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/otp-1.2.2/md5.c
Examining data/otp-1.2.2/md5.h
Examining data/otp-1.2.2/otp.c
Examining data/otp-1.2.2/random.c

FINAL RESULTS:

data/otp-1.2.2/otp.c:472:9:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
        sprintf(v + strlen(v), "%*d) %s  ", ndig, line, password);
data/otp-1.2.2/md5.c:74:6:  [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, buf, len);
data/otp-1.2.2/md5.c:77:2:  [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(p, buf, (int) t);
data/otp-1.2.2/md5.c:86:2:  [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(ctx->in, buf, 64);
data/otp-1.2.2/md5.c:95:5:  [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(ctx->in, buf, len);
data/otp-1.2.2/md5.c:102:24:  [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.
void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
data/otp-1.2.2/md5.c:139:5:  [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(digest, ctx->buf, 16);
data/otp-1.2.2/md5.h:9:11:  [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 in[64];
data/otp-1.2.2/md5.h:14:31:  [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 void MD5Final(unsigned char digest[16], struct MD5Context *ctx);
data/otp-1.2.2/otp.c:131:9:  [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.
typedef char randvec[RandVecL];
data/otp-1.2.2/otp.c:188:14:  [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 digest[16];
data/otp-1.2.2/otp.c:210:22:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
scanl:		    if ((j = atoi(op + 1)) > 0) {
data/otp-1.2.2/otp.c:229:36:  [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 ((sigfile = fopen(op + 1, "w")) == NULL) {
data/otp-1.2.2/otp.c:236:15:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
		    npass = atoi(op + 1);
data/otp-1.2.2/otp.c:247:13:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
		    sep = atoi(op + 1);
data/otp-1.2.2/otp.c:256:17:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
		    linelen = atoi(op + 1);
data/otp-1.2.2/otp.c:265:21:  [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).
            ofile = fopen(op, "w");
data/otp-1.2.2/otp.c:358:12:  [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 ((rf = fopen("/dev/random", "r")) != NULL) {
data/otp-1.2.2/otp.c:402:2:  [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 rt[1024];
data/otp-1.2.2/otp.c:403:20:  [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).
        FILE *fo = fopen("rtest.bin",
data/otp-1.2.2/otp.c:303:43:  [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).
	MD5Update(&md5c, (unsigned char *) seed, strlen(seed));
data/otp-1.2.2/otp.c:472:21:  [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).
        sprintf(v + strlen(v), "%*d) %s  ", ndig, line, password);
data/otp-1.2.2/otp.c:486:51:  [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).
	    MD5Update(&md5c, (unsigned char *) password, strlen(password));
data/otp-1.2.2/otp.c:494:9:  [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).
    if (strlen(v) > 0) {

ANALYSIS SUMMARY:

Hits = 24
Lines analyzed = 1138 in approximately 0.06 seconds (19487 lines/second)
Physical Source Lines of Code (SLOC) = 704
Hits@level = [0]  36 [1]   4 [2]  19 [3]   0 [4]   1 [5]   0
Hits@level+ = [0+]  60 [1+]  24 [2+]  20 [3+]   1 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 85.2273 [1+] 34.0909 [2+] 28.4091 [3+] 1.42045 [4+] 1.42045 [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.