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forgejo/services/actions/auth.go
ChristopherHX b058fb4012
Add ac claim for old docker/build-push-action@v3 / current buildx gha cache (#29584)
Also resolves a warning for current releases

```
| ##[group]GitHub Actions runtime token ACs
| ##[warning]Cannot parse GitHub Actions Runtime Token ACs: "undefined" is not valid JSON
| ##[endgroup]
====>
| ##[group]GitHub Actions runtime token ACs
| ##[endgroup]
```
\* this is an error in v3

References in the docker org:
-
831ca179d3/src/main.ts (L24)
-
7d8b4dc669/src/github.ts (L61)

No known official action of GitHub makes use of this claim.

Current releases throw an error when configure to use actions cache
```
| ERROR: failed to solve: failed to configure gha cache exporter: invalid token without access controls
| ##[error]buildx failed with: ERROR: failed to solve: failed to configure gha cache exporter: invalid token without access controls
```

(cherry picked from commit 368743baf3d904f86b553a88718583906f571c87)
2024-03-11 23:36:58 +07:00

102 lines
2.1 KiB
Go

// 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")
}
token, err := jwt.ParseWithClaims(parts[1], &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 := token.Claims.(*actionsClaims)
if !token.Valid || !ok {
return 0, fmt.Errorf("invalid token claim")
}
return c.TaskID, nil
}