diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/rd_cred.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/rd_cred.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/rd_cred.c b/crypto/heimdal/lib/krb5/rd_cred.c new file mode 100644 index 0000000..c330791 --- /dev/null +++ b/crypto/heimdal/lib/krb5/rd_cred.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 1997 - 1999 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_cred.c,v 1.8 1999/12/02 17:05:12 joda Exp $"); + +krb5_error_code +krb5_rd_cred (krb5_context context, + krb5_auth_context auth_context, + krb5_ccache ccache, + krb5_data *in_data) +{ + krb5_error_code ret; + size_t len; + KRB_CRED cred; + EncKrbCredPart enc_krb_cred_part; + krb5_data enc_krb_cred_part_data; + krb5_crypto crypto; + int i; + + ret = decode_KRB_CRED (in_data->data, in_data->length, + &cred, &len); + if (ret) + return ret; + + if (cred.pvno != 5) { + ret = KRB5KRB_AP_ERR_BADVERSION; + goto out; + } + + if (cred.msg_type != krb_cred) { + ret = KRB5KRB_AP_ERR_MSG_TYPE; + goto out; + } + + krb5_crypto_init(context, auth_context->remote_subkey, 0, &crypto); + ret = krb5_decrypt_EncryptedData(context, + crypto, + KRB5_KU_KRB_CRED, + &cred.enc_part, + &enc_krb_cred_part_data); + krb5_crypto_destroy(context, crypto); + if (ret) + goto out; + + + ret = krb5_decode_EncKrbCredPart (context, + enc_krb_cred_part_data.data, + enc_krb_cred_part_data.length, + &enc_krb_cred_part, + &len); + if (ret) + goto out; + + /* check sender address */ + + if (enc_krb_cred_part.s_address + && auth_context->remote_address) { + krb5_address *a; + int cmp; + + ret = krb5_make_addrport (&a, + auth_context->remote_address, + auth_context->remote_port); + if (ret) + goto out; + + + cmp = krb5_address_compare (context, + a, + enc_krb_cred_part.s_address); + + krb5_free_address (context, a); + free (a); + + if (cmp == 0) { + ret = KRB5KRB_AP_ERR_BADADDR; + goto out; + } + } + + /* check receiver address */ + + if (enc_krb_cred_part.r_address + && !krb5_address_compare (context, + auth_context->local_address, + enc_krb_cred_part.r_address)) { + ret = KRB5KRB_AP_ERR_BADADDR; + goto out; + } + + /* check timestamp */ + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) { + int32_t sec; + + krb5_timeofday (context, &sec); + + if (enc_krb_cred_part.timestamp == NULL || + enc_krb_cred_part.usec == NULL || + abs(*enc_krb_cred_part.timestamp - sec) + > context->max_skew) { + ret = KRB5KRB_AP_ERR_SKEW; + goto out; + } + } + + /* XXX - check replay cache */ + + /* Store the creds in the ccache */ + + for (i = 0; i < enc_krb_cred_part.ticket_info.len; ++i) { + KrbCredInfo *kci = &enc_krb_cred_part.ticket_info.val[i]; + krb5_creds creds; + u_char buf[1024]; + size_t len; + + memset (&creds, 0, sizeof(creds)); + + ret = encode_Ticket (buf + sizeof(buf) - 1, sizeof(buf), + &cred.tickets.val[i], + &len); + if (ret) + goto out; + krb5_data_copy (&creds.ticket, buf + sizeof(buf) - len, len); + copy_EncryptionKey (&kci->key, &creds.session); + if (kci->prealm && kci->pname) + principalname2krb5_principal (&creds.client, + *kci->pname, + *kci->prealm); + if (kci->flags) + creds.flags.b = *kci->flags; + if (kci->authtime) + creds.times.authtime = *kci->authtime; + if (kci->starttime) + creds.times.starttime = *kci->starttime; + if (kci->endtime) + creds.times.endtime = *kci->endtime; + if (kci->renew_till) + creds.times.renew_till = *kci->renew_till; + if (kci->srealm && kci->sname) + principalname2krb5_principal (&creds.server, + *kci->sname, + *kci->srealm); + if (kci->caddr) + krb5_copy_addresses (context, + kci->caddr, + &creds.addresses); + krb5_cc_store_cred (context, ccache, &creds); + } + +out: + free_KRB_CRED (&cred); + return ret; +} |
