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1/* crypto/cast/cast_lcl.h */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59
60#include "e_os.h"
61
62#ifdef OPENSSL_SYS_WIN32
63#include <stdlib.h>
64#endif
65
66
67#undef c2l
68#define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
69 l|=((unsigned long)(*((c)++)))<< 8L, \
70 l|=((unsigned long)(*((c)++)))<<16L, \
71 l|=((unsigned long)(*((c)++)))<<24L)
72
73/* NOTE - c is not incremented as per c2l */
74#undef c2ln
75#define c2ln(c,l1,l2,n) { \
76 c+=n; \
77 l1=l2=0; \
78 switch (n) { \
79 case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
80 case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
81 case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
82 case 5: l2|=((unsigned long)(*(--(c)))); \
83 case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
84 case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
85 case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
86 case 1: l1|=((unsigned long)(*(--(c)))); \
87 } \
88 }
89
90#undef l2c
91#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
92 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
93 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
94 *((c)++)=(unsigned char)(((l)>>24L)&0xff))
95
96/* NOTE - c is not incremented as per l2c */
97#undef l2cn
98#define l2cn(l1,l2,c,n) { \
99 c+=n; \
100 switch (n) { \
101 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
102 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
103 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
104 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
105 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
106 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
107 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
108 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
109 } \
110 }
111
112/* NOTE - c is not incremented as per n2l */
113#define n2ln(c,l1,l2,n) { \
114 c+=n; \
115 l1=l2=0; \
116 switch (n) { \
117 case 8: l2 =((unsigned long)(*(--(c)))) ; \
118 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
119 case 6: l2|=((unsigned long)(*(--(c))))<<16; \
120 case 5: l2|=((unsigned long)(*(--(c))))<<24; \
121 case 4: l1 =((unsigned long)(*(--(c)))) ; \
122 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
123 case 2: l1|=((unsigned long)(*(--(c))))<<16; \
124 case 1: l1|=((unsigned long)(*(--(c))))<<24; \
125 } \
126 }
127
128/* NOTE - c is not incremented as per l2n */
129#define l2nn(l1,l2,c,n) { \
130 c+=n; \
131 switch (n) { \
132 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
133 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
134 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
135 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
136 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
137 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
138 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
139 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
140 } \
141 }
142
143#undef n2l
144#define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
145 l|=((unsigned long)(*((c)++)))<<16L, \
146 l|=((unsigned long)(*((c)++)))<< 8L, \
147 l|=((unsigned long)(*((c)++))))
148
149#undef l2n
150#define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
151 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
152 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
153 *((c)++)=(unsigned char)(((l) )&0xff))
154
155#if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
156#define ROTL(a,n) (_lrotl(a,n))
157#else
158#define ROTL(a,n) ((((a)<<(n))&0xffffffffL)|((a)>>(32-(n))))
159#endif
160
161#define C_M 0x3fc
162#define C_0 22L
163#define C_1 14L
164#define C_2 6L
165#define C_3 2L /* left shift */
166
167/* The rotate has an extra 16 added to it to help the x86 asm */
168#if defined(CAST_PTR)
169#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
170 { \
171 int i; \
172 t=(key[n*2] OP1 R)&0xffffffffL; \
173 i=key[n*2+1]; \
174 t=ROTL(t,i); \
175 L^= (((((*(CAST_LONG *)((unsigned char *) \
176 CAST_S_table0+((t>>C_2)&C_M)) OP2 \
177 *(CAST_LONG *)((unsigned char *) \
178 CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
179 *(CAST_LONG *)((unsigned char *) \
180 CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
181 *(CAST_LONG *)((unsigned char *) \
182 CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
183 }
184#elif defined(CAST_PTR2)
185#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
186 { \
187 int i; \
188 CAST_LONG u,v,w; \
189 w=(key[n*2] OP1 R)&0xffffffffL; \
190 i=key[n*2+1]; \
191 w=ROTL(w,i); \
192 u=w>>C_2; \
193 v=w<<C_3; \
194 u&=C_M; \
195 v&=C_M; \
196 t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
197 u=w>>C_0; \
198 t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
199 v=w>>C_1; \
200 u&=C_M; \
201 v&=C_M; \
202 t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
203 t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
204 L^=(t&0xffffffff); \
205 }
206#else
207#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
208 { \
209 CAST_LONG a,b,c,d; \
210 t=(key[n*2] OP1 R)&0xffffffff; \
211 t=ROTL(t,(key[n*2+1])); \
212 a=CAST_S_table0[(t>> 8)&0xff]; \
213 b=CAST_S_table1[(t )&0xff]; \
214 c=CAST_S_table2[(t>>24)&0xff]; \
215 d=CAST_S_table3[(t>>16)&0xff]; \
216 L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
217 }
218#endif
219
220extern const CAST_LONG CAST_S_table0[256];
221extern const CAST_LONG CAST_S_table1[256];
222extern const CAST_LONG CAST_S_table2[256];
223extern const CAST_LONG CAST_S_table3[256];
224extern const CAST_LONG CAST_S_table4[256];
225extern const CAST_LONG CAST_S_table5[256];
226extern const CAST_LONG CAST_S_table6[256];
227extern const CAST_LONG CAST_S_table7[256];
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