File: | src/lib/libcrypto/des/pcbc_enc.c |
Warning: | line 122, column 2 Value stored to 'sin0' is never read |
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1 | /* $OpenBSD: pcbc_enc.c,v 1.6 2014/10/28 07:35:58 jsg 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 | void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output, |
62 | long length, DES_key_schedule *schedule, |
63 | DES_cblock *ivec, int enc) |
64 | { |
65 | DES_LONGunsigned int sin0,sin1,xor0,xor1,tout0,tout1; |
66 | DES_LONGunsigned int tin[2]; |
67 | const unsigned char *in; |
68 | unsigned char *out,*iv; |
69 | |
70 | in=input; |
71 | out=output; |
72 | iv = &(*ivec)[0]; |
73 | |
74 | if (enc) |
75 | { |
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 | { |
80 | if (length >= 8) |
81 | { |
82 | c2l(in,sin0)(sin0 =((unsigned int)(*((in)++))) , sin0|=((unsigned int)(*( (in)++)))<< 8L, sin0|=((unsigned int)(*((in)++)))<< 16L, sin0|=((unsigned int)(*((in)++)))<<24L); |
83 | c2l(in,sin1)(sin1 =((unsigned int)(*((in)++))) , sin1|=((unsigned int)(*( (in)++)))<< 8L, sin1|=((unsigned int)(*((in)++)))<< 16L, sin1|=((unsigned int)(*((in)++)))<<24L); |
84 | } |
85 | else |
86 | 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)))); } }; |
87 | tin[0]=sin0^xor0; |
88 | tin[1]=sin1^xor1; |
89 | DES_encrypt1((DES_LONGunsigned int *)tin,schedule,DES_ENCRYPT1); |
90 | tout0=tin[0]; |
91 | tout1=tin[1]; |
92 | xor0=sin0^tout0; |
93 | xor1=sin1^tout1; |
94 | 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)); |
95 | 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)); |
96 | } |
97 | } |
98 | else |
99 | { |
100 | c2l(iv,xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); c2l(iv,xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
101 | for (; length>0; length-=8) |
102 | { |
103 | c2l(in,sin0)(sin0 =((unsigned int)(*((in)++))) , sin0|=((unsigned int)(*( (in)++)))<< 8L, sin0|=((unsigned int)(*((in)++)))<< 16L, sin0|=((unsigned int)(*((in)++)))<<24L); |
104 | c2l(in,sin1)(sin1 =((unsigned int)(*((in)++))) , sin1|=((unsigned int)(*( (in)++)))<< 8L, sin1|=((unsigned int)(*((in)++)))<< 16L, sin1|=((unsigned int)(*((in)++)))<<24L); |
105 | tin[0]=sin0; |
106 | tin[1]=sin1; |
107 | DES_encrypt1((DES_LONGunsigned int *)tin,schedule,DES_DECRYPT0); |
108 | tout0=tin[0]^xor0; |
109 | tout1=tin[1]^xor1; |
110 | if (length >= 8) |
111 | { |
112 | 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)); |
113 | 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)); |
114 | } |
115 | else |
116 | 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); } }; |
117 | xor0=tout0^sin0; |
118 | xor1=tout1^sin1; |
119 | } |
120 | } |
121 | tin[0]=tin[1]=0; |
122 | sin0=sin1=xor0=xor1=tout0=tout1=0; |
Value stored to 'sin0' is never read | |
123 | } |