SQL / SQLI tokenizer parser analyzer
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client9 Merge pull request #133 from p0pr0ck5/lua-ffi-link
Link to LuaJIT FFI bindings
Latest commit e86ff40 Mar 12, 2018


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SQL / SQLI tokenizer parser analyzer. For

See https://www.client9.com/ for details and presentations.

Simple example:

#include <stdio.h>
#include <strings.h>
#include <errno.h>
#include "libinjection.h"
#include "libinjection_sqli.h"

int main(int argc, const char* argv[])
    struct libinjection_sqli_state state;
    int issqli;

    const char* input = argv[1];
    size_t slen = strlen(input);

    /* in real-world, you would url-decode the input, etc */

    libinjection_sqli_init(&state, input, slen, FLAG_NONE);
    issqli = libinjection_is_sqli(&state);
    if (issqli) {
        fprintf(stderr, "sqli detected with fingerprint of '%s'\n", state.fingerprint);
    return issqli;
$ gcc -Wall -Wextra examples.c libinjection_sqli.c
$ ./a.out "-1' and 1=1 union/* foo */select load_file('/etc/passwd')--"
sqli detected with fingerprint of 's&1UE'

More advanced samples:


See CHANGELOG for details.

Versions are listed as "major.minor.point"

Major are significant changes to the API and/or fingerprint format. Applications will need recompiling and/or refactoring.

Minor are C code changes. These may include

  • logical change to detect or suppress
  • optimization changes
  • code refactoring

Point releases are purely data changes. These may be safely applied.


The continuous integration results at https://travis-ci.org/client9/libinjection tests the following:


Copyright (c) 2012-2016 Nick Galbreath

Licensed under the standard BSD 3-Clause open source license. See COPYING for details.


The src directory contains everything, but you only need to copy the following into your source tree: