summaryrefslogtreecommitdiffstats
path: root/src/lib/krb5/krb/ser_addr.c
blob: 11b7f6abfca8b7a3770e56bf848339bb7f1b150a (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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
 * lib/krb5/krb/ser_addr.c
 *
 * Copyright 1995, 2008 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

/*
 * ser_addr.c - Serialize a krb5_address structure.
 */
#include "k5-int.h"
#include "int-proto.h"

/*
 * Routines to deal with externalizing the krb5_address:
 *	krb5_address_size();
 *	krb5_address_externalize();
 *	krb5_address_internalize();
 */
static krb5_error_code krb5_address_size
	(krb5_context, krb5_pointer, size_t *);
static krb5_error_code krb5_address_externalize
	(krb5_context, krb5_pointer, krb5_octet **, size_t *);
static krb5_error_code krb5_address_internalize
	(krb5_context,krb5_pointer *, krb5_octet **, size_t *);

/* Local data */
static const krb5_ser_entry krb5_address_ser_entry = {
    KV5M_ADDRESS,			/* Type			*/
    krb5_address_size,		/* Sizer routine	*/
    krb5_address_externalize,		/* Externalize routine	*/
    krb5_address_internalize		/* Internalize routine	*/
};

/*
 * krb5_address_size()	- Determine the size required to externalize
 *				  the krb5_address.
 */
static krb5_error_code
krb5_address_size(krb5_context kcontext, krb5_pointer arg, size_t *sizep)
{
    krb5_error_code	kret;
    krb5_address	*address;

    /*
     * krb5_address requires:
     *	krb5_int32		for KV5M_ADDRESS
     *	krb5_int32		for addrtype
     *	krb5_int32		for length
     *	address->length		for contents
     *	krb5_int32		for KV5M_ADDRESS
     */
    kret = EINVAL;
    if ((address = (krb5_address *) arg)) {
	*sizep += (sizeof(krb5_int32) +
		   sizeof(krb5_int32) +
		   sizeof(krb5_int32) +
		   sizeof(krb5_int32) +
		   (size_t) address->length);
	kret = 0;
    }
    return(kret);
}

/*
 * krb5_address_externalize()	- Externalize the krb5_address.
 */
static krb5_error_code
krb5_address_externalize(krb5_context kcontext, krb5_pointer arg, krb5_octet **buffer, size_t *lenremain)
{
    krb5_error_code	kret;
    krb5_address	*address;
    size_t		required;
    krb5_octet		*bp;
    size_t		remain;

    required = 0;
    bp = *buffer;
    remain = *lenremain;
    kret = EINVAL;
    if ((address = (krb5_address *) arg)) {
	kret = ENOMEM;
	if (!krb5_address_size(kcontext, arg, &required) &&
	    (required <= remain)) {
	    /* Our identifier */
	    (void) krb5_ser_pack_int32(KV5M_ADDRESS, &bp, &remain);
		
	    /* Our addrtype */
	    (void) krb5_ser_pack_int32((krb5_int32) address->addrtype,
				       &bp, &remain);

	    /* Our length */
	    (void) krb5_ser_pack_int32((krb5_int32) address->length,
				       &bp, &remain);

	    /* Our contents */
	    (void) krb5_ser_pack_bytes(address->contents,
				       (size_t) address->length,
				       &bp, &remain);

	    /* Finally, our trailer */
	    (void) krb5_ser_pack_int32(KV5M_ADDRESS, &bp, &remain);

	    kret = 0;
	    *buffer = bp;
	    *lenremain = remain;
	}
    }
    return(kret);
}

/*
 * krb5_address_internalize()	- Internalize the krb5_address.
 */
static krb5_error_code
krb5_address_internalize(krb5_context kcontext, krb5_pointer *argp, krb5_octet **buffer, size_t *lenremain)
{
    krb5_error_code	kret;
    krb5_address	*address;
    krb5_int32		ibuf;
    krb5_octet		*bp;
    size_t		remain;

    bp = *buffer;
    remain = *lenremain;
    kret = EINVAL;
    /* Read our magic number */
    if (krb5_ser_unpack_int32(&ibuf, &bp, &remain))
	ibuf = 0;
    if (ibuf == KV5M_ADDRESS) {
	kret = ENOMEM;

	/* Get a address */
	if ((remain >= (2*sizeof(krb5_int32))) &&
	    (address = (krb5_address *) calloc(1, sizeof(krb5_address)))) {

	    address->magic = KV5M_ADDRESS;

	    /* Get the addrtype */
	    (void) krb5_ser_unpack_int32(&ibuf, &bp, &remain);
	    address->addrtype = (krb5_addrtype) ibuf;

	    /* Get the length */
	    (void) krb5_ser_unpack_int32(&ibuf, &bp, &remain);
	    address->length = (int) ibuf;

	    /* Get the string */
	    if ((address->contents = (krb5_octet *) malloc((size_t) (ibuf))) &&
		!(kret = krb5_ser_unpack_bytes(address->contents,
					       (size_t) ibuf,
					       &bp, &remain))) {
		/* Get the trailer */
		if ((kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain)))
		    ibuf = 0;

		if (!kret && (ibuf == KV5M_ADDRESS)) {
		    address->magic = KV5M_ADDRESS;
		    *buffer = bp;
		    *lenremain = remain;
		    *argp = (krb5_pointer) address;
		}
		else
		    kret = EINVAL;
	    }
	    if (kret) {
		if (address->contents)
		    free(address->contents);
		free(address);
	    }
	}
    }
    return(kret);
}

/*
 * Register the address serializer.
 */
krb5_error_code
krb5_ser_address_init(krb5_context kcontext)
{
    return(krb5_register_serializer(kcontext, &krb5_address_ser_entry));
}