bf_locl.h
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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef HEADER_BF_LOCL_H
# define HEADER_BF_LOCL_H
# include <openssl/opensslconf.h>
/* NOTE - c is not incremented as per n2l */
# define n2ln(c,l1,l2,n) { \
c+=n; \
l1=l2=0; \
switch (n) { \
case 8: l2 =((unsigned long)(*(--(c)))) ; \
/* fall thru */ \
case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
/* fall thru */ \
case 6: l2|=((unsigned long)(*(--(c))))<<16; \
/* fall thru */ \
case 5: l2|=((unsigned long)(*(--(c))))<<24; \
/* fall thru */ \
case 4: l1 =((unsigned long)(*(--(c)))) ; \
/* fall thru */ \
case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
/* fall thru */ \
case 2: l1|=((unsigned long)(*(--(c))))<<16; \
/* fall thru */ \
case 1: l1|=((unsigned long)(*(--(c))))<<24; \
} \
}
/* NOTE - c is not incremented as per l2n */
# define l2nn(l1,l2,c,n) { \
c+=n; \
switch (n) { \
case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
/* fall thru */ \
case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
/* fall thru */ \
case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
/* fall thru */ \
case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
/* fall thru */ \
case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
/* fall thru */ \
case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
/* fall thru */ \
case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
/* fall thru */ \
case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
} \
}
# undef n2l
# define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
l|=((unsigned long)(*((c)++)))<<16L, \
l|=((unsigned long)(*((c)++)))<< 8L, \
l|=((unsigned long)(*((c)++))))
# undef l2n
# define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
*((c)++)=(unsigned char)(((l) )&0xff))
/*
* This is actually a big endian algorithm, the most significant byte is used
* to lookup array 0
*/
# define BF_ENC(LL,R,S,P) ( \
LL^=P, \
LL^=((( S[ ((R>>24)&0xff)] + \
S[0x0100+((R>>16)&0xff)])^ \
S[0x0200+((R>> 8)&0xff)])+ \
S[0x0300+((R )&0xff)])&0xffffffffU \
)
#endif