| 1 | /*
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| 2 | * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #ifdef OPENSSL_SYS_WIN32
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| 11 | # include <stdlib.h>
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| 12 | #endif
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| 13 |
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| 14 | #undef c2l
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| 15 | #define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
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| 16 | l|=((unsigned long)(*((c)++)))<< 8L, \
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| 17 | l|=((unsigned long)(*((c)++)))<<16L, \
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| 18 | l|=((unsigned long)(*((c)++)))<<24L)
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| 19 |
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| 20 | /* NOTE - c is not incremented as per c2l */
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| 21 | #undef c2ln
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| 22 | #define c2ln(c,l1,l2,n) { \
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| 23 | c+=n; \
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| 24 | l1=l2=0; \
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| 25 | switch (n) { \
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| 26 | case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
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| 27 | case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
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| 28 | case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
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| 29 | case 5: l2|=((unsigned long)(*(--(c)))); \
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| 30 | case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
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| 31 | case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
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| 32 | case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
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| 33 | case 1: l1|=((unsigned long)(*(--(c)))); \
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| 34 | } \
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| 35 | }
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| 36 |
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| 37 | #undef l2c
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| 38 | #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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| 39 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
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| 40 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
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| 41 | *((c)++)=(unsigned char)(((l)>>24L)&0xff))
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| 42 |
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| 43 | /* NOTE - c is not incremented as per l2c */
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| 44 | #undef l2cn
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| 45 | #define l2cn(l1,l2,c,n) { \
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| 46 | c+=n; \
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| 47 | switch (n) { \
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| 48 | case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
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| 49 | case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
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| 50 | case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
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| 51 | case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
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| 52 | case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
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| 53 | case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
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| 54 | case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
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| 55 | case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
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| 56 | } \
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| 57 | }
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| 58 |
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| 59 | /* NOTE - c is not incremented as per n2l */
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| 60 | #define n2ln(c,l1,l2,n) { \
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| 61 | c+=n; \
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| 62 | l1=l2=0; \
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| 63 | switch (n) { \
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| 64 | case 8: l2 =((unsigned long)(*(--(c)))) ; \
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| 65 | /* fall through */ \
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| 66 | case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
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| 67 | /* fall through */ \
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| 68 | case 6: l2|=((unsigned long)(*(--(c))))<<16; \
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| 69 | /* fall through */ \
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| 70 | case 5: l2|=((unsigned long)(*(--(c))))<<24; \
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| 71 | /* fall through */ \
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| 72 | case 4: l1 =((unsigned long)(*(--(c)))) ; \
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| 73 | /* fall through */ \
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| 74 | case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
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| 75 | /* fall through */ \
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| 76 | case 2: l1|=((unsigned long)(*(--(c))))<<16; \
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| 77 | /* fall through */ \
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| 78 | case 1: l1|=((unsigned long)(*(--(c))))<<24; \
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| 79 | } \
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| 80 | }
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| 81 |
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| 82 | /* NOTE - c is not incremented as per l2n */
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| 83 | #define l2nn(l1,l2,c,n) { \
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| 84 | c+=n; \
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| 85 | switch (n) { \
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| 86 | case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
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| 87 | /* fall through */ \
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| 88 | case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
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| 89 | /* fall through */ \
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| 90 | case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
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| 91 | /* fall through */ \
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| 92 | case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
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| 93 | /* fall through */ \
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| 94 | case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
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| 95 | /* fall through */ \
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| 96 | case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
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| 97 | /* fall through */ \
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| 98 | case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
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| 99 | /* fall through */ \
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| 100 | case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
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| 101 | } \
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| 102 | }
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| 103 |
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| 104 | #undef n2l
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| 105 | #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
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| 106 | l|=((unsigned long)(*((c)++)))<<16L, \
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| 107 | l|=((unsigned long)(*((c)++)))<< 8L, \
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| 108 | l|=((unsigned long)(*((c)++))))
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| 109 |
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| 110 | #undef l2n
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| 111 | #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
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| 112 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
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| 113 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
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| 114 | *((c)++)=(unsigned char)(((l) )&0xff))
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| 115 |
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| 116 | #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
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| 117 | # define ROTL(a,n) (_lrotl(a,n))
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| 118 | #else
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| 119 | # define ROTL(a,n) ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
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| 120 | #endif
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| 121 |
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| 122 | #define C_M 0x3fc
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| 123 | #define C_0 22L
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| 124 | #define C_1 14L
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| 125 | #define C_2 6L
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| 126 | #define C_3 2L /* left shift */
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| 127 |
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| 128 | /* The rotate has an extra 16 added to it to help the x86 asm */
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| 129 | #if defined(CAST_PTR)
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| 130 | # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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| 131 | { \
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| 132 | int i; \
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| 133 | t=(key[n*2] OP1 R)&0xffffffffL; \
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| 134 | i=key[n*2+1]; \
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| 135 | t=ROTL(t,i); \
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| 136 | L^= (((((*(CAST_LONG *)((unsigned char *) \
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| 137 | CAST_S_table0+((t>>C_2)&C_M)) OP2 \
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| 138 | *(CAST_LONG *)((unsigned char *) \
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| 139 | CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
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| 140 | *(CAST_LONG *)((unsigned char *) \
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| 141 | CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
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| 142 | *(CAST_LONG *)((unsigned char *) \
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| 143 | CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
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| 144 | }
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| 145 | #elif defined(CAST_PTR2)
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| 146 | # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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| 147 | { \
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| 148 | int i; \
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| 149 | CAST_LONG u,v,w; \
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| 150 | w=(key[n*2] OP1 R)&0xffffffffL; \
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| 151 | i=key[n*2+1]; \
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| 152 | w=ROTL(w,i); \
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| 153 | u=w>>C_2; \
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| 154 | v=w<<C_3; \
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| 155 | u&=C_M; \
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| 156 | v&=C_M; \
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| 157 | t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
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| 158 | u=w>>C_0; \
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| 159 | t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
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| 160 | v=w>>C_1; \
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| 161 | u&=C_M; \
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| 162 | v&=C_M; \
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| 163 | t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
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| 164 | t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
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| 165 | L^=(t&0xffffffff); \
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| 166 | }
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| 167 | #else
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| 168 | # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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| 169 | { \
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| 170 | CAST_LONG a,b,c,d; \
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| 171 | t=(key[n*2] OP1 R)&0xffffffff; \
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| 172 | t=ROTL(t,(key[n*2+1])); \
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| 173 | a=CAST_S_table0[(t>> 8)&0xff]; \
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| 174 | b=CAST_S_table1[(t )&0xff]; \
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| 175 | c=CAST_S_table2[(t>>24)&0xff]; \
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| 176 | d=CAST_S_table3[(t>>16)&0xff]; \
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| 177 | L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
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| 178 | }
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| 179 | #endif
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| 180 |
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| 181 | extern const CAST_LONG CAST_S_table0[256];
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| 182 | extern const CAST_LONG CAST_S_table1[256];
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| 183 | extern const CAST_LONG CAST_S_table2[256];
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| 184 | extern const CAST_LONG CAST_S_table3[256];
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| 185 | extern const CAST_LONG CAST_S_table4[256];
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| 186 | extern const CAST_LONG CAST_S_table5[256];
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| 187 | extern const CAST_LONG CAST_S_table6[256];
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| 188 | extern const CAST_LONG CAST_S_table7[256];
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