1 /*
2  * Copyright (c) 2004, PADL Software Pty Ltd.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  *
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.
15  *
16  * 3. Neither the name of PADL Software 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.
19  *
20  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
21  * 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 PADL SOFTWARE 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
30  * SUCH DAMAGE.
31  */
32 
33 #include "mech_locl.h"
34 
35 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
36 gss_create_empty_buffer_set
37 	   (OM_uint32 * minor_status,
38 	    gss_buffer_set_t *buffer_set)
39 {
40     gss_buffer_set_t set;
41 
42     set = (gss_buffer_set_desc *) malloc(sizeof(*set));
43     if (set == GSS_C_NO_BUFFER_SET) {
44 	*minor_status = ENOMEM;
45 	return GSS_S_FAILURE;
46     }
47 
48     set->count = 0;
49     set->elements = NULL;
50 
51     *buffer_set = set;
52 
53     *minor_status = 0;
54     return GSS_S_COMPLETE;
55 }
56 
57 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
58 gss_add_buffer_set_member
59 	   (OM_uint32 * minor_status,
60 	    const gss_buffer_t member_buffer,
61 	    gss_buffer_set_t *buffer_set)
62 {
63     gss_buffer_set_t set;
64     gss_buffer_t p;
65     OM_uint32 ret;
66 
67     if (*buffer_set == GSS_C_NO_BUFFER_SET) {
68 	ret = gss_create_empty_buffer_set(minor_status,
69 					  buffer_set);
70 	if (ret) {
71 	    return ret;
72 	}
73     }
74 
75     set = *buffer_set;
76     set->elements = realloc(set->elements,
77 			    (set->count + 1) * sizeof(set->elements[0]));
78     if (set->elements == NULL) {
79 	*minor_status = ENOMEM;
80 	return GSS_S_FAILURE;
81     }
82 
83     p = &set->elements[set->count];
84 
85     p->value = malloc(member_buffer->length);
86     if (p->value == NULL) {
87 	*minor_status = ENOMEM;
88 	return GSS_S_FAILURE;
89     }
90     memcpy(p->value, member_buffer->value, member_buffer->length);
91     p->length = member_buffer->length;
92 
93     set->count++;
94 
95     *minor_status = 0;
96     return GSS_S_COMPLETE;
97 }
98 
99 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
100 gss_release_buffer_set(OM_uint32 * minor_status,
101 		       gss_buffer_set_t *buffer_set)
102 {
103     size_t i;
104     OM_uint32 minor;
105 
106     *minor_status = 0;
107 
108     if (*buffer_set == GSS_C_NO_BUFFER_SET)
109 	return GSS_S_COMPLETE;
110 
111     for (i = 0; i < (*buffer_set)->count; i++)
112 	gss_release_buffer(&minor, &((*buffer_set)->elements[i]));
113 
114     free((*buffer_set)->elements);
115 
116     (*buffer_set)->elements = NULL;
117     (*buffer_set)->count = 0;
118 
119     free(*buffer_set);
120     *buffer_set = GSS_C_NO_BUFFER_SET;
121 
122     return GSS_S_COMPLETE;
123 }
124 
125