File: | src/lib/libcrypto/des/xcbc_enc.c |
Warning: | line 144, column 24 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: xcbc_enc.c,v 1.9 2015/02/07 13:19:15 doug 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_locl.h" |
60 | |
61 | /* RSA's DESX */ |
62 | |
63 | void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, |
64 | long length, DES_key_schedule *schedule, |
65 | DES_cblock *ivec, const_DES_cblock *inw, |
66 | const_DES_cblock *outw, int enc) |
67 | { |
68 | DES_LONGunsigned int tin0,tin1; |
69 | DES_LONGunsigned int tout0,tout1,xor0,xor1; |
70 | DES_LONGunsigned int inW0,inW1,outW0,outW1; |
71 | const unsigned char *in2; |
72 | long l=length; |
73 | DES_LONGunsigned int tin[2]; |
74 | unsigned char *iv; |
75 | |
76 | in2 = &(*inw)[0]; |
77 | c2l(in2,inW0)(inW0 =((unsigned int)(*((in2)++))) , inW0|=((unsigned int)(* ((in2)++)))<< 8L, inW0|=((unsigned int)(*((in2)++)))<< 16L, inW0|=((unsigned int)(*((in2)++)))<<24L); |
78 | c2l(in2,inW1)(inW1 =((unsigned int)(*((in2)++))) , inW1|=((unsigned int)(* ((in2)++)))<< 8L, inW1|=((unsigned int)(*((in2)++)))<< 16L, inW1|=((unsigned int)(*((in2)++)))<<24L); |
79 | in2 = &(*outw)[0]; |
80 | c2l(in2,outW0)(outW0 =((unsigned int)(*((in2)++))) , outW0|=((unsigned int) (*((in2)++)))<< 8L, outW0|=((unsigned int)(*((in2)++))) <<16L, outW0|=((unsigned int)(*((in2)++)))<<24L); |
81 | c2l(in2,outW1)(outW1 =((unsigned int)(*((in2)++))) , outW1|=((unsigned int) (*((in2)++)))<< 8L, outW1|=((unsigned int)(*((in2)++))) <<16L, outW1|=((unsigned int)(*((in2)++)))<<24L); |
82 | |
83 | iv = &(*ivec)[0]; |
84 | |
85 | if (enc) |
86 | { |
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 | { |
91 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
92 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
93 | tin0^=tout0^inW0; tin[0]=tin0; |
94 | tin1^=tout1^inW1; tin[1]=tin1; |
95 | DES_encrypt1(tin,schedule,DES_ENCRYPT1); |
96 | tout0=tin[0]^outW0; 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]^outW1; 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)); |
98 | } |
99 | if (l != -8) |
100 | { |
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^inW0; tin[0]=tin0; |
103 | tin1^=tout1^inW1; tin[1]=tin1; |
104 | DES_encrypt1(tin,schedule,DES_ENCRYPT1); |
105 | tout0=tin[0]^outW0; 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)); |
106 | tout1=tin[1]^outW1; 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)); |
107 | } |
108 | iv = &(*ivec)[0]; |
109 | 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)); |
110 | 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)); |
111 | } |
112 | else |
113 | { |
114 | c2l(iv,xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); |
115 | c2l(iv,xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
116 | for (l-=8; l>0; l-=8) |
117 | { |
118 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); tin[0]=tin0^outW0; |
119 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); tin[1]=tin1^outW1; |
120 | DES_encrypt1(tin,schedule,DES_DECRYPT0); |
121 | tout0=tin[0]^xor0^inW0; |
122 | tout1=tin[1]^xor1^inW1; |
123 | 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)); |
124 | 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)); |
125 | xor0=tin0; |
126 | xor1=tin1; |
127 | } |
128 | if (l != -8) |
129 | { |
130 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); tin[0]=tin0^outW0; |
131 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); tin[1]=tin1^outW1; |
132 | DES_encrypt1(tin,schedule,DES_DECRYPT0); |
133 | tout0=tin[0]^xor0^inW0; |
134 | tout1=tin[1]^xor1^inW1; |
135 | 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); } }; |
136 | xor0=tin0; |
137 | xor1=tin1; |
138 | } |
139 | |
140 | iv = &(*ivec)[0]; |
141 | 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)); |
142 | 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)); |
143 | } |
144 | 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' | |
145 | inW0=inW1=outW0=outW1=0; |
146 | tin[0]=tin[1]=0; |
147 | } |
148 |