makerom v0.1

2026-07-06 00:39:11 +00:00 · 2014-02-16 16:55:00 +08:00
commit 0155b2098e
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+/**
+ * \file xtea.h
+ *
+ * \brief XTEA block cipher (32-bit)
+ *
+ *  Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_XTEA_H
+#define POLARSSL_XTEA_H
+
+#include "polarssl/config.h"
+
+#include <string.h>
+
+#ifdef _MSC_VER
+#include <basetsd.h>
+typedef UINT32 uint32_t;
+#else
+#include <inttypes.h>
+#endif
+
+#define XTEA_ENCRYPT     1
+#define XTEA_DECRYPT     0
+
+#define POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH             -0x0028  /**< The data input has an invalid length. */
+
+#if !defined(POLARSSL_XTEA_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief          XTEA context structure
+ */
+typedef struct
+{
+    uint32_t k[4];       /*!< key */
+}
+xtea_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          XTEA key schedule
+ *
+ * \param ctx      XTEA context to be initialized
+ * \param key      the secret key
+ */
+void xtea_setup( xtea_context *ctx, unsigned char key[16] );
+
+/**
+ * \brief          XTEA cipher function
+ *
+ * \param ctx      XTEA context
+ * \param mode     XTEA_ENCRYPT or XTEA_DECRYPT
+ * \param input    8-byte input block
+ * \param output   8-byte output block
+ *
+ * \return         0 if successful
+ */
+int xtea_crypt_ecb( xtea_context *ctx,
+                    int mode,
+                    unsigned char input[8],
+                    unsigned char output[8] );
+
+/**
+ * \brief          XTEA CBC cipher function
+ *
+ * \param ctx      XTEA context
+ * \param mode     XTEA_ENCRYPT or XTEA_DECRYPT
+ * \param length   the length of input, multiple of 8
+ * \param iv       initialization vector for CBC mode
+ * \param input    input block
+ * \param output   output block
+ *
+ * \return         0 if successful,
+ *                 POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
+ */
+int xtea_crypt_cbc( xtea_context *ctx,
+                    int mode,
+                    size_t length,
+                    unsigned char iv[8],
+                    unsigned char *input,
+                    unsigned char *output);
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_XTEA_ALT */
+#include "polarssl/xtea_alt.h"
+#endif /* POLARSSL_XTEA_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          Checkup routine
+ *
+ * \return         0 if successful, or 1 if the test failed
+ */
+int xtea_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* xtea.h */