#if defined(KERBEROS) && !defined(openbsd)
/*
* $Source: /repo/OpenLDAP/pkg/ldap/clients/ud/string_to_key.c,v $
* $Author: kurt $
*
* Copyright 1985, 1986, 1987, 1988, 1989 by the Massachusetts Institute
* of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*
* These routines perform encryption and decryption using the DES
* private key algorithm, or else a subset of it-- fewer inner loops.
* (AUTH_DES_ITER defaults to 16, may be less.)
*
* Under U.S. law, this software may not be exported outside the US
* without license from the U.S. Commerce department.
*
* The key schedule is passed as an arg, as well as the cleartext or
* ciphertext. The cleartext and ciphertext should be in host order.
*
* These routines form the library interface to the DES facilities.
*
* spm 8/85 MIT project athena
*/
#ifdef KERBEROS_V
#include <kerberosIV/mit-copyright.h>
#include <kerberosIV/des.h>
#else
#include <mit-copyright.h>
#include <des.h>
#endif /* KERBEROS_V */
#include <stdio.h>
/* #include "des_internal.h" */
#if 1
#ifdef KERBEROS_V
#include <kerberosIV/krb.h>
#else
#include <krb.h>
#endif /* KERBEROS_V */
#endif /* 1 */
extern int des_debug;
extern int des_debug_print();
extern void des_fixup_key_parity();
#ifndef AFSKERBEROS
#define WORLDPEACEINOURTIME
#endif
#if defined(WORLDPEACEINOURTIME) /* Use original, not ifs version */
#ifndef KERBEROS_V
/*
* convert an arbitrary length string to a DES key
*/
int
des_string_to_key(str,key)
char *str;
register des_cblock *key;
{
register char *in_str;
register unsigned temp,i;
register int j;
register long length;
static unsigned char *k_p;
static int forward;
register char *p_char;
static char k_char[64];
static des_key_schedule key_sked;
extern unsigned long des_cbc_cksum();
in_str = str;
forward = 1;
p_char = k_char;
length = strlen(str);
/* init key array for bits */
memset(k_char, 0, sizeof(k_char));
#ifdef DEBUG
if (des_debug)
fprintf(stdout,
"\n\ninput str length = %d string = %s\nstring = 0x ",
length,str);
#endif
/* get next 8 bytes, strip parity, xor */
for (i = 1; i <= length; i++) {
/* get next input key byte */
temp = (unsigned int) *str++;
#ifdef DEBUG
if (des_debug)
fprintf(stdout,"%02x ",temp & 0xff);
#endif
/* loop through bits within byte, ignore parity */
for (j = 0; j <= 6; j++) {
if (forward)
*p_char++ ^= (int) temp & 01;
else
*--p_char ^= (int) temp & 01;
temp = temp >> 1;
} while (--j > 0);
/* check and flip direction */
if ((i%8) == 0)
forward = !forward;
}
/* now stuff into the key des_cblock, and force odd parity */
p_char = k_char;
k_p = (unsigned char *) key;
for (i = 0; i <= 7; i++) {
temp = 0;
for (j = 0; j <= 6; j++)
temp |= *p_char++ << (1+j);
*k_p++ = (unsigned char) temp;
}
/* fix key parity */
des_fixup_key_parity(key);
/* Now one-way encrypt it with the folded key */
(void) des_key_sched(key,key_sked);
(void) des_cbc_cksum((des_cblock *)in_str,key,length,key_sked,key);
/* erase key_sked */
memset((char *)key_sked, 0, sizeof(key_sked));
/* now fix up key parity again */
des_fixup_key_parity(key);
if (des_debug)
fprintf(stdout,
"\nResulting string_to_key = 0x%x 0x%x\n",
*((unsigned long *) key),
*((unsigned long *) key+1));
}
#endif /* KERBEROS_V */
#else /* Use ifs version */
#if 0
#include <stdio.h>
/* These two needed for rxgen output to work */
#include <sys/types.h>
#include <rx/xdr.h>
#include <afs/cellconfig.h>
#include <afs/auth.h>
#include "/usr/andy/kauth/kauth.h"
#include "/usr/andy/kauth/kautils.h"
#endif
/* This defines the Andrew string_to_key function. It accepts a password
string as input and converts its via a one-way encryption algorithm to a DES
encryption key. It is compatible with the original Andrew authentication
service password database. */
static void Andrew_StringToKey (str, cell, key)
char *str;
char *cell; /* cell for password */
des_cblock *key;
{ char password[8+1]; /* crypt is limited to 8 chars anyway */
int i;
int passlen;
memset(key, 0, sizeof(des_cblock));
memset(password, 0, sizeof(password));
strncpy (password, cell, 8);
passlen = strlen (str);
if (passlen > 8) passlen = 8;
for (i=0; i<passlen; i++)
password[i] = str[i] ^ cell[i];
for (i=0;i<8;i++)
if (password[i] == '\0') password[i] = 'X';
/* crypt only considers the first 8 characters of password but for some
reason returns eleven characters of result (plus the two salt chars). */
strncpy(key, crypt(password, "#~") + 2, sizeof(des_cblock));
/* parity is inserted into the LSB so leftshift each byte up one bit. This
allows ascii characters with a zero MSB to retain as much significance
as possible. */
{ char *keybytes = (char *)key;
unsigned int temp;
for (i = 0; i < 8; i++) {
temp = (unsigned int) keybytes[i];
keybytes[i] = (unsigned char) (temp << 1);
}
}
des_fixup_key_parity (key);
}
static void StringToKey (str, cell, key)
char *str;
char *cell; /* cell for password */
des_cblock *key;
{ des_key_schedule schedule;
char temp_key[8];
char ivec[8];
char password[BUFSIZ];
int passlen;
strncpy (password, str, sizeof(password));
if ((passlen = strlen (password)) < sizeof(password)-1)
strncat (password, cell, sizeof(password)-passlen);
if ((passlen = strlen(password)) > sizeof(password)) passlen = sizeof(password);
memcpy(ivec, "kerberos", 8);
memcpy(temp_key, "kerberos", 8);
des_fixup_key_parity (temp_key);
des_key_sched (temp_key, schedule);
des_cbc_cksum (password, ivec, passlen, schedule, ivec);
memcpy(temp_key, ivec, 8);
des_fixup_key_parity (temp_key);
des_key_sched (temp_key, schedule);
des_cbc_cksum (password, key, passlen, schedule, ivec);
des_fixup_key_parity (key);
}
/* static */ void
ka_StringToKey (str, cell, key)
char *str;
char *cell; /* cell for password */
des_cblock *key;
{ char realm[REALM_SZ];
#if NOWAYOUTTODAY
long code;
/* code = ka_CellToRealm (cell, realm, 0/*local*/); */
if (code) strcpy (realm, "");
else lcstring (realm, realm, sizeof(realm)); /* for backward compatibility */
#else
(void)strcpy(realm, cell);
#endif
if (strlen(str) > 8) StringToKey (str, realm, key);
else Andrew_StringToKey (str, realm, key);
}
/*
* convert an arbitrary length string to a DES key
*/
int
des_string_to_key(str,key)
char *str;
register des_cblock *key;
{
/* NB: i should probably call routine to get local cell here */
ka_StringToKey(str, "umich.edu", key);
return 0;
}
#endif /* Use IFS Version */
#endif /* kerberos */