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authorHeimdal Import User <samba-bugs@samba.org>2005-07-11 01:16:55 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:19:33 -0500
commit954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9 (patch)
treefc11a048c8a582e2ca66415ff04dacf74f9abf22 /source4/heimdal/lib/gssapi/8003.c
parent7ead5ab06cea9f33e954a4579163262f97ea06ff (diff)
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r8302: import mini HEIMDAL into the tree
(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)
Diffstat (limited to 'source4/heimdal/lib/gssapi/8003.c')
-rw-r--r--source4/heimdal/lib/gssapi/8003.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/source4/heimdal/lib/gssapi/8003.c b/source4/heimdal/lib/gssapi/8003.c
new file mode 100644
index 0000000000..b60d2608e2
--- /dev/null
+++ b/source4/heimdal/lib/gssapi/8003.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ */
+
+#include "gssapi_locl.h"
+
+RCSID("$Id: 8003.c,v 1.17 2005/04/01 08:55:36 lha Exp $");
+
+krb5_error_code
+gssapi_encode_om_uint32(OM_uint32 n, u_char *p)
+{
+ p[0] = (n >> 0) & 0xFF;
+ p[1] = (n >> 8) & 0xFF;
+ p[2] = (n >> 16) & 0xFF;
+ p[3] = (n >> 24) & 0xFF;
+ return 0;
+}
+
+krb5_error_code
+gssapi_encode_be_om_uint32(OM_uint32 n, u_char *p)
+{
+ p[0] = (n >> 24) & 0xFF;
+ p[1] = (n >> 16) & 0xFF;
+ p[2] = (n >> 8) & 0xFF;
+ p[3] = (n >> 0) & 0xFF;
+ return 0;
+}
+
+krb5_error_code
+gssapi_decode_om_uint32(u_char *p, OM_uint32 *n)
+{
+ *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
+ return 0;
+}
+
+krb5_error_code
+gssapi_decode_be_om_uint32(u_char *p, OM_uint32 *n)
+{
+ *n = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
+ return 0;
+}
+
+static krb5_error_code
+hash_input_chan_bindings (const gss_channel_bindings_t b,
+ u_char *p)
+{
+ u_char num[4];
+ MD5_CTX md5;
+
+ MD5_Init(&md5);
+ gssapi_encode_om_uint32 (b->initiator_addrtype, num);
+ MD5_Update (&md5, num, sizeof(num));
+ gssapi_encode_om_uint32 (b->initiator_address.length, num);
+ MD5_Update (&md5, num, sizeof(num));
+ if (b->initiator_address.length)
+ MD5_Update (&md5,
+ b->initiator_address.value,
+ b->initiator_address.length);
+ gssapi_encode_om_uint32 (b->acceptor_addrtype, num);
+ MD5_Update (&md5, num, sizeof(num));
+ gssapi_encode_om_uint32 (b->acceptor_address.length, num);
+ MD5_Update (&md5, num, sizeof(num));
+ if (b->acceptor_address.length)
+ MD5_Update (&md5,
+ b->acceptor_address.value,
+ b->acceptor_address.length);
+ gssapi_encode_om_uint32 (b->application_data.length, num);
+ MD5_Update (&md5, num, sizeof(num));
+ if (b->application_data.length)
+ MD5_Update (&md5,
+ b->application_data.value,
+ b->application_data.length);
+ MD5_Final (p, &md5);
+ return 0;
+}
+
+/*
+ * create a checksum over the chanel bindings in
+ * `input_chan_bindings', `flags' and `fwd_data' and return it in
+ * `result'
+ */
+
+OM_uint32
+gssapi_krb5_create_8003_checksum (
+ OM_uint32 *minor_status,
+ const gss_channel_bindings_t input_chan_bindings,
+ OM_uint32 flags,
+ const krb5_data *fwd_data,
+ Checksum *result)
+{
+ u_char *p;
+
+ /*
+ * see rfc1964 (section 1.1.1 (Initial Token), and the checksum value
+ * field's format) */
+ result->cksumtype = CKSUMTYPE_GSSAPI;
+ if (fwd_data->length > 0 && (flags & GSS_C_DELEG_FLAG))
+ result->checksum.length = 24 + 4 + fwd_data->length;
+ else
+ result->checksum.length = 24;
+ result->checksum.data = malloc (result->checksum.length);
+ if (result->checksum.data == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = result->checksum.data;
+ gssapi_encode_om_uint32 (16, p);
+ p += 4;
+ if (input_chan_bindings == GSS_C_NO_CHANNEL_BINDINGS) {
+ memset (p, 0, 16);
+ } else {
+ hash_input_chan_bindings (input_chan_bindings, p);
+ }
+ p += 16;
+ gssapi_encode_om_uint32 (flags, p);
+ p += 4;
+
+ if (fwd_data->length > 0 && (flags & GSS_C_DELEG_FLAG)) {
+
+ *p++ = (1 >> 0) & 0xFF; /* DlgOpt */ /* == 1 */
+ *p++ = (1 >> 8) & 0xFF; /* DlgOpt */ /* == 0 */
+ *p++ = (fwd_data->length >> 0) & 0xFF; /* Dlgth */
+ *p++ = (fwd_data->length >> 8) & 0xFF; /* Dlgth */
+ memcpy(p, (unsigned char *) fwd_data->data, fwd_data->length);
+
+ p += fwd_data->length;
+ }
+
+ return GSS_S_COMPLETE;
+}
+
+/*
+ * verify the checksum in `cksum' over `input_chan_bindings'
+ * returning `flags' and `fwd_data'
+ */
+
+OM_uint32
+gssapi_krb5_verify_8003_checksum(
+ OM_uint32 *minor_status,
+ const gss_channel_bindings_t input_chan_bindings,
+ const Checksum *cksum,
+ OM_uint32 *flags,
+ krb5_data *fwd_data)
+{
+ unsigned char hash[16];
+ unsigned char *p;
+ OM_uint32 length;
+ int DlgOpt;
+ static unsigned char zeros[16];
+
+ if (cksum == NULL) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+
+ /* XXX should handle checksums > 24 bytes */
+ if(cksum->cksumtype != CKSUMTYPE_GSSAPI || cksum->checksum.length < 24) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+
+ p = cksum->checksum.data;
+ gssapi_decode_om_uint32(p, &length);
+ if(length != sizeof(hash)) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+
+ p += 4;
+
+ if (input_chan_bindings != GSS_C_NO_CHANNEL_BINDINGS
+ && memcmp(p, zeros, sizeof(zeros)) != 0) {
+ if(hash_input_chan_bindings(input_chan_bindings, hash) != 0) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+ if(memcmp(hash, p, sizeof(hash)) != 0) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+ }
+
+ p += sizeof(hash);
+
+ gssapi_decode_om_uint32(p, flags);
+ p += 4;
+
+ if (cksum->checksum.length > 24 && (*flags & GSS_C_DELEG_FLAG)) {
+ if(cksum->checksum.length < 28) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+
+ DlgOpt = (p[0] << 0) | (p[1] << 8);
+ p += 2;
+ if (DlgOpt != 1) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+
+ fwd_data->length = (p[0] << 0) | (p[1] << 8);
+ p += 2;
+ if(cksum->checksum.length < 28 + fwd_data->length) {
+ *minor_status = 0;
+ return GSS_S_BAD_BINDINGS;
+ }
+ fwd_data->data = malloc(fwd_data->length);
+ if (fwd_data->data == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+ memcpy(fwd_data->data, p, fwd_data->length);
+ }
+
+ return GSS_S_COMPLETE;
+}