crackercat/libpe

The PE library used by @merces/pev

libpe

The PE library used by pev - the PE file toolkit purely written in C and available to many platforms.

Features

• Support for both 32 and 64-bits PE files.
• ssdeep support (built-in libfuzzy).
• Disassemble support (built-in libudis86).
• Imphash support.
• Crypographic digests calculation (using OpeenSSL).

How to get the source code

git clone https://github.com/merces/libpe.git

How to build on Linux

cd libpe
make

NOTE: You may need to install OpenSSL using your package manager. Examples:

apt install libssl-dev
yum install openssl-devel

How to build on macOS

cd libpe
CFLAGS="-I/usr/local/opt/openssl/include/" LDFLAGS="-L/usr/local/opt/openssl/lib/" make

NOTE: You may need to install OpenSSL and PCRE via Homebrew:

brew update
brew install openssl

Usage example

#include <stdio.h>
#include "../include/libpe/pe.h"

int main(int argc, char *argv[]) {

    if (argc < 2)
        return 1;

    pe_ctx_t ctx;
    pe_err_e err = pe_load_file(&ctx, argv[1]);

    if (err != LIBPE_E_OK) {
        pe_error_print(stderr, err);
        return 1;
    }

    err = pe_parse(&ctx);
    if (err != LIBPE_E_OK) {
        pe_error_print(stderr, err);
        return 1;
    }

    if (!pe_is_pe(&ctx))
        return 1;

    printf("Entrypoint: %#llx\n", ctx.pe.entrypoint);

    return 0;
}

Compile with:

cc -o example example.c -lpe

Troubleshooting

• Error while loading shared libraries: libpe.so.1

  • The prefix used in libpe's makefile is /usr/local/lib
  • If your system isn't set to look here, you can add it to ld.so.conf
  • Alternatively, change prefix to whatever suits, ie. /usr/lib

• Undefined reference to log

  • Linux' glibc does not define math functions, they live instead in libm
  • Link against both libpe and libm to fix this (ie. -lm)