4.44 beta

CPP/7zip/Crypto/AES/AES_CBC.h

@@ -0,0 +1,39 @@
+// AES_CBC.h
+
+#ifndef __AES_CBC_H
+#define __AES_CBC_H
+
+#include "aescpp.h"
+
+class CAES_CBC: public AESclass
+{
+protected:
+  Byte _prevBlock[16];
+public:
+  void Init(const Byte *iv)
+  {
+    for (int i = 0; i < 16; i++)
+      _prevBlock[i] = iv[i];
+  }
+  void Encode(const Byte *inBlock, Byte *outBlock)
+  {
+    int i;
+    for (i = 0; i < 16; i++)
+      _prevBlock[i] ^= inBlock[i];
+    enc_blk(_prevBlock, outBlock);
+    for (i = 0; i < 16; i++)
+      _prevBlock[i] = outBlock[i];
+  }
+
+  void Decode(const Byte *inBlock, Byte *outBlock)
+  {
+    dec_blk(inBlock, outBlock);
+    int i;
+    for (i = 0; i < 16; i++)
+      outBlock[i] ^= _prevBlock[i];
+    for (i = 0; i < 16; i++)
+      _prevBlock[i] = inBlock[i];
+  }
+};
+
+#endif