1 /* 2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #ifdef OPENSSL_SYS_WIN32 11 # include <stdlib.h> 12 #endif 13 14 /* NOTE - c is not incremented as per n2l */ 15 #define n2ln(c,l1,l2,n) { \ 16 c+=n; \ 17 l1=l2=0; \ 18 switch (n) { \ 19 case 8: l2 =((unsigned long)(*(--(c)))) ; \ 20 /* fall through */ \ 21 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ 22 /* fall through */ \ 23 case 6: l2|=((unsigned long)(*(--(c))))<<16; \ 24 /* fall through */ \ 25 case 5: l2|=((unsigned long)(*(--(c))))<<24; \ 26 /* fall through */ \ 27 case 4: l1 =((unsigned long)(*(--(c)))) ; \ 28 /* fall through */ \ 29 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ 30 /* fall through */ \ 31 case 2: l1|=((unsigned long)(*(--(c))))<<16; \ 32 /* fall through */ \ 33 case 1: l1|=((unsigned long)(*(--(c))))<<24; \ 34 } \ 35 } 36 37 /* NOTE - c is not incremented as per l2n */ 38 #define l2nn(l1,l2,c,n) { \ 39 c+=n; \ 40 switch (n) { \ 41 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \ 42 /* fall through */ \ 43 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ 44 /* fall through */ \ 45 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ 46 /* fall through */ \ 47 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ 48 /* fall through */ \ 49 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \ 50 /* fall through */ \ 51 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ 52 /* fall through */ \ 53 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ 54 /* fall through */ \ 55 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ 56 } \ 57 } 58 59 #undef n2l 60 #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ 61 l|=((unsigned long)(*((c)++)))<<16L, \ 62 l|=((unsigned long)(*((c)++)))<< 8L, \ 63 l|=((unsigned long)(*((c)++)))) 64 65 #undef l2n 66 #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 67 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 68 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 69 *((c)++)=(unsigned char)(((l) )&0xff)) 70 71 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER) 72 # define ROTL(a,n) (_lrotl(a,n)) 73 #else 74 # define ROTL(a,n) ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31))) 75 #endif 76 77 #define C_M 0x3fc 78 #define C_0 22L 79 #define C_1 14L 80 #define C_2 6L 81 #define C_3 2L /* left shift */ 82 83 /* The rotate has an extra 16 added to it to help the x86 asm */ 84 #if defined(CAST_PTR) 85 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \ 86 { \ 87 int i; \ 88 t=(key[n*2] OP1 R)&0xffffffffL; \ 89 i=key[n*2+1]; \ 90 t=ROTL(t,i); \ 91 L^= (((((*(CAST_LONG *)((unsigned char *) \ 92 CAST_S_table0+((t>>C_2)&C_M)) OP2 \ 93 *(CAST_LONG *)((unsigned char *) \ 94 CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \ 95 *(CAST_LONG *)((unsigned char *) \ 96 CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \ 97 *(CAST_LONG *)((unsigned char *) \ 98 CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \ 99 } 100 #elif defined(CAST_PTR2) 101 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \ 102 { \ 103 int i; \ 104 CAST_LONG u,v,w; \ 105 w=(key[n*2] OP1 R)&0xffffffffL; \ 106 i=key[n*2+1]; \ 107 w=ROTL(w,i); \ 108 u=w>>C_2; \ 109 v=w<<C_3; \ 110 u&=C_M; \ 111 v&=C_M; \ 112 t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \ 113 u=w>>C_0; \ 114 t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\ 115 v=w>>C_1; \ 116 u&=C_M; \ 117 v&=C_M; \ 118 t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\ 119 t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\ 120 L^=(t&0xffffffff); \ 121 } 122 #else 123 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \ 124 { \ 125 CAST_LONG a,b,c,d; \ 126 t=(key[n*2] OP1 R)&0xffffffff; \ 127 t=ROTL(t,(key[n*2+1])); \ 128 a=CAST_S_table0[(t>> 8)&0xff]; \ 129 b=CAST_S_table1[(t )&0xff]; \ 130 c=CAST_S_table2[(t>>24)&0xff]; \ 131 d=CAST_S_table3[(t>>16)&0xff]; \ 132 L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \ 133 } 134 #endif 135 136 extern const CAST_LONG CAST_S_table0[256]; 137 extern const CAST_LONG CAST_S_table1[256]; 138 extern const CAST_LONG CAST_S_table2[256]; 139 extern const CAST_LONG CAST_S_table3[256]; 140 extern const CAST_LONG CAST_S_table4[256]; 141 extern const CAST_LONG CAST_S_table5[256]; 142 extern const CAST_LONG CAST_S_table6[256]; 143 extern const CAST_LONG CAST_S_table7[256]; 144
