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20 changes: 20 additions & 0 deletions
20
src/container/modules/node-transformers/DeadCodeInjectionTransformersModule.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| import { ContainerModule, interfaces } from 'inversify'; | ||
| import { ServiceIdentifiers } from '../../ServiceIdentifiers'; | ||
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| import { INodeTransformer } from '../../../interfaces/node-transformers/INodeTransformer'; | ||
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| import { NodeTransformer } from '../../../enums/node-transformers/NodeTransformer'; | ||
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| import { DeadCodeInjectionTransformer } from '../../../node-transformers/dead-code-injection-transformers/DeadCodeInjectionTransformer'; | ||
| import { ScopeThroughIdentifiersTransformer } from '../../../node-transformers/dead-code-injection-transformers/ScopeThroughIdentifiersTransformer'; | ||
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| export const deadCodeInjectionTransformersModule: interfaces.ContainerModule = new ContainerModule((bind: interfaces.Bind) => { | ||
| // dead code injection | ||
| bind<INodeTransformer>(ServiceIdentifiers.INodeTransformer) | ||
| .to(DeadCodeInjectionTransformer) | ||
| .whenTargetNamed(NodeTransformer.DeadCodeInjectionTransformer); | ||
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| bind<INodeTransformer>(ServiceIdentifiers.INodeTransformer) | ||
| .to(ScopeThroughIdentifiersTransformer) | ||
| .whenTargetNamed(NodeTransformer.ScopeThroughIdentifiersTransformer); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,30 @@ | ||
| import * as ESTree from 'estree'; | ||
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| import { TScopeIdentifiersTraverserVariableCallback } from '../../types/node/TScopeIdentifiersTraverserVariableCallback'; | ||
| import { TScopeIdentifiersTraverserCallback } from '../../types/node/TScopeIdentifiersTraverserCallback'; | ||
| import { IScopeIdentifiersTraverserCallbackData } from './IScopeIdentifiersTraverserCallbackData'; | ||
| import { IScopeThroughIdentifiersTraverserCallbackData } from './IScopeThroughIdentifiersTraverserCallbackData'; | ||
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| export interface IScopeIdentifiersTraverser { | ||
| /** | ||
| * @param {Program} programNode | ||
| * @param {Node | null} parentNode | ||
| * @param {TScopeIdentifiersTraverserVariableCallback} callback | ||
| * @param {TScopeIdentifiersTraverserCallback<IScopeIdentifiersTraverserCallbackData>} callback | ||
| */ | ||
| traverseScopeVariables ( | ||
| traverseScopeIdentifiers ( | ||
| programNode: ESTree.Program, | ||
| parentNode: ESTree.Node | null, | ||
| callback: TScopeIdentifiersTraverserVariableCallback | ||
| callback: TScopeIdentifiersTraverserCallback<IScopeIdentifiersTraverserCallbackData> | ||
| ): void; | ||
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| /** | ||
| * @param {Node} node | ||
| * @param {Node | null} parentNode | ||
| * @param {TScopeIdentifiersTraverserCallback<IScopeThroughIdentifiersTraverserCallbackData>} callback | ||
| */ | ||
| traverseScopeThroughIdentifiers ( | ||
| node: ESTree.Node, | ||
| parentNode: ESTree.Node | null, | ||
| callback: TScopeIdentifiersTraverserCallback<IScopeThroughIdentifiersTraverserCallbackData> | ||
| ): void; | ||
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| } |
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8 changes: 8 additions & 0 deletions
8
src/interfaces/node/IScopeThroughIdentifiersTraverserCallbackData.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| import * as eslintScope from 'eslint-scope'; | ||
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| import { TNodeWithLexicalScope } from '../../types/node/TNodeWithLexicalScope'; | ||
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| export interface IScopeThroughIdentifiersTraverserCallbackData { | ||
| reference: eslintScope.Reference; | ||
| variableLexicalScopeNode: TNodeWithLexicalScope; | ||
| } |
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146 changes: 146 additions & 0 deletions
146
src/node-transformers/dead-code-injection-transformers/ScopeThroughIdentifiersTransformer.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| import { inject, injectable, } from 'inversify'; | ||
| import { ServiceIdentifiers } from '../../container/ServiceIdentifiers'; | ||
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| import * as eslintScope from 'eslint-scope'; | ||
| import * as ESTree from 'estree'; | ||
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| import { TIdentifierObfuscatingReplacerFactory } from '../../types/container/node-transformers/TIdentifierObfuscatingReplacerFactory'; | ||
| import { TNodeWithLexicalScope } from '../../types/node/TNodeWithLexicalScope'; | ||
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| import { IIdentifierObfuscatingReplacer } from '../../interfaces/node-transformers/obfuscating-transformers/obfuscating-replacers/IIdentifierObfuscatingReplacer'; | ||
| import { IOptions } from '../../interfaces/options/IOptions'; | ||
| import { IRandomGenerator } from '../../interfaces/utils/IRandomGenerator'; | ||
| import { IScopeIdentifiersTraverser } from '../../interfaces/node/IScopeIdentifiersTraverser'; | ||
| import { IScopeThroughIdentifiersTraverserCallbackData } from '../../interfaces/node/IScopeThroughIdentifiersTraverserCallbackData'; | ||
| import { IVisitor } from '../../interfaces/node-transformers/IVisitor'; | ||
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| import { IdentifierObfuscatingReplacer } from '../../enums/node-transformers/obfuscating-transformers/obfuscating-replacers/IdentifierObfuscatingReplacer'; | ||
| import { NodeTransformationStage } from '../../enums/node-transformers/NodeTransformationStage'; | ||
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| import { AbstractNodeTransformer } from '../AbstractNodeTransformer'; | ||
| import { NodeGuards } from '../../node/NodeGuards'; | ||
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| /** | ||
| * Renames all through identifiers for Dead Code Injection | ||
| */ | ||
| @injectable() | ||
| export class ScopeThroughIdentifiersTransformer extends AbstractNodeTransformer { | ||
| /** | ||
| * @type {IIdentifierObfuscatingReplacer} | ||
| */ | ||
| private readonly identifierObfuscatingReplacer: IIdentifierObfuscatingReplacer; | ||
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| /** | ||
| * @type {IScopeIdentifiersTraverser} | ||
| */ | ||
| private readonly scopeIdentifiersTraverser: IScopeIdentifiersTraverser; | ||
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| /** | ||
| * @param {TIdentifierObfuscatingReplacerFactory} identifierObfuscatingReplacerFactory | ||
| * @param {IRandomGenerator} randomGenerator | ||
| * @param {IOptions} options | ||
| * @param {IScopeIdentifiersTraverser} scopeIdentifiersTraverser | ||
| */ | ||
| public constructor ( | ||
| @inject(ServiceIdentifiers.Factory__IIdentifierObfuscatingReplacer) | ||
| identifierObfuscatingReplacerFactory: TIdentifierObfuscatingReplacerFactory, | ||
| @inject(ServiceIdentifiers.IRandomGenerator) randomGenerator: IRandomGenerator, | ||
| @inject(ServiceIdentifiers.IOptions) options: IOptions, | ||
| @inject(ServiceIdentifiers.IScopeIdentifiersTraverser) scopeIdentifiersTraverser: IScopeIdentifiersTraverser | ||
| ) { | ||
| super(randomGenerator, options); | ||
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| this.identifierObfuscatingReplacer = identifierObfuscatingReplacerFactory( | ||
| IdentifierObfuscatingReplacer.BaseIdentifierObfuscatingReplacer | ||
| ); | ||
| this.scopeIdentifiersTraverser = scopeIdentifiersTraverser; | ||
| } | ||
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| /** | ||
| * @param {NodeTransformationStage} nodeTransformationStage | ||
| * @returns {IVisitor | null} | ||
| */ | ||
| public getVisitor (nodeTransformationStage: NodeTransformationStage): IVisitor | null { | ||
| switch (nodeTransformationStage) { | ||
| case NodeTransformationStage.DeadCodeInjection: | ||
| return { | ||
| enter: (node: ESTree.Node, parentNode: ESTree.Node | null): ESTree.Node | undefined => { | ||
| if (parentNode && NodeGuards.isProgramNode(node)) { | ||
| return this.transformNode(node, parentNode); | ||
| } | ||
| } | ||
| }; | ||
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| default: | ||
| return null; | ||
| } | ||
| } | ||
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| /** | ||
| * @param {VariableDeclaration} programNode | ||
| * @param {NodeGuards} parentNode | ||
| * @returns {NodeGuards} | ||
| */ | ||
| public transformNode (programNode: ESTree.Program, parentNode: ESTree.Node): ESTree.Node { | ||
| this.scopeIdentifiersTraverser.traverseScopeThroughIdentifiers( | ||
| programNode, | ||
| parentNode, | ||
| (data: IScopeThroughIdentifiersTraverserCallbackData) => { | ||
| const { | ||
| reference, | ||
| variableLexicalScopeNode | ||
| } = data; | ||
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| this.transformScopeThroughIdentifiers(reference, variableLexicalScopeNode); | ||
| } | ||
| ); | ||
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| return programNode; | ||
| } | ||
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| /** | ||
| * @param {Reference} reference | ||
| * @param {TNodeWithLexicalScope} lexicalScopeNode | ||
| */ | ||
| private transformScopeThroughIdentifiers ( | ||
| reference: eslintScope.Reference, | ||
| lexicalScopeNode: TNodeWithLexicalScope, | ||
| ): void { | ||
| if (reference.resolved) { | ||
| return; | ||
| } | ||
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| const identifier: ESTree.Identifier = reference.identifier; | ||
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| this.storeIdentifierName(identifier, lexicalScopeNode); | ||
| this.replaceIdentifierName(identifier, lexicalScopeNode, reference); | ||
| } | ||
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| /** | ||
| * @param {Identifier} identifierNode | ||
| * @param {TNodeWithLexicalScope} lexicalScopeNode | ||
| */ | ||
| private storeIdentifierName ( | ||
| identifierNode: ESTree.Identifier, | ||
| lexicalScopeNode: TNodeWithLexicalScope | ||
| ): void { | ||
| this.identifierObfuscatingReplacer.storeLocalName(identifierNode, lexicalScopeNode); | ||
| } | ||
|
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| /** | ||
| * @param {Identifier} identifierNode | ||
| * @param {TNodeWithLexicalScope} lexicalScopeNode | ||
| * @param {Variable} reference | ||
| */ | ||
| private replaceIdentifierName ( | ||
| identifierNode: ESTree.Identifier, | ||
| lexicalScopeNode: TNodeWithLexicalScope, | ||
| reference: eslintScope.Reference | ||
| ): void { | ||
| const newIdentifier: ESTree.Identifier = this.identifierObfuscatingReplacer | ||
| .replace(identifierNode, lexicalScopeNode); | ||
|
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| // rename of identifier | ||
| reference.identifier.name = newIdentifier.name; | ||
| } | ||
| } |
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