package security import ( "fmt" "net/http" "strings" "time" "github.com/golang-jwt/jwt" "github.com/seaweedfs/seaweedfs/weed/glog" ) type EncodedJwt string type SigningKey []byte // SeaweedFileIdClaims is created by Master server(s) and consumed by Volume server(s), // restricting the access this JWT allows to only a single file. type SeaweedFileIdClaims struct { Fid string `json:"fid"` jwt.StandardClaims } // SeaweedFilerClaims is created e.g. by S3 proxy server and consumed by Filer server. // Right now, it only contains the standard claims; but this might be extended later // for more fine-grained permissions. type SeaweedFilerClaims struct { jwt.StandardClaims } func GenJwtForVolumeServer(signingKey SigningKey, expiresAfterSec int, fileId string) EncodedJwt { if len(signingKey) == 0 { return "" } claims := SeaweedFileIdClaims{ fileId, jwt.StandardClaims{}, } if expiresAfterSec > 0 { claims.ExpiresAt = time.Now().Add(time.Second * time.Duration(expiresAfterSec)).Unix() } t := jwt.NewWithClaims(jwt.SigningMethodHS256, claims) encoded, e := t.SignedString([]byte(signingKey)) if e != nil { glog.V(0).Infof("Failed to sign claims %+v: %v", t.Claims, e) return "" } return EncodedJwt(encoded) } // GenJwtForFilerServer creates a JSON-web-token for using the authenticated Filer API. Used f.e. inside // the S3 API func GenJwtForFilerServer(signingKey SigningKey, expiresAfterSec int) EncodedJwt { if len(signingKey) == 0 { return "" } claims := SeaweedFilerClaims{ jwt.StandardClaims{}, } if expiresAfterSec > 0 { claims.ExpiresAt = time.Now().Add(time.Second * time.Duration(expiresAfterSec)).Unix() } t := jwt.NewWithClaims(jwt.SigningMethodHS256, claims) encoded, e := t.SignedString([]byte(signingKey)) if e != nil { glog.V(0).Infof("Failed to sign claims %+v: %v", t.Claims, e) return "" } return EncodedJwt(encoded) } func GetJwt(r *http.Request) EncodedJwt { // Get token from query params tokenStr := r.URL.Query().Get("jwt") // Get token from authorization header if tokenStr == "" { bearer := r.Header.Get("Authorization") if len(bearer) > 7 && strings.ToUpper(bearer[0:6]) == "BEARER" { tokenStr = bearer[7:] } } return EncodedJwt(tokenStr) } func DecodeJwt(signingKey SigningKey, tokenString EncodedJwt, claims jwt.Claims) (token *jwt.Token, err error) { // check exp, nbf return jwt.ParseWithClaims(string(tokenString), claims, func(token *jwt.Token) (interface{}, error) { if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok { return nil, fmt.Errorf("unknown token method") } return []byte(signingKey), nil }) }