[feat] Password Encryption

@@ -33,6 +33,9 @@ app.post('/register', (req, res) => {
 
   const user = new User(req.body) // req.body에 User의 정보를 저장
 
+  // 비밀번호 암호화
+
+
   // mongoDB에서 오는 메서드. 정보들이 user model에 저장
   user.save((err, userInfo) => {
     // 만약 에러가 나면, json형식으로 success:false를 보내주고, 에러메시지를 보내줌

 // monggoDB Model and Schema
 const mongoose = require('mongoose');
-
+// bcrypt 가져옴
+const bcrypt = require('bcrypt')
+// bcrypt 사용하기 위해 salt를 생성하고 그걸 이용해 암호화 시킴
+const saltRounds = 10   // salt를 몇글자 할 건지
 
 const userSchema = mongoose.Schema({
     name:{
@@ -32,6 +35,30 @@ const userSchema = mongoose.Schema({
     }
 })
 
+// index.js의 app.post('/register', (req, res)에 있는
+// user model에 user 정보를 저장하기 전에 무엇을 한다는 것
+// function( next )를 해서 얘네가 끝난 다음에 다음걸 실행해라~
+userSchema.pre('save', function( next ){
+    var user = this
+
+    if(user.isModified('password')) // password를 변경할 때만 적용되도록..
+    {
+        // 비밀번호 암호화 (https://www.npmjs.com/package/bcrypt 에서 가져옴)
+        bcrypt.genSalt(saltRounds, function(err, salt)  // salt를 만드는 함수
+        {
+            if(err) return next(err)  // 에러 나면 return err
+            bcrypt.hash(user.password, salt, function(err, hash) {   // bcrypt.hash(암호화되지 않은 pw, salt, function(err, 암호화된 비밀번호))
+                if(err) return next(err)    // 에러 나면 return err
+                user.password = hash    // 성공하면 user.password를 hash로 교체
+                next()    
+            });
+        });
+    }
+ 
+
+})
+
+
 // 만든 스키마를 모델로 감싸줌
 const User = mongoose.model('User', userSchema)
 

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@@ -1209,6 +1483,14 @@
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@@ -1289,6 +1571,11 @@
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@@ -1396,6 +1682,19 @@
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   }
 }

@@ -11,6 +11,7 @@
   "author": "mindyeoi",
   "license": "ISC",
   "dependencies": {
+    "bcrypt": "^5.0.1",
     "body-parser": "^1.19.0",
     "express": "^4.17.1",
     "mongoose": "^5.12.12"