2 * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
34 #include <krb5_locl.h>
36 RCSID("$Id: mk_priv.c 16680 2006-02-01 12:39:26Z lha $");
39 krb5_error_code KRB5_LIB_FUNCTION
40 krb5_mk_priv(krb5_context context,
41 krb5_auth_context auth_context,
42 const krb5_data *userdata,
44 krb5_replay_data *outdata)
54 krb5_replay_data rdata;
56 if ((auth_context->flags &
57 (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
59 return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
61 if (auth_context->local_subkey)
62 key = auth_context->local_subkey;
63 else if (auth_context->remote_subkey)
64 key = auth_context->remote_subkey;
66 key = auth_context->keyblock;
68 memset(&rdata, 0, sizeof(rdata));
70 part.user_data = *userdata;
72 krb5_us_timeofday (context, &rdata.timestamp, &rdata.usec);
74 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
75 part.timestamp = &rdata.timestamp;
76 part.usec = &rdata.usec;
78 part.timestamp = NULL;
82 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_TIME) {
83 outdata->timestamp = rdata.timestamp;
84 outdata->usec = rdata.usec;
87 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
88 rdata.seq = auth_context->local_seqnumber;
89 part.seq_number = &rdata.seq;
91 part.seq_number = NULL;
93 if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)
94 outdata->seq = auth_context->local_seqnumber;
96 part.s_address = auth_context->local_address;
97 part.r_address = auth_context->remote_address;
99 krb5_data_zero (&s.enc_part.cipher);
101 ASN1_MALLOC_ENCODE(EncKrbPrivPart, buf, buf_size, &part, &len, ret);
105 krb5_abortx(context, "internal error in ASN.1 encoder");
108 s.msg_type = krb_priv;
109 s.enc_part.etype = key->keytype;
110 s.enc_part.kvno = NULL;
112 ret = krb5_crypto_init(context, key, 0, &crypto);
117 ret = krb5_encrypt (context,
120 buf + buf_size - len,
123 krb5_crypto_destroy(context, crypto);
131 ASN1_MALLOC_ENCODE(KRB_PRIV, buf, buf_size, &s, &len, ret);
135 krb5_abortx(context, "internal error in ASN.1 encoder");
137 krb5_data_free (&s.enc_part.cipher);
139 ret = krb5_data_copy(outbuf, buf + buf_size - len, len);
141 krb5_set_error_string (context, "malloc: out of memory");
146 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
147 auth_context->local_seqnumber =
148 (auth_context->local_seqnumber + 1) & 0xFFFFFFFF;
153 krb5_data_free (&s.enc_part.cipher);