129 lines
3.1 KiB
Go
129 lines
3.1 KiB
Go
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/domain"
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"github.com/golang-jwt/jwt/v5"
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"github.com/labstack/echo/v4"
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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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ErrJwtInvalidIssuer = "incorrect server issued the token"
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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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UserId int64 `json:"userId"`
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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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// Check to see if they have the scope to do anything
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// if they do, let them pass
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err = j.hasScope(domain.ScopeAll)
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if err == nil {
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return nil
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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) GetUserId() int64 {
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return j.UserId
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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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hasExpired := time.Now().Compare(j.Exp)
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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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// This will check the users token to make sure they have the correct scope to access the handler.
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// It will evaluate if you have the admin scope or the required scope for the handler.
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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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userScopes := strings.Join(j.Scopes, "")
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if strings.Contains(domain.ScopeAll, userScopes) {
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return nil
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}
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if strings.Contains(userScopes, scope) {
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return nil
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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, userScopes []string, userId int64) (string, error) {
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return h.generateJwtWithExp(username, issuer, userScopes, userId, time.Now().Add(10*time.Minute))
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}
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func (h *Handler) generateJwtWithExp(username, issuer string, userScopes []string, userId int64, 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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claims["userId"] = userId
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var scopes []string
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scopes = append(scopes, userScopes...)
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claims["scopes"] = scopes
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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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func (h *Handler) getJwtTokenFromContext(c echo.Context) (JwtToken, error) {
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// Make sure that the request came with a jwtToken
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token, ok := c.Get("user").(*jwt.Token)
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if !ok {
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return JwtToken{}, errors.New(ErrJwtMissing)
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}
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// Generate the claims from the token
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claims, ok := token.Claims.(*JwtToken)
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if !ok {
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return JwtToken{}, errors.New(ErrJwtClaimsMissing)
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}
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return *claims, nil
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}
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