62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"strconv"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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var secretKey = []byte("replace-with-env-variable")
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type UserClaims struct {
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Name string `json:"name"`
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Color [3]byte `json:"color"`
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jwt.RegisteredClaims
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}
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func GetToken(client *Client) (string, error) {
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token := jwt.NewWithClaims(jwt.SigningMethodHS256,
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UserClaims{
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Name: client.Name,
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Color: client.Color,
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RegisteredClaims: jwt.RegisteredClaims{
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Subject: strconv.Itoa(int(client.Id)),
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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},
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},
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)
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return token.SignedString(secretKey)
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}
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func SetClientFromToken(client *Client, tokenString string) error {
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token, err := jwt.ParseWithClaims(tokenString, &UserClaims{}, func(t *jwt.Token) (interface{}, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
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}
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return secretKey, nil
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})
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if err != nil {
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return err
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}
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claims, ok := token.Claims.(*UserClaims)
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if !ok || !token.Valid {
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return errors.New("invalid token")
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}
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id, err := strconv.ParseUint(claims.Subject, 10, 32)
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if err != nil {
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return fmt.Errorf("invalid subject: %w", err)
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}
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client.Id = uint32(id)
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client.Name = claims.Name
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client.Color = claims.Color
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return nil
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}
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