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/libpuzzle-0.11/php/libpuzzle/libpuzzle.c
Examining data/libpuzzle-0.11/php/libpuzzle/php_libpuzzle.h
Examining data/libpuzzle-0.11/src/compress.c
Examining data/libpuzzle-0.11/src/cvec.c
Examining data/libpuzzle-0.11/src/dvec.c
Examining data/libpuzzle-0.11/src/globals.h
Examining data/libpuzzle-0.11/src/puzzle-diff.c
Examining data/libpuzzle-0.11/src/puzzle.c
Examining data/libpuzzle-0.11/src/puzzle.h
Examining data/libpuzzle-0.11/src/puzzle_common.h
Examining data/libpuzzle-0.11/src/puzzle_p.h
Examining data/libpuzzle-0.11/src/regress_1.c
Examining data/libpuzzle-0.11/src/regress_2.c
Examining data/libpuzzle-0.11/src/regress_3.c
Examining data/libpuzzle-0.11/src/tunables.c
Examining data/libpuzzle-0.11/src/vector_ops.c

FINAL RESULTS:

data/libpuzzle-0.11/src/puzzle-diff.c:44:19:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
    while ((opt = getopt(argc, argv, "b:cC:eE:hH:l:n:p:tW:")) != -1) {
data/libpuzzle-0.11/src/dvec.c:60:14:  [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.
    unsigned char header[MAX_SIGNATURE_LENGTH];
data/libpuzzle-0.11/src/dvec.c:530:15:  [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 ((fp = fopen(file, "rb")) == NULL) {

ANALYSIS SUMMARY:

Hits = 3
Lines analyzed = 2077 in approximately 0.09 seconds (22889 lines/second)
Physical Source Lines of Code (SLOC) = 1811
Hits@level = [0]  19 [1]   0 [2]   2 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  22 [1+]   3 [2+]   3 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 12.148 [1+] 1.65654 [2+] 1.65654 [3+] 0.552181 [4+]   0 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
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.