Line data Source code
1 : /*
2 : * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
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.
16 : *
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.
20 : *
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)
28 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 : * SUCH DAMAGE.
32 : */
33 :
34 : #include "gsskrb5_locl.h"
35 :
36 : static OM_uint32
37 24237 : parse_krb5_name (OM_uint32 *minor_status,
38 : krb5_context context,
39 : const char *name,
40 : gss_name_t *output_name)
41 : {
42 1035 : krb5_principal princ;
43 1035 : krb5_error_code kerr;
44 :
45 25272 : kerr = krb5_parse_name (context, name, &princ);
46 :
47 24237 : if (kerr == 0) {
48 24237 : *output_name = (gss_name_t)princ;
49 24237 : return GSS_S_COMPLETE;
50 : }
51 0 : *minor_status = kerr;
52 :
53 0 : if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
54 0 : return GSS_S_BAD_NAME;
55 :
56 0 : return GSS_S_FAILURE;
57 : }
58 :
59 : static OM_uint32
60 24237 : import_krb5_name (OM_uint32 *minor_status,
61 : krb5_context context,
62 : const gss_buffer_t input_name_buffer,
63 : gss_name_t *output_name)
64 : {
65 1035 : OM_uint32 ret;
66 1035 : char *tmp;
67 :
68 24237 : tmp = malloc (input_name_buffer->length + 1);
69 24237 : if (tmp == NULL) {
70 0 : *minor_status = ENOMEM;
71 0 : return GSS_S_FAILURE;
72 : }
73 24237 : memcpy (tmp,
74 24237 : input_name_buffer->value,
75 : input_name_buffer->length);
76 24237 : tmp[input_name_buffer->length] = '\0';
77 :
78 24237 : ret = parse_krb5_name(minor_status, context, tmp, output_name);
79 24237 : free(tmp);
80 :
81 24237 : return ret;
82 : }
83 :
84 : OM_uint32
85 24237 : _gsskrb5_canon_name(OM_uint32 *minor_status, krb5_context context,
86 : gss_const_name_t targetname, krb5_principal *out)
87 : {
88 24237 : krb5_const_principal p = (krb5_const_principal)targetname;
89 1035 : krb5_error_code ret;
90 24237 : char *hostname = NULL, *service;
91 1035 : int type;
92 1035 : const char *comp;
93 :
94 24237 : *minor_status = 0;
95 :
96 : /* If its not a hostname */
97 24237 : type = krb5_principal_get_type(context, p);
98 24237 : comp = krb5_principal_get_comp_string(context, p, 0);
99 24237 : if (type == KRB5_NT_SRV_HST || type == KRB5_NT_SRV_HST_NEEDS_CANON ||
100 1007 : (type == KRB5_NT_UNKNOWN && comp != NULL && strcmp(comp, "host") == 0)) {
101 1748 : if (p->name.name_string.len == 0)
102 0 : return GSS_S_BAD_NAME;
103 1748 : else if (p->name.name_string.len > 1)
104 1748 : hostname = p->name.name_string.val[1];
105 :
106 1748 : service = p->name.name_string.val[0];
107 :
108 1748 : ret = krb5_sname_to_principal(context,
109 : hostname,
110 : service,
111 : KRB5_NT_SRV_HST,
112 : out);
113 1748 : if (ret == 0) {
114 1748 : const char *in_realm = krb5_principal_get_realm(context,
115 : p);
116 1748 : const char *out_realm = krb5_principal_get_realm(context,
117 : *out);
118 :
119 : /*
120 : * Avoid loss of information, check for the "referral
121 : * realm" and set back what was specified.
122 : */
123 1748 : if (out_realm != NULL && out_realm[0] == '\0') {
124 1748 : ret = krb5_principal_set_realm(context, *out, in_realm);
125 : }
126 : }
127 : } else {
128 22489 : ret = krb5_copy_principal(context, p, out);
129 : }
130 :
131 24237 : if (ret) {
132 0 : *minor_status = ret;
133 0 : return GSS_S_FAILURE;
134 : }
135 :
136 23202 : return 0;
137 : }
138 :
139 :
140 : static OM_uint32
141 0 : import_hostbased_name(OM_uint32 *minor_status,
142 : krb5_context context,
143 : const gss_buffer_t input_name_buffer,
144 : gss_name_t *output_name)
145 : {
146 0 : krb5_principal princ = NULL;
147 0 : krb5_error_code kerr;
148 0 : char *tmp, *p, *host = NULL;
149 :
150 0 : tmp = malloc (input_name_buffer->length + 1);
151 0 : if (tmp == NULL) {
152 0 : *minor_status = ENOMEM;
153 0 : return GSS_S_FAILURE;
154 : }
155 0 : memcpy (tmp,
156 0 : input_name_buffer->value,
157 : input_name_buffer->length);
158 0 : tmp[input_name_buffer->length] = '\0';
159 :
160 0 : p = strchr (tmp, '@');
161 0 : if (p != NULL) {
162 0 : *p = '\0';
163 0 : host = p + 1;
164 : }
165 :
166 0 : kerr = krb5_make_principal(context, &princ, "", tmp, host, NULL);
167 0 : free (tmp);
168 0 : *minor_status = kerr;
169 0 : if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
170 0 : return GSS_S_BAD_NAME;
171 0 : else if (kerr)
172 0 : return GSS_S_FAILURE;
173 :
174 0 : krb5_principal_set_type(context, princ, KRB5_NT_SRV_HST);
175 0 : *output_name = (gss_name_t)princ;
176 :
177 0 : return 0;
178 : }
179 :
180 : static OM_uint32
181 0 : import_export_name (OM_uint32 *minor_status,
182 : krb5_context context,
183 : const gss_buffer_t input_name_buffer,
184 : gss_name_t *output_name)
185 : {
186 0 : CompositePrincipal *composite;
187 0 : unsigned char *p;
188 0 : uint32_t length;
189 0 : size_t sz;
190 0 : OM_uint32 ret;
191 0 : int is_composite;
192 0 : char *name;
193 :
194 0 : if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length)
195 0 : return GSS_S_BAD_NAME;
196 :
197 : /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
198 :
199 0 : p = input_name_buffer->value;
200 :
201 0 : if (p[0] != 0x04 ||
202 0 : (p[1] != 0x01 && p[1] != 0x02) ||
203 0 : p[2] != 0x00 ||
204 0 : p[3] != GSS_KRB5_MECHANISM->length + 2 ||
205 0 : p[4] != 0x06 ||
206 0 : p[5] != GSS_KRB5_MECHANISM->length ||
207 0 : memcmp(&p[6], GSS_KRB5_MECHANISM->elements,
208 0 : GSS_KRB5_MECHANISM->length) != 0)
209 0 : return GSS_S_BAD_NAME;
210 :
211 0 : is_composite = p[1] == 0x02;
212 :
213 0 : p += 6 + GSS_KRB5_MECHANISM->length;
214 :
215 0 : length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
216 0 : p += 4;
217 :
218 0 : if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length)
219 0 : return GSS_S_BAD_NAME;
220 :
221 0 : if (is_composite) {
222 0 : if ((composite = calloc(1, sizeof(*composite))) == NULL) {
223 0 : *minor_status = ENOMEM;
224 0 : return GSS_S_FAILURE;
225 : }
226 :
227 0 : ret = decode_CompositePrincipal(p, length, composite, &sz);
228 0 : if (ret) {
229 0 : *minor_status = ret;
230 0 : return GSS_S_FAILURE;
231 : }
232 0 : if (sz != length) {
233 0 : free_CompositePrincipal(composite);
234 0 : free(composite);
235 0 : *minor_status = EINVAL;
236 0 : return GSS_S_FAILURE;
237 : }
238 :
239 0 : *output_name = (void *)composite;
240 0 : return GSS_S_COMPLETE;
241 : }
242 :
243 0 : name = malloc(length + 1);
244 0 : if (name == NULL) {
245 0 : *minor_status = ENOMEM;
246 0 : return GSS_S_FAILURE;
247 : }
248 0 : memcpy(name, p, length);
249 0 : name[length] = '\0';
250 :
251 0 : ret = parse_krb5_name(minor_status, context, name, output_name);
252 0 : free(name);
253 0 : return ret;
254 : }
255 :
256 24237 : OM_uint32 GSSAPI_CALLCONV _gsskrb5_import_name
257 : (OM_uint32 * minor_status,
258 : const gss_buffer_t input_name_buffer,
259 : const gss_OID input_name_type,
260 : gss_name_t * output_name
261 : )
262 : {
263 1035 : krb5_context context;
264 :
265 24237 : *minor_status = 0;
266 24237 : *output_name = GSS_C_NO_NAME;
267 :
268 24237 : GSSAPI_KRB5_INIT (&context);
269 :
270 48474 : if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE) ||
271 24237 : gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE_X))
272 0 : return import_hostbased_name (minor_status,
273 : context,
274 : input_name_buffer,
275 : output_name);
276 24237 : else if (input_name_type == GSS_C_NO_OID
277 24116 : || gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME)
278 21 : || gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
279 : /* default printable syntax */
280 24237 : return import_krb5_name (minor_status,
281 : context,
282 : input_name_buffer,
283 : output_name);
284 0 : else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME) ||
285 0 : gss_oid_equal(input_name_type, GSS_C_NT_COMPOSITE_EXPORT)) {
286 0 : return import_export_name(minor_status,
287 : context,
288 : input_name_buffer,
289 : output_name);
290 : } else {
291 0 : *minor_status = 0;
292 0 : return GSS_S_BAD_NAMETYPE;
293 : }
294 : }
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