45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package middleware
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import (
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"crypto/rand"
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"encoding/hex"
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"net/http"
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"metazone.cc/mce/internal/config"
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"github.com/gin-gonic/gin"
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)
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const csrfTokenLen = 32
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// SetCSRFToken 在首次页面访问时下发 CSRF Cookie（由页面路由中间件调用）
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func SetCSRFToken(c *gin.Context, cfg *config.Config) string {
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secure := cfg.Server.Mode != "debug"
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if existing, err := c.Cookie(csrfCookieName); err == nil && existing != "" {
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c.Set(csrfMetaName, existing)
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return existing
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}
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token, err := generateCSRFToken()
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if err != nil {
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token = "fallback-" + hex.EncodeToString([]byte("metazone"))
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}
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c.SetSameSite(http.SameSiteStrictMode)
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maxAge := cfg.Session.RememberTimeout * 60
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c.SetCookie(csrfCookieName, token, maxAge, "/", "", secure, false)
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c.Set(csrfMetaName, token)
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return token
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}
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// generateCSRFToken 生成 64 字符十六进制随机 CSRF token
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func generateCSRFToken() (string, error) {
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b := make([]byte, csrfTokenLen)
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if _, err := rand.Read(b); err != nil {
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return "", err
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}
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return hex.EncodeToString(b), nil
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}
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