173 lines
5.4 KiB
C
173 lines
5.4 KiB
C
/* crypto/des/str2key.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* 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@cryptsoft.com).
|
|
*
|
|
* 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@cryptsoft.com)"
|
|
* 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@cryptsoft.com)"
|
|
*
|
|
* 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 "des_locl.h"
|
|
|
|
void DES_string_to_key(const char *str, DES_cblock *key)
|
|
{
|
|
DES_key_schedule ks;
|
|
int i,length;
|
|
register unsigned char j;
|
|
|
|
memset(key,0,8);
|
|
length=strlen(str);
|
|
#ifdef OLD_STR_TO_KEY
|
|
for (i=0; i<length; i++)
|
|
(*key)[i%8]^=(str[i]<<1);
|
|
#else /* MIT COMPATIBLE */
|
|
for (i=0; i<length; i++)
|
|
{
|
|
j=str[i];
|
|
if ((i%16) < 8)
|
|
(*key)[i%8]^=(j<<1);
|
|
else
|
|
{
|
|
/* Reverse the bit order 05/05/92 eay */
|
|
j=((j<<4)&0xf0)|((j>>4)&0x0f);
|
|
j=((j<<2)&0xcc)|((j>>2)&0x33);
|
|
j=((j<<1)&0xaa)|((j>>1)&0x55);
|
|
(*key)[7-(i%8)]^=j;
|
|
}
|
|
}
|
|
#endif
|
|
DES_set_odd_parity(key);
|
|
#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
|
|
if(DES_is_weak_key(key))
|
|
(*key)[7] ^= 0xF0;
|
|
DES_set_key(key,&ks);
|
|
#else
|
|
DES_set_key_unchecked(key,&ks);
|
|
#endif
|
|
DES_cbc_cksum((const unsigned char*)str,key,length,&ks,key);
|
|
OPENSSL_cleanse(&ks,sizeof(ks));
|
|
DES_set_odd_parity(key);
|
|
}
|
|
|
|
void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2)
|
|
{
|
|
DES_key_schedule ks;
|
|
int i,length;
|
|
register unsigned char j;
|
|
|
|
memset(key1,0,8);
|
|
memset(key2,0,8);
|
|
length=strlen(str);
|
|
#ifdef OLD_STR_TO_KEY
|
|
if (length <= 8)
|
|
{
|
|
for (i=0; i<length; i++)
|
|
{
|
|
(*key2)[i]=(*key1)[i]=(str[i]<<1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (i=0; i<length; i++)
|
|
{
|
|
if ((i/8)&1)
|
|
(*key2)[i%8]^=(str[i]<<1);
|
|
else
|
|
(*key1)[i%8]^=(str[i]<<1);
|
|
}
|
|
}
|
|
#else /* MIT COMPATIBLE */
|
|
for (i=0; i<length; i++)
|
|
{
|
|
j=str[i];
|
|
if ((i%32) < 16)
|
|
{
|
|
if ((i%16) < 8)
|
|
(*key1)[i%8]^=(j<<1);
|
|
else
|
|
(*key2)[i%8]^=(j<<1);
|
|
}
|
|
else
|
|
{
|
|
j=((j<<4)&0xf0)|((j>>4)&0x0f);
|
|
j=((j<<2)&0xcc)|((j>>2)&0x33);
|
|
j=((j<<1)&0xaa)|((j>>1)&0x55);
|
|
if ((i%16) < 8)
|
|
(*key1)[7-(i%8)]^=j;
|
|
else
|
|
(*key2)[7-(i%8)]^=j;
|
|
}
|
|
}
|
|
if (length <= 8) memcpy(key2,key1,8);
|
|
#endif
|
|
DES_set_odd_parity(key1);
|
|
DES_set_odd_parity(key2);
|
|
#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
|
|
if(DES_is_weak_key(key1))
|
|
(*key1)[7] ^= 0xF0;
|
|
DES_set_key(key1,&ks);
|
|
#else
|
|
DES_set_key_unchecked(key1,&ks);
|
|
#endif
|
|
DES_cbc_cksum((const unsigned char*)str,key1,length,&ks,key1);
|
|
#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
|
|
if(DES_is_weak_key(key2))
|
|
(*key2)[7] ^= 0xF0;
|
|
DES_set_key(key2,&ks);
|
|
#else
|
|
DES_set_key_unchecked(key2,&ks);
|
|
#endif
|
|
DES_cbc_cksum((const unsigned char*)str,key2,length,&ks,key2);
|
|
OPENSSL_cleanse(&ks,sizeof(ks));
|
|
DES_set_odd_parity(key1);
|
|
DES_set_odd_parity(key2);
|
|
}
|