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- stevesk@cvs.openbsd.org 2001/11/30 20:39:28

Browse Source 
[ssh.c]
     sscanf() length dependencies are clearer now; can also shrink proto
     and data if desired, but i have not done that.  ok markus@
This commit is contained in:
Ben Lindstrom 2001-12-06 17:45:19 +00:00
parent 57fe5b592c
commit 4a4bd719ea
2 changed files with 18 additions and 10 deletions
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6
ChangeLog
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@ -40,6 +40,10 @@
fix protocol error: send 'failed' message instead of a 2nd challenge fix protocol error: send 'failed' message instead of a 2nd challenge
(happens if the same key is in authorized_keys twice). (happens if the same key is in authorized_keys twice).
reported Ralf_Meister@genua.de; ok djm@ reported Ralf_Meister@genua.de; ok djm@
- stevesk@cvs.openbsd.org 2001/11/30 20:39:28
[ssh.c]
sscanf() length dependencies are clearer now; can also shrink proto
and data if desired, but i have not done that. ok markus@
20011126 20011126
- (tim) [contrib/cygwin/README, openbsd-compat/bsd-cygwin_util.c, - (tim) [contrib/cygwin/README, openbsd-compat/bsd-cygwin_util.c,
@ -6962,4 +6966,4 @@
- Wrote replacements for strlcpy and mkdtemp - Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1 - Released 1.0pre1
$Id: ChangeLog,v 1.1678 2001/12/06 17:41:25 mouring Exp $ $Id: ChangeLog,v 1.1679 2001/12/06 17:45:19 mouring Exp $

22
ssh.c
View File

@ -39,7 +39,7 @@
*/ */
#include "includes.h" #include "includes.h"
RCSID("$OpenBSD: ssh.c,v 1.149 2001/10/24 08:51:35 markus Exp $"); RCSID("$OpenBSD: ssh.c,v 1.150 2001/11/30 20:39:28 stevesk Exp $");
#include <openssl/evp.h> #include <openssl/evp.h>
#include <openssl/err.h> #include <openssl/err.h>
@ -787,19 +787,23 @@ again:
} }
static void static void
x11_get_proto(char *proto, int proto_len, char *data, int data_len) x11_get_proto(char **_proto, char **_data)
{ {
char line[512]; char line[512];
static char proto[512], data[512];
FILE *f; FILE *f;
int got_data = 0, i; int got_data = 0, i;
*_proto = proto;
*_data = data;
proto[0] = data[0] = '\0';
if (options.xauth_location) { if (options.xauth_location) {
/* Try to get Xauthority information for the display. */ /* Try to get Xauthority information for the display. */
snprintf(line, sizeof line, "%.100s list %.200s 2>" _PATH_DEVNULL, snprintf(line, sizeof line, "%.100s list %.200s 2>" _PATH_DEVNULL,
options.xauth_location, getenv("DISPLAY")); options.xauth_location, getenv("DISPLAY"));
f = popen(line, "r"); f = popen(line, "r");
if (f && fgets(line, sizeof(line), f) && if (f && fgets(line, sizeof(line), f) &&
sscanf(line, "%*s %s %s", proto, data) == 2) sscanf(line, "%*s %511s %511s", proto, data) == 2)
got_data = 1; got_data = 1;
if (f) if (f)
pclose(f); pclose(f);
@ -815,11 +819,11 @@ x11_get_proto(char *proto, int proto_len, char *data, int data_len)
if (!got_data) { if (!got_data) {
u_int32_t rand = 0; u_int32_t rand = 0;
strlcpy(proto, "MIT-MAGIC-COOKIE-1", proto_len); strlcpy(proto, "MIT-MAGIC-COOKIE-1", sizeof proto);
for (i = 0; i < 16; i++) { for (i = 0; i < 16; i++) {
if (i % 4 == 0) if (i % 4 == 0)
rand = arc4random(); rand = arc4random();
snprintf(data + 2 * i, data_len - 2 * i, "%02x", rand & 0xff); snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", rand & 0xff);
rand >>= 8; rand >>= 8;
} }
} }
@ -943,9 +947,9 @@ ssh_session(void)
} }
/* Request X11 forwarding if enabled and DISPLAY is set. */ /* Request X11 forwarding if enabled and DISPLAY is set. */
if (options.forward_x11 && getenv("DISPLAY") != NULL) { if (options.forward_x11 && getenv("DISPLAY") != NULL) {
char proto[512], data[512]; char *proto, *data;
/* Get reasonable local authentication information. */ /* Get reasonable local authentication information. */
x11_get_proto(proto, sizeof proto, data, sizeof data); x11_get_proto(&proto, &data);
/* Request forwarding with authentication spoofing. */ /* Request forwarding with authentication spoofing. */
debug("Requesting X11 forwarding with authentication spoofing."); debug("Requesting X11 forwarding with authentication spoofing.");
x11_request_forwarding_with_spoofing(0, proto, data); x11_request_forwarding_with_spoofing(0, proto, data);
@ -1059,9 +1063,9 @@ ssh_session2_setup(int id, void *arg)
} }
if (options.forward_x11 && if (options.forward_x11 &&
getenv("DISPLAY") != NULL) { getenv("DISPLAY") != NULL) {
char proto[512], data[512]; char *proto, *data;
/* Get reasonable local authentication information. */ /* Get reasonable local authentication information. */
x11_get_proto(proto, sizeof proto, data, sizeof data); x11_get_proto(&proto, &data);
/* Request forwarding with authentication spoofing. */ /* Request forwarding with authentication spoofing. */
debug("Requesting X11 forwarding with authentication spoofing."); debug("Requesting X11 forwarding with authentication spoofing.");
x11_request_forwarding_with_spoofing(id, proto, data); x11_request_forwarding_with_spoofing(id, proto, data);