File: | src/lib/libcrypto/des/ede_cbcm_enc.c |
Warning: | line 196, column 15 Although the value stored to 'tout0' is used in the enclosing expression, the value is never actually read from 'tout0' |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | /* $OpenBSD: ede_cbcm_enc.c,v 1.6 2014/10/28 07:35:58 jsg Exp $ */ |
2 | /* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL |
3 | * project 13 Feb 1999. |
4 | */ |
5 | /* ==================================================================== |
6 | * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in |
17 | * the documentation and/or other materials provided with the |
18 | * distribution. |
19 | * |
20 | * 3. All advertising materials mentioning features or use of this |
21 | * software must display the following acknowledgment: |
22 | * "This product includes software developed by the OpenSSL Project |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
24 | * |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
26 | * endorse or promote products derived from this software without |
27 | * prior written permission. For written permission, please contact |
28 | * licensing@OpenSSL.org. |
29 | * |
30 | * 5. Products derived from this software may not be called "OpenSSL" |
31 | * nor may "OpenSSL" appear in their names without prior written |
32 | * permission of the OpenSSL Project. |
33 | * |
34 | * 6. Redistributions of any form whatsoever must retain the following |
35 | * acknowledgment: |
36 | * "This product includes software developed by the OpenSSL Project |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
38 | * |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
51 | * ==================================================================== |
52 | * |
53 | * This product includes cryptographic software written by Eric Young |
54 | * (eay@cryptsoft.com). This product includes software written by Tim |
55 | * Hudson (tjh@cryptsoft.com). |
56 | * |
57 | */ |
58 | |
59 | /* |
60 | |
61 | This is an implementation of Triple DES Cipher Block Chaining with Output |
62 | Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom). |
63 | |
64 | Note that there is a known attack on this by Biham and Knudsen but it takes |
65 | a lot of work: |
66 | |
67 | http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz |
68 | |
69 | */ |
70 | |
71 | #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */ |
72 | |
73 | #ifndef OPENSSL_NO_DESCBCM |
74 | #include "des_locl.h" |
75 | |
76 | void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out, |
77 | long length, DES_key_schedule *ks1, DES_key_schedule *ks2, |
78 | DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2, |
79 | int enc) |
80 | { |
81 | DES_LONGunsigned int tin0,tin1; |
82 | DES_LONGunsigned int tout0,tout1,xor0,xor1,m0,m1; |
83 | long l=length; |
84 | DES_LONGunsigned int tin[2]; |
85 | unsigned char *iv1,*iv2; |
86 | |
87 | iv1 = &(*ivec1)[0]; |
88 | iv2 = &(*ivec2)[0]; |
89 | |
90 | if (enc) |
91 | { |
92 | c2l(iv1,m0)(m0 =((unsigned int)(*((iv1)++))) , m0|=((unsigned int)(*((iv1 )++)))<< 8L, m0|=((unsigned int)(*((iv1)++)))<<16L , m0|=((unsigned int)(*((iv1)++)))<<24L); |
93 | c2l(iv1,m1)(m1 =((unsigned int)(*((iv1)++))) , m1|=((unsigned int)(*((iv1 )++)))<< 8L, m1|=((unsigned int)(*((iv1)++)))<<16L , m1|=((unsigned int)(*((iv1)++)))<<24L); |
94 | c2l(iv2,tout0)(tout0 =((unsigned int)(*((iv2)++))) , tout0|=((unsigned int) (*((iv2)++)))<< 8L, tout0|=((unsigned int)(*((iv2)++))) <<16L, tout0|=((unsigned int)(*((iv2)++)))<<24L); |
95 | c2l(iv2,tout1)(tout1 =((unsigned int)(*((iv2)++))) , tout1|=((unsigned int) (*((iv2)++)))<< 8L, tout1|=((unsigned int)(*((iv2)++))) <<16L, tout1|=((unsigned int)(*((iv2)++)))<<24L); |
96 | for (l-=8; l>=-7; l-=8) |
97 | { |
98 | tin[0]=m0; |
99 | tin[1]=m1; |
100 | DES_encrypt1(tin,ks3,1); |
101 | m0=tin[0]; |
102 | m1=tin[1]; |
103 | |
104 | if(l < 0) |
105 | { |
106 | 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)))); } }; |
107 | } |
108 | else |
109 | { |
110 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
111 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
112 | } |
113 | tin0^=tout0; |
114 | tin1^=tout1; |
115 | |
116 | tin[0]=tin0; |
117 | tin[1]=tin1; |
118 | DES_encrypt1(tin,ks1,1); |
119 | tin[0]^=m0; |
120 | tin[1]^=m1; |
121 | DES_encrypt1(tin,ks2,0); |
122 | tin[0]^=m0; |
123 | tin[1]^=m1; |
124 | DES_encrypt1(tin,ks1,1); |
125 | tout0=tin[0]; |
126 | tout1=tin[1]; |
127 | |
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 | } |
131 | iv1=&(*ivec1)[0]; |
132 | l2c(m0,iv1)(*((iv1)++)=(unsigned char)(((m0) )&0xff), *((iv1)++)=(unsigned char)(((m0)>> 8L)&0xff), *((iv1)++)=(unsigned char )(((m0)>>16L)&0xff), *((iv1)++)=(unsigned char)(((m0 )>>24L)&0xff)); |
133 | l2c(m1,iv1)(*((iv1)++)=(unsigned char)(((m1) )&0xff), *((iv1)++)=(unsigned char)(((m1)>> 8L)&0xff), *((iv1)++)=(unsigned char )(((m1)>>16L)&0xff), *((iv1)++)=(unsigned char)(((m1 )>>24L)&0xff)); |
134 | |
135 | iv2=&(*ivec2)[0]; |
136 | l2c(tout0,iv2)(*((iv2)++)=(unsigned char)(((tout0) )&0xff), *((iv2)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((iv2)++)=(unsigned char)(((tout0)>>16L)&0xff), *((iv2)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
137 | l2c(tout1,iv2)(*((iv2)++)=(unsigned char)(((tout1) )&0xff), *((iv2)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((iv2)++)=(unsigned char)(((tout1)>>16L)&0xff), *((iv2)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
138 | } |
139 | else |
140 | { |
141 | DES_LONGunsigned int t0,t1; |
142 | |
143 | c2l(iv1,m0)(m0 =((unsigned int)(*((iv1)++))) , m0|=((unsigned int)(*((iv1 )++)))<< 8L, m0|=((unsigned int)(*((iv1)++)))<<16L , m0|=((unsigned int)(*((iv1)++)))<<24L); |
144 | c2l(iv1,m1)(m1 =((unsigned int)(*((iv1)++))) , m1|=((unsigned int)(*((iv1 )++)))<< 8L, m1|=((unsigned int)(*((iv1)++)))<<16L , m1|=((unsigned int)(*((iv1)++)))<<24L); |
145 | c2l(iv2,xor0)(xor0 =((unsigned int)(*((iv2)++))) , xor0|=((unsigned int)(* ((iv2)++)))<< 8L, xor0|=((unsigned int)(*((iv2)++)))<< 16L, xor0|=((unsigned int)(*((iv2)++)))<<24L); |
146 | c2l(iv2,xor1)(xor1 =((unsigned int)(*((iv2)++))) , xor1|=((unsigned int)(* ((iv2)++)))<< 8L, xor1|=((unsigned int)(*((iv2)++)))<< 16L, xor1|=((unsigned int)(*((iv2)++)))<<24L); |
147 | for (l-=8; l>=-7; l-=8) |
148 | { |
149 | tin[0]=m0; |
150 | tin[1]=m1; |
151 | DES_encrypt1(tin,ks3,1); |
152 | m0=tin[0]; |
153 | m1=tin[1]; |
154 | |
155 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
156 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
157 | |
158 | t0=tin0; |
159 | t1=tin1; |
160 | |
161 | tin[0]=tin0; |
162 | tin[1]=tin1; |
163 | DES_encrypt1(tin,ks1,0); |
164 | tin[0]^=m0; |
165 | tin[1]^=m1; |
166 | DES_encrypt1(tin,ks2,1); |
167 | tin[0]^=m0; |
168 | tin[1]^=m1; |
169 | DES_encrypt1(tin,ks1,0); |
170 | tout0=tin[0]; |
171 | tout1=tin[1]; |
172 | |
173 | tout0^=xor0; |
174 | tout1^=xor1; |
175 | if(l < 0) |
176 | { |
177 | 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); } }; |
178 | } |
179 | else |
180 | { |
181 | 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)); |
182 | 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)); |
183 | } |
184 | xor0=t0; |
185 | xor1=t1; |
186 | } |
187 | |
188 | iv1=&(*ivec1)[0]; |
189 | l2c(m0,iv1)(*((iv1)++)=(unsigned char)(((m0) )&0xff), *((iv1)++)=(unsigned char)(((m0)>> 8L)&0xff), *((iv1)++)=(unsigned char )(((m0)>>16L)&0xff), *((iv1)++)=(unsigned char)(((m0 )>>24L)&0xff)); |
190 | l2c(m1,iv1)(*((iv1)++)=(unsigned char)(((m1) )&0xff), *((iv1)++)=(unsigned char)(((m1)>> 8L)&0xff), *((iv1)++)=(unsigned char )(((m1)>>16L)&0xff), *((iv1)++)=(unsigned char)(((m1 )>>24L)&0xff)); |
191 | |
192 | iv2=&(*ivec2)[0]; |
193 | l2c(xor0,iv2)(*((iv2)++)=(unsigned char)(((xor0) )&0xff), *((iv2)++)=( unsigned char)(((xor0)>> 8L)&0xff), *((iv2)++)=(unsigned char)(((xor0)>>16L)&0xff), *((iv2)++)=(unsigned char )(((xor0)>>24L)&0xff)); |
194 | l2c(xor1,iv2)(*((iv2)++)=(unsigned char)(((xor1) )&0xff), *((iv2)++)=( unsigned char)(((xor1)>> 8L)&0xff), *((iv2)++)=(unsigned char)(((xor1)>>16L)&0xff), *((iv2)++)=(unsigned char )(((xor1)>>24L)&0xff)); |
195 | } |
196 | tin0=tin1=tout0=tout1=xor0=xor1=0; |
Although the value stored to 'tout0' is used in the enclosing expression, the value is never actually read from 'tout0' | |
197 | tin[0]=tin[1]=0; |
198 | } |
199 | #endif |