A tool for deriving PKG packet encryption keys for ps4 written in c++
| 1 | #pragma once |
| 2 | |
| 3 | #include "../ir/AST.h" |
| 4 | #include "../ir/IR.h" |
| 5 | #include "../lifter/VariableAnalysis.h" |
| 6 | #include "DominatorAnalysis.h" |
| 7 | #include "SymbolAnalysis.h" |
| 8 | #include <map> |
| 9 | #include <memory> |
| 10 | #include <set> |
| 11 | #include <stack> |
| 12 | |
| 13 | namespace ShadPKG::Decompiler::Analysis { |
| 14 | |
| 15 | // ╔═══════════════════════════════════════════════════════════════════════════╗ |
| 16 | // ║ STRUCTURAL ANALYSIS ║ |
| 17 | // ║ ║ |
| 18 | // ║ Transforms the Command Flow Graph (CFG) into a high-level AST. ║ |
| 19 | // ║ Detects Control Structures: ║ |
| 20 | // ║ - Linear Sequences (Basic Blocks) ║ |
| 21 | // ║ - If-Then / If-Then-Else ║ |
| 22 | // ║ - While Loops / Do-While Loops ║ |
| 23 | // ║ ║ |
| 24 | // ║ Algorithm: Recursive Refinement / Region Structuring ║ |
| 25 | // ╚═══════════════════════════════════════════════════════════════════════════╝ |
| 26 | |
| 27 | class StructuralAnalysis { |
| 28 | public: |
| 29 | StructuralAnalysis( |
| 30 | std::shared_ptr<IR::Function> func, |
| 31 | std::shared_ptr<DominatorAnalysis> domAnalysis, |
| 32 | std::shared_ptr<SymbolAnalysis> symbolAnalysis, |
| 33 | std::shared_ptr<Lifter::VariableAnalysis> varAnalysis = nullptr); |
| 34 | |
| 35 | // ═══════════════════════════════════════════════════════════════════════ |
| 36 | // Main Analysis Method |
| 37 | // ═══════════════════════════════════════════════════════════════════════ |
| 38 | |
| 39 | std::shared_ptr<AST::FunctionAST> analyze(); |
| 40 | |
| 41 | private: |
| 42 | std::shared_ptr<IR::Function> func_; |
| 43 | std::shared_ptr<DominatorAnalysis> dom_; |
| 44 | std::shared_ptr<SymbolAnalysis> symbols_; |
| 45 | std::shared_ptr<Lifter::VariableAnalysis> vars_; |
| 46 | |
| 47 | // Set of blocks already structured/visited to prevent infinite recursion |
| 48 | std::set<uint64_t> structuredBlocks_; |
| 49 | |
| 50 | // Set of loop headers currently being matched to prevent infinite recursion |
| 51 | std::set<uint64_t> activeLoops_; |
| 52 | |
| 53 | // Set of labels that have already been emitted for a goto statement |
| 54 | std::set<uint64_t> emittedLabels_; |
| 55 | |
| 56 | // Set of blocks that are targets of goto statements (need labels) |
| 57 | std::set<uint64_t> gotoTargets_; |
| 58 | |
| 59 | // ═══════════════════════════════════════════════════════════════════════ |
| 60 | // Recursive Structuring |
| 61 | // ═══════════════════════════════════════════════════════════════════════ |
| 62 | |
| 63 | // Structure a region starting at 'entry' |
| 64 | std::shared_ptr<AST::Statement> structureRegion(uint64_t entryBlock, |
| 65 | uint64_t stopBlock = 0); |
| 66 | |
| 67 | // Structure a single basic block into a list of statements |
| 68 | std::shared_ptr<AST::CompoundStatement> |
| 69 | structureBlock(const std::shared_ptr<IR::BasicBlock> &bb); |
| 70 | |
| 71 | // ═══════════════════════════════════════════════════════════════════════ |
| 72 | // Pattern Matchers |
| 73 | // ═══════════════════════════════════════════════════════════════════════ |
| 74 | |
| 75 | // Try to match a loop starting at header |
| 76 | std::shared_ptr<AST::Statement> matchLoop(uint64_t header, |
| 77 | uint64_t stopBlock); |
| 78 | |
| 79 | // Try to match an If-Then-Else starting at block |
| 80 | std::shared_ptr<AST::Statement> matchIf(uint64_t block, uint64_t stopBlock); |
| 81 | |
| 82 | // Try to match a Switch starting at block |
| 83 | std::shared_ptr<AST::Statement> matchSwitch(uint64_t block, |
| 84 | uint64_t stopBlock); |
| 85 | |
| 86 | // ═══════════════════════════════════════════════════════════════════════ |
| 87 | // Instruction Lifting Helpers |
| 88 | // ═══════════════════════════════════════════════════════════════════════ |
| 89 | |
| 90 | // Convert IR instruction to AST statement(s) |
| 91 | std::shared_ptr<AST::Statement> liftInstruction(const IR::Instruction &instr); |
| 92 | |
| 93 | // Extract condition from a block ending in a conditional jump |
| 94 | std::shared_ptr<AST::Expression> |
| 95 | extractCondition(const std::shared_ptr<IR::BasicBlock> &bb, bool invert); |
| 96 | |
| 97 | // Helper to get basic block by ID |
| 98 | std::shared_ptr<IR::BasicBlock> getBlock(uint64_t id); |
| 99 | }; |
| 100 | |
| 101 | } // namespace ShadPKG::Decompiler::Analysis |
| 102 |