summaryrefslogtreecommitdiff
path: root/source4/heimdal/lib/gssapi/krb5/encapsulate.c
blob: 58dcb5c9c4b241896b5ee8beff0a7349416a1d4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*
 * 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 "krb5/gsskrb5_locl.h"

RCSID("$Id: encapsulate.c 18459 2006-10-14 10:12:16Z lha $");

void
_gssapi_encap_length (size_t data_len,
		      size_t *len,
		      size_t *total_len,
		      const gss_OID mech)
{
    size_t len_len;

    *len = 1 + 1 + mech->length + data_len;

    len_len = der_length_len(*len);

    *total_len = 1 + len_len + *len;
}

void
_gsskrb5_encap_length (size_t data_len,
			  size_t *len,
			  size_t *total_len,
			  const gss_OID mech)
{
    _gssapi_encap_length(data_len + 2, len, total_len, mech);
}

void *
_gsskrb5_make_header (void *ptr,
			 size_t len,
			 const void *type,
			 const gss_OID mech)
{
    u_char *p = ptr;
    p = _gssapi_make_mech_header(p, len, mech);
    memcpy (p, type, 2);
    p += 2;
    return p;
}

void *
_gssapi_make_mech_header(void *ptr,
			 size_t len,
			 const gss_OID mech)
{
    u_char *p = ptr;
    int e;
    size_t len_len, foo;

    *p++ = 0x60;
    len_len = der_length_len(len);
    e = der_put_length (p + len_len - 1, len_len, len, &foo);
    if(e || foo != len_len)
	abort ();
    p += len_len;
    *p++ = 0x06;
    *p++ = mech->length;
    memcpy (p, mech->elements, mech->length);
    p += mech->length;
    return p;
}

/*
 * Give it a krb5_data and it will encapsulate with extra GSS-API wrappings.
 */

OM_uint32
_gssapi_encapsulate(
    OM_uint32 *minor_status,
    const krb5_data *in_data,
    gss_buffer_t output_token,
    const gss_OID mech
)
{
    size_t len, outer_len;
    void *p;

    _gssapi_encap_length (in_data->length, &len, &outer_len, mech);
    
    output_token->length = outer_len;
    output_token->value  = malloc (outer_len);
    if (output_token->value == NULL) {
	*minor_status = ENOMEM;
	return GSS_S_FAILURE;
    }	

    p = _gssapi_make_mech_header (output_token->value, len, mech);
    memcpy (p, in_data->data, in_data->length);
    return GSS_S_COMPLETE;
}

/*
 * Give it a krb5_data and it will encapsulate with extra GSS-API krb5
 * wrappings.
 */

OM_uint32
_gsskrb5_encapsulate(
			OM_uint32 *minor_status,    
			const krb5_data *in_data,
			gss_buffer_t output_token,
			const void *type,
			const gss_OID mech
)
{
    size_t len, outer_len;
    u_char *p;

    _gsskrb5_encap_length (in_data->length, &len, &outer_len, mech);
    
    output_token->length = outer_len;
    output_token->value  = malloc (outer_len);
    if (output_token->value == NULL) {
	*minor_status = ENOMEM;
	return GSS_S_FAILURE;
    }	

    p = _gsskrb5_make_header (output_token->value, len, type, mech);
    memcpy (p, in_data->data, in_data->length);
    return GSS_S_COMPLETE;
}