56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
extern crate binnpatch;
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extern crate data_encoding;
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extern crate memmap;
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extern crate binnpatch_macro;
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use memmap::{Mmap, MmapMut};
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use std::fs;
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use std::fs::{File, OpenOptions};
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use std::ops::{Deref, DerefMut};
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use binnpatch::{ApplyPatch, BytesPattern, FindPattern};
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use binnpatch_macro::{binnpats, binnvecs};
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fn main() {
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let src_file = "Some.dll";
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let dst_file = "Some.dll.patched";
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let pattern =
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binnpats!("40 3E 1D ?? ?? 12 1C 7C 48 ?? 73 6F 02 22 ?? 61 19 4E 13 60 48 45 19 27 5B");
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let replacement =
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binnvecs!("06 5A 18 74 2D 62 12 6A 13 4A 2B 0E 6F 0F 36 7A 28 0A 37 67 0A 4B 01 73 14");
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let file = File::open(src_file).expect("src open");
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let src_map = unsafe { Mmap::map(&file) }.expect("src map");
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let data_src = src_map.deref();
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let offset = data_src.find_pattern_first(&pattern);
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if 0 == offset {
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panic!("src pattern not found");
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}
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println!("found at {:#010X}", offset);
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if replacement.len() > data_src.len() - offset {
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panic!("replace overflow");
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}
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drop(src_map);
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drop(file);
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fs::copy(src_file, dst_file).expect("file copy");
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let file = OpenOptions::new()
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.read(true)
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.write(true)
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.open(dst_file)
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.expect("dst open");
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let mut dst_map = unsafe { MmapMut::map_mut(&file) }.expect("dst map");
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let mut data_dst = dst_map.deref_mut();
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data_dst.apply_patch(offset, &replacement);
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drop(dst_map);
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println!("done");
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}
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