gitea/services/oauth2_provider/token.go

94 lines
3.0 KiB
Go

// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package oauth2_provider //nolint
import (
"fmt"
"time"
"code.gitea.io/gitea/modules/timeutil"
"github.com/golang-jwt/jwt/v5"
)
// Token represents an Oauth grant
// TokenKind represents the type of token for an oauth application
type TokenKind int
const (
// KindAccessToken is a token with short lifetime to access the api
KindAccessToken TokenKind = 0
// KindRefreshToken is token with long lifetime to refresh access tokens obtained by the client
KindRefreshToken = iota
)
// Token represents a JWT token used to authenticate a client
type Token struct {
GrantID int64 `json:"gnt"`
Kind TokenKind `json:"tt"`
Counter int64 `json:"cnt,omitempty"`
jwt.RegisteredClaims
}
// ParseToken parses a signed jwt string
func ParseToken(jwtToken string, signingKey JWTSigningKey) (*Token, error) {
parsedToken, err := jwt.ParseWithClaims(jwtToken, &Token{}, func(token *jwt.Token) (any, error) {
if token.Method == nil || token.Method.Alg() != signingKey.SigningMethod().Alg() {
return nil, fmt.Errorf("unexpected signing algo: %v", token.Header["alg"])
}
return signingKey.VerifyKey(), nil
})
if err != nil {
return nil, err
}
if !parsedToken.Valid {
return nil, fmt.Errorf("invalid token")
}
var token *Token
var ok bool
if token, ok = parsedToken.Claims.(*Token); !ok || !parsedToken.Valid {
return nil, fmt.Errorf("invalid token")
}
return token, nil
}
// SignToken signs the token with the JWT secret
func (token *Token) SignToken(signingKey JWTSigningKey) (string, error) {
token.IssuedAt = jwt.NewNumericDate(time.Now())
jwtToken := jwt.NewWithClaims(signingKey.SigningMethod(), token)
signingKey.PreProcessToken(jwtToken)
return jwtToken.SignedString(signingKey.SignKey())
}
// OIDCToken represents an OpenID Connect id_token
type OIDCToken struct {
jwt.RegisteredClaims
Nonce string `json:"nonce,omitempty"`
// Scope profile
Name string `json:"name,omitempty"`
PreferredUsername string `json:"preferred_username,omitempty"`
Profile string `json:"profile,omitempty"`
Picture string `json:"picture,omitempty"`
Website string `json:"website,omitempty"`
Locale string `json:"locale,omitempty"`
UpdatedAt timeutil.TimeStamp `json:"updated_at,omitempty"`
// Scope email
Email string `json:"email,omitempty"`
EmailVerified bool `json:"email_verified,omitempty"`
// Groups are generated by organization and team names
Groups []string `json:"groups,omitempty"`
}
// SignToken signs an id_token with the (symmetric) client secret key
func (token *OIDCToken) SignToken(signingKey JWTSigningKey) (string, error) {
token.IssuedAt = jwt.NewNumericDate(time.Now())
jwtToken := jwt.NewWithClaims(signingKey.SigningMethod(), token)
signingKey.PreProcessToken(jwtToken)
return jwtToken.SignedString(signingKey.SignKey())
}