--- /dev/null
+/**
+ * \file des.h
+ *
+ * \brief DES block cipher
+ *
+ * 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_DES_H
+#define POLARSSL_DES_H
+
+//#include "config.h"
+/**
+ * \def POLARSSL_CIPHER_MODE_CBC
+ *
+ * Enable Cipher Block Chaining mode (CBC) for symmetric ciphers.
+ */
+#define POLARSSL_CIPHER_MODE_CBC
+
+#include <string.h>
+
+#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
+#include <basetsd.h>
+typedef UINT32 uint32_t;
+#else
+#include <inttypes.h>
+#endif
+
+#define DES_ENCRYPT 1
+#define DES_DECRYPT 0
+
+#define POLARSSL_ERR_DES_INVALID_INPUT_LENGTH -0x0032 /**< The data input has an invalid length. */
+
+#define DES_KEY_SIZE 8
+
+#if !defined(POLARSSL_DES_ALT)
+// Regular implementation
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief DES context structure
+ */
+typedef struct
+{
+ int mode; /*!< encrypt/decrypt */
+ uint32_t sk[32]; /*!< DES subkeys */
+}
+des_context;
+
+/**
+ * \brief Triple-DES context structure
+ */
+typedef struct
+{
+ int mode; /*!< encrypt/decrypt */
+ uint32_t sk[96]; /*!< 3DES subkeys */
+}
+des3_context;
+/*
+ * Triple-DES key schedule (112-bit, encryption)
+ */
+int des3_set2key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] );
+
+/*
+ * Triple-DES key schedule (112-bit, decryption)
+ */
+int des3_set2key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] );
+
+/*
+ * Triple-DES key schedule (168-bit, encryption)
+ */
+int des3_set3key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] );
+
+/*
+ * Triple-DES key schedule (168-bit, decryption)
+ */
+int des3_set3key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] );
+
+/**
+ * \brief Set key parity on the given key to odd.
+ *
+ * DES keys are 56 bits long, but each byte is padded with
+ * a parity bit to allow verification.
+ *
+ * \param key 8-byte secret key
+ */
+void des_key_set_parity( unsigned char key[DES_KEY_SIZE] );
+
+/**
+ * \brief Check that key parity on the given key is odd.
+ *
+ * DES keys are 56 bits long, but each byte is padded with
+ * a parity bit to allow verification.
+ *
+ * \param key 8-byte secret key
+ *
+ * \return 0 is parity was ok, 1 if parity was not correct.
+ */
+int des_key_check_key_parity( const unsigned char key[DES_KEY_SIZE] );
+
+/**
+ * \brief Check that key is not a weak or semi-weak DES key
+ *
+ * \param key 8-byte secret key
+ *
+ * \return 0 if no weak key was found, 1 if a weak key was identified.
+ */
+int des_key_check_weak( const unsigned char key[DES_KEY_SIZE] );
+
+/**
+ * \brief DES key schedule (56-bit, encryption)
+ *
+ * \param ctx DES context to be initialized
+ * \param key 8-byte secret key
+ *
+ * \return 0
+ */
+int des_setkey_enc( des_context *ctx, const unsigned char key[DES_KEY_SIZE] );
+
+/**
+ * \brief DES key schedule (56-bit, decryption)
+ *
+ * \param ctx DES context to be initialized
+ * \param key 8-byte secret key
+ *
+ * \return 0
+ */
+int des_setkey_dec( des_context *ctx, const unsigned char key[DES_KEY_SIZE] );
+
+/**
+ * \brief Triple-DES key schedule (112-bit, encryption)
+ *
+ * \param ctx 3DES context to be initialized
+ * \param key 16-byte secret key
+ *
+ * \return 0
+ */
+int des3_set2key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] );
+
+/**
+ * \brief Triple-DES key schedule (112-bit, decryption)
+ *
+ * \param ctx 3DES context to be initialized
+ * \param key 16-byte secret key
+ *
+ * \return 0
+ */
+int des3_set2key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] );
+
+/**
+ * \brief Triple-DES key schedule (168-bit, encryption)
+ *
+ * \param ctx 3DES context to be initialized
+ * \param key 24-byte secret key
+ *
+ * \return 0
+ */
+int des3_set3key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] );
+
+/**
+ * \brief Triple-DES key schedule (168-bit, decryption)
+ *
+ * \param ctx 3DES context to be initialized
+ * \param key 24-byte secret key
+ *
+ * \return 0
+ */
+int des3_set3key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] );
+
+/**
+ * \brief DES-ECB block encryption/decryption
+ *
+ * \param ctx DES context
+ * \param input 64-bit input block
+ * \param output 64-bit output block
+ *
+ * \return 0 if successful
+ */
+int des_crypt_ecb( des_context *ctx,
+ const unsigned char input[8],
+ unsigned char output[8] );
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+/**
+ * \brief DES-CBC buffer encryption/decryption
+ *
+ * \param ctx DES context
+ * \param mode DES_ENCRYPT or DES_DECRYPT
+ * \param length length of the input data
+ * \param iv initialization vector (updated after use)
+ * \param input buffer holding the input data
+ * \param output buffer holding the output data
+ */
+int des_crypt_cbc( des_context *ctx,
+ int mode,
+ size_t length,
+ unsigned char iv[8],
+ const unsigned char *input,
+ unsigned char *output );
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+/**
+ * \brief 3DES-ECB block encryption/decryption
+ *
+ * \param ctx 3DES context
+ * \param input 64-bit input block
+ * \param output 64-bit output block
+ *
+ * \return 0 if successful
+ */
+int des3_crypt_ecb( des3_context *ctx,
+ const unsigned char input[8],
+ unsigned char output[8] );
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+/**
+ * \brief 3DES-CBC buffer encryption/decryption
+ *
+ * \param ctx 3DES context
+ * \param mode DES_ENCRYPT or DES_DECRYPT
+ * \param length length of the input data
+ * \param iv initialization vector (updated after use)
+ * \param input buffer holding the input data
+ * \param output buffer holding the output data
+ *
+ * \return 0 if successful, or POLARSSL_ERR_DES_INVALID_INPUT_LENGTH
+ */
+int des3_crypt_cbc( des3_context *ctx,
+ int mode,
+ size_t length,
+ unsigned char iv[8],
+ const unsigned char *input,
+ unsigned char *output );
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* POLARSSL_DES_ALT */
+#include "des_alt.h"
+#endif /* POLARSSL_DES_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int des_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* des.h */
projects / proxmark3-svn / blobdiff