Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/des/cfb64enc.c |
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1 | /* | - | ||||||
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | - | ||||||
3 | * | - | ||||||
4 | * Licensed under the OpenSSL license (the "License"). You may not use | - | ||||||
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 | - | ||||||
8 | */ | - | ||||||
9 | - | |||||||
10 | #include "des_locl.h" | - | ||||||
11 | - | |||||||
12 | /* | - | ||||||
13 | * The input and output encrypted as though 64bit cfb mode is being used. | - | ||||||
14 | * The extra state information to record how much of the 64bit block we have | - | ||||||
15 | * used is contained in *num; | - | ||||||
16 | */ | - | ||||||
17 | - | |||||||
18 | void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out, | - | ||||||
19 | long length, DES_key_schedule *schedule, | - | ||||||
20 | DES_cblock *ivec, int *num, int enc) | - | ||||||
21 | { | - | ||||||
22 | register DES_LONG v0, v1; | - | ||||||
23 | register long l = length; | - | ||||||
24 | register int n = *num; | - | ||||||
25 | DES_LONG ti[2]; | - | ||||||
26 | unsigned char *iv, c, cc; | - | ||||||
27 | - | |||||||
28 | iv = &(*ivec)[0]; | - | ||||||
29 | if (enc) {
| 31-43 | ||||||
30 | while (l--) {
| 43-6302 | ||||||
31 | if (n == 0) {
| 788-5514 | ||||||
32 | c2l(iv, v0); | - | ||||||
33 | ti[0] = v0; | - | ||||||
34 | c2l(iv, v1); | - | ||||||
35 | ti[1] = v1; | - | ||||||
36 | DES_encrypt1(ti, schedule, DES_ENCRYPT); | - | ||||||
37 | iv = &(*ivec)[0]; | - | ||||||
38 | v0 = ti[0]; | - | ||||||
39 | l2c(v0, iv); | - | ||||||
40 | v0 = ti[1]; | - | ||||||
41 | l2c(v0, iv); | - | ||||||
42 | iv = &(*ivec)[0]; | - | ||||||
43 | } executed 788 times by 1 test: end of block Executed by:
| 788 | ||||||
44 | c = *(in++) ^ iv[n]; | - | ||||||
45 | *(out++) = c; | - | ||||||
46 | iv[n] = c; | - | ||||||
47 | n = (n + 1) & 0x07; | - | ||||||
48 | } executed 6302 times by 1 test: end of block Executed by:
| 6302 | ||||||
49 | } else { executed 43 times by 1 test: end of block Executed by:
| 43 | ||||||
50 | while (l--) {
| 31-6302 | ||||||
51 | if (n == 0) {
| 788-5514 | ||||||
52 | c2l(iv, v0); | - | ||||||
53 | ti[0] = v0; | - | ||||||
54 | c2l(iv, v1); | - | ||||||
55 | ti[1] = v1; | - | ||||||
56 | DES_encrypt1(ti, schedule, DES_ENCRYPT); | - | ||||||
57 | iv = &(*ivec)[0]; | - | ||||||
58 | v0 = ti[0]; | - | ||||||
59 | l2c(v0, iv); | - | ||||||
60 | v0 = ti[1]; | - | ||||||
61 | l2c(v0, iv); | - | ||||||
62 | iv = &(*ivec)[0]; | - | ||||||
63 | } executed 788 times by 1 test: end of block Executed by:
| 788 | ||||||
64 | cc = *(in++); | - | ||||||
65 | c = iv[n]; | - | ||||||
66 | iv[n] = cc; | - | ||||||
67 | *(out++) = c ^ cc; | - | ||||||
68 | n = (n + 1) & 0x07; | - | ||||||
69 | } executed 6302 times by 1 test: end of block Executed by:
| 6302 | ||||||
70 | } executed 31 times by 1 test: end of block Executed by:
| 31 | ||||||
71 | v0 = v1 = ti[0] = ti[1] = c = cc = 0; | - | ||||||
72 | *num = n; | - | ||||||
73 | } executed 74 times by 1 test: end of block Executed by:
| 74 | ||||||
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