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/libopkele-2.0.4+git20140305.9651b55/include/opkele/association.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/ax.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/basic_op.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/basic_rp.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/curl.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/data.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/debug.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/discovery.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/exception.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/expat.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/extension.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/extension_chain.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/iterator.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/oauth_ext.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/opkele-config.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/prequeue_rp.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/sreg.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/tidy.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/types.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/uris.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/util-internal.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/util.h
Examining data/libopkele-2.0.4+git20140305.9651b55/include/opkele/verify_op.h
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/ax.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/curl.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/data.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/discovery.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/exception.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/expat.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/extension.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/extension_chain.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/fields.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/message.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/oauth_ext.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/params.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/prequeue_rp.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/secret.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/sreg.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/verify_op.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/basic_op.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/lib/basic_rp.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/test/OP.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/test/RP.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/test/idiscover.cc
Examining data/libopkele-2.0.4+git20140305.9651b55/test/kingate_openid_message.h
Examining data/libopkele-2.0.4+git20140305.9651b55/test/sqlite.h
Examining data/libopkele-2.0.4+git20140305.9651b55/test/test.cc

FINAL RESULTS:

data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:127:17:  [3] (buffer) getenv:
  Environment variables are untrustable input if they can be set by an
  attacker. They can have any content and length, and the same variable can
  be set more than once (CWE-807, CWE-20). Check environment variables
  carefully before using them.
	    char *tz = getenv("TZ");
data/libopkele-2.0.4+git20140305.9651b55/lib/basic_op.cc:70:11:  [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 key_digest[SHA256_DIGEST_LENGTH];
data/libopkele-2.0.4+git20140305.9651b55/lib/basic_op.cc:213:2:  [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 w3timestr[24];
data/libopkele-2.0.4+git20140305.9651b55/lib/basic_rp.cc:51:11:  [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 key_digest[SHA256_DIGEST_LENGTH];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:70:12:  [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 tmp[512];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:119:6:  [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 rv[25];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:195:4:  [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 tmp[4];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:213:6:  [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 tmp[3]; tmp[2] = 0;
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:257:6:  [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 rv[32];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:330:8:  [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.
		     char tmp[8];
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:344:7:  [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.
	     char tmp[3] = { 0,0,0 };
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:494:15:  [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 md[SHA256_DIGEST_LENGTH];
data/libopkele-2.0.4+git20140305.9651b55/test/test.cc:84:2:  [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 tmp[512]; snprintf(tmp,sizeof(tmp)-1,
data/libopkele-2.0.4+git20140305.9651b55/lib/discovery.cc:47:11:  [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).
	int nl = strlen(n), enl = strlen(en);
data/libopkele-2.0.4+git20140305.9651b55/lib/discovery.cc:47:28:  [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).
	int nl = strlen(n), enl = strlen(en);
data/libopkele-2.0.4+git20140305.9651b55/lib/util.cc:446:41:  [1] (buffer) mismatch:
  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.
	    pair<const char*,const char*> mp = mismatch(

ANALYSIS SUMMARY:

Hits = 16
Lines analyzed = 6778 in approximately 0.31 seconds (21519 lines/second)
Physical Source Lines of Code (SLOC) = 4955
Hits@level = [0]   8 [1]   3 [2]  12 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  24 [1+]  16 [2+]  13 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 4.84359 [1+] 3.22906 [2+] 2.62361 [3+] 0.201816 [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.