56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package security
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import (
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"errors"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// ParseUnverifiedJWT parses JWT and returns its claims
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// but DOES NOT verify the signature.
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//
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// It verifies only the exp, iat and nbf claims.
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func ParseUnverifiedJWT(token string) (jwt.MapClaims, error) {
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claims := jwt.MapClaims{}
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parser := &jwt.Parser{}
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_, _, err := parser.ParseUnverified(token, claims)
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if err == nil {
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err = jwt.NewValidator(jwt.WithIssuedAt()).Validate(claims)
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}
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return claims, err
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}
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// ParseJWT verifies and parses JWT and returns its claims.
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func ParseJWT(token string, verificationKey string) (jwt.MapClaims, error) {
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parser := jwt.NewParser(jwt.WithValidMethods([]string{"HS256"}))
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parsedToken, err := parser.Parse(token, func(t *jwt.Token) (any, error) {
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return []byte(verificationKey), nil
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})
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if err != nil {
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return nil, err
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}
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if claims, ok := parsedToken.Claims.(jwt.MapClaims); ok && parsedToken.Valid {
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return claims, nil
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}
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return nil, errors.New("unable to parse token")
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}
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// NewJWT generates and returns new HS256 signed JWT.
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func NewJWT(payload jwt.MapClaims, signingKey string, duration time.Duration) (string, error) {
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claims := jwt.MapClaims{
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"exp": time.Now().Add(duration).Unix(),
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}
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for k, v := range payload {
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claims[k] = v
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}
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return jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString([]byte(signingKey))
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}
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