100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
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package v1
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import (
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"errors"
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"strings"
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"time"
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"git.jamestombleson.com/jtom38/newsbot-api/internal/domain"
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"github.com/golang-jwt/jwt/v5"
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)
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const (
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ErrJwtMissing = "auth token is missing"
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ErrJwtClaimsMissing = "claims missing on token"
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ErrJwtExpired = "auth token has expired"
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ErrJwtScopeMissing = "required scope is missing"
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)
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type JwtToken struct {
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Exp time.Time `json:"exp"`
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Iss string `json:"iss"`
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Authorized bool `json:"authorized"`
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UserName string `json:"username"`
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Scopes []string `json:"scopes"`
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jwt.RegisteredClaims
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}
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func (j JwtToken) IsValid(scope string) error {
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err := j.hasExpired()
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if err != nil {
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return err
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}
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err = j.hasScope(scope)
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if err != nil {
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return err
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}
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return nil
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}
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func (j JwtToken) GetUsername() string {
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return j.UserName
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}
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func (j JwtToken) hasExpired() error {
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// Check to see if the token has expired
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hasExpired := j.Exp.Compare(time.Now())
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if hasExpired == -1 {
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return errors.New(ErrJwtExpired)
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}
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return nil
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}
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func (j JwtToken) hasScope(scope string) error {
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// they have the scope to access everything, so let them pass.
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if strings.Contains(domain.ScopeAll, scope) {
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return nil
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}
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for _, s := range j.Scopes {
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if strings.Contains(s, scope) {
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return nil
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}
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}
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return errors.New(ErrJwtScopeMissing)
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}
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func (h *Handler) generateJwt(username, issuer string) (string, error) {
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return h.generateJwtWithExp(username, issuer, time.Now().Add(10*time.Minute))
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}
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func (h *Handler) generateJwtWithExp(username, issuer string, expiresAt time.Time) (string, error) {
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secret := []byte(h.config.JwtSecret)
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// Anyone who wants to decrypt the key needs to use the same method
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token := jwt.New(jwt.SigningMethodHS256)
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claims := token.Claims.(jwt.MapClaims)
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claims["exp"] = expiresAt
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claims["authorized"] = true
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claims["username"] = username
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claims["iss"] = issuer
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var scopes []string
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if username == "admin" {
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scopes = append(scopes, domain.ScopeAll)
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claims["scopes"] = scopes
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} else {
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scopes = append(scopes, domain.ScopeRead)
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claims["scopes"] = scopes
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}
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tokenString, err := token.SignedString(secret)
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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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