Initial commit (code only without large binaries)

EdgeAdmin/internal/csrf/token_manager.go

@@ -0,0 +1,58 @@
+package csrf
+
+import (
+	"sync"
+	"time"
+)
+
+var sharedTokenManager = NewTokenManager()
+
+func init() {
+	go func() {
+		ticker := time.NewTicker(1 * time.Hour)
+		for range ticker.C {
+			sharedTokenManager.Clean()
+		}
+	}()
+}
+
+type TokenManager struct {
+	tokenMap map[string]int64 // token => timestamp
+
+	locker sync.Mutex
+}
+
+func NewTokenManager() *TokenManager {
+	return &TokenManager{
+		tokenMap: map[string]int64{},
+	}
+}
+
+func (this *TokenManager) Put(token string) {
+	this.locker.Lock()
+	this.tokenMap[token] = time.Now().Unix()
+	this.locker.Unlock()
+}
+
+func (this *TokenManager) Exists(token string) bool {
+	this.locker.Lock()
+	_, ok := this.tokenMap[token]
+	this.locker.Unlock()
+	return ok
+}
+
+func (this *TokenManager) Delete(token string) {
+	this.locker.Lock()
+	delete(this.tokenMap, token)
+	this.locker.Unlock()
+}
+
+func (this *TokenManager) Clean() {
+	this.locker.Lock()
+	for token, timestamp := range this.tokenMap {
+		if time.Now().Unix()-timestamp > 3600 { // 删除一个小时前的
+			delete(this.tokenMap, token)
+		}
+	}
+	this.locker.Unlock()
+}

EdgeAdmin/internal/csrf/utils.go

@@ -0,0 +1,66 @@
+package csrf
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+	"github.com/TeaOSLab/EdgeAdmin/internal/configs"
+	"github.com/iwind/TeaGo/types"
+	"strconv"
+	"time"
+)
+
+// Generate 生成Token
+func Generate() string {
+	timestamp := strconv.FormatInt(time.Now().Unix(), 10)
+
+	h := sha256.New()
+	h.Write([]byte(configs.Secret))
+	h.Write([]byte(timestamp))
+	s := h.Sum(nil)
+	token := base64.StdEncoding.EncodeToString([]byte(timestamp + fmt.Sprintf("%x", s)))
+	sharedTokenManager.Put(token)
+	return token
+}
+
+// Validate 校验Token
+func Validate(token string) (b bool) {
+	if len(token) == 0 {
+		return
+	}
+
+	if !sharedTokenManager.Exists(token) {
+		return
+	}
+	defer func() {
+		sharedTokenManager.Delete(token)
+	}()
+
+	data, err := base64.StdEncoding.DecodeString(token)
+	if err != nil {
+		return
+	}
+
+	hashString := string(data)
+	if len(hashString) < 10+32 {
+		return
+	}
+
+	timestampString := hashString[:10]
+	hashString = hashString[10:]
+
+	h := sha256.New()
+	h.Write([]byte(configs.Secret))
+	h.Write([]byte(timestampString))
+	hashData := h.Sum(nil)
+	if hashString != fmt.Sprintf("%x", hashData) {
+		return
+	}
+
+	timestamp := types.Int64(timestampString)
+	if timestamp < time.Now().Unix()-1800 { // 有效期半个小时
+		return
+	}
+
+	return true
+}