加密文件-优快云博客

本文介绍了一个简单的文件加密解密程序实现，该程序通过用户输入的密码进行基本的加密和解密操作，并能将加密后的文件保存到指定路径。

#include<stdio.h>
#include<stdlib.h>
void main() {
//复制一个文件，需要输入两个数据。一个是被复制的文件，一个是需要复制到哪里。
//加密程序其实已经完成了70%。
char l_in_path[200] = { 0 };
char l_out_path[200] = { 0 };
char l_pass[50] = { 0 };
int l_tools = NULL;

printf("请输入源文件路径：");
scanf("%s", l_in_path);
printf("请输入新文件路径：");
scanf("%s", l_out_path);
printf("请输入密码：");
scanf("%s", l_pass);

printf("输入1为加密，输入2为解密：");
scanf("%d", &l_tools);
if (l_tools != 1 && l_tools != 2) {
printf("功能输入选择错误\n");
return;
}
FILE * l_fp_read = fopen(l_in_path, "rb");
FILE * l_fp_write = fopen(l_out_path, "wb");

if (l_fp_read != NULL && l_fp_write != NULL) {
  if (l_tools == 1) {
   char l_temp = fgetc(l_fp_read);
   while (feof(l_fp_read) == 0) {
    l_temp = l_temp + 40;
    fputc(l_temp, l_fp_write);
    l_temp = fgetc(l_fp_read);
   }
  }
  else {
   char l_temp = fgetc(l_fp_read);
   while (feof(l_fp_read) == 0) {
    l_temp = l_temp - 40;
    fputc(l_temp, l_fp_write);
    l_temp = fgetc(l_fp_read);
   }
  }

}
fclose(l_fp_read);
fclose(l_fp_write);
printf("已复制成功\n");
system("pause");
}

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void main() {
//复制一个文件，需要输入两个数据。一个是被复制的文件，一个是需要复制到哪里。
//加密程序其实已经完成了70%。
char l_in_path[200] = { 0 };
char l_out_path[200] = { 0 };
char l_pass[50] = { 0 };
int l_tools = NULL;

printf("请输入源文件路径：");
scanf("%s", l_in_path);
printf("请输入新文件路径：");
scanf("%s", l_out_path);
printf("请输入密码：");
scanf("%s", l_pass);

printf("输入1为加密，输入2为解密：");
scanf("%d", &l_tools);
if (l_tools != 1 && l_tools != 2) {
printf("功能输入选择错误\n");
return;
}

FILE * l_fp_read = fopen(l_in_path, "rb");
FILE * l_fp_write = fopen(l_out_path, "wb");
int l_length = strlen(l_pass);
int l_count = 0;

if (l_fp_read != NULL && l_fp_write != NULL) {
  if (l_tools == 1) {
   char l_temp = fgetc(l_fp_read);
   while (feof(l_fp_read) == 0) {
    l_temp = l_temp ^ l_pass[l_count];
    l_temp = l_temp + l_count;
    l_count++;
    if (l_count == l_length) {
     l_count = 0;
    }

    fputc(l_temp, l_fp_write);
    l_temp = fgetc(l_fp_read);
   }
  }
  else {
   char l_temp = fgetc(l_fp_read);
   while (feof(l_fp_read) == 0) {
    l_temp = l_temp - l_count;
    l_temp = l_temp ^ l_pass[l_count];
    l_count++;
    if (l_count == l_length) {
     l_count = 0;
    }
    fputc(l_temp, l_fp_write);
    l_temp = fgetc(l_fp_read);
   }
  }