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/*
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 hydra_option hydra_options;
extern char *HYDRA_EXIT;
extern int32_t new_session;
int32_t start_sshkey(int32_t s, char *ip, int32_t port, unsigned char options, char *miscptr, FILE *fp) {
char *empty = "";
char *login, *key, keep_login[300];
int32_t auth_state = 0, rc = 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_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_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, 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_sshkey(sock, ip, port, options, miscptr, fp);
if (next_run == 1 && hydra_options.conwait)
sleep(hydra_options.conwait);
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);
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 pubkey 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 at least v0.4.x. Download from http://www.libssh.org and add -DWITH_SSH1=On in cmake to enable SSH v1 support"
#endif
#endif
int32_t service_sshkey_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;
}
void usage_sshkey(const char *service) {
printf("Module sshkey does not provide additional options, although the "
"semantic for\n"
"options -p and -P is changed:\n"
" -p expects a path to an unencrypted private key in PEM format.\n"
" -P expects a filename containing a list of path to some unencrypted\n"
" private keys in PEM format.\n\n");
}
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