1 // RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-check-security-syntactic %s -verify
3 // <rdar://problem/6336718> rule request: floating point used as loop
4 // condition (FLP30-C, FLP-30-CPP)
6 // For reference: https://www.securecoding.cert.org/confluence/display/seccode/FLP30-C.+Do+not+use+floating+point+variables+as+loop+counters
8 void test_float_condition() {
9 for (float x = 0.1f; x <= 1.0f; x += 0.1f) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
10 for (float x = 100000001.0f; x <= 100000010.0f; x += 1.0f) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
11 for (float x = 100000001.0f; x <= 100000010.0f; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
12 for (double x = 100000001.0; x <= 100000010.0; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
13 for (double x = 100000001.0; ((x)) <= 100000010.0; ((x))++ ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
15 for (double x = 100000001.0; 100000010.0 >= x; x = x + 1.0 ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
18 for (double x = 100000001.0; ((x)) <= 100000010.0; ((x))++, ++i ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
20 typedef float FooType;
21 for (FooType x = 100000001.0f; x <= 100000010.0f; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'FooType'}}
24 // <rdar://problem/6335715> rule request: gets() buffer overflow
25 // Part of recommendation: 300-BSI (buildsecurityin.us-cert.gov)
26 char* gets(char *buf);
30 gets(buff); // expected-warning{{Call to function 'gets' is extremely insecure as it can always result in a buffer overflow}}
33 int getpw(unsigned int uid, char *buf);
37 getpw(2, buff); // expected-warning{{The getpw() function is dangerous as it may overflow the provided buffer. It is obsoleted by getpwuid().}}
40 // <rdar://problem/6337132> CWE-273: Failure to Check Whether Privileges Were
41 // Dropped Successfully
42 typedef unsigned int __uint32_t;
43 typedef __uint32_t __darwin_uid_t;
44 typedef __uint32_t __darwin_gid_t;
45 typedef __darwin_uid_t uid_t;
46 typedef __darwin_gid_t gid_t;
48 int setregid(gid_t, gid_t);
49 int setreuid(uid_t, uid_t);
50 extern void check(int);
55 setuid(2); // expected-warning{{The return value from the call to 'setuid' is not checked. If an error occurs in 'setuid', the following code may execute with unexpected privileges}}
56 setuid(0); // expected-warning{{The return value from the call to 'setuid' is not checked. If an error occurs in 'setuid', the following code may execute with unexpected privileges}}
60 // Currently the 'setuid' check is not flow-sensitive, and only looks
61 // at whether the function was called in a compound statement. This
62 // will lead to false negatives, but there should be no false positives.
63 int t = setuid(2); // no-warning
64 (void)setuid (2); // no-warning
66 check(setuid (2)); // no-warning
68 setreuid(2,2); // expected-warning{{The return value from the call to 'setreuid' is not checked. If an error occurs in 'setreuid', the following code may execute with unexpected privileges}}
69 setregid(2,2); // expected-warning{{The return value from the call to 'setregid' is not checked. If an error occurs in 'setregid', the following code may execute with unexpected privileges}}
72 // <rdar://problem/6337100> CWE-338: Use of cryptographically weak prng
75 double erand48(unsigned short[3]);
76 long jrand48(unsigned short[3]);
77 void lcong48(unsigned short[7]);
80 long nrand48(unsigned short[3]);
82 int rand_r(unsigned *);
89 rand(); // expected-warning{{Function 'rand' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
90 drand48(); // expected-warning{{Function 'drand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
91 erand48(a); // expected-warning{{Function 'erand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
92 jrand48(a); // expected-warning{{Function 'jrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
93 lcong48(a); // expected-warning{{Function 'lcong48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
94 lrand48(); // expected-warning{{Function 'lrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
95 mrand48(); // expected-warning{{Function 'mrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
96 nrand48(a); // expected-warning{{Function 'nrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
97 rand_r(&b); // expected-warning{{Function 'rand_r' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
98 random(); // expected-warning{{The 'random' function produces a sequence of values that an adversary may be able to predict. Use 'arc4random' instead}}
101 char *mktemp(char *buf);
104 char *x = mktemp("/tmp/zxcv"); // expected-warning{{Call to function 'mktemp' is insecure as it always creates or uses insecure temporary file}}