e756021a33dc3bc4fc50095255e90240947da74a
[openssl.git] / crypto / cast / cast_lcl.h
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
220 extern const CAST_LONG CAST_S_table0[256];
221 extern const CAST_LONG CAST_S_table1[256];
222 extern const CAST_LONG CAST_S_table2[256];
223 extern const CAST_LONG CAST_S_table3[256];
224 extern const CAST_LONG CAST_S_table4[256];
225 extern const CAST_LONG CAST_S_table5[256];
226 extern const CAST_LONG CAST_S_table6[256];
227 extern const CAST_LONG CAST_S_table7[256];