]>
Commit | Line | Data |
---|---|---|
2039c421 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
0f113f3e | 3 | * |
2039c421 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
0f113f3e MC |
10 | /* |
11 | * The new form of this macro (check if the a*b == 0) was suggested by Colin | |
12 | * Plumb <colin@nyx10.cs.du.edu> | |
13 | */ | |
d02b48c6 RE |
14 | /* Removal of the inner if from from Wei Dai 24/4/96 */ |
15 | #define idea_mul(r,a,b,ul) \ | |
16 | ul=(unsigned long)a*b; \ | |
17 | if (ul != 0) \ | |
0f113f3e MC |
18 | { \ |
19 | r=(ul&0xffff)-(ul>>16); \ | |
20 | r-=((r)>>16); \ | |
21 | } \ | |
d02b48c6 | 22 | else \ |
0f113f3e | 23 | r=(-(int)a-b+1); /* assuming a or b is 0 and in range */ |
d02b48c6 | 24 | |
0f113f3e MC |
25 | /* |
26 | * 7/12/95 - Many thanks to Rhys Weatherley <rweather@us.oracle.com> for | |
27 | * pointing out that I was assuming little endian byte order for all | |
28 | * quantities what idea actually used bigendian. No where in the spec does | |
29 | * it mention this, it is all in terms of 16 bit numbers and even the example | |
30 | * does not use byte streams for the input example :-(. If you byte swap each | |
31 | * pair of input, keys and iv, the functions would produce the output as the | |
32 | * old version :-(. | |
d02b48c6 RE |
33 | */ |
34 | ||
35 | /* NOTE - c is not incremented as per n2l */ | |
0f113f3e MC |
36 | #define n2ln(c,l1,l2,n) { \ |
37 | c+=n; \ | |
38 | l1=l2=0; \ | |
39 | switch (n) { \ | |
40 | case 8: l2 =((unsigned long)(*(--(c)))) ; \ | |
41 | case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ | |
42 | case 6: l2|=((unsigned long)(*(--(c))))<<16; \ | |
43 | case 5: l2|=((unsigned long)(*(--(c))))<<24; \ | |
44 | case 4: l1 =((unsigned long)(*(--(c)))) ; \ | |
45 | case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ | |
46 | case 2: l1|=((unsigned long)(*(--(c))))<<16; \ | |
47 | case 1: l1|=((unsigned long)(*(--(c))))<<24; \ | |
48 | } \ | |
49 | } | |
d02b48c6 RE |
50 | |
51 | /* NOTE - c is not incremented as per l2n */ | |
0f113f3e MC |
52 | #define l2nn(l1,l2,c,n) { \ |
53 | c+=n; \ | |
54 | switch (n) { \ | |
55 | case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \ | |
56 | case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ | |
57 | case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ | |
58 | case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ | |
59 | case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \ | |
60 | case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ | |
61 | case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ | |
62 | case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ | |
63 | } \ | |
64 | } | |
d02b48c6 RE |
65 | |
66 | #undef n2l | |
67 | #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ | |
68 | l|=((unsigned long)(*((c)++)))<<16L, \ | |
69 | l|=((unsigned long)(*((c)++)))<< 8L, \ | |
70 | l|=((unsigned long)(*((c)++)))) | |
71 | ||
72 | #undef l2n | |
73 | #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ | |
74 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ | |
75 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ | |
76 | *((c)++)=(unsigned char)(((l) )&0xff)) | |
77 | ||
78 | #undef s2n | |
0f113f3e MC |
79 | #define s2n(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ |
80 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff)) | |
d02b48c6 RE |
81 | |
82 | #undef n2s | |
0f113f3e MC |
83 | #define n2s(c,l) (l =((IDEA_INT)(*((c)++)))<< 8L, \ |
84 | l|=((IDEA_INT)(*((c)++))) ) | |
d02b48c6 | 85 | |
58964a49 RE |
86 | |
87 | #define E_IDEA(num) \ | |
0f113f3e MC |
88 | x1&=0xffff; \ |
89 | idea_mul(x1,x1,*p,ul); p++; \ | |
90 | x2+= *(p++); \ | |
91 | x3+= *(p++); \ | |
92 | x4&=0xffff; \ | |
93 | idea_mul(x4,x4,*p,ul); p++; \ | |
94 | t0=(x1^x3)&0xffff; \ | |
95 | idea_mul(t0,t0,*p,ul); p++; \ | |
96 | t1=(t0+(x2^x4))&0xffff; \ | |
97 | idea_mul(t1,t1,*p,ul); p++; \ | |
98 | t0+=t1; \ | |
99 | x1^=t1; \ | |
100 | x4^=t0; \ | |
101 | ul=x2^t0; /* do the swap to x3 */ \ | |
102 | x2=x3^t1; \ | |
103 | x3=ul; |