116 lines
2.6 KiB
Go
116 lines
2.6 KiB
Go
package auth
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import (
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"fmt"
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"os"
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"strings"
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"gitea.d3m0k1d.ru/d3m0k1d/d3m0k1d.ru/backend/internal/storage"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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)
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var jwtSecret = []byte(os.Getenv("JWT_SECRET"))
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func GenerateJWT(user storage.User) (string, error) {
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token := jwt.NewWithClaims(jwt.SigningMethodHS512, jwt.MapClaims{
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"id": user.ID,
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"email": user.Email,
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"login": user.GithubLogin,
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"github_id": user.GithubID,
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})
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tokenString, err := token.SignedString(jwtSecret)
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if err != nil {
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return "", err
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}
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return tokenString, nil
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}
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func JWTMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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auth := c.GetHeader("Authorization")
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if !strings.HasPrefix(auth, "Bearer ") {
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c.AbortWithStatusJSON(401, gin.H{"error": "Bearer required"})
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return
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}
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tokenString := strings.TrimPrefix(auth, "Bearer ")
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token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return jwtSecret, nil
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})
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if err != nil || !token.Valid {
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c.AbortWithStatusJSON(401, gin.H{"error": "invalid token"})
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return
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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if !ok {
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c.AbortWithStatusJSON(401, gin.H{"error": "invalid claims"})
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return
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}
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idValue, idExists := claims["id"]
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if !idExists {
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c.AbortWithStatusJSON(401, gin.H{"error": "missing id in token"})
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return
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}
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idFloat, ok := idValue.(float64)
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if !ok {
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c.AbortWithStatusJSON(401, gin.H{"error": "invalid id type in token"})
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return
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}
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githubIDValue, githubExists := claims["github_id"]
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if !githubExists {
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c.AbortWithStatusJSON(401, gin.H{"error": "missing github_id in token"})
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return
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}
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githubIDFloat, ok := githubIDValue.(float64)
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if !ok {
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c.AbortWithStatusJSON(401, gin.H{"error": "invalid github_id type in token"})
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return
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}
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loginValue, loginExists := claims["login"]
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if !loginExists {
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c.AbortWithStatusJSON(401, gin.H{"error": "missing login in token"})
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return
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}
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login, ok := loginValue.(string)
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if !ok {
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c.AbortWithStatusJSON(401, gin.H{"error": "invalid login type in token"})
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return
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}
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c.Set("user_id", int(idFloat))
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c.Set("github_id", int(githubIDFloat))
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c.Set("login", login)
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c.Next()
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}
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}
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func RequireAdmin() gin.HandlerFunc {
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return func(c *gin.Context) {
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githubID, exists := c.Get("github_id")
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if !exists {
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c.AbortWithStatusJSON(401, gin.H{"error": "unauthorized"})
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return
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}
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id := githubID.(int)
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if id != 173489813 {
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c.AbortWithStatusJSON(403, gin.H{"error": "access denied"})
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return
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}
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c.Next()
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}
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}
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