flawfinder/test/test.c

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/* Test flawfinder. This program won't compile or run; that's not necessary
for this to be a useful test. */
#include <stdio.h>
#define hello(x) goodbye(x)
#define WOKKA "stuff"
main() {
printf("hello\n");
}
/* This is a strcpy test. */
int demo(char *a, char *b) {
strcpy(a, "\n"); // Did this work?
strcpy(a, gettext("Hello there")); // Did this work?
strcpy(b, a);
sprintf(s, "\n");
sprintf(s, "hello");
sprintf(s, "hello %s", bug);
sprintf(s, gettext("hello %s"), bug);
sprintf(s, unknown, bug);
printf(bf, x);
scanf("%d", &x);
scanf("%s", s);
scanf("%10s", s);
scanf("%s", s);
gets(f); // Flawfinder: ignore
printf("\\");
/* Flawfinder: ignore */
gets(f);
gets(f);
/* These are okay, but flawfinder version < 0.20 incorrectly used
the first parameter as the parameter for the format string */
syslog(LOG_ERR,"cannot open config file (%s): %s",filename,strerror(errno))
syslog(LOG_CRIT,"malloc() failed");
/* But this one SHOULD trigger a warning. */
syslog(LOG_ERR, attacker_string);
}
demo2() {
char d[20];
char s[20];
int n;
_mbscpy(d,s); /* like strcpy, this doesn't check for buffer overflow */
memcpy(d,s); // fail - no size
memcpy(d, s, sizeof(d)); // pass
memcpy(& n, s, sizeof( n )); // pass
memcpy(&n,s,sizeof(s)); // fail - sizeof not of destination
memcpy(d,s,n); // fail - size unguessable
CopyMemory(d,s);
lstrcat(d,s);
strncpy(d,s);
_tcsncpy(d,s);
strncat(d,s,10);
strncat(d,s,sizeof(d)); /* Misuse - this should be flagged as riskier. */
_tcsncat(d,s,sizeof(d)); /* Misuse - flag as riskier */
n = strlen(d);
/* This is wrong, and should be flagged as risky: */
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof(wszUserName));
/* This is also wrong, and should be flagged as risky: */
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof wszUserName);
/* This is much better: */
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof(wszUserName)/sizeof(wszUserName[0]));
/* This is much better: */
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof wszUserName /sizeof(wszUserName[0]));
/* This is an example of bad code - the third paramer is NULL, so it creates
a NULL ACL. Note that Flawfinder can't detect when a
SECURITY_DESCRIPTOR structure is manually created with a NULL value
as the ACL; doing so would require a tool that handles C/C++
and knows about types more that flawfinder currently does.
Anyway, this needs to be detected: */
SetSecurityDescriptorDacl(&sd,TRUE,NULL,FALSE);
/* This one is a bad idea - first param shouldn't be NULL */
CreateProcess(NULL, "C:\\Program Files\\GoodGuy\\GoodGuy.exe -x", "");
/* Bad, may load from current directory */
(void) LoadLibraryEx(L"user32.dll", nullptr, LOAD_LIBRARY_AS_DATAFILE);
/* This should be ignored, since it's loading only from System32 */
(void) LoadLibraryEx(L"user32.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32 | LOAD_LIBRARY_REQUIRE_SIGNED_TARGET);
/* Test interaction of quote characters */
printf("%c\n", 'x');
printf("%c\n", '"');
printf("%c\n", '\"');
printf("%c\n", '\'');
printf("%c\n", '\177');
printf("%c\n", '\xfe');
printf("%c\n", '\xd');
printf("%c\n", '\n');
printf("%c\n", '\\');
printf("%c\n", "'");
}
int getopt_example(int argc,char *argv[]) {
while ((optc = getopt_long (argc, argv, "a",longopts, NULL )) != EOF) {
}
}
int testfile() {
FILE *f;
f = fopen("/etc/passwd", "r");
fclose(f);
}
/* Regression test: handle \\\n after end of string */
#define assert(x) {\
if (!(x)) {\
fprintf(stderr,"Assertion failed.\n"\
"File: %s\nLine: %d\n"\
"Assertion: %s\n\n"\
,__FILE__,__LINE__,#x);\
exit(1);\
};\
}
int accesstest() {
int access = 0; /* Not a function call. Should be caught by the
false positive test, and NOT labelled as a problem. */
}