AES_PDF: switch to pluggable crypto

1 files changed, 25 insertions, 0 deletions

diff --git a/libqpdf/qpdf/AES_PDF_native.hh b/libqpdf/qpdf/AES_PDF_native.hh
new file mode 100644
index 00000000..f663533b
--- /dev/null
+++ b/libqpdf/qpdf/AES_PDF_native.hh
@@ -0,0 +1,25 @@
+#ifndef AES_PDF_NATIVE_HH
+#define AES_PDF_NATIVE_HH
+
+#include <cstdint>
+#include <cstring>
+#include <memory>
+
+class AES_PDF_native
+{
+  public:
+    // key should be a pointer to key_bytes bytes of data
+    AES_PDF_native(bool encrypt, unsigned char const* key,
+                   size_t key_bytes);
+    ~AES_PDF_native();
+
+    void update(unsigned char* in_data, unsigned char* out_data);
+
+  private:
+    bool encrypt;
+    std::unique_ptr<unsigned char[]> key;
+    std::unique_ptr<uint32_t[]> rk;
+    unsigned int nrounds;
+};
+
+#endif // AES_PDF_NATIVE_HH