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Commit | Line | Data |
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2039c421 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
0f113f3e | 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 | ||
ec577822 | 10 | #include <openssl/idea.h> |
706457b7 | 11 | #include "idea_local.h" |
d02b48c6 | 12 | |
0f113f3e MC |
13 | /* |
14 | * The input and output encrypted as though 64bit ofb mode is being used. | |
15 | * The extra state information to record how much of the 64bit block we have | |
16 | * used is contained in *num; | |
d02b48c6 | 17 | */ |
9021a5df | 18 | void IDEA_ofb64_encrypt(const unsigned char *in, unsigned char *out, |
0f113f3e MC |
19 | long length, IDEA_KEY_SCHEDULE *schedule, |
20 | unsigned char *ivec, int *num) | |
21 | { | |
22 | register unsigned long v0, v1, t; | |
23 | register int n = *num; | |
24 | register long l = length; | |
25 | unsigned char d[8]; | |
26 | register char *dp; | |
27 | unsigned long ti[2]; | |
28 | unsigned char *iv; | |
29 | int save = 0; | |
d02b48c6 | 30 | |
0f113f3e MC |
31 | iv = (unsigned char *)ivec; |
32 | n2l(iv, v0); | |
33 | n2l(iv, v1); | |
34 | ti[0] = v0; | |
35 | ti[1] = v1; | |
36 | dp = (char *)d; | |
37 | l2n(v0, dp); | |
38 | l2n(v1, dp); | |
39 | while (l--) { | |
40 | if (n == 0) { | |
9021a5df | 41 | IDEA_encrypt((unsigned long *)ti, schedule); |
0f113f3e MC |
42 | dp = (char *)d; |
43 | t = ti[0]; | |
44 | l2n(t, dp); | |
45 | t = ti[1]; | |
46 | l2n(t, dp); | |
47 | save++; | |
48 | } | |
49 | *(out++) = *(in++) ^ d[n]; | |
50 | n = (n + 1) & 0x07; | |
51 | } | |
52 | if (save) { | |
53 | v0 = ti[0]; | |
54 | v1 = ti[1]; | |
55 | iv = (unsigned char *)ivec; | |
56 | l2n(v0, iv); | |
57 | l2n(v1, iv); | |
58 | } | |
59 | t = v0 = v1 = ti[0] = ti[1] = 0; | |
60 | *num = n; | |
61 | } |