OpenCoverage

cfb_enc.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/des/cfb_enc.c
Source codeSwitch to Preprocessed file
LineSourceCount
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 "e_os.h"-
11#include "des_locl.h"-
12#include <assert.h>-
13-
14/*-
15 * The input and output are loaded in multiples of 8 bits. What this means is-
16 * that if you hame numbits=12 and length=2 the first 12 bits will be-
17 * retrieved from the first byte and half the second. The second 12 bits-
18 * will come from the 3rd and half the 4th byte.-
19 */-
20/*-
21 * Until Aug 1 2003 this function did not correctly implement CFB-r, so it-
22 * will not be compatible with any encryption prior to that date. Ben.-
23 */-
24void DES_cfb_encrypt(const unsigned char *in, unsigned char *out, int numbits,-
25 long length, DES_key_schedule *schedule,-
26 DES_cblock *ivec, int enc)-
27{-
28 register DES_LONG d0, d1, v0, v1;-
29 register unsigned long l = length;-
30 register int num = numbits / 8, n = (numbits + 7) / 8, i, rem =-
31 numbits % 8;-
32 DES_LONG ti[2];-
33 unsigned char *iv;-
34#ifndef L_ENDIAN-
35 unsigned char ovec[16];-
36#else-
37 unsigned int sh[4];-
38 unsigned char *ovec = (unsigned char *)sh;-
39-
40 /* I kind of count that compiler optimizes away this assertion, */-
41 assert(sizeof(sh[0]) == 4); /* as this holds true for all, */-
42 /* but 16-bit platforms... */-
43-
44#endif-
45-
46 if (numbits <= 0 || numbits > 64)
numbits <= 0Description
TRUEnever evaluated
FALSEevaluated 31420 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
numbits > 64Description
TRUEnever evaluated
FALSEevaluated 31420 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-31420
47 return;
never executed: return;
0
48 iv = &(*ivec)[0];-
49 c2l(iv, v0);-
50 c2l(iv, v1);-
51 if (enc) {
encDescription
TRUEevaluated 15710 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15710 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
15710
52 while (l >= (unsigned long)n) {
l >= (unsigned long)nDescription
TRUEevaluated 17713 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15710 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
15710-17713
53 l -= n;-
54 ti[0] = v0;-
55 ti[1] = v1;-
56 DES_encrypt1((DES_LONG *)ti, schedule, DES_ENCRYPT);-
57 c2ln(in, d0, d1, n);
executed 17713 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 7:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 5:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 3:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 25 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
executed 3 times by 1 test: case 8:
Executed by:
  • libcrypto.so.1.1
never executed: case 7:
executed 4 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
never executed: case 5:
executed 6 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
never executed: case 3:
executed 12 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
executed 17713 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
0-17713
58 in += n;-
59 d0 ^= ti[0];-
60 d1 ^= ti[1];-
61 l2cn(d0, d1, out, n);
executed 17713 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 7:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 5:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 3:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 25 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
executed 3 times by 1 test: case 8:
Executed by:
  • libcrypto.so.1.1
never executed: case 7:
executed 4 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
never executed: case 5:
executed 6 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
never executed: case 3:
executed 12 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
executed 17713 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
0-17713
62 out += n;-
63 /*-
64 * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under-
65 * gcc :-(-
66 */-
67 if (numbits == 32) {
numbits == 32Description
TRUEevaluated 6 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 17707 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
6-17707
68 v0 = v1;-
69 v1 = d0;-
70 } else if (numbits == 64) {
executed 6 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
numbits == 64Description
TRUEevaluated 3 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 17704 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
3-17704
71 v0 = d0;-
72 v1 = d1;-
73 } else {
executed 3 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
3
74#ifndef L_ENDIAN-
75 iv = &ovec[0];-
76 l2c(v0, iv);-
77 l2c(v1, iv);-
78 l2c(d0, iv);-
79 l2c(d1, iv);-
80#else-
81 sh[0] = v0, sh[1] = v1, sh[2] = d0, sh[3] = d1;-
82#endif-
83 if (rem == 0)
rem == 0Description
TRUEevaluated 2024 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15680 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
2024-15680
84 memmove(ovec, ovec + num, 8);
executed 2024 times by 1 test: memmove(ovec, ovec + num, 8);
Executed by:
  • libcrypto.so.1.1
2024
85 else-
86 for (i = 0; i < 8; ++i)
i < 8Description
TRUEevaluated 125440 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15680 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
15680-125440
87 ovec[i] = ovec[i + num] << rem |
executed 125440 times by 1 test: ovec[i] = ovec[i + num] << rem | ovec[i + num + 1] >> (8 - rem);
Executed by:
  • libcrypto.so.1.1
125440
88 ovec[i + num + 1] >> (8 - rem);
executed 125440 times by 1 test: ovec[i] = ovec[i + num] << rem | ovec[i + num + 1] >> (8 - rem);
Executed by:
  • libcrypto.so.1.1
125440
89#ifdef L_ENDIAN-
90 v0 = sh[0], v1 = sh[1];-
91#else-
92 iv = &ovec[0];-
93 c2l(iv, v0);-
94 c2l(iv, v1);-
95#endif-
96 }
executed 17704 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
17704
97 }-
98 } else {
executed 15710 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
15710
99 while (l >= (unsigned long)n) {
l >= (unsigned long)nDescription
TRUEevaluated 17713 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15710 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
15710-17713
100 l -= n;-
101 ti[0] = v0;-
102 ti[1] = v1;-
103 DES_encrypt1((DES_LONG *)ti, schedule, DES_ENCRYPT);-
104 c2ln(in, d0, d1, n);
executed 17713 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 7:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 5:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 3:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 25 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
executed 3 times by 1 test: case 8:
Executed by:
  • libcrypto.so.1.1
never executed: case 7:
executed 4 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
never executed: case 5:
executed 6 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
never executed: case 3:
executed 12 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
executed 17713 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
0-17713
105 in += n;-
106 /*-
107 * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under-
108 * gcc :-(-
109 */-
110 if (numbits == 32) {
numbits == 32Description
TRUEevaluated 6 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 17707 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
6-17707
111 v0 = v1;-
112 v1 = d0;-
113 } else if (numbits == 64) {
executed 6 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
numbits == 64Description
TRUEevaluated 3 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 17704 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
3-17704
114 v0 = d0;-
115 v1 = d1;-
116 } else {
executed 3 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
3
117#ifndef L_ENDIAN-
118 iv = &ovec[0];-
119 l2c(v0, iv);-
120 l2c(v1, iv);-
121 l2c(d0, iv);-
122 l2c(d1, iv);-
123#else-
124 sh[0] = v0, sh[1] = v1, sh[2] = d0, sh[3] = d1;-
125#endif-
126 if (rem == 0)
rem == 0Description
TRUEevaluated 2024 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15680 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
2024-15680
127 memmove(ovec, ovec + num, 8);
executed 2024 times by 1 test: memmove(ovec, ovec + num, 8);
Executed by:
  • libcrypto.so.1.1
2024
128 else-
129 for (i = 0; i < 8; ++i)
i < 8Description
TRUEevaluated 125440 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 15680 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
15680-125440
130 ovec[i] = ovec[i + num] << rem |
executed 125440 times by 1 test: ovec[i] = ovec[i + num] << rem | ovec[i + num + 1] >> (8 - rem);
Executed by:
  • libcrypto.so.1.1
125440
131 ovec[i + num + 1] >> (8 - rem);
executed 125440 times by 1 test: ovec[i] = ovec[i + num] << rem | ovec[i + num + 1] >> (8 - rem);
Executed by:
  • libcrypto.so.1.1
125440
132#ifdef L_ENDIAN-
133 v0 = sh[0], v1 = sh[1];-
134#else-
135 iv = &ovec[0];-
136 c2l(iv, v0);-
137 c2l(iv, v1);-
138#endif-
139 }
executed 17704 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
17704
140 d0 ^= ti[0];-
141 d1 ^= ti[1];-
142 l2cn(d0, d1, out, n);
executed 17713 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 7:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 3 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 5:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 7 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 3:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 13 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
code before this statement executed 25 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
executed 3 times by 1 test: case 8:
Executed by:
  • libcrypto.so.1.1
never executed: case 7:
executed 4 times by 1 test: case 6:
Executed by:
  • libcrypto.so.1.1
never executed: case 5:
executed 6 times by 1 test: case 4:
Executed by:
  • libcrypto.so.1.1
never executed: case 3:
executed 12 times by 1 test: case 2:
Executed by:
  • libcrypto.so.1.1
executed 17713 times by 1 test: case 1:
Executed by:
  • libcrypto.so.1.1
0-17713
143 out += n;-
144 }
executed 17713 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
17713
145 }
executed 15710 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
15710
146 iv = &(*ivec)[0];-
147 l2c(v0, iv);-
148 l2c(v1, iv);-
149 v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0;-
150}
executed 31420 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
31420
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