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2039c421 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
aa2d9a76 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
2039c421 RS |
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 | ||
da2d32f6 P |
10 | /* |
11 | * IDEA low level APIs are deprecated for public use, but still ok for internal | |
12 | * use where we're using them to implement the higher level EVP interface, as is | |
13 | * the case here. | |
14 | */ | |
15 | #include "internal/deprecated.h" | |
16 | ||
ec577822 | 17 | #include <openssl/idea.h> |
706457b7 | 18 | #include "idea_local.h" |
d02b48c6 | 19 | |
9021a5df | 20 | void IDEA_cbc_encrypt(const unsigned char *in, unsigned char *out, |
0f113f3e MC |
21 | long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, |
22 | int encrypt) | |
23 | { | |
24 | register unsigned long tin0, tin1; | |
25 | register unsigned long tout0, tout1, xor0, xor1; | |
26 | register long l = length; | |
27 | unsigned long tin[2]; | |
d02b48c6 | 28 | |
0f113f3e MC |
29 | if (encrypt) { |
30 | n2l(iv, tout0); | |
31 | n2l(iv, tout1); | |
32 | iv -= 8; | |
33 | for (l -= 8; l >= 0; l -= 8) { | |
34 | n2l(in, tin0); | |
35 | n2l(in, tin1); | |
36 | tin0 ^= tout0; | |
37 | tin1 ^= tout1; | |
38 | tin[0] = tin0; | |
39 | tin[1] = tin1; | |
9021a5df | 40 | IDEA_encrypt(tin, ks); |
0f113f3e MC |
41 | tout0 = tin[0]; |
42 | l2n(tout0, out); | |
43 | tout1 = tin[1]; | |
44 | l2n(tout1, out); | |
45 | } | |
46 | if (l != -8) { | |
47 | n2ln(in, tin0, tin1, l + 8); | |
48 | tin0 ^= tout0; | |
49 | tin1 ^= tout1; | |
50 | tin[0] = tin0; | |
51 | tin[1] = tin1; | |
9021a5df | 52 | IDEA_encrypt(tin, ks); |
0f113f3e MC |
53 | tout0 = tin[0]; |
54 | l2n(tout0, out); | |
55 | tout1 = tin[1]; | |
56 | l2n(tout1, out); | |
57 | } | |
58 | l2n(tout0, iv); | |
59 | l2n(tout1, iv); | |
60 | } else { | |
61 | n2l(iv, xor0); | |
62 | n2l(iv, xor1); | |
63 | iv -= 8; | |
64 | for (l -= 8; l >= 0; l -= 8) { | |
65 | n2l(in, tin0); | |
66 | tin[0] = tin0; | |
67 | n2l(in, tin1); | |
68 | tin[1] = tin1; | |
9021a5df | 69 | IDEA_encrypt(tin, ks); |
0f113f3e MC |
70 | tout0 = tin[0] ^ xor0; |
71 | tout1 = tin[1] ^ xor1; | |
72 | l2n(tout0, out); | |
73 | l2n(tout1, out); | |
74 | xor0 = tin0; | |
75 | xor1 = tin1; | |
76 | } | |
77 | if (l != -8) { | |
78 | n2l(in, tin0); | |
79 | tin[0] = tin0; | |
80 | n2l(in, tin1); | |
81 | tin[1] = tin1; | |
9021a5df | 82 | IDEA_encrypt(tin, ks); |
0f113f3e MC |
83 | tout0 = tin[0] ^ xor0; |
84 | tout1 = tin[1] ^ xor1; | |
85 | l2nn(tout0, tout1, out, l + 8); | |
86 | xor0 = tin0; | |
87 | xor1 = tin1; | |
88 | } | |
89 | l2n(xor0, iv); | |
90 | l2n(xor1, iv); | |
91 | } | |
92 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; | |
93 | tin[0] = tin[1] = 0; | |
94 | } | |
d02b48c6 | 95 | |
9021a5df | 96 | void IDEA_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key) |
0f113f3e MC |
97 | { |
98 | register IDEA_INT *p; | |
99 | register unsigned long x1, x2, x3, x4, t0, t1, ul; | |
58964a49 | 100 | |
0f113f3e MC |
101 | x2 = d[0]; |
102 | x1 = (x2 >> 16); | |
103 | x4 = d[1]; | |
104 | x3 = (x4 >> 16); | |
58964a49 | 105 | |
0f113f3e | 106 | p = &(key->data[0][0]); |
58964a49 | 107 | |
0f113f3e MC |
108 | E_IDEA(0); |
109 | E_IDEA(1); | |
110 | E_IDEA(2); | |
111 | E_IDEA(3); | |
112 | E_IDEA(4); | |
113 | E_IDEA(5); | |
114 | E_IDEA(6); | |
115 | E_IDEA(7); | |
58964a49 | 116 | |
0f113f3e MC |
117 | x1 &= 0xffff; |
118 | idea_mul(x1, x1, *p, ul); | |
119 | p++; | |
58964a49 | 120 | |
0f113f3e MC |
121 | t0 = x3 + *(p++); |
122 | t1 = x2 + *(p++); | |
58964a49 | 123 | |
0f113f3e MC |
124 | x4 &= 0xffff; |
125 | idea_mul(x4, x4, *p, ul); | |
58964a49 | 126 | |
0f113f3e MC |
127 | d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16); |
128 | d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16); | |
129 | } |