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
parse_krb5_name(OM_uint32 * minor_status,krb5_context context,const char * name,gss_name_t * output_name)37 parse_krb5_name (OM_uint32 *minor_status,
38 krb5_context context,
39 const char *name,
40 gss_name_t *output_name)
41 {
42 krb5_principal princ;
43 krb5_error_code kerr;
44
45 kerr = krb5_parse_name (context, name, &princ);
46
47 if (kerr == 0) {
48 *output_name = (gss_name_t)princ;
49 return GSS_S_COMPLETE;
50 }
51 *minor_status = kerr;
52
53 if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
54 return GSS_S_BAD_NAME;
55
56 return GSS_S_FAILURE;
57 }
58
59 static OM_uint32
import_krb5_name(OM_uint32 * minor_status,krb5_context context,const gss_buffer_t input_name_buffer,gss_name_t * output_name)60 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 OM_uint32 ret;
66 char *tmp;
67
68 tmp = malloc (input_name_buffer->length + 1);
69 if (tmp == NULL) {
70 *minor_status = ENOMEM;
71 return GSS_S_FAILURE;
72 }
73 memcpy (tmp,
74 input_name_buffer->value,
75 input_name_buffer->length);
76 tmp[input_name_buffer->length] = '\0';
77
78 ret = parse_krb5_name(minor_status, context, tmp, output_name);
79 free(tmp);
80
81 return ret;
82 }
83
84 OM_uint32
_gsskrb5_canon_name(OM_uint32 * minor_status,krb5_context context,int use_dns,krb5_const_principal sourcename,gss_name_t targetname,krb5_principal * out)85 _gsskrb5_canon_name(OM_uint32 *minor_status, krb5_context context,
86 int use_dns, krb5_const_principal sourcename, gss_name_t targetname,
87 krb5_principal *out)
88 {
89 krb5_principal p = (krb5_principal)targetname;
90 krb5_error_code ret;
91 char *hostname = NULL, *service;
92
93 *minor_status = 0;
94
95 /* If its not a hostname */
96 if (krb5_principal_get_type(context, p) != MAGIC_HOSTBASED_NAME_TYPE) {
97 ret = krb5_copy_principal(context, p, out);
98 } else if (!use_dns) {
99 ret = krb5_copy_principal(context, p, out);
100 if (ret)
101 goto out;
102 krb5_principal_set_type(context, *out, KRB5_NT_SRV_HST);
103 if (sourcename)
104 ret = krb5_principal_set_realm(context, *out, sourcename->realm);
105 } else {
106 if (p->name.name_string.len == 0)
107 return GSS_S_BAD_NAME;
108 else if (p->name.name_string.len > 1)
109 hostname = p->name.name_string.val[1];
110
111 service = p->name.name_string.val[0];
112
113 ret = krb5_sname_to_principal(context,
114 hostname,
115 service,
116 KRB5_NT_SRV_HST,
117 out);
118 }
119
120 out:
121 if (ret) {
122 *minor_status = ret;
123 return GSS_S_FAILURE;
124 }
125
126 return 0;
127 }
128
129
130 static OM_uint32
import_hostbased_name(OM_uint32 * minor_status,krb5_context context,const gss_buffer_t input_name_buffer,gss_name_t * output_name)131 import_hostbased_name (OM_uint32 *minor_status,
132 krb5_context context,
133 const gss_buffer_t input_name_buffer,
134 gss_name_t *output_name)
135 {
136 krb5_principal princ = NULL;
137 krb5_error_code kerr;
138 char *tmp, *p, *host = NULL;
139
140 tmp = malloc (input_name_buffer->length + 1);
141 if (tmp == NULL) {
142 *minor_status = ENOMEM;
143 return GSS_S_FAILURE;
144 }
145 memcpy (tmp,
146 input_name_buffer->value,
147 input_name_buffer->length);
148 tmp[input_name_buffer->length] = '\0';
149
150 p = strchr (tmp, '@');
151 if (p != NULL) {
152 *p = '\0';
153 host = p + 1;
154 }
155
156 kerr = krb5_make_principal(context, &princ, NULL, tmp, host, NULL);
157 free (tmp);
158 *minor_status = kerr;
159 if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
160 return GSS_S_BAD_NAME;
161 else if (kerr)
162 return GSS_S_FAILURE;
163
164 krb5_principal_set_type(context, princ, MAGIC_HOSTBASED_NAME_TYPE);
165 *output_name = (gss_name_t)princ;
166
167 return 0;
168 }
169
170 static OM_uint32
import_export_name(OM_uint32 * minor_status,krb5_context context,const gss_buffer_t input_name_buffer,gss_name_t * output_name)171 import_export_name (OM_uint32 *minor_status,
172 krb5_context context,
173 const gss_buffer_t input_name_buffer,
174 gss_name_t *output_name)
175 {
176 unsigned char *p;
177 uint32_t length;
178 OM_uint32 ret;
179 char *name;
180
181 if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length)
182 return GSS_S_BAD_NAME;
183
184 /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
185
186 p = input_name_buffer->value;
187
188 if (memcmp(&p[0], "\x04\x01\x00", 3) != 0 ||
189 p[3] != GSS_KRB5_MECHANISM->length + 2 ||
190 p[4] != 0x06 ||
191 p[5] != GSS_KRB5_MECHANISM->length ||
192 memcmp(&p[6], GSS_KRB5_MECHANISM->elements,
193 GSS_KRB5_MECHANISM->length) != 0)
194 return GSS_S_BAD_NAME;
195
196 p += 6 + GSS_KRB5_MECHANISM->length;
197
198 length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
199 p += 4;
200
201 if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length)
202 return GSS_S_BAD_NAME;
203
204 name = malloc(length + 1);
205 if (name == NULL) {
206 *minor_status = ENOMEM;
207 return GSS_S_FAILURE;
208 }
209 memcpy(name, p, length);
210 name[length] = '\0';
211
212 ret = parse_krb5_name(minor_status, context, name, output_name);
213 free(name);
214
215 return ret;
216 }
217
_gsskrb5_import_name(OM_uint32 * minor_status,const gss_buffer_t input_name_buffer,const gss_OID input_name_type,gss_name_t * output_name)218 OM_uint32 GSSAPI_CALLCONV _gsskrb5_import_name
219 (OM_uint32 * minor_status,
220 const gss_buffer_t input_name_buffer,
221 const gss_OID input_name_type,
222 gss_name_t * output_name
223 )
224 {
225 krb5_context context;
226
227 *minor_status = 0;
228 *output_name = GSS_C_NO_NAME;
229
230 GSSAPI_KRB5_INIT (&context);
231
232 if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE) ||
233 gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE_X))
234 return import_hostbased_name (minor_status,
235 context,
236 input_name_buffer,
237 output_name);
238 else if (input_name_type == GSS_C_NO_OID
239 || gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME)
240 || gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
241 /* default printable syntax */
242 return import_krb5_name (minor_status,
243 context,
244 input_name_buffer,
245 output_name);
246 else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME)) {
247 return import_export_name(minor_status,
248 context,
249 input_name_buffer,
250 output_name);
251 } else {
252 *minor_status = 0;
253 return GSS_S_BAD_NAMETYPE;
254 }
255 }
256