| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (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 | #define idea_mul(r,a,b,ul) \ |
| 11 | ul=(unsigned long)a*b; \ |
| 12 | if (ul != 0) \ |
| 13 | { \ |
| 14 | r=(ul&0xffff)-(ul>>16); \ |
| 15 | r-=((r)>>16); \ |
| 16 | } \ |
| 17 | else \ |
| 18 | r=(-(int)a-b+1); /* assuming a or b is 0 and in range */ |
| 19 | |
| 20 | /* NOTE - c is not incremented as per n2l */ |
| 21 | #define n2ln(c,l1,l2,n) { \ |
| 22 | c+=n; \ |
| 23 | l1=l2=0; \ |
| 24 | switch (n) { \ |
| 25 | case 8: l2 =((unsigned long)(*(--(c)))) ; \ |
| 26 | /* fall thru */ \ |
| 27 | case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ |
| 28 | /* fall thru */ \ |
| 29 | case 6: l2|=((unsigned long)(*(--(c))))<<16; \ |
| 30 | /* fall thru */ \ |
| 31 | case 5: l2|=((unsigned long)(*(--(c))))<<24; \ |
| 32 | /* fall thru */ \ |
| 33 | case 4: l1 =((unsigned long)(*(--(c)))) ; \ |
| 34 | /* fall thru */ \ |
| 35 | case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ |
| 36 | /* fall thru */ \ |
| 37 | case 2: l1|=((unsigned long)(*(--(c))))<<16; \ |
| 38 | /* fall thru */ \ |
| 39 | case 1: l1|=((unsigned long)(*(--(c))))<<24; \ |
| 40 | } \ |
| 41 | } |
| 42 | |
| 43 | /* NOTE - c is not incremented as per l2n */ |
| 44 | #define l2nn(l1,l2,c,n) { \ |
| 45 | c+=n; \ |
| 46 | switch (n) { \ |
| 47 | case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \ |
| 48 | /* fall thru */ \ |
| 49 | case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ |
| 50 | /* fall thru */ \ |
| 51 | case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ |
| 52 | /* fall thru */ \ |
| 53 | case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ |
| 54 | /* fall thru */ \ |
| 55 | case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \ |
| 56 | /* fall thru */ \ |
| 57 | case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ |
| 58 | /* fall thru */ \ |
| 59 | case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ |
| 60 | /* fall thru */ \ |
| 61 | case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ |
| 62 | } \ |
| 63 | } |
| 64 | |
| 65 | #undef n2l |
| 66 | #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ |
| 67 | l|=((unsigned long)(*((c)++)))<<16L, \ |
| 68 | l|=((unsigned long)(*((c)++)))<< 8L, \ |
| 69 | l|=((unsigned long)(*((c)++)))) |
| 70 | |
| 71 | #undef l2n |
| 72 | #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ |
| 73 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ |
| 74 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ |
| 75 | *((c)++)=(unsigned char)(((l) )&0xff)) |
| 76 | |
| 77 | #undef s2n |
| 78 | #define s2n(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ |
| 79 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff)) |
| 80 | |
| 81 | #undef n2s |
| 82 | #define n2s(c,l) (l =((IDEA_INT)(*((c)++)))<< 8L, \ |
| 83 | l|=((IDEA_INT)(*((c)++))) ) |
| 84 | |
| 85 | |
| 86 | #define E_IDEA(num) \ |
| 87 | x1&=0xffff; \ |
| 88 | idea_mul(x1,x1,*p,ul); p++; \ |
| 89 | x2+= *(p++); \ |
| 90 | x3+= *(p++); \ |
| 91 | x4&=0xffff; \ |
| 92 | idea_mul(x4,x4,*p,ul); p++; \ |
| 93 | t0=(x1^x3)&0xffff; \ |
| 94 | idea_mul(t0,t0,*p,ul); p++; \ |
| 95 | t1=(t0+(x2^x4))&0xffff; \ |
| 96 | idea_mul(t1,t1,*p,ul); p++; \ |
| 97 | t0+=t1; \ |
| 98 | x1^=t1; \ |
| 99 | x4^=t0; \ |
| 100 | ul=x2^t0; /* do the swap to x3 */ \ |
| 101 | x2=x3^t1; \ |
| 102 | x3=ul; |