67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
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package osutil
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import (
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"fmt"
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"io/fs"
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"os"
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)
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func IsWriteGroup(mode os.FileMode) bool {
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return mode&0o20 != 0
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}
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func IsWriteOther(mode os.FileMode) bool {
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return mode&0o02 != 0
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}
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func checkPathInfo(info fs.FileInfo, path string, uid int, permissions int) error {
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err := FileUidMatch(info, path, uid)
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if err != nil {
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return err
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}
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err = FilePermissionsMatch(info, path, permissions)
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if err != nil {
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return err
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}
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return nil
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}
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func FilePermissionsMatch(info fs.FileInfo, path string, permissions int) error {
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if permissions != 0 && int(info.Mode().Perm()) != permissions {
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return fmt.Errorf("path %q does not have permissions %o", path, permissions)
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}
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if permissions == 0 && (IsWriteOther(info.Mode()) || IsWriteGroup(info.Mode())) {
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return fmt.Errorf("path %q has insecure permissions %o. Vault expects no write permissions for group or others", path, info.Mode().Perm())
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}
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return nil
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}
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// OwnerPermissionsMatch checks if vault user is the owner and permissions are secure for input path
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func OwnerPermissionsMatch(path string, uid int, permissions int) error {
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if path == "" {
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return fmt.Errorf("could not verify permissions for path. No path provided ")
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}
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info, err := os.Stat(path)
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if err != nil {
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return fmt.Errorf("error stating %q: %w", path, err)
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}
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if info.Mode()&os.ModeSymlink != 0 {
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symLinkInfo, err := os.Lstat(path)
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if err != nil {
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return fmt.Errorf("error stating %q: %w", path, err)
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}
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err = checkPathInfo(symLinkInfo, path, uid, permissions)
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if err != nil {
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return err
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}
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}
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err = checkPathInfo(info, path, uid, permissions)
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if err != nil {
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return err
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}
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return nil
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}
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