File: | src/lib/libcrypto/des/xcbc_enc.c |
Warning: | line 151, column 16 Although the value stored to 'outW0' is used in the enclosing expression, the value is never actually read from 'outW0' |
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1 | /* $OpenBSD: xcbc_enc.c,v 1.12 2023/07/08 07:34:34 jsing Exp $ */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
3 | * All rights reserved. |
4 | * |
5 | * This package is an SSL implementation written |
6 | * by Eric Young (eay@cryptsoft.com). |
7 | * The implementation was written so as to conform with Netscapes SSL. |
8 | * |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions |
11 | * apply to all code found in this distribution, be it the RC4, RSA, |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
13 | * included with this distribution is covered by the same copyright terms |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
15 | * |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. |
18 | * If this package is used in a product, Eric Young should be given attribution |
19 | * as the author of the parts of the library used. |
20 | * This can be in the form of a textual message at program startup or |
21 | * in documentation (online or textual) provided with the package. |
22 | * |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions |
25 | * are met: |
26 | * 1. Redistributions of source code must retain the copyright |
27 | * notice, this list of conditions and the following disclaimer. |
28 | * 2. Redistributions in binary form must reproduce the above copyright |
29 | * notice, this list of conditions and the following disclaimer in the |
30 | * documentation and/or other materials provided with the distribution. |
31 | * 3. All advertising materials mentioning features or use of this software |
32 | * must display the following acknowledgement: |
33 | * "This product includes cryptographic software written by |
34 | * Eric Young (eay@cryptsoft.com)" |
35 | * The word 'cryptographic' can be left out if the rouines from the library |
36 | * being used are not cryptographic related :-). |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
40 | * |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
51 | * SUCH DAMAGE. |
52 | * |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
55 | * copied and put under another distribution licence |
56 | * [including the GNU Public Licence.] |
57 | */ |
58 | |
59 | #include "des_local.h" |
60 | |
61 | /* RSA's DESX */ |
62 | |
63 | void |
64 | DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, |
65 | long length, DES_key_schedule *schedule, |
66 | DES_cblock *ivec, const_DES_cblock *inw, |
67 | const_DES_cblock *outw, int enc) |
68 | { |
69 | DES_LONGunsigned int tin0, tin1; |
70 | DES_LONGunsigned int tout0, tout1, xor0, xor1; |
71 | DES_LONGunsigned int inW0, inW1, outW0, outW1; |
72 | const unsigned char *in2; |
73 | long l = length; |
74 | DES_LONGunsigned int tin[2]; |
75 | unsigned char *iv; |
76 | |
77 | in2 = &(*inw)[0]; |
78 | c2l(in2, inW0)(inW0 =((unsigned int)(*((in2)++))) , inW0|=((unsigned int)(* ((in2)++)))<< 8L, inW0|=((unsigned int)(*((in2)++)))<< 16L, inW0|=((unsigned int)(*((in2)++)))<<24L); |
79 | c2l(in2, inW1)(inW1 =((unsigned int)(*((in2)++))) , inW1|=((unsigned int)(* ((in2)++)))<< 8L, inW1|=((unsigned int)(*((in2)++)))<< 16L, inW1|=((unsigned int)(*((in2)++)))<<24L); |
80 | in2 = &(*outw)[0]; |
81 | c2l(in2, outW0)(outW0 =((unsigned int)(*((in2)++))) , outW0|=((unsigned int) (*((in2)++)))<< 8L, outW0|=((unsigned int)(*((in2)++))) <<16L, outW0|=((unsigned int)(*((in2)++)))<<24L); |
82 | c2l(in2, outW1)(outW1 =((unsigned int)(*((in2)++))) , outW1|=((unsigned int) (*((in2)++)))<< 8L, outW1|=((unsigned int)(*((in2)++))) <<16L, outW1|=((unsigned int)(*((in2)++)))<<24L); |
83 | |
84 | iv = &(*ivec)[0]; |
85 | |
86 | if (enc) { |
87 | c2l(iv, tout0)(tout0 =((unsigned int)(*((iv)++))) , tout0|=((unsigned int)( *((iv)++)))<< 8L, tout0|=((unsigned int)(*((iv)++)))<< 16L, tout0|=((unsigned int)(*((iv)++)))<<24L); |
88 | c2l(iv, tout1)(tout1 =((unsigned int)(*((iv)++))) , tout1|=((unsigned int)( *((iv)++)))<< 8L, tout1|=((unsigned int)(*((iv)++)))<< 16L, tout1|=((unsigned int)(*((iv)++)))<<24L); |
89 | for (l -= 8; l >= 0; l -= 8) { |
90 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
91 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
92 | tin0 ^= tout0 ^ inW0; |
93 | tin[0] = tin0; |
94 | tin1 ^= tout1 ^ inW1; |
95 | tin[1] = tin1; |
96 | DES_encrypt1(tin, schedule, DES_ENCRYPT1); |
97 | tout0 = tin[0] ^ outW0; |
98 | 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)); |
99 | tout1 = tin[1] ^ outW1; |
100 | 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)); |
101 | } |
102 | if (l != -8) { |
103 | 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)))); } }; |
104 | tin0 ^= tout0 ^ inW0; |
105 | tin[0] = tin0; |
106 | tin1 ^= tout1 ^ inW1; |
107 | tin[1] = tin1; |
108 | DES_encrypt1(tin, schedule, DES_ENCRYPT1); |
109 | tout0 = tin[0] ^ outW0; |
110 | 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)); |
111 | tout1 = tin[1] ^ outW1; |
112 | 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)); |
113 | } |
114 | iv = &(*ivec)[0]; |
115 | 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)); |
116 | 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)); |
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 ^ outW0; |
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 ^ outW1; |
125 | DES_encrypt1(tin, schedule, DES_DECRYPT0); |
126 | tout0 = tin[0] ^ xor0 ^ inW0; |
127 | tout1 = tin[1] ^ xor1 ^ inW1; |
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 ^ outW0; |
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 ^ outW1; |
138 | DES_encrypt1(tin, schedule, DES_DECRYPT0); |
139 | tout0 = tin[0] ^ xor0 ^ inW0; |
140 | tout1 = tin[1] ^ xor1 ^ inW1; |
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 | xor0 = tin0; |
143 | xor1 = tin1; |
144 | } |
145 | |
146 | iv = &(*ivec)[0]; |
147 | 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)); |
148 | 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)); |
149 | } |
150 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; |
151 | inW0 = inW1 = outW0 = outW1 = 0; |
Although the value stored to 'outW0' is used in the enclosing expression, the value is never actually read from 'outW0' | |
152 | tin[0] = tin[1] = 0; |
153 | } |