seaweedfs/weed/security/jwt.go

98 lines
2.6 KiB
Go

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
})
}