Bug Summary

File:out/../deps/openssl/openssl/crypto/des/pcbc_enc.c
Warning:line 71, column 5
Value stored to 'sin0' 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 pcbc_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/pcbc_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 * DES low level APIs are deprecated for public use, but still ok for internal
12 * use.
13 */
14#include "internal/deprecated.h"
15
16#include "des_local.h"
17
18void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output,
19 long length, DES_key_schedule *schedule,
20 DES_cblock *ivec, int enc)
21{
22 register DES_LONG sin0, sin1, xor0, xor1, tout0, tout1;
23 DES_LONG tin[2];
24 const unsigned char *in;
25 unsigned char *out, *iv;
26
27 in = input;
28 out = output;
29 iv = &(*ivec)[0];
30
31 if (enc) {
32 c2l(iv, xor0)(xor0 =((DES_LONG)(*((iv)++))) , xor0|=((DES_LONG)(*((iv)++))
)<< 8L, xor0|=((DES_LONG)(*((iv)++)))<<16L, xor0|=
((DES_LONG)(*((iv)++)))<<24L);
33 c2l(iv, xor1)(xor1 =((DES_LONG)(*((iv)++))) , xor1|=((DES_LONG)(*((iv)++))
)<< 8L, xor1|=((DES_LONG)(*((iv)++)))<<16L, xor1|=
((DES_LONG)(*((iv)++)))<<24L);
34 for (; length > 0; length -= 8) {
35 if (length >= 8) {
36 c2l(in, sin0)(sin0 =((DES_LONG)(*((in)++))) , sin0|=((DES_LONG)(*((in)++))
)<< 8L, sin0|=((DES_LONG)(*((in)++)))<<16L, sin0|=
((DES_LONG)(*((in)++)))<<24L);
37 c2l(in, sin1)(sin1 =((DES_LONG)(*((in)++))) , sin1|=((DES_LONG)(*((in)++))
)<< 8L, sin1|=((DES_LONG)(*((in)++)))<<16L, sin1|=
((DES_LONG)(*((in)++)))<<24L);
38 } else
39 c2ln(in, sin0, sin1, length){ in+=length; sin0=sin1=0; switch (length) { case 8: sin1 =((
DES_LONG)(*(--(in))))<<24L; case 7: sin1|=((DES_LONG)(*
(--(in))))<<16L; case 6: sin1|=((DES_LONG)(*(--(in))))<<
8L; case 5: sin1|=((DES_LONG)(*(--(in)))); case 4: sin0 =((DES_LONG
)(*(--(in))))<<24L; case 3: sin0|=((DES_LONG)(*(--(in))
))<<16L; case 2: sin0|=((DES_LONG)(*(--(in))))<< 8L
; case 1: sin0|=((DES_LONG)(*(--(in)))); } };
40 tin[0] = sin0 ^ xor0;
41 tin[1] = sin1 ^ xor1;
42 DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT1);
43 tout0 = tin[0];
44 tout1 = tin[1];
45 xor0 = sin0 ^ tout0;
46 xor1 = sin1 ^ tout1;
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 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));
49 }
50 } else {
51 c2l(iv, xor0)(xor0 =((DES_LONG)(*((iv)++))) , xor0|=((DES_LONG)(*((iv)++))
)<< 8L, xor0|=((DES_LONG)(*((iv)++)))<<16L, xor0|=
((DES_LONG)(*((iv)++)))<<24L);
52 c2l(iv, xor1)(xor1 =((DES_LONG)(*((iv)++))) , xor1|=((DES_LONG)(*((iv)++))
)<< 8L, xor1|=((DES_LONG)(*((iv)++)))<<16L, xor1|=
((DES_LONG)(*((iv)++)))<<24L);
53 for (; length > 0; length -= 8) {
54 c2l(in, sin0)(sin0 =((DES_LONG)(*((in)++))) , sin0|=((DES_LONG)(*((in)++))
)<< 8L, sin0|=((DES_LONG)(*((in)++)))<<16L, sin0|=
((DES_LONG)(*((in)++)))<<24L);
55 c2l(in, sin1)(sin1 =((DES_LONG)(*((in)++))) , sin1|=((DES_LONG)(*((in)++))
)<< 8L, sin1|=((DES_LONG)(*((in)++)))<<16L, sin1|=
((DES_LONG)(*((in)++)))<<24L);
56 tin[0] = sin0;
57 tin[1] = sin1;
58 DES_encrypt1((DES_LONG *)tin, schedule, DES_DECRYPT0);
59 tout0 = tin[0] ^ xor0;
60 tout1 = tin[1] ^ xor1;
61 if (length >= 8) {
62 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));
63 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));
64 } else
65 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); } };
66 xor0 = tout0 ^ sin0;
67 xor1 = tout1 ^ sin1;
68 }
69 }
70 tin[0] = tin[1] = 0;
71 sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0;
Value stored to 'sin0' is never read
72}