/*
libssh is available at http://www.libssh.org
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_ssh() { printf("\n"); }
#else
#include <libssh/libssh.h>
#if LIBSSH_VERSION_MAJOR == 0 && LIBSSH_VERSION_MINOR >= 4
ssh_session session = NULL;
extern hydra_option hydra_options;
extern char *HYDRA_EXIT;
int32_t new_session = 1;
int32_t start_ssh(int32_t s, char *ip, int32_t port, unsigned char options, char *miscptr, FILE *fp) {
char *empty = "";
char *login, *pass, keep_login[300];
int32_t auth_state = 0, rc = 0, i = 0;
if (strlen(login = hydra_get_next_login()) == 0)
login = empty;
if (strlen(pass = hydra_get_next_password()) == 0)
pass = empty;
if (new_session) {
if (session) {
ssh_disconnect(session);
// ssh_finalize();
ssh_free(session);
} else {
ssh_init();
}
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_TIMEOUT, &hydra_options.waittime);
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: %s\n", port, ssh_get_error(session));
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, "ssh", 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_PASSWORD) > 0) {
auth_state = ssh_userauth_password(session, NULL, pass);
} else if ((auth_state & SSH_AUTH_METHOD_INTERACTIVE) > 0) {
auth_state = ssh_userauth_kbdint(session, NULL, NULL);
while (auth_state == SSH_AUTH_INFO) {
rc = ssh_userauth_kbdint_getnprompts(session);
for (i = 0; i < rc; i++)
ssh_userauth_kbdint_setanswer(session, i, pass);
auth_state = ssh_userauth_kbdint(session, NULL, NULL);
}
} else {
return 4;
}
if (auth_state == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
new_session = 1;
return 1;
}
if (auth_state == SSH_AUTH_SUCCESS || auth_state == SSH_AUTH_PARTIAL) {
hydra_report_found_host(port, ip, "ssh", 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_ssh(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 (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_ssh(sock, ip, port, options, miscptr, fp);
break;
case 2:
ssh_disconnect(session);
ssh_finalize();
ssh_free(session);
hydra_child_exit(0);
break;
case 3:
ssh_disconnect(session);
ssh_finalize();
ssh_free(session);
if (verbose)
fprintf(stderr, "[ERROR] ssh protocol error\n");
hydra_child_exit(2);
break;
case 4:
ssh_disconnect(session);
ssh_finalize();
ssh_free(session);
fprintf(stderr, "[ERROR] ssh target does not support password auth\n");
hydra_child_exit(2);
break;
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
//
// dirty workaround here: miscptr is the ptr to the logins, and the first one is
// used to test if password authentication is enabled!!
//
int32_t service_ssh_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 skip target without generating an error
// 2 skip target because of protocol problems
// 3 skip target because its unreachable
#ifdef LIBSSH
int32_t rc, method;
ssh_init();
ssh_session session = ssh_new();
if (verbose || debug)
printf("[INFO] Testing if password authentication is supported by "
"ssh://%s@%s:%d\n",
miscptr == NULL ? "hydra" : miscptr, hydra_address2string_beautiful(ip), port);
ssh_options_set(session, SSH_OPTIONS_PORT, &port);
ssh_options_set(session, SSH_OPTIONS_HOST, hydra_address2string(ip));
if (miscptr == NULL)
ssh_options_set(session, SSH_OPTIONS_USER, "hydra");
else
ssh_options_set(session, SSH_OPTIONS_USER, miscptr);
ssh_options_set(session, SSH_OPTIONS_TIMEOUT, &hydra_options.waittime);
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) {
fprintf(stderr, "[ERROR] could not connect to ssh://%s:%d - %s\n", hydra_address2string_beautiful(ip), port, ssh_get_error(session));
return 2;
}
rc = ssh_userauth_none(session, NULL);
method = ssh_userauth_list(session, NULL);
ssh_disconnect(session);
ssh_finalize();
ssh_free(session);
if (debug)
printf("[DEBUG] SSH method check: %08x\n", method);
if ((method & SSH_AUTH_METHOD_INTERACTIVE) || (method & SSH_AUTH_METHOD_PASSWORD)) {
if (verbose || debug)
printf("[INFO] Successful, password authentication is supported by "
"ssh://%s:%d\n",
hydra_address2string_beautiful(ip), port);
return 0;
} else if (method == 0) {
if (verbose || debug)
fprintf(stderr,
"[WARNING] invalid SSH method reply from ssh://%s:%d, continuing "
"anyway ... (check for empty password!)\n",
hydra_address2string_beautiful(ip), port);
return 0;
}
fprintf(stderr,
"[ERROR] target ssh://%s:%d/ does not support password "
"authentication (method reply %d).\n",
hydra_address2string_beautiful(ip), port, method);
return 1;
#else
return 0;
#endif
}
