*/
#include "includes.h"
-RCSID("$OpenBSD: ssh-keyscan.c,v 1.50 2004/08/11 21:44:32 avsm Exp $");
+RCSID("$OpenBSD: ssh-keyscan.c,v 1.54 2005/05/24 17:32:44 avsm Exp $");
#include "openbsd-compat/sys-queue.h"
#include "log.h"
#include "atomicio.h"
#include "misc.h"
+#include "hostfile.h"
/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
Default value is AF_UNSPEC means both IPv4 and IPv6. */
int get_keytypes = KT_RSA1; /* Get only RSA1 keys by default */
+int hash_hosts = 0; /* Hash hostname on output */
+
#define MAXMAXFD 256
/* The number of seconds after which to give up on a TCP connection */
static void
keyprint(con *c, Key *key)
{
+ char *host = c->c_output_name ? c->c_output_name : c->c_name;
+
if (!key)
return;
+ if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
+ fatal("host_hash failed");
- fprintf(stdout, "%s ", c->c_output_name ? c->c_output_name : c->c_name);
+ fprintf(stdout, "%s ", host);
key_write(key, stdout);
fputs("\n", stdout);
}
static void
congreet(int s)
{
- int remote_major = 0, remote_minor = 0, n = 0;
+ int remote_major = 0, remote_minor = 0;
char buf[256], *cp;
char remote_version[sizeof buf];
- size_t bufsiz;
+ size_t bufsiz, n = 0;
con *c = &fdcon[s];
bufsiz = sizeof(buf);
*cp = '\n';
cp++;
}
- if (n < 0) {
- if (errno != ECONNREFUSED)
- error("read (%s): %s", c->c_name, strerror(errno));
- conrecycle(s);
- return;
- }
if (n == 0) {
- error("%s: Connection closed by remote host", c->c_name);
+ switch (errno) {
+ case EPIPE:
+ error("%s: Connection closed by remote host", c->c_name);
+ break;
+ case ECONNREFUSED:
+ break;
+ default:
+ error("read (%s): %s", c->c_name, strerror(errno));
+ break;
+ }
conrecycle(s);
return;
}
n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
+ if (n == -1 || n >= sizeof buf) {
+ error("snprintf: buffer too small");
+ confree(s);
+ return;
+ }
if (atomicio(vwrite, s, buf, n) != n) {
error("write (%s): %s", c->c_name, strerror(errno));
confree(s);
conread(int s)
{
con *c = &fdcon[s];
- int n;
+ size_t n;
if (c->c_status == CS_CON) {
congreet(s);
return;
}
n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
- if (n < 0) {
+ if (n == 0) {
error("read (%s): %s", c->c_name, strerror(errno));
confree(s);
return;
static void
usage(void)
{
- fprintf(stderr, "usage: %s [-v46] [-p port] [-T timeout] [-t type] [-f file]\n"
+ fprintf(stderr, "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n"
"\t\t [host | addrlist namelist] [...]\n",
__progname);
exit(1);
if (argc <= 1)
usage();
- while ((opt = getopt(argc, argv, "v46p:T:t:f:")) != -1) {
+ while ((opt = getopt(argc, argv, "Hv46p:T:t:f:")) != -1) {
switch (opt) {
+ case 'H':
+ hash_hosts = 1;
+ break;
case 'p':
ssh_port = a2port(optarg);
if (ssh_port == 0) {