| 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 |