diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/rd_priv.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/rd_priv.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/rd_priv.c b/crypto/heimdal/lib/krb5/rd_priv.c new file mode 100644 index 0000000..0bc8564 --- /dev/null +++ b/crypto/heimdal/lib/krb5/rd_priv.c @@ -0,0 +1,150 @@ +/* + * Copyright (c) 1997, 1998 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: rd_priv.c,v 1.22 1999/12/02 17:05:12 joda Exp $"); + +krb5_error_code +krb5_rd_priv(krb5_context context, + krb5_auth_context auth_context, + const krb5_data *inbuf, + krb5_data *outbuf, + /*krb5_replay_data*/ void *outdata) +{ + krb5_error_code ret; + KRB_PRIV priv; + EncKrbPrivPart part; + size_t len; + krb5_data plain; + krb5_keyblock *key; + krb5_crypto crypto; + + memset(&priv, 0, sizeof(priv)); + ret = decode_KRB_PRIV (inbuf->data, inbuf->length, &priv, &len); + if (ret) + goto failure; + if (priv.pvno != 5) { + ret = KRB5KRB_AP_ERR_BADVERSION; + goto failure; + } + if (priv.msg_type != krb_priv) { + ret = KRB5KRB_AP_ERR_MSG_TYPE; + goto failure; + } + + /* XXX - Is this right? */ + + 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; + + krb5_crypto_init(context, key, 0, &crypto); + ret = krb5_decrypt_EncryptedData(context, + crypto, + KRB5_KU_KRB_PRIV, + &priv.enc_part, + &plain); + krb5_crypto_destroy(context, crypto); + if (ret) + goto failure; + + ret = decode_EncKrbPrivPart (plain.data, plain.length, &part, &len); + krb5_data_free (&plain); + if (ret) + goto failure; + + /* check sender address */ + + if (part.s_address + && auth_context->remote_address + && !krb5_address_compare (context, + auth_context->remote_address, + part.s_address)) { + ret = KRB5KRB_AP_ERR_BADADDR; + goto failure_part; + } + + /* check receiver address */ + + if (part.r_address + && auth_context->local_address + && !krb5_address_compare (context, + auth_context->local_address, + part.r_address)) { + ret = KRB5KRB_AP_ERR_BADADDR; + goto failure_part; + } + + /* check timestamp */ + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) { + int32_t sec; + + krb5_timeofday (context, &sec); + if (part.timestamp == NULL || + part.usec == NULL || + abs(*part.timestamp - sec) > context->max_skew) { + ret = KRB5KRB_AP_ERR_SKEW; + goto failure_part; + } + } + + /* XXX - check replay cache */ + + /* check sequence number */ + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { + if (part.seq_number == NULL || + *part.seq_number != ++auth_context->remote_seqnumber) { + ret = KRB5KRB_AP_ERR_BADORDER; + goto failure_part; + } + } + + ret = krb5_data_copy (outbuf, part.user_data.data, part.user_data.length); + if (ret) + goto failure_part; + + free_EncKrbPrivPart (&part); + free_KRB_PRIV (&priv); + return 0; + +failure_part: + free_EncKrbPrivPart (&part); + +failure: + free_KRB_PRIV (&priv); + return ret; +} |
