转载自： http://www.cnblogs.com/WonKerr/archive/2009/11/11/DES_C_JAVA.html
自己实现了一下，从csdn上下了一个大神从openssl里扣出来的C语言DES库和java的des库，能实现java和C对接：
java代码：
import java.security.Key;
import java.security.Security;
import javax.crypto.Cipher;
public class DESPlus
{
static String strDefaultKey = "initkey";
static Cipher encryptCipher = null;
static Cipher decryptCipher = null;
static {
Security.addProvider(new com.sun.crypto.provider.SunJCE());
Key key = null;
try {
key = getKey(strDefaultKey.getBytes());
encryptCipher = Cipher.getInstance("DES");
encryptCipher.init(Cipher.ENCRYPT_MODE, key);
decryptCipher = Cipher.getInstance("DES");
decryptCipher.init(Cipher.DECRYPT_MODE, key);
}catch(Exception e){
e.printStackTrace();
}
}
public DESPlus(){
}
public static byte[] encrypt(byte[] arrB) throws Exception {
return encryptCipher.doFinal(arrB);
}
public static byte[] decrypt(byte[] arrB) throws Exception {
return decryptCipher.doFinal(arrB);
}
private static Key getKey(byte[] arrBTmp) throws Exception {
byte[] arrB = new byte[8];
for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
arrB[i] = arrBTmp[i];
}
Key key = new javax.crypto.spec.SecretKeySpec(arrB, "DES");
return key;
}
public static void main(String args[]) {
String str_hello = "1234567 ";
try{
byte[] buffer = str_hello.getBytes();
System.out.println(str_hello+"
");
System.out.print("明文: ");
for(int i=0; i< buffer.length; i++)
System.out.print(Integer.toHexString(buffer[i] & 0xFF)+" ");
System.out.println("
");
buffer = DESPlus.encrypt(buffer);
System.out.print("密文: ");
for(int i=0; i< buffer.length; i++)
System.out.print(Integer.toHexString(buffer[i] & 0xFF)+" ");
System.out.println("
");
buffer = DESPlus.decrypt(buffer);
System.out.print("解密: ");
for(int i=0; i< buffer.length; i++)
System.out.print(Integer.toHexString(buffer[i] & 0xFF)+" ");
} catch (Exception e) {
}
}
}
运行结果：
C:
des.h
/**
* file des.h
*
* Copyright (C) 2006-2010, 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
#define DES_ENCRYPT 1
#define DES_DECRYPT 0
#define POLARSSL_ERR_DES_INVALID_INPUT_LENGTH -0x0C00
/**
* rief DES context structure
*/
typedef struct
{
int mode; /*!< encrypt/decrypt */
unsigned long sk[32]; /*!< DES subkeys */
}
des_context;
/**
* rief Triple-DES context structure
*/
typedef struct
{
int mode; /*!< encrypt/decrypt */
unsigned long sk[96]; /*!< 3DES subkeys */
}
des3_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* rief DES key schedule (56-bit, encryption)
*
* param ctx DES context to be initialized
* param key 8-byte secret key
*/
void des_setkey_enc( des_context *ctx, const unsigned char key[8] );
/**
* rief DES key schedule (56-bit, decryption)
*
* param ctx DES context to be initialized
* param key 8-byte secret key
*/
void des_setkey_dec( des_context *ctx, const unsigned char key[8] );
/**
* rief Triple-DES key schedule (112-bit, encryption)
*
* param ctx 3DES context to be initialized
* param key 16-byte secret key
*/
void des3_set2key_enc( des3_context *ctx, const unsigned char key[16] );
/**
* rief Triple-DES key schedule (112-bit, decryption)
*
* param ctx 3DES context to be initialized
* param key 16-byte secret key
*/
void des3_set2key_dec( des3_context *ctx, const unsigned char key[16] );
/**
* rief Triple-DES key schedule (168-bit, encryption)
*
* param ctx 3DES context to be initialized
* param key 24-byte secret key
*/
void des3_set3key_enc( des3_context *ctx, const unsigned char key[24] );
/**
* rief Triple-DES key schedule (168-bit, decryption)
*
* param ctx 3DES context to be initialized
* param key 24-byte secret key
*/
void des3_set3key_dec( des3_context *ctx, const unsigned char key[24] );
/**
* rief DES-ECB block encryption/decryption
*
* param ctx DES context
* param input 64-bit input block
* param output 64-bit output block
*
*
eturn 0 if successful
*/
int des_crypt_ecb( des_context *ctx,
const unsigned char input[8],
unsigned char output[8] );
/**
* rief 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,
int length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output );
/**
* rief 3DES-ECB block encryption/decryption
*
* param ctx 3DES context
* param input 64-bit input block
* param output 64-bit output block
*
*
eturn 0 if successful
*/
int des3_crypt_ecb( des3_context *ctx,
const unsigned char input[8],
unsigned char output[8] );
/**
* rief 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
*
*
eturn 0 if successful, or POLARSSL_ERR_DES_INVALID_INPUT_LENGTH
*/
int des3_crypt_cbc( des3_context *ctx,
int mode,
int length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output );
/*
* rief Checkup routine
*
*
eturn 0 if successful, or 1 if the test failed
*/
int des_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* des.h */
des.c
/*
* FIPS-46-3 compliant Triple-DES implementation
*
* Copyright (C) 2006-2010, 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.
*/
/*
* DES, on which TDES is based, was originally designed by Horst Feistel
* at IBM in 1974, and was adopted as a standard by NIST (formerly NBS).
*
* http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf
*/
#include "config.h"
#if defined(POLARSSL_DES_C)
#include "des.h"
#include <string.h>
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i)
{
(n) = ( (unsigned long) (b)[(i) ] << 24 )
| ( (unsigned long) (b)[(i) + 1] << 16 )
| ( (unsigned long) (b)[(i) + 2] << 8 )
| ( (unsigned long) (b)[(i) + 3] );
}
#endif
#ifndef PUT_ULONG_BE
#define PUT_ULONG_BE(n,b,i)
{
(b)[(i) ] = (unsigned char) ( (n) >> 24 );
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 );
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 );
(b)[(i) + 3] = (unsigned char) ( (n) );
}
#endif
/*
* Expanded DES S-boxes
*/
static const unsigned long SB1[64] =
{
0x01010400, 0x00000000, 0x00010000, 0x01010404,
0x01010004, 0x00010404, 0x00000004, 0x00010000,
0x00000400, 0x01010400, 0x01010404, 0x00000400,
0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400,
0x00010400, 0x01010000, 0x01010000, 0x01000404,
0x00010004, 0x01000004, 0x01000004, 0x00010004,
0x00000000, 0x00000404, 0x00010404, 0x01000000,
0x00010000, 0x01010404, 0x00000004, 0x01010000,
0x01010400, 0x01000000, 0x01000000, 0x00000400,
0x01010004, 0x00010000, 0x00010400, 0x01000004,
0x00000400, 0x00000004, 0x01000404, 0x00010404,
0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400,
0x00000404, 0x01000400, 0x01000400, 0x00000000,
0x00010004, 0x00010400, 0x00000000, 0x01010004
};
static const unsigned long SB2[64] =
{
0x80108020, 0x80008000, 0x00008000, 0x00108020,
0x00100000, 0x00000020, 0x80100020, 0x80008020,
0x80000020, 0x80108020, 0x80108000, 0x80000000,
0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000,
0x80000000, 0x00008000, 0x00108020, 0x80100000,
0x00100020, 0x80000020, 0x00000000, 0x00108000,
0x00008020, 0x80108000, 0x80100000, 0x00008020,
0x00000000, 0x00108020, 0x80100020, 0x00100000,
0x80008020, 0x80100000, 0x80108000, 0x00008000,
0x80100000, 0x80008000, 0x00000020, 0x80108020,
0x00108020, 0x00000020, 0x00008000, 0x80000000,
0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020,
0x00108000, 0x00000000, 0x80008000, 0x00008020,
0x80000000, 0x80100020, 0x80108020, 0x00108000
};
static const unsigned long SB3[64] =
{
0x00000208, 0x08020200, 0x00000000, 0x08020008,
0x08000200, 0x00000000, 0x00020208, 0x08000200,
0x00020008, 0x08000008, 0x08000008, 0x00020000,
0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200,
0x00020200, 0x08020000, 0x08020008, 0x00020208,
0x08000208, 0x00020200, 0x00020000, 0x08000208,
0x00000008, 0x08020208, 0x00000200, 0x08000000,
0x08020200, 0x08000000, 0x00020008, 0x00000208,
0x00020000, 0x08020200, 0x08000200, 0x00000000,
0x00000200, 0x00020008, 0x08020208, 0x08000200,
0x08000008, 0x00000200, 0x00000000, 0x08020008,
0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008,
0x08020000, 0x08000208, 0x00000208, 0x08020000,
0x00020208, 0x00000008, 0x08020008, 0x00020200
};
static const unsigned long SB4[64] =
{
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802080, 0x00800081, 0x00800001, 0x00002001,
0x00000000, 0x00802000, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002001, 0x00002080,
0x00800081, 0x00000001, 0x00002080, 0x00800080,
0x00002000, 0x00802080, 0x00802081, 0x00000081,
0x00800080, 0x00800001, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00000000, 0x00802000,
0x00002080, 0x00800080, 0x00800081, 0x00000001,
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081,
0x00002001, 0x00002080, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002000, 0x00802080
};
static const unsigned long SB5[64] =
{
0x00000100, 0x02080100, 0x02080000, 0x42000100,
0x00080000, 0x00000100, 0x40000000, 0x02080000,
0x40080100, 0x00080000, 0x02000100, 0x40080100,
0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000,
0x40000100, 0x42080100, 0x42080100, 0x02000100,
0x42080000, 0x40000100, 0x00000000, 0x42000000,
0x02080100, 0x02000000, 0x42000000, 0x00080100,
0x00080000, 0x42000100, 0x00000100, 0x02000000,
0x40000000, 0x02080000, 0x42000100, 0x40080100,
0x02000100, 0x40000000, 0x42080000, 0x02080100,
0x40080100, 0x00000100, 0x02000000, 0x42080000,
0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000,
0x00080100, 0x02000100, 0x40000100, 0x00080000,
0x00000000, 0x40080000, 0x02080100, 0x40000100
};
static const unsigned long SB6[64] =
{
0x20000010, 0x20400000, 0x00004000, 0x20404010,
0x20400000, 0x00000010, 0x20404010, 0x00400000,
0x20004000, 0x00404010, 0x00400000, 0x20000010,
0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000,
0x00404000, 0x20004010, 0x00000010, 0x20400010,
0x20400010, 0x00000000, 0x00404010, 0x20404000,
0x00004010, 0x00404000, 0x20404000, 0x20000000,
0x20004000, 0x00000010, 0x20400010, 0x00404000,
0x20404010, 0x00400000, 0x00004010, 0x20000010,
0x00400000, 0x20004000, 0x20000000, 0x00004010,
0x20000010, 0x20404010, 0x00404000, 0x20400000,
0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010,
0x00004000, 0x00400010, 0x20004010, 0x00000000,
0x20404000, 0x20000000, 0x00400010, 0x20004010
};
static const unsigned long SB7[64] =
{
0x00200000, 0x04200002, 0x04000802, 0x00000000,
0x00000800, 0x04000802, 0x00200802, 0x04200800,
0x04200802, 0x00200000, 0x00000000, 0x04000002,
0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800,
0x04000002, 0x04200000, 0x04200800, 0x00200002,
0x04200000, 0x00000800, 0x00000802, 0x04200802,
0x00200800, 0x00000002, 0x04000000, 0x00200800,
0x04000000, 0x00200800, 0x00200000, 0x04000802,
0x04000802, 0x04200002, 0x04200002, 0x00000002,
0x00200002, 0x04000000, 0x04000800, 0x00200000,
0x04200800, 0x00000802, 0x00200802, 0x04200800,
0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802,
0x00000000, 0x00200802, 0x04200000, 0x00000800,
0x04000002, 0x04000800, 0x00000800, 0x00200002
};
static const unsigned long SB8[64] =
{
0x10001040, 0x00001000, 0x00040000, 0x10041040,
0x10000000, 0x10001040, 0x00000040, 0x10000000,
0x00040040, 0x10040000, 0x10041040, 0x00041000,
0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040,
0x00041000, 0x00040040, 0x10040040, 0x10041000,
0x00001040, 0x00000000, 0x00000000, 0x10040040,
0x10000040, 0x10001000, 0x00041040, 0x00040000,
0x00041040, 0x00040000, 0x10041000, 0x00001000,
0x00000040, 0x10040040, 0x00001000, 0x00041040,
0x10001000, 0x00000040, 0x10000040, 0x10040000,
0x10040040, 0x10000000, 0x00040000, 0x10001040,
0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000,
0x10041040, 0x00041000, 0x00041000, 0x00001040,
0x00001040, 0x00040040, 0x10000000, 0x10041000
};
/*
* PC1: left and right halves bit-swap
*/
static const unsigned long LHs[16] =
{
0x00000000, 0x00000001, 0x00000100, 0x00000101,
0x00010000, 0x00010001, 0x00010100, 0x00010101,
0x01000000, 0x01000001, 0x01000100, 0x01000101,
0x01010000, 0x01010001, 0x01010100, 0x01010101
};
static const unsigned long RHs[16] =
{
0x00000000, 0x01000000, 0x00010000, 0x01010000,
0x00000100, 0x01000100, 0x00010100, 0x01010100,
0x00000001, 0x01000001, 0x00010001, 0x01010001,
0x00000101, 0x01000101, 0x00010101, 0x01010101,
};
/*
* Initial Permutation macro
*/
#define DES_IP(X,Y)
{
T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4);
T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);
T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2);
T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8);
Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF;
T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T;
X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF;
}
/*
* Final Permutation macro
*/
#define DES_FP(X,Y)
{
X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF;
T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T;
Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF;
T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8);
T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2);
T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);
T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4);
}
/*
* DES round macro
*/
#define DES_ROUND(X,Y)
{
T = *SK++ ^ X;
Y ^= SB8[ (T ) & 0x3F ] ^
SB6[ (T >> 8) & 0x3F ] ^
SB4[ (T >> 16) & 0x3F ] ^
SB2[ (T >> 24) & 0x3F ];
T = *SK++ ^ ((X << 28) | (X >> 4));
Y ^= SB7[ (T ) & 0x3F ] ^
SB5[ (T >> 8) & 0x3F ] ^
SB3[ (T >> 16) & 0x3F ] ^
SB1[ (T >> 24) & 0x3F ];
}
#define SWAP(a,b) { unsigned long t = a; a = b; b = t; t = 0; }
static void des_setkey( unsigned long SK[32], const unsigned char key[8] )
{
int i;
unsigned long X, Y, T;
GET_ULONG_BE( X, key, 0 );
GET_ULONG_BE( Y, key, 4 );
/*
* Permuted Choice 1
*/
T = ((Y >> 4) ^ X) & 0x0F0F0F0F; X ^= T; Y ^= (T << 4);
T = ((Y ) ^ X) & 0x10101010; X ^= T; Y ^= (T );
X = (LHs[ (X ) & 0xF] << 3) | (LHs[ (X >> 8) & 0xF ] << 2)
| (LHs[ (X >> 16) & 0xF] << 1) | (LHs[ (X >> 24) & 0xF ] )
| (LHs[ (X >> 5) & 0xF] << 7) | (LHs[ (X >> 13) & 0xF ] << 6)
| (LHs[ (X >> 21) & 0xF] << 5) | (LHs[ (X >> 29) & 0xF ] << 4);
Y = (RHs[ (Y >> 1) & 0xF] << 3) | (RHs[ (Y >> 9) & 0xF ] << 2)
| (RHs[ (Y >> 17) & 0xF] << 1) | (RHs[ (Y >> 25) & 0xF ] )
| (RHs[ (Y >> 4) & 0xF] << 7) | (RHs[ (Y >> 12) & 0xF ] << 6)
| (RHs[ (Y >> 20) & 0xF] << 5) | (RHs[ (Y >> 28) & 0xF ] << 4);
X &= 0x0FFFFFFF;
Y &= 0x0FFFFFFF;
/*
* calculate subkeys
*/
for( i = 0; i < 16; i++ )
{
if( i < 2 || i == 8 || i == 15 )
{
X = ((X << 1) | (X >> 27)) & 0x0FFFFFFF;
Y = ((Y << 1) | (Y >> 27)) & 0x0FFFFFFF;
}
else
{
X = ((X << 2) | (X >> 26)) & 0x0FFFFFFF;
Y = ((Y << 2) | (Y >> 26)) & 0x0FFFFFFF;
}
*SK++ = ((X << 4) & 0x24000000) | ((X << 28) & 0x10000000)
| ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000)
| ((X << 6) & 0x01000000) | ((X << 9) & 0x00200000)
| ((X >> 1) & 0x00100000) | ((X << 10) & 0x00040000)
| ((X << 2) & 0x00020000) | ((X >> 10) & 0x00010000)
| ((Y >> 13) & 0x00002000) | ((Y >> 4) & 0x00001000)
| ((Y << 6) & 0x00000800) | ((Y >> 1) & 0x00000400)
| ((Y >> 14) & 0x00000200) | ((Y ) & 0x00000100)
| ((Y >> 5) & 0x00000020) | ((Y >> 10) & 0x00000010)
| ((Y >> 3) & 0x00000008) | ((Y >> 18) & 0x00000004)
| ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001);
*SK++ = ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000)
| ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000)
| ((X >> 2) & 0x02000000) | ((X << 1) & 0x01000000)
| ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000)
| ((X << 3) & 0x00080000) | ((X >> 6) & 0x00040000)
| ((X << 15) & 0x00020000) | ((X >> 4) & 0x00010000)
| ((Y >> 2) & 0x00002000) | ((Y << 8) & 0x00001000)
| ((Y >> 14) & 0x00000808) | ((Y >> 9) & 0x00000400)
| ((Y ) & 0x00000200) | ((Y << 7) & 0x00000100)
| ((Y >> 7) & 0x00000020) | ((Y >> 3) & 0x00000011)
| ((Y << 2) & 0x00000004) | ((Y >> 21) & 0x00000002);
}
}
/*
* DES key schedule (56-bit, encryption)
*/
void des_setkey_enc( des_context *ctx, const unsigned char key[8] )
{
des_setkey( ctx->sk, key );
}
/*
* DES key schedule (56-bit, decryption)
*/
void des_setkey_dec( des_context *ctx, const unsigned char key[8] )
{
int i;
des_setkey( ctx->sk, key );
for( i = 0; i < 16; i += 2 )
{
SWAP( ctx->sk[i ], ctx->sk[30 - i] );
SWAP( ctx->sk[i + 1], ctx->sk[31 - i] );
}
}
static void des3_set2key( unsigned long esk[96],
unsigned long dsk[96],
const unsigned char key[16] )
{
int i;
des_setkey( esk, key );
des_setkey( dsk + 32, key + 8 );
for( i = 0; i < 32; i += 2 )
{
dsk[i ] = esk[30 - i];
dsk[i + 1] = esk[31 - i];
esk[i + 32] = dsk[62 - i];
esk[i + 33] = dsk[63 - i];
esk[i + 64] = esk[i ];
esk[i + 65] = esk[i + 1];
dsk[i + 64] = dsk[i ];
dsk[i + 65] = dsk[i + 1];
}
}
/*
* Triple-DES key schedule (112-bit, encryption)
*/
void des3_set2key_enc( des3_context *ctx, const unsigned char key[16] )
{
unsigned long sk[96];
des3_set2key( ctx->sk, sk, key );
memset( sk, 0, sizeof( sk ) );
}
/*
* Triple-DES key schedule (112-bit, decryption)
*/
void des3_set2key_dec( des3_context *ctx, const unsigned char key[16] )
{
unsigned long sk[96];
des3_set2key( sk, ctx->sk, key );
memset( sk, 0, sizeof( sk ) );
}
static void des3_set3key( unsigned long esk[96],
unsigned long dsk[96],
const unsigned char key[24] )
{
int i;
des_setkey( esk, key );
des_setkey( dsk + 32, key + 8 );
des_setkey( esk + 64, key + 16 );
for( i = 0; i < 32; i += 2 )
{
dsk[i ] = esk[94 - i];
dsk[i + 1] = esk[95 - i];
esk[i + 32] = dsk[62 - i];
esk[i + 33] = dsk[63 - i];
dsk[i + 64] = esk[30 - i];
dsk[i + 65] = esk[31 - i];
}
}
/*
* Triple-DES key schedule (168-bit, encryption)
*/
void des3_set3key_enc( des3_context *ctx, const unsigned char key[24] )
{
unsigned long sk[96];
des3_set3key( ctx->sk, sk, key );
memset( sk, 0, sizeof( sk ) );
}
/*
* Triple-DES key schedule (168-bit, decryption)
*/
void des3_set3key_dec( des3_context *ctx, const unsigned char key[24] )
{
unsigned long sk[96];
des3_set3key( sk, ctx->sk, key );
memset( sk, 0, sizeof( sk ) );
}
/*
* DES-ECB block encryption/decryption
*/
int des_crypt_ecb( des_context *ctx,
const unsigned char input[8],
unsigned char output[8] )
{
int i;
unsigned long X, Y, T, *SK;
SK = ctx->sk;
GET_ULONG_BE( X, input, 0 );
GET_ULONG_BE( Y, input, 4 );
DES_IP( X, Y );
for( i = 0; i < 8; i++ )
{
DES_ROUND( Y, X );
DES_ROUND( X, Y );
}
DES_FP( Y, X );
PUT_ULONG_BE( Y, output, 0 );
PUT_ULONG_BE( X, output, 4 );
return( 0 );
}
/*
* DES-CBC buffer encryption/decryption
*/
int des_crypt_cbc( des_context *ctx,
int mode,
int length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output )
{
int i;
unsigned char temp[8];
if( length % 8 )
return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH );
if( mode == DES_ENCRYPT )
{
while( length > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( input[i] ^ iv[i] );
des_crypt_ecb( ctx, output, output );
memcpy( iv, output, 8 );
input += 8;
output += 8;
length -= 8;
}
}
else /* DES_DECRYPT */
{
while( length > 0 )
{
memcpy( temp, input, 8 );
des_crypt_ecb( ctx, input, output );
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( output[i] ^ iv[i] );
memcpy( iv, temp, 8 );
input += 8;
output += 8;
length -= 8;
}
}
return( 0 );
}
/*
* 3DES-ECB block encryption/decryption
*/
int des3_crypt_ecb( des3_context *ctx,
const unsigned char input[8],
unsigned char output[8] )
{
int i;
unsigned long X, Y, T, *SK;
SK = ctx->sk;
GET_ULONG_BE( X, input, 0 );
GET_ULONG_BE( Y, input, 4 );
DES_IP( X, Y );
for( i = 0; i < 8; i++ )
{
DES_ROUND( Y, X );
DES_ROUND( X, Y );
}
for( i = 0; i < 8; i++ )
{
DES_ROUND( X, Y );
DES_ROUND( Y, X );
}
for( i = 0; i < 8; i++ )
{
DES_ROUND( Y, X );
DES_ROUND( X, Y );
}
DES_FP( Y, X );
PUT_ULONG_BE( Y, output, 0 );
PUT_ULONG_BE( X, output, 4 );
return( 0 );
}
/*
* 3DES-CBC buffer encryption/decryption
*/
int des3_crypt_cbc( des3_context *ctx,
int mode,
int length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output )
{
int i;
unsigned char temp[8];
if( length % 8 )
return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH );
if( mode == DES_ENCRYPT )
{
while( length > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( input[i] ^ iv[i] );
des3_crypt_ecb( ctx, output, output );
memcpy( iv, output, 8 );
input += 8;
output += 8;
length -= 8;
}
}
else /* DES_DECRYPT */
{
while( length > 0 )
{
memcpy( temp, input, 8 );
des3_crypt_ecb( ctx, input, output );
for( i = 0; i < 8; i++ )
output[i] = (unsigned char)( output[i] ^ iv[i] );
memcpy( iv, temp, 8 );
input += 8;
output += 8;
length -= 8;
}
}
return( 0 );
}
#if defined(POLARSSL_SELF_TEST)
#include <stdio.h>
/*
* DES and 3DES test vectors from:
*
* http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip
*/
static const unsigned char des3_test_keys[24] =
{
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01,
0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23
};
static const unsigned char des3_test_iv[8] =
{
0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF,
};
static const unsigned char des3_test_buf[8] =
{
0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74
};
static const unsigned char des3_test_ecb_dec[3][8] =
{
{ 0xCD, 0xD6, 0x4F, 0x2F, 0x94, 0x27, 0xC1, 0x5D },
{ 0x69, 0x96, 0xC8, 0xFA, 0x47, 0xA2, 0xAB, 0xEB },
{ 0x83, 0x25, 0x39, 0x76, 0x44, 0x09, 0x1A, 0x0A }
};
static const unsigned char des3_test_ecb_enc[3][8] =
{
{ 0x6A, 0x2A, 0x19, 0xF4, 0x1E, 0xCA, 0x85, 0x4B },
{ 0x03, 0xE6, 0x9F, 0x5B, 0xFA, 0x58, 0xEB, 0x42 },
{ 0xDD, 0x17, 0xE8, 0xB8, 0xB4, 0x37, 0xD2, 0x32 }
};
static const unsigned char des3_test_cbc_dec[3][8] =
{
{ 0x12, 0x9F, 0x40, 0xB9, 0xD2, 0x00, 0x56, 0xB3 },
{ 0x47, 0x0E, 0xFC, 0x9A, 0x6B, 0x8E, 0xE3, 0x93 },
{ 0xC5, 0xCE, 0xCF, 0x63, 0xEC, 0xEC, 0x51, 0x4C }
};
static const unsigned char des3_test_cbc_enc[3][8] =
{
{ 0x54, 0xF1, 0x5A, 0xF6, 0xEB, 0xE3, 0xA4, 0xB4 },
{ 0x35, 0x76, 0x11, 0x56, 0x5F, 0xA1, 0x8E, 0x4D },
{ 0xCB, 0x19, 0x1F, 0x85, 0xD1, 0xED, 0x84, 0x39 }
};
/*
* Checkup routine
*/
int des_self_test( int verbose )
{
int i, j, u, v;
des_context ctx;
des3_context ctx3;
unsigned char key[24];
unsigned char buf[8];
unsigned char prv[8];
unsigned char iv[8];
memset( key, 0, 24 );
/*
* ECB mode
*/
for( i = 0; i < 6; i++ )
{
u = i >> 1;
v = i & 1;
if( verbose != 0 )
printf( " DES%c-ECB-%3d (%s): ",
( u == 0 ) ? ' ' : '3', 56 + u * 56,
( v == DES_DECRYPT ) ? "dec" : "enc" );
memcpy( buf, des3_test_buf, 8 );
switch( i )
{
case 0:
des_setkey_dec( &ctx, (unsigned char *) des3_test_keys );
break;
case 1:
des_setkey_enc( &ctx, (unsigned char *) des3_test_keys );
break;
case 2:
des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys );
break;
case 3:
des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys );
break;
case 4:
des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys );
break;
case 5:
des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys );
break;
default:
return( 1 );
}
for( j = 0; j < 10000; j++ )
{
if( u == 0 )
des_crypt_ecb( &ctx, buf, buf );
else
des3_crypt_ecb( &ctx3, buf, buf );
}
if( ( v == DES_DECRYPT &&
memcmp( buf, des3_test_ecb_dec[u], 8 ) != 0 ) ||
( v != DES_DECRYPT &&
memcmp( buf, des3_test_ecb_enc[u], 8 ) != 0 ) )
{
if( verbose != 0 )
printf( "failed
" );
return( 1 );
}
if( verbose != 0 )
printf( "passed
" );
}
if( verbose != 0 )
printf( "
" );
/*
* CBC mode
*/
for( i = 0; i < 6; i++ )
{
u = i >> 1;
v = i & 1;
if( verbose != 0 )
printf( " DES%c-CBC-%3d (%s): ",
( u == 0 ) ? ' ' : '3', 56 + u * 56,
( v == DES_DECRYPT ) ? "dec" : "enc" );
memcpy( iv, des3_test_iv, 8 );
memcpy( prv, des3_test_iv, 8 );
memcpy( buf, des3_test_buf, 8 );
switch( i )
{
case 0:
des_setkey_dec( &ctx, (unsigned char *) des3_test_keys );
break;
case 1:
des_setkey_enc( &ctx, (unsigned char *) des3_test_keys );
break;
case 2:
des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys );
break;
case 3:
des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys );
break;
case 4:
des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys );
break;
case 5:
des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys );
break;
default:
return( 1 );
}
if( v == DES_DECRYPT )
{
for( j = 0; j < 10000; j++ )
{
if( u == 0 )
des_crypt_cbc( &ctx, v, 8, iv, buf, buf );
else
des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf );
}
}
else
{
for( j = 0; j < 10000; j++ )
{
unsigned char tmp[8];
if( u == 0 )
des_crypt_cbc( &ctx, v, 8, iv, buf, buf );
else
des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf );
memcpy( tmp, prv, 8 );
memcpy( prv, buf, 8 );
memcpy( buf, tmp, 8 );
}
memcpy( buf, prv, 8 );
}
if( ( v == DES_DECRYPT &&
memcmp( buf, des3_test_cbc_dec[u], 8 ) != 0 ) ||
( v != DES_DECRYPT &&
memcmp( buf, des3_test_cbc_enc[u], 8 ) != 0 ) )
{
if( verbose != 0 )
printf( "failed
" );
return( 1 );
}
if( verbose != 0 )
printf( "passed
" );
}
if( verbose != 0 )
printf( "
" );
return( 0 );
}
#endif
#endif
usedes.c
#include <stdio.h>
#include <string.h>
#include "des.h"
#define BUFSIZE 1024
int main(int argc, char* argv[])
{
int i, j;
unsigned char buf[BUFSIZE];
unsigned long tsc;
unsigned char tmp[64];
unsigned int num = 8;
des_context des;
des3_context des3;
memset(tmp, 0, sizeof(tmp)); strcpy(tmp, "initkey");
memset(buf, 0, sizeof(buf)); strcpy(buf, "1234567");
des_setkey_enc( &des, tmp);
printf("pwd=%s, txt=%s
", tmp, buf);
des_crypt_ecb(&des, buf, buf);
// des_crypt_cbc(&des, DES_ENCRYPT, num, tmp, buf, buf );
printf("encrypt txt=");
for(i=0; i<num; i++) printf("%02x ", buf[i]);
printf("
");
memset(tmp, 0, sizeof(tmp)); strcpy(tmp, "initkey");
des_setkey_dec(&des, tmp);
des_crypt_ecb(&des, buf, buf );
// des_crypt_cbc(&des, DES_DECRYPT, num, tmp, buf, buf );
printf("decrypt txt=");
for(i=0; i<num; i++) printf("%02x ", buf[i]);
printf("
");
memset(tmp, 0, sizeof(tmp)); strcpy(tmp, "01234567abcdefgh");
memset(buf, 0, sizeof(buf)); strcpy(buf, "aaaaaaaa");
des3_set3key_enc( &des3, tmp);
printf("DES3 pwd=%s, txt=%s
", tmp, buf);
des3_crypt_cbc(&des3, DES_ENCRYPT, 8, tmp, buf, buf );
printf("encrypt txt=", tmp, buf, buf);
for(i=0; i<8; i++) printf("%02x ", buf[i]);
printf("
");
memset(tmp, 0, sizeof(tmp)); strcpy(tmp, "01234567abcdefgh");
des3_set3key_dec(&des3, tmp);
des3_crypt_cbc(&des3, DES_DECRYPT, 8, tmp, buf, buf );
printf("decrypt txt=");
for(i=0; i<8; i++) printf("%02x ", buf[i]);
printf("
");
}
Makefile
usedes: usedes.c des.c des.h gcc -o des usedes.c des.c des.h
运行结果：
结论： java和C的运行结果一致，可进行加解密