X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/fda04d7d7e5544d24e3bb0bc25c8f04a342136d2..495795e1042da83d07e68e13e0b570c8cc619d24:/ssh-keyscan.c

diff --git a/ssh-keyscan.c b/ssh-keyscan.c
index 9fa8aaeb..7dffb851 100644
--- a/ssh-keyscan.c
+++ b/ssh-keyscan.c
@@ -7,7 +7,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh-keyscan.c,v 1.44 2003/06/28 16:23:06 deraadt Exp $");
+RCSID("$OpenBSD: ssh-keyscan.c,v 1.54 2005/05/24 17:32:44 avsm Exp $");
 
 #include "openbsd-compat/sys-queue.h"
 
@@ -28,6 +28,7 @@ RCSID("$OpenBSD: ssh-keyscan.c,v 1.44 2003/06/28 16:23:06 deraadt Exp $");
 #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. */
@@ -41,6 +42,8 @@ int ssh_port = SSH_DEFAULT_PORT;
 
 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 */
@@ -49,11 +52,7 @@ int timeout = 5;
 int maxfd;
 #define MAXCON (maxfd - 10)
 
-#ifdef HAVE___PROGNAME
 extern char *__progname;
-#else
-char *__progname;
-#endif
 fd_set *read_wait;
 size_t read_wait_size;
 int ncon;
@@ -214,13 +213,11 @@ fdlim_get(int hard)
 	if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
 		return (-1);
 	if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
-		return 10000;
+		return SSH_SYSFDMAX;
 	else
 		return hard ? rlfd.rlim_max : rlfd.rlim_cur;
-#elif defined (HAVE_SYSCONF)
-	return sysconf (_SC_OPEN_MAX);
 #else
-	return 10000;
+	return SSH_SYSFDMAX;
 #endif
 }
 
@@ -351,6 +348,7 @@ keygrab_ssh2(con *c)
 	    "ssh-dss": "ssh-rsa";
 	c->c_kex = kex_setup(myproposal);
 	c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
+	c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
 	c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
 	c->c_kex->verify_host_key = hostjump;
 
@@ -371,10 +369,14 @@ keygrab_ssh2(con *c)
 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);
 }
@@ -398,8 +400,8 @@ tcpconnect(char *host)
 			error("socket: %s", strerror(errno));
 			continue;
 		}
-		if (fcntl(s, F_SETFL, O_NONBLOCK) < 0)
-			fatal("F_SETFL: %s", strerror(errno));
+		if (set_nonblock(s) == -1)
+			fatal("%s: set_nonblock(%d)", __func__, s);
 		if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
 		    errno != EINPROGRESS)
 			error("connect (`%s'): %s", host, strerror(errno));
@@ -491,27 +493,30 @@ conrecycle(int s)
 static void
 congreet(int s)
 {
-	int remote_major, remote_minor, 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 = buf;
-	while (bufsiz-- && (n = read(s, cp, 1)) == 1 && *cp != '\n') {
+	while (bufsiz-- && (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
 		if (*cp == '\r')
 			*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;
 	}
@@ -541,6 +546,11 @@ congreet(int s)
 	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);
@@ -559,14 +569,14 @@ static void
 conread(int s)
 {
 	con *c = &fdcon[s];
-	int n;
+	size_t n;
 
 	if (c->c_status == CS_CON) {
 		congreet(s);
 		return;
 	}
-	n = read(s, c->c_data + c->c_off, c->c_len - c->c_off);
-	if (n < 0) {
+	n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
+	if (n == 0) {
 		error("read (%s): %s", c->c_name, strerror(errno));
 		confree(s);
 		return;
@@ -675,13 +685,13 @@ fatal(const char *fmt,...)
 	if (nonfatal_fatal)
 		longjmp(kexjmp, -1);
 	else
-		fatal_cleanup();
+		exit(255);
 }
 
 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);
@@ -705,8 +715,11 @@ main(int argc, char **argv)
 	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) {