1 /*
2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6
7 /*
8 * Copyright2001 by the Massachusetts Institute of Technology.
9 * Copyright 1993 by OpenVision Technologies, Inc.
10 *
11 * Permission to use, copy, modify, distribute, and sell this software
12 * and its documentation for any purpose is hereby granted without fee,
13 * provided that the above copyright notice appears in all copies and
14 * that both that copyright notice and this permission notice appear in
15 * supporting documentation, and that the name of OpenVision not be used
16 * in advertising or publicity pertaining to distribution of the software
17 * without specific, written prior permission. OpenVision makes no
18 * representations about the suitability of this software for any
19 * purpose. It is provided "as is" without express or implied warranty.
20 *
21 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
22 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
23 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
24 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
25 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
26 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
27 * PERFORMANCE OF THIS SOFTWARE.
28 */
29
30 /*
31 * Copyright (C) 1998 by the FundsXpress, INC.
32 *
33 * All rights reserved.
34 *
35 * Export of this software from the United States of America may require
36 * a specific license from the United States Government. It is the
37 * responsibility of any person or organization contemplating export to
38 * obtain such a license before exporting.
39 *
40 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
41 * distribute this software and its documentation for any purpose and
42 * without fee is hereby granted, provided that the above copyright
43 * notice appear in all copies and that both that copyright notice and
44 * this permission notice appear in supporting documentation, and that
45 * the name of FundsXpress. not be used in advertising or publicity pertaining
46 * to distribution of the software without specific, written prior
47 * permission. FundsXpress makes no representations about the suitability of
48 * this software for any purpose. It is provided "as is" without express
49 * or implied warranty.
50 *
51 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
53 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
54 */
55
56 /* Solaris Kerberos: order is important here. include gssapiP_krb5.h
57 * before all others, otherwise we get a LINT error from MALLOC macro
58 * being redefined in mechglueP.h */
59 #include <gssapiP_krb5.h>
60 #include <k5-int.h>
61
62 /* Solaris Kerberos defines memory management macros in <krb5.h> */
63 /* #include <memory.h> */
64
65 /*
66 * $Id: util_crypt.c,v 1.11.6.3 2000/06/03 06:09:45 tlyu Exp $
67 */
68
69 int
kg_confounder_size(context,key)70 kg_confounder_size(context, key)
71 krb5_context context;
72 krb5_keyblock *key;
73 {
74 krb5_error_code code;
75 size_t blocksize;
76 /* We special case rc4*/
77 if (key->enctype == ENCTYPE_ARCFOUR_HMAC)
78 return 8;
79 code = krb5_c_block_size(context, key->enctype, &blocksize);
80 if (code)
81 return(-1); /* XXX */
82
83 return(blocksize);
84 }
85
86 krb5_error_code
kg_make_confounder(context,key,buf)87 kg_make_confounder(context, key, buf)
88 krb5_context context;
89 krb5_keyblock *key;
90 unsigned char *buf;
91 {
92 krb5_error_code code;
93 size_t blocksize;
94 krb5_data lrandom;
95
96 code = krb5_c_block_size(context, key->enctype, &blocksize);
97 if (code)
98 return(code);
99
100 lrandom.length = blocksize;
101 lrandom.data = (char *) buf;
102
103 return(krb5_c_random_make_octets(context, &lrandom));
104 }
105
106 int
kg_encrypt_size(context,key,n)107 kg_encrypt_size(context, key, n)
108 krb5_context context;
109 krb5_keyblock *key;
110 int n;
111 {
112 size_t enclen;
113
114 if (krb5_c_encrypt_length(context, key->enctype, n, &enclen) != 0)
115 return(-1); /* XXX */
116
117 return(enclen);
118 }
119
120 krb5_error_code
kg_encrypt(context,key,usage,iv,in,out,length)121 kg_encrypt(context, key, usage, iv, in, out, length)
122 krb5_context context;
123 krb5_keyblock *key;
124 int usage;
125 krb5_pointer iv;
126 krb5_const_pointer in;
127 krb5_pointer out;
128 unsigned int length;
129 {
130 krb5_error_code code;
131 size_t blocksize;
132 krb5_data ivd, *pivd, inputd;
133 krb5_enc_data outputd;
134
135 KRB5_LOG0(KRB5_INFO, "kg_encrypt() start.");
136
137 if (iv) {
138 code = krb5_c_block_size(context, key->enctype, &blocksize);
139 if (code)
140 return(code);
141
142 ivd.length = blocksize;
143 ivd.data = MALLOC(ivd.length);
144 if (ivd.data == NULL)
145 return ENOMEM;
146 (void) memcpy(ivd.data, iv, ivd.length);
147 pivd = &ivd;
148 } else {
149 pivd = NULL;
150 }
151
152 inputd.length = length;
153 inputd.data = (char *)in; /* Solaris Kerberos */
154
155 outputd.ciphertext.length = length;
156 outputd.ciphertext.data = out;
157
158 code = krb5_c_encrypt(context, key, usage, pivd, &inputd, &outputd);
159 if (pivd != NULL)
160 krb5_free_data_contents(context, pivd);
161
162 KRB5_LOG(KRB5_INFO, "kg_encrypt() end. code = %d", code);
163 return code;
164 }
165
166 /* length is the length of the cleartext. */
167
168 krb5_error_code
kg_decrypt(context,key,usage,iv,in,out,length)169 kg_decrypt(context, key, usage, iv, in, out, length)
170 krb5_context context;
171 krb5_keyblock *key;
172 int usage;
173 krb5_pointer iv;
174 krb5_const_pointer in;
175 krb5_pointer out;
176 unsigned int length;
177 {
178 krb5_error_code code;
179 size_t blocksize;
180 krb5_data ivd, *pivd, outputd;
181 krb5_enc_data inputd;
182 KRB5_LOG0(KRB5_INFO, "kg_decrypt() start.");
183
184 if (iv) {
185 code = krb5_c_block_size(context, key->enctype, &blocksize);
186 if (code)
187 return(code);
188
189 ivd.length = blocksize;
190 ivd.data = MALLOC(ivd.length);
191 if (ivd.data == NULL)
192 return ENOMEM;
193 (void) memcpy(ivd.data, iv, ivd.length);
194 pivd = &ivd;
195 } else {
196 pivd = NULL;
197 }
198
199 inputd.enctype = ENCTYPE_UNKNOWN;
200 inputd.ciphertext.length = length;
201 inputd.ciphertext.data = (char *)in; /* Solaris Kerberos */
202
203 outputd.length = length;
204 outputd.data = out;
205
206 code = krb5_c_decrypt(context, key, usage, pivd, &inputd, &outputd);
207 if (pivd != NULL)
208 krb5_free_data_contents(context, pivd);
209
210 KRB5_LOG(KRB5_INFO, "kg_decrypt() end. code = %d", code);
211 return code;
212 }
213
214 krb5_error_code
kg_arcfour_docrypt(krb5_context context,const krb5_keyblock * longterm_key,int ms_usage,const unsigned char * kd_data,size_t kd_data_len,const unsigned char * input_buf,size_t input_len,unsigned char * output_buf)215 kg_arcfour_docrypt (krb5_context context,
216 const krb5_keyblock *longterm_key , int ms_usage,
217 const unsigned char *kd_data, size_t kd_data_len,
218 const unsigned char *input_buf, size_t input_len,
219 unsigned char *output_buf)
220 {
221 krb5_error_code code;
222 krb5_data input, output;
223 krb5_keyblock seq_enc_key, usage_key;
224 unsigned char t[4];
225
226 KRB5_LOG0(KRB5_INFO, "kg_arcfour_docrypt() start");
227
228 bzero(&usage_key, sizeof(krb5_keyblock));
229 bzero(&seq_enc_key, sizeof(krb5_keyblock));
230
231 usage_key.length = longterm_key->length;
232 usage_key.contents = MALLOC(usage_key.length);
233 usage_key.enctype = longterm_key->enctype;
234 usage_key.dk_list = NULL;
235 #ifdef _KERNEL
236
237 usage_key.kef_mt = longterm_key->kef_mt;
238 code = init_key_kef(longterm_key->kef_mt, &usage_key);
239 if (code)
240 return (code);
241 #endif /* _KERNEL */
242 if (usage_key.contents == NULL)
243 return (ENOMEM);
244 seq_enc_key.length = longterm_key->length;
245 seq_enc_key.contents = MALLOC(seq_enc_key.length);
246 seq_enc_key.enctype = longterm_key->enctype;
247 seq_enc_key.dk_list = NULL;
248 #ifdef _KERNEL
249 seq_enc_key.kef_mt = longterm_key->kef_mt;
250 code = init_key_kef(longterm_key->kef_mt, &seq_enc_key);
251 if (code)
252 return (code);
253 #endif /* _KERNEL */
254 if (seq_enc_key.contents == NULL) {
255 FREE ((void *) usage_key.contents, usage_key.length);
256 return (ENOMEM);
257 }
258
259 t[0] = ms_usage &0xff;
260 t[1] = (ms_usage>>8) & 0xff;
261 t[2] = (ms_usage>>16) & 0xff;
262 t[3] = (ms_usage>>24) & 0xff;
263 input.data = (void *) &t;
264 input.length = 4;
265 output.data = (void *) usage_key.contents;
266 output.length = usage_key.length;
267 #ifdef _KERNEL
268 code = krb5_hmac(context, longterm_key, &input, &output);
269 #else
270 code = krb5_hmac(context, &krb5int_hash_md5,
271 longterm_key, 1, &input, &output);
272 #endif /* _KERNEL */
273 if (code)
274 goto cleanup_arcfour;
275
276 input.data = ( void *) kd_data;
277 input.length = kd_data_len;
278 output.data = (void *) seq_enc_key.contents;
279 #ifdef _KERNEL
280 code = krb5_hmac(context, &usage_key, &input, &output);
281 #else
282 code = krb5_hmac(context, &krb5int_hash_md5,
283 &usage_key, 1, &input, &output);
284 #endif /* _KERNEL */
285
286 if (code)
287 goto cleanup_arcfour;
288 input.data = ( void * ) input_buf;
289 input.length = input_len;
290 output.data = (void * ) output_buf;
291 output.length = input_len;
292
293 /*
294 * Call the arcfour encryption method directly here, we cannot
295 * use the standard "krb5_c_encrypt" interface because we just
296 * want the arcfour algorithm applied and not the additional MD5-HMAC
297 * which are applied when using the standard interface.
298 */
299 code = krb5int_enc_arcfour.encrypt(context, &seq_enc_key, 0, &input, &output);
300
301 cleanup_arcfour:
302 bzero ((void *) seq_enc_key.contents, seq_enc_key.length);
303 bzero ((void *) usage_key.contents, usage_key.length);
304 FREE ((void *) usage_key.contents, usage_key.length);
305 FREE ((void *) seq_enc_key.contents, seq_enc_key.length);
306
307 KRB5_LOG(KRB5_INFO, "kg_arcfour_docrypt() end code = %d", code);
308 return (code);
309 }
310
311