rc2_locl.h revision 296465 
1/* crypto/rc2/rc2_locl.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#undef c2l
60#define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
61                         l|=((unsigned long)(*((c)++)))<< 8L, \
62                         l|=((unsigned long)(*((c)++)))<<16L, \
63                         l|=((unsigned long)(*((c)++)))<<24L)
64
65/* NOTE - c is not incremented as per c2l */
66#undef c2ln
67#define c2ln(c,l1,l2,n) { \
68                        c+=n; \
69                        l1=l2=0; \
70                        switch (n) { \
71                        case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
72                        case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
73                        case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
74                        case 5: l2|=((unsigned long)(*(--(c))));     \
75                        case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
76                        case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
77                        case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
78                        case 1: l1|=((unsigned long)(*(--(c))));     \
79                                } \
80                        }
81
82#undef l2c
83#define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
84                         *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
85                         *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
86                         *((c)++)=(unsigned char)(((l)>>24L)&0xff))
87
88/* NOTE - c is not incremented as per l2c */
89#undef l2cn
90#define l2cn(l1,l2,c,n) { \
91                        c+=n; \
92                        switch (n) { \
93                        case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
94                        case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
95                        case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
96                        case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
97                        case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
98                        case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
99                        case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
100                        case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
101                                } \
102                        }
103
104/* NOTE - c is not incremented as per n2l */
105#define n2ln(c,l1,l2,n) { \
106                        c+=n; \
107                        l1=l2=0; \
108                        switch (n) { \
109                        case 8: l2 =((unsigned long)(*(--(c))))    ; \
110                        case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
111                        case 6: l2|=((unsigned long)(*(--(c))))<<16; \
112                        case 5: l2|=((unsigned long)(*(--(c))))<<24; \
113                        case 4: l1 =((unsigned long)(*(--(c))))    ; \
114                        case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
115                        case 2: l1|=((unsigned long)(*(--(c))))<<16; \
116                        case 1: l1|=((unsigned long)(*(--(c))))<<24; \
117                                } \
118                        }
119
120/* NOTE - c is not incremented as per l2n */
121#define l2nn(l1,l2,c,n) { \
122                        c+=n; \
123                        switch (n) { \
124                        case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
125                        case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
126                        case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
127                        case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
128                        case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
129                        case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
130                        case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
131                        case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
132                                } \
133                        }
134
135#undef n2l
136#define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
137                         l|=((unsigned long)(*((c)++)))<<16L, \
138                         l|=((unsigned long)(*((c)++)))<< 8L, \
139                         l|=((unsigned long)(*((c)++))))
140
141#undef l2n
142#define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
143                         *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
144                         *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
145                         *((c)++)=(unsigned char)(((l)     )&0xff))
146
147#define C_RC2(n) \
148        t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; \
149        x0=(t<<1)|(t>>15); \
150        t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; \
151        x1=(t<<2)|(t>>14); \
152        t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; \
153        x2=(t<<3)|(t>>13); \
154        t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; \
155        x3=(t<<5)|(t>>11);
156