initial commit

hydra-socks5.c

@@ -0,0 +1,180 @@
+#include "hydra-mod.h"
+
+/*
+
+RFC: 1928
+This module enable bruteforcing for socks5, only following types are supported:
+0x00 "No Authentication Required"
+0x02 "Username/Password"
+
+*/
+
+extern char *HYDRA_EXIT;
+unsigned char *buf;
+
+int fail_cnt;
+
+int start_socks5(int s, char *ip, int port, unsigned char options, char *miscptr, FILE * fp) {
+  char *empty = "";
+  char *login, *pass, buffer[300];
+  int pport, fud = 0;
+
+  if (strlen(login = hydra_get_next_login()) == 0)
+    login = empty;
+  if (strlen(pass = hydra_get_next_password()) == 0)
+    pass = empty;
+
+  memcpy(buffer, "\x05\x02\x00\x02", 4);
+  if (hydra_send(s, buffer, 4, 0) < 0) {
+    return 1;
+  }
+  if ((buf = (unsigned char *) hydra_receive_line(s)) == NULL) {
+    fail_cnt++;
+    if (fail_cnt >= 10)
+      return 5;
+    return (1);
+  }
+
+  fail_cnt = 0;
+  if (buf[0] != 5) {
+    if (buf[0] == 4) {
+      hydra_report(stderr, "[ERROR] Sorry Socks4 / Socks4a ident is not supported\n");
+    } else {
+      hydra_report(stderr, "[ERROR] Socks5 protocol or service shutdown: %s\n", buf);
+    }
+    free(buf);
+    return (4);
+  }
+  if (buf[1] == 0 || buf[1] == 32) {
+    hydra_report(stderr, "[INFO] Socks5 server does NOT require any authentication!\n");
+    free(buf);
+    return (4);
+  }
+  if (buf[1] != 0x2) {
+    hydra_report(stderr, "[ERROR] Socks5 protocol or service shutdown: %s\n", buf);
+    free(buf);
+    return (4);
+  }
+  free(buf);
+
+/* RFC 1929
+  For username/password authentication the client's authentication request is
+  field 1: version number, 1 byte (must be 0x01)
+*/
+  snprintf(buffer, sizeof(buffer), "\x01%c%s%c%s", (char) strlen(login), login, (char) strlen(pass), pass);
+
+  if (hydra_send(s, buffer, strlen(buffer), 0) < 0)
+    return 1;
+
+  if ((buf = (unsigned char *) hydra_receive_line(s)) == NULL)
+    return (1);
+
+  if (buf[1] != 255) {
+    /* new: false positive check */
+    free(buf);
+    pport = htons(port);
+    if (ip[0] == 16) {
+      memcpy(buffer, "\x05\x01\x00\x04", 4);
+      memcpy(buffer + 4, &ip[1], 16);
+      memcpy(buffer + 20, &pport, 2);
+      hydra_send(s, buffer, 22, 0);
+    } else {
+      memcpy(buffer, "\x05\x01\x00\x01", 4);
+      memcpy(buffer + 4, &ip[1], 4);
+      memcpy(buffer + 8, &pport, 2);
+      hydra_send(s, buffer, 10, 0);
+    }
+    if ((buf = (unsigned char *) hydra_receive_line(s)) != NULL) {
+      if (buf[1] == 0 || buf[1] == 32) {
+        hydra_report_found_host(port, ip, "socks5", fp);
+        hydra_completed_pair_found();
+        fud = 1;
+      } else if (buf[1] != 2) {
+        hydra_report_found_host_msg(port, ip, "socks5", fp, "might be a false positive!");
+      }
+    }
+  }
+  if (buf != NULL)
+    free(buf);
+  if (fud == 0)
+    hydra_completed_pair();
+  if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+    return 3;
+
+  return 2;
+}
+
+void service_socks5(char *ip, int sp, unsigned char options, char *miscptr, FILE * fp, int port) {
+  int run = 1, next_run = 1, sock = -1;
+  int myport = PORT_SOCKS5, mysslport = PORT_SOCKS5_SSL;
+
+  hydra_register_socket(sp);
+  if (port != 0)
+    myport = port;
+  if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+    return;
+
+  while (1) {
+    switch (run) {
+    case 1:                    /* connect and service init function */
+      if (sock >= 0)
+        sock = hydra_disconnect(sock);
+//      usleep(300000);
+      if ((options & OPTION_SSL) == 0) {
+        if (port != 0)
+          myport = port;
+        sock = hydra_connect_tcp(ip, myport);
+        port = myport;
+      } else {
+        if (port != 0)
+          mysslport = port;
+        sock = hydra_connect_ssl(ip, mysslport);
+        port = mysslport;
+      }
+      if (sock < 0) {
+        if (verbose || debug)
+          hydra_report(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_socks5(sock, ip, port, options, miscptr, fp);
+      break;
+    case 3:                    /* clean exit */
+      if (sock >= 0)
+        sock = hydra_disconnect(sock);
+      hydra_child_exit(0);
+      return;
+    case 4:                    /* clean exit */
+      if (sock >= 0)
+        sock = hydra_disconnect(sock);
+      hydra_child_exit(2);
+      return;
+    case 5:                    /* clean exit, server may blocking connections */
+      hydra_report(stderr, "[ERROR] Server may blocking connections\n");
+      if (sock >= 0)
+        sock = hydra_disconnect(sock);
+      hydra_child_exit(2);
+      return;
+    default:
+      hydra_report(stderr, "[ERROR] Caught unknown return code, exiting!\n");
+      hydra_child_exit(0);
+    }
+    run = next_run;
+  }
+}
+
+int service_socks5_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;
+}