71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package auth
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import (
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"errors"
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"fmt"
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"log"
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"os"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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func getJwtKey() []byte {
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jwtKey, ok := os.LookupEnv("SECRET_API_KEY")
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if !ok || jwtKey == "" {
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return []byte("supersecretkey")
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}
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return []byte(jwtKey)
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}
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type JWTClaim struct {
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Username string `json:"username"`
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Email string `json:"email"`
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jwt.RegisteredClaims
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}
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func GenerateJWT(email string, username string) (tokenString string, err error) {
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expirationTime := time.Now().Add(4 * time.Hour)
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claims := &JWTClaim{
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username,
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email,
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jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(expirationTime),
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Issuer: "Oktopus",
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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tokenString, err = token.SignedString(getJwtKey())
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return
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}
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func ValidateToken(signedToken string) (email string, err error) {
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token, err := jwt.ParseWithClaims(
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signedToken,
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&JWTClaim{},
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func(token *jwt.Token) (interface{}, error) {
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// Don't forget to validate the alg is what you expect:
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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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// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
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return getJwtKey(), nil
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},
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)
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if err != nil {
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log.Println(err)
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return
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}
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claims, ok := token.Claims.(*JWTClaim)
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if !ok {
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err = errors.New("couldn't parse claims")
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return
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}
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email = claims.Email
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return
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}
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