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Commit | Line | Data |
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2039c421 | 1 | /* |
3c2bdd7d | 2 | * Copyright 1995-2021 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 | ||
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 | |
0f113f3e MC |
20 | /* |
21 | * The input and output encrypted as though 64bit ofb mode is being used. | |
22 | * The extra state information to record how much of the 64bit block we have | |
23 | * used is contained in *num; | |
d02b48c6 | 24 | */ |
9021a5df | 25 | void IDEA_ofb64_encrypt(const unsigned char *in, unsigned char *out, |
0f113f3e MC |
26 | long length, IDEA_KEY_SCHEDULE *schedule, |
27 | unsigned char *ivec, int *num) | |
28 | { | |
29 | register unsigned long v0, v1, t; | |
30 | register int n = *num; | |
31 | register long l = length; | |
32 | unsigned char d[8]; | |
33 | register char *dp; | |
34 | unsigned long ti[2]; | |
35 | unsigned char *iv; | |
36 | int save = 0; | |
d02b48c6 | 37 | |
1634b2df P |
38 | if (n < 0) { |
39 | *num = -1; | |
40 | return; | |
41 | } | |
42 | ||
0f113f3e MC |
43 | iv = (unsigned char *)ivec; |
44 | n2l(iv, v0); | |
45 | n2l(iv, v1); | |
46 | ti[0] = v0; | |
47 | ti[1] = v1; | |
48 | dp = (char *)d; | |
49 | l2n(v0, dp); | |
50 | l2n(v1, dp); | |
51 | while (l--) { | |
52 | if (n == 0) { | |
9021a5df | 53 | IDEA_encrypt((unsigned long *)ti, schedule); |
0f113f3e MC |
54 | dp = (char *)d; |
55 | t = ti[0]; | |
56 | l2n(t, dp); | |
57 | t = ti[1]; | |
58 | l2n(t, dp); | |
59 | save++; | |
60 | } | |
61 | *(out++) = *(in++) ^ d[n]; | |
62 | n = (n + 1) & 0x07; | |
63 | } | |
64 | if (save) { | |
65 | v0 = ti[0]; | |
66 | v1 = ti[1]; | |
67 | iv = (unsigned char *)ivec; | |
68 | l2n(v0, iv); | |
69 | l2n(v1, iv); | |
70 | } | |
71 | t = v0 = v1 = ti[0] = ti[1] = 0; | |
72 | *num = n; | |
73 | } |