文件加密

以前写得一个简单文件异或加密解密，你试着看下，对你是否有帮助。
#include <stdio.h>
#include <stdlib.h>
void encode(char* path_source, char* path_aim, unsigned char pwd);
void decode(char* path_source, char* path_aim, unsigned char pwd);
int main(void)
{
    unsigned char pwd = 230;
    char path_source[100] = "D:\\DEV C++\\ok.txt";
    char path_aim[100] = "D:\\DEV C++\\ok_encode.txt";
    encode(path_source, path_aim, pwd);
   /* char path_source[100] = "D:\\DEV C++\\ok_encode.txt";
    char path_aim[100] = "D:\\DEV C++\\ok_decode.txt";
    decode(path_source, path_aim, pwd); */
    return 0;
}
void encode(char* path_source, char* path_aim, unsigned char pwd)
{
    FILE* pf_source;//源文件指针
    FILE* pf_aim;//目标文件
   
    pf_source = fopen(path_source, "rb");//二进制，若是r,可能会有误差
                                         //源文件文件是可打开，并读取文件
       pf_aim = fopen(path_aim, "wb");//目标文件可打开，并写入文件
    if(NULL == pf_source || NULL == pf_aim)
    {
        printf("加密失败\n");
        return;
    }
    char ch = fgetc(pf_source);
    while(ch != EOF)
    {
        //加密处理
        ch = ch ^ pwd;
        fputc(ch, pf_aim);
        ch = fgetc(pf_source);
    }
    fclose(pf_source);
    fclose(pf_aim);
    printf("加密成功\n");
}
 void decode(char* path_source, char* path_aim, unsigned char pwd)
{
    FILE* pf_source;//源文件指针
    FILE* pf_aim;//目标文件
   
    pf_source = fopen(path_source, "rb");//二进制，若是r,可能会有误差
    pf_aim = fopen(path_aim, "wb");
    if(NULL == pf_source || NULL == pf_aim)
    {
        printf("解密失败\n");
        return;
    }
    char ch = fgetc(pf_source);
    while(ch != EOF)
    {
        //解密处理
        ch = ch ^ pwd;
        fputc(ch, pf_aim);
        ch = fgetc(pf_source);
    }
    fclose(pf_source);
    fclose(pf_aim);
    printf("解密成功\n");
}

[此贴子已经被作者于2019-6-23 21:41编辑过]