mirror of
https://github.com/nmap/nmap.git
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203 lines
10 KiB
C++
203 lines
10 KiB
C++
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/***************************************************************************
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* fingerdiff.c -- A relatively simple utility for determining the *
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* differences between a "reference" fingerprint (which can have *
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* expressions as attributes) and an observed fingerprint (no *
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* expressions). *
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* *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2006 Insecure.Com LLC. Nmap is *
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* also a registered trademark of Insecure.Com LLC. This program is free *
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* software; you may redistribute and/or modify it under the terms of the *
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* GNU General Public License as published by the Free Software *
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* Foundation; Version 2 with the clarifications and exceptions described *
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* below. This guarantees your right to use, modify, and redistribute *
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* this software under certain conditions. If you wish to embed Nmap *
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* technology into proprietary software, we sell alternative licenses *
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* (contact sales@insecure.com). Dozens of software vendors already *
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* license Nmap technology such as host discovery, port scanning, OS *
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* detection, and version detection. *
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* *
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* Note that the GPL places important restrictions on "derived works", yet *
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* it does not provide a detailed definition of that term. To avoid *
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* misunderstandings, we consider an application to constitute a *
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* "derivative work" for the purpose of this license if it does any of the *
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* following: *
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* o Integrates source code from Nmap *
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* o Reads or includes Nmap copyrighted data files, such as *
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* nmap-os-fingerprints or nmap-service-probes. *
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* o Executes Nmap and parses the results (as opposed to typical shell or *
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* execution-menu apps, which simply display raw Nmap output and so are *
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* not derivative works.) *
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* o Integrates/includes/aggregates Nmap into a proprietary executable *
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* installer, such as those produced by InstallShield. *
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* o Links to a library or executes a program that does any of the above *
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* *
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* The term "Nmap" should be taken to also include any portions or derived *
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* works of Nmap. This list is not exclusive, but is just meant to *
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* clarify our interpretation of derived works with some common examples. *
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* These restrictions only apply when you actually redistribute Nmap. For *
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* example, nothing stops you from writing and selling a proprietary *
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* front-end to Nmap. Just distribute it by itself, and point people to *
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* http://insecure.org/nmap/ to download Nmap. *
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* *
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* We don't consider these to be added restrictions on top of the GPL, but *
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* just a clarification of how we interpret "derived works" as it applies *
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* to our GPL-licensed Nmap product. This is similar to the way Linus *
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* Torvalds has announced his interpretation of how "derived works" *
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* applies to Linux kernel modules. Our interpretation refers only to *
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* Nmap - we don't speak for any other GPL products. *
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* *
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* If you have any questions about the GPL licensing restrictions on using *
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* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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* we also offer alternative license to integrate Nmap into proprietary *
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* applications and appliances. These contracts have been sold to dozens *
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* of software vendors, and generally include a perpetual license as well *
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* as providing for priority support and updates as well as helping to *
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* fund the continued development of Nmap technology. Please email *
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* sales@insecure.com for further information. *
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* *
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* As a special exception to the GPL terms, Insecure.Com LLC grants *
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* permission to link the code of this program with any version of the *
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* OpenSSL library which is distributed under a license identical to that *
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* listed in the included Copying.OpenSSL file, and distribute linked *
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* combinations including the two. You must obey the GNU GPL in all *
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* respects for all of the code used other than OpenSSL. If you modify *
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* this file, you may extend this exception to your version of the file, *
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* but you are not obligated to do so. *
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* *
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* If you received these files with a written license agreement or *
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* contract stating terms other than the terms above, then that *
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* alternative license agreement takes precedence over these comments. *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes (none *
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* have been found so far). *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to send your changes *
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* to fyodor@insecure.org for possible incorporation into the main *
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* distribution. By sending these changes to Fyodor or one the *
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* Insecure.Org development mailing lists, it is assumed that you are *
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* offering Fyodor and Insecure.Com LLC the unlimited, non-exclusive right *
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* to reuse, modify, and relicense the code. Nmap will always be *
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* available Open Source, but this is important because the inability to *
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* relicense code has caused devastating problems for other Free Software *
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* projects (such as KDE and NASM). We also occasionally relicense the *
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* code to third parties as discussed above. If you wish to specify *
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* special license conditions of your contributions, just say so when you *
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* send them. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details at *
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* http://www.gnu.org/copyleft/gpl.html , or in the COPYING file included *
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* with Nmap. *
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* *
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***************************************************************************/
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/* $Id$ */
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#include "nbase.h"
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#include "nmap.h"
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#include "osscan.h"
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#include "fingerlib.h"
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void usage(char *err_fmt, ...) {
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va_list ap;
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if (err_fmt) {
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va_start(ap, err_fmt);
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fflush(stdout);
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vfprintf(stderr, err_fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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}
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printf("\nUsage: Use fingerdiff w/o any arguments to read the reference\n"
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" FP front stdin, or give filename:lineno to read it from\n"
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" nmap-os-fingerprints.\n\n");
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exit(1);
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}
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int main(int argc, char *argv[]) {
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FingerPrint *referenceFP;
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FingerPrint *observedFP;
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double accuracy;
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char sourcefile[MAXPATHLEN];
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int sourceline=-1;
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char referenceFPString[8192];
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char observedFPString[8192];
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char line[512];
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char *p, *endptr;
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int i, rc;
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int done=0;
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FILE *fp;
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if (argc < 1 || argc > 2)
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usage(NULL);
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referenceFPString[0] = observedFPString[0] = '\0';
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if (argc == 2) {
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Strncpy(sourcefile, argv[1], sizeof(sourcefile));
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p = strchr(sourcefile, ':');
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if (!p) usage("Filename must be followed by a colon and then line number");
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*p++ = '\0';
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if (!*p) usage(NULL);
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sourceline = strtol(p, &endptr, 10);
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if (*endptr) {
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error("could not parse line number (trailing garbage?)");
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}
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fp = fopen(sourcefile, "r");
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done = 0; i = 1;
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while(i < sourceline) {
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if (fgets(line, sizeof(line), fp) == NULL)
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usage("Failed to read to line %d of %s", sourceline, sourcefile);
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i++;
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}
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if (readFP(fp, referenceFPString, sizeof(referenceFPString)) == -1)
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usage("Failed to read in supposed fingerprint in %s line %d\n", sourcefile, sourceline);
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fclose(fp);
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printf("STEP ONE: Reading REFERENCE FINGERPRINT from %s line %d:\n%s\n"
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,sourcefile, sourceline, referenceFPString);
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} else {
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printf("STEP ONE: Enter the **REFERENCE FINGERPRINT**, followed by a blank or single-dot line:\n");
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if (readFP(stdin, referenceFPString, sizeof(referenceFPString)) == -1)
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usage("Failed to read in supposed fingerprint from stdin\n");
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}
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referenceFP = parse_single_fingerprint(referenceFPString);
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if (!referenceFP) fatal("Sorry -- failed to parse the so-called reference fingerprint you entered");
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printf("STEP TWO: Enter the **OBSERVED FINGERPRINT**, followed by a blank or single-dot line:\n");
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if (readFP(stdin, observedFPString, sizeof(observedFPString)) == -1)
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usage("Failed to read in supposed observed fingerprint from stdin\n");
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observedFP = parse_single_fingerprint(observedFPString);
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if (!observedFP) fatal("Sorry -- failed to parse the so-called reference fingerprint you entered");
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if ((rc = remove_duplicate_tests(observedFP))) {
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printf("[WARN] Adjusted fingerprint due to %d duplicated tests (we only look at the first).\n", rc);
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}
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/* OK, now I've got the fingerprints -- I just need to compare them ... */
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accuracy = compare_fingerprints(referenceFP, observedFP, 1);
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if (accuracy == 1)
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printf("PERFECT MATCH!\n");
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else printf("Accuracy of the two prints is %d%% -- see differences above.\n",
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(int) (accuracy * 100));
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return 0;
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}
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