Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/rng-tools5-5/contrib/randstat.c
Examining data/rng-tools5-5/contrib/rngtest.c
Examining data/rng-tools5-5/exits.h
Examining data/rng-tools5-5/fips.c
Examining data/rng-tools5-5/fips.h
Examining data/rng-tools5-5/rngd.h
Examining data/rng-tools5-5/rngd_entsource.c
Examining data/rng-tools5-5/rngd_entsource.h
Examining data/rng-tools5-5/rngd_linux.c
Examining data/rng-tools5-5/rngd_linux.h
Examining data/rng-tools5-5/rngd_rdrand.c
Examining data/rng-tools5-5/rngtest.c
Examining data/rng-tools5-5/stats.c
Examining data/rng-tools5-5/stats.h
Examining data/rng-tools5-5/util.c
Examining data/rng-tools5-5/rngd.c

FINAL RESULTS:

data/rng-tools5-5/rngd.h:80:3:  [4] (format) syslog:
  If syslog's format strings can be influenced by an attacker, they can be
  exploited (CWE-134). Use a constant format string for syslog.
		syslog((priority), fmt, ##args); \
data/rng-tools5-5/rngd.h:82:3:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
		fprintf(stderr, fmt, ##args); \
data/rng-tools5-5/contrib/rngtest.c:15:8:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
  char random;
data/rng-tools5-5/contrib/rngtest.c:16:20:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
  fscanf(dev,"%c",&random);
data/rng-tools5-5/contrib/rngtest.c:17:10:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
  return random;
data/rng-tools5-5/contrib/rngtest.c:144:17:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
  unsigned char random;
data/rng-tools5-5/contrib/randstat.c:17:14:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	random_fd = open("/dev/random", O_RDONLY);
data/rng-tools5-5/contrib/rngtest.c:147:15:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  if(! (dev = fopen(RNG_DEVICE,"r"))) {
data/rng-tools5-5/fips.c:37:7:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
const char *fips_test_names[N_FIPS_TESTS] = {
data/rng-tools5-5/fips.h:53:14:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
extern const char *fips_test_names[N_FIPS_TESTS];
data/rng-tools5-5/rngd.c:231:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char buf[FIPS_RNG_BUFFER_SIZE];
data/rng-tools5-5/rngd_entsource.c:90:20:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	ent_src->rng_fd = open(ent_src->rng_name, O_RDWR);
data/rng-tools5-5/rngd_entsource.c:140:4:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
			memcpy(offset,temp_buf + TPM_GET_RNG_OVERHEAD,
data/rng-tools5-5/rngd_entsource.c:144:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
		memcpy(offset, temp_buf + TPM_GET_RNG_OVERHEAD, r);
data/rng-tools5-5/rngd_entsource.c:163:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char tempbuf[4];
data/rng-tools5-5/rngd_entsource.c:178:20:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	ent_src->rng_fd = open(ent_src->rng_name, O_RDONLY);
data/rng-tools5-5/rngd_entsource.c:194:20:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	ent_src->rng_fd = open(ent_src->rng_name, O_RDWR);
data/rng-tools5-5/rngd_linux.c:61:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char psbuf[64], *p;
data/rng-tools5-5/rngd_linux.c:67:6:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	f = fopen("/proc/sys/kernel/random/poolsize", "r");
data/rng-tools5-5/rngd_linux.c:99:14:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	random_fd = open(randomdev, O_RDWR);
data/rng-tools5-5/rngd_linux.c:106:6:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	f = fopen("/proc/sys/kernel/random/write_wakeup_threshold", "w");
data/rng-tools5-5/rngd_linux.c:126:12:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
		unsigned char data[size];
data/rng-tools5-5/rngd_linux.c:131:2:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
	memcpy(entropy.data, buf, size);
data/rng-tools5-5/rngd_rdrand.c:139:17:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
static unsigned char iv_buf[CHUNK_SIZE] __attribute__((aligned(128)));
data/rng-tools5-5/rngd_rdrand.c:178:18:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	static unsigned char rdrand_buf[CHUNK_SIZE * RDRAND_ROUNDS]
data/rng-tools5-5/rngd_rdrand.c:181:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char rdseed_buf[CHUNK_SIZE]
data/rng-tools5-5/rngd_rdrand.c:236:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
		memcpy(p, data, chunk);
data/rng-tools5-5/rngd_rdrand.c:304:18:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	static unsigned char key[AES_BLOCK] = {
data/rng-tools5-5/rngd_rdrand.c:308:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char xkey[AES_BLOCK];	/* Material to XOR into the key */
data/rng-tools5-5/rngd_rdrand.c:338:7:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	fd = open("/dev/urandom", O_RDONLY);
data/rng-tools5-5/rngtest.c:146:10:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
unsigned char rng_buffer[FIPS_RNG_BUFFER_SIZE];
data/rng-tools5-5/rngtest.c:287:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char buf[256];
data/rng-tools5-5/rngtest.c:327:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char tempbuf[4];
data/rng-tools5-5/stats.c:40:8:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
static char stat_prefix[20] = "";
data/rng-tools5-5/stats.c:135:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char unitscaled[20];
data/rng-tools5-5/util.c:38:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char str[32], *s;
data/rng-tools5-5/util.c:45:2:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
	sprintf(str, "%u\n", (unsigned int) getpid());
data/rng-tools5-5/util.c:48:7:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	fd = open(pid_fn, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
data/rng-tools5-5/rngd_entsource.c:58:8:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
			r = read(ent_src->rng_fd, buf + off, size);
data/rng-tools5-5/rngd_entsource.c:130:7:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
		r = read(ent_src->rng_fd, temp_buf,size);
data/rng-tools5-5/rngd_rdrand.c:340:3:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
		read(fd, key, sizeof key);
data/rng-tools5-5/rngtest.c:217:7:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
		r = read(0, buf + off, size);
data/rng-tools5-5/stats.c:45:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(stat_prefix, prefix, sizeof(stat_prefix)-1);
data/rng-tools5-5/stats.c:68:3:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
		strncpy(unit, baseunit, unitsize);
data/rng-tools5-5/util.c:75:10:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
	bytes = strlen(str);

ANALYSIS SUMMARY:

Hits = 45
Lines analyzed = 2553 in approximately 0.08 seconds (32464 lines/second)
Physical Source Lines of Code (SLOC) = 1647
Hits@level = [0]  47 [1]   7 [2]  32 [3]   4 [4]   2 [5]   0
Hits@level+ = [0+]  92 [1+]  45 [2+]  38 [3+]   6 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 55.8591 [1+] 27.3224 [2+] 23.0723 [3+] 3.64299 [4+] 1.21433 [5+]   0
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.