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Commit | Line | Data |
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2039c421 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
0f113f3e | 3 | * |
5e4435a7 | 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 | |
58964a49 RE |
8 | */ |
9 | ||
62c3fed0 P |
10 | /* |
11 | * RC5 low level APIs are deprecated for public use, but still ok for internal | |
12 | * use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
ec577822 | 16 | #include <openssl/rc5.h> |
706457b7 | 17 | #include "rc5_local.h" |
58964a49 | 18 | |
0f113f3e MC |
19 | /* |
20 | * The input and output encrypted as though 64bit ofb mode is being used. | |
21 | * The extra state information to record how much of the 64bit block we have | |
22 | * used is contained in *num; | |
58964a49 | 23 | */ |
1921eaad | 24 | void RC5_32_ofb64_encrypt(const unsigned char *in, unsigned char *out, |
0f113f3e MC |
25 | long length, RC5_32_KEY *schedule, |
26 | unsigned char *ivec, int *num) | |
27 | { | |
28 | register unsigned long v0, v1, t; | |
29 | register int n = *num; | |
30 | register long l = length; | |
31 | unsigned char d[8]; | |
32 | register char *dp; | |
33 | unsigned long ti[2]; | |
34 | unsigned char *iv; | |
35 | int save = 0; | |
58964a49 | 36 | |
0f113f3e MC |
37 | iv = (unsigned char *)ivec; |
38 | c2l(iv, v0); | |
39 | c2l(iv, v1); | |
40 | ti[0] = v0; | |
41 | ti[1] = v1; | |
42 | dp = (char *)d; | |
43 | l2c(v0, dp); | |
44 | l2c(v1, dp); | |
45 | while (l--) { | |
46 | if (n == 0) { | |
47 | RC5_32_encrypt((unsigned long *)ti, schedule); | |
48 | dp = (char *)d; | |
49 | t = ti[0]; | |
50 | l2c(t, dp); | |
51 | t = ti[1]; | |
52 | l2c(t, dp); | |
53 | save++; | |
54 | } | |
55 | *(out++) = *(in++) ^ d[n]; | |
56 | n = (n + 1) & 0x07; | |
57 | } | |
58 | if (save) { | |
59 | v0 = ti[0]; | |
60 | v1 = ti[1]; | |
61 | iv = (unsigned char *)ivec; | |
62 | l2c(v0, iv); | |
63 | l2c(v1, iv); | |
64 | } | |
65 | t = v0 = v1 = ti[0] = ti[1] = 0; | |
66 | *num = n; | |
67 | } |