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/libbase58-0.1.4/base58.c Examining data/libbase58-0.1.4/clitool.c Examining data/libbase58-0.1.4/libbase58.h FINAL RESULTS: data/libbase58-0.1.4/clitool.c:41:17: [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, "cd:h")) != -1) data/libbase58-0.1.4/base58.c:124:11: [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 buf[32]; data/libbase58-0.1.4/base58.c:193:2: [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(&buf[1], data, datasz); data/libbase58-0.1.4/clitool.c:51:13: [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). int i = atoi(optarg); data/libbase58-0.1.4/clitool.c:108:5: [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(&cbin[zeros], bin, decode); data/libbase58-0.1.4/clitool.c:111:5: [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(cbin, &bin[decode - ssz], ssz); data/libbase58-0.1.4/clitool.c:120:3: [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 s[ssz]; data/libbase58-0.1.4/base58.c:50:11: [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). b58sz = strlen(b58); data/libbase58-0.1.4/clitool.c:83:8: [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). rt = strlen(argv[optind]); ANALYSIS SUMMARY: Hits = 9 Lines analyzed = 354 in approximately 0.07 seconds (5265 lines/second) Physical Source Lines of Code (SLOC) = 288 Hits@level = [0] 4 [1] 2 [2] 6 [3] 1 [4] 0 [5] 0 Hits@level+ = [0+] 13 [1+] 9 [2+] 7 [3+] 1 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 45.1389 [1+] 31.25 [2+] 24.3056 [3+] 3.47222 [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.