156 lines
4.6 KiB
C
156 lines
4.6 KiB
C
/*
|
|
* Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <krb5_locl.h>
|
|
|
|
RCSID("$Id: mk_priv.c 16680 2006-02-01 12:39:26Z lha $");
|
|
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_mk_priv(krb5_context context,
|
|
krb5_auth_context auth_context,
|
|
const krb5_data *userdata,
|
|
krb5_data *outbuf,
|
|
krb5_replay_data *outdata)
|
|
{
|
|
krb5_error_code ret;
|
|
KRB_PRIV s;
|
|
EncKrbPrivPart part;
|
|
u_char *buf = NULL;
|
|
size_t buf_size;
|
|
size_t len;
|
|
krb5_crypto crypto;
|
|
krb5_keyblock *key;
|
|
krb5_replay_data rdata;
|
|
|
|
if ((auth_context->flags &
|
|
(KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
|
|
outdata == NULL)
|
|
return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
|
|
|
|
if (auth_context->local_subkey)
|
|
key = auth_context->local_subkey;
|
|
else if (auth_context->remote_subkey)
|
|
key = auth_context->remote_subkey;
|
|
else
|
|
key = auth_context->keyblock;
|
|
|
|
memset(&rdata, 0, sizeof(rdata));
|
|
|
|
part.user_data = *userdata;
|
|
|
|
krb5_us_timeofday (context, &rdata.timestamp, &rdata.usec);
|
|
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
|
|
part.timestamp = &rdata.timestamp;
|
|
part.usec = &rdata.usec;
|
|
} else {
|
|
part.timestamp = NULL;
|
|
part.usec = NULL;
|
|
}
|
|
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_TIME) {
|
|
outdata->timestamp = rdata.timestamp;
|
|
outdata->usec = rdata.usec;
|
|
}
|
|
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
|
|
rdata.seq = auth_context->local_seqnumber;
|
|
part.seq_number = &rdata.seq;
|
|
} else
|
|
part.seq_number = NULL;
|
|
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)
|
|
outdata->seq = auth_context->local_seqnumber;
|
|
|
|
part.s_address = auth_context->local_address;
|
|
part.r_address = auth_context->remote_address;
|
|
|
|
krb5_data_zero (&s.enc_part.cipher);
|
|
|
|
ASN1_MALLOC_ENCODE(EncKrbPrivPart, buf, buf_size, &part, &len, ret);
|
|
if (ret)
|
|
goto fail;
|
|
if (buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
s.pvno = 5;
|
|
s.msg_type = krb_priv;
|
|
s.enc_part.etype = key->keytype;
|
|
s.enc_part.kvno = NULL;
|
|
|
|
ret = krb5_crypto_init(context, key, 0, &crypto);
|
|
if (ret) {
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
ret = krb5_encrypt (context,
|
|
crypto,
|
|
KRB5_KU_KRB_PRIV,
|
|
buf + buf_size - len,
|
|
len,
|
|
&s.enc_part.cipher);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret) {
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
free(buf);
|
|
|
|
|
|
ASN1_MALLOC_ENCODE(KRB_PRIV, buf, buf_size, &s, &len, ret);
|
|
if (ret)
|
|
goto fail;
|
|
if (buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
krb5_data_free (&s.enc_part.cipher);
|
|
|
|
ret = krb5_data_copy(outbuf, buf + buf_size - len, len);
|
|
if (ret) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
free(buf);
|
|
return ENOMEM;
|
|
}
|
|
free (buf);
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
|
|
auth_context->local_seqnumber =
|
|
(auth_context->local_seqnumber + 1) & 0xFFFFFFFF;
|
|
return 0;
|
|
|
|
fail:
|
|
free (buf);
|
|
krb5_data_free (&s.enc_part.cipher);
|
|
return ret;
|
|
}
|