2 * Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "gssapi_locl.h"
38 static krb5_error_code
39 encode_om_uint32(OM_uint32 n
, u_char
*p
)
41 p
[0] = (n
>> 0) & 0xFF;
42 p
[1] = (n
>> 8) & 0xFF;
43 p
[2] = (n
>> 16) & 0xFF;
44 p
[3] = (n
>> 24) & 0xFF;
48 static krb5_error_code
49 decode_om_uint32(u_char
*p
, OM_uint32
*n
)
51 *n
= (p
[0] << 0) | (p
[1] << 8) | (p
[2] << 16) | (p
[3] << 24);
55 static krb5_error_code
56 hash_input_chan_bindings (const gss_channel_bindings_t b
,
63 encode_om_uint32 (b
->initiator_addrtype
, num
);
64 md5_update (&md5
, num
, sizeof(num
));
65 encode_om_uint32 (b
->initiator_address
.length
, num
);
66 md5_update (&md5
, num
, sizeof(num
));
67 if (b
->initiator_address
.length
)
69 b
->initiator_address
.value
,
70 b
->initiator_address
.length
);
71 encode_om_uint32 (b
->acceptor_addrtype
, num
);
72 md5_update (&md5
, num
, sizeof(num
));
73 encode_om_uint32 (b
->acceptor_address
.length
, num
);
74 md5_update (&md5
, num
, sizeof(num
));
75 if (b
->acceptor_address
.length
)
77 b
->acceptor_address
.value
,
78 b
->acceptor_address
.length
);
79 encode_om_uint32 (b
->application_data
.length
, num
);
80 md5_update (&md5
, num
, sizeof(num
));
81 if (b
->application_data
.length
)
83 b
->application_data
.value
,
84 b
->application_data
.length
);
90 gssapi_krb5_create_8003_checksum (
91 const gss_channel_bindings_t input_chan_bindings
,
97 result
->cksumtype
= 0x8003;
98 result
->checksum
.length
= 24;
99 result
->checksum
.data
= malloc (result
->checksum
.length
);
100 if (result
->checksum
.data
== NULL
)
103 p
= result
->checksum
.data
;
104 encode_om_uint32 (16, p
);
106 if (input_chan_bindings
== GSS_C_NO_CHANNEL_BINDINGS
) {
109 hash_input_chan_bindings (input_chan_bindings
, p
);
112 encode_om_uint32 (flags
, p
);
114 if (p
- (u_char
*)result
->checksum
.data
!= result
->checksum
.length
)
120 gssapi_krb5_verify_8003_checksum(
121 const gss_channel_bindings_t input_chan_bindings
,
125 unsigned char hash
[16];
129 /* XXX should handle checksums > 24 bytes */
130 if(cksum
->cksumtype
!= 0x8003 || cksum
->checksum
.length
!= 24)
131 return GSS_S_BAD_BINDINGS
;
133 p
= cksum
->checksum
.data
;
134 decode_om_uint32(p
, &length
);
135 if(length
!= sizeof(hash
))
136 return GSS_S_FAILURE
;
140 if (input_chan_bindings
!= GSS_C_NO_CHANNEL_BINDINGS
) {
141 if(hash_input_chan_bindings(input_chan_bindings
, hash
) != 0)
142 return GSS_S_FAILURE
;
143 if(memcmp(hash
, p
, sizeof(hash
)) != 0)
144 return GSS_S_FAILURE
;
149 decode_om_uint32(p
, flags
);