AST-原理+babel安装

zy-AST-原理+babel安装/AST-原理+babel安装.md

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+## ast
+
+ast抽象语法树
+
+## var a = 1 如果翻译成ast
+
+    "root":{
+        "赋值语句"：{
+            "左边"：{
+                "名称"："a",
+                "其他的信息"：....
+            },
+            "右边"：1
+        }
+    }
+ 
+发现json文件能很好的描述tree结构，可以对上面数据做增删改查
+
+## ob混淆 sojson
+
+你提交一断js代码 -》混淆器（ast）-》返回到网页
+
+## 哪些地方用到ast
+
+    ide 
+    格式化
+    js压缩
+    v8 解释器
+
+## ast 插件 babel
+
+    https://www.babeljs.cn/
+    
+Babel 是一个 JavaScript 编译器。
+
+Babel 是一个工具链，主要用于将采用 ECMAScript 2015+ 语法编写的代码转换为向后兼容的 JavaScript 语法，以便能够运行在当前和旧版本的浏览器或其他环境中。
+
+es6 -> es5
+
+js只有语法没有实现，跨平台 -》 
+    
+    1.一次编译多个解释器运行 mono java js，都有不同平台的解释器
+    2.多次编译，直接运行 c++（v8） gcc 指定运行平台
+    
+Babel 手册
+
+    https://github.com/jamiebuilds/babel-handbook/blob/master/translations/zh-Hans/README.md
+    
+安装 babel-core 代码
+
+    npm install babel-core
+    
+测试编译成ast代码
+
+    var babel = require("@babel/core");
+    
+    var code = "var a = 1;";
+    
+    const result = babel.transform(code, {ast: true});
+    console.log(result.code);
+    console.log("分割----");
+    console.log(result);
+    console.log("分割----");
+    console.log(result.ast.program.body);
+    
+输出效果 body 里面才有真正的内容
+
+    var a = 1;
+    分割----
+    {
+      metadata: {},
+      options: {
+        assumptions: {},
+        ast: true,
+        targets: {},
+        cloneInputAst: true,
+        babelrc: false,
+        configFile: false,
+        browserslistConfigFile: false,
+        passPerPreset: false,
+        envName: 'development',
+        cwd: '/home/aiyingfeng/spider/js_reverse/zy-AST-原理+babel安装',
+        root: '/home/aiyingfeng/spider/js_reverse/zy-AST-原理+babel安装',
+        rootMode: 'root',
+        plugins: [],
+        presets: [],
+        parserOpts: { sourceType: 'module', sourceFileName: undefined, plugins: [] },
+        generatorOpts: {
+          filename: undefined,
+          auxiliaryCommentBefore: undefined,
+          auxiliaryCommentAfter: undefined,
+          retainLines: undefined,
+          comments: true,
+          shouldPrintComment: undefined,
+          compact: 'auto',
+          minified: undefined,
+          sourceMaps: false,
+          sourceRoot: undefined,
+          sourceFileName: 'unknown'
+        }
+      },
+      ast: Node {
+        type: 'File',
+        start: 0,
+        end: 10,
+        loc: SourceLocation {
+          start: [Position],
+          end: [Position],
+          filename: undefined,
+          identifierName: undefined
+        },
+        errors: [],
+        program: Node {
+          type: 'Program',
+          start: 0,
+          end: 10,
+          loc: [SourceLocation],
+          sourceType: 'module',
+          interpreter: null,
+          body: [Array],
+          directives: [],
+          leadingComments: undefined,
+          innerComments: undefined,
+          trailingComments: undefined
+        },
+        comments: [],
+        leadingComments: undefined,
+        innerComments: undefined,
+        trailingComments: undefined
+      },
+      code: 'var a = 1;',
+      map: null,
+      sourceType: 'module',
+      externalDependencies: Set(0) {}
+    }
+    分割----
+    [
+      Node {
+        type: 'VariableDeclaration',
+        start: 0,
+        end: 10,
+        loc: SourceLocation {
+          start: [Position],
+          end: [Position],
+          filename: undefined,
+          identifierName: undefined
+        },
+        declarations: [ [Node] ],
+        kind: 'var',
+        leadingComments: undefined,
+        innerComments: undefined,
+        trailingComments: undefined
+      }
+    ]
+
+输出效果

zy-AST-原理+babel安装/babel_test.js

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+var babel = require("@babel/core");
+
+var code = "var a = 1;";
+
+const result = babel.transform(code, {ast: true});
+console.log(result.code);
+console.log("分割----");
+console.log(result);
+console.log("分割----");
+console.log(result.ast.program.body);

zy-AST-原理+babel安装/babel_test2.js

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+// 将JS源码转换成语法树
+var parser = require("@babel/parser");
+// 为parser提供模板引擎
+var template = require("@babel/template").default;
+// 遍历AST
+var traverse = require("@babel/traverse").default;
+// 操作节点，比如判断节点类型，生成新的节点等
+var t = require("@babel/types");
+// 可以直接用type声明一断新的代码
+// 将语法树转换为源代码
+var generator = require("@babel/generator").default;
+// 操作文件
+var fs = require("fs");
+
+var jscode = fs.readFileSync("read.js", {     //更改读取文件
+    encoding: "utf-8"
+});
+
+let ast = parser.parse(jscode);
+
+console.log(ast);
+

zy-AST-原理+babel安装/read.js

@@ -0,0 +1 @@
+var a = 1;

zy-ast-hook-内存漫游/ast-hook-内存漫游.md

@@ -48,3 +48,5 @@
     hook.search('c99546cf032aaa5a679230de9a95c7db')
     
 ![debugger](../img/60.png)
+
+很轻松就定位到加密参数在内存中的位置