加密解密(快).cpp

加密文件软件源代码

#include<fstream.h>
#include<string.h>
#include<stdlib.h>
#include<math.h>
const int  min=5,chsize=15;
void createcode(char *pass,int lens,int *code,int height,int types,int &sum)
{
	int num=int(pow(2,height+1))-1,*temp=new int [num],pos=0;
	sum=0;
	  for(int i=0;i<lens;i++)
	  {
		  temp[0]=int(pass[i])*(i+1);
		  sum+=int(pass[i]);
		  for(int j=0;j<int(pow(2,height))-1;j++)
		  {
			  temp[2*j+1]=int(fabs(cos(temp[j])*10000));
			   temp[2*j+2]=int(fabs(sin(temp[j])*10000));
			  if(types==1)
			  {
				  int tt=temp[2*j+1];
				   temp[2*j+1]=temp[2*j+2];
				    temp[2*j+2]=tt;
			  }
		  }
		  for(j=int(pow(2,height))-1;j<num;j++)
		  {
			  code[pos]=temp[j];
			  pos++;
		  }
	  }
}
void transform(int *outch,int *code,int size)
{
  int ch[chsize][chsize];
	for(int i=0;i<chsize;i++)
		for(int j=0;j<chsize;j++)
			ch[i][j]=i*chsize+j;
		for(i=0;i<size;i++)
		{
			int high=(code[i]/100)%chsize,low=(code[i]%100)%chsize;
			 if (high==low)
				 low=(low+1)%chsize;
			 if(i%2==0)
			 {
				 for(int j=0;j<chsize;j++)
				 {
					 int t=ch[high][j];
					   ch[high][j]=ch[low][j];
					     ch[low][j]=t;
				 }
				 for(j=0;j<chsize;j++)
				 {
					 int t=ch[j][high];
					  ch[j][high]=ch[j][low];
					   ch[j][low]=t;
				 }
			 }
			 else
			 {
				 for(int j=0;j<chsize;j++)
				 {
					 int t=ch[high][j];
					   ch[high][j]=ch[j][low];
					     ch[j][low]=t;
				 }
				 for(j=0;j<chsize;j++)
				 {
					 int t=ch[j][high];
					  ch[j][high]=ch[low][j];
					   ch[low][j]=t;
				 }
			 }
		}
		for(i=0;i<chsize*chsize;i++)
		{
			outch[i]=ch[i/chsize][i%chsize];
		}
}
int checkfiletype(char file[])
{
	int len=int(strlen(file));
	 if(len>=3&&file[len-1]=='q'&&file[len-2]=='w'&&file[len-3]=='l')
		 return 1;
	   return 0;
}
void usage(int type)
{
cout<<"    ╭╮                                                ╭╮"<<endl;
cout<<"  ╭═║╮                                            ╭║═╮"<<endl;
cout<<"╭═║═║═════════════════════║═║═╮"<<endl;
cout<<"╰║═║╯                                           ╰║═║╯"<<endl;
cout<<"  ╰║╯         欢迎大家学习使用，在传播过程中        ╰║╯"<<endl;
cout<<"    ║           请保留本人版权：华北电力大学计          ║"<<endl;
cout<<"    ║           算机025 yixiu006 qq:327591387           ║"<<endl;
cout<<"  ╭║╮                                               ╭║╮ "<<endl;
cout<<"╭║═║╮                                           ╭║═║╮"<<endl;
cout<<"╰═║═║═════════════════════║═║═╯"<<endl;
cout<<"  ╰═║╯                                           ╰║═╯"<<endl;
cout<<"    ╰╯                                               ╰╯ "<<endl;
if(type==1)
{
	cout<<"                        用法："<<endl;
	cout<<"加密：将要加密的文件拖动到这个exe文件上面再按照要求做!"<<endl;
	cout<<"解密：也是将要解密的*.lwq文件拖动到这个exe文件上面!"<<endl;
}
}
int checkhead(char file[])
{
	int  ch[chsize*chsize];
	 for(int i=0;i<chsize*chsize;i++)
		 ch[i]=0;
	   ifstream fin(file,ios::binary);
		  char ach;
			   fin.get(ach);
				 for(int j=0;j<chsize*chsize;j++)
				 {
					 if(fin.eof())
					 {
						fin.close();
						 return 0;
					 }
					   else
					   {
						   ch[(int(ach)+256)%256]=1;
						    fin.get(ach);
					   }
				 }
				 int num=0;
				 for(i=0;i<chsize*chsize;i++)
					 if(ch[i]==1)
						 num++;
				  fin.close();
				   if(num>=chsize*chsize)
					   return 1;
				          return 0;
}
int checkpass(char file[],char pass[])
{
	ifstream fin(file,ios::binary);
	 char ch,filehead[chsize*chsize];
	  int lens=int(strlen(pass)),height=0,flag=1,size,sum,head[chsize*chsize];
	   while(flag<=lens)
	   {
		   height++;
		    flag*=2;
	   }
	   height=min-height+1;
	   size=lens*int(pow(2,height));
	   int *code=new int [size];
	   createcode(pass,lens,code,height,0,sum);
	   transform(head,code,size);
		   fin.get(ch);
		     for(int i=0;i<chsize*chsize;i++)
			 {
				 if(fin.eof())
				 {
					fin.close();
					  delete []code;
					    return 0;
				 }
				  filehead[i]=ch;
				   fin.get(ch);
			 }
			  int match=1;
			   for(i=0;i<chsize*chsize&&match;i++)
				   if(filehead[i]!=char(head[i]))
					   match=0;
				          fin.close();
					          delete []code;
				   return match;
}
void change(char ch[])
{
	int len=int(strlen(ch)),addlwq=1;
	 if(len<5)
		 addlwq=1;
	   else
		   if(ch[len-1]=='q'&&ch[len-2]=='w'&&ch[len-3]=='l'&&ch[len-4]=='.')
			   addlwq=0;
		    else
				addlwq=1;
			if(addlwq)
			{
				ch[len]='.';
				 ch[len+1]='l';
				  ch[len+2]='w';
				   ch[len+3]='q';
				    ch[len+4]='\0';
			}
			else
				ch[len-4]='\0';
}
int checkblank(char path[])
{
	for(int i=0;i<int(strlen(path));i++)
		if(path[i]==' ')
			return 1;
		       return 0;
}
void del(char path[])
{
	char cmd[4]="del";
	 int length=int(strlen(path));
	 if(!checkblank(path))
	 {
	   char  *command=new char[length+5];
	    for(int i=0;i<3;i++)
			command[i]=cmd[i];
		     command[3]=' ';
			  for(i=4;i<length+4;i++)
				  command[i]=path[i-4];
			       command[i]='\0';
					 system(command);
					  delete []command;
	 }
	 else
	 {
		 char *command=new char[length+7];
		 for(int i=0;i<3;i++)
			 command[i]=cmd[i];
		       command[3]=' ';
			    command[4]='\"';
				 for(i=5;i<length+5;i++)
					 command[i]=path[i-5];
				       command[i]='\"';
					    command[i+1]='\0';
						 system(command);
						  delete []command;
	 }
}
void  main(int argc,char *argv[])
{
  if(argc!=2)
  {
	  usage(1);
	  cout<<"参数错误!"<<endl;
	   system("pause");
	    return;
  }
  else
  {  
	  usage(0);
	  int len=int(strlen(argv[1])),operation,maxpass=int(pow(2,min+1)),sum=0;
	   char *newfile=new char[len+5],*pass=new char[maxpass],ch,chbak;
	   int head[chsize*chsize],tran[chsize*chsize];
	    strcpy(newfile,argv[1]);
		 change(newfile);
		  operation=checkfiletype(argv[1]);
		   if(operation)
		   {
			   if(checkhead(argv[1]))
			   {
				   cout<<"请输入解密密码!"<<endl;
				    cin>>pass;
					 if(int(strlen(pass))>maxpass||!checkpass(argv[1],pass))
					 {
						 cout<<"密码不正确!"<<endl;
				          delete []newfile;
				        	 delete []pass;
							  system("pause");
					            return;
					 }
					 else
					 {  
					   int lens=int(strlen(pass)),height=0,flag=1,size;
	                    while(flag<=lens)
						{
		                 height++;
		                  flag*=2;
						}
	                    height=min-height+1;
	                    size=lens*int(pow(2,height));
						int *code=new int [size];
	                    createcode(pass,lens,code,height,1,sum);
	                    transform(tran,code,size);
						ifstream fin(argv[1],ios::binary);
						 ofstream  fout(newfile,ios::binary);
						   for(int i=0;i<chsize*chsize;i++)
							   fin.get(ch);
						   int pos=0;
						   fin.get(chbak);
						    fin.get(ch);
						   while(!fin.eof())
						   {
							   fout.put(char((int(chbak)-tran[(pos+sum)%(chsize*chsize)])%256));
							    chbak=ch;
								 fin.get(ch);
							      pos=(pos+1)%256;
						   }
						    int changed=0;
							 if(chbak!=char(pos))
							 {
								 cout<<"文件内容被手工改动!内容与加密前不一致!"<<endl;
									   changed=1;
							 }
							 else
								 cout<<"解密成功!"<<endl;
						        	 fin.close();
									      fout.close();
										   if(changed==0)
										    del(argv[1]);
										     delete []newfile;
											  delete []code;
											   delete []pass;
											    system("pause");
												 return;
					 }
			   }
			   else
			   {
				   cout<<"文件头已经被损坏!"<<endl;
				    delete []newfile;
					 delete []pass;
					  system("pause");
					   return;
			   }
		   }
		   else
		   {
			   cout<<"请输入加密密码!"<<maxpass<<"位内，建议6位以上!"<<endl;
			    cin>>pass;
				while(int(strlen(pass))>maxpass)
				 {
					 cout<<"密码不符合要求，"<<maxpass<<"位以内!"<<endl;
					  cin>>pass;
				 }
				ifstream fin(argv[1],ios::binary);
	              ofstream  fout(newfile,ios::binary);
				  int lens=int(strlen(pass)),height=0,flag=1,size;
	                    while(flag<=lens)
						{
		                 height++;
		                  flag*=2;
						}
	                    height=min-height+1;
	                    size=lens*int(pow(2,height));
						int *code=new int [size];
	                    createcode(pass,lens,code,height,1,sum);
	                    transform(tran,code,size);
						 createcode(pass,lens,code,height,0,sum);
	                      transform(head,code,size);
						  for(int i=0;i<chsize*chsize;i++)
						     fout.put(char(head[i]));
						    fin.get(ch);
						   if(fin.eof())
						   {
							   cout<<"空文件不需要加密!"<<endl;
							    fin.close();
								 fout.close();
								  del(newfile);
								   delete []newfile;
								    delete []pass;
									  delete []code;
									   system("pause");
								      return ;
						   }
						   int pos=0;
						    while(!fin.eof())
						   {
								fout.put(char((int(ch)+tran[(pos+sum)%(chsize*chsize)])%256));
							    fin.get(ch);
								 pos=(pos+1)%256;
						   }
							fout.put(char(pos));
							fin.close();
							  fout.close();
							   del(argv[1]);
							    delete []newfile;
								 delete []pass;
								  delete []code;
							     cout<<"加密成功!"<<endl;
								  system("pause");
		   }
  }
}