Bug Summary

File:out/../deps/openssl/openssl/crypto/des/ncbc_enc.c
Warning:line 104, column 5
Value stored to 'tin0' is never read

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 des_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/des/des_enc.c
1/*
2 * Copyright 1998-2016 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 * #included by:
12 * cbc_enc.c (DES_cbc_encrypt)
13 * des_enc.c (DES_ncbc_encrypt)
14 */
15
16#include "des_local.h"
17
18#ifdef CBC_ENC_C__DONT_UPDATE_IV
19void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
20 DES_key_schedule *_schedule, DES_cblock *ivec, int enc)
21#else
22void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out,
23 long length, DES_key_schedule *_schedule,
24 DES_cblock *ivec, int enc)
25#endif
26{
27 register DES_LONG tin0, tin1;
28 register DES_LONG tout0, tout1, xor0, xor1;
29 register long l = length;
30 DES_LONG tin[2];
31 unsigned char *iv;
32
33 iv = &(*ivec)[0];
34
35 if (enc) {
36 c2l(iv, tout0)(tout0 =((DES_LONG)(*((iv)++))) , tout0|=((DES_LONG)(*((iv)++
)))<< 8L, tout0|=((DES_LONG)(*((iv)++)))<<16L, tout0
|=((DES_LONG)(*((iv)++)))<<24L);
37 c2l(iv, tout1)(tout1 =((DES_LONG)(*((iv)++))) , tout1|=((DES_LONG)(*((iv)++
)))<< 8L, tout1|=((DES_LONG)(*((iv)++)))<<16L, tout1
|=((DES_LONG)(*((iv)++)))<<24L);
38 for (l -= 8; l >= 0; l -= 8) {
39 c2l(in, tin0)(tin0 =((DES_LONG)(*((in)++))) , tin0|=((DES_LONG)(*((in)++))
)<< 8L, tin0|=((DES_LONG)(*((in)++)))<<16L, tin0|=
((DES_LONG)(*((in)++)))<<24L);
40 c2l(in, tin1)(tin1 =((DES_LONG)(*((in)++))) , tin1|=((DES_LONG)(*((in)++))
)<< 8L, tin1|=((DES_LONG)(*((in)++)))<<16L, tin1|=
((DES_LONG)(*((in)++)))<<24L);
41 tin0 ^= tout0;
42 tin[0] = tin0;
43 tin1 ^= tout1;
44 tin[1] = tin1;
45 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT1);
46 tout0 = tin[0];
47 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));
48 tout1 = tin[1];
49 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));
50 }
51 if (l != -8) {
52 c2ln(in, tin0, tin1, l + 8){ in+=l + 8; tin0=tin1=0; switch (l + 8) { case 8: tin1 =((DES_LONG
)(*(--(in))))<<24L; case 7: tin1|=((DES_LONG)(*(--(in))
))<<16L; case 6: tin1|=((DES_LONG)(*(--(in))))<< 8L
; case 5: tin1|=((DES_LONG)(*(--(in)))); case 4: tin0 =((DES_LONG
)(*(--(in))))<<24L; case 3: tin0|=((DES_LONG)(*(--(in))
))<<16L; case 2: tin0|=((DES_LONG)(*(--(in))))<< 8L
; case 1: tin0|=((DES_LONG)(*(--(in)))); } };
53 tin0 ^= tout0;
54 tin[0] = tin0;
55 tin1 ^= tout1;
56 tin[1] = tin1;
57 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT1);
58 tout0 = tin[0];
59 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));
60 tout1 = tin[1];
61 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));
62 }
63#ifndef CBC_ENC_C__DONT_UPDATE_IV
64 iv = &(*ivec)[0];
65 l2c(tout0, iv)(*((iv)++)=(unsigned char)(((tout0) )&0xff), *((iv)++)=(unsigned
char)(((tout0)>> 8L)&0xff), *((iv)++)=(unsigned char
)(((tout0)>>16L)&0xff), *((iv)++)=(unsigned char)((
(tout0)>>24L)&0xff));
66 l2c(tout1, iv)(*((iv)++)=(unsigned char)(((tout1) )&0xff), *((iv)++)=(unsigned
char)(((tout1)>> 8L)&0xff), *((iv)++)=(unsigned char
)(((tout1)>>16L)&0xff), *((iv)++)=(unsigned char)((
(tout1)>>24L)&0xff));
67#endif
68 } else {
69 c2l(iv, xor0)(xor0 =((DES_LONG)(*((iv)++))) , xor0|=((DES_LONG)(*((iv)++))
)<< 8L, xor0|=((DES_LONG)(*((iv)++)))<<16L, xor0|=
((DES_LONG)(*((iv)++)))<<24L);
70 c2l(iv, xor1)(xor1 =((DES_LONG)(*((iv)++))) , xor1|=((DES_LONG)(*((iv)++))
)<< 8L, xor1|=((DES_LONG)(*((iv)++)))<<16L, xor1|=
((DES_LONG)(*((iv)++)))<<24L);
71 for (l -= 8; l >= 0; l -= 8) {
72 c2l(in, tin0)(tin0 =((DES_LONG)(*((in)++))) , tin0|=((DES_LONG)(*((in)++))
)<< 8L, tin0|=((DES_LONG)(*((in)++)))<<16L, tin0|=
((DES_LONG)(*((in)++)))<<24L);
73 tin[0] = tin0;
74 c2l(in, tin1)(tin1 =((DES_LONG)(*((in)++))) , tin1|=((DES_LONG)(*((in)++))
)<< 8L, tin1|=((DES_LONG)(*((in)++)))<<16L, tin1|=
((DES_LONG)(*((in)++)))<<24L);
75 tin[1] = tin1;
76 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT0);
77 tout0 = tin[0] ^ xor0;
78 tout1 = tin[1] ^ xor1;
79 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));
80 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));
81 xor0 = tin0;
82 xor1 = tin1;
83 }
84 if (l != -8) {
85 c2l(in, tin0)(tin0 =((DES_LONG)(*((in)++))) , tin0|=((DES_LONG)(*((in)++))
)<< 8L, tin0|=((DES_LONG)(*((in)++)))<<16L, tin0|=
((DES_LONG)(*((in)++)))<<24L);
86 tin[0] = tin0;
87 c2l(in, tin1)(tin1 =((DES_LONG)(*((in)++))) , tin1|=((DES_LONG)(*((in)++))
)<< 8L, tin1|=((DES_LONG)(*((in)++)))<<16L, tin1|=
((DES_LONG)(*((in)++)))<<24L);
88 tin[1] = tin1;
89 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT0);
90 tout0 = tin[0] ^ xor0;
91 tout1 = tin[1] ^ xor1;
92 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); } };
93#ifndef CBC_ENC_C__DONT_UPDATE_IV
94 xor0 = tin0;
95 xor1 = tin1;
96#endif
97 }
98#ifndef CBC_ENC_C__DONT_UPDATE_IV
99 iv = &(*ivec)[0];
100 l2c(xor0, iv)(*((iv)++)=(unsigned char)(((xor0) )&0xff), *((iv)++)=(unsigned
char)(((xor0)>> 8L)&0xff), *((iv)++)=(unsigned char
)(((xor0)>>16L)&0xff), *((iv)++)=(unsigned char)(((
xor0)>>24L)&0xff));
101 l2c(xor1, iv)(*((iv)++)=(unsigned char)(((xor1) )&0xff), *((iv)++)=(unsigned
char)(((xor1)>> 8L)&0xff), *((iv)++)=(unsigned char
)(((xor1)>>16L)&0xff), *((iv)++)=(unsigned char)(((
xor1)>>24L)&0xff));
102#endif
103 }
104 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
Value stored to 'tin0' is never read
105 tin[0] = tin[1] = 0;
106}