AES和MD5加密Demo

#include <stdio.h> #include <windows.h> #include <iostream.h> #include <string.h> typedef void (* ENC)(char*,long,char*,char*); typedef void (* DEC)(char*,long,char*,char*); typedef void (* HASH)(char*,long,char*); //声明实例并指向空 HINSTANCE dllhinst=NULL; ENC encAES=NULL; DEC decAES=NULL; HASH hash=NULL; BOOL Init() { dllhinst=LoadLibrary("xsecu");//将动态库xsecu映射到dllhinst if (dllhinst!=NULL) //判断动态库xsecu是否为空 { encAES=(ENC)GetProcAddress(dllhinst, "enc");//将库中函数enc映射到enc decAES=(DEC)GetProcAddress(dllhinst, "dec");//将库中函数dec映射到dec hash=(HASH)GetProcAddress(dllhinst, "hash");//将库中函数hash映射到hash if (!encAES||!decAES||!hash) //失败的话释放dllhinst { FreeLibrary(dllhinst); return FALSE; } } else return FALSE; return TRUE; } void main() { char *buffer3 = new char [100];//用于存AES加密密钥 memset(buffer3, 0, 100); if(!Init()) { printf("Fail to Load DLLs."); return; } char n; cout<<"1 AES 加密！"<<endl; cout<<"2 AES 解密！"<<endl; cout<<"3 计算文件MD5！"<<endl; cout<<"4 退出！"<<endl; cin>>n; while(n!='4' && n!='3' && n!='2' && n!='1') { cout<<"你选择有错误，请重新选择"<<endl; cout<<"1 AES 加密！"<<endl; cout<<"2 AES 解密！"<<endl; cout<<"3 计算文件MD5！"<<endl; cout<<"4 退出！"<<endl; cin>>n; } FILE *fpread; //所读文件指针 FILE *fpwrite; //要写入的文件指针 char path[500]; //放置文件路径 memset(path, 0, 500); while(n!='4') { if ( n == '1')//AES加密 { cout<<"请输入加密文件路径："<<endl; cin>>path; while((fpread=fopen(path,"rb"))==NULL) { cout<<"加密文件打开失败，请检查文件名称或路径是否有错误!"<<endl; cout<<"请重新输入："<<endl; cin>>path; } fseek(fpread, 0, 2);//将文件指针定位到文件末尾 long len = ftell(fpread)+(16-ftell(fpread)%16);//计算文件长度,不足16字节的部分补足 rewind(fpread); char *buffer1 = new char [len];//定义二个字符串 char *buffer2 = new char [len]; memset(buffer1, 0, len);//清空字符串 memset(buffer2, 0, len); if (!buffer1) { MessageBox(NULL,"Allocating fail","",0); } else { try { fread(buffer1,1,len,fpread); } catch(char *e) { cout<<e<<"读取文件打开失败"<<endl; fclose(fpread); delete buffer1; } cout<<"输入AES加密密钥:"<<endl; cin>>buffer3; //输入AES加密密钥 encAES((char *)buffer1,len,buffer3,(char *)buffer2); } delete buffer1; fclose(fpread); cout<<"加密成功!"<<endl; fpwrite=fopen("e:\\testAES.txt","wb+");//e:\\testAES.txt fwrite(buffer2,1,len,fpwrite); //将加密后的内容写入到文件 cout<<"加密文件已经保存到 e:\\testAES.txt"<<endl; //cout<<" 你选择有错误，请重新选择"<<endl; cout<<" 1 AES 加密！ "<<endl; cout<<" 2 AES 解密！ "<<endl; cout<<" 3 计算文件MD5！"<<endl; cout<<" 4 退出！ "<<endl; cin>>n; delete buffer2; fclose(fpwrite); } else if (n=='2') //AES解密 { cout<<"请输入解密文件路径："<<endl; cin>>path; while((fpread=fopen(path,"rb"))==NULL) { cout<<"解密文件打开失败，请检查文件名称或路径是否有错误!"<<endl; cout<<"请重新输入："<<endl; cin>>path; } fseek(fpread, 0, 2); long length = ftell(fpread); rewind(fpread); char *temp1 = new char [length]; char *temp2 = new char [length]; memset(temp1, 0, length); memset(temp2, 0, length); if (!temp1) { MessageBox(NULL,"Allocating fail","",0); } else { try { fread(temp1,1,length,fpread);//将文件中的内容读入一个临时数组 } catch(char *e) //捕获异常 { cout<<e<<"读取文件打开失败"<<endl; fclose(fpread); delete temp1; } decAES((char *)temp1,length,(char*)buffer3,(char *)temp2);//加密和解密使用相同的密钥 } delete temp1; fclose(fpread); cout<<"解密文件成功"<<endl; fpwrite=fopen("e:\\testA.txt","wb+"); fwrite(temp2,1,length,fpwrite); delete temp2; fclose(fpwrite); cout<<"解密文件已经保存到!e:\\testA.txt"<<endl; cout<<" 1 AES 加密！ "<<endl; cout<<" 2 AES 解密！ "<<endl; cout<<" 3 计算文件MD5！"<<endl; cout<<" 4 退出！ "<<endl; cin>>n; } if(n=='3')//计算文件摘要MD5 { cout<<"计算摘要 : "<<endl; cout<<"请输入要计算摘要的文件路径："<<endl; cin>>path; while((fpread=fopen(path,"rb"))==NULL) { cout<<"文件打开失败，请检查文件名称或路径是否有错误!"<<endl; cout<<"请重新输入："<<endl; cin>>path; } fseek(fpread, 0, 2); long length = ftell(fpread); rewind(fpread); char *temp1 = new char [length]; char *temp2 = new char [length]; memset(temp1, 0, length); memset(temp2, 0, length); if (!temp1) { MessageBox(NULL,"Allocating fail","",0); } else { try { fread(temp1,1,length,fpread);//将文件中的内容读入一个临时数组 } catch(char *e) //捕获异常 { cout<<e<<"读取文件打开失败"<<endl; fclose(fpread); delete temp1; } hash((char *)temp1,length,(char *)temp2);// 计算文件摘要 //decAES((char *)temp1,length,aeskey,(char *)temp2);//加密和解密使用相同的密钥 } delete temp1; fclose(fpread); cout<<"文件摘要计算成功!"<<endl; fpwrite=fopen("e:\\MD5.txt","wb+"); fwrite(temp2,1,length,fpwrite); delete temp2; fclose(fpwrite); cout<<"摘要文件已经保存到!e:\\MD5.txt"<<endl; cout<<" 1 AES 加密！ "<<endl; cout<<" 2 AES 解密！ "<<endl; cout<<" 3 计算文件MD5！"<<endl; cout<<" 4 退出！ "<<endl; cin>>n; } if (n=='4')//退出 { exit(0); } } }