* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
-RCSID("$OpenBSD: ssh-keysign.c,v 1.5 2002/06/26 22:27:32 markus Exp $");
+RCSID("$OpenBSD: ssh-keysign.c,v 1.7 2002/07/03 14:21:05 markus Exp $");
#include <openssl/evp.h>
+#include <openssl/rand.h>
+#include <openssl/rsa.h>
#include "log.h"
#include "key.h"
+#include "ssh.h"
#include "ssh2.h"
#include "misc.h"
#include "xmalloc.h"
#include "msg.h"
#include "canohost.h"
#include "pathnames.h"
+#include "readconf.h"
+
+uid_t original_real_uid; /* XXX readconf.c needs this */
#ifdef HAVE___PROGNAME
extern char *__progname;
main(int argc, char **argv)
{
Buffer b;
+ Options options;
Key *keys[2], *key;
struct passwd *pw;
int key_fd[2], i, found, version = 2, fd;
u_char *signature, *data;
char *host;
u_int slen, dlen;
+ u_int32_t rnd[256];
key_fd[0] = open(_PATH_HOST_RSA_KEY_FILE, O_RDONLY);
key_fd[1] = open(_PATH_HOST_DSA_KEY_FILE, O_RDONLY);
log_init("ssh-keysign", SYSLOG_LEVEL_DEBUG3, SYSLOG_FACILITY_AUTH, 0);
#endif
+ /* verify that ssh-keysign is enabled by the admin */
+ original_real_uid = getuid(); /* XXX readconf.c needs this */
+ initialize_options(&options);
+ (void)read_config_file(_PATH_HOST_CONFIG_FILE, "", &options);
+ fill_default_options(&options);
+ if (options.hostbased_authentication != 1)
+ fatal("Hostbased authentication not enabled in %s",
+ _PATH_HOST_CONFIG_FILE);
+
if (key_fd[0] == -1 && key_fd[1] == -1)
fatal("could not open any host key");
pw = pwcopy(pw);
SSLeay_add_all_algorithms();
+ for (i = 0; i < 256; i++)
+ rnd[i] = arc4random();
+ RAND_seed(rnd, sizeof(rnd));
found = 0;
for (i = 0; i < 2; i++) {
keys[i] = key_load_private_pem(key_fd[i], KEY_UNSPEC,
NULL, NULL);
close(key_fd[i]);
+ if (keys[i] != NULL && keys[i]->type == KEY_RSA) {
+ if (RSA_blinding_on(keys[i]->rsa, NULL) != 1) {
+ error("RSA_blinding_on failed");
+ key_free(keys[i]);
+ keys[i] = NULL;
+ }
+ }
if (keys[i] != NULL)
found = 1;
}