File: | src/lib/libcrypto/des/ncbc_enc.c |
Warning: | line 153, column 32 Although the value stored to 'xor0' is used in the enclosing expression, the value is never actually read from 'xor0' |
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1 | /* $OpenBSD: ncbc_enc.c,v 1.10 2023/07/08 07:34:34 jsing Exp $ */ |
2 | /* |
3 | * #included by: |
4 | * cbc_enc.c (DES_cbc_encrypt) |
5 | * des_enc.c (DES_ncbc_encrypt) |
6 | */ |
7 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
8 | * All rights reserved. |
9 | * |
10 | * This package is an SSL implementation written |
11 | * by Eric Young (eay@cryptsoft.com). |
12 | * The implementation was written so as to conform with Netscapes SSL. |
13 | * |
14 | * This library is free for commercial and non-commercial use as long as |
15 | * the following conditions are aheared to. The following conditions |
16 | * apply to all code found in this distribution, be it the RC4, RSA, |
17 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
18 | * included with this distribution is covered by the same copyright terms |
19 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
20 | * |
21 | * Copyright remains Eric Young's, and as such any Copyright notices in |
22 | * the code are not to be removed. |
23 | * If this package is used in a product, Eric Young should be given attribution |
24 | * as the author of the parts of the library used. |
25 | * This can be in the form of a textual message at program startup or |
26 | * in documentation (online or textual) provided with the package. |
27 | * |
28 | * Redistribution and use in source and binary forms, with or without |
29 | * modification, are permitted provided that the following conditions |
30 | * are met: |
31 | * 1. Redistributions of source code must retain the copyright |
32 | * notice, this list of conditions and the following disclaimer. |
33 | * 2. Redistributions in binary form must reproduce the above copyright |
34 | * notice, this list of conditions and the following disclaimer in the |
35 | * documentation and/or other materials provided with the distribution. |
36 | * 3. All advertising materials mentioning features or use of this software |
37 | * must display the following acknowledgement: |
38 | * "This product includes cryptographic software written by |
39 | * Eric Young (eay@cryptsoft.com)" |
40 | * The word 'cryptographic' can be left out if the rouines from the library |
41 | * being used are not cryptographic related :-). |
42 | * 4. If you include any Windows specific code (or a derivative thereof) from |
43 | * the apps directory (application code) you must include an acknowledgement: |
44 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
45 | * |
46 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
47 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
48 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
49 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
50 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
51 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
52 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
53 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
54 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
55 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
56 | * SUCH DAMAGE. |
57 | * |
58 | * The licence and distribution terms for any publically available version or |
59 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
60 | * copied and put under another distribution licence |
61 | * [including the GNU Public Licence.] |
62 | */ |
63 | |
64 | #include "des_local.h" |
65 | |
66 | #ifdef CBC_ENC_C__DONT_UPDATE_IV |
67 | void |
68 | DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
69 | DES_key_schedule *_schedule, DES_cblock *ivec, int enc) |
70 | #else |
71 | void |
72 | DES_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
73 | DES_key_schedule *_schedule, DES_cblock *ivec, int enc) |
74 | #endif |
75 | { |
76 | DES_LONGunsigned int tin0, tin1; |
77 | DES_LONGunsigned int tout0, tout1, xor0, xor1; |
78 | long l = length; |
79 | DES_LONGunsigned int tin[2]; |
80 | unsigned char *iv; |
81 | |
82 | iv = &(*ivec)[0]; |
83 | |
84 | if (enc) { |
85 | c2l(iv, tout0)(tout0 =((unsigned int)(*((iv)++))) , tout0|=((unsigned int)( *((iv)++)))<< 8L, tout0|=((unsigned int)(*((iv)++)))<< 16L, tout0|=((unsigned int)(*((iv)++)))<<24L); |
86 | c2l(iv, tout1)(tout1 =((unsigned int)(*((iv)++))) , tout1|=((unsigned int)( *((iv)++)))<< 8L, tout1|=((unsigned int)(*((iv)++)))<< 16L, tout1|=((unsigned int)(*((iv)++)))<<24L); |
87 | for (l -= 8; l >= 0; l -= 8) { |
88 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
89 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
90 | tin0 ^= tout0; |
91 | tin[0] = tin0; |
92 | tin1 ^= tout1; |
93 | tin[1] = tin1; |
94 | DES_encrypt1((DES_LONGunsigned int *)tin, _schedule, DES_ENCRYPT1); |
95 | tout0 = tin[0]; |
96 | l2c(tout0, out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
97 | tout1 = tin[1]; |
98 | l2c(tout1, out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
99 | } |
100 | if (l != -8) { |
101 | c2ln(in, tin0, tin1, l + 8){ in+=l + 8; tin0=tin1=0; switch (l + 8) { case 8: tin1 =((unsigned int)(*(--(in))))<<24L; case 7: tin1|=((unsigned int)(* (--(in))))<<16L; case 6: tin1|=((unsigned int)(*(--(in) )))<< 8L; case 5: tin1|=((unsigned int)(*(--(in)))); case 4: tin0 =((unsigned int)(*(--(in))))<<24L; case 3: tin0 |=((unsigned int)(*(--(in))))<<16L; case 2: tin0|=((unsigned int)(*(--(in))))<< 8L; case 1: tin0|=((unsigned int)(* (--(in)))); } }; |
102 | tin0 ^= tout0; |
103 | tin[0] = tin0; |
104 | tin1 ^= tout1; |
105 | tin[1] = tin1; |
106 | DES_encrypt1((DES_LONGunsigned int *)tin, _schedule, DES_ENCRYPT1); |
107 | tout0 = tin[0]; |
108 | l2c(tout0, out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
109 | tout1 = tin[1]; |
110 | l2c(tout1, out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
111 | } |
112 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
113 | iv = &(*ivec)[0]; |
114 | l2c(tout0, iv)(*((iv)++)=(unsigned char)(((tout0) )&0xff), *((iv)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((iv)++)=(unsigned char )(((tout0)>>16L)&0xff), *((iv)++)=(unsigned char)(( (tout0)>>24L)&0xff)); |
115 | l2c(tout1, iv)(*((iv)++)=(unsigned char)(((tout1) )&0xff), *((iv)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((iv)++)=(unsigned char )(((tout1)>>16L)&0xff), *((iv)++)=(unsigned char)(( (tout1)>>24L)&0xff)); |
116 | #endif |
117 | } else { |
118 | c2l(iv, xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); |
119 | c2l(iv, xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
120 | for (l -= 8; l >= 0; l -= 8) { |
121 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
122 | tin[0] = tin0; |
123 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
124 | tin[1] = tin1; |
125 | DES_encrypt1((DES_LONGunsigned int *)tin, _schedule, DES_DECRYPT0); |
126 | tout0 = tin[0] ^ xor0; |
127 | tout1 = tin[1] ^ xor1; |
128 | l2c(tout0, out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
129 | l2c(tout1, out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
130 | xor0 = tin0; |
131 | xor1 = tin1; |
132 | } |
133 | if (l != -8) { |
134 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
135 | tin[0] = tin0; |
136 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
137 | tin[1] = tin1; |
138 | DES_encrypt1((DES_LONGunsigned int *)tin, _schedule, DES_DECRYPT0); |
139 | tout0 = tin[0] ^ xor0; |
140 | tout1 = tin[1] ^ xor1; |
141 | l2cn(tout0, tout1, out, l + 8){ out+=l + 8; switch (l + 8) { case 8: *(--(out))=(unsigned char )(((tout1)>>24L)&0xff); case 7: *(--(out))=(unsigned char)(((tout1)>>16L)&0xff); case 6: *(--(out))=(unsigned char)(((tout1)>> 8L)&0xff); case 5: *(--(out))=(unsigned char)(((tout1) )&0xff); case 4: *(--(out))=(unsigned char )(((tout0)>>24L)&0xff); case 3: *(--(out))=(unsigned char)(((tout0)>>16L)&0xff); case 2: *(--(out))=(unsigned char)(((tout0)>> 8L)&0xff); case 1: *(--(out))=(unsigned char)(((tout0) )&0xff); } }; |
142 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
143 | xor0 = tin0; |
144 | xor1 = tin1; |
145 | #endif |
146 | } |
147 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
148 | iv = &(*ivec)[0]; |
149 | l2c(xor0, iv)(*((iv)++)=(unsigned char)(((xor0) )&0xff), *((iv)++)=(unsigned char)(((xor0)>> 8L)&0xff), *((iv)++)=(unsigned char )(((xor0)>>16L)&0xff), *((iv)++)=(unsigned char)((( xor0)>>24L)&0xff)); |
150 | l2c(xor1, iv)(*((iv)++)=(unsigned char)(((xor1) )&0xff), *((iv)++)=(unsigned char)(((xor1)>> 8L)&0xff), *((iv)++)=(unsigned char )(((xor1)>>16L)&0xff), *((iv)++)=(unsigned char)((( xor1)>>24L)&0xff)); |
151 | #endif |
152 | } |
153 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; |
Although the value stored to 'xor0' is used in the enclosing expression, the value is never actually read from 'xor0' | |
154 | tin[0] = tin[1] = 0; |
155 | } |