1/*
| 1/*
|
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan
| 2 * Copyright (c) 1997 - 2002 Kungliga Tekniska H�gskolan
|
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 <krb5_locl.h>
35
| 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 <krb5_locl.h>
35
|
36RCSID("$Id: mk_safe.c,v 1.27 2001/06/18 02:45:15 assar Exp $");
| 36RCSID("$Id: mk_safe.c,v 1.28 2002/09/04 16:26:05 joda Exp $");
|
37
38krb5_error_code
39krb5_mk_safe(krb5_context context,
40 krb5_auth_context auth_context,
41 const krb5_data *userdata,
42 krb5_data *outbuf,
43 /*krb5_replay_data*/ void *outdata)
44{
45 krb5_error_code ret;
46 KRB_SAFE s;
47 int32_t sec, usec;
48 KerberosTime sec2;
49 int usec2;
50 u_char *buf = NULL;
| 37
38krb5_error_code
39krb5_mk_safe(krb5_context context,
40 krb5_auth_context auth_context,
41 const krb5_data *userdata,
42 krb5_data *outbuf,
43 /*krb5_replay_data*/ void *outdata)
44{
45 krb5_error_code ret;
46 KRB_SAFE s;
47 int32_t sec, usec;
48 KerberosTime sec2;
49 int usec2;
50 u_char *buf = NULL;
|
51 void *tmp;
| |
52 size_t buf_size;
53 size_t len;
54 u_int32_t tmp_seq;
55 krb5_crypto crypto;
56 krb5_keyblock *key;
57
58 if (auth_context->local_subkey)
59 key = auth_context->local_subkey;
60 else if (auth_context->remote_subkey)
61 key = auth_context->remote_subkey;
62 else
63 key = auth_context->keyblock;
64
65 s.pvno = 5;
66 s.msg_type = krb_safe;
67
68 s.safe_body.user_data = *userdata;
69 krb5_us_timeofday (context, &sec, &usec);
70
71 sec2 = sec;
72 s.safe_body.timestamp = &sec2;
73 usec2 = usec2;
74 s.safe_body.usec = &usec2;
75 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
76 tmp_seq = auth_context->local_seqnumber;
77 s.safe_body.seq_number = &tmp_seq;
78 } else
79 s.safe_body.seq_number = NULL;
80
81 s.safe_body.s_address = auth_context->local_address;
82 s.safe_body.r_address = auth_context->remote_address;
83
84 s.cksum.cksumtype = 0;
85 s.cksum.checksum.data = NULL;
86 s.cksum.checksum.length = 0;
87
| 51 size_t buf_size;
52 size_t len;
53 u_int32_t tmp_seq;
54 krb5_crypto crypto;
55 krb5_keyblock *key;
56
57 if (auth_context->local_subkey)
58 key = auth_context->local_subkey;
59 else if (auth_context->remote_subkey)
60 key = auth_context->remote_subkey;
61 else
62 key = auth_context->keyblock;
63
64 s.pvno = 5;
65 s.msg_type = krb_safe;
66
67 s.safe_body.user_data = *userdata;
68 krb5_us_timeofday (context, &sec, &usec);
69
70 sec2 = sec;
71 s.safe_body.timestamp = &sec2;
72 usec2 = usec2;
73 s.safe_body.usec = &usec2;
74 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
75 tmp_seq = auth_context->local_seqnumber;
76 s.safe_body.seq_number = &tmp_seq;
77 } else
78 s.safe_body.seq_number = NULL;
79
80 s.safe_body.s_address = auth_context->local_address;
81 s.safe_body.r_address = auth_context->remote_address;
82
83 s.cksum.cksumtype = 0;
84 s.cksum.checksum.data = NULL;
85 s.cksum.checksum.length = 0;
86
|
88 buf_size = length_KRB_SAFE(&s);
89 buf = malloc(buf_size + 128); /* add some for checksum */
90 if(buf == NULL) {
91 krb5_set_error_string (context, "malloc: out of memory");
92 return ENOMEM;
93 }
94 ret = encode_KRB_SAFE (buf + buf_size - 1, buf_size, &s, &len);
95 if (ret) {
96 free (buf);
| 87 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
88 if (ret)
|
97 return ret;
| 89 return ret;
|
98 }
| 90 if(buf_size != len)
91 krb5_abortx(context, "internal error in ASN.1 encoder");
|
99 ret = krb5_crypto_init(context, key, 0, &crypto);
100 if (ret) {
101 free (buf);
102 return ret;
103 }
104 ret = krb5_create_checksum(context,
105 crypto,
106 KRB5_KU_KRB_SAFE_CKSUM,
107 0,
| 92 ret = krb5_crypto_init(context, key, 0, &crypto);
93 if (ret) {
94 free (buf);
95 return ret;
96 }
97 ret = krb5_create_checksum(context,
98 crypto,
99 KRB5_KU_KRB_SAFE_CKSUM,
100 0,
|
108 buf + buf_size - len,
| 101 buf,
|
109 len,
110 &s.cksum);
111 krb5_crypto_destroy(context, crypto);
112 if (ret) {
113 free (buf);
114 return ret;
115 }
116
| 102 len,
103 &s.cksum);
104 krb5_crypto_destroy(context, crypto);
105 if (ret) {
106 free (buf);
107 return ret;
108 }
109
|
117 buf_size = length_KRB_SAFE(&s);
118 tmp = realloc(buf, buf_size);
119 if(tmp == NULL) {
120 free(buf);
121 krb5_set_error_string (context, "malloc: out of memory");
122 return ENOMEM;
123 }
124 buf = tmp;
125
126 ret = encode_KRB_SAFE (buf + buf_size - 1, buf_size, &s, &len);
| 110 free(buf);
111 ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
|
127 free_Checksum (&s.cksum);
| 112 free_Checksum (&s.cksum);
|
| 113 if(ret)
114 return ret;
115 if(buf_size != len)
116 krb5_abortx(context, "internal error in ASN.1 encoder");
|
128
129 outbuf->length = len;
| 117
118 outbuf->length = len;
|
130 outbuf->data = malloc (len);
131 if (outbuf->data == NULL) {
132 free (buf);
133 krb5_set_error_string (context, "malloc: out of memory");
134 return ENOMEM;
135 }
136 memcpy (outbuf->data, buf + buf_size - len, len);
137 free (buf);
| 119 outbuf->data = buf;
|
138 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
139 auth_context->local_seqnumber =
140 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;
141 return 0;
142}
| 120 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
121 auth_context->local_seqnumber =
122 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;
123 return 0;
124}
|