initial commit

hydra-sshkey.c

@@ -0,0 +1,166 @@
+
+/*
+ libssh is available at http://www.libssh.org
+ current version is 0.4.8 
+ If you want support for ssh v1 protocol, you
+ have to add option -DWITH_SSH1=On in the cmake
+*/
+
+#include "hydra-mod.h"
+#ifndef LIBSSH
+void dummy_sshkey() {
+  printf("\n");
+}
+#else
+
+#include <libssh/libssh.h>
+
+#if LIBSSH_VERSION_MAJOR == 0 && LIBSSH_VERSION_MINOR >= 4
+
+extern ssh_session session;
+extern char *HYDRA_EXIT;
+extern int new_session;
+
+int start_sshkey(int s, char *ip, int port, unsigned char options, char *miscptr, FILE * fp) {
+  char *empty = "";
+  char *login, *key, keep_login[300];
+  int auth_state = 0, rc = 0, i = 0;
+  ssh_private_key privkey;
+
+  if (strlen(login = hydra_get_next_login()) == 0)
+    login = empty;
+  if (strlen(key = hydra_get_next_password()) == 0)
+    key = empty;
+
+  if (new_session) {
+    if (session) {
+      ssh_disconnect(session);
+      ssh_finalize();
+      ssh_free(session);
+    }
+
+    session = ssh_new();
+    ssh_options_set(session, SSH_OPTIONS_PORT, &port);
+    ssh_options_set(session, SSH_OPTIONS_HOST, hydra_address2string(ip));
+    ssh_options_set(session, SSH_OPTIONS_USER, login);
+    ssh_options_set(session, SSH_OPTIONS_COMPRESSION_C_S, "none");
+    ssh_options_set(session, SSH_OPTIONS_COMPRESSION_S_C, "none");
+    if (ssh_connect(session) != 0) {
+      //if the connection was drop, exit and let hydra main handle it
+      if (verbose)
+        hydra_report(stderr, "[ERROR] could not connect to target port %d\n", port);
+      return 3;
+    }
+
+    if ((rc = ssh_userauth_none(session, NULL)) == SSH_AUTH_ERROR) {
+      return 3;
+    } else if (rc == SSH_AUTH_SUCCESS) {
+      hydra_report_found_host(port, ip, "sshkey", fp);
+      hydra_completed_pair_found();
+      if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+        return 2;
+      else
+        return 1;
+    }
+  } else
+    new_session = 1;
+
+  auth_state = ssh_auth_list(session);
+  if ((auth_state & SSH_AUTH_METHOD_PUBLICKEY) > 0) {
+    privkey = privatekey_from_file(session, key, 0, NULL);
+    if (!privkey) {
+      hydra_report(stderr, "[ERROR] skipping invalid private key: \"%s\"\n", key);
+      hydra_completed_pair();
+      if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+        return 2;
+
+      return 1;
+    }
+    auth_state = ssh_userauth_pubkey(session, NULL, NULL, privkey);
+  } else {
+    return 4;
+  }
+
+  if (auth_state == SSH_AUTH_ERROR) {
+    new_session = 1;
+    return 1;
+  }
+
+  if (auth_state == SSH_AUTH_SUCCESS || auth_state == SSH_AUTH_PARTIAL) {
+    hydra_report_found_host(port, ip, "sshkey", fp);
+    hydra_completed_pair_found();
+    if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+      return 2;
+    return 1;
+  } else {
+    strncpy(keep_login, login, sizeof(keep_login) - 1);
+    keep_login[sizeof(keep_login) - 1] = '\0';
+    hydra_completed_pair();
+    if (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+      return 2;
+    login = hydra_get_next_login();
+    if (strcmp(login, keep_login) == 0)
+      new_session = 0;
+    return 1;
+  }
+
+  /* not reached */
+  return 1;
+}
+
+void service_sshkey(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 (memcmp(hydra_get_next_pair(), &HYDRA_EXIT, sizeof(HYDRA_EXIT)) == 0)
+    return;
+  while (1) {
+    switch (run) {
+    case 1:                    /* connect and service init function */
+      next_run = start_sshkey(sock, ip, port, options, miscptr, fp);
+      break;
+    case 2:
+      ssh_disconnect(session);
+      ssh_finalize();
+      ssh_free(session);
+      hydra_child_exit(0);
+    case 3:
+      ssh_disconnect(session);
+      ssh_finalize();
+      ssh_free(session);
+      fprintf(stderr, "[ERROR] ssh protocol error\n");
+      hydra_child_exit(2);
+    case 4:
+      ssh_disconnect(session);
+      ssh_finalize();
+      ssh_free(session);
+      fprintf(stderr, "[ERROR] ssh target does not support pubkey auth\n");
+      hydra_child_exit(2);
+    default:
+      ssh_disconnect(session);
+      ssh_finalize();
+      ssh_free(session);
+      hydra_report(stderr, "[ERROR] Caught unknown return code, exiting!\n");
+      hydra_child_exit(2);
+    }
+    run = next_run;
+  }
+}
+#else
+#error "You are not using v0.4.x. Download from http://www.libssh.org and add -DWITH_SSH1=On in cmake to enable SSH v1 support"
+#endif
+#endif
+
+int service_sshkey_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;
+}