Synched with Xpdf 0.92

this adds "decryption" support
testing this code after six weeks immediately gives me segfaults (image drawing) :-O
must have fixed that later without knowing :-O

1 files changed, 49 insertions, 0 deletions

diff --git a/pdf/xpdf/Decrypt.h b/pdf/xpdf/Decrypt.h
new file mode 100644
index 0000000..3ea4374
--- /dev/null
+++ b/pdf/xpdf/Decrypt.h
@@ -0,0 +1,49 @@
+//========================================================================
+//
+// Decrypt.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef DECRYPT_H
+#define DECRYPT_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "gtypes.h"
+#include "GString.h"
+
+//------------------------------------------------------------------------
+// Decrypt
+//------------------------------------------------------------------------
+
+class Decrypt {
+public:
+
+  // Initialize the decryptor object.
+  Decrypt(Guchar *fileKey, int objNum, int objGen);
+
+  // Reset decryption.
+  void reset();
+
+  // Decrypt one byte.
+  Guchar decryptByte(Guchar c);
+
+  // Generate a file key.  The <fileKey> buffer must have space for
+  // at least 16 bytes.  Checks user key and returns gTrue if okay.
+  // <userPassword> may be NULL.
+  static GBool makeFileKey(GString *ownerKey, GString *userKey,
+			   int permissions, GString *fileID,
+			   GString *userPassword, Guchar *fileKey);
+
+private:
+
+  Guchar objKey[16];
+  Guchar state[256];
+  Guchar x, y;
+};
+
+#endif