diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/authdata.c')
| -rw-r--r-- | third_party/heimdal/lib/krb5/authdata.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/authdata.c b/third_party/heimdal/lib/krb5/authdata.c new file mode 100644 index 0000000..ac42661 --- /dev/null +++ b/third_party/heimdal/lib/krb5/authdata.c @@ -0,0 +1,124 @@ +/* + * Copyright (c) 1997-2021 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * Copyright (c) 2021 Isaac Boukris + * 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" + +/* + * Add the AuthorizationData `data´ of `type´ to the last element in + * the sequence of authorization_data in `tkt´ wrapped in an IF_RELEVANT + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +_kdc_tkt_add_if_relevant_ad(krb5_context context, + EncTicketPart *tkt, + int type, + const krb5_data *data) +{ + krb5_error_code ret; + size_t size = 0; + + if (tkt->authorization_data == NULL) { + tkt->authorization_data = calloc(1, sizeof(*tkt->authorization_data)); + if (tkt->authorization_data == NULL) { + return krb5_enomem(context); + } + } + + /* add the entry to the last element */ + { + AuthorizationData ad = { 0, NULL }; + AuthorizationDataElement ade; + + ade.ad_type = type; + ade.ad_data = *data; + + ret = add_AuthorizationData(&ad, &ade); + if (ret) { + krb5_set_error_message(context, ret, "add AuthorizationData failed"); + return ret; + } + + ade.ad_type = KRB5_AUTHDATA_IF_RELEVANT; + + ASN1_MALLOC_ENCODE(AuthorizationData, + ade.ad_data.data, ade.ad_data.length, + &ad, &size, ret); + free_AuthorizationData(&ad); + if (ret) { + krb5_set_error_message(context, ret, "ASN.1 encode of " + "AuthorizationData failed"); + return ret; + } + if (ade.ad_data.length != size) + krb5_abortx(context, "internal asn.1 encoder error"); + + ret = add_AuthorizationData(tkt->authorization_data, &ade); + der_free_octet_string(&ade.ad_data); + if (ret) { + krb5_set_error_message(context, ret, "add AuthorizationData failed"); + return ret; + } + } + + return 0; +} + +/* + * Insert a PAC wrapped in AD-IF-RELEVANT container as the first AD element, + * as some clients such as Windows may fail to parse it otherwise. + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +_kdc_tkt_insert_pac(krb5_context context, + EncTicketPart *tkt, + const krb5_data *data) +{ + AuthorizationDataElement ade; + unsigned int i; + krb5_error_code ret; + + ret = _kdc_tkt_add_if_relevant_ad(context, tkt, KRB5_AUTHDATA_WIN2K_PAC, + data); + if (ret) + return ret; + + heim_assert(tkt->authorization_data->len != 0, "No authorization_data!"); + ade = tkt->authorization_data->val[tkt->authorization_data->len - 1]; + for (i = 0; i < tkt->authorization_data->len - 1; i++) { + tkt->authorization_data->val[i + 1] = tkt->authorization_data->val[i]; + } + tkt->authorization_data->val[0] = ade; + + return 0; +} |