several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
809 lines
20 KiB
C
809 lines
20 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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#define KRB5_KT_VNO_1 1
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#define KRB5_KT_VNO_2 2
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#define KRB5_KT_VNO KRB5_KT_VNO_2
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#define KRB5_KT_FL_JAVA 1
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/* file operations -------------------------------------------- */
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struct fkt_data {
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char *filename;
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int flags;
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};
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static krb5_error_code
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krb5_kt_ret_data(krb5_context context,
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krb5_storage *sp,
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krb5_data *data)
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{
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int ret;
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int16_t size;
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ret = krb5_ret_int16(sp, &size);
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if(ret)
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return ret;
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data->length = size;
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data->data = malloc(size);
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if (data->data == NULL) {
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krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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ret = krb5_storage_read(sp, data->data, size);
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if(ret != size)
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return (ret < 0)? errno : KRB5_KT_END;
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return 0;
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}
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static krb5_error_code
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krb5_kt_ret_string(krb5_context context,
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krb5_storage *sp,
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heim_general_string *data)
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{
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int ret;
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int16_t size;
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ret = krb5_ret_int16(sp, &size);
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if(ret)
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return ret;
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*data = malloc(size + 1);
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if (*data == NULL) {
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krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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ret = krb5_storage_read(sp, *data, size);
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(*data)[size] = '\0';
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if(ret != size)
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return (ret < 0)? errno : KRB5_KT_END;
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return 0;
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}
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static krb5_error_code
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krb5_kt_store_data(krb5_context context,
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krb5_storage *sp,
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krb5_data data)
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{
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int ret;
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ret = krb5_store_int16(sp, data.length);
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if(ret < 0)
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return ret;
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ret = krb5_storage_write(sp, data.data, data.length);
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if(ret != (int)data.length){
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if(ret < 0)
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return errno;
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return KRB5_KT_END;
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}
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return 0;
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}
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static krb5_error_code
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krb5_kt_store_string(krb5_storage *sp,
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heim_general_string data)
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{
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int ret;
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size_t len = strlen(data);
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ret = krb5_store_int16(sp, len);
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if(ret < 0)
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return ret;
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ret = krb5_storage_write(sp, data, len);
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if(ret != (int)len){
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if(ret < 0)
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return errno;
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return KRB5_KT_END;
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}
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return 0;
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}
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static krb5_error_code
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krb5_kt_ret_keyblock(krb5_context context,
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struct fkt_data *fkt,
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krb5_storage *sp,
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krb5_keyblock *p)
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{
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int ret;
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int16_t tmp;
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ret = krb5_ret_int16(sp, &tmp); /* keytype + etype */
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if(ret) {
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krb5_set_error_message(context, ret,
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N_("Cant read keyblock from file %s", ""),
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fkt->filename);
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return ret;
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}
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p->keytype = tmp;
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ret = krb5_kt_ret_data(context, sp, &p->keyvalue);
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if (ret)
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krb5_set_error_message(context, ret,
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N_("Cant read keyblock from file %s", ""),
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fkt->filename);
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return ret;
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}
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static krb5_error_code
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krb5_kt_store_keyblock(krb5_context context,
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struct fkt_data *fkt,
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krb5_storage *sp,
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krb5_keyblock *p)
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{
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int ret;
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ret = krb5_store_int16(sp, p->keytype); /* keytype + etype */
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if(ret) {
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krb5_set_error_message(context, ret,
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N_("Cant store keyblock to file %s", ""),
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fkt->filename);
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return ret;
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}
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ret = krb5_kt_store_data(context, sp, p->keyvalue);
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if (ret)
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krb5_set_error_message(context, ret,
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N_("Cant store keyblock to file %s", ""),
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fkt->filename);
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return ret;
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}
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static krb5_error_code
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krb5_kt_ret_principal(krb5_context context,
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struct fkt_data *fkt,
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krb5_storage *sp,
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krb5_principal *princ)
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{
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size_t i;
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int ret;
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krb5_principal p;
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int16_t len;
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ALLOC(p, 1);
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if(p == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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ret = krb5_ret_int16(sp, &len);
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if(ret) {
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krb5_set_error_message(context, ret,
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N_("Failed decoding length of "
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"keytab principal in keytab file %s", ""),
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fkt->filename);
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goto out;
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}
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if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
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len--;
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if (len < 0) {
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ret = KRB5_KT_END;
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krb5_set_error_message(context, ret,
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N_("Keytab principal contains "
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"invalid length in keytab %s", ""),
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fkt->filename);
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goto out;
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}
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ret = krb5_kt_ret_string(context, sp, &p->realm);
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if(ret) {
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krb5_set_error_message(context, ret,
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N_("Can't read realm from keytab: %s", ""),
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fkt->filename);
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goto out;
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}
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p->name.name_string.val = calloc(len, sizeof(*p->name.name_string.val));
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if(p->name.name_string.val == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto out;
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}
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p->name.name_string.len = len;
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for(i = 0; i < p->name.name_string.len; i++){
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ret = krb5_kt_ret_string(context, sp, p->name.name_string.val + i);
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if(ret) {
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krb5_set_error_message(context, ret,
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N_("Can't read principal from "
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"keytab: %s", ""),
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fkt->filename);
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goto out;
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}
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}
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if (krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE))
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p->name.name_type = KRB5_NT_UNKNOWN;
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else {
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int32_t tmp32;
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ret = krb5_ret_int32(sp, &tmp32);
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p->name.name_type = tmp32;
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if (ret) {
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krb5_set_error_message(context, ret,
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N_("Can't read name-type from "
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"keytab: %s", ""),
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fkt->filename);
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goto out;
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}
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}
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*princ = p;
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return 0;
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out:
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krb5_free_principal(context, p);
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return ret;
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}
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static krb5_error_code
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krb5_kt_store_principal(krb5_context context,
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krb5_storage *sp,
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krb5_principal p)
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{
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size_t i;
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int ret;
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if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
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ret = krb5_store_int16(sp, p->name.name_string.len + 1);
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else
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ret = krb5_store_int16(sp, p->name.name_string.len);
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if(ret) return ret;
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ret = krb5_kt_store_string(sp, p->realm);
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if(ret) return ret;
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for(i = 0; i < p->name.name_string.len; i++){
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ret = krb5_kt_store_string(sp, p->name.name_string.val[i]);
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if(ret)
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return ret;
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}
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if(!krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE)) {
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ret = krb5_store_int32(sp, p->name.name_type);
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if(ret)
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return ret;
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}
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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fkt_resolve(krb5_context context, const char *name, krb5_keytab id)
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{
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struct fkt_data *d;
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d = malloc(sizeof(*d));
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if(d == NULL) {
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krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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d->filename = strdup(name);
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if(d->filename == NULL) {
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free(d);
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krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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d->flags = 0;
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id->data = d;
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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fkt_resolve_java14(krb5_context context, const char *name, krb5_keytab id)
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{
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krb5_error_code ret;
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ret = fkt_resolve(context, name, id);
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if (ret == 0) {
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struct fkt_data *d = id->data;
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d->flags |= KRB5_KT_FL_JAVA;
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}
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return ret;
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}
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static krb5_error_code KRB5_CALLCONV
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fkt_close(krb5_context context, krb5_keytab id)
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{
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struct fkt_data *d = id->data;
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free(d->filename);
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free(d);
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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fkt_destroy(krb5_context context, krb5_keytab id)
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{
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struct fkt_data *d = id->data;
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_krb5_erase_file(context, d->filename);
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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fkt_get_name(krb5_context context,
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krb5_keytab id,
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char *name,
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size_t namesize)
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{
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/* This function is XXX */
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struct fkt_data *d = id->data;
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strlcpy(name, d->filename, namesize);
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return 0;
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}
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static void
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storage_set_flags(krb5_context context, krb5_storage *sp, int vno)
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{
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int flags = 0;
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switch(vno) {
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case KRB5_KT_VNO_1:
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flags |= KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS;
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flags |= KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE;
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flags |= KRB5_STORAGE_HOST_BYTEORDER;
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break;
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case KRB5_KT_VNO_2:
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break;
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default:
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krb5_warnx(context,
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"storage_set_flags called with bad vno (%d)", vno);
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}
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krb5_storage_set_flags(sp, flags);
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}
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static krb5_error_code
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fkt_start_seq_get_int(krb5_context context,
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krb5_keytab id,
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int flags,
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int exclusive,
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krb5_kt_cursor *c)
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{
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int8_t pvno, tag;
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krb5_error_code ret;
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struct fkt_data *d = id->data;
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c->fd = open (d->filename, flags);
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if (c->fd < 0) {
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ret = errno;
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krb5_set_error_message(context, ret,
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N_("keytab %s open failed: %s", ""),
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d->filename, strerror(ret));
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return ret;
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}
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rk_cloexec(c->fd);
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ret = _krb5_xlock(context, c->fd, exclusive, d->filename);
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if (ret) {
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close(c->fd);
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return ret;
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}
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c->sp = krb5_storage_from_fd(c->fd);
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if (c->sp == NULL) {
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_krb5_xunlock(context, c->fd);
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close(c->fd);
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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krb5_storage_set_eof_code(c->sp, KRB5_KT_END);
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ret = krb5_ret_int8(c->sp, &pvno);
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if(ret) {
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krb5_storage_free(c->sp);
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_krb5_xunlock(context, c->fd);
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close(c->fd);
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krb5_clear_error_message(context);
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return ret;
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}
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if(pvno != 5) {
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krb5_storage_free(c->sp);
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_krb5_xunlock(context, c->fd);
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close(c->fd);
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krb5_clear_error_message (context);
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return KRB5_KEYTAB_BADVNO;
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}
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ret = krb5_ret_int8(c->sp, &tag);
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if (ret) {
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krb5_storage_free(c->sp);
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_krb5_xunlock(context, c->fd);
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close(c->fd);
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krb5_clear_error_message(context);
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return ret;
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}
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id->version = tag;
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storage_set_flags(context, c->sp, id->version);
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return 0;
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}
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|
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static krb5_error_code KRB5_CALLCONV
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fkt_start_seq_get(krb5_context context,
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krb5_keytab id,
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krb5_kt_cursor *c)
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{
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return fkt_start_seq_get_int(context, id, O_RDONLY | O_BINARY | O_CLOEXEC, 0, c);
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}
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|
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static krb5_error_code
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fkt_next_entry_int(krb5_context context,
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krb5_keytab id,
|
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krb5_keytab_entry *entry,
|
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krb5_kt_cursor *cursor,
|
|
off_t *start,
|
|
off_t *end)
|
|
{
|
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struct fkt_data *d = id->data;
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|
int32_t len;
|
|
int ret;
|
|
int8_t tmp8;
|
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int32_t tmp32;
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uint32_t utmp32;
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|
off_t pos, curpos;
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|
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pos = krb5_storage_seek(cursor->sp, 0, SEEK_CUR);
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|
loop:
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|
ret = krb5_ret_int32(cursor->sp, &len);
|
|
if (ret)
|
|
return ret;
|
|
if(len < 0) {
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|
pos = krb5_storage_seek(cursor->sp, -len, SEEK_CUR);
|
|
goto loop;
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|
}
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|
ret = krb5_kt_ret_principal (context, d, cursor->sp, &entry->principal);
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|
if (ret)
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goto out;
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ret = krb5_ret_uint32(cursor->sp, &utmp32);
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entry->timestamp = utmp32;
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if (ret)
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goto out;
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ret = krb5_ret_int8(cursor->sp, &tmp8);
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|
if (ret)
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goto out;
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|
entry->vno = tmp8;
|
|
ret = krb5_kt_ret_keyblock (context, d, cursor->sp, &entry->keyblock);
|
|
if (ret)
|
|
goto out;
|
|
/* there might be a 32 bit kvno here
|
|
* if it's zero, assume that the 8bit one was right,
|
|
* otherwise trust the new value */
|
|
curpos = krb5_storage_seek(cursor->sp, 0, SEEK_CUR);
|
|
if(len + 4 + pos - curpos >= 4) {
|
|
ret = krb5_ret_int32(cursor->sp, &tmp32);
|
|
if (ret == 0 && tmp32 != 0)
|
|
entry->vno = tmp32;
|
|
}
|
|
/* there might be a flags field here */
|
|
if(len + 4 + pos - curpos >= 8) {
|
|
ret = krb5_ret_uint32(cursor->sp, &utmp32);
|
|
if (ret == 0)
|
|
entry->flags = utmp32;
|
|
} else
|
|
entry->flags = 0;
|
|
|
|
entry->aliases = NULL;
|
|
|
|
if(start) *start = pos;
|
|
if(end) *end = pos + 4 + len;
|
|
out:
|
|
krb5_storage_seek(cursor->sp, pos + 4 + len, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
fkt_next_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry,
|
|
krb5_kt_cursor *cursor)
|
|
{
|
|
return fkt_next_entry_int(context, id, entry, cursor, NULL, NULL);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
fkt_end_seq_get(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_kt_cursor *cursor)
|
|
{
|
|
krb5_storage_free(cursor->sp);
|
|
_krb5_xunlock(context, cursor->fd);
|
|
close(cursor->fd);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
fkt_setup_keytab(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_storage *sp)
|
|
{
|
|
krb5_error_code ret;
|
|
ret = krb5_store_int8(sp, 5);
|
|
if(ret)
|
|
return ret;
|
|
if(id->version == 0)
|
|
id->version = KRB5_KT_VNO;
|
|
return krb5_store_int8 (sp, id->version);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
fkt_add_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry)
|
|
{
|
|
int ret;
|
|
int fd;
|
|
krb5_storage *sp;
|
|
struct fkt_data *d = id->data;
|
|
krb5_data keytab;
|
|
int32_t len;
|
|
|
|
fd = open (d->filename, O_RDWR | O_BINARY | O_CLOEXEC);
|
|
if (fd < 0) {
|
|
fd = open (d->filename, O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC, 0600);
|
|
if (fd < 0) {
|
|
ret = errno;
|
|
krb5_set_error_message(context, ret,
|
|
N_("open(%s): %s", ""), d->filename,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
rk_cloexec(fd);
|
|
|
|
ret = _krb5_xlock(context, fd, 1, d->filename);
|
|
if (ret) {
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
sp = krb5_storage_from_fd(fd);
|
|
krb5_storage_set_eof_code(sp, KRB5_KT_END);
|
|
ret = fkt_setup_keytab(context, id, sp);
|
|
if(ret) {
|
|
goto out;
|
|
}
|
|
storage_set_flags(context, sp, id->version);
|
|
} else {
|
|
int8_t pvno, tag;
|
|
|
|
rk_cloexec(fd);
|
|
|
|
ret = _krb5_xlock(context, fd, 1, d->filename);
|
|
if (ret) {
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
sp = krb5_storage_from_fd(fd);
|
|
krb5_storage_set_eof_code(sp, KRB5_KT_END);
|
|
ret = krb5_ret_int8(sp, &pvno);
|
|
if(ret) {
|
|
/* we probably have a zero byte file, so try to set it up
|
|
properly */
|
|
ret = fkt_setup_keytab(context, id, sp);
|
|
if(ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("%s: keytab is corrupted: %s", ""),
|
|
d->filename, strerror(ret));
|
|
goto out;
|
|
}
|
|
storage_set_flags(context, sp, id->version);
|
|
} else {
|
|
if(pvno != 5) {
|
|
ret = KRB5_KEYTAB_BADVNO;
|
|
krb5_set_error_message(context, ret,
|
|
N_("Bad version in keytab %s", ""),
|
|
d->filename);
|
|
goto out;
|
|
}
|
|
ret = krb5_ret_int8 (sp, &tag);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("failed reading tag from "
|
|
"keytab %s", ""),
|
|
d->filename);
|
|
goto out;
|
|
}
|
|
id->version = tag;
|
|
storage_set_flags(context, sp, id->version);
|
|
}
|
|
}
|
|
|
|
{
|
|
krb5_storage *emem;
|
|
emem = krb5_storage_emem();
|
|
if(emem == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
goto out;
|
|
}
|
|
ret = krb5_kt_store_principal(context, emem, entry->principal);
|
|
if(ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed storing principal "
|
|
"in keytab %s", ""),
|
|
d->filename);
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_store_int32 (emem, entry->timestamp);
|
|
if(ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed storing timpstamp "
|
|
"in keytab %s", ""),
|
|
d->filename);
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_store_int8 (emem, entry->vno % 256);
|
|
if(ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed storing kvno "
|
|
"in keytab %s", ""),
|
|
d->filename);
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_kt_store_keyblock (context, d, emem, &entry->keyblock);
|
|
if(ret) {
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
if ((d->flags & KRB5_KT_FL_JAVA) == 0) {
|
|
ret = krb5_store_int32 (emem, entry->vno);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed storing extended kvno "
|
|
"in keytab %s", ""),
|
|
d->filename);
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_store_uint32 (emem, entry->flags);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed storing extended kvno "
|
|
"in keytab %s", ""),
|
|
d->filename);
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = krb5_storage_to_data(emem, &keytab);
|
|
krb5_storage_free(emem);
|
|
if(ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed converting keytab entry "
|
|
"to memory block for keytab %s", ""),
|
|
d->filename);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
while(1) {
|
|
ret = krb5_ret_int32(sp, &len);
|
|
if(ret == KRB5_KT_END) {
|
|
len = keytab.length;
|
|
break;
|
|
}
|
|
if(len < 0) {
|
|
len = -len;
|
|
if(len >= (int)keytab.length) {
|
|
krb5_storage_seek(sp, -4, SEEK_CUR);
|
|
break;
|
|
}
|
|
}
|
|
krb5_storage_seek(sp, len, SEEK_CUR);
|
|
}
|
|
ret = krb5_store_int32(sp, len);
|
|
if(krb5_storage_write(sp, keytab.data, keytab.length) < 0) {
|
|
ret = errno;
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed writing keytab block "
|
|
"in keytab %s: %s", ""),
|
|
d->filename, strerror(ret));
|
|
}
|
|
memset(keytab.data, 0, keytab.length);
|
|
krb5_data_free(&keytab);
|
|
out:
|
|
krb5_storage_free(sp);
|
|
_krb5_xunlock(context, fd);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
fkt_remove_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry)
|
|
{
|
|
krb5_keytab_entry e;
|
|
krb5_kt_cursor cursor;
|
|
off_t pos_start, pos_end;
|
|
int found = 0;
|
|
krb5_error_code ret;
|
|
|
|
ret = fkt_start_seq_get_int(context, id, O_RDWR | O_BINARY | O_CLOEXEC, 1, &cursor);
|
|
if(ret != 0)
|
|
goto out; /* return other error here? */
|
|
while(fkt_next_entry_int(context, id, &e, &cursor,
|
|
&pos_start, &pos_end) == 0) {
|
|
if(krb5_kt_compare(context, &e, entry->principal,
|
|
entry->vno, entry->keyblock.keytype)) {
|
|
int32_t len;
|
|
unsigned char buf[128];
|
|
found = 1;
|
|
krb5_storage_seek(cursor.sp, pos_start, SEEK_SET);
|
|
len = pos_end - pos_start - 4;
|
|
krb5_store_int32(cursor.sp, -len);
|
|
memset(buf, 0, sizeof(buf));
|
|
while(len > 0) {
|
|
krb5_storage_write(cursor.sp, buf,
|
|
min((size_t)len, sizeof(buf)));
|
|
len -= min((size_t)len, sizeof(buf));
|
|
}
|
|
}
|
|
krb5_kt_free_entry(context, &e);
|
|
}
|
|
krb5_kt_end_seq_get(context, id, &cursor);
|
|
out:
|
|
if (!found) {
|
|
krb5_clear_error_message (context);
|
|
return KRB5_KT_NOTFOUND;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
const krb5_kt_ops krb5_fkt_ops = {
|
|
"FILE",
|
|
fkt_resolve,
|
|
fkt_get_name,
|
|
fkt_close,
|
|
fkt_destroy,
|
|
NULL, /* get */
|
|
fkt_start_seq_get,
|
|
fkt_next_entry,
|
|
fkt_end_seq_get,
|
|
fkt_add_entry,
|
|
fkt_remove_entry
|
|
};
|
|
|
|
const krb5_kt_ops krb5_wrfkt_ops = {
|
|
"WRFILE",
|
|
fkt_resolve,
|
|
fkt_get_name,
|
|
fkt_close,
|
|
fkt_destroy,
|
|
NULL, /* get */
|
|
fkt_start_seq_get,
|
|
fkt_next_entry,
|
|
fkt_end_seq_get,
|
|
fkt_add_entry,
|
|
fkt_remove_entry
|
|
};
|
|
|
|
const krb5_kt_ops krb5_javakt_ops = {
|
|
"JAVA14",
|
|
fkt_resolve_java14,
|
|
fkt_get_name,
|
|
fkt_close,
|
|
fkt_destroy,
|
|
NULL, /* get */
|
|
fkt_start_seq_get,
|
|
fkt_next_entry,
|
|
fkt_end_seq_get,
|
|
fkt_add_entry,
|
|
fkt_remove_entry
|
|
};
|