DES加密解密C/C++

DES加密解密库
http://www.ualberta.ca/dept/chemeng/AIX-43/share/man/info/C/a_doc_lib/libs/commtrf1/cbc_crypt.htm

头文件”des_crypt.h”

示例

#include 
#include 
using namespace std;

//DES ECB加密
void des_encrypt(const char *key, char *data, int len)
{
    char pkey[8];
    strncpy(pkey, key, 8);
    des_setparity(pkey);
    ecb_crypt(pkey, data, len, DES_ENCRYPT);
}
//DES ECB解密
void des_decrypt(const char *key, char *data, int len)
{
    char pkey[8];
    strncpy(pkey, key, 8);
    des_setparity(pkey);
    ecb_crypt(pkey, data, len, DES_DECRYPT);
}

//DES CBC加密
void cbc_des_encrypt(const char *key, char *data, int len, const char *ivec)
{
    char pkey[8];
    strncpy(pkey, key, 8);
    char vec[8];
    strncpy(vec, ivec, 8);
    des_setparity(pkey);
    cbc_crypt(pkey, data, len, DES_ENCRYPT, vec);
}

//DES CBC解密
void cbc_des_decrypt(const char *key, char *data, int len, const char *ivec)
{
    char pkey[8];
    strncpy(pkey, key, 8);
    char vec[8];
    strncpy(vec, ivec, 8);
    des_setparity(pkey);
    cbc_crypt(pkey, data, len, DES_DECRYPT, vec);
}

int main()
{
    char data[4096] = "cea3e8e1659582206e0be32539729e9ff";
    int len = strlen(data);
    cout<//获取数据需要多少个8字节容纳
    int slice_num = 0;
    if(len % 8 == 0)
    {
        slice_num = len/8;
    }
    else
    {
        slice_num = len/8 + 1;
    }
    cbc_des_encrypt("desmiyao", data, slice_num*8, "cbcinive");

    printf("%s\n", data);

    cbc_des_decrypt("desmiyao", data, slice_num*8, "cbcinive");
    cout<return 0;
}