {
(void) printf("Old key: ");
print_key(old_key);
(void) printf("; new key: ");
print_key(new_key);
(void) printf("\n");
}
if (change_this_key) {
if ((status = kadm_change_pw(new_key)) == KADM_SUCCESS) {
(void) printf("Key changed.\n");
(void) dest_tkt();
}
else {
com_err(argv[0], status,
" attempting to change password.");
(void) dest_tkt();
/* XXX This knows the format of a keyfile */
if (lseek(work_keyfile_fd, -9, L_INCR) >= 0) {
key_vno--;
safe_write(argv[0], work_keyfile,
work_keyfile_fd, (char *)&key_vno, 1);
safe_write(argv[0], work_keyfile, work_keyfile_fd,
(char *)old_key, sizeof(des_cblock));
(void) fsync(work_keyfile_fd);
(void) fprintf(stderr,"Key NOT changed.\n");
}
else {
warn("unable to revert keyfile");
leave("", 1);
}
}
}
}
bzero((char *)old_key, sizeof(des_cblock));
bzero((char *)new_key, sizeof(des_cblock));
}
}
else if (add) {
do {
do {
safe_read_stdin("Name: ", databuf, sizeof(databuf));
(void) strncpy(sname, databuf, sizeof(sname) - 1);
safe_read_stdin("Instance: ", databuf, sizeof(databuf));
(void) strncpy(sinst, databuf, sizeof(sinst) - 1);
safe_read_stdin("Realm: ", databuf, sizeof(databuf));
(void) strncpy(srealm, databuf, sizeof(srealm) - 1);
safe_read_stdin("Version number: ", databuf, sizeof(databuf));
key_vno = atoi(databuf);
if (!srealm[0])
(void) strcpy(srealm, local_realm);
(void) printf("New principal: ");
print_name(sname, sinst, srealm);
(void) printf("; version %d\n", key_vno);
} while (!yn("Is this correct?"));
get_key_from_password(new_key);
if (key) {
(void) printf("Key: ");
print_key(new_key);
(void) printf("\n");
}
append_srvtab(argv[0], work_keyfile, work_keyfile_fd,
sname, sinst, srealm, key_vno, new_key);
(void) printf("Key successfully added.\n");
} while (yn("Would you like to add another key?"));
}
if (change || list)
if (close(backup_keyfile_fd) < 0) {
warn("failure closing %s, continuing", backup_keyfile);
}
if (change || add) {
if (close(work_keyfile_fd) < 0) {
err(1, "failure closing %s", work_keyfile);
}
if (rename(work_keyfile, keyfile) < 0) {
err(1, "failure renaming %s to %s", work_keyfile, keyfile);
}
(void) chmod(backup_keyfile, keyfile_mode);
(void) chmod(keyfile, keyfile_mode);
(void) printf("Old keyfile in %s.\n", backup_keyfile);
}
exit(0);
}
void
print_key(key)
des_cblock key;
{
int i;
for (i = 0; i < 4; i++)
(void) printf("%02x", key[i]);
(void) printf(" ");
for (i = 4; i < 8; i++)
(void) printf("%02x", key[i]);
}
void
print_name(name, inst, realm)
char *name;
char *inst;
char *realm;
{
(void) printf("%s%s%s%s%s", name, inst[0] ? "." : "", inst,
realm[0] ? "@" : "", realm);
}
int
get_svc_new_key(new_key, sname, sinst, srealm, keyfile)
des_cblock new_key;
char *sname;
char *sinst;
char *srealm;
char *keyfile;
{
int status = KADM_SUCCESS;
if (((status = krb_get_svc_in_tkt(sname, sinst, srealm, PWSERV_NAME,
KADM_SINST, 1, keyfile)) == KSUCCESS) &&
((status = kadm_init_link("changepw", KRB_MASTER, srealm)) ==
KADM_SUCCESS)) {
#ifdef NOENCRYPTION
(void) bzero((char *) new_key, sizeof(des_cblock));
new_key[0] = (unsigned char) 1;
#else /* NOENCRYPTION */
(void) des_random_key(new_key);
#endif /* NOENCRYPTION */
return(KADM_SUCCESS);
}
return(status);
}
void
get_key_from_password(key)
des_cblock key;
{
char password[MAX_KPW_LEN]; /* storage for the password */
if (read_long_pw_string(password, sizeof(password)-1, "Password: ", 1))
leave("Error reading password.", 1);
#ifdef NOENCRYPTION
(void) bzero((char *) key, sizeof(des_cblock));
key[0] = (unsigned char) 1;
#else /* NOENCRYPTION */
(void) des_string_to_key(password, key);
#endif /* NOENCRYPTION */
(void) bzero((char *)password, sizeof(password));
}
usage()
{
(void) fprintf(stderr, "Usage: ksrvutil [-f keyfile] [-i] [-k] ");
(void) fprintf(stderr, "{list | change | add}\n");
(void) fprintf(stderr, " -i causes the program to ask for ");
(void) fprintf(stderr, "confirmation before changing keys.\n");
(void) fprintf(stderr, " -k causes the key to printed for list or ");
(void) fprintf(stderr, "change.\n");
exit(1);
}
void
leave(str,x)
char *str;
int x;
{
if (str)
(void) fprintf(stderr, "%s\n", str);
(void) dest_tkt();
exit(x);
}

10
eBones/usr.sbin/ksrvutil/Makefile Normal file
View File

@ -0,0 +1,10 @@
# $Id$
PROG= ksrvutil
SRCS= ksrvutil.c
CFLAGS+= -I${.CURDIR}/../include -I${.CURDIR}/../libkadm
LDADD+= -L${KADMOBJDIR} -lkadm -L${KRBOBJDIR} -lkrb -L${DESOBJDIR} -ldes \
-lcom_err
NOMAN= #man page installed by ../man
.include <bsd.prog.mk>

580
eBones/usr.sbin/ksrvutil/ksrvutil.c Normal file
View File

@ -0,0 +1,580 @@
/*
* Copyright 1989 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* Copyright.MIT.
*
* list and update contents of srvtab files
*/
#ifndef lint
#if 0
static char rcsid_ksrvutil_c[] =
"BonesHeader: /afs/athena.mit.edu/astaff/project/kerberos/src/kadmin/RCS/ksrvutil.c,v 4.1 89/09/26 09:33:49 jtkohl Exp ";
#endif
static const char rcsid[] =
"$Id$";
#endif lint
/*
* ksrvutil
* list and update the contents of srvtab files
*/
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#include <sys/types.h>
#include <sys/file.h>
#include <sys/param.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#include <kadm.h>
#include <err.h>
#ifdef NOENCRYPTION
#define read_long_pw_string placebo_read_pw_string
#else /* NOENCRYPTION */
#define read_long_pw_string des_read_pw_string
#endif /* NOENCRYPTION */
int read_long_pw_string();
#define SRVTAB_MODE 0600 /* rw------- */
#define PAD " "
#define VNO_HEADER "Version"
#define VNO_FORMAT "%4d "
#define KEY_HEADER " Key " /* 17 characters long */
#define PRINC_HEADER " Principal\n"
#define PRINC_FORMAT "%s"
extern int errno;
extern void krb_set_tkt_string();
void leave();
unsigned short get_mode();
void
copy_keyfile(progname, keyfile, backup_keyfile)
char *progname;
char *keyfile;
char *backup_keyfile;
{
int keyfile_fd;
int backup_keyfile_fd;
int keyfile_mode;
char buf[BUFSIZ]; /* for copying keyfiles */
int rcount; /* for copying keyfiles */
int try_again;
(void) bzero((char *)buf, sizeof(buf));
do {
try_again = FALSE;
if ((keyfile_fd = open(keyfile, O_RDONLY, 0)) < 0) {
if (errno != ENOENT) {
err(1, "unable to read %s", keyfile);
}
else {
try_again = TRUE;
if ((keyfile_fd =
open(keyfile,
O_WRONLY | O_TRUNC | O_CREAT, SRVTAB_MODE)) < 0) {
err(1, "unable to create %s", keyfile);
}
else
if (close(keyfile_fd) < 0) {
err(1, "failure closing %s", keyfile);
}
}
}
} while(try_again);
keyfile_mode = get_mode(keyfile);
if ((backup_keyfile_fd =
open(backup_keyfile, O_WRONLY | O_TRUNC | O_CREAT,
keyfile_mode)) < 0) {
err(1, "unable to write %s", backup_keyfile);
}
do {
if ((rcount = read(keyfile_fd, (char *)buf, sizeof(buf))) < 0) {
err(1, "error reading %s", keyfile);
}
if (rcount && (write(backup_keyfile_fd, buf, rcount) != rcount)) {
err(1, "error writing %s", backup_keyfile);
}
} while (rcount);
if (close(backup_keyfile_fd) < 0) {
err(1, "error closing %s", backup_keyfile);
}
if (close(keyfile_fd) < 0) {
err(1, "error closing %s", keyfile);
}
}
void
safe_read_stdin(prompt, buf, size)
char *prompt;
char *buf;
int size;
{
(void) printf(prompt);
(void) fflush(stdout);
(void) bzero(buf, size);
if (read(0, buf, size - 1) < 0) {
warn("failure reading from stdin");
leave((char *)NULL, 1);
}
fflush(stdin);
buf[strlen(buf)-1] = 0;
}
void
safe_write(progname, filename, fd, buf, len)
char *progname;
char *filename;
int fd;
char *buf;
int len;
{
if (write(fd, buf, len) != len) {
warn("failure writing %s", filename);
close(fd);
leave("In progress srvtab in this file.", 1);
}
}
int
yn(string)
char *string;
{
char ynbuf[5];
(void) printf("%s (y,n) [y] ", string);
for (;;) {
safe_read_stdin("", ynbuf, sizeof(ynbuf));
if ((ynbuf[0] == 'n') || (ynbuf[0] == 'N'))
return(0);
else if ((ynbuf[0] == 'y') || (ynbuf[0] == 'Y') || (ynbuf[0] == 0))
return(1);
else {
(void) printf("Please enter 'y' or 'n': ");
fflush(stdout);
}
}
}
void
append_srvtab(progname, filename, fd, sname, sinst,
srealm, key_vno, key)
char *progname;
char *filename;
int fd;
char *sname;
char *sinst;
char *srealm;
unsigned char key_vno;
des_cblock key;
{
/* Add one to append null */
safe_write(progname, filename, fd, sname, strlen(sname) + 1);
safe_write(progname, filename, fd, sinst, strlen(sinst) + 1);
safe_write(progname, filename, fd, srealm, strlen(srealm) + 1);
safe_write(progname, filename, fd, (char *)&key_vno, 1);
safe_write(progname, filename, fd, (char *)key, sizeof(des_cblock));
(void) fsync(fd);
}
unsigned short
get_mode(filename)
char *filename;
{
struct stat statbuf;
unsigned short mode;
(void) bzero((char *)&statbuf, sizeof(statbuf));
if (stat(filename, &statbuf) < 0)
mode = SRVTAB_MODE;
else
mode = statbuf.st_mode;
return(mode);
}
main(argc,argv)
int argc;
char *argv[];
{
char sname[ANAME_SZ]; /* name of service */
char sinst[INST_SZ]; /* instance of service */
char srealm[REALM_SZ]; /* realm of service */
unsigned char key_vno; /* key version number */
int status; /* general purpose error status */
des_cblock new_key;
des_cblock old_key;
char change_tkt[MAXPATHLEN]; /* Ticket to use for key change */
char keyfile[MAXPATHLEN]; /* Original keyfile */
char work_keyfile[MAXPATHLEN]; /* Working copy of keyfile */
char backup_keyfile[MAXPATHLEN]; /* Backup copy of keyfile */
unsigned short keyfile_mode; /* Protections on keyfile */
int work_keyfile_fd = -1; /* Initialize so that */
int backup_keyfile_fd = -1; /* compiler doesn't complain */
char local_realm[REALM_SZ]; /* local kerberos realm */
int i;
int interactive = FALSE;
int list = FALSE;
int change = FALSE;
int add = FALSE;
int key = FALSE; /* do we show keys? */
int arg_entered = FALSE;
int change_this_key = FALSE;
char databuf[BUFSIZ];
int first_printed = FALSE; /* have we printed the first item? */
int get_svc_new_key();
void get_key_from_password();
void print_key();
void print_name();
(void) bzero((char *)sname, sizeof(sname));
(void) bzero((char *)sinst, sizeof(sinst));
(void) bzero((char *)srealm, sizeof(srealm));
(void) bzero((char *)change_tkt, sizeof(change_tkt));
(void) bzero((char *)keyfile, sizeof(keyfile));
(void) bzero((char *)work_keyfile, sizeof(work_keyfile));
(void) bzero((char *)backup_keyfile, sizeof(backup_keyfile));
(void) bzero((char *)local_realm, sizeof(local_realm));
(void) sprintf(change_tkt, "/tmp/tkt_ksrvutil.%d", getpid());
krb_set_tkt_string(change_tkt);
/* This is used only as a default for adding keys */
if (krb_get_lrealm(local_realm, 1) != KSUCCESS)
(void) strcpy(local_realm, KRB_REALM);
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-i") == 0)
interactive++;
else if (strcmp(argv[i], "-k") == 0)
key++;
else if (strcmp(argv[i], "list") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
list++;
}
}
else if (strcmp(argv[i], "change") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
change++;
}
}
else if (strcmp(argv[i], "add") == 0) {
if (arg_entered)
usage();
else {
arg_entered++;
add++;
}
}
else if (strcmp(argv[i], "-f") == 0) {
if (++i == argc)
usage();
else
(void) strcpy(keyfile, argv[i]);
}
else
usage();
}
if (!arg_entered)
usage();
if (!keyfile[0])
(void) strcpy(keyfile, KEYFILE);
(void) strcpy(work_keyfile, keyfile);
(void) strcpy(backup_keyfile, keyfile);
if (change || add) {
(void) strcat(work_keyfile, ".work");
(void) strcat(backup_keyfile, ".old");
copy_keyfile(argv[0], keyfile, backup_keyfile);
}
if (add)
copy_keyfile(argv[0], backup_keyfile, work_keyfile);
keyfile_mode = get_mode(keyfile);
if (change || list) {
if ((backup_keyfile_fd = open(backup_keyfile, O_RDONLY, 0)) < 0) {
err(1, "unable to read %s", backup_keyfile);
}
}
if (change) {
if ((work_keyfile_fd =
open(work_keyfile, O_WRONLY | O_CREAT | O_TRUNC,
SRVTAB_MODE)) < 0) {
err(1, "unable to write %s", work_keyfile);
}
}
else if (add) {
if ((work_keyfile_fd =
open(work_keyfile, O_APPEND | O_WRONLY, SRVTAB_MODE)) < 0) {
err(1, "unable to append to %s", work_keyfile);
}
}
if (change || list) {
while ((getst(backup_keyfile_fd, sname, SNAME_SZ) > 0) &&
(getst(backup_keyfile_fd, sinst, INST_SZ) > 0) &&
(getst(backup_keyfile_fd, srealm, REALM_SZ) > 0) &&
(read(backup_keyfile_fd, &key_vno, 1) > 0) &&
(read(backup_keyfile_fd,(char *)old_key,sizeof(old_key)) > 0)) {
if (list) {
if (!first_printed) {
(void) printf(VNO_HEADER);
(void) printf(PAD);
if (key) {
(void) printf(KEY_HEADER);
(void) printf(PAD);
}
(void) printf(PRINC_HEADER);
first_printed = 1;
}
(void) printf(VNO_FORMAT, key_vno);
(void) printf(PAD);
if (key) {
print_key(old_key);
(void) printf(PAD);
}
print_name(sname, sinst, srealm);
(void) printf("\n");
}
else if (change) {
(void) printf("\nPrincipal: ");
print_name(sname, sinst, srealm);
(void) printf("; version %d\n", key_vno);
if (interactive)
change_this_key = yn("Change this key?");
else if (change)
change_this_key = 1;
else
change_this_key = 0;
if (change_this_key)
(void) printf("Changing to version %d.\n", key_vno + 1);
else if (change)
(void) printf("Not changing this key.\n");
if (change_this_key) {
/*
* Pick a new key and determine whether or not
* it is safe to change
*/
if ((status =
get_svc_new_key(new_key, sname, sinst,
srealm, keyfile)) == KADM_SUCCESS)
key_vno++;
else {
(void) bcopy(old_key, new_key, sizeof(new_key));
(void) fprintf(stderr, "%s: Key NOT changed: %s\n",
argv[0], krb_err_txt[status]);
change_this_key = FALSE;
}
}
else
(void) bcopy(old_key, new_key, sizeof(new_key));
append_srvtab(argv[0], work_keyfile, work_keyfile_fd,
sname, sinst, srealm, key_vno, new_key);
if (key && change_this_key) {
(void) printf("Old key: ");
print_key(old_key);
(void) printf("; new key: ");
print_key(new_key);
(void) printf("\n");
}
if (change_this_key) {
if ((status = kadm_change_pw(new_key)) == KADM_SUCCESS) {
(void) printf("Key changed.\n");
(void) dest_tkt();
}
else {
com_err(argv[0], status,
" attempting to change password.");
(void) dest_tkt();
/* XXX This knows the format of a keyfile */
if (lseek(work_keyfile_fd, -9, L_INCR) >= 0) {
key_vno--;
safe_write(argv[0], work_keyfile,
work_keyfile_fd, (char *)&key_vno, 1);
safe_write(argv[0], work_keyfile, work_keyfile_fd,
(char *)old_key, sizeof(des_cblock));
(void) fsync(work_keyfile_fd);
(void) fprintf(stderr,"Key NOT changed.\n");
}
else {
warn("unable to revert keyfile");
leave("", 1);
}
}
}
}
bzero((char *)old_key, sizeof(des_cblock));
bzero((char *)new_key, sizeof(des_cblock));
}
}
else if (add) {
do {
do {
safe_read_stdin("Name: ", databuf, sizeof(databuf));
(void) strncpy(sname, databuf, sizeof(sname) - 1);
safe_read_stdin("Instance: ", databuf, sizeof(databuf));
(void) strncpy(sinst, databuf, sizeof(sinst) - 1);
safe_read_stdin("Realm: ", databuf, sizeof(databuf));
(void) strncpy(srealm, databuf, sizeof(srealm) - 1);
safe_read_stdin("Version number: ", databuf, sizeof(databuf));
key_vno = atoi(databuf);
if (!srealm[0])
(void) strcpy(srealm, local_realm);
(void) printf("New principal: ");
print_name(sname, sinst, srealm);
(void) printf("; version %d\n", key_vno);
} while (!yn("Is this correct?"));
get_key_from_password(new_key);
if (key) {
(void) printf("Key: ");
print_key(new_key);
(void) printf("\n");
}
append_srvtab(argv[0], work_keyfile, work_keyfile_fd,
sname, sinst, srealm, key_vno, new_key);
(void) printf("Key successfully added.\n");
} while (yn("Would you like to add another key?"));
}
if (change || list)
if (close(backup_keyfile_fd) < 0) {
warn("failure closing %s, continuing", backup_keyfile);
}
if (change || add) {
if (close(work_keyfile_fd) < 0) {
err(1, "failure closing %s", work_keyfile);
}
if (rename(work_keyfile, keyfile) < 0) {
err(1, "failure renaming %s to %s", work_keyfile, keyfile);
}
(void) chmod(backup_keyfile, keyfile_mode);
(void) chmod(keyfile, keyfile_mode);
(void) printf("Old keyfile in %s.\n", backup_keyfile);
}
exit(0);
}
void
print_key(key)
des_cblock key;
{
int i;
for (i = 0; i < 4; i++)
(void) printf("%02x", key[i]);
(void) printf(" ");
for (i = 4; i < 8; i++)
(void) printf("%02x", key[i]);
}
void
print_name(name, inst, realm)
char *name;
char *inst;
char *realm;
{
(void) printf("%s%s%s%s%s", name, inst[0] ? "." : "", inst,
realm[0] ? "@" : "", realm);
}
int
get_svc_new_key(new_key, sname, sinst, srealm, keyfile)
des_cblock new_key;
char *sname;
char *sinst;
char *srealm;
char *keyfile;
{
int status = KADM_SUCCESS;
if (((status = krb_get_svc_in_tkt(sname, sinst, srealm, PWSERV_NAME,
KADM_SINST, 1, keyfile)) == KSUCCESS) &&
((status = kadm_init_link("changepw", KRB_MASTER, srealm)) ==
KADM_SUCCESS)) {
#ifdef NOENCRYPTION
(void) bzero((char *) new_key, sizeof(des_cblock));
new_key[0] = (unsigned char) 1;
#else /* NOENCRYPTION */
(void) des_random_key(new_key);
#endif /* NOENCRYPTION */
return(KADM_SUCCESS);
}
return(status);
}
void
get_key_from_password(key)
des_cblock key;
{
char password[MAX_KPW_LEN]; /* storage for the password */
if (read_long_pw_string(password, sizeof(password)-1, "Password: ", 1))
leave("Error reading password.", 1);
#ifdef NOENCRYPTION
(void) bzero((char *) key, sizeof(des_cblock));
key[0] = (unsigned char) 1;
#else /* NOENCRYPTION */
(void) des_string_to_key(password, key);
#endif /* NOENCRYPTION */
(void) bzero((char *)password, sizeof(password));
}
usage()
{
(void) fprintf(stderr, "Usage: ksrvutil [-f keyfile] [-i] [-k] ");
(void) fprintf(stderr, "{list | change | add}\n");
(void) fprintf(stderr, " -i causes the program to ask for ");
(void) fprintf(stderr, "confirmation before changing keys.\n");
(void) fprintf(stderr, " -k causes the key to printed for list or ");
(void) fprintf(stderr, "change.\n");
exit(1);
}
void
leave(str,x)
char *str;
int x;
{
if (str)
(void) fprintf(stderr, "%s\n", str);
(void) dest_tkt();
exit(x);
}