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session.go
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session.go
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package handlers
import (
"context"
"encoding/base64"
"net/http"
"strings"
"time"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/handlers/types"
"github.com/replicatedhq/kots/pkg/k8sutil"
"github.com/replicatedhq/kots/pkg/logger"
"github.com/replicatedhq/kots/pkg/session"
sessiontypes "github.com/replicatedhq/kots/pkg/session/types"
"github.com/replicatedhq/kots/pkg/store"
"github.com/replicatedhq/kots/pkg/util"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type authorization struct {
Username string
Password string
}
func parseClusterAuthorization(authHeader string) (authorization, error) {
if !strings.HasPrefix(authHeader, "Basic ") { // does this need "Kots " too?
return authorization{}, errors.New("only basic auth is supported")
}
authHeader = strings.TrimSpace(strings.TrimPrefix(authHeader, "Basic "))
data, err := base64.StdEncoding.DecodeString(authHeader)
if err != nil {
return authorization{}, errors.Wrap(err, "failed ot base64 decode auth header")
}
parts := strings.SplitN(string(data), ":", 2)
if len(parts) != 2 {
return authorization{}, errors.Errorf("expected 2 parts in auth header, found %d", len(parts))
}
return authorization{
Username: parts[0],
Password: parts[1],
}, nil
}
func requireValidSession(kotsStore store.Store, w http.ResponseWriter, r *http.Request) (*sessiontypes.Session, error) {
if r.Method == "OPTIONS" {
return nil, nil
}
auth := r.Header.Get("authorization")
var signedTokenCookie *http.Cookie
if auth == "" {
signedTokenCookie, err := r.Cookie("signed-token")
if err == http.ErrNoCookie && auth == "" {
err := errors.New("missing authorization token")
response := types.ErrorResponse{Error: util.StrPointer(err.Error())}
JSON(w, http.StatusUnauthorized, response)
return nil, err
}
auth = signedTokenCookie.Value
}
sess, err := session.Parse(kotsStore, auth)
if err != nil {
response := types.ErrorResponse{Error: util.StrPointer("failed to parse authorization header")}
JSON(w, http.StatusUnauthorized, response)
return nil, errors.Wrap(err, "invalid session")
}
// we don't currently have roles, all valid tokens are valid sessions
if sess == nil || sess.ID == "" {
err := errors.New("no session in auth header")
response := types.ErrorResponse{Error: util.StrPointer(err.Error())}
JSON(w, http.StatusUnauthorized, response)
return nil, err
}
if time.Now().After(sess.ExpiresAt) {
if err := kotsStore.DeleteSession(sess.ID); err != nil {
logger.Error(errors.Wrapf(err, "session expired. failed to delete expired session %s", sess.ID))
}
err := errors.New("session expired")
response := types.ErrorResponse{Error: util.StrPointer(err.Error())}
JSON(w, http.StatusUnauthorized, response)
return nil, err
}
passwordUpdatedAt, err := kotsStore.GetPasswordUpdatedAt()
if err != nil {
response := types.ErrorResponse{Error: util.StrPointer("failed to validate session with current password")}
JSON(w, http.StatusUnauthorized, response)
return nil, err
}
if passwordUpdatedAt != nil && passwordUpdatedAt.After(sess.IssuedAt) {
if err := kotsStore.DeleteSession(sess.ID); err != nil {
logger.Error(errors.Wrapf(err, "password was updated after session created. failed to delete invalid session %s", sess.ID))
}
err := errors.New("password changed, please login again")
response := types.ErrorResponse{Error: util.StrPointer(err.Error())}
JSON(w, http.StatusUnauthorized, response)
return nil, err
}
// give the user the full session timeout if they have been active at least an hour
if time.Now().Add(SessionTimeout - time.Hour).After(sess.ExpiresAt) {
sess.ExpiresAt = time.Now().Add(SessionTimeout)
if err := kotsStore.UpdateSessionExpiresAt(sess.ID, sess.ExpiresAt); err != nil {
logger.Error(errors.Wrapf(err, "failed to update session expiry %s", sess.ID))
}
if signedTokenCookie != nil {
origin := r.Header.Get("Origin")
expiration := sess.ExpiresAt
tokenCookie, err := session.GetSessionCookie(auth, expiration, origin)
if err != nil {
logger.Error(errors.Wrapf(err, "failed to update session cookie expiry %s", sess.ID))
} else {
http.SetCookie(w, tokenCookie)
}
}
}
return sess, nil
}
func requireValidKOTSToken(w http.ResponseWriter, r *http.Request) error {
if r.Header.Get("Authorization") == "" {
w.WriteHeader(http.StatusUnauthorized)
return errors.New("authorization header empty")
}
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get clientset")
}
secret, err := clientset.CoreV1().Secrets(util.PodNamespace).Get(context.TODO(), "kotsadm-authstring", metav1.GetOptions{})
if kuberneteserrors.IsNotFound(err) {
return errors.New("no authstring found in cluster")
}
if err != nil {
return errors.Wrap(err, "failed to read auth string")
}
if r.Header.Get("Authorization") == string(secret.Data["kotsadm-authstring"]) {
return nil
}
return errors.New("invalid auth")
}