7293 Sun Secure Shell is neither

Reviewed by: Albert Lee <trisk@omniti.com>
Reviewed by: Alex Wilson <alex.wilson@joyent.com>
Reviewed by: Alexander Pyhalov <alp@rsu.ru>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>

1 files changed, 0 insertions, 325 deletions

diff --git a/usr/src/cmd/ssh/libssh/common/kexgssc.c b/usr/src/cmd/ssh/libssh/common/kexgssc.c
deleted file mode 100644
index 60c91ed57b..0000000000
--- a/usr/src/cmd/ssh/libssh/common/kexgssc.c
+++ /dev/null
@@ -1,325 +0,0 @@
-/*
- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-/*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
-
-#include "includes.h"
-
-#ifdef GSSAPI
-
-#include <openssl/crypto.h>
-#include <openssl/bn.h>
-
-#include "xmalloc.h"
-#include "buffer.h"
-#include "bufaux.h"
-#include "kex.h"
-#include "log.h"
-#include "packet.h"
-#include "dh.h"
-#include "canohost.h"
-#include "ssh2.h"
-#include "ssh-gss.h"
-
-extern char *xxx_host;
-
-Gssctxt *xxx_gssctxt;
-
-static void kexgss_verbose_cleanup(void *arg);
-
-void
-kexgss_client(Kex *kex)
-{
-	gss_buffer_desc gssbuf, send_tok, recv_tok, msg_tok;
-	gss_buffer_t token_ptr;
-	gss_OID mech = GSS_C_NULL_OID;
-	Gssctxt *ctxt = NULL;
-	OM_uint32 maj_status, min_status, smaj_status, smin_status;
-	unsigned int klen, kout;
-	DH *dh;
-	BIGNUM *dh_server_pub = 0;
-	BIGNUM *shared_secret = 0;
-	Key *server_host_key = NULL;
-	unsigned char *kbuf;
-	unsigned char *hash;
-	unsigned char *server_host_key_blob = NULL;
-	char *msg, *lang;
-	int type = 0;
-	int first = 1;
-	uint_t sbloblen = 0;
-	uint_t strlen;
-
-	/* Map the negotiated kex name to a mech OID */
-	ssh_gssapi_oid_of_kexname(kex->name, &mech);
-	if (mech == GSS_C_NULL_OID)
-		fatal("Couldn't match the negotiated GSS key exchange");
-
-	ssh_gssapi_build_ctx(&ctxt, 1, mech);
-
-	/* This code should match that in ssh_dh1_client */
-
-	/* Step 1 - e is dh->pub_key */
-	dh = dh_new_group1();
-	dh_gen_key(dh, kex->we_need * 8);
-
-	/* This is f, we initialise it now to make life easier */
-	dh_server_pub = BN_new();
-	if (dh_server_pub == NULL) {
-		fatal("dh_server_pub == NULL");
-	}
-
-	token_ptr = GSS_C_NO_BUFFER;
-
-	recv_tok.value = NULL;
-	recv_tok.length = 0;
-
-	do {
-		debug("Calling gss_init_sec_context");
-
-		maj_status = ssh_gssapi_init_ctx(ctxt, xxx_host,
-		    kex->options.gss_deleg_creds, token_ptr, &send_tok);
-
-		if (GSS_ERROR(maj_status)) {
-			ssh_gssapi_error(ctxt, "performing GSS-API protected "
-			    "SSHv2 key exchange");
-			(void) gss_release_buffer(&min_status, &send_tok);
-			packet_disconnect("A GSS-API error occurred during "
-			    "GSS-API protected SSHv2 key exchange\n");
-		}
-
-		/* If we've got an old receive buffer get rid of it */
-		if (token_ptr != GSS_C_NO_BUFFER) {
-			/* We allocated recv_tok */
-			xfree(recv_tok.value);
-			recv_tok.value = NULL;
-			recv_tok.length = 0;
-			token_ptr = GSS_C_NO_BUFFER;
-		}
-
-		if (maj_status == GSS_S_COMPLETE) {
-			/* If mutual state flag is not true, kex fails */
-			if (!(ctxt->flags & GSS_C_MUTUAL_FLAG)) {
-				fatal("Mutual authentication failed");
-			}
-			/* If integ avail flag is not true kex fails */
-			if (!(ctxt->flags & GSS_C_INTEG_FLAG)) {
-				fatal("Integrity check failed");
-			}
-		}
-
-		/*
-		 * If we have data to send, then the last message that we
-		 * received cannot have been a 'complete'.
-		 */
-		if (send_tok.length != 0) {
-			if (first) {
-				packet_start(SSH2_MSG_KEXGSS_INIT);
-				packet_put_string(send_tok.value,
-				    send_tok.length);
-				packet_put_bignum2(dh->pub_key);
-				first = 0;
-			} else {
-				packet_start(SSH2_MSG_KEXGSS_CONTINUE);
-				packet_put_string(send_tok.value,
-				    send_tok.length);
-			}
-			(void) gss_release_buffer(&min_status, &send_tok);
-			packet_send();
-			packet_write_wait();
-
-
-			/*
-			 * If we've sent them data, they'd better be polite and
-			 * reply.
-			 */
-
-next_packet:
-			/*
-			 * We need to catch connection closing w/o error
-			 * tokens or messages so we can tell the user
-			 * _something_ more useful than "Connection
-			 * closed by ..."
-			 *
-			 * We use a fatal cleanup function as that's
-			 * all, really, that we can do for now.
-			 */
-			fatal_add_cleanup(kexgss_verbose_cleanup, NULL);
-			type = packet_read();
-			fatal_remove_cleanup(kexgss_verbose_cleanup, NULL);
-			switch (type) {
-			case SSH2_MSG_KEXGSS_HOSTKEY:
-				debug("Received KEXGSS_HOSTKEY");
-				server_host_key_blob =
-				    packet_get_string(&sbloblen);
-				server_host_key =
-				    key_from_blob(server_host_key_blob,
-				    sbloblen);
-				goto next_packet; /* there MUSt be another */
-				break;
-			case SSH2_MSG_KEXGSS_CONTINUE:
-				debug("Received GSSAPI_CONTINUE");
-				if (maj_status == GSS_S_COMPLETE)
-					packet_disconnect("Protocol error: "
-					    "received GSS-API context token "
-					    "though the context was already "
-					    "established");
-				recv_tok.value = packet_get_string(&strlen);
-				recv_tok.length = strlen; /* u_int vs. size_t */
-				break;
-			case SSH2_MSG_KEXGSS_COMPLETE:
-				debug("Received GSSAPI_COMPLETE");
-				packet_get_bignum2(dh_server_pub);
-				msg_tok.value = packet_get_string(&strlen);
-				msg_tok.length = strlen; /* u_int vs. size_t */
-
-				/* Is there a token included? */
-				if (packet_get_char()) {
-					recv_tok.value =
-					    packet_get_string(&strlen);
-					/* u_int/size_t */
-					recv_tok.length = strlen;
-				}
-				if (recv_tok.length > 0 &&
-				    maj_status == GSS_S_COMPLETE) {
-					packet_disconnect("Protocol error: "
-					    "received GSS-API context token "
-					    "though the context was already "
-					    "established");
-				} else if (recv_tok.length == 0 &&
-				    maj_status == GSS_S_CONTINUE_NEEDED) {
-					/* No token included */
-					packet_disconnect("Protocol error: "
-					    "did not receive expected "
-					    "GSS-API context token");
-				}
-				break;
-			case SSH2_MSG_KEXGSS_ERROR:
-				smaj_status = packet_get_int();
-				smin_status = packet_get_int();
-				msg = packet_get_string(NULL);
-				lang = packet_get_string(NULL);
-				xfree(lang);
-				error("Server had a GSS-API error; the "
-				    "connection will close (%d/%d):\n%s",
-				    smaj_status, smin_status, msg);
-				error("Use the GssKeyEx option to disable "
-				    "GSS-API key exchange and try again.");
-				packet_disconnect("The server had a GSS-API "
-				    "error during GSS-API protected SSHv2 "
-				    "key exchange\n");
-				break;
-			default:
-				packet_disconnect("Protocol error: "
-				    "didn't expect packet type %d", type);
-			}
-			if (recv_tok.value)
-				token_ptr = &recv_tok;
-		} else {
-			/* No data, and not complete */
-			if (maj_status != GSS_S_COMPLETE) {
-				fatal("Not complete, and no token output");
-			}
-		}
-	} while (maj_status == GSS_S_CONTINUE_NEEDED);
-
-	/*
-	 * We _must_ have received a COMPLETE message in reply from the
-	 * server, which will have set dh_server_pub and msg_tok.
-	 */
-	if (type != SSH2_MSG_KEXGSS_COMPLETE)
-		fatal("Expected SSH2_MSG_KEXGSS_COMPLETE never arrived");
-	if (maj_status != GSS_S_COMPLETE)
-		fatal("Internal error in GSS-API protected SSHv2 key exchange");
-
-	/* Check f in range [1, p-1] */
-	if (!dh_pub_is_valid(dh, dh_server_pub))
-		packet_disconnect("bad server public DH value");
-
-	/* compute K=f^x mod p */
-	klen = DH_size(dh);
-	kbuf = xmalloc(klen);
-	kout = DH_compute_key(kbuf, dh_server_pub, dh);
-
-	shared_secret = BN_new();
-	BN_bin2bn(kbuf, kout, shared_secret);
-	(void) memset(kbuf, 0, klen);
-	xfree(kbuf);
-
-	/* The GSS hash is identical to the DH one */
-	hash = kex_dh_hash(
-	    kex->client_version_string,
-	    kex->server_version_string,
-	    buffer_ptr(&kex->my), buffer_len(&kex->my),
-	    buffer_ptr(&kex->peer), buffer_len(&kex->peer),
-	    server_host_key_blob, sbloblen, /* server host key */
-	    dh->pub_key,	/* e */
-	    dh_server_pub,	/* f */
-	    shared_secret);	/* K */
-
-	gssbuf.value = hash;
-	gssbuf.length = 20;
-
-	/* Verify that H matches the token we just got. */
-	if ((maj_status = gss_verify_mic(&min_status, ctxt->context, &gssbuf,
-	    &msg_tok, NULL))) {
-		packet_disconnect("Hash's MIC didn't verify");
-	}
-
-	if (server_host_key && kex->accept_host_key != NULL)
-		(void) kex->accept_host_key(server_host_key);
-
-	DH_free(dh);
-
-	xxx_gssctxt = ctxt; /* for gss keyex w/ mic userauth */
-
-	/* save session id */
-	if (kex->session_id == NULL) {
-		kex->session_id_len = 20;
-		kex->session_id = xmalloc(kex->session_id_len);
-		(void) memcpy(kex->session_id, hash, kex->session_id_len);
-	}
-
-	kex_derive_keys(kex, hash, shared_secret);
-	BN_clear_free(shared_secret);
-	kex_finish(kex);
-}
-
-/* ARGSUSED */
-static
-void
-kexgss_verbose_cleanup(void *arg)
-{
-	error("The GSS-API protected key exchange has failed without "
-	    "indication\nfrom the server, possibly due to misconfiguration "
-	    "of the server.");
-	error("Use the GssKeyEx option to disable GSS-API key exchange "
-	    "and try again.");
-}
-
-#endif /* GSSAPI */