File: | src/lib/libcrypto/des/ede_cbcm_enc.c |
Warning: | line 186, column 39 Although the value stored to 'xor1' is used in the enclosing expression, the value is never actually read from 'xor1' |
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1 | /* $OpenBSD: ede_cbcm_enc.c,v 1.9 2023/07/08 07:34:34 jsing 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_local.h" |
75 | |
76 | void |
77 | DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out, |
78 | long length, DES_key_schedule *ks1, DES_key_schedule *ks2, |
79 | DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2, |
80 | int enc) |
81 | { |
82 | DES_LONGunsigned int tin0, tin1; |
83 | DES_LONGunsigned int tout0, tout1, xor0, xor1, m0, m1; |
84 | long l = length; |
85 | DES_LONGunsigned int tin[2]; |
86 | unsigned char *iv1, *iv2; |
87 | |
88 | iv1 = &(*ivec1)[0]; |
89 | iv2 = &(*ivec2)[0]; |
90 | |
91 | if (enc) { |
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 | tin[0] = m0; |
98 | tin[1] = m1; |
99 | DES_encrypt1(tin, ks3, 1); |
100 | m0 = tin[0]; |
101 | m1 = tin[1]; |
102 | |
103 | if (l < 0) { |
104 | 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)))); } }; |
105 | } else { |
106 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
107 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
108 | } |
109 | tin0 ^= tout0; |
110 | tin1 ^= tout1; |
111 | |
112 | tin[0] = tin0; |
113 | tin[1] = tin1; |
114 | DES_encrypt1(tin, ks1, 1); |
115 | tin[0] ^= m0; |
116 | tin[1] ^= m1; |
117 | DES_encrypt1(tin, ks2, 0); |
118 | tin[0] ^= m0; |
119 | tin[1] ^= m1; |
120 | DES_encrypt1(tin, ks1, 1); |
121 | tout0 = tin[0]; |
122 | tout1 = tin[1]; |
123 | |
124 | 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)); |
125 | 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)); |
126 | } |
127 | iv1 = &(*ivec1)[0]; |
128 | 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)); |
129 | 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)); |
130 | |
131 | iv2 = &(*ivec2)[0]; |
132 | 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)); |
133 | 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)); |
134 | } else { |
135 | DES_LONGunsigned int t0, t1; |
136 | |
137 | c2l(iv1, m0)(m0 =((unsigned int)(*((iv1)++))) , m0|=((unsigned int)(*((iv1 )++)))<< 8L, m0|=((unsigned int)(*((iv1)++)))<<16L , m0|=((unsigned int)(*((iv1)++)))<<24L); |
138 | c2l(iv1, m1)(m1 =((unsigned int)(*((iv1)++))) , m1|=((unsigned int)(*((iv1 )++)))<< 8L, m1|=((unsigned int)(*((iv1)++)))<<16L , m1|=((unsigned int)(*((iv1)++)))<<24L); |
139 | c2l(iv2, xor0)(xor0 =((unsigned int)(*((iv2)++))) , xor0|=((unsigned int)(* ((iv2)++)))<< 8L, xor0|=((unsigned int)(*((iv2)++)))<< 16L, xor0|=((unsigned int)(*((iv2)++)))<<24L); |
140 | c2l(iv2, xor1)(xor1 =((unsigned int)(*((iv2)++))) , xor1|=((unsigned int)(* ((iv2)++)))<< 8L, xor1|=((unsigned int)(*((iv2)++)))<< 16L, xor1|=((unsigned int)(*((iv2)++)))<<24L); |
141 | for (l -= 8; l >= -7; l -= 8) { |
142 | tin[0] = m0; |
143 | tin[1] = m1; |
144 | DES_encrypt1(tin, ks3, 1); |
145 | m0 = tin[0]; |
146 | m1 = tin[1]; |
147 | |
148 | c2l(in, tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
149 | c2l(in, tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
150 | |
151 | t0 = tin0; |
152 | t1 = tin1; |
153 | |
154 | tin[0] = tin0; |
155 | tin[1] = tin1; |
156 | DES_encrypt1(tin, ks1, 0); |
157 | tin[0] ^= m0; |
158 | tin[1] ^= m1; |
159 | DES_encrypt1(tin, ks2, 1); |
160 | tin[0] ^= m0; |
161 | tin[1] ^= m1; |
162 | DES_encrypt1(tin, ks1, 0); |
163 | tout0 = tin[0]; |
164 | tout1 = tin[1]; |
165 | |
166 | tout0 ^= xor0; |
167 | tout1 ^= xor1; |
168 | if (l < 0) { |
169 | 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); } }; |
170 | } else { |
171 | 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)); |
172 | 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)); |
173 | } |
174 | xor0 = t0; |
175 | xor1 = t1; |
176 | } |
177 | |
178 | iv1 = &(*ivec1)[0]; |
179 | 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)); |
180 | 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)); |
181 | |
182 | iv2 = &(*ivec2)[0]; |
183 | 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)); |
184 | 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)); |
185 | } |
186 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; |
Although the value stored to 'xor1' is used in the enclosing expression, the value is never actually read from 'xor1' | |
187 | tin[0] = tin[1] = 0; |
188 | } |
189 | #endif |