1 /*
2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* #pragma ident "@(#)g_canon_name.c 1.15 04/02/23 SMI" */
7
8 /*
9 * routine gss_canonicalize_name
10 *
11 * This routine is used to produce a mechanism specific
12 * representation of name that has been previously
13 * imported with gss_import_name. The routine uses the mechanism
14 * specific implementation of gss_import_name to implement this
15 * function.
16 *
17 * We allow a NULL output_name, in which case we modify the
18 * input_name to include the mechanism specific name.
19 */
20
21 #include <mglueP.h>
22 #ifdef HAVE_STDLIB_H
23 #include <stdlib.h>
24 #endif
25 #include <string.h>
26 #include <errno.h>
27
28 static OM_uint32
val_canon_name_args(OM_uint32 * minor_status,const gss_name_t input_name,const gss_OID mech_type,gss_name_t * output_name)29 val_canon_name_args(
30 OM_uint32 *minor_status,
31 const gss_name_t input_name,
32 const gss_OID mech_type,
33 gss_name_t *output_name)
34 {
35
36 /* Initialize outputs. */
37
38 if (minor_status != NULL)
39 *minor_status = 0;
40
41 if (output_name != NULL)
42 *output_name = GSS_C_NO_NAME;
43
44 /* Validate arguments. */
45
46 if (minor_status == NULL)
47 return (GSS_S_CALL_INACCESSIBLE_WRITE);
48
49 if (input_name == GSS_C_NO_NAME || mech_type == GSS_C_NULL_OID)
50 return (GSS_S_CALL_INACCESSIBLE_READ);
51
52 return (GSS_S_COMPLETE);
53 }
54
55
56 OM_uint32 KRB5_CALLCONV
gss_canonicalize_name(OM_uint32 * minor_status,const gss_name_t input_name,const gss_OID mech_type,gss_name_t * output_name)57 gss_canonicalize_name(OM_uint32 *minor_status, const gss_name_t input_name,
58 const gss_OID mech_type, gss_name_t *output_name)
59 {
60 gss_union_name_t in_union, out_union = NULL, dest_union = NULL;
61 OM_uint32 major_status = GSS_S_FAILURE, tmpmin;
62 gss_OID selected_mech;
63
64 major_status = val_canon_name_args(minor_status,
65 input_name,
66 mech_type,
67 output_name);
68 if (major_status != GSS_S_COMPLETE)
69 return (major_status);
70
71 major_status = gssint_select_mech_type(minor_status, mech_type,
72 &selected_mech);
73 if (major_status != GSS_S_COMPLETE)
74 return (major_status);
75
76 /* Initial value needed below. */
77 major_status = GSS_S_FAILURE;
78
79 in_union = (gss_union_name_t)input_name;
80 /*
81 * If the caller wants to reuse the name, and the name has already
82 * been converted, then there is nothing for us to do.
83 */
84 if (!output_name && in_union->mech_type &&
85 g_OID_equal(in_union->mech_type, selected_mech))
86 return (GSS_S_COMPLETE);
87
88 /* ok, then we need to do something - start by creating data struct */
89 if (output_name) {
90 out_union =
91 (gss_union_name_t)malloc(sizeof (gss_union_name_desc));
92 if (!out_union)
93 goto allocation_failure;
94
95 out_union->mech_type = 0;
96 out_union->mech_name = 0;
97 out_union->name_type = 0;
98 out_union->external_name = 0;
99 out_union->loopback = out_union;
100
101 /* Allocate the buffer for the user specified representation */
102 if (gssint_create_copy_buffer(in_union->external_name,
103 &out_union->external_name, 1))
104 goto allocation_failure;
105
106 if (in_union->name_type != GSS_C_NULL_OID) {
107 major_status = generic_gss_copy_oid(minor_status,
108 in_union->name_type,
109 &out_union->name_type);
110 if (major_status) {
111 map_errcode(minor_status);
112 goto allocation_failure;
113 }
114 }
115
116 }
117
118 /*
119 * might need to delete any old mechanism names if we are
120 * reusing the buffer.
121 */
122 if (!output_name) {
123 if (in_union->mech_type) {
124 (void) gssint_release_internal_name(minor_status,
125 in_union->mech_type,
126 &in_union->mech_name);
127 (void) gss_release_oid(minor_status,
128 &in_union->mech_type);
129 in_union->mech_type = 0;
130 }
131 dest_union = in_union;
132 } else
133 dest_union = out_union;
134
135 /* now let's create the new mech name */
136 if ((major_status = generic_gss_copy_oid(minor_status, selected_mech,
137 &dest_union->mech_type))) {
138 map_errcode(minor_status);
139 goto allocation_failure;
140 }
141
142 if ((major_status =
143 gssint_import_internal_name(minor_status, selected_mech,
144 in_union,
145 &dest_union->mech_name)))
146 goto allocation_failure;
147
148 if (output_name)
149 *output_name = (gss_name_t)dest_union;
150
151 return (GSS_S_COMPLETE);
152
153 allocation_failure:
154 if (out_union) {
155 /* Release the partly constructed out_union. */
156 gss_name_t name = (gss_name_t)out_union;
157 (void) gss_release_name(&tmpmin, &name);
158 } else if (!output_name) {
159 /* Release only the mech name fields in in_union. */
160 if (in_union->mech_name) {
161 (void) gssint_release_internal_name(&tmpmin,
162 dest_union->mech_type,
163 &dest_union->mech_name);
164 }
165 if (in_union->mech_type)
166 (void) gss_release_oid(&tmpmin, &dest_union->mech_type);
167 }
168
169 return (major_status);
170 } /********** gss_canonicalize_name ********/
171