File: | src/lib/libcrypto/des/pcbc_enc.c |
Warning: | line 115, column 2 Value stored to 'sin0' is never read |
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1 | /* $OpenBSD: pcbc_enc.c,v 1.9 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 | void |
62 | DES_pcbc_encrypt(const unsigned char *input, unsigned char *output, |
63 | long length, DES_key_schedule *schedule, |
64 | DES_cblock *ivec, int enc) |
65 | { |
66 | DES_LONGunsigned int sin0, sin1, xor0, xor1, tout0, tout1; |
67 | DES_LONGunsigned int tin[2]; |
68 | const unsigned char *in; |
69 | unsigned char *out, *iv; |
70 | |
71 | in = input; |
72 | out = output; |
73 | iv = &(*ivec)[0]; |
74 | |
75 | if (enc) { |
76 | c2l(iv, xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); |
77 | c2l(iv, xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
78 | for (; length > 0; length -= 8) { |
79 | if (length >= 8) { |
80 | c2l(in, sin0)(sin0 =((unsigned int)(*((in)++))) , sin0|=((unsigned int)(*( (in)++)))<< 8L, sin0|=((unsigned int)(*((in)++)))<< 16L, sin0|=((unsigned int)(*((in)++)))<<24L); |
81 | c2l(in, sin1)(sin1 =((unsigned int)(*((in)++))) , sin1|=((unsigned int)(*( (in)++)))<< 8L, sin1|=((unsigned int)(*((in)++)))<< 16L, sin1|=((unsigned int)(*((in)++)))<<24L); |
82 | } else |
83 | c2ln(in, sin0, sin1, length){ in+=length; sin0=sin1=0; switch (length) { case 8: sin1 =(( unsigned int)(*(--(in))))<<24L; case 7: sin1|=((unsigned int)(*(--(in))))<<16L; case 6: sin1|=((unsigned int)(* (--(in))))<< 8L; case 5: sin1|=((unsigned int)(*(--(in) ))); case 4: sin0 =((unsigned int)(*(--(in))))<<24L; case 3: sin0|=((unsigned int)(*(--(in))))<<16L; case 2: sin0 |=((unsigned int)(*(--(in))))<< 8L; case 1: sin0|=((unsigned int)(*(--(in)))); } }; |
84 | tin[0] = sin0 ^ xor0; |
85 | tin[1] = sin1 ^ xor1; |
86 | DES_encrypt1((DES_LONGunsigned int *)tin, schedule, DES_ENCRYPT1); |
87 | tout0 = tin[0]; |
88 | tout1 = tin[1]; |
89 | xor0 = sin0 ^ tout0; |
90 | xor1 = sin1 ^ tout1; |
91 | 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)); |
92 | 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)); |
93 | } |
94 | } else { |
95 | c2l(iv, xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); |
96 | c2l(iv, xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
97 | for (; length > 0; length -= 8) { |
98 | c2l(in, sin0)(sin0 =((unsigned int)(*((in)++))) , sin0|=((unsigned int)(*( (in)++)))<< 8L, sin0|=((unsigned int)(*((in)++)))<< 16L, sin0|=((unsigned int)(*((in)++)))<<24L); |
99 | c2l(in, sin1)(sin1 =((unsigned int)(*((in)++))) , sin1|=((unsigned int)(*( (in)++)))<< 8L, sin1|=((unsigned int)(*((in)++)))<< 16L, sin1|=((unsigned int)(*((in)++)))<<24L); |
100 | tin[0] = sin0; |
101 | tin[1] = sin1; |
102 | DES_encrypt1((DES_LONGunsigned int *)tin, schedule, DES_DECRYPT0); |
103 | tout0 = tin[0] ^ xor0; |
104 | tout1 = tin[1] ^ xor1; |
105 | if (length >= 8) { |
106 | 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)); |
107 | 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)); |
108 | } else |
109 | l2cn(tout0, tout1, out, length){ out+=length; switch (length) { 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); } }; |
110 | xor0 = tout0 ^ sin0; |
111 | xor1 = tout1 ^ sin1; |
112 | } |
113 | } |
114 | tin[0] = tin[1] = 0; |
115 | sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0; |
Value stored to 'sin0' is never read | |
116 | } |