Bug Summary

File:out/../deps/openssl/openssl/crypto/bf/bf_enc.c
Warning:line 179, column 42
Although the value stored to 'xor1' is used in the enclosing expression, the value is never actually read from 'xor1'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name bf_enc.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/home/maurizio/node-v18.6.0/out -resource-dir /usr/local/lib/clang/16.0.0 -D V8_DEPRECATION_WARNINGS -D V8_IMMINENT_DEPRECATION_WARNINGS -D _GLIBCXX_USE_CXX11_ABI=1 -D NODE_OPENSSL_CONF_NAME=nodejs_conf -D NODE_OPENSSL_HAS_QUIC -D __STDC_FORMAT_MACROS -D OPENSSL_NO_PINSHARED -D OPENSSL_THREADS -D OPENSSL_NO_HW -D OPENSSL_API_COMPAT=0x10100001L -D STATIC_LEGACY -D NDEBUG -D OPENSSL_USE_NODELETE -D L_ENDIAN -D OPENSSL_BUILDING_OPENSSL -D AES_ASM -D BSAES_ASM -D CMLL_ASM -D ECP_NISTZ256_ASM -D GHASH_ASM -D KECCAK1600_ASM -D MD5_ASM -D OPENSSL_BN_ASM_GF2m -D OPENSSL_BN_ASM_MONT -D OPENSSL_BN_ASM_MONT5 -D OPENSSL_CPUID_OBJ -D OPENSSL_IA32_SSE2 -D PADLOCK_ASM -D POLY1305_ASM -D SHA1_ASM -D SHA256_ASM -D SHA512_ASM -D VPAES_ASM -D WHIRLPOOL_ASM -D X25519_ASM -D OPENSSL_PIC -D MODULESDIR="/home/maurizio/node-v18.6.0/out/Release/obj.target/deps/openssl/lib/openssl-modules" -D OPENSSLDIR="/home/maurizio/node-v18.6.0/out/Release/obj.target/deps/openssl" -D OPENSSLDIR="/etc/ssl" -D ENGINESDIR="/dev/null" -D TERMIOS -I ../deps/openssl/openssl -I ../deps/openssl/openssl/include -I ../deps/openssl/openssl/crypto -I ../deps/openssl/openssl/crypto/include -I ../deps/openssl/openssl/crypto/modes -I ../deps/openssl/openssl/crypto/ec/curve448 -I ../deps/openssl/openssl/crypto/ec/curve448/arch_32 -I ../deps/openssl/openssl/providers/common/include -I ../deps/openssl/openssl/providers/implementations/include -I ../deps/openssl/config -I ../deps/openssl/config/archs/linux-x86_64/asm -I ../deps/openssl/config/archs/linux-x86_64/asm/include -I ../deps/openssl/config/archs/linux-x86_64/asm/crypto -I ../deps/openssl/config/archs/linux-x86_64/asm/crypto/include/internal -I ../deps/openssl/config/archs/linux-x86_64/asm/providers/common/include -internal-isystem /usr/local/lib/clang/16.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../x86_64-redhat-linux/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-missing-field-initializers -Wno-old-style-declaration -fdebug-compilation-dir=/home/maurizio/node-v18.6.0/out -ferror-limit 19 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-08-22-142216-507842-1 -x c ../deps/openssl/openssl/crypto/bf/bf_enc.c
1/*
2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/*
11 * BF low level APIs are deprecated for public use, but still ok for internal
12 * use.
13 */
14#include "internal/deprecated.h"
15
16#include <openssl/blowfish.h>
17#include "bf_local.h"
18
19/*
20 * Blowfish as implemented from 'Blowfish: Springer-Verlag paper' (From
21 * LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, CAMBRIDGE
22 * SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
23 */
24
25#if (BF_ROUNDS16 != 16) && (BF_ROUNDS16 != 20)
26# error If you set BF_ROUNDS16 to some value other than 16 or 20, you will have \
27to modify the code.
28#endif
29
30void BF_encrypt(BF_LONGunsigned int *data, const BF_KEY *key)
31{
32 register BF_LONGunsigned int l, r;
33 register const BF_LONGunsigned int *p, *s;
34
35 p = key->P;
36 s = &(key->S[0]);
37 l = data[0];
38 r = data[1];
39
40 l ^= p[0];
41 BF_ENC(r, l, s, p[1])( r^=p[1], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
42 BF_ENC(l, r, s, p[2])( l^=p[2], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
43 BF_ENC(r, l, s, p[3])( r^=p[3], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
44 BF_ENC(l, r, s, p[4])( l^=p[4], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
45 BF_ENC(r, l, s, p[5])( r^=p[5], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
46 BF_ENC(l, r, s, p[6])( l^=p[6], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
47 BF_ENC(r, l, s, p[7])( r^=p[7], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
48 BF_ENC(l, r, s, p[8])( l^=p[8], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
49 BF_ENC(r, l, s, p[9])( r^=p[9], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
50 BF_ENC(l, r, s, p[10])( l^=p[10], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
51 BF_ENC(r, l, s, p[11])( r^=p[11], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
52 BF_ENC(l, r, s, p[12])( l^=p[12], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
53 BF_ENC(r, l, s, p[13])( r^=p[13], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
54 BF_ENC(l, r, s, p[14])( l^=p[14], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
55 BF_ENC(r, l, s, p[15])( r^=p[15], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
56 BF_ENC(l, r, s, p[16])( l^=p[16], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
57# if BF_ROUNDS16 == 20
58 BF_ENC(r, l, s, p[17])( r^=p[17], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
59 BF_ENC(l, r, s, p[18])( l^=p[18], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
60 BF_ENC(r, l, s, p[19])( r^=p[19], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
61 BF_ENC(l, r, s, p[20])( l^=p[20], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
62# endif
63 r ^= p[BF_ROUNDS16 + 1];
64
65 data[1] = l & 0xffffffffU;
66 data[0] = r & 0xffffffffU;
67}
68
69void BF_decrypt(BF_LONGunsigned int *data, const BF_KEY *key)
70{
71 register BF_LONGunsigned int l, r;
72 register const BF_LONGunsigned int *p, *s;
73
74 p = key->P;
75 s = &(key->S[0]);
76 l = data[0];
77 r = data[1];
78
79 l ^= p[BF_ROUNDS16 + 1];
80# if BF_ROUNDS16 == 20
81 BF_ENC(r, l, s, p[20])( r^=p[20], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
82 BF_ENC(l, r, s, p[19])( l^=p[19], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
83 BF_ENC(r, l, s, p[18])( r^=p[18], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
84 BF_ENC(l, r, s, p[17])( l^=p[17], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
85# endif
86 BF_ENC(r, l, s, p[16])( r^=p[16], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
87 BF_ENC(l, r, s, p[15])( l^=p[15], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
88 BF_ENC(r, l, s, p[14])( r^=p[14], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
89 BF_ENC(l, r, s, p[13])( l^=p[13], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
90 BF_ENC(r, l, s, p[12])( r^=p[12], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
91 BF_ENC(l, r, s, p[11])( l^=p[11], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((
r>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])
+ s[0x0300+((r )&0xff)])&0xffffffffU );
92 BF_ENC(r, l, s, p[10])( r^=p[10], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((
l>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])
+ s[0x0300+((l )&0xff)])&0xffffffffU );
93 BF_ENC(l, r, s, p[9])( l^=p[9], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
94 BF_ENC(r, l, s, p[8])( r^=p[8], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
95 BF_ENC(l, r, s, p[7])( l^=p[7], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
96 BF_ENC(r, l, s, p[6])( r^=p[6], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
97 BF_ENC(l, r, s, p[5])( l^=p[5], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
98 BF_ENC(r, l, s, p[4])( r^=p[4], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
99 BF_ENC(l, r, s, p[3])( l^=p[3], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
100 BF_ENC(r, l, s, p[2])( r^=p[2], r^=((( s[ ((l>>24)&0xff)] + s[0x0100+((l
>>16)&0xff)])^ s[0x0200+((l>> 8)&0xff)])+
s[0x0300+((l )&0xff)])&0xffffffffU );
101 BF_ENC(l, r, s, p[1])( l^=p[1], l^=((( s[ ((r>>24)&0xff)] + s[0x0100+((r
>>16)&0xff)])^ s[0x0200+((r>> 8)&0xff)])+
s[0x0300+((r )&0xff)])&0xffffffffU );
102 r ^= p[0];
103
104 data[1] = l & 0xffffffffU;
105 data[0] = r & 0xffffffffU;
106}
107
108void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
109 const BF_KEY *schedule, unsigned char *ivec, int encrypt)
110{
111 register BF_LONGunsigned int tin0, tin1;
112 register BF_LONGunsigned int tout0, tout1, xor0, xor1;
113 register long l = length;
114 BF_LONGunsigned int tin[2];
115
116 if (encrypt) {
117 n2l(ivec, tout0)(tout0 =((unsigned long)(*((ivec)++)))<<24L, tout0|=((unsigned
long)(*((ivec)++)))<<16L, tout0|=((unsigned long)(*((ivec
)++)))<< 8L, tout0|=((unsigned long)(*((ivec)++))));
118 n2l(ivec, tout1)(tout1 =((unsigned long)(*((ivec)++)))<<24L, tout1|=((unsigned
long)(*((ivec)++)))<<16L, tout1|=((unsigned long)(*((ivec
)++)))<< 8L, tout1|=((unsigned long)(*((ivec)++))));
119 ivec -= 8;
120 for (l -= 8; l >= 0; l -= 8) {
121 n2l(in, tin0)(tin0 =((unsigned long)(*((in)++)))<<24L, tin0|=((unsigned
long)(*((in)++)))<<16L, tin0|=((unsigned long)(*((in)++
)))<< 8L, tin0|=((unsigned long)(*((in)++))));
122 n2l(in, tin1)(tin1 =((unsigned long)(*((in)++)))<<24L, tin1|=((unsigned
long)(*((in)++)))<<16L, tin1|=((unsigned long)(*((in)++
)))<< 8L, tin1|=((unsigned long)(*((in)++))));
123 tin0 ^= tout0;
124 tin1 ^= tout1;
125 tin[0] = tin0;
126 tin[1] = tin1;
127 BF_encrypt(tin, schedule);
128 tout0 = tin[0];
129 tout1 = tin[1];
130 l2n(tout0, out)(*((out)++)=(unsigned char)(((tout0)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout0) )&0xff));
131 l2n(tout1, out)(*((out)++)=(unsigned char)(((tout1)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout1) )&0xff));
132 }
133 if (l != -8) {
134 n2ln(in, tin0, tin1, l + 8){ in+=l + 8; tin0=tin1=0; switch (l + 8) { case 8: tin1 =((unsigned
long)(*(--(in)))) ; case 7: tin1|=((unsigned long)(*(--(in))
))<< 8; case 6: tin1|=((unsigned long)(*(--(in))))<<
16; case 5: tin1|=((unsigned long)(*(--(in))))<<24; case
4: tin0 =((unsigned long)(*(--(in)))) ; case 3: tin0|=((unsigned
long)(*(--(in))))<< 8; case 2: tin0|=((unsigned long)(
*(--(in))))<<16; case 1: tin0|=((unsigned long)(*(--(in
))))<<24; } };
135 tin0 ^= tout0;
136 tin1 ^= tout1;
137 tin[0] = tin0;
138 tin[1] = tin1;
139 BF_encrypt(tin, schedule);
140 tout0 = tin[0];
141 tout1 = tin[1];
142 l2n(tout0, out)(*((out)++)=(unsigned char)(((tout0)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout0) )&0xff));
143 l2n(tout1, out)(*((out)++)=(unsigned char)(((tout1)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout1) )&0xff));
144 }
145 l2n(tout0, ivec)(*((ivec)++)=(unsigned char)(((tout0)>>24L)&0xff), *
((ivec)++)=(unsigned char)(((tout0)>>16L)&0xff), *(
(ivec)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((
ivec)++)=(unsigned char)(((tout0) )&0xff));
146 l2n(tout1, ivec)(*((ivec)++)=(unsigned char)(((tout1)>>24L)&0xff), *
((ivec)++)=(unsigned char)(((tout1)>>16L)&0xff), *(
(ivec)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((
ivec)++)=(unsigned char)(((tout1) )&0xff));
147 } else {
148 n2l(ivec, xor0)(xor0 =((unsigned long)(*((ivec)++)))<<24L, xor0|=((unsigned
long)(*((ivec)++)))<<16L, xor0|=((unsigned long)(*((ivec
)++)))<< 8L, xor0|=((unsigned long)(*((ivec)++))));
149 n2l(ivec, xor1)(xor1 =((unsigned long)(*((ivec)++)))<<24L, xor1|=((unsigned
long)(*((ivec)++)))<<16L, xor1|=((unsigned long)(*((ivec
)++)))<< 8L, xor1|=((unsigned long)(*((ivec)++))));
150 ivec -= 8;
151 for (l -= 8; l >= 0; l -= 8) {
152 n2l(in, tin0)(tin0 =((unsigned long)(*((in)++)))<<24L, tin0|=((unsigned
long)(*((in)++)))<<16L, tin0|=((unsigned long)(*((in)++
)))<< 8L, tin0|=((unsigned long)(*((in)++))));
153 n2l(in, tin1)(tin1 =((unsigned long)(*((in)++)))<<24L, tin1|=((unsigned
long)(*((in)++)))<<16L, tin1|=((unsigned long)(*((in)++
)))<< 8L, tin1|=((unsigned long)(*((in)++))));
154 tin[0] = tin0;
155 tin[1] = tin1;
156 BF_decrypt(tin, schedule);
157 tout0 = tin[0] ^ xor0;
158 tout1 = tin[1] ^ xor1;
159 l2n(tout0, out)(*((out)++)=(unsigned char)(((tout0)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout0) )&0xff));
160 l2n(tout1, out)(*((out)++)=(unsigned char)(((tout1)>>24L)&0xff), *
((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((
out)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((out
)++)=(unsigned char)(((tout1) )&0xff));
161 xor0 = tin0;
162 xor1 = tin1;
163 }
164 if (l != -8) {
165 n2l(in, tin0)(tin0 =((unsigned long)(*((in)++)))<<24L, tin0|=((unsigned
long)(*((in)++)))<<16L, tin0|=((unsigned long)(*((in)++
)))<< 8L, tin0|=((unsigned long)(*((in)++))));
166 n2l(in, tin1)(tin1 =((unsigned long)(*((in)++)))<<24L, tin1|=((unsigned
long)(*((in)++)))<<16L, tin1|=((unsigned long)(*((in)++
)))<< 8L, tin1|=((unsigned long)(*((in)++))));
167 tin[0] = tin0;
168 tin[1] = tin1;
169 BF_decrypt(tin, schedule);
170 tout0 = tin[0] ^ xor0;
171 tout1 = tin[1] ^ xor1;
172 l2nn(tout0, tout1, out, l + 8){ out+=l + 8; switch (l + 8) { case 8: *(--(out))=(unsigned char
)(((tout1) )&0xff); case 7: *(--(out))=(unsigned char)(((
tout1)>> 8)&0xff); case 6: *(--(out))=(unsigned char
)(((tout1)>>16)&0xff); case 5: *(--(out))=(unsigned
char)(((tout1)>>24)&0xff); case 4: *(--(out))=(unsigned
char)(((tout0) )&0xff); case 3: *(--(out))=(unsigned char
)(((tout0)>> 8)&0xff); case 2: *(--(out))=(unsigned
char)(((tout0)>>16)&0xff); case 1: *(--(out))=(unsigned
char)(((tout0)>>24)&0xff); } };
173 xor0 = tin0;
174 xor1 = tin1;
175 }
176 l2n(xor0, ivec)(*((ivec)++)=(unsigned char)(((xor0)>>24L)&0xff), *
((ivec)++)=(unsigned char)(((xor0)>>16L)&0xff), *((
ivec)++)=(unsigned char)(((xor0)>> 8L)&0xff), *((ivec
)++)=(unsigned char)(((xor0) )&0xff));
177 l2n(xor1, ivec)(*((ivec)++)=(unsigned char)(((xor1)>>24L)&0xff), *
((ivec)++)=(unsigned char)(((xor1)>>16L)&0xff), *((
ivec)++)=(unsigned char)(((xor1)>> 8L)&0xff), *((ivec
)++)=(unsigned char)(((xor1) )&0xff));
178 }
179 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'
180 tin[0] = tin[1] = 0;
181}