des_2.c

基于cc1010的设计实例

/*****************************************************************************
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 *      ***        ***                                                       *
 *      ***   +++   ***                                                      *
 *      ***   + +   ***                                                      *
 *      ***   +                    CHIPCON CC1010 EXAMPLE PROGRAM            *
 *      ***   + +   ***                      Triple DES                      *
 *      ***   +++   ***                                                      *
 *      ***       ***                                                        *
 *       ***********                                                         *
 *        *********                                                          *
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 * This program demonstrates the use of the halDES() function for encrypting *
 * and decrypting data with the supported triple DES OFB and CFB modes.      *
 *                                                                           *
 *****************************************************************************
 * Author:              ARR                                                  *
 *****************************************************************************
 * Revision history:                                                         *
 * 1.0  2002/08/29      First public release                                 *
 *                                                                           *
 * $Log: des_2.c,v $
 * Revision 1.2  2002/11/18 10:42:03  kht
 * Added startup macros
 *
 * Revision 1.1  2002/10/11 14:56:42  tos
 * Initial version in CVS.
 *
 *                                                                           *
 ****************************************************************************/

#include <chipcon/hal.h>
#include <chipcon/cc1010eb.h>
#include <stdlib.h>
#include <string.h>

// Define some constants
#define RND_LENGTH 100
#define KEY_LENGTH 24

// Define the absolute addresses to use in the halDES() function
#define RAMBUF_ADDRESS 0x0000
#define CRPKEY_ADDRESS 0x0100

// Set up RAM buffers for halDES()
byte xdata ramBuf[RND_LENGTH] _at_ RAMBUF_ADDRESS;
byte xdata keyBuf[KEY_LENGTH] _at_ CRPKEY_ADDRESS;

// Arrays which will be initialized with random bytes
byte xdata rndData[RND_LENGTH];
byte xdata rndKeys[KEY_LENGTH];

int main() {

    word i;

    // Turn off watchdog timer
    WDT_ENABLE(FALSE);

    // Startup macros for speed and low power consumption
    MEM_NO_WAIT_STATES();
    FLASH_SET_POWER_MODE(FLASH_STANDBY_BETWEEN_READS);
    
    // All I/Os are inputs after reset. Make I/Os connected to LEDs outputs
    RLED=YLED=GLED=BLED=LED_OFF;
    RLED_OE(TRUE); YLED_OE(TRUE); GLED_OE(TRUE); BLED_OE(TRUE);

    // Fill rndData and rndKeys with random contents
    srand(0xABCD);
    for (i=0; i<RND_LENGTH; i++)
        rndData[i]=rand()%0xFF;
    srand(0x1357);
    for (i=0; i<KEY_LENGTH; i++)
        rndKeys[i]=rand()%0xFF;
    
    // Copy data and key to buffers in XRAM
    memcpy(ramBuf, rndData, RND_LENGTH);
    memcpy(keyBuf, rndKeys, KEY_LENGTH);

    // Encrypt and decrypt data with triple DES OFB mode using the 
    // halDES() function. Then check to see if succeeded. If so
    // light up Yellow LED, otherwise light up Red LED.
    halDES(DES_TRIPLE_DES | DES_ENCRYPT | DES_OFB_MODE,
       &ramBuf, &keyBuf, RND_LENGTH);
    halDES(DES_TRIPLE_DES | DES_DECRYPT | DES_OFB_MODE,
       &ramBuf, &keyBuf, RND_LENGTH);
    if (memcmp(ramBuf, rndData, RND_LENGTH))
        RLED=LED_ON;                    // Verify failed
    else
        YLED=LED_ON;                    // Verify OK

    // Encrypt and decrypt data with triple DES CFB mode using the 
    // halDES() function. Then check to see if succeeded. If so
    // light up Green LED, otherwise light up Red LED.
    halDES(DES_TRIPLE_DES | DES_ENCRYPT | DES_CFB_MODE,
       &ramBuf, &keyBuf, RND_LENGTH);
    halDES(DES_TRIPLE_DES | DES_DECRYPT | DES_CFB_MODE,
       &ramBuf, &keyBuf, RND_LENGTH);
    if (memcmp(ramBuf, rndData, RND_LENGTH))
        RLED=LED_ON;                    // Verify failed
    else
        GLED=LED_ON;                    // Verify OK

    // Infinite loop
    while (1);
}