1 files changed, 120 insertions, 0 deletions
diff --git a/old/botan/src/modes/mode_pad/mode_pad.h b/old/botan/src/modes/mode_pad/mode_pad.h
new file mode 100644
index 0000000..a486d3c
--- /dev/null
+++ b/old/botan/src/modes/mode_pad/mode_pad.h
@@ -0,0 +1,120 @@
+/**
+* CBC Padding Methods
+* (C) 1999-2008 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CBC_PADDING_H__
+#define BOTAN_CBC_PADDING_H__
+
+#include <botan/types.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* Block Cipher Mode Padding Method
+* This class is pretty limited, it cannot deal well with
+* randomized padding methods, or any padding method that
+* wants to add more than one block. For instance, it should
+* be possible to define cipher text stealing mode as simply
+* a padding mode for CBC, which happens to consume the last
+* two block (and requires use of the block cipher).
+*/
+class BOTAN_DLL BlockCipherModePaddingMethod
+   {
+   public:
+      /**
+      * @param block output buffer
+      * @param size of the block
+      * @param current_position in the last block
+      */
+      virtual void pad(byte block[],
+                       u32bit size,
+                       u32bit current_position) const = 0;
+
+      /**
+      * @param block the last block
+      * @param size the of the block
+      */
+      virtual u32bit unpad(const byte block[],
+                           u32bit size) const = 0;
+
+      /**
+      * @param block_size of the cipher
+      * @param position in the current block
+      * @return number of padding bytes that will be appended
+      */
+      virtual u32bit pad_bytes(u32bit block_size,
+                               u32bit position) const;
+
+      /**
+      * @param block_size of the cipher
+      * @return valid block size for this padding mode
+      */
+      virtual bool valid_blocksize(u32bit block_size) const = 0;
+
+      /**
+      * @return name of the mode
+      */
+      virtual std::string name() const = 0;
+
+      /**
+      * virtual destructor
+      */
+      virtual ~BlockCipherModePaddingMethod() {}
+   };
+
+/**
+* PKCS#7 Padding
+*/
+class BOTAN_DLL PKCS7_Padding : public BlockCipherModePaddingMethod
+   {
+   public:
+      void pad(byte[], u32bit, u32bit) const;
+      u32bit unpad(const byte[], u32bit) const;
+      bool valid_blocksize(u32bit) const;
+      std::string name() const { return "PKCS7"; }
+   };
+
+/**
+* ANSI X9.23 Padding
+*/
+class BOTAN_DLL ANSI_X923_Padding : public BlockCipherModePaddingMethod
+   {
+   public:
+      void pad(byte[], u32bit, u32bit) const;
+      u32bit unpad(const byte[], u32bit) const;
+      bool valid_blocksize(u32bit) const;
+      std::string name() const { return "X9.23"; }
+   };
+
+/**
+* One And Zeros Padding
+*/
+class BOTAN_DLL OneAndZeros_Padding : public BlockCipherModePaddingMethod
+   {
+   public:
+      void pad(byte[], u32bit, u32bit) const;
+      u32bit unpad(const byte[], u32bit) const;
+      bool valid_blocksize(u32bit) const;
+      std::string name() const { return "OneAndZeros"; }
+   };
+
+/**
+* Null Padding
+*/
+class BOTAN_DLL Null_Padding : public BlockCipherModePaddingMethod
+   {
+   public:
+      void pad(byte[], u32bit, u32bit) const { return; }
+      u32bit unpad(const byte[], u32bit size) const { return size; }
+      u32bit pad_bytes(u32bit, u32bit) const { return 0; }
+      bool valid_blocksize(u32bit) const { return true; }
+      std::string name() const { return "NoPadding"; }
+   };
+
+}
+
+#endif