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-ed25519-1.2.4/ext/ed25519_ref10/sc.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sqrtm1.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge_madd.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/d.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sign.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/base2.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ed25519_ref10.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge_p2_dbl.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge_add.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/api.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/base.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/fe.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sc_reduce.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ed25519_ref10.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/keypair.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/d2.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/fe.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/pow22523.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge_sub.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/verify.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sc_muladd.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sha512.c
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge_msub.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sha512.h
Examining data/ruby-ed25519-1.2.4/ext/ed25519_ref10/pow225521.h

FINAL RESULTS:

data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ed25519_ref10.c:86:5:  [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(sig_and_msg, RSTRING_PTR(signature), SIGNATUREBYTES);
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ed25519_ref10.c:87:5:  [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(sig_and_msg + SIGNATUREBYTES, RSTRING_PTR(msg), RSTRING_LEN(msg));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/fe.c:279:12:  [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 s[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/fe.c:292:23:  [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 const unsigned char zero[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/fe.c:296:12:  [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 s[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:58:10:  [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.
  signed char aslide[256];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:59:10:  [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.
  signed char bslide[256];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c:13:12:  [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 pkcopy[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c:14:12:  [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 rcopy[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c:15:12:  [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 scopy[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c:16:12:  [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 h[64];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/open.c:17:12:  [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 rcheck[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sign.c:13:12:  [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 pk[32];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sign.c:14:12:  [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 az[64];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sign.c:15:12:  [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 nonce[64];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/sign.c:16:12:  [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 hram[64];
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:283:16:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
static uint8_t equal(int8_t b,int8_t c)
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:320:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][0],equal(babs,1));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:321:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][1],equal(babs,2));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:322:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][2],equal(babs,3));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:323:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][3],equal(babs,4));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:324:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][4],equal(babs,5));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:325:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][5],equal(babs,6));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:326:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][6],equal(babs,7));
data/ruby-ed25519-1.2.4/ext/ed25519_ref10/ge.c:327:24:  [1] (buffer) equal:
  Function does not check the second iterator for over-read conditions
  (CWE-126). This function is often discouraged by most C++ coding standards
  in favor of its safer alternatives provided since C++14. Consider using a
  form of this function that checks the second iterator before potentially
  overflowing it.
  cmov(t,&base[pos][7],equal(babs,8));

ANALYSIS SUMMARY:

Hits = 25
Lines analyzed = 5046 in approximately 0.21 seconds (24356 lines/second)
Physical Source Lines of Code (SLOC) = 3789
Hits@level = [0]   0 [1]   9 [2]  16 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  25 [1+]  25 [2+]  16 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 6.59805 [1+] 6.59805 [2+] 4.22275 [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.