Implementing Des,3des encryption using the OpenSSL library

Finishing reprint from: http://blog.csdn.net/xuplus/article/details/2607254
The main is to adjust the format, as well as some types of variables to solve in the VC2008 can not compile the problem.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/des.h>
/************************************************************************
* * This example uses:
* * 3DES-ECB encryption method;
* * 24-bit key, less than 24-bit right complement 0x00;
* * Encrypted content 8-bit, the completion of the way is: less than 1 to fill a 0x01, less 2 to fill two 0x02,...
* * itself is 8-bit aligned, followed by eight 0x08.
************************************************************************/
int main (void)
{
int docontinue = 1;
char *data = "Hello world!"; /* Clear * *
int Data_len;
int data_rest;
unsigned char ch;
unsigned char *src = NULL; * * After the clear text/
unsigned char *dst = NULL; * * After the decryption of clear text * *
int Len;
unsigned char tmp[8];
unsigned char in[8];
unsigned char out[8];
Char *k = "01234567899876543210"; /* Original key/*
int Key_len;
#define LEN_OF_KEY 24
unsigned char Key[len_of_key]; * * After the completion of the key/
unsigned char block_key[9];
Des_key_schedule KS,KS2,KS3;
/* The key after completion of the construction * *
Key_len = strlen (k);
memcpy (key, K, Key_len);
memset (key + Key_len, 0x00, Len_of_key-key_len);
/* Analysis of the space required to complete the clear text and fill the data * *
Data_len = strlen (data);
Data_rest = data_len% 8;
Len = Data_len + (8-data_rest);
ch = 8-data_rest;
src = (unsigned char *) malloc (len);
DST = (unsigned char *) malloc (len);
if (NULL = src | | NULL = DST)
{
docontinue = 0;
}
if (docontinue)
{
int count;
int i;
/* Construction After the completion of the encrypted content * *
memset (src, 0, Len);
memcpy (SRC, data, data_len);
memset (src + data_len, ch, 8-data_rest);
/* Key Replacement * *
memset (block_key, 0, sizeof (block_key));
memcpy (Block_key, key + 0, 8);
Des_set_key_unchecked ((const_des_cblock*) Block_key, &ks);
memcpy (Block_key, key + 8, 8);
Des_set_key_unchecked ((const_des_cblock*) Block_key, &AMP;KS2);
memcpy (Block_key, key + 16, 8);
Des_set_key_unchecked ((const_des_cblock*) Block_key, &AMP;KS3);
printf ("Before encrypt:\n");
for (i = 0; i < len; i++)
{
printf ("0x%.2x", * (src + i));
}
printf ("\ n");
/* Loop encryption/decryption, once per 8 bytes * *
Count = LEN/8;
for (i = 0; i < count; i++)
{
memset (TMP, 0, 8);
memset (in, 0, 8);
memset (out, 0, 8);