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/ruby-bcrypt-pbkdf-1.0.1/ext/mri/crypto_api.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/blowfish.c
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/explicit_bzero.c
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/utils.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/util.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/includes.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/sha2.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/blf.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/bcrypt_pbkdf_ext.c
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/crypto_hash_sha512.h
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/bcrypt_pbkdf.c
Examining data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c

FINAL RESULTS:

data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/crypto_hash_sha512.h:6:14:  [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 buf[128];
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:111:50:  [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.
SHA512_Transform(uint64_t *state, const unsigned char block[128])
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:123:5:  [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(S, state, 64);
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:216:17:  [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 PAD[128] = {
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:230:14:  [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 len[16];
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:253:5:  [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(state->state, sha512_initstate, sizeof sha512_initstate);
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:280:9:  [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(&state->buf[r], src, inlen);
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:283:5:  [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(&state->buf[r], src, 128 - r);
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/hash_sha512.c:293:5:  [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(state->buf, src, inlen); /* inlen < 128 */
data/ruby-bcrypt-pbkdf-1.0.1/ext/mri/blowfish.c:691:33:  [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).
	blf_key(&c, (u_int8_t *) key2, strlen(key2));

ANALYSIS SUMMARY:

Hits = 10
Lines analyzed = 1401 in approximately 0.06 seconds (21690 lines/second)
Physical Source Lines of Code (SLOC) = 1062
Hits@level = [0]   3 [1]   1 [2]   9 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  13 [1+]  10 [2+]   9 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 12.2411 [1+] 9.4162 [2+] 8.47458 [3+]   0 [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.