]>
Commit | Line | Data |
---|---|---|
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 | ||
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 cfb 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 RE |
24 | */ |
25 | ||
9021a5df | 26 | void IDEA_cfb64_encrypt(const unsigned char *in, unsigned char *out, |
0f113f3e MC |
27 | long length, IDEA_KEY_SCHEDULE *schedule, |
28 | unsigned char *ivec, int *num, int encrypt) | |
29 | { | |
30 | register unsigned long v0, v1, t; | |
31 | register int n = *num; | |
32 | register long l = length; | |
33 | unsigned long ti[2]; | |
34 | unsigned char *iv, c, cc; | |
d02b48c6 | 35 | |
0f113f3e MC |
36 | iv = (unsigned char *)ivec; |
37 | if (encrypt) { | |
38 | while (l--) { | |
39 | if (n == 0) { | |
40 | n2l(iv, v0); | |
41 | ti[0] = v0; | |
42 | n2l(iv, v1); | |
43 | ti[1] = v1; | |
9021a5df | 44 | IDEA_encrypt((unsigned long *)ti, schedule); |
0f113f3e MC |
45 | iv = (unsigned char *)ivec; |
46 | t = ti[0]; | |
47 | l2n(t, iv); | |
48 | t = ti[1]; | |
49 | l2n(t, iv); | |
50 | iv = (unsigned char *)ivec; | |
51 | } | |
52 | c = *(in++) ^ iv[n]; | |
53 | *(out++) = c; | |
54 | iv[n] = c; | |
55 | n = (n + 1) & 0x07; | |
56 | } | |
57 | } else { | |
58 | while (l--) { | |
59 | if (n == 0) { | |
60 | n2l(iv, v0); | |
61 | ti[0] = v0; | |
62 | n2l(iv, v1); | |
63 | ti[1] = v1; | |
9021a5df | 64 | IDEA_encrypt((unsigned long *)ti, schedule); |
0f113f3e MC |
65 | iv = (unsigned char *)ivec; |
66 | t = ti[0]; | |
67 | l2n(t, iv); | |
68 | t = ti[1]; | |
69 | l2n(t, iv); | |
70 | iv = (unsigned char *)ivec; | |
71 | } | |
72 | cc = *(in++); | |
73 | c = iv[n]; | |
74 | iv[n] = cc; | |
75 | *(out++) = c ^ cc; | |
76 | n = (n + 1) & 0x07; | |
77 | } | |
78 | } | |
79 | v0 = v1 = ti[0] = ti[1] = t = c = cc = 0; | |
80 | *num = n; | |
81 | } |