OpenBSD-4.6/lib/libdes/fcrypt.c
/* crypto/des/fcrypt.c */
/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@mincom.oz.au).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@mincom.oz.au).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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 cryptographic software written by
* Eric Young (eay@mincom.oz.au)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@mincom.oz.au)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
/* Eric Young.
* This version of crypt has been developed from my MIT compatible
* DES library.
* The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au
* eay@mincom.oz.au or eay@psych.psy.uq.oz.au
*/
/* Modification by Jens Kupferschmidt (Cu)
* I have included directive _DES_PARA for shared memory computers.
* I have included a directive LONGCRYPT to using this routine to cipher
* passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN
* definition is the maximum of length of password and can changed. I have
* defined 24.
*/
#define FCRYPT_MOD(R,u,t,E0,E1,tmp) \
u=R>>16; \
t=R^u; \
u=t&E0; t=t&E1; \
tmp=(u<<16); u^=R^s[S ]; u^=tmp; \
tmp=(t<<16); t^=R^s[S+1]; t^=tmp
#define DES_FCRYPT
#include "des_locl.h"
#undef DES_FCRYPT
#undef PERM_OP
#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
(b)^=(t),\
(a)^=((t)<<(n)))
#undef HPERM_OP
#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
(a)=(a)^(t)^(t>>(16-(n))))\
#ifdef _DES_PARA
#define STATIC
#else
#define STATIC static
#endif
#ifndef _DES_NOPROTO
STATIC int fcrypt_body(DES_LONG *out0, DES_LONG *out1,
des_key_schedule ks, DES_LONG Eswap0, DES_LONG Eswap1);
#else
STATIC int fcrypt_body();
#endif
/* Added more values to handle illegal salt values the way normal
* crypt() implementations do. The patch was sent by
* Bjorn Gronvall <bg@sics.se>
*/
static unsigned const char con_salt[128]={
0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
};
static unsigned const char cov_2char[64]={
0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
};
#ifndef _DES_NOPROTO
char *des_crypt(const char *buf,const char *salt);
#else
char *des_crypt();
#endif
char *des_crypt(buf,salt)
const char *buf;
const char *salt;
{
static char buff[14];
return(des_fcrypt(buf,salt,buff));
}
char *des_fcrypt(buf,salt,ret)
const char *buf;
const char *salt;
char *ret;
{
unsigned int i,j,x,y;
DES_LONG Eswap0,Eswap1;
DES_LONG out[2],ll;
des_cblock key;
des_key_schedule ks;
unsigned char bb[9];
unsigned char *b=bb;
unsigned char c,u;
/* eay 25/08/92
* If you call des_crypt("pwd","*") as often happens when you
* have * as the pwd field in /etc/passwd, the function
* returns *\0XXXXXXXXX
* The \0 makes the string look like * so the pwd "*" would
* crypt to "*". This was found when replacing the crypt in
* our shared libraries. People found that the disbled
* accounts effectivly had no passwd :-(. */
x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
Eswap0=con_salt[x]<<2;
x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
Eswap1=con_salt[x]<<6;
/* EAY
r=strlen(buf);
r=(r+7)/8;
*/
for (i=0; i<8; i++)
{
c= *(buf++);
if (!c) break;
key[i]=(c<<1);
}
for (; i<8; i++)
key[i]=0;
des_set_key((des_cblock *)(key),ks);
fcrypt_body(&(out[0]),&(out[1]),ks,Eswap0,Eswap1);
ll=out[0]; l2c(ll,b);
ll=out[1]; l2c(ll,b);
y=0;
u=0x80;
bb[8]=0;
for (i=2; i<13; i++)
{
c=0;
for (j=0; j<6; j++)
{
c<<=1;
if (bb[y] & u) c|=1;
u>>=1;
if (!u)
{
y++;
u=0x80;
}
}
ret[i]=cov_2char[c];
}
ret[13]='\0';
return(ret);
}
STATIC int fcrypt_body(out0, out1, ks, Eswap0, Eswap1)
DES_LONG *out0;
DES_LONG *out1;
des_key_schedule ks;
DES_LONG Eswap0;
DES_LONG Eswap1;
{
register DES_LONG l,r,t,u;
#ifdef DES_PTR
register unsigned char *des_SP=(unsigned char *)des_SPtrans;
#endif
register DES_LONG *s;
register int j;
register DES_LONG E0,E1;
l=0;
r=0;
s=(DES_LONG *)ks;
E0=Eswap0;
E1=Eswap1;
for (j=0; j<25; j++)
{
#ifdef DES_UNROLL
register int i;
for (i=0; i<32; i+=8)
{
D_ENCRYPT(l,r,i+0); /* 1 */
D_ENCRYPT(r,l,i+2); /* 2 */
D_ENCRYPT(l,r,i+4); /* 3 */
D_ENCRYPT(r,l,i+6); /* 4 */
}
#else
D_ENCRYPT(l,r, 0); /* 1 */
D_ENCRYPT(r,l, 2); /* 2 */
D_ENCRYPT(l,r, 4); /* 3 */
D_ENCRYPT(r,l, 6); /* 4 */
D_ENCRYPT(l,r, 8); /* 5 */
D_ENCRYPT(r,l,10); /* 6 */
D_ENCRYPT(l,r,12); /* 7 */
D_ENCRYPT(r,l,14); /* 8 */
D_ENCRYPT(l,r,16); /* 9 */
D_ENCRYPT(r,l,18); /* 10 */
D_ENCRYPT(l,r,20); /* 11 */
D_ENCRYPT(r,l,22); /* 12 */
D_ENCRYPT(l,r,24); /* 13 */
D_ENCRYPT(r,l,26); /* 14 */
D_ENCRYPT(l,r,28); /* 15 */
D_ENCRYPT(r,l,30); /* 16 */
#endif
t=l;
l=r;
r=t;
}
l=ROTATE(l,3)&0xffffffffL;
r=ROTATE(r,3)&0xffffffffL;
PERM_OP(l,r,t, 1,0x55555555L);
PERM_OP(r,l,t, 8,0x00ff00ffL);
PERM_OP(l,r,t, 2,0x33333333L);
PERM_OP(r,l,t,16,0x0000ffffL);
PERM_OP(l,r,t, 4,0x0f0f0f0fL);
*out0=r;
*out1=l;
return(0);
}