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-rw-r--r--include/qpdf/QPDF.hh5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/qpdf/QPDF.hh b/include/qpdf/QPDF.hh
index 08f82efb..1a5ed649 100644
--- a/include/qpdf/QPDF.hh
+++ b/include/qpdf/QPDF.hh
@@ -39,7 +39,10 @@ class QPDF
// lifetime. This method must be called before any methods that
// potentially ask for information about the PDF file are called.
// Prior to calling this, the only methods that are allowed are
- // those that set parameters.
+ // those that set parameters. If the input file is not
+ // encrypted,either a null password or an empty password can be
+ // used. If the file is encrypted, either the user password or
+ // the owner password may be supplied.
DLL_EXPORT
void processFile(char const* filename, char const* password = 0);