1 | /* |
2 | * Copyright 1995-2016 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 | #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; |
103 | |