430 lines
12 KiB
C
430 lines
12 KiB
C
/* opiepasswd.c: Add/change an OTP password in the key database.
|
|
|
|
%%% portions-copyright-cmetz-96
|
|
Portions of this software are Copyright 1996-1997 by Craig Metz, All Rights
|
|
Reserved. The Inner Net License Version 2 applies to these portions of
|
|
the software.
|
|
You should have received a copy of the license with this software. If
|
|
you didn't get a copy, you may request one from <license@inner.net>.
|
|
|
|
Portions of this software are Copyright 1995 by Randall Atkinson and Dan
|
|
McDonald, All Rights Reserved. All Rights under this copyright are assigned
|
|
to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
|
|
License Agreement applies to this software.
|
|
|
|
History:
|
|
|
|
Modified by cmetz for OPIE 2.3. Got of some variables and made some
|
|
local to where they're used. Split out the finishing code. Use
|
|
opielookup() instead of opiechallenge() to find user. Three
|
|
strikes on prompts. Use opiepasswd()'s new calling
|
|
convention. Changed OPIE_PASS_{MAX,MIN} to
|
|
OPIE_SECRET_{MAX,MIN}. Handle automatic reinits happenning
|
|
below us. Got rid of unneeded headers. Use new opieatob8()
|
|
return value convention. Added -f flag. Added SHA support.
|
|
Modified by cmetz for OPIE 2.22. Finally got rid of the lock
|
|
filename kluge by implementing refcounts for locks.
|
|
Use opiepasswd() to update key file. Error if we can't
|
|
write to the key file. Check for minimum seed length.
|
|
Modified at NRL for OPIE 2.2. Changed opiestrip_crlf to
|
|
opiestripcrlf. Check opiereadpass() return value.
|
|
Minor optimization. Change calls to opiereadpass() to
|
|
use echo arg. Use opiereadpass() where we can.
|
|
Make everything static. Ifdef around some headers.
|
|
Changed use of gethostname() to uname(). Got rid of
|
|
the need for buf[]. Properly check return value of
|
|
opieatob8. Check seed length. Always generate proper-
|
|
length seeds.
|
|
Modified at NRL for OPIE 2.1. Minor autoconf changes.
|
|
Modified heavily at NRL for OPIE 2.0.
|
|
Written at Bellcore for the S/Key Version 1 software distribution
|
|
(skeyinit.c).
|
|
*/
|
|
#include "opie_cfg.h"
|
|
|
|
#if HAVE_PWD_H
|
|
#include <pwd.h>
|
|
#endif /* HAVE_PWD_H */
|
|
#include <stdio.h>
|
|
#if HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif /* HAVE_UNISTD_H */
|
|
#if HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif /* HAVE_STDLIB_H */
|
|
|
|
#include "opie.h"
|
|
|
|
#define MODE_DEFAULT 0
|
|
#define MODE_CONSOLE 1
|
|
#define MODE_DISABLE 2
|
|
|
|
extern int optind;
|
|
extern char *optarg;
|
|
|
|
char *algnames[] = { NULL, NULL, NULL, "SHA-1", "MD4", "MD5" };
|
|
char *algids[] = { NULL, NULL, NULL, "sha1", "md4", "md5" };
|
|
|
|
static VOIDRET usage FUNCTION((myname), char *myname)
|
|
{
|
|
fprintf(stderr, "usage: %s [-v] [-h] [-c|-d] [-f] [-n initial_sequence_number]\n [-s seed] [username]\n", myname);
|
|
exit(1);
|
|
}
|
|
|
|
static VOIDRET finish FUNCTION((name), char *name)
|
|
{
|
|
struct opie opie;
|
|
char buf[OPIE_RESPONSE_MAX + 1];
|
|
|
|
if (name) {
|
|
if (opiechallenge(&opie, name, buf)) {
|
|
fprintf(stderr, "Error verifying database.\n");
|
|
finish(NULL);
|
|
}
|
|
printf("\nID %s ", opie.opie_principal);
|
|
if (opie.opie_val && (opie.opie_val[0] == '*')) {
|
|
printf("is disabled.\n");
|
|
finish(NULL);
|
|
}
|
|
printf("OTP key is %d %s\n", opie.opie_n, opie.opie_seed);
|
|
{
|
|
char key[8];
|
|
if (!opieatob8(key, opie.opie_val)) {
|
|
fprintf(stderr, "Error verifying key -- possible database corruption.\n");
|
|
finish(NULL);
|
|
}
|
|
printf("%s\n", opiebtoe(buf, key));
|
|
}
|
|
}
|
|
|
|
while(!opieunlock());
|
|
exit(name ? 0 : 1);
|
|
}
|
|
|
|
int main FUNCTION((argc, argv), int argc AND char *argv[])
|
|
{
|
|
struct opie opie;
|
|
int rval, n = 499, i, mode = MODE_DEFAULT, force = 0;
|
|
char seed[18];
|
|
struct passwd *pp;
|
|
|
|
memset(seed, 0, sizeof(seed));
|
|
|
|
if (!(pp = getpwuid(getuid()))) {
|
|
fprintf(stderr, "Who are you?");
|
|
return 1;
|
|
}
|
|
|
|
while ((i = getopt(argc, argv, "fhvcn:s:d")) != EOF) {
|
|
switch (i) {
|
|
case 'v':
|
|
opieversion();
|
|
case 'f':
|
|
#if INSECURE_OVERRIDE
|
|
force = 1;
|
|
#else /* INSECURE_OVERRIDE */
|
|
fprintf(stderr, "Sorry, but the -f option is not supported by this build of OPIE.\n");
|
|
#endif /* INSECURE_OVERRIDE */
|
|
break;
|
|
case 'c':
|
|
mode = MODE_CONSOLE;
|
|
break;
|
|
case 'd':
|
|
mode = MODE_DISABLE;
|
|
break;
|
|
case 'n':
|
|
i = atoi(optarg);
|
|
if (!(i > 0 && i < 10000)) {
|
|
printf("Sequence numbers must be > 0 and < 10000\n");
|
|
finish(NULL);
|
|
}
|
|
n = i;
|
|
break;
|
|
case 's':
|
|
i = strlen(optarg);
|
|
if ((i > OPIE_SEED_MAX) || (i < OPIE_SEED_MIN)) {
|
|
printf("Seeds must be between %d and %d characters long.\n",
|
|
OPIE_SEED_MIN, OPIE_SEED_MAX);
|
|
finish(NULL);
|
|
}
|
|
strncpy(seed, optarg, sizeof(seed));
|
|
seed[sizeof(seed) - 1] = 0;
|
|
break;
|
|
default:
|
|
usage(argv[0]);
|
|
}
|
|
}
|
|
|
|
if (argc - optind >= 1) {
|
|
if (strcmp(argv[optind], pp->pw_name)) {
|
|
if (getuid()) {
|
|
printf("Only root can change others' passwords.\n");
|
|
exit(1);
|
|
}
|
|
if ((pp = getpwnam(argv[optind])) == NULL) {
|
|
printf("%s: user unknown.\n", argv[optind]);
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
opielock(pp->pw_name);
|
|
rval = opielookup(&opie, pp->pw_name);
|
|
|
|
switch (rval) {
|
|
case 0:
|
|
printf("Updating %s:\n", pp->pw_name);
|
|
break;
|
|
case 1:
|
|
printf("Adding %s:\n", pp->pw_name);
|
|
break;
|
|
case 2:
|
|
fprintf(stderr, "Error: Can't update key database.\n");
|
|
exit(1);
|
|
default:
|
|
fprintf(stderr, "Error reading key database\n");
|
|
exit(1);
|
|
}
|
|
|
|
if (seed[0]) {
|
|
i = strlen(seed);
|
|
if (i > OPIE_SEED_MAX) {
|
|
fprintf(stderr, "Seeds must be less than %d characters long.", OPIE_SEED_MAX);
|
|
finish(NULL);
|
|
}
|
|
if (i < OPIE_SEED_MIN) {
|
|
fprintf(stderr, "Seeds must be greater than %d characters long.", OPIE_SEED_MIN);
|
|
finish(NULL);
|
|
}
|
|
} else {
|
|
if (!rval)
|
|
strcpy(seed, opie.opie_seed);
|
|
|
|
if (opienewseed(seed) < 0) {
|
|
fprintf(stderr, "Error updating seed.\n");
|
|
finish(NULL);
|
|
}
|
|
}
|
|
|
|
if (opie.opie_seed && opie.opie_seed[0] && !strcmp(opie.opie_seed, seed)) {
|
|
fprintf(stderr, "You must use a different seed for the new OTP sequence.\n");
|
|
finish(NULL);
|
|
}
|
|
|
|
switch(mode) {
|
|
case MODE_DEFAULT:
|
|
{
|
|
char tmp[OPIE_RESPONSE_MAX + 2];
|
|
|
|
printf("You need the response from an OTP generator.\n");
|
|
#if DEBUG
|
|
if (!rval) {
|
|
#else /* DEBUG */
|
|
if (!rval && getuid()) {
|
|
#endif /* DEBUG */
|
|
char oseed[OPIE_SEED_MAX + 1];
|
|
int on;
|
|
|
|
if (opiechallenge(&opie, pp->pw_name, tmp)) {
|
|
fprintf(stderr, "Error issuing challenge.\n");
|
|
finish(NULL);
|
|
}
|
|
on = opiegetsequence(&opie);
|
|
{
|
|
char *c;
|
|
if (c = strrchr(tmp, ' '))
|
|
strncpy(oseed, c + 1, sizeof(oseed));
|
|
else {
|
|
#if DEBUG
|
|
fprintf(stderr, "opiepasswd: bogus challenge\n");
|
|
#endif /* DEBUG */
|
|
finish(NULL);
|
|
}
|
|
}
|
|
printf("Old secret pass phrase:\n\t%s\n\tResponse: ", tmp);
|
|
if (!opiereadpass(tmp, sizeof(tmp), 1))
|
|
tmp[0] = 0;
|
|
i = opieverify(&opie, tmp);
|
|
if (!tmp[0]) {
|
|
fprintf(stderr, "Error reading response.\n");
|
|
finish(NULL);
|
|
}
|
|
if (i) {
|
|
fprintf(stderr, "Error verifying response.\n");
|
|
#if DEBUG
|
|
fprintf(stderr, "opiepasswd: opieverify() returned %d\n", i);
|
|
#endif /* DEBUG */
|
|
finish(NULL);
|
|
}
|
|
{
|
|
char nseed[OPIE_SEED_MAX + 1];
|
|
int nn;
|
|
|
|
if (opiechallenge(&opie, pp->pw_name, tmp)) {
|
|
fprintf(stderr, "Error verifying database.\n");
|
|
finish(NULL);
|
|
}
|
|
|
|
nn = opiegetsequence(&opie);
|
|
{
|
|
char *c;
|
|
if (c = strrchr(tmp, ' '))
|
|
strncpy(nseed, c + 1, sizeof(nseed));
|
|
else {
|
|
#if DEBUG
|
|
fprintf(stderr, "opiepasswd: bogus challenge\n");
|
|
#endif /* DEBUG */
|
|
finish(NULL);
|
|
}
|
|
}
|
|
|
|
opieverify(&opie, "");
|
|
nn++;
|
|
|
|
if ((nn != on) || strcmp(oseed, nseed))
|
|
finish(pp->pw_name);
|
|
}
|
|
}
|
|
printf("New secret pass phrase:");
|
|
for (i = 0;; i++) {
|
|
if (i > 2)
|
|
finish(NULL);
|
|
printf("\n\totp-%s %d %s\n\tResponse: ", algids[MDX], n, seed);
|
|
if (!opiereadpass(tmp, sizeof(tmp), 1)) {
|
|
fprintf(stderr, "Error reading response.\n");
|
|
finish(NULL);
|
|
}
|
|
if (tmp[0] == '?') {
|
|
printf("Enter the response from your OTP calculator: \n");
|
|
continue;
|
|
}
|
|
if (tmp[0] == '\0') {
|
|
fprintf(stderr, "Secret pass phrase unchanged.\n");
|
|
finish(NULL);
|
|
}
|
|
|
|
if (!(rval = opiepasswd(&opie, 0, pp->pw_name, n, seed, tmp)))
|
|
finish(pp->pw_name);
|
|
|
|
if (rval < 0) {
|
|
fprintf(stderr, "Error updating key database.\n");
|
|
finish(NULL);
|
|
}
|
|
printf("\tThat is not a valid OTP response.\n");
|
|
}
|
|
}
|
|
break;
|
|
case MODE_CONSOLE:
|
|
{
|
|
char passwd[OPIE_SECRET_MAX + 1], passwd2[OPIE_SECRET_MAX + 1];
|
|
/* Get user's secret password */
|
|
fprintf(stderr, "Only use this method from the console; NEVER from remote. If you are using\n");
|
|
fprintf(stderr, "telnet, xterm, or a dial-in, type ^C now or exit with no password.\n");
|
|
fprintf(stderr, "Then run opiepasswd without the -c parameter.\n");
|
|
if (opieinsecure()) {
|
|
fprintf(stderr, "Sorry, but you don't seem to be on the console or a secure terminal.\n");
|
|
if (force)
|
|
fprintf(stderr, "Warning: Continuing could disclose your secret pass phrase to an attacker!\n");
|
|
else
|
|
finish(NULL);
|
|
};
|
|
printf("Using %s to compute responses.\n", algnames[MDX]);
|
|
if (!rval && getuid()) {
|
|
printf("Enter old secret pass phrase: ");
|
|
if (!opiereadpass(passwd, sizeof(passwd), 0)) {
|
|
fprintf(stderr, "Error reading secret pass phrase!\n");
|
|
finish(NULL);
|
|
}
|
|
if (!passwd[0]) {
|
|
fprintf(stderr, "Secret pass phrase unchanged.\n");
|
|
finish(NULL);
|
|
}
|
|
{
|
|
char key[8];
|
|
char tbuf[OPIE_RESPONSE_MAX + 1];
|
|
|
|
if (opiekeycrunch(MDX, key, opie.opie_seed, passwd) != 0) {
|
|
fprintf(stderr, "%s: key crunch failed. Secret pass phrase unchanged\n", argv[0]);
|
|
finish(NULL);
|
|
}
|
|
memset(passwd, 0, sizeof(passwd));
|
|
i = opie.opie_n - 1;
|
|
while (i-- != 0)
|
|
opiehash(key, MDX);
|
|
opiebtoe(tbuf, key);
|
|
if (opieverify(&opie, tbuf)) {
|
|
fprintf(stderr, "Sorry.\n");
|
|
finish(NULL);
|
|
}
|
|
}
|
|
}
|
|
for (i = 0;; i++) {
|
|
if (i > 2)
|
|
finish(NULL);
|
|
printf("Enter new secret pass phrase: ");
|
|
if (!opiereadpass(passwd, sizeof(passwd), 0)) {
|
|
fprintf(stderr, "Error reading secret pass phrase.\n");
|
|
finish(NULL);
|
|
}
|
|
if (!passwd[0] || feof(stdin)) {
|
|
fprintf(stderr, "Secret pass phrase unchanged.\n");
|
|
finish(NULL);
|
|
}
|
|
if (opiepasscheck(passwd)) {
|
|
memset(passwd, 0, sizeof(passwd));
|
|
fprintf(stderr, "Secret pass phrases must be between %d and %d characters long.\n", OPIE_SECRET_MIN, OPIE_SECRET_MAX);
|
|
continue;
|
|
}
|
|
printf("Again new secret pass phrase: ");
|
|
if (!opiereadpass(passwd2, sizeof(passwd2), 0)) {
|
|
fprintf(stderr, "Error reading secret pass phrase.\n");
|
|
finish(NULL);
|
|
}
|
|
if (feof(stdin)) {
|
|
fprintf(stderr, "Secret pass phrase unchanged.\n");
|
|
finish(NULL);
|
|
}
|
|
if (!passwd[0] || !strcmp(passwd, passwd2))
|
|
break;
|
|
fprintf(stderr, "Sorry, no match.\n");
|
|
}
|
|
memset(passwd2, 0, sizeof(passwd2));
|
|
if (opiepasswd(&opie, 1, pp->pw_name, n, seed, passwd)) {
|
|
fprintf(stderr, "Error updating key database.\n");
|
|
finish(NULL);
|
|
}
|
|
finish(pp->pw_name);
|
|
}
|
|
case MODE_DISABLE:
|
|
{
|
|
char tmp[4];
|
|
int i;
|
|
|
|
for (i = 0;; i++) {
|
|
if (i > 2)
|
|
finish(NULL);
|
|
|
|
printf("Disable %s's OTP access? (yes or no) ", pp->pw_name);
|
|
if (!opiereadpass(tmp, sizeof(tmp), 1)) {
|
|
fprintf(stderr, "Error reading entry.\n");
|
|
finish(NULL);
|
|
}
|
|
if (!strcmp(tmp, "no"))
|
|
finish(NULL);
|
|
if (!strcmp(tmp, "yes")) {
|
|
if (opiepasswd(&opie, 0, pp->pw_name, n, seed, NULL)) {
|
|
fprintf(stderr, "Error updating key database.\n");
|
|
finish(NULL);
|
|
}
|
|
finish(pp->pw_name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|