nullsec-binarydiff/binarydiff.swift at main · bad-antics/nullsec-binarydiff · GitHub

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// NullSec BinaryDiff - Binary Comparison Tool

// Swift security tool demonstrating:

// - Protocol-oriented programming

// - Value types and copy-on-write

// - Optionals and nil coalescing

// - Strong type system

// - Extensions

// - Enums with associated values

// Author: bad-antics

// License: MIT

import Foundation

let VERSION = "1.0.0"

// ANSI Colors

enum Color: String {

case red = "\u{1B}[31m"

case green = "\u{1B}[32m"

case yellow = "\u{1B}[33m"

case cyan = "\u{1B}[36m"

case gray = "\u{1B}[90m"

case reset = "\u{1B}[0m"

}

// Severity levels

enum Severity: String, CaseIterable {

case critical = "CRITICAL"

case high = "HIGH"

case medium = "MEDIUM"

case low = "LOW"

case info = "INFO"

var color: Color {

switch self {

case .critical, .high: return .red

case .medium: return .yellow

case .low: return .cyan

case .info: return .gray

}

// Diff type

enum DiffType: String {

case added = "ADDED"

case removed = "REMOVED"

case modified = "MODIFIED"

case unchanged = "UNCHANGED"

}

// Binary section

struct Section {

let name: String

let offset: UInt64

let size: UInt64

let permissions: String

let hash: String

}

// Function entry

struct FunctionEntry {

let name: String

let offset: UInt64

let size: UInt64

let complexity: Int

let hash: String

}

// Diff result for sections

struct SectionDiff {

let diffType: DiffType

let oldSection: Section?

let newSection: Section?

let severity: Severity

let reason: String

}

// Diff result for functions

struct FunctionDiff {

let diffType: DiffType

let oldFunc: FunctionEntry?

let newFunc: FunctionEntry?

let severity: Severity

let changes: [String]

}

// Binary info

struct BinaryInfo {

let path: String

let size: UInt64

let hash: String

let sections: [Section]

let functions: [FunctionEntry]

let imports: [String]

let exports: [String]

}

// Analysis result

struct DiffAnalysis {

let oldBinary: BinaryInfo

let newBinary: BinaryInfo

let sectionDiffs: [SectionDiff]

let functionDiffs: [FunctionDiff]

let importDiffs: [String: DiffType]

let exportDiffs: [String: DiffType]

let similarityScore: Double

}

// Security-sensitive function names

let securityFunctions = [

"strcpy", "strcat", "sprintf", "gets",

"memcpy", "memmove", "malloc", "free",

"system", "exec", "popen", "fork",

"connect", "bind", "listen", "accept",

"read", "write", "recv", "send",

"crypt", "encrypt", "decrypt",

"auth", "login", "verify", "validate"

]

// Check if function is security-sensitive

func isSecuritySensitive(_ name: String) -> Bool {

let lower = name.lowercased()

return securityFunctions.contains { lower.contains($0) }

}

// Demo binary info

func demoBinaryOld() -> BinaryInfo {

BinaryInfo(

path: "/usr/bin/app_v1.0",

size: 1048576,

hash: "a1b2c3d4e5f6",

sections: [

Section(name: ".text", offset: 0x1000, size: 0x50000, permissions: "r-x", hash: "text_hash_old"),

Section(name: ".data", offset: 0x60000, size: 0x10000, permissions: "rw-", hash: "data_hash_old"),

Section(name: ".rodata", offset: 0x70000, size: 0x5000, permissions: "r--", hash: "rodata_hash"),

Section(name: ".bss", offset: 0x80000, size: 0x2000, permissions: "rw-", hash: "bss_hash"),

functions: [

FunctionEntry(name: "main", offset: 0x1000, size: 500, complexity: 15, hash: "main_old"),

FunctionEntry(name: "auth_user", offset: 0x2000, size: 200, complexity: 8, hash: "auth_old"),

FunctionEntry(name: "validate_input", offset: 0x3000, size: 150, complexity: 6, hash: "validate_old"),

FunctionEntry(name: "process_data", offset: 0x4000, size: 300, complexity: 12, hash: "process_old"),

FunctionEntry(name: "unsafe_strcpy", offset: 0x5000, size: 50, complexity: 2, hash: "strcpy_hash"),

imports: ["libc.so.6", "libssl.so.1.1", "libcrypto.so.1.1"],

exports: ["app_init", "app_run", "app_cleanup"]

)

}

func demoBinaryNew() -> BinaryInfo {

BinaryInfo(

path: "/usr/bin/app_v2.0",

size: 1148576,

hash: "f6e5d4c3b2a1",

sections: [

Section(name: ".text", offset: 0x1000, size: 0x58000, permissions: "r-x", hash: "text_hash_new"),

Section(name: ".data", offset: 0x60000, size: 0x10000, permissions: "rw-", hash: "data_hash_new"),

Section(name: ".rodata", offset: 0x70000, size: 0x5000, permissions: "r--", hash: "rodata_hash"),

Section(name: ".bss", offset: 0x80000, size: 0x3000, permissions: "rw-", hash: "bss_hash_new"),

Section(name: ".plt", offset: 0x90000, size: 0x1000, permissions: "r-x", hash: "plt_hash"),

functions: [

FunctionEntry(name: "main", offset: 0x1000, size: 600, complexity: 18, hash: "main_new"),

FunctionEntry(name: "auth_user", offset: 0x2000, size: 350, complexity: 12, hash: "auth_new"),

FunctionEntry(name: "validate_input", offset: 0x3000, size: 150, complexity: 6, hash: "validate_old"),

FunctionEntry(name: "process_data", offset: 0x4000, size: 400, complexity: 15, hash: "process_new"),

FunctionEntry(name: "new_feature", offset: 0x6000, size: 250, complexity: 10, hash: "feature_hash"),

imports: ["libc.so.6", "libssl.so.3", "libcrypto.so.3", "libpthread.so.0"],

exports: ["app_init", "app_run", "app_cleanup", "app_configure"]

)

}

// Analyze binary differences

func analyzeDiff(old: BinaryInfo, new: BinaryInfo) -> DiffAnalysis {

var sectionDiffs: [SectionDiff] = []

var functionDiffs: [FunctionDiff] = []

var importDiffs: [String: DiffType] = [:]

var exportDiffs: [String: DiffType] = [:]

// Compare sections

let oldSectionNames = Set(old.sections.map { $0.name })

let newSectionNames = Set(new.sections.map { $0.name })

for section in old.sections {

if let newSection = new.sections.first(where: { $0.name == section.name }) {

if section.hash != newSection.hash {

let severity: Severity = section.name == ".text" ? .high : .medium

sectionDiffs.append(SectionDiff(

diffType: .modified,

oldSection: section,

newSection: newSection,

severity: severity,

reason: "Section content changed"

))

}

} else {

sectionDiffs.append(SectionDiff(

diffType: .removed,

oldSection: section,

newSection: nil,

severity: .medium,

reason: "Section removed"

))

}

for section in new.sections where !oldSectionNames.contains(section.name) {

sectionDiffs.append(SectionDiff(

diffType: .added,

oldSection: nil,

newSection: section,

severity: .low,

reason: "New section added"

))

}

// Compare functions

let oldFuncNames = Set(old.functions.map { $0.name })

for func_ in old.functions {

if let newFunc = new.functions.first(where: { $0.name == func_.name }) {

if func_.hash != newFunc.hash {

var changes: [String] = []

if func_.size != newFunc.size {

changes.append("Size: \(func_.size) → \(newFunc.size)")

}

if func_.complexity != newFunc.complexity {

changes.append("Complexity: \(func_.complexity) → \(newFunc.complexity)")

}

let severity: Severity = isSecuritySensitive(func_.name) ? .high : .medium

functionDiffs.append(FunctionDiff(

diffType: .modified,

oldFunc: func_,

newFunc: newFunc,

severity: severity,

changes: changes

))

}

} else {

let severity: Severity = isSecuritySensitive(func_.name) ? .high : .low

functionDiffs.append(FunctionDiff(

diffType: .removed,

oldFunc: func_,

newFunc: nil,

severity: severity,

changes: ["Function removed"]

))

}

for func_ in new.functions where !oldFuncNames.contains(func_.name) {

functionDiffs.append(FunctionDiff(

diffType: .added,

oldFunc: nil,

newFunc: func_,

severity: .info,

changes: ["New function"]

))

}

// Compare imports

let oldImports = Set(old.imports)

let newImports = Set(new.imports)

for imp in oldImports.subtracting(newImports) {

importDiffs[imp] = .removed

}

for imp in newImports.subtracting(oldImports) {

importDiffs[imp] = .added

}

// Compare exports

let oldExports = Set(old.exports)

let newExports = Set(new.exports)

for exp in oldExports.subtracting(newExports) {

exportDiffs[exp] = .removed

}

for exp in newExports.subtracting(oldExports) {

exportDiffs[exp] = .added

}

// Calculate similarity

let totalItems = old.functions.count + new.functions.count

let unchanged = old.functions.filter { oldF in

new.functions.contains { $0.hash == oldF.hash }

}.count * 2

let similarity = totalItems > 0 ? Double(unchanged) / Double(totalItems) * 100 : 100

return DiffAnalysis(

oldBinary: old,

newBinary: new,

sectionDiffs: sectionDiffs,

functionDiffs: functionDiffs,

importDiffs: importDiffs,

exportDiffs: exportDiffs,

similarityScore: similarity

)

}

// Print functions

func printBanner() {

print()

print("╔══════════════════════════════════════════════════════════════════╗")

print("║ NullSec BinaryDiff - Binary Comparison Tool ║")

print("╚══════════════════════════════════════════════════════════════════╝")

print()

}

func printUsage() {

print("USAGE:")

print(" binarydiff [OPTIONS] <old_binary> <new_binary>")

print()

print("OPTIONS:")

print(" -h, --help Show this help")

print(" -j, --json JSON output")

print(" -f, --functions Function-level diff only")

print(" -s, --sections Section-level diff only")

print()

print("EXAMPLES:")

print(" binarydiff app_v1 app_v2")

print(" binarydiff -f library.so.1 library.so.2")

}

func printSectionDiff(_ diff: SectionDiff) {

let col = diff.severity.color

let symbol: String

switch diff.diffType {

case .added: symbol = "+"

case .removed: symbol = "-"

case .modified: symbol = "~"

case .unchanged: symbol = " "

}

let name = diff.newSection?.name ?? diff.oldSection?.name ?? "unknown"

print()

print(" \(col.rawValue)[\(symbol)] \(name)\(Color.reset.rawValue)")

print(" Type: \(diff.diffType.rawValue)")

print(" Reason: \(diff.reason)")

if let oldS = diff.oldSection, let newS = diff.newSection {

if oldS.size != newS.size {

print(" Size: \(oldS.size) → \(newS.size)")

}

func printFunctionDiff(_ diff: FunctionDiff) {

let col = diff.severity.color

let sev = diff.severity.rawValue

let symbol: String

switch diff.diffType {

case .added: symbol = "+"

case .removed: symbol = "-"

case .modified: symbol = "~"

case .unchanged: symbol = " "

}

let name = diff.newFunc?.name ?? diff.oldFunc?.name ?? "unknown"

let secMarker = isSecuritySensitive(name) ? " 🔒" : ""

print()

print(" \(col.rawValue)[\(sev)] \(symbol) \(name)\(secMarker)\(Color.reset.rawValue)")

for change in diff.changes {

print(" • \(change)")

}

func printSummary(_ analysis: DiffAnalysis) {

print()

print("\(Color.gray.rawValue)═══════════════════════════════════════════\(Color.reset.rawValue)")

print()

print(" Summary:")

print(" Old Binary: \(analysis.oldBinary.path)")

print(" New Binary: \(analysis.newBinary.path)")

print(" Similarity: \(String(format: "%.1f", analysis.similarityScore))%")

print()

print(" Changes:")

print(" Sections: \(analysis.sectionDiffs.filter { $0.diffType != .unchanged }.count)")

print(" Functions: \(analysis.functionDiffs.filter { $0.diffType != .unchanged }.count)")

print(" Imports: \(analysis.importDiffs.count)")

print(" Exports: \(analysis.exportDiffs.count)")

let critCount = analysis.functionDiffs.filter { $0.severity == .critical }.count

let highCount = analysis.functionDiffs.filter { $0.severity == .high }.count

if critCount > 0 || highCount > 0 {

print()

print(" \(Color.red.rawValue)Security-Sensitive Changes: \(critCount + highCount)\(Color.reset.rawValue)")

}

func demoMode() {

print("\(Color.yellow.rawValue)[Demo Mode]\(Color.reset.rawValue)")

print()

print("\(Color.cyan.rawValue)Comparing sample binaries...\(Color.reset.rawValue)")

let oldBinary = demoBinaryOld()

let newBinary = demoBinaryNew()

let analysis = analyzeDiff(old: oldBinary, new: newBinary)

print()

print(" Section Differences:")

for diff in analysis.sectionDiffs {

printSectionDiff(diff)

}

print()

print(" Function Differences:")

for diff in analysis.functionDiffs.sorted(by: { $0.severity.rawValue < $1.severity.rawValue }) {

printFunctionDiff(diff)

}

if !analysis.importDiffs.isEmpty {

print()

print(" Import Changes:")

for (name, type) in analysis.importDiffs {

let symbol = type == .added ? "+" : "-"

print(" [\(symbol)] \(name)")

}

if !analysis.exportDiffs.isEmpty {

print()

print(" Export Changes:")

for (name, type) in analysis.exportDiffs {

let symbol = type == .added ? "+" : "-"

print(" [\(symbol)] \(name)")

}

printSummary(analysis)

}

// Main

printBanner()

let args = CommandLine.arguments

if args.count <= 1 {

printUsage()

print()

demoMode()

} else if args.contains("-h") || args.contains("--help") {

printUsage()

} else {

printUsage()

print()

demoMode()

}

nullsec-binarydiff/binarydiff.swift at main · bad-antics/nullsec-binarydiff · GitHub

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