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// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package actions
import (
"fmt"
"net/http"
"strings"
"time"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/golang-jwt/jwt/v5"
)
type actionsClaims struct {
jwt.RegisteredClaims
Scp string `json:"scp"`
TaskID int64
RunID int64
JobID int64
Ac string `json:"ac"`
}
type actionsCacheScope struct {
Scope string
Permission actionsCachePermission
}
type actionsCachePermission int
const (
actionsCachePermissionRead = 1 << iota
actionsCachePermissionWrite
)
func CreateAuthorizationToken(taskID, runID, jobID int64) (string, error) {
now := time.Now()
ac, err := json.Marshal(&[]actionsCacheScope{
{
Scope: "",
Permission: actionsCachePermissionWrite,
},
})
if err != nil {
return "", err
}
claims := actionsClaims{
RegisteredClaims: jwt.RegisteredClaims{
ExpiresAt: jwt.NewNumericDate(now.Add(24 * time.Hour)),
NotBefore: jwt.NewNumericDate(now),
},
Scp: fmt.Sprintf("Actions.Results:%d:%d", runID, jobID),
Ac: string(ac),
TaskID: taskID,
RunID: runID,
JobID: jobID,
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
tokenString, err := token.SignedString(setting.GetGeneralTokenSigningSecret())
if err != nil {
return "", err
}
return tokenString, nil
}
func ParseAuthorizationToken(req *http.Request) (int64, error) {
h := req.Header.Get("Authorization")
if h == "" {
return 0, nil
}
parts := strings.SplitN(h, " ", 2)
if len(parts) != 2 {
log.Error("split token failed: %s", h)
return 0, fmt.Errorf("split token failed")
}
return TokenToTaskID(parts[1])
}
// TokenToTaskID returns the TaskID associated with the provided JWT token
func TokenToTaskID(token string) (int64, error) {
parsedToken, err := jwt.ParseWithClaims(token, &actionsClaims{}, func(t *jwt.Token) (any, error) {
if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
}
return setting.GetGeneralTokenSigningSecret(), nil
})
if err != nil {
return 0, err
}
c, ok := parsedToken.Claims.(*actionsClaims)
if !parsedToken.Valid || !ok {
return 0, fmt.Errorf("invalid token claim")
}
return c.TaskID, nil
}
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