1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #ifndef OSSL_CRYPTO_BF_LOCAL_H 11 # define OSSL_CRYPTO_BF_LOCAL_H 12 # include <openssl/opensslconf.h> 13 14 /* NOTE - c is not incremented as per n2l */ 15 # define n2ln(c,l1,l2,n) { \ 16 c+=n; \ 17 l1=l2=0; \ 18 switch (n) { \ 19 case 8: l2 =((unsigned long)(*(--(c)))) ; \ 20 /* fall thru */ \ 21 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ 22 /* fall thru */ \ 23 case 6: l2|=((unsigned long)(*(--(c))))<<16; \ 24 /* fall thru */ \ 25 case 5: l2|=((unsigned long)(*(--(c))))<<24; \ 26 /* fall thru */ \ 27 case 4: l1 =((unsigned long)(*(--(c)))) ; \ 28 /* fall thru */ \ 29 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ 30 /* fall thru */ \ 31 case 2: l1|=((unsigned long)(*(--(c))))<<16; \ 32 /* fall thru */ \ 33 case 1: l1|=((unsigned long)(*(--(c))))<<24; \ 34 } \ 35 } 36 37 /* NOTE - c is not incremented as per l2n */ 38 # define l2nn(l1,l2,c,n) { \ 39 c+=n; \ 40 switch (n) { \ 41 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \ 42 /* fall thru */ \ 43 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ 44 /* fall thru */ \ 45 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ 46 /* fall thru */ \ 47 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ 48 /* fall thru */ \ 49 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \ 50 /* fall thru */ \ 51 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ 52 /* fall thru */ \ 53 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ 54 /* fall thru */ \ 55 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ 56 } \ 57 } 58 59 # undef n2l 60 # define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ 61 l|=((unsigned long)(*((c)++)))<<16L, \ 62 l|=((unsigned long)(*((c)++)))<< 8L, \ 63 l|=((unsigned long)(*((c)++)))) 64 65 # undef l2n 66 # define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 67 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 68 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 69 *((c)++)=(unsigned char)(((l) )&0xff)) 70 71 /* 72 * This is actually a big endian algorithm, the most significant byte is used 73 * to lookup array 0 74 */ 75 76 # define BF_ENC(LL,R,S,P) ( \ 77 LL^=P, \ 78 LL^=((( S[ ((R>>24)&0xff)] + \ 79 S[0x0100+((R>>16)&0xff)])^ \ 80 S[0x0200+((R>> 8)&0xff)])+ \ 81 S[0x0300+((R )&0xff)])&0xffffffffU \ 82 ) 83 84 #endif 85