Crate nsis 

Parse and inspect NSIS installer binaries.

This crate provides typed access to all internal structures within an NSIS (NullSoft Scriptable Install System) installer executable, from the PE overlay through decompressed headers down to individual script instructions and embedded files.

Quick Start

use nsis::NsisInstaller;

let file_bytes = std::fs::read("installer.exe").unwrap();
let installer = NsisInstaller::from_bytes(&file_bytes).unwrap();

println!("Version: {:?}", installer.version());
for section in installer.sections() {
    let section = section.unwrap();
    println!("  Section: code_size={}", section.code_size());
}

Architecture

The crate is organized in layers:

• PE overlay detection (addressmap::PeOverlay): Locates the NSIS data appended after the PE sections.
• Decompression (decompress): Handles zlib, bzip2, and LZMA decompression of the header block.
• Low-level structures (header, nsis, strings, opcode): View types for each structure in the NSIS format.
• High-level API (NsisInstaller): Ties everything together into a convenient exploration interface.

Design

Low-level structure types borrow from either the original file byte slice or the decompressed header buffer. Accessor methods read directly from the underlying buffer using little-endian byte decoding. The only heap allocations are for decompressed data and decoded strings.

Re-exports

pub use error::Error;

pub use installer::BasicBlock;

pub use installer::BranchCondition;

pub use installer::Callback;

pub use installer::ControlFlowEdge;

pub use installer::ControlFlowTarget;

pub use installer::EdgeKind;

pub use installer::ExecCommand;

pub use installer::ExecIter;

pub use installer::ExecOp;

pub use installer::ExtractedFile;

pub use installer::FileIter;

pub use installer::NsisInstaller;

pub use installer::PageHandler;

pub use installer::PluginCall;

pub use installer::PluginCallIter;

pub use installer::RegDelete;

pub use installer::RegRead;

pub use installer::RegValueType;

pub use installer::RegWrite;

pub use installer::RegistryIter;

pub use installer::RegistryOp;

pub use installer::ScriptAnalysis;

pub use installer::ScriptAnalysisDiagnostic;

pub use installer::ScriptFunction;

pub use installer::ScriptRoot;

pub use installer::ScriptRootKind;

pub use installer::ShellExecOp;

pub use installer::Shortcut;

pub use installer::ShortcutIter;

pub use installer::Uninstaller;

pub use installer::UninstallerIter;

pub use opcode::EW_ABORT;

pub use opcode::EW_ASSIGNVAR;

pub use opcode::EW_BRINGTOFRONT;

pub use opcode::EW_CALL;

pub use opcode::EW_CHDETAILSVIEW;

pub use opcode::EW_COPYFILES;

pub use opcode::EW_CREATEDIR;

pub use opcode::EW_CREATESHORTCUT;

pub use opcode::EW_DELETEFILE;

pub use opcode::EW_DELREG;

pub use opcode::EW_EXECUTE;

pub use opcode::EW_EXTRACTFILE;

pub use opcode::EW_FCLOSE;

pub use opcode::EW_FGETS;

pub use opcode::EW_FGETWS;

pub use opcode::EW_FINDCLOSE;

pub use opcode::EW_FINDFIRST;

pub use opcode::EW_FINDNEXT;

pub use opcode::EW_FINDWINDOW;

pub use opcode::EW_FOPEN;

pub use opcode::EW_FPUTS;

pub use opcode::EW_FPUTWS;

pub use opcode::EW_FSEEK;

pub use opcode::EW_GETDLGITEM;

pub use opcode::EW_GETDLLVERSION;

pub use opcode::EW_GETFILETIME;

pub use opcode::EW_GETFLAG;

pub use opcode::EW_GETFULLPATHNAME;

pub use opcode::EW_GETOSINFO;

pub use opcode::EW_GETTEMPFILENAME;

pub use opcode::EW_IFFILEEXISTS;

pub use opcode::EW_IFFLAG;

pub use opcode::EW_INSTTYPESET;

pub use opcode::EW_INTCMP;

pub use opcode::EW_INTFMT;

pub use opcode::EW_INTOP;

pub use opcode::EW_INVALID_OPCODE;

pub use opcode::EW_ISWINDOW;

pub use opcode::EW_LOADANDSETIMAGE;

pub use opcode::EW_LOCKWINDOW;

pub use opcode::EW_LOG;

pub use opcode::EW_MESSAGEBOX;

pub use opcode::EW_NOP;

pub use opcode::EW_PUSHPOP;

pub use opcode::EW_QUIT;

pub use opcode::EW_READENVSTR;

pub use opcode::EW_READINISTR;

pub use opcode::EW_READREGSTR;

pub use opcode::EW_REBOOT;

pub use opcode::EW_REGENUM;

pub use opcode::EW_REGISTERDLL;

pub use opcode::EW_RENAME;

pub use opcode::EW_RESERVEDOPCODE;

pub use opcode::EW_RET;

pub use opcode::EW_RMDIR;

pub use opcode::EW_SEARCHPATH;

pub use opcode::EW_SECTIONSET;

pub use opcode::EW_SENDMESSAGE;

pub use opcode::EW_SETCTLCOLORS;

pub use opcode::EW_SETFILEATTRIBUTES;

pub use opcode::EW_SETFLAG;

pub use opcode::EW_SHELLEXEC;

pub use opcode::EW_SHOWWINDOW;

pub use opcode::EW_SLEEP;

pub use opcode::EW_STRCMP;

pub use opcode::EW_STRLEN;

pub use opcode::EW_UPDATETEXT;

pub use opcode::EW_WRITEINI;

pub use opcode::EW_WRITEREG;

pub use opcode::EW_WRITEUNINSTALLER;

Modules

addressmap

PE overlay detection for NSIS installers.

decompress

Decompression support for NSIS installer data.

error

Error types for NSIS installer parsing.

header

NSIS header structures.

installer

High-level NSIS installer API.

nsis

NSIS data structure view types.

opcode

NSIS opcode definitions and version-aware resolution.

strings

NSIS string table parsing.