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/*
* BIRD -- An implementation of the SSH protocol for the RPKI transport
*
* (c) 2015 CZ.NIC
* (c) 2015 Pavel Tvrdik <pawel.tvrdik@gmail.com>
*
* This file was a part of RTRlib: http://rpki.realmv6.org/
* This transport implementation uses libssh (http://www.libssh.org/)
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "rpki.h"
#if HAVE_LIBSSH
static int
rpki_tr_ssh_open(struct rpki_tr_sock *tr)
{
struct rpki_cache *cache = tr->cache;
struct rpki_config *cf = (void *) cache->p->p.cf;
struct rpki_tr_ssh_config *ssh_cf = (void *) cf->tr_config.spec;
sock *sk = tr->sk;
sk->type = SK_SSH_ACTIVE;
sk->ssh = mb_allocz(sk->pool, sizeof(struct ssh_sock));
sk->ssh->username = ssh_cf->user;
sk->ssh->client_privkey_path = ssh_cf->bird_private_key;
sk->ssh->server_hostkey_path = ssh_cf->cache_public_key;
sk->ssh->subsystem = "rpki-rtr";
sk->ssh->state = SK_SSH_CONNECT;
if (sk_open(sk) != 0)
return RPKI_TR_ERROR;
return RPKI_TR_SUCCESS;
}
static const char *
rpki_tr_ssh_ident(struct rpki_tr_sock *tr)
{
struct rpki_cache *cache = tr->cache;
struct rpki_config *cf = (void *) cache->p->p.cf;
struct rpki_tr_ssh_config *ssh_cf = (void *) cf->tr_config.spec;
const char *username = ssh_cf->user;
if (tr->ident != NULL)
return tr->ident;
/* Length: <user> + '@' + <host> + ' port ' + <port> + '\0' */
size_t len = strlen(username) + 1 + strlen(cf->hostname) + 1 + 5 + 1;
char *ident = mb_alloc(cache->pool, len);
bsnprintf(ident, len, "%s@%s:%u", username, cf->hostname, cf->port);
tr->ident = ident;
return tr->ident;
}
/**
* rpki_tr_ssh_init - initializes the RPKI transport structure for a SSH connection
* @tr: allocated RPKI transport structure
*/
void
rpki_tr_ssh_init(struct rpki_tr_sock *tr)
{
tr->open_fp = &rpki_tr_ssh_open;
tr->ident_fp = &rpki_tr_ssh_ident;
}
#endif
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