Add a warning stipulating how things should be coded in ossl_init_base
[openssl.git] / crypto / bf / bf_locl.h
1 /*
2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (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 HEADER_BF_LOCL_H
11 # define HEADER_BF_LOCL_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                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
21                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
22                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
23                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
24                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
25                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
26                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
27                                 } \
28                         }
29
30 /* NOTE - c is not incremented as per l2n */
31 # define l2nn(l1,l2,c,n) { \
32                         c+=n; \
33                         switch (n) { \
34                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
35                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
36                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
37                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
38                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
39                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
40                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
41                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
42                                 } \
43                         }
44
45 # undef n2l
46 # define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
47                          l|=((unsigned long)(*((c)++)))<<16L, \
48                          l|=((unsigned long)(*((c)++)))<< 8L, \
49                          l|=((unsigned long)(*((c)++))))
50
51 # undef l2n
52 # define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
53                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
54                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
55                          *((c)++)=(unsigned char)(((l)     )&0xff))
56
57 /*
58  * This is actually a big endian algorithm, the most significant byte is used
59  * to lookup array 0
60  */
61
62 # define BF_ENC(LL,R,S,P) ( \
63         LL^=P, \
64         LL^=((( S[       ((R>>24)&0xff)] + \
65                 S[0x0100+((R>>16)&0xff)])^ \
66                 S[0x0200+((R>> 8)&0xff)])+ \
67                 S[0x0300+((R    )&0xff)])&0xffffffffU \
68         )
69
70 #endif