forked from OSchip/llvm-project
106 lines
5.5 KiB
Objective-C
106 lines
5.5 KiB
Objective-C
// RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-check-security-syntactic %s -verify
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// <rdar://problem/6336718> rule request: floating point used as loop
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// condition (FLP30-C, FLP-30-CPP)
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//
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// For reference: https://www.securecoding.cert.org/confluence/display/seccode/FLP30-C.+Do+not+use+floating+point+variables+as+loop+counters
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//
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void test_float_condition() {
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for (float x = 0.1f; x <= 1.0f; x += 0.1f) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
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for (float x = 100000001.0f; x <= 100000010.0f; x += 1.0f) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
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for (float x = 100000001.0f; x <= 100000010.0f; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'float'}}
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for (double x = 100000001.0; x <= 100000010.0; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
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for (double x = 100000001.0; ((x)) <= 100000010.0; ((x))++ ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
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for (double x = 100000001.0; 100000010.0 >= x; x = x + 1.0 ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
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int i = 0;
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for (double x = 100000001.0; ((x)) <= 100000010.0; ((x))++, ++i ) {} // expected-warning{{Variable 'x' with floating point type 'double'}}
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typedef float FooType;
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for (FooType x = 100000001.0f; x <= 100000010.0f; x++ ) {} // expected-warning{{Variable 'x' with floating point type 'FooType'}}
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}
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// <rdar://problem/6335715> rule request: gets() buffer overflow
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// Part of recommendation: 300-BSI (buildsecurityin.us-cert.gov)
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char* gets(char *buf);
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void test_gets() {
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char buff[1024];
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gets(buff); // expected-warning{{Call to function 'gets' is extremely insecure as it can always result in a buffer overflow}}
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}
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int getpw(unsigned int uid, char *buf);
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void test_getpw() {
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char buff[1024];
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getpw(2, buff); // expected-warning{{The getpw() function is dangerous as it may overflow the provided buffer. It is obsoleted by getpwuid().}}
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}
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// <rdar://problem/6337132> CWE-273: Failure to Check Whether Privileges Were
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// Dropped Successfully
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typedef unsigned int __uint32_t;
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typedef __uint32_t __darwin_uid_t;
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typedef __uint32_t __darwin_gid_t;
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typedef __darwin_uid_t uid_t;
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typedef __darwin_gid_t gid_t;
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int setuid(uid_t);
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int setregid(gid_t, gid_t);
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int setreuid(uid_t, uid_t);
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extern void check(int);
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void abort(void);
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void test_setuid()
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{
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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}}
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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}}
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if (setuid (2) != 0)
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abort();
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// Currently the 'setuid' check is not flow-sensitive, and only looks
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// at whether the function was called in a compound statement. This
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// will lead to false negatives, but there should be no false positives.
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int t = setuid(2); // no-warning
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(void)setuid (2); // no-warning
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check(setuid (2)); // no-warning
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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}}
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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}}
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}
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// <rdar://problem/6337100> CWE-338: Use of cryptographically weak prng
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int rand(void);
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double drand48(void);
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double erand48(unsigned short[3]);
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long jrand48(unsigned short[3]);
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void lcong48(unsigned short[7]);
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long lrand48(void);
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long mrand48(void);
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long nrand48(unsigned short[3]);
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long random(void);
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int rand_r(unsigned *);
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void test_rand()
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{
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unsigned short a[7];
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unsigned b;
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rand(); // expected-warning{{Function 'rand' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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drand48(); // expected-warning{{Function 'drand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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erand48(a); // expected-warning{{Function 'erand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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jrand48(a); // expected-warning{{Function 'jrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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lcong48(a); // expected-warning{{Function 'lcong48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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lrand48(); // expected-warning{{Function 'lrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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mrand48(); // expected-warning{{Function 'mrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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nrand48(a); // expected-warning{{Function 'nrand48' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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rand_r(&b); // expected-warning{{Function 'rand_r' is obsolete because it implements a poor random number generator. Use 'arc4random' instead}}
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random(); // expected-warning{{The 'random' function produces a sequence of values that an adversary may be able to predict. Use 'arc4random' instead}}
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}
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char *mktemp(char *buf);
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void test_mktemp() {
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char *x = mktemp("/tmp/zxcv"); // expected-warning{{Call to function 'mktemp' is insecure as it always creates or uses insecure temporary file}}
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}
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