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Diffstat (limited to 'usr/src/cmd/ssh/libssh/common/kexgsss.c')
-rw-r--r--usr/src/cmd/ssh/libssh/common/kexgsss.c252
1 files changed, 0 insertions, 252 deletions
diff --git a/usr/src/cmd/ssh/libssh/common/kexgsss.c b/usr/src/cmd/ssh/libssh/common/kexgsss.c
deleted file mode 100644
index 9ee8b630bb..0000000000
--- a/usr/src/cmd/ssh/libssh/common/kexgsss.c
+++ /dev/null
@@ -1,252 +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 "compat.h"
-#include "kex.h"
-#include "log.h"
-#include "packet.h"
-#include "dh.h"
-#include "ssh2.h"
-#include "ssh-gss.h"
-#include "auth.h"
-
-Gssctxt *xxx_gssctxt;
-extern Authctxt *x_authctxt;
-
-static void kex_gss_send_error(Gssctxt *ctxt);
-
-void
-kexgss_server(Kex *kex)
-{
- OM_uint32 maj_status, min_status;
- gss_buffer_desc gssbuf, send_tok, recv_tok, msg_tok;
- Gssctxt *ctxt = NULL;
- unsigned int klen, kout;
- unsigned int sbloblen = 0;
- unsigned char *kbuf, *hash;
- unsigned char *server_host_key_blob = NULL;
- DH *dh;
- Key *server_host_key = NULL;
- BIGNUM *shared_secret = NULL;
- BIGNUM *dh_client_pub = NULL;
- int type = 0;
- uint_t slen;
- gss_OID oid;
-
- /*
- * Load host key to advertise in a SSH_MSG_KEXGSS_HOSTKEY packet
- * -- unlike KEX_DH/KEX_GEX no host key, no problem since it's
- * the GSS-API that provides for server host authentication.
- */
- if (kex->load_host_key != NULL &&
- !(datafellows & SSH_BUG_GSSKEX_HOSTKEY))
- server_host_key = kex->load_host_key(kex->hostkey_type);
- if (server_host_key != NULL)
- key_to_blob(server_host_key, &server_host_key_blob, &sbloblen);
-
-
- /* Initialise GSSAPI */
-
- ssh_gssapi_oid_of_kexname(kex->name, &oid);
- if (oid == GSS_C_NULL_OID) {
- fatal("Couldn't match the negotiated GSS key exchange");
- }
-
- ssh_gssapi_build_ctx(&xxx_gssctxt, 0, oid);
-
- ctxt = xxx_gssctxt;
-
- do {
- debug("Wait SSH2_MSG_GSSAPI_INIT");
- type = packet_read();
- switch (type) {
- case SSH2_MSG_KEXGSS_INIT:
- if (dh_client_pub != NULL)
- fatal("Received KEXGSS_INIT after "
- "initialising");
- recv_tok.value = packet_get_string(&slen);
- recv_tok.length = slen; /* int vs. size_t */
-
- dh_client_pub = BN_new();
-
- if (dh_client_pub == NULL)
- fatal("dh_client_pub == NULL");
- packet_get_bignum2(dh_client_pub);
-
- /* Send SSH_MSG_KEXGSS_HOSTKEY here, if we want */
- if (sbloblen) {
- packet_start(SSH2_MSG_KEXGSS_HOSTKEY);
- packet_put_string(server_host_key_blob,
- sbloblen);
- packet_send();
- packet_write_wait();
- }
- break;
- case SSH2_MSG_KEXGSS_CONTINUE:
- recv_tok.value = packet_get_string(&slen);
- recv_tok.length = slen; /* int vs. size_t */
- break;
- default:
- packet_disconnect("Protocol error: didn't expect "
- "packet type %d", type);
- }
-
- maj_status = ssh_gssapi_accept_ctx(ctxt, &recv_tok, &send_tok);
-
- xfree(recv_tok.value); /* We allocated this, not gss */
-
- if (dh_client_pub == NULL)
- fatal("No client public key");
-
- if (maj_status == GSS_S_CONTINUE_NEEDED) {
- debug("Sending GSSAPI_CONTINUE");
- packet_start(SSH2_MSG_KEXGSS_CONTINUE);
- packet_put_string(send_tok.value, send_tok.length);
- packet_send();
- packet_write_wait();
- (void) gss_release_buffer(&min_status, &send_tok);
- }
- } while (maj_status == GSS_S_CONTINUE_NEEDED);
-
- if (GSS_ERROR(maj_status)) {
- kex_gss_send_error(ctxt);
- if (send_tok.length > 0) {
- packet_start(SSH2_MSG_KEXGSS_CONTINUE);
- packet_put_string(send_tok.value, send_tok.length);
- packet_send();
- packet_write_wait();
- (void) gss_release_buffer(&min_status, &send_tok);
- }
- fatal("accept_ctx died");
- }
-
- debug("gss_complete");
- if (!(ctxt->flags & GSS_C_MUTUAL_FLAG))
- fatal("Mutual authentication flag wasn't set");
-
- if (!(ctxt->flags & GSS_C_INTEG_FLAG))
- fatal("Integrity flag wasn't set");
-
- dh = dh_new_group1();
- dh_gen_key(dh, kex->we_need * 8);
-
- if (!dh_pub_is_valid(dh, dh_client_pub))
- packet_disconnect("bad client public DH value");
-
- klen = DH_size(dh);
- kbuf = xmalloc(klen);
- kout = DH_compute_key(kbuf, dh_client_pub, dh);
-
- shared_secret = BN_new();
- BN_bin2bn(kbuf, kout, shared_secret);
- (void) memset(kbuf, 0, klen);
- xfree(kbuf);
-
- /* The GSSAPI hash is identical to the Diffie Helman one */
- hash = kex_dh_hash(
- kex->client_version_string,
- kex->server_version_string,
- buffer_ptr(&kex->peer), buffer_len(&kex->peer),
- buffer_ptr(&kex->my), buffer_len(&kex->my),
- server_host_key_blob, sbloblen,
- dh_client_pub,
- dh->pub_key,
- shared_secret);
-
- BN_free(dh_client_pub);
-
- 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);
- } else if (x_authctxt != NULL && x_authctxt->success) {
- ssh_gssapi_storecreds(ctxt, x_authctxt);
- }
-
- /* Should fix kex_dh_hash to output hash length */
- gssbuf.length = 20; /* yes, it's always 20 (SHA-1) */
- gssbuf.value = hash; /* and it's static constant storage */
-
- if (GSS_ERROR(ssh_gssapi_get_mic(ctxt, &gssbuf, &msg_tok))) {
- kex_gss_send_error(ctxt);
- fatal("Couldn't get MIC");
- }
-
- packet_start(SSH2_MSG_KEXGSS_COMPLETE);
- packet_put_bignum2(dh->pub_key);
- packet_put_string((char *)msg_tok.value, msg_tok.length);
- (void) gss_release_buffer(&min_status, &msg_tok);
-
- if (send_tok.length != 0) {
- packet_put_char(1); /* true */
- packet_put_string((char *)send_tok.value, send_tok.length);
- (void) gss_release_buffer(&min_status, &send_tok);
- } else {
- packet_put_char(0); /* false */
- }
- packet_send();
- packet_write_wait();
-
- DH_free(dh);
-
- kex_derive_keys(kex, hash, shared_secret);
- BN_clear_free(shared_secret);
- kex_finish(kex);
-}
-
-static void
-kex_gss_send_error(Gssctxt *ctxt) {
- char *errstr;
- OM_uint32 maj, min;
-
- errstr = ssh_gssapi_last_error(ctxt, &maj, &min);
- if (errstr) {
- packet_start(SSH2_MSG_KEXGSS_ERROR);
- packet_put_int(maj);
- packet_put_int(min);
- packet_put_cstring(errstr);
- packet_put_cstring("");
- packet_send();
- packet_write_wait();
- /* XXX - We should probably log the error locally here */
- xfree(errstr);
- }
-}
-#endif /* GSSAPI */
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