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1/* $OpenBSD: rc5_locl.h,v 1.6 2014/08/18 19:15:34 bcook Exp $ */
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#include <stdint.h>
60#include <stdlib.h>
61
62#include <openssl/opensslconf.h>
63
64#undef c2l
65#define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
66 l|=((unsigned long)(*((c)++)))<< 8L, \
67 l|=((unsigned long)(*((c)++)))<<16L, \
68 l|=((unsigned long)(*((c)++)))<<24L)
69
70/* NOTE - c is not incremented as per c2l */
71#undef c2ln
72#define c2ln(c,l1,l2,n) { \
73 c+=n; \
74 l1=l2=0; \
75 switch (n) { \
76 case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
77 case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
78 case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
79 case 5: l2|=((unsigned long)(*(--(c)))); \
80 case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
81 case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
82 case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
83 case 1: l1|=((unsigned long)(*(--(c)))); \
84 } \
85 }
86
87#undef l2c
88#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
89 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
90 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
91 *((c)++)=(unsigned char)(((l)>>24L)&0xff))
92
93/* NOTE - c is not incremented as per l2c */
94#undef l2cn
95#define l2cn(l1,l2,c,n) { \
96 c+=n; \
97 switch (n) { \
98 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
99 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
100 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
101 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
102 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
103 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
104 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
105 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
106 } \
107 }
108
109/* NOTE - c is not incremented as per n2l */
110#define n2ln(c,l1,l2,n) { \
111 c+=n; \
112 l1=l2=0; \
113 switch (n) { \
114 case 8: l2 =((unsigned long)(*(--(c)))) ; \
115 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
116 case 6: l2|=((unsigned long)(*(--(c))))<<16; \
117 case 5: l2|=((unsigned long)(*(--(c))))<<24; \
118 case 4: l1 =((unsigned long)(*(--(c)))) ; \
119 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
120 case 2: l1|=((unsigned long)(*(--(c))))<<16; \
121 case 1: l1|=((unsigned long)(*(--(c))))<<24; \
122 } \
123 }
124
125/* NOTE - c is not incremented as per l2n */
126#define l2nn(l1,l2,c,n) { \
127 c+=n; \
128 switch (n) { \
129 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
130 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
131 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
132 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
133 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
134 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
135 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
136 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
137 } \
138 }
139
140#undef n2l
141#define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
142 l|=((unsigned long)(*((c)++)))<<16L, \
143 l|=((unsigned long)(*((c)++)))<< 8L, \
144 l|=((unsigned long)(*((c)++))))
145
146#undef l2n
147#define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
148 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
149 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
150 *((c)++)=(unsigned char)(((l) )&0xff))
151
152static inline uint32_t ROTATE_l32(uint32_t a, uint32_t n)
153{
154 uint32_t amt = n & 0x1f;
155 return (a << amt) | (a >> (32 - amt));
156}
157
158static inline uint32_t ROTATE_r32(uint32_t a, uint32_t n)
159{
160 uint32_t amt = n & 0x1f;
161 return (a << (32 - amt)) | (a >> amt);
162}
163
164#define RC5_32_MASK 0xffffffffL
165
166#define RC5_16_P 0xB7E1
167#define RC5_16_Q 0x9E37
168#define RC5_32_P 0xB7E15163L
169#define RC5_32_Q 0x9E3779B9L
170#define RC5_64_P 0xB7E151628AED2A6BLL
171#define RC5_64_Q 0x9E3779B97F4A7C15LL
172
173#define E_RC5_32(a,b,s,n) \
174 a^=b; \
175 a=ROTATE_l32(a,b); \
176 a+=s[n]; \
177 a&=RC5_32_MASK; \
178 b^=a; \
179 b=ROTATE_l32(b,a); \
180 b+=s[n+1]; \
181 b&=RC5_32_MASK;
182
183#define D_RC5_32(a,b,s,n) \
184 b-=s[n+1]; \
185 b&=RC5_32_MASK; \
186 b=ROTATE_r32(b,a); \
187 b^=a; \
188 a-=s[n]; \
189 a&=RC5_32_MASK; \
190 a=ROTATE_r32(a,b); \
191 a^=b;
192
193
194
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