Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/modes/ofb128.c |
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1 | /* $OpenBSD: ofb128.c,v 1.4 2015/02/10 09:46:30 miod Exp $ */ | - | ||||||||||||
2 | /* ==================================================================== | - | ||||||||||||
3 | * Copyright (c) 2008 The OpenSSL Project. All rights reserved. | - | ||||||||||||
4 | * | - | ||||||||||||
5 | * Redistribution and use in source and binary forms, with or without | - | ||||||||||||
6 | * modification, are permitted provided that the following conditions | - | ||||||||||||
7 | * are met: | - | ||||||||||||
8 | * | - | ||||||||||||
9 | * 1. Redistributions of source code must retain the above copyright | - | ||||||||||||
10 | * notice, this list of conditions and the following disclaimer. | - | ||||||||||||
11 | * | - | ||||||||||||
12 | * 2. Redistributions in binary form must reproduce the above copyright | - | ||||||||||||
13 | * notice, this list of conditions and the following disclaimer in | - | ||||||||||||
14 | * the documentation and/or other materials provided with the | - | ||||||||||||
15 | * distribution. | - | ||||||||||||
16 | * | - | ||||||||||||
17 | * 3. All advertising materials mentioning features or use of this | - | ||||||||||||
18 | * software must display the following acknowledgment: | - | ||||||||||||
19 | * "This product includes software developed by the OpenSSL Project | - | ||||||||||||
20 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | - | ||||||||||||
21 | * | - | ||||||||||||
22 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | - | ||||||||||||
23 | * endorse or promote products derived from this software without | - | ||||||||||||
24 | * prior written permission. For written permission, please contact | - | ||||||||||||
25 | * openssl-core@openssl.org. | - | ||||||||||||
26 | * | - | ||||||||||||
27 | * 5. Products derived from this software may not be called "OpenSSL" | - | ||||||||||||
28 | * nor may "OpenSSL" appear in their names without prior written | - | ||||||||||||
29 | * permission of the OpenSSL Project. | - | ||||||||||||
30 | * | - | ||||||||||||
31 | * 6. Redistributions of any form whatsoever must retain the following | - | ||||||||||||
32 | * acknowledgment: | - | ||||||||||||
33 | * "This product includes software developed by the OpenSSL Project | - | ||||||||||||
34 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | - | ||||||||||||
35 | * | - | ||||||||||||
36 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | - | ||||||||||||
37 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | - | ||||||||||||
38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | - | ||||||||||||
39 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | - | ||||||||||||
40 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | - | ||||||||||||
41 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | - | ||||||||||||
42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | - | ||||||||||||
43 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | - | ||||||||||||
44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | - | ||||||||||||
45 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | - | ||||||||||||
46 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | - | ||||||||||||
47 | * OF THE POSSIBILITY OF SUCH DAMAGE. | - | ||||||||||||
48 | * ==================================================================== | - | ||||||||||||
49 | * | - | ||||||||||||
50 | */ | - | ||||||||||||
51 | - | |||||||||||||
52 | #include <openssl/crypto.h> | - | ||||||||||||
53 | #include "modes_lcl.h" | - | ||||||||||||
54 | #include <string.h> | - | ||||||||||||
55 | - | |||||||||||||
56 | #ifndef MODES_DEBUG | - | ||||||||||||
57 | # ifndef NDEBUG | - | ||||||||||||
58 | # define NDEBUG | - | ||||||||||||
59 | # endif | - | ||||||||||||
60 | #endif | - | ||||||||||||
61 | - | |||||||||||||
62 | /* The input and output encrypted as though 128bit ofb mode is being | - | ||||||||||||
63 | * used. The extra state information to record how much of the | - | ||||||||||||
64 | * 128bit block we have used is contained in *num; | - | ||||||||||||
65 | */ | - | ||||||||||||
66 | void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out, | - | ||||||||||||
67 | size_t len, const void *key, | - | ||||||||||||
68 | unsigned char ivec[16], int *num, | - | ||||||||||||
69 | block128_f block) | - | ||||||||||||
70 | { | - | ||||||||||||
71 | unsigned int n; | - | ||||||||||||
72 | size_t l=0; | - | ||||||||||||
73 | - | |||||||||||||
74 | n = *num; | - | ||||||||||||
75 | - | |||||||||||||
76 | #if !defined(OPENSSL_SMALL_FOOTPRINT) | - | ||||||||||||
77 | if (16%sizeof(size_t) == 0) do { /* always true actually */
| 0-60 | ||||||||||||
78 | while (n && len) {
| 0-60 | ||||||||||||
79 | *(out++) = *(in++) ^ ivec[n]; | - | ||||||||||||
80 | --len; | - | ||||||||||||
81 | n = (n+1) % 16; | - | ||||||||||||
82 | } never executed: end of block | 0 | ||||||||||||
83 | #ifdef __STRICT_ALIGNMENT | - | ||||||||||||
84 | if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) | - | ||||||||||||
85 | break; | - | ||||||||||||
86 | #endif | - | ||||||||||||
87 | while (len>=16) {
| 60-708 | ||||||||||||
88 | (*block)(ivec, ivec, key); | - | ||||||||||||
89 | for (; n<16; n+=sizeof(size_t))
| 708-1416 | ||||||||||||
90 | *(size_t*)(out+n) = executed 1416 times by 2 tests: *(size_t*)(out+n) = *(size_t*)(in+n) ^ *(size_t*)(ivec+n); Executed by:
| 1416 | ||||||||||||
91 | *(size_t*)(in+n) ^ *(size_t*)(ivec+n); executed 1416 times by 2 tests: *(size_t*)(out+n) = *(size_t*)(in+n) ^ *(size_t*)(ivec+n); Executed by:
| 1416 | ||||||||||||
92 | len -= 16; | - | ||||||||||||
93 | out += 16; | - | ||||||||||||
94 | in += 16; | - | ||||||||||||
95 | n = 0; | - | ||||||||||||
96 | } executed 708 times by 2 tests: end of block Executed by:
| 708 | ||||||||||||
97 | if (len) {
| 12-48 | ||||||||||||
98 | (*block)(ivec, ivec, key); | - | ||||||||||||
99 | while (len--) {
| 12-96 | ||||||||||||
100 | out[n] = in[n] ^ ivec[n]; | - | ||||||||||||
101 | ++n; | - | ||||||||||||
102 | } executed 96 times by 1 test: end of block Executed by:
| 96 | ||||||||||||
103 | } executed 12 times by 1 test: end of block Executed by:
| 12 | ||||||||||||
104 | *num = n; | - | ||||||||||||
105 | return; executed 60 times by 2 tests: return; Executed by:
| 60 | ||||||||||||
106 | } while(0); never executed: end of block | 0 | ||||||||||||
107 | /* the rest would be commonly eliminated by x86* compiler */ | - | ||||||||||||
108 | #endif | - | ||||||||||||
109 | while (l<len) {
| 0 | ||||||||||||
110 | if (n==0) {
| 0 | ||||||||||||
111 | (*block)(ivec, ivec, key); | - | ||||||||||||
112 | } never executed: end of block | 0 | ||||||||||||
113 | out[l] = in[l] ^ ivec[n]; | - | ||||||||||||
114 | ++l; | - | ||||||||||||
115 | n = (n+1) % 16; | - | ||||||||||||
116 | } never executed: end of block | 0 | ||||||||||||
117 | - | |||||||||||||
118 | *num=n; | - | ||||||||||||
119 | } never executed: end of block | 0 | ||||||||||||
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