diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..a7cdac7
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/.name b/.idea/.name
new file mode 100644
index 0000000..30de634
--- /dev/null
+++ b/.idea/.name
@@ -0,0 +1 @@
+main.go
\ No newline at end of file
diff --git a/.idea/dataSources.xml b/.idea/dataSources.xml
new file mode 100644
index 0000000..327110c
--- /dev/null
+++ b/.idea/dataSources.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="snctf.db" uuid="1f1ae82f-c0e0-4fcb-a9c5-2156507a34a7">
+      <driver-ref>sqlite.xerial</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$/snctf.db</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..ce39718
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/snctf.iml" filepath="$PROJECT_DIR$/.idea/snctf.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/snctf.iml b/.idea/snctf.iml
new file mode 100644
index 0000000..338a266
--- /dev/null
+++ b/.idea/snctf.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/api/admin/auth.go b/api/admin/auth.go
new file mode 100644
index 0000000..07c7ead
--- /dev/null
+++ b/api/admin/auth.go
@@ -0,0 +1,38 @@
+package admin
+
+import (
+	"github.com/gin-gonic/gin"
+	."main.go/type"
+	"main.go/api"
+
+)
+
+
+
+// AuthRequired 用于管理员权限控制的中间件
+func AuthRequired()gin.HandlerFunc {
+	return func(c *gin.Context) {
+		session, err := api.Store.Get(c.Request, "SNCTFSESSID")
+		if err != nil {
+			c.JSON(200, gin.H{"code": 400, "msg": "Get SNCTFSESSID error"})
+			c.Abort()
+			return
+		}
+
+		user, ok := session.Values["user"].(User)
+		if !ok {
+			c.JSON(200, gin.H{"code": 400, "msg": "No session"})
+			c.Abort()
+			return
+		}
+
+		if user.Role != 1 {
+			c.JSON(200, gin.H{"code": 400, "msg": "Unauthorized access!"})
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+
+}
diff --git a/api/admin/challenge.go b/api/admin/challenge.go
new file mode 100644
index 0000000..8e73dc6
--- /dev/null
+++ b/api/admin/challenge.go
@@ -0,0 +1,79 @@
+package admin
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"main.go/api"
+	db "main.go/database"
+	. "main.go/type"
+	"strings"
+)
+
+// CrDb 专门用作给数据替换。
+type CrDb struct {
+	Name        string   `json:"name" binding:"required"`
+	Score       int      `json:"score" binding:"required"`
+	Flag        string   `json:"flag"` // 暂时一个题只能一个flag
+	Description string   `json:"description"`
+	Attachment  string `json:"attachment"`
+	Category    string   `json:"category" binding:"required"`
+	Tags        string   `json:"tags"`
+	Hints       string `json:"hints"`
+	Visible     int      `json:"visible"`
+}
+
+
+//NewChallenge 新建一个题目
+func NewChallenge(c *gin.Context){
+	var request ChallengeRequest
+	if err := c.ShouldBindJSON(&request); err != nil {
+		fmt.Println(err)
+		c.JSON(400, gin.H{"code": 400, "msg": "Request format wrong!"})
+		return
+	}
+	challenge := &Challenge{
+		Name:        request.Name,
+		Score:       request.Score,
+		Flag:        request.Flag,
+		Description: request.Description,
+		Attachment:  request.Attachment,
+		Category:    request.Category,
+		Tags:        request.Tags,
+		Hints:       request.Hints,
+		Visible:     request.Visible,
+	}
+	if err := addChallenge(challenge); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Add challenge failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "msg": "Add challenge success!"})
+}
+
+//addChallenge 添加题目内容
+func addChallenge(c *Challenge) error {
+	api.Link()
+	DB := db.DBsnctf
+	// 使用逗号分隔字符串
+	attachmentString := strings.Join(c.Attachment, ",")
+	hintString := strings.Join(c.Hints, ",")
+	crdb := &CrDb{
+		Name: c.Name,
+		Score: c.Score,
+		Flag: c.Flag,
+		Description: c.Description,
+		Attachment: attachmentString,
+		Category: c.Category,
+		Tags: c.Tags,
+		Hints: hintString,
+		Visible: c.Visible,
+	}
+	//插入数据
+	err := DB.Table("challenge").Create(crdb).Error
+	//command := "INSERT INTO challenge (name,score,flag,description,attachment,category,tags,hints,visible) VALUES (?,?,?,?,?,?,?,?,?);"
+	//err := DB.Debug().Raw(command,c.Name, c.Score, c.Flag, c.Description, attachmentString, c.Category, c.Tags, hintString, c.Visible).Error
+	if err != nil {
+		return err
+	}
+	return nil
+}
\ No newline at end of file
diff --git a/api/category.go b/api/category.go
new file mode 100644
index 0000000..1e47078
--- /dev/null
+++ b/api/category.go
@@ -0,0 +1,58 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	db "main.go/database"
+
+)
+
+
+// GetCategories 获取所有题目分类。
+func GetCategories(c *gin.Context)  {
+	var categories []string
+
+	if err := getAllCategories(&categories); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get categories failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": categories})
+
+
+}
+
+
+//getAllCategories 操作数据库所有题目分类
+func getAllCategories(categories *[]string) error {
+	Link()
+	DB := db.DBsnctf
+	rows,err:= DB.Raw("select category from category").Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var category string
+		if err := rows.Scan(&category); err != nil {
+			return err
+		}
+		*categories = append(*categories, category)
+	}
+	return rows.Err()
+
+}
+
+// CheckCategory 检查类别是否正确
+func CheckCategory(c string) bool {
+	var categories []string
+	if err := getAllCategories(&categories); err != nil {
+		return false
+	}
+
+	for _, category := range categories {
+		if category == c {
+			return true
+		}
+	}
+	return false
+}
diff --git a/api/challenge.go b/api/challenge.go
new file mode 100644
index 0000000..7b1da66
--- /dev/null
+++ b/api/challenge.go
@@ -0,0 +1,84 @@
+package api
+
+import (
+	"errors"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	db "main.go/database"
+	. "main.go/type"
+	"strings"
+)
+
+//GetAllChallenges 获取全部题目
+
+func GetAllChallenges(c * gin.Context){
+	var challenges []ChallengeResponse
+
+	if err := getAllChallenges(c, &challenges); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get all challenges failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": challenges})
+
+}
+
+//GetChallengesByCategory 获取某个分类下的题目
+
+func GetChallengesByCategory(c *gin.Context){
+	category := c.Param("category")
+	if matched := CheckCategory(category); !matched {
+		c.JSON(400, gin.H{"code": 400, "msg": "Wrong category!"})
+		return
+	}
+	var challenges []ChallengeResponse
+	if err := getAllChallenges(c, &challenges); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get all challenges failure!"})
+		return
+	}
+	c.JSON(200, gin.H{"code": 200, "data": challenges})
+
+}
+
+
+// getAllChallenges 操作数据库获取所有题目。
+func getAllChallenges(c *gin.Context, challenges *[]ChallengeResponse) error {
+	var attachmentString, hints string
+	Link()
+	DB := db.DBsnctf
+	rows,err := DB.Raw("SELECT id, name, score, description, attachment, category, tags, hints FROM challenge WHERE visible=1;").Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next(){
+		var challenge ChallengeResponse
+		err = rows.Scan(&challenge.ID, &challenge.Name, &challenge.Score, &challenge.Description, &attachmentString, &challenge.Category, &challenge.Tags, &hints)
+		fmt.Println(err)
+		if err != nil {
+			return err
+		}
+		// 解析为切片
+		challenge.Attachment = strings.Split(attachmentString, ",")
+		challenge.Hints = strings.Split(hints, ",")
+
+		solverCount, err := getSolverCount(challenge.ID)
+		if err != nil {
+			return err
+		}
+		challenge.SolverCount = solverCount
+		session, err := Store.Get(c.Request, "SNCTFSESSID")
+		if err != nil {
+			c.JSON(200, gin.H{"code": 400, "msg": "Get SNCTFSESSID error"})
+			return err
+		}
+		user, ok := session.Values["user"].(User)
+		if !ok {
+			c.JSON(200, gin.H{"code": 400, "msg": "No session"})
+			return errors.New("no session")
+		}
+		challenge.IsSolved = hasAlreadySolved(user.ID, challenge.ID)
+		*challenges = append(*challenges, challenge)
+	}
+	return rows.Err()
+}
diff --git a/api/notice.go b/api/notice.go
new file mode 100644
index 0000000..24db265
--- /dev/null
+++ b/api/notice.go
@@ -0,0 +1,39 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	. "main.go/type"
+	db "main.go/database"
+)
+
+// GetAllNotices 获取所有的公告
+func GetAllNotices(c *gin.Context) {
+	var notices []Notice
+	if err := getAllNotices(&notices); err != nil {
+		c.JSON(200, gin.H{"code": 400, "msg": "Get all notices failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": notices})
+}
+
+
+func getAllNotices(notices *[]Notice) error {
+	Link()
+	DB := db.DBsnctf
+	command := "SELECT id, title, content, created_at FROM notice ORDER BY created_at ASC;"
+	rows, err := DB.Raw(command).Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var b Notice
+		err = rows.Scan(&b.ID, &b.Title, &b.Content, &b.CreatedAt)
+		if err != nil {
+			return err
+		}
+		*notices = append(*notices, b)
+	}
+	return rows.Err()
+}
diff --git a/api/score.go b/api/score.go
new file mode 100644
index 0000000..08f3e64
--- /dev/null
+++ b/api/score.go
@@ -0,0 +1,78 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	db "main.go/database"
+	"main.go/tools"
+	. "main.go/type"
+)
+
+//GetAllScore 获取所有的积分,按照积分降序排列
+func GetAllScore(c *gin.Context){
+	var s ScoreResponse
+	var scores []ScoreResponse
+	Link()
+	DB :=db.DBsnctf
+	//rows,err := DB.Raw("SELECT s.id, s.username, s.score FROM score AS s, user AS u WHERE u.hidden = 0 AND s.username = u.username ORDER BY s.score DESC;").Scan(&s).Rows()
+	rows,err := DB.Debug().Raw("SELECT s.id, s.username, s.score FROM score AS s, user AS u WHERE u.hidden = 0 AND s.username = u.username ORDER BY s.score DESC;").Rows()
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get all score error!"})
+		return
+	}
+	// 循环读取数据
+	for rows.Next() {
+		rows.Scan(&s.ID, &s.Username, &s.Score)
+		scores = append(scores, s)
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": scores})
+}
+
+//GetScoreByUserId 获取用户分数
+func GetScoreByUserId(c *gin.Context)  {
+	var score int
+	Link()
+	DB := db.DBsnctf
+	//获取用户id
+	id := c.Params.ByName("id")
+	if id == "" {
+		c.JSON(400, gin.H{"code": 400, "msg": "Need id!"})
+		return
+	}
+	//检查id是否合法
+	if !tools.CheckID(id) {
+		c.JSON(400, gin.H{"code": 400, "msg": "ID format error!"})
+		return
+	}
+	//查询用户信息
+	err := DB.Raw("SELECT s.score FROM score AS s, user AS u WHERE u.id = ? AND u.hidden = 0 AND u.username = s.username LIMIT 1;", id).Scan(&score).Error
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get info error!"})
+		return
+	}
+	c.JSON(200, gin.H{"code": 200, "data": score})
+}
+
+
+//GetSelfScoreAndRank 获取当前登录用户的分数和排名
+func GetSelfScoreAndRank(c *gin.Context){
+	var scoreAndRank ScoreRankResponse
+	DB := db.DBsnctf
+	session, err := Store.Get(c.Request, "SNCTFSESSID")
+	if err != nil {
+		c.JSON(200, gin.H{"code": 400, "msg": "Get SNCTFSESSID error"})
+		return
+	}
+	user, ok := session.Values["user"].(User)
+	if !ok {
+		c.JSON(200, gin.H{"code": 400, "msg": "No session"})
+		return
+	}
+	err = DB.Raw("SELECT score, (SELECT count(DISTINCT score) FROM score WHERE score>=s.score) AS rank FROM score AS s,user AS u WHERE u.id = ? AND u.username = s.username ORDER BY score DESC LIMIT 1;",user.ID).Scan(&scoreAndRank).Error
+	if err != nil {
+		c.JSON(200, gin.H{"code": 400, "msg": "Get info error!"})
+		return
+	}
+	c.JSON(200, gin.H{"code": 200, "data": scoreAndRank})
+
+}
diff --git a/api/session.go b/api/session.go
new file mode 100644
index 0000000..11ae31f
--- /dev/null
+++ b/api/session.go
@@ -0,0 +1,27 @@
+package api
+
+import (
+	"encoding/gob"
+	"github.com/gorilla/securecookie"
+	"github.com/gorilla/sessions"
+	. "main.go/type"
+)
+
+
+// sessions 存储于文件系统
+var Store *sessions.FilesystemStore
+
+func init() {
+	Store = sessions.NewFilesystemStore("./sessions", securecookie.GenerateRandomKey(32))
+
+	Store.Options = &sessions.Options{
+		Domain: "",
+		Path:   "/",
+		MaxAge: 24 * 60 * 60, // 1 day
+		// SameSite: http.SameSiteNoneMode,
+		Secure:   false,
+		HttpOnly: false,
+	}
+
+	gob.Register(User{})
+}
diff --git a/api/solve.go b/api/solve.go
new file mode 100644
index 0000000..bf95559
--- /dev/null
+++ b/api/solve.go
@@ -0,0 +1,153 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	db "main.go/database"
+	."main.go/type"
+	"strconv"
+)
+
+//GetAllSolves 获取所有解题记录
+func GetAllSolves(c *gin.Context){
+	var solves []SolveResponse
+
+	if err := getAllSolves(&solves); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get all solves failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": solves})
+}
+//GetSolvesByCid 获取某个用户的所有解题记录
+func GetSolvesByCid(c *gin.Context){
+	var solves []SolveResponse
+
+	cid, err := strconv.ParseInt(c.Param("cid"), 10, 64)
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get solves failure!"})
+		return
+	}
+
+	if err := getSolvesByCid(&solves, int(cid)); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get solves failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": solves})
+}
+
+// GetSolvesByUid 根据用户id获取正确的flag提交记录。
+func GetSolvesByUid(c *gin.Context) {
+	uid, err := strconv.ParseInt(c.Param("uid"), 10, 64)
+	if err != nil {
+
+		c.JSON(400, gin.H{"code": 400, "msg": "Wrong uid!"})
+		return
+	}
+
+	if uid == 1 {
+		c.JSON(400, gin.H{"code": 400, "msg": "Not allowed!"})
+		return
+	}
+
+	var solves []SolveResponse
+	if err := getSolvesByUid(&solves, int(uid)); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get specified solves failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": solves})
+}
+
+// GetSelfSolves 获取当前用户的所有解题记录
+func GetSelfSolves(c *gin.Context){
+	var solves []SolveResponse
+
+	session, err := Store.Get(c.Request, "SNCTFSESSID")
+	if err != nil {
+		c.JSON(200, gin.H{"code": 400, "msg": "Get SNCTFSESSID error"})
+		return
+	}
+	user, ok := session.Values["user"].(User)
+	if !ok {
+		c.JSON(200, gin.H{"code": 400, "msg": "No session"})
+		return
+	}
+
+	if err := getSolvesByUid(&solves, user.ID); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get self solves failure!"})
+		return
+	}
+
+	c.JSON(200, gin.H{"code": 200, "data": solves})
+}
+
+// getSolverCount 操作数据库获取指定id题目的解出人数。
+func getSolverCount(id int) (count int, err error) {
+	Link()
+	DB := db.DBsnctf
+	//SELECT COUNT(*) FROM solve WHERE cid = ?;
+	err = DB.Table("solve").Select("COUNT(*)").Where("cid = ?", id).Scan(&count).Error
+	if err != nil {
+		return 0, err
+	}
+	return count, nil
+}
+
+
+
+// getAllSolves 操作数据库获取所有正确的提交记录，按提交时间从早到晚排序。
+func getAllSolves(solves *[]SolveResponse) error {
+	DB :=db.DBsnctf
+	rows,err := DB.Raw("SELECT s.id, s.uid, s.cid, u.username, c.name, s.submitted_at, c.score FROM solve AS s, user AS u, challenge AS c WHERE u.hidden=0 AND s.uid=u.id AND s.cid=c.id ORDER BY s.submitted_at ASC;").Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var s SolveResponse
+		err = rows.Scan(&s.ID, &s.Uid, &s.Cid, &s.Username, &s.ChallengeName, &s.SubmittedAt, &s.Score)
+		if err != nil {
+			return err
+		}
+		*solves = append(*solves, s)
+	}
+	return rows.Err()
+}
+
+// getSolvesByUid 操作数据库根据用户id获取正确的flag提交记录，按提交时间从早到晚排序。
+func getSolvesByUid(solves *[]SolveResponse, uid int) error {
+	DB :=db.DBsnctf
+	rows,err := DB.Debug().Raw("SELECT s.id, s.uid, s.cid, u.username, c.name, s.submitted_at, c.score FROM solve AS s, user AS u, challenge AS c WHERE u.hidden=0 AND s.uid=? AND u.id=s.uid AND c.id=s.cid ORDER BY s.submitted_at ASC;",uid).Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var s SolveResponse
+		err = rows.Scan(&s.ID, &s.Uid, &s.Cid, &s.Username, &s.ChallengeName, &s.SubmittedAt, &s.Score)
+		if err != nil {
+			return err
+		}
+		*solves = append(*solves, s)
+	}
+	return rows.Err()
+}
+// getSolvesByCid 操作数据库根据题目id获取正确的提交记录，按提交时间从早到晚排序。
+func getSolvesByCid(solves *[]SolveResponse, cid int) error {
+	DB :=db.DBsnctf
+	rows,err := DB.Raw("SELECT s.id, s.uid, s.cid, u.username, c.name, s.submitted_at, c.score FROM solve AS s, user AS u, challenge AS c WHERE u.hidden=0 AND s.cid=? AND u.id=s.uid AND c.id=s.cid ORDER BY s.submitted_at ASC;",cid).Rows()
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var s SolveResponse
+		err = rows.Scan(&s.ID, &s.Uid, &s.Cid, &s.Username, &s.ChallengeName, &s.SubmittedAt, &s.Score)
+		if err != nil {
+			return err
+		}
+		*solves = append(*solves, s)
+	}
+	return rows.Err()
+}
\ No newline at end of file
diff --git a/api/submissions.go b/api/submissions.go
new file mode 100644
index 0000000..5efed2c
--- /dev/null
+++ b/api/submissions.go
@@ -0,0 +1,211 @@
+package api
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	db "main.go/database"
+	"main.go/tools"
+	. "main.go/type"
+	"math"
+)
+
+// hasAlreadySolved 检查某道题是否已经被某用户解出。
+func hasAlreadySolved(uid int, cid int) (exists bool) {
+	Link()
+	DB := db.DBsnctf
+	err := DB.Raw("SELECT EXISTS(SELECT 1 FROM solve WHERE uid=? AND cid=?)",uid,cid).Scan(&exists).Error
+	if  err != nil {
+		return false
+	}
+	return exists
+}
+// isChallengeExisted 检查数据库中是否存在某个题目。
+func isChallengeExisted(id int) (exists bool) {
+	Link()
+	DB := db.DBsnctf
+	command := "SELECT EXISTS(SELECT 1 FROM challenge WHERE id = ?);"
+	err := DB.Raw(command,id).Scan(&exists).Error
+	if err != nil {
+		return false
+	}
+	return exists
+}
+
+//addSubmission 添加一个提交记录。
+func addSubmission(s *Submission) error {
+	Link()
+	DB := db.DBsnctf
+	err := DB.Table("submission").Create(&s).Error
+	if err != nil {
+		return err
+	}
+
+	return nil
+
+}
+
+// getFlag 根据题目id获取该题的flag
+func getFlag(id int) (flag string, err error) {
+	Link()
+	DB := db.DBsnctf
+	err = DB.Table("challenge").Select("flag").Where("id = ?",id).Find(&flag).Error
+	if err != nil {
+		return "", err
+	}
+	return flag, nil
+}
+
+// addSolve 操作数据库加入一条正确的flag提交记录。
+func addSolve(s *Solve) error {
+	DB := db.DBsnctf
+	err := DB.Table("solve").Create(&s).Error
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// addUserScore 操作数据库为指定用户增加某题的分数。
+func addUserScore(username string, cid int) error {
+	var newScore int
+	DB := db.DBsnctf
+	err := DB.Table("challenge").Select("score").Where("id = ?", cid).Find(&newScore).Error
+	if err != nil {
+		return err
+	}
+
+	command := "UPDATE score SET score=score+? WHERE username=?"
+	err = DB.Exec(command, newScore, username).Error
+	if err != nil {
+		return err
+	}
+	return nil
+}
+// updateUserScores 操作数据库更新解出用户的分数。
+func updateUserScores(reducedScore, cid int) error {
+
+	DB:=db.DBsnctf
+	command := "UPDATE score SET score=score-? WHERE EXISTS(SELECT 1 FROM user,solve WHERE user.id=solve.uid AND score.username=user.username AND solve.cid=?);"
+	err := DB.Exec(command, reducedScore, cid).Error
+
+	return err
+}
+
+// editChallengeScore 操作数据库修改指定题目增的动态分数。
+func editChallengeScore(cid int) (reducedScore int, err error) {
+	DB := db.DBsnctf
+	var currentScore int
+	err = DB.Table("challenge").Select("score").Where("id = ?", cid).Find(&currentScore).Error
+	command := "SELECT score FROM challenge WHERE id=? LIMIT 1;"
+	if err != nil {
+		return 0, err
+	}
+
+	solverCount, err := getSolverCount(cid)
+	if err != nil {
+		return 0, err
+	}
+	// According to https://github.com/o-o-overflow/scoring-playground
+	newScore := int(100 + (1000-100)/(1.0+float64(solverCount)*0.04*math.Log(float64(solverCount))))
+	reducedScore = currentScore - newScore
+
+	command = "UPDATE challenge SET score=? WHERE id=?;"
+	err = DB.Exec(command, newScore, cid).Error
+	if err != nil {
+		return 0, err
+	}
+
+	return reducedScore, nil
+}
+
+// SubmitFlag 提交flag
+func SubmitFlag(c *gin.Context) {
+	var request SubmissionRequest
+	if err := c.ShouldBindJSON(&request); err != nil {
+
+		c.JSON(400, gin.H{"code": 400, "msg": "Request format wrong!"})
+		return
+	}
+
+	session,err := Store.Get(c.Request, "SNCTFSESSID")
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "GET SNCTFSESSID error!"})
+		return
+	}
+	user,ok := session.Values["user"].(User)
+	if !ok {
+		c.JSON(400, gin.H{"code": 400, "msg": "GET user error!"})
+		return
+	}
+	// 检查题目是否存在
+	if !isChallengeExisted(request.Cid) {
+		c.JSON(400, gin.H{"code": 400, "msg": "Challenge not existed!"})
+		return
+	}
+	// Submission记录
+	solvedTime := tools.Timestamp()
+	submission := &Submission{
+		UserID:      user.ID,
+		ChallengeID: request.Cid,
+		Flag:        request.Flag,
+		IP:          c.ClientIP(),
+		Time:        solvedTime,
+	}
+	err = addSubmission(submission)
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Record submission failure!"})
+		return
+	}
+	// 是否已经解出该题
+	if hasAlreadySolved(user.ID, request.Cid) {
+		c.JSON(400, gin.H{"code": 400, "msg": "Already solved!"})
+		return
+	}
+	// 获取flag
+	flag, err := getFlag(request.Cid)
+	if err != nil {
+		fmt.Println(err)
+		c.JSON(400, gin.H{"code": 400, "msg": "Get flag failure!"})
+		return
+	}
+	// 检查flag是否正确
+	if flag != request.Flag {
+		c.JSON(400, gin.H{"code": 400, "msg": "Wrong flag!"})
+		return
+	}else {
+		// Solve记录
+		solve := &Solve{
+			UserID:      user.ID,
+			ChallengeID: request.Cid,
+			Time:        solvedTime,
+		}
+		err = addSolve(solve)
+		if err != nil {
+			c.JSON(400, gin.H{"code": 400, "msg": "Record solve failure!"})
+			return
+		}
+		//加分
+		err = addUserScore(user.Username, request.Cid)
+		if err != nil {
+			c.JSON(400, gin.H{"code": 400, "msg": "Add score failure!"})
+			return
+		}
+		// 题目动态分数
+
+		reducedScore, err := editChallengeScore(request.Cid)
+		if err != nil {
+			c.JSON(400, gin.H{"code": 400, "msg": "Edit challenge score failure!"})
+			return
+		}
+		//更新所有用户分数
+		err = updateUserScores(reducedScore, request.Cid)
+		if err != nil {
+			c.JSON(400, gin.H{"code": 400, "msg": "Update user scores failure!"})
+			return
+		}
+		c.JSON(200, gin.H{"code": 200, "msg": "Correct flag!"})
+		return
+
+	}
+
+}
\ No newline at end of file
diff --git a/api/user.go b/api/user.go
new file mode 100644
index 0000000..71580aa
--- /dev/null
+++ b/api/user.go
@@ -0,0 +1,296 @@
+package api
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	_ "gorm.io/driver/sqlite"
+	db "main.go/database"
+	"main.go/tools"
+	. "main.go/type"
+	"regexp"
+	"unicode/utf8"
+)
+
+//连接数据库
+func Link() {
+	err := db.Inimysql()
+	if err != nil{
+		panic(err)
+	}
+}
+
+
+
+
+func Login(c * gin.Context) {
+	var request LoginRequest
+	var user User
+
+	Link()
+	DB := db.DBsnctf
+	DB.AutoMigrate(&User{})
+	//用ShouldBindJSON解析绑定传入的Json数据。
+	if err := c.ShouldBindJSON(&request); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Bind json error!"})
+		return
+	}
+	//code 0用户名不存在
+	//code 1用户名或密码错误
+
+	err := DB.Take(&user,"username = ?",request.Username).Error
+	if err != nil {
+		c.JSON(200,gin.H{
+			"Error":true,
+			"Msg":"登陆失败",
+			"Code": 0,
+		})
+		return
+	}
+	//判断md5值与数据库内容是否相同
+	if user.Password != tools.MD5(request.Password){
+		c.JSON(200,gin.H{
+			"Error":true,
+			"Msg":"用户名或密码错误",
+			"Code": 1,
+		})
+		return
+	}
+	//身份认证结束
+	//session
+	// 设置session
+	session, _ := Store.Get(c.Request, "SNCTFSESSID")
+	user.Password = ""
+	// 根据remember值设置session有效期
+	if request.Remember {
+		session.Options.MaxAge = 7 * 24 * 60 * 60 // 7 days
+	} else {
+		session.Options.MaxAge = 24 * 60 * 60 // 1 day
+	}
+	//保存session
+	session.Values["user"] = user
+
+	err = session.Save(c.Request, c.Writer)
+	fmt.Println(err)
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Save SNCTFSESSID error"})
+		return
+	}
+	//登录成功
+	c.JSON(200, gin.H{"code": 200, "username": user.Username, "role": user.Role, "msg": "Login success!"})
+
+}
+
+
+func Register(c *gin.Context)  {
+	var request RegisterRequest
+	var user User
+	var score ScoreResponse
+
+	Link()
+	DB := db.DBsnctf
+	err := DB.AutoMigrate(&User{})
+	if err != nil {
+		return
+	}
+
+	//用ShouldBindJSON解析绑定传入的Json数据。
+	if err := c.ShouldBindJSON(&request); err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Bind json error!"})
+		return
+	}
+	//限制传入用户名为中文、数字、大小写字母下划线和横杠，1到10位
+	if !checkUsername(request.Username) {
+		c.JSON(200, gin.H{
+			"Error": true,
+			"Msg": "用户名不符合规范",
+			"Code": 2,
+		})
+		return
+	}
+	//限制密码长度6到20位
+	if !checkPassword(request.Password) {
+		c.JSON(400, gin.H{"code": 400, "msg": "Password format error!"})
+		return
+	}
+	//限制传入邮箱符合格式
+	if !checkEmail(request.Email) {
+		c.JSON(400, gin.H{"code": 400, "msg": "Email format error!"})
+		return
+	}
+	//判断用户名是否已被使用
+	if isNameExisted(user, request.Username) {
+		c.JSON(200, gin.H{"code": 1000, "msg": "Username has already been used!"})
+		return
+	}
+	//判断邮箱是否已被使用
+	if isEmailExisted(user, request.Email) {
+		c.JSON(200, gin.H{"code": 1001, "msg": "Email has already been used!"})
+		return
+	}
+	user.Token = tools.Token()
+	user.Username = request.Username
+	user.Password = tools.MD5(request.Password)
+	user.Email = request.Email
+	user.Created = tools.Timestamp()
+	score.Score = 0
+	score.Username =request.Username
+	//创建数据
+	err1 := DB.Table("user").Create(&user).Error
+	err2 := DB.Table("score").Create(&score).Error
+	if err1 != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Register error!"})
+		return
+	}
+	if err2 != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Register error!"})
+		return
+	}
+
+	c.JSON(200, gin.H{
+		"success": "注册成功",
+	})
+
+
+}
+
+// Logout 实现用户注销登陆
+func Logout(c *gin.Context) {
+	var user User
+
+	session, err := Store.Get(c.Request, "SNCTFSESSID")
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get CTFGOSESSID error"})
+		return
+	}
+	user, ok := session.Values["user"].(User)
+	if !ok {
+		c.JSON(400, gin.H{"code": 400, "msg": "No session"})
+		return
+	}
+
+	session.Options.MaxAge = -1
+	err = session.Save(c.Request, c.Writer)
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Save CTFGOSESSID error"})
+		return
+	}
+
+	fmt.Sprintf("[%s] logout success!", user.Username)
+	c.JSON(200, gin.H{"code": 200, "msg": "Logout success!"})
+}
+//GetInfoByUserId 获取用户信息
+func GetInfoByUserId(c *gin.Context)  {
+	var info PublicInfoResponse
+	Link()
+	DB := db.DBsnctf
+	//获取用户id
+	id := c.Params.ByName("id")
+	if id == "" {
+		c.JSON(400, gin.H{"code": 400, "msg": "Need id!"})
+		return
+	}
+	//检查id是否合法
+
+
+	if !tools.CheckID(id) {
+		c.JSON(400, gin.H{"code": 400, "msg": "ID format error!"})
+		return
+	}
+
+	err := DB.Debug().Raw("SELECT username,affiliation,country,team_id FROM user WHERE id = ? LIMIT 1", id).Scan(&info).Error
+	//err := DB.Where("id = ?", id).First(user).Error
+	if err != nil {
+		c.JSON(400, gin.H{"code": 400, "msg": "Get info error!"})
+		return
+	}
+	c.JSON(200, gin.H{"code": 200, "data": info})
+
+
+}
+
+
+// checkUsername 验证用户名是否符合中文数字字母下划线横杠，长度1到10位，返回true或false
+func checkUsername(username string) bool {
+	if !(utf8.RuneCountInString(username) > 0) || !(utf8.RuneCountInString(username) < 11) {
+		return false
+	}
+	pattern := `^[-\w\p{Han}]+$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(username)
+}
+
+// checkEmail 验证是否符合邮箱格式，返回true或false
+func checkEmail(email string) bool {
+	pattern := `^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(email)
+}
+
+
+// checkPassword 验证密码是否符合长度6到20位，返回true或false
+func checkPassword(password string) bool {
+	if !(utf8.RuneCountInString(password) > 5) || !(utf8.RuneCountInString(password) < 21) {
+		return false
+	}
+	return true
+}
+// isNameExisted 判断用户名是否已经被占用，被占用返回true，未被占用则返回false
+func isNameExisted(user User, username string) bool {
+	Link()
+	DB := db.DBsnctf
+	err := DB.First(&user,"Username = ?",username).Error
+	if err != nil {
+		return false
+	}
+	return true
+
+}
+// isNameExisted 判断邮箱是否已经被占用，被占用返回true，未被占用则返回false
+func isEmailExisted(user User, email string) bool {
+	Link()
+	DB := db.DBsnctf
+
+	err := DB.First(&user,"Email = ?",email).Error
+	if err != nil {
+		return false
+	}
+	return true
+}
+
+// Session 获取当前用户session信息
+func Session(c *gin.Context) {
+	var user User
+
+	// 默认在此之前已经通过了中间件的session权限验证
+	session, _ := Store.Get(c.Request, "SNCTFSESSID")
+	user = session.Values["user"].(User)
+
+	c.JSON(200, gin.H{"code": 200, "data": user})
+}
+
+
+
+//下面是身份认证用 AUTH部分
+// AuthRequired 用于普通用户权限控制的中间件
+func AuthRequired()gin.HandlerFunc{
+	return func(c *gin.Context) {
+		session, err := Store.Get(c.Request, "SNCTFSESSID")
+		if err != nil {
+			c.JSON(400, gin.H{"code": 400, "msg": "Get SNCTFSESSID error"})
+			c.Abort()
+			return
+		}
+		user, ok := session.Values["user"].(User)
+		if !ok {
+			c.JSON(400, gin.H{"code": 400, "msg": "No session"})
+			c.Abort()
+			return
+		}
+		if user.Role != 0&&user.Role!=1{
+			c.JSON(400, gin.H{"code": 400, "msg": "Permission denied"})
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}
\ No newline at end of file
diff --git a/database/db.go b/database/db.go
new file mode 100644
index 0000000..b043abb
--- /dev/null
+++ b/database/db.go
@@ -0,0 +1,30 @@
+package database
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/schema"
+)
+
+//定义全局数据库
+var (
+	DBsnctf *gorm.DB
+)
+//定义全局数据库连接
+func Inimysql()(err error){
+	DBsnctf, err = gorm.Open(sqlite.Open("snctf.db"), &gorm.Config{
+		NamingStrategy: schema.NamingStrategy{
+		SingularTable: true, // 使用单数表名
+	},
+	})
+	if err != nil {
+		panic("failed to connect database")
+	}
+	return
+}
+func DBLink() {
+	err := Inimysql()
+	if err != nil{
+		panic(err)
+	}
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..b5002e5
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,31 @@
+module main.go
+
+go 1.17
+
+require (
+	github.com/gin-gonic/gin v1.7.7
+	github.com/gorilla/securecookie v1.1.1
+	github.com/gorilla/sessions v1.2.1
+	gorm.io/driver/sqlite v1.3.2
+	gorm.io/gorm v1.23.5
+)
+
+require (
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.13.0 // indirect
+	github.com/go-playground/universal-translator v0.17.0 // indirect
+	github.com/go-playground/validator/v10 v10.4.1 // indirect
+	github.com/golang/protobuf v1.3.3 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.9 // indirect
+	github.com/leodido/go-urn v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.12 // indirect
+	github.com/mattn/go-sqlite3 v1.14.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
+	github.com/ugorji/go/codec v1.1.7 // indirect
+	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
+	golang.org/x/sys v0.0.0-20200116001909-b77594299b42 // indirect
+	gopkg.in/yaml.v2 v2.2.8 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..35a23bd
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,73 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.7.7 h1:3DoBmSbJbZAWqXJC3SLjAPfutPJJRN1U5pALB7EeTTs=
+github.com/gin-gonic/gin v1.7.7/go.mod h1:axIBovoeJpVj8S3BwE0uPMTeReE4+AfFtqpqaZ1qq1U=
+github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
+github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
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diff --git a/identifier.sqlite b/identifier.sqlite
new file mode 100644
index 0000000..e69de29
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..bd73550
--- /dev/null
+++ b/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "main.go/routers"
+
+func main()  {
+	routers.Initrouter()
+}
\ No newline at end of file
diff --git a/routers/router.go b/routers/router.go
new file mode 100644
index 0000000..488bcff
--- /dev/null
+++ b/routers/router.go
@@ -0,0 +1,72 @@
+package routers
+
+import (
+	"github.com/gin-gonic/gin"
+	"main.go/api"
+	"main.go/api/admin"
+)
+
+
+func Initrouter(){
+	router := gin.Default()
+	api_v1 := router.Group("/api/v1")
+
+	//公共接口（无需登录）
+	public := api_v1.Group("")
+	{
+		//用户登录
+		public.POST("/login",api.Login)
+		//用户注册
+		public.POST("/register",api.Register)
+		//用户登出
+		public.GET("/logout",api.Logout)
+		//获取指定id用户可公开信息
+		public.GET("/user/:id",api.GetInfoByUserId)
+		//获取指定id用户分数
+		public.GET("/score/:id",api.GetScoreByUserId)
+		//获取所有用户分数,降序排列
+		public.GET("/score",api.GetAllScore)
+		//获取全部公告
+		public.GET("/notice",api.GetAllNotices)
+
+	}
+	// 普通用户api，需要用户登陆且Role=0才能访问
+	personal := api_v1.Group("/user")
+	personal.Use(api.AuthRequired())
+	{
+		// 获取当前用户信息
+		personal.GET("/session", api.Session)
+		// 获取题目分类
+		personal.GET("/category", api.GetCategories)
+		// 获取所有题目信息
+		personal.GET("/challenges/all", api.GetAllChallenges)
+		// 获取指定分类题目信息
+		personal.GET("/challenges/:category", api.GetChallengesByCategory)
+
+		// 提交flag
+		personal.POST("/submitflag", api.SubmitFlag)
+		// 获取所有正确的flag提交记录
+		personal.GET("/solves/all", api.GetAllSolves)
+		// 获取指定用户正确的flag提交记录
+		personal.GET("/solves/uid/:uid", api.GetSolvesByUid)
+		// 获取指定题目正确的flag提交记录
+		personal.GET("/solves/cid/:cid", api.GetSolvesByCid)
+		// 获取当前用户正确flag提交记录（即解题记录）按时间从早到晚排序
+		personal.GET("/solves/self", api.GetSelfSolves)
+		// 获取当前用户分数、排名
+		personal.GET("/score/self", api.GetSelfScoreAndRank)
+		// 校内排行api，暂时留空
+	}
+	// 管理员api，需要用户登陆且Role=1才能访问
+	manager := api_v1.Group("/admin")
+	manager.Use(admin.AuthRequired())
+	{
+		// 创建新题目
+		manager.POST("/challenge", admin.NewChallenge)
+	}
+
+
+
+
+	router.Run(":9000")
+}
\ No newline at end of file
diff --git a/sessions/session_2ITIVHA4ARV5V5LQT3OB6I6CQ7JKVPEHO5PRTGKXA6QF37YRVA7Q b/sessions/session_2ITIVHA4ARV5V5LQT3OB6I6CQ7JKVPEHO5PRTGKXA6QF37YRVA7Q
new file mode 100644
index 0000000..2b0acdd
--- /dev/null
+++ b/sessions/session_2ITIVHA4ARV5V5LQT3OB6I6CQ7JKVPEHO5PRTGKXA6QF37YRVA7Q
@@ -0,0 +1 @@
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diff --git a/sessions/session_2LTA5Y2QR7MWGJVV4LT2W6GZQYFXVQVJL3EIRTBYKIEAQYSE4Q3Q b/sessions/session_2LTA5Y2QR7MWGJVV4LT2W6GZQYFXVQVJL3EIRTBYKIEAQYSE4Q3Q
new file mode 100644
index 0000000..a88259a
--- /dev/null
+++ b/sessions/session_2LTA5Y2QR7MWGJVV4LT2W6GZQYFXVQVJL3EIRTBYKIEAQYSE4Q3Q
@@ -0,0 +1 @@
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new file mode 100644
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--- /dev/null
+++ b/sessions/session_34GMETWVQOK6PRWVCOCWAKR4QY5LOPJOW3NRM6WBHBP5JPO2KF6Q
@@ -0,0 +1 @@
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\ No newline at end of file
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new file mode 100644
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new file mode 100644
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diff --git a/snctf.db b/snctf.db
new file mode 100644
index 0000000..1461359
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diff --git a/tools/aes.go b/tools/aes.go
new file mode 100644
index 0000000..c29d6d5
--- /dev/null
+++ b/tools/aes.go
@@ -0,0 +1,55 @@
+package tools
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+)
+
+var Aeskey = []byte("snowywar12345678") //aeskey
+
+//@brief:填充明文
+func PKCS5Padding(plaintext []byte, blockSize int) []byte{
+	padding := blockSize-len(plaintext)%blockSize
+	padtext := bytes.Repeat([]byte{byte(padding)},padding)
+	return append(plaintext,padtext...)
+}
+
+//@brief:去除填充数据
+func PKCS5UnPadding(origData []byte) []byte{
+	length := len(origData)
+	unpadding := int(origData[length-1])
+	return origData[:(length - unpadding)]
+}
+
+//@brief:AES加密
+func AesEncrypt(origData, key []byte) ([]byte, error){
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+
+	//AES分组长度为128位，所以blockSize=16，单位字节
+	blockSize := block.BlockSize()
+	origData = PKCS5Padding(origData,blockSize)
+	blockMode := cipher.NewCBCEncrypter(block,key[:blockSize])	//初始向量的长度必须等于块block的长度16字节
+	crypted := make([]byte, len(origData))
+	blockMode.CryptBlocks(crypted,origData)
+	return crypted, nil
+}
+
+//@brief:AES解密
+func AesDecrypt(crypted, key []byte) ([]byte, error) {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+
+	//AES分组长度为128位，所以blockSize=16，单位字节
+	blockSize := block.BlockSize()
+	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])	//初始向量的长度必须等于块block的长度16字节
+	origData := make([]byte, len(crypted))
+	blockMode.CryptBlocks(origData, crypted)
+	origData = PKCS5UnPadding(origData)
+	return origData, nil
+}
\ No newline at end of file
diff --git a/tools/checkid.go b/tools/checkid.go
new file mode 100644
index 0000000..1271ad3
--- /dev/null
+++ b/tools/checkid.go
@@ -0,0 +1,14 @@
+package tools
+
+import "regexp"
+
+// CheckID 验证id是否为非负正整数。
+func CheckID(id string) bool {
+	if id == "1" {
+		return false
+	}
+	pattern := `^[1-9]\d*$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(id)
+}
+
diff --git a/tools/md5.go b/tools/md5.go
new file mode 100644
index 0000000..03166e7
--- /dev/null
+++ b/tools/md5.go
@@ -0,0 +1,13 @@
+package tools
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+)
+
+func MD5(v string)string{
+	d := []byte(v)
+	m := md5.New()
+	m.Write(d)
+	return hex.EncodeToString(m.Sum(nil))
+}
diff --git a/tools/token.go b/tools/token.go
new file mode 100644
index 0000000..db441fe
--- /dev/null
+++ b/tools/token.go
@@ -0,0 +1,35 @@
+package tools
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+	"time"
+)
+
+// Random 生成随机数。
+func Random() []byte {
+	b := make([]byte, 32)
+	//ReadFull从rand.Reader精确地读取len(b)字节数据填充进b
+	//rand.Reader是一个全局、共享的密码用强随机数生成器
+	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+		fmt.Printf("random number generation error: %v", err)
+	}
+	return b
+}
+
+// Token 生成随机token。
+func Token() string {
+	b := Random()[:16]
+	return fmt.Sprintf("%x", b)
+}
+
+// Timestamp 用于获取当前10位数时间戳。
+func Timestamp() int {
+	// time_zone := time.FixedZone("UTC", 0)
+	// t := time.Now().In(time_zone).Unix()
+	t := time.Now().Unix()
+	return int(t)
+}
+
+
diff --git a/type/adminTypes.go b/type/adminTypes.go
new file mode 100644
index 0000000..1b807c0
--- /dev/null
+++ b/type/adminTypes.go
@@ -0,0 +1,20 @@
+package types
+
+// ChallengeRequest 定义新增/修改题目的一个请求
+type ChallengeRequest struct {
+	Name        string   `json:"name" binding:"required"`
+	Score       int      `json:"score" binding:"required"`
+	Flag        string   `json:"flag"` // 暂时一个题只能一个flag
+	Description string   `json:"description"`
+	Attachment  []string `json:"attachment"`
+	Category    string   `json:"category" binding:"required"`
+	Tags        string   `json:"tags"`
+	Hints       []string `json:"hints"`
+	Visible     int      `json:"visible"`
+}
+
+// NoticeRequest 定义新增公告的一个请求
+type NoticeRequest struct {
+	Title   string `form:"title" json:"title" binding:"required"`
+	Content string `form:"content" json:"content" binding:"required"`
+}
diff --git a/type/commentypes.go b/type/commentypes.go
new file mode 100644
index 0000000..04fc37b
--- /dev/null
+++ b/type/commentypes.go
@@ -0,0 +1,58 @@
+package types
+
+//user定义用户结构体。
+type User struct {
+	ID          int    `json:"id"`          //用户id，唯一，自增
+	Token       string `json:"token"`       //用户token，唯一
+	Username    string `json:"username"`    //用户名，唯一
+	Password    string `json:"password"`    //用户密码md5值，md5(原密码）
+	Email       string `json:"email"`       //邮箱，唯一
+	Affiliation string `json:"affiliation"` //组织、战队或机构等，非必需，默认为0
+	Country     string `json:"country"`     //国家，非必需，默认为0
+	Website     string `json:"website"`     //个人链接，默认为0
+	Hidden      int    `json:"hidden"`      //1：隐藏，0：显示，默认为0
+	Banned      int    `json:"banned"`      //1：禁止，0：正常，默认为1，邮箱激活后为0
+	TeamID      int    `json:"team_id"`     //队伍id，在团队模式下必须，个人模式非必需，默认为0
+	Created     int    `json:"created"`     //用户注册时间，10位数时间戳
+	Role        int    `json:"role"`        //0：普通用户，默认为0，1：普通管理员，2：所有者（最高权限）
+}
+
+// Notice 定义一个公告
+type Notice struct {
+	ID        int    `json:"id"`
+	Title     string `json:"title"`
+	Content   string `json:"content"`
+	CreatedAt int    `json:"created_at"`
+}
+
+// Challenge 定义一个题目
+type Challenge struct {
+	ID          int      `json:"id"`
+	Name        string   `json:"name"`
+	Score       int      `json:"score"`
+	Flag        string   `json:"flag"`
+	Description string   `json:"description"`
+	Attachment  []string `json:"attachment"`
+	Category    string   `json:"category"`
+	Tags        string   `json:"tags"`
+	Hints       []string `json:"hints"`
+	Visible     int      `json:"visible"` // 0表示隐藏，1表示可见
+}
+
+// Submission 表示一次flag提交记录
+type Submission struct {
+	ID          int    `json:"id"`
+	UserID      int    `json:"uid" gorm:"column:uid"`
+	ChallengeID int    `json:"cid" gorm:"column:cid"`
+	Flag        string `json:"flag"`
+	IP          string `json:"ip"`
+	Time        int    `json:"submitted_at" gorm:"column:submitted_at"`
+}
+
+// Solve 表示一次正确的flag提交记录
+type Solve struct {
+	ID          int `json:"id" `
+	UserID      int `json:"uid" gorm:"column:uid"`
+	ChallengeID int `json:"cid" gorm:"column:cid"`
+	Time        int `json:"solved_at" gorm:"column:submitted_at"`
+}
diff --git a/type/userTypes.go b/type/userTypes.go
new file mode 100644
index 0000000..1983a08
--- /dev/null
+++ b/type/userTypes.go
@@ -0,0 +1,124 @@
+package types
+
+// LoginRequest 定义接收登录数据的结构体。
+type LoginRequest struct {
+	// binding:"required"修饰的字段，若接收为空值，则报错，是必须字段
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+	Remember bool   `json:"remember"`
+}
+
+// RegisterRequest 定义接收注册数据的结构体。
+type RegisterRequest struct {
+	Username  string `json:"username" binding:"required"`
+	Password  string `json:"password" binding:"required"`
+	Email     string `json:"email" binding:"required"`
+	CaptchaID string `json:"captchaid" binding:"required"`
+	Solution  string `json:"solution" binding:"required"`
+}
+
+// InfoRequest 定义接收用户修改信息的结构体。
+type InfoRequest struct {
+	Username    string `json:"username"`
+	Password    string `json:"password"`
+	Email       string `json:"email"`
+	Affiliation string `json:"affiliation"`
+	Country     string `json:"country"`
+	Website     string `json:"website"`
+}
+
+// InstallRequest 定义接收installRequest数据的结构体。
+type InstallRequest struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+	Email    string `json:"email" binding:"required"`
+}
+
+// SubmissionRequest 定义接收提交flag数据的结构体。
+type SubmissionRequest struct {
+	Cid  int    `json:"cid" binding:"required"`
+	Flag string `json:"flag" binding:"required"`
+}
+
+// StudentInfo 定义校内学生信息结构体。
+type StudentInfo struct {
+	Username  string `json:"username"`
+	StudentID string `json:"student_id"`
+	QQ        string `json:"qq"`
+}
+
+// SubmitStudentInfoRequest 定义接收提交校内学生用户信息的结构体。
+type SubmitStudentInfoRequest struct {
+	Student1 StudentInfo `json:"student1" binding:"required"`
+	Student2 StudentInfo `json:"student2"`
+	Student3 StudentInfo `json:"student3"`
+	Student4 StudentInfo `json:"student4"`
+}
+
+// OthersInfo 定义校外用户信息结构体。
+type OthersInfo struct {
+	Username string `json:"username"`
+	Email    string `json:"email"`
+	QQ       string `json:"qq"`
+}
+
+// SubmitOthersInfoRequest 定义接收提交校外学生用户信息的结构体。
+type SubmitOthersInfoRequest struct {
+	Others1 OthersInfo `json:"others1" binding:"required"`
+	Others2 OthersInfo `json:"others2"`
+	Others3 OthersInfo `json:"others3"`
+	Others4 OthersInfo `json:"others4"`
+}
+
+// ScoreResponse 定义返回得分情况结构体。
+type ScoreResponse struct {
+	ID       int    `json:"id"`
+	Username string `json:"username"`
+	Score    int    `json:"score"`
+}
+
+// SolveResponse 定义返回解题情况结构体。
+type SolveResponse struct {
+	ID            int    `json:"id"`
+	Uid           int    `json:"uid"`
+	Cid           int    `json:"cid"`
+	Username      string `json:"username"`
+	ChallengeName string `json:"challenge_name"`
+	SubmittedAt   int    `json:"submitted_at"`
+	Score         int    `json:"score"`
+}
+
+// PublicInfoResponse 定义返回用户公开信息结构体。
+type PublicInfoResponse struct {
+	Username    string `json:"username"`
+	Affiliation string `json:"affiliation"`
+	Country     string `json:"country"`
+	TeamID      int    `json:"team_id"`
+}
+
+// ChallengeResponse 定义获取题目的一个响应。
+type ChallengeResponse struct {
+	ID          int      `json:"id"`
+	Name        string   `json:"name"`
+	Score       int      `json:"score"`
+	Description string   `json:"description"` //题目描述
+	Attachment  []string `json:"attachment"`	//题目附件
+	Category    string   `json:"category"`	//分类
+	Tags        string   `json:"tags"`		//标签
+	Hints       []string `json:"hints"`		//提示
+	SolverCount int      `json:"solver_count"`	//解决人数
+	IsSolved    bool     `json:"is_solved"` // true：已解决，false：未解决
+}
+
+// ScoreRankResponse 定义获取当前用户分数和排名的一个响应。
+type ScoreRankResponse struct {
+	Score int `json:"score"`
+	Rank  int `json:"rank"`
+}
+
+// StudentsOrOthersInfoResponse 定义获取校内用户或校外用户信息的响应。
+type StudentsOrOthersInfoResponse struct {
+	Username  string `json:"username"`
+	IDOrEmail string `json:"id_email"`
+	QQ        string `json:"qq"`
+}