2 * Copyright (c) 2010, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of JANET(UK) nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * Copyright 1993 by OpenVision Technologies, Inc.
35 * Permission to use, copy, modify, distribute, and sell this software
36 * and its documentation for any purpose is hereby granted without fee,
37 * provided that the above copyright notice appears in all copies and
38 * that both that copyright notice and this permission notice appear in
39 * supporting documentation, and that the name of OpenVision not be used
40 * in advertising or publicity pertaining to distribution of the software
41 * without specific, written prior permission. OpenVision makes no
42 * representations about the suitability of this software for any
43 * purpose. It is provided "as is" without express or implied warranty.
45 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
46 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
47 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
48 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
49 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
50 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
51 * PERFORMANCE OF THIS SOFTWARE.
55 * Message protection services: checksum helpers.
58 #include "gssapiP_eap.h"
61 gssEapChecksum(krb5_context context,
64 #ifdef HAVE_HEIMDAL_VERSION
67 krb5_keyblock *crypto,
69 krb5_keyusage sign_usage,
70 gss_iov_buffer_desc *iov,
76 gss_iov_buffer_desc *header;
77 gss_iov_buffer_desc *trailer;
78 krb5_crypto_iov *kiov;
81 size_t k5_checksumlen;
82 #ifdef HAVE_HEIMDAL_VERSION
83 krb5_cksumtype cksumtype;
89 code = krbCryptoLength(context, crypto, KRB5_CRYPTO_TYPE_CHECKSUM, &k5_checksumlen);
93 header = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_HEADER);
94 assert(header != NULL);
96 trailer = gssEapLocateIov(iov, iov_count, GSS_IOV_BUFFER_TYPE_TRAILER);
97 assert(rrc != 0 || trailer != NULL);
99 if (trailer == NULL) {
100 if (rrc != k5_checksumlen)
101 return KRB5_BAD_MSIZE;
102 if (header->buffer.length != 16 + k5_checksumlen)
103 return KRB5_BAD_MSIZE;
104 } else if (trailer->buffer.length != k5_checksumlen)
105 return KRB5_BAD_MSIZE;
107 kiov_count = 2 + iov_count;
108 kiov = (krb5_crypto_iov *)GSSEAP_MALLOC(kiov_count * sizeof(krb5_crypto_iov));
112 /* Checksum over ( Data | Header ) */
115 for (j = 0; j < iov_count; j++) {
116 kiov[i].flags = gssEapMapCryptoFlag(iov[j].type);
117 kiov[i].data.length = iov[j].buffer.length;
118 kiov[i].data.data = (char *)iov[j].buffer.value;
123 kiov[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
124 kiov[i].data.length = 16;
125 kiov[i].data.data = (char *)header->buffer.value;
129 kiov[i].flags = KRB5_CRYPTO_TYPE_CHECKSUM;
130 if (trailer == NULL) {
131 kiov[i].data.length = header->buffer.length - 16;
132 kiov[i].data.data = (char *)header->buffer.value + 16;
134 kiov[i].data.length = trailer->buffer.length;
135 kiov[i].data.data = (char *)trailer->buffer.value;
139 #ifdef HAVE_HEIMDAL_VERSION
141 code = krb5_verify_checksum_iov(context, crypto, sign_usage,
142 kiov, kiov_count, &cksumtype);
143 *valid = (code == 0);
145 code = krb5_create_checksum_iov(context, crypto, sign_usage,
146 kiov, kiov_count, &cksumtype);
150 krb5_boolean kvalid = FALSE;
152 code = krb5_c_verify_checksum_iov(context, type, crypto,
153 sign_usage, kiov, kiov_count, &kvalid);
157 code = krb5_c_make_checksum_iov(context, type, crypto,
158 sign_usage, kiov, kiov_count);
160 #endif /* HAVE_HEIMDAL_VERSION */
168 gssEapSign(krb5_context context,
171 #ifdef HAVE_HEIMDAL_VERSION
174 krb5_keyblock *crypto,
176 krb5_keyusage sign_usage,
177 gss_iov_buffer_desc *iov,
180 return gssEapChecksum(context, type, rrc, crypto,
181 sign_usage, iov, iov_count, 0, NULL);
185 gssEapVerify(krb5_context context,
188 #ifdef HAVE_HEIMDAL_VERSION
191 krb5_keyblock *crypto,
193 krb5_keyusage sign_usage,
194 gss_iov_buffer_desc *iov,
198 return gssEapChecksum(context, type, rrc, crypto,
199 sign_usage, iov, iov_count, 1, valid);
204 gssEapEncodeGssChannelBindings(OM_uint32 *minor,
205 gss_channel_bindings_t chanBindings,
206 gss_buffer_t encodedBindings)
208 OM_uint32 major, tmpMinor;
212 if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS) {
214 length += chanBindings->initiator_address.length;
215 length += chanBindings->acceptor_address.length;
216 length += chanBindings->application_data.length;
218 encodedBindings->value = GSSEAP_MALLOC(length);
219 if (encodedBindings->value == NULL) {
221 return GSS_S_FAILURE;
224 encodedBindings->length = length;
225 p = (unsigned char *)encodedBindings->value;
227 store_uint32_be(chanBindings->initiator_addrtype, p);
228 store_buffer(&chanBindings->initiator_address, p + 4, 0);
229 p += 4 + chanBindings->initiator_address.length;
231 store_uint32_be(chanBindings->acceptor_addrtype, p);
232 store_buffer(&chanBindings->acceptor_address, p + 4, 0);
233 p += 4 + chanBindings->acceptor_address.length;
235 store_buffer(&chanBindings->application_data, p, 1);
236 p += chanBindings->application_data.length;
238 encodedBindings->length = 0;
239 encodedBindings->value = NULL;
243 return GSS_S_COMPLETE;