use of org.mapleir.ir.code.expr.ArithmeticExpr in project maple-ir by LLVM-but-worse.
the class ExpressionEvaluator method simplifyMultiplication.
private Expr simplifyMultiplication(LocalsPool pool, ArithmeticExpr e) {
if (e.getOperator() != Operator.MUL)
throw new IllegalArgumentException("Only works on multiplication exprs");
Expr r = e.getRight();
ConstantExpr re = eval(pool, r);
if (re != null) {
Object o = re.getConstant();
if (o instanceof Integer || o instanceof Long) {
if (FieldRSADecryptionPass.__eq((Number) o, 1, o instanceof Long)) {
return e.getLeft().copy();
} else if (FieldRSADecryptionPass.__eq((Number) o, 0, o instanceof Long)) {
return new ConstantExpr(0, re.getType());
}
}
}
return null;
}
use of org.mapleir.ir.code.expr.ArithmeticExpr in project maple-ir by LLVM-but-worse.
the class FieldRSADecryptionPass method transform.
private void transform(AnalysisContext cxt) {
for (ClassNode cn : cxt.getApplication().iterate()) {
for (MethodNode m : cn.methods) {
ControlFlowGraph cfg = cxt.getIRCache().getFor(m);
for (BasicBlock b : cfg.vertices()) {
for (Stmt stmt : b) {
// String fsKey = "";
if (stmt.getOpcode() == Opcode.FIELD_STORE) {
FieldStoreStmt fs = (FieldStoreStmt) stmt;
// [enc, dec]
Number[] p = pairs.get(key(fs));
if (p != null) {
Expr e = fs.getValueExpression();
e.unlink();
ArithmeticExpr ae = new ArithmeticExpr(new ConstantExpr(p[1], ConstantExpr.computeType(p[1])), e, Operator.MUL);
fs.setValueExpression(ae);
// fsKey = key(fs);
}
}
for (Expr e : stmt.enumerateOnlyChildren()) {
if (e.getOpcode() == FIELD_LOAD) {
CodeUnit par = e.getParent();
FieldLoadExpr fl = (FieldLoadExpr) e;
// [enc, dec]
Number[] p = pairs.get(key(fl));
if (p == null) {
continue;
}
if (par.getOpcode() == ARITHMETIC) {
ArithmeticExpr ae = (ArithmeticExpr) par;
if (ae.getRight().getOpcode() == CONST_LOAD) {
ConstantExpr ce = (ConstantExpr) ae.getRight();
Number cst = (Number) ce.getConstant();
Number res = __mul(cst, p[0], p[0].getClass().equals(Long.class));
// if(!__eq(res, 1, p[0].getClass().equals(Long.class))) {
// System.out.println(cst + " -> " + res);
// System.out.println(" expr: " + fl.getRootParent());
// }
par.overwrite(new ConstantExpr(res, ConstantExpr.computeType(res)), par.indexOf(ce));
continue;
}
}
ArithmeticExpr ae = new ArithmeticExpr(new ConstantExpr(p[0], ConstantExpr.computeType(p[0])), fl.copy(), Operator.MUL);
par.overwrite(ae, par.indexOf(fl));
}
}
}
}
}
}
// for(ClassNode cn : cxt.getClassTree().getClasses().values()) {
// for(MethodNode m : cn.methods) {
// ControlFlowGraph cfg = cxt.getCFGS().getIR(m);
//
// for(BasicBlock b : cfg.vertices()) {
// for(Stmt stmt : b) {
// for(Expr e : stmt.enumerateOnlyChildren()) {
// if(e.getOpcode() == Opcode.ARITHMETIC) {
// ArithmeticExpr ae = (ArithmeticExpr) e;
// if(ae.getRight().getOpcode() == Opcode.CONST_LOAD) {
// ConstantExpr c = (ConstantExpr) ae.getRight();
// Object o = c.getConstant();
//
// if(o instanceof Long || o instanceof Integer) {
// Number n = (Number) o;
// if(__eq(n, 1, ae.getType().equals(Type.LONG_TYPE))) {
// Expr l = ae.getLeft();
// l.unlink();
//
// CodeUnit aePar = ae.getParent();
// aePar.overwrite(l, aePar.indexOf(ae));
// } else if(__eq(n, 0, ae.getType().equals(Type.LONG_TYPE))) {
// c.unlink();
//
// CodeUnit aePar = ae.getParent();
// aePar.overwrite(c, aePar.indexOf(ae));
// }
// }
// }
// }
// }
// }
// }
// }
// }
}
use of org.mapleir.ir.code.expr.ArithmeticExpr in project maple-ir by LLVM-but-worse.
the class FieldRSADecryptionPass method accept.
@Override
public int accept(AnalysisContext cxt, IPass prev, List<IPass> completed) {
this.cxt = cxt;
for (MethodNode m : cxt.getIRCache().getActiveMethods()) {
ControlFlowGraph cfg = cxt.getIRCache().getFor(m);
for (BasicBlock b : cfg.vertices()) {
for (Stmt stmt : b) {
for (Expr c : stmt.enumerateOnlyChildren()) {
if (c.getOpcode() == ARITHMETIC) {
ArithmeticExpr arith = (ArithmeticExpr) c;
if (arith.getOperator() == Operator.MUL) {
Expr l = arith.getLeft();
Expr r = arith.getRight();
if (r.getOpcode() == CONST_LOAD && l.getOpcode() == FIELD_LOAD) {
FieldLoadExpr fle = (FieldLoadExpr) l;
ConstantExpr constt = (ConstantExpr) r;
Number n = (Number) constt.getConstant();
boolean isLong = (n instanceof Long);
if (__eq(n, 1, isLong) || __eq(n, 0, isLong)) {
continue;
}
if (n instanceof Integer || n instanceof Long) {
cdecs.getNonNull(key(fle)).add(n);
}
}
}
}
}
if (stmt.getOpcode() == FIELD_STORE) {
FieldStoreStmt fss = (FieldStoreStmt) stmt;
Expr val = fss.getValueExpression();
if (bcheck1(val)) {
if (val.getOpcode() == CONST_LOAD) {
ConstantExpr c = (ConstantExpr) val;
if (c.getConstant() instanceof Integer || c.getConstant() instanceof Long) {
Number n = (Number) c.getConstant();
if (large(n, c.getConstant() instanceof Long)) {
cencs.getNonNull(key(fss)).add(n);
}
}
}
continue;
}
ArithmeticExpr ar = (ArithmeticExpr) val;
if (ar.getRight().getOpcode() == CONST_LOAD) {
ConstantExpr c = (ConstantExpr) ar.getRight();
Number n = (Number) c.getConstant();
boolean isLong = c.getConstant() instanceof Long;
if (__eq(n, 1, isLong) || __eq(n, 0, isLong)) {
continue;
}
if (ar.getOperator() == Operator.ADD) {
if (!large(n, isLong)) {
continue;
}
}
cencs.getNonNull(key(fss)).add(n);
}
}
}
for (Stmt stmt : b) {
if (stmt.getOpcode() == FIELD_STORE) {
if (key((FieldStoreStmt) stmt).equals("co.k I")) {
// System.out.println("HERE1: " + stmt);
//
// System.out.println(cfg);
}
handleFss((FieldStoreStmt) stmt);
}
for (Expr e : stmt.enumerateOnlyChildren()) {
if (e.getOpcode() == FIELD_LOAD) {
if (key((FieldLoadExpr) e).equals("co.k I")) {
// System.out.println("HERE2: " + stmt);
}
handleFle(stmt, (FieldLoadExpr) e);
}
}
}
}
}
Set<String> keys = new HashSet<>();
keys.addAll(cencs.keySet());
keys.addAll(cdecs.keySet());
for (String k : keys) {
boolean _longint = k.endsWith("J");
Set<Number> encs = cencs.getNonNull(k);
Set<Number> decs = cdecs.getNonNull(k);
try {
Number[] pair = get_pair(encs, decs, constants.getNonNull(k), _longint);
if (pair.length != 2) {
Set<Number> extended = new HashSet<>(constants.getNonNull(k));
extended.addAll(dangerConstants.getNonNull(k));
pair = get_pair(encs, decs, extended, _longint);
}
if (pair.length != 2) {
// System.out.println("No pair for: " + k);
// System.out.println("Constants: " + constants.getNonNull(k));
// System.out.println("Dconsts : " + dangerConstants.getNonNull(k));
// System.out.println("Encs : " + encs);
// System.out.println("Decs : " + decs);
} else {
pairs.put(k, pair);
// System.out.println("for: " + k + ": " + Arrays.toString(pair));
}
} catch (IllegalStateException e) {
System.err.println();
System.err.println("Constants: " + constants.getNonNull(k));
System.out.println("Dconsts : " + dangerConstants.getNonNull(k));
System.err.println("Encs : " + encs);
System.err.println("Decs : " + decs);
System.err.println("key: " + k);
throw e;
}
}
System.out.printf(" identified %n field encoder/decoder pairs.%n", pairs.size());
transform(cxt);
return pairs.size();
}
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