initial commit

hydra-pcnfs.c

@@ -0,0 +1,198 @@
+#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 ... */
+
+int start_pcnfs(int s, char *ip, int 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 http://www.thc.org - 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, int sp, unsigned char options, char *miscptr, FILE * fp, int port) {
+  int 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);
+//        usleep(275000);
+        if ((sock = hydra_connect_udp(ip, port)) < 0) {
+          fprintf(stderr, "[ERROR] Child with pid %d terminating, can not connect\n", (int) 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;
+  }
+}
+
+int service_pcnfs_init(char *ip, int sp, unsigned char options, char *miscptr, FILE * fp, int port) {
+  // 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;
+}