| File: | src/lib/libcrypto/des/pcbc_enc.c |
| Warning: | line 115, column 9 Although the value stored to 'sin1' is used in the enclosing expression, the value is never actually read from 'sin1' |
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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; |
Although the value stored to 'sin1' is used in the enclosing expression, the value is never actually read from 'sin1' | |
| 116 | } |