Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/modes/ofb128.c |
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1 | /* | - | ||||||||||||
2 | * Copyright 2008-2016 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 <openssl/crypto.h> | - | ||||||||||||
11 | #include "modes_lcl.h" | - | ||||||||||||
12 | #include <string.h> | - | ||||||||||||
13 | - | |||||||||||||
14 | /* | - | ||||||||||||
15 | * The input and output encrypted as though 128bit ofb mode is being used. | - | ||||||||||||
16 | * The extra state information to record how much of the 128bit block we have | - | ||||||||||||
17 | * used is contained in *num; | - | ||||||||||||
18 | */ | - | ||||||||||||
19 | void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out, | - | ||||||||||||
20 | size_t len, const void *key, | - | ||||||||||||
21 | unsigned char ivec[16], int *num, block128_f block) | - | ||||||||||||
22 | { | - | ||||||||||||
23 | unsigned int n; | - | ||||||||||||
24 | size_t l = 0; | - | ||||||||||||
25 | - | |||||||||||||
26 | n = *num; | - | ||||||||||||
27 | - | |||||||||||||
28 | #if !defined(OPENSSL_SMALL_FOOTPRINT) | - | ||||||||||||
29 | if (16 % sizeof(size_t) == 0) { /* always true actually */
| 0-20114 | ||||||||||||
30 | do { | - | ||||||||||||
31 | while (n && len) {
| 298-69406 | ||||||||||||
32 | *(out++) = *(in++) ^ ivec[n]; | - | ||||||||||||
33 | --len; | - | ||||||||||||
34 | n = (n + 1) % 16; | - | ||||||||||||
35 | } executed 69108 times by 1 test: end of block Executed by:
| 69108 | ||||||||||||
36 | # if defined(STRICT_ALIGNMENT) | - | ||||||||||||
37 | if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != | - | ||||||||||||
38 | 0) | - | ||||||||||||
39 | break; | - | ||||||||||||
40 | # endif | - | ||||||||||||
41 | while (len >= 16) {
| 20114-391304 | ||||||||||||
42 | (*block) (ivec, ivec, key); | - | ||||||||||||
43 | for (; n < 16; n += sizeof(size_t))
| 391304-782608 | ||||||||||||
44 | *(size_t *)(out + n) = executed 782608 times by 1 test: *(size_t *)(out + n) = *(size_t *)(in + n) ^ *(size_t *)(ivec + n); Executed by:
| 782608 | ||||||||||||
45 | *(size_t *)(in + n) ^ *(size_t *)(ivec + n); executed 782608 times by 1 test: *(size_t *)(out + n) = *(size_t *)(in + n) ^ *(size_t *)(ivec + n); Executed by:
| 782608 | ||||||||||||
46 | len -= 16; | - | ||||||||||||
47 | out += 16; | - | ||||||||||||
48 | in += 16; | - | ||||||||||||
49 | n = 0; | - | ||||||||||||
50 | } executed 391304 times by 1 test: end of block Executed by:
| 391304 | ||||||||||||
51 | if (len) {
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52 | (*block) (ivec, ivec, key); | - | ||||||||||||
53 | while (len--) {
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54 | out[n] = in[n] ^ ivec[n]; | - | ||||||||||||
55 | ++n; | - | ||||||||||||
56 | } executed 65192 times by 1 test: end of block Executed by:
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57 | } executed 8406 times by 1 test: end of block Executed by:
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58 | *num = n; | - | ||||||||||||
59 | return; executed 20114 times by 1 test: return; Executed by:
| 20114 | ||||||||||||
60 | } while (0); | - | ||||||||||||
61 | } never executed: end of block | 0 | ||||||||||||
62 | /* the rest would be commonly eliminated by x86* compiler */ | - | ||||||||||||
63 | #endif | - | ||||||||||||
64 | while (l < len) {
| 0 | ||||||||||||
65 | if (n == 0) {
| 0 | ||||||||||||
66 | (*block) (ivec, ivec, key); | - | ||||||||||||
67 | } never executed: end of block | 0 | ||||||||||||
68 | out[l] = in[l] ^ ivec[n]; | - | ||||||||||||
69 | ++l; | - | ||||||||||||
70 | n = (n + 1) % 16; | - | ||||||||||||
71 | } never executed: end of block | 0 | ||||||||||||
72 | - | |||||||||||||
73 | *num = n; | - | ||||||||||||
74 | } never executed: end of block | 0 | ||||||||||||
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