4.44 beta

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

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+/*
+ -------------------------------------------------------------------------
+ Copyright (c) 2001, Dr Brian Gladman <brg@gladman.me.uk>, Worcester, UK.
+ All rights reserved.
+
+ LICENSE TERMS
+
+ The free distribution and use of this software in both source and binary 
+ form is allowed (with or without changes) provided that:
+
+   1. distributions of this source code include the above copyright 
+      notice, this list of conditions and the following disclaimer;
+
+   2. distributions in binary form include the above copyright
+      notice, this list of conditions and the following disclaimer
+      in the documentation and/or other associated materials;
+
+   3. the copyright holder's name is not used to endorse products 
+      built using this software without specific written permission. 
+
+ DISCLAIMER
+
+ This software is provided 'as is' with no explicit or implied warranties
+ in respect of its properties, including, but not limited to, correctness 
+ and fitness for purpose.
+ -------------------------------------------------------------------------
+ Issue Date: 29/07/2002
+
+ This file contains the definitions required to use AES (Rijndael) in C.
+*/
+
+#ifndef _AES_H
+#define _AES_H
+
+/*  This include is used only to find 8 and 32 bit unsigned integer types   */
+
+#include "limits.h"
+
+#if UCHAR_MAX == 0xff       /* an unsigned 8 bit type for internal AES use  */
+  typedef unsigned char      aes_08t;
+#else
+#error Please define an unsigned 8 bit type in aes.h
+#endif
+
+#if UINT_MAX == 0xffffffff  /* an unsigned 32 bit type for internal AES use */
+  typedef   unsigned int     aes_32t;
+#elif ULONG_MAX == 0xffffffff
+  typedef   unsigned long    aes_32t;
+#else
+#error Please define an unsigned 32 bit type in aes.h
+#endif
+
+/*  BLOCK_SIZE is in BYTES: 16, 24, 32 or undefined for aes.c and 16, 20, 
+    24, 28, 32 or undefined for aespp.c.  When left undefined a slower 
+    version that provides variable block length is compiled.    
+*/
+
+#define BLOCK_SIZE  16
+
+/* key schedule length (in 32-bit words)    */
+
+#if !defined(BLOCK_SIZE)
+#define KS_LENGTH   128
+#else
+#define KS_LENGTH   4 * BLOCK_SIZE
+#endif
+
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+typedef unsigned int aes_fret;   /* type for function return value       */
+#define aes_bad      0           /* bad function return value            */
+#define aes_good     1           /* good function return value           */
+#ifndef AES_DLL                  /* implement normal or DLL functions    */
+#define aes_rval     aes_fret
+#else
+#define aes_rval     aes_fret __declspec(dllexport) _stdcall
+#endif
+
+
+typedef struct                     /* the AES context for encryption   */
+{   aes_32t    k_sch[KS_LENGTH];   /* the encryption key schedule      */
+    aes_32t    n_rnd;              /* the number of cipher rounds      */
+    aes_32t    n_blk;              /* the number of bytes in the state */
+} aes_ctx;
+
+#if !defined(BLOCK_SIZE)
+aes_rval aes_blk_len(unsigned int blen, aes_ctx cx[1]);
+#endif
+
+aes_rval aes_enc_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
+aes_rval aes_enc_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
+
+aes_rval aes_dec_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
+aes_rval aes_dec_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif