5447b81fb1
This is a large commit that adds several features: - Revamps and moves virtual host-based service principal functionality from kdc/ to lib/hdb/ so that it may be automatically visible to lib/kadm5/, as well as kadmin(1)/kadmind(8) and ktutil(1). The changes are backwards-incompatible. - Completes support for documenting a service principal's supported enctypes in its HDB entry independently of its long-term keys. This will reduce HDB bloat by not requiring that service principals have more long-term keys than they need just to document the service's supported enctypes. - Adds support for storing krb5.conf content in principals' HDB entries. This may eventually be used for causing Heimdal KDC services to reconfigure primary/secondary roles automatically by discovering the configured primary in an HDB entry for the realm. For now this will be used to help reduce the amount of configuration needed by clients of an upcoming HTTP binding of the kadmin service.
221 lines
7.1 KiB
C
221 lines
7.1 KiB
C
/*
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* Copyright (c) 1997-2001, 2003, 2005-2006 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 "kadm5_locl.h"
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struct setkey_principal_hook_ctx {
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kadm5_server_context *context;
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enum kadm5_hook_stage stage;
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krb5_error_code code;
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krb5_const_principal princ;
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uint32_t flags;
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size_t n_ks_tuple;
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krb5_key_salt_tuple *ks_tuple;
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size_t n_keys;
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krb5_keyblock *keys;
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};
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static krb5_error_code KRB5_LIB_CALL
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setkey_principal_hook_cb(krb5_context context,
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const void *hook,
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void *hookctx,
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void *userctx)
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{
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krb5_error_code ret;
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const struct kadm5_hook_ftable *ftable = hook;
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struct setkey_principal_hook_ctx *ctx = userctx;
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ret = ftable->set_keys(context, hookctx,
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ctx->stage, ctx->code,
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ctx->princ, ctx->flags,
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ctx->n_ks_tuple, ctx->ks_tuple,
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ctx->n_keys, ctx->keys);
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if (ret != 0 && ret != KRB5_PLUGIN_NO_HANDLE)
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_kadm5_s_set_hook_error_message(ctx->context, ret, "setkey",
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hook, ctx->stage);
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/* only pre-commit plugins can abort */
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if (ret == 0 || ctx->stage == KADM5_HOOK_STAGE_POSTCOMMIT)
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ret = KRB5_PLUGIN_NO_HANDLE;
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return ret;
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}
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static kadm5_ret_t
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setkey_principal_hook(kadm5_server_context *context,
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enum kadm5_hook_stage stage,
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krb5_error_code code,
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krb5_const_principal princ,
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uint32_t flags,
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size_t n_ks_tuple,
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krb5_key_salt_tuple *ks_tuple,
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size_t n_keys,
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krb5_keyblock *keyblocks)
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{
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krb5_error_code ret;
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struct setkey_principal_hook_ctx ctx;
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ctx.context = context;
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ctx.stage = stage;
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ctx.code = code;
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ctx.princ = princ;
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ctx.flags = flags;
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ctx.n_ks_tuple = n_ks_tuple;
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ctx.ks_tuple = ks_tuple;
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ctx.n_keys = n_keys;
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ctx.keys = keyblocks;
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ret = _krb5_plugin_run_f(context->context, &kadm5_hook_plugin_data,
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0, &ctx, setkey_principal_hook_cb);
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if (ret == KRB5_PLUGIN_NO_HANDLE)
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ret = 0;
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return ret;
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}
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/**
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* Server-side function to set new keys for a principal.
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*/
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kadm5_ret_t
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kadm5_s_setkey_principal_3(void *server_handle,
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krb5_principal princ,
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krb5_boolean keepold,
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int n_ks_tuple,
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krb5_key_salt_tuple *ks_tuple,
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krb5_keyblock *keyblocks, int n_keys)
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{
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kadm5_server_context *context = server_handle;
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hdb_entry_ex ent;
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kadm5_ret_t ret = 0;
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size_t i;
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memset(&ent, 0, sizeof(ent));
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if (!context->keep_open)
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ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
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if (ret)
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return ret;
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ret = kadm5_log_init(context);
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if (ret) {
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if (!context->keep_open)
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context->db->hdb_close(context->context, context->db);
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return ret;
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}
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/* NOTE: We do not use hdb_fetch_kvno() here (maybe we should?) */
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ret = context->db->hdb_fetch_kvno(context->context, context->db, princ,
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HDB_F_DECRYPT|HDB_F_GET_ANY|HDB_F_ADMIN_DATA,
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0, &ent);
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if (ret) {
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(void) kadm5_log_end(context);
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if (!context->keep_open)
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context->db->hdb_close(context->context, context->db);
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return ret;
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}
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ret = setkey_principal_hook(context, KADM5_HOOK_STAGE_PRECOMMIT, 0,
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princ, keepold ? KADM5_HOOK_FLAG_KEEPOLD : 0,
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n_ks_tuple, ks_tuple, n_keys, keyblocks);
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if (ret) {
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(void) kadm5_log_end(context);
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if (!context->keep_open)
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context->db->hdb_close(context->context, context->db);
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return ret;
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}
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if (keepold) {
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ret = hdb_add_current_keys_to_history(context->context, &ent.entry);
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} else
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ret = hdb_clear_extension(context->context, &ent.entry,
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choice_HDB_extension_data_hist_keys);
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/*
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* Though in practice all real calls to this function will pass an empty
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* ks_tuple, and cannot in any case employ any salts that require
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* additional data, we go the extra mile to set any requested salt type
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* along with a zero length salt value. While we're at it we check that
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* each ks_tuple's enctype matches the corresponding key enctype.
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*/
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if (ret == 0) {
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free_Keys(&ent.entry.keys);
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for (i = 0; i < n_keys; ++i) {
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Key k;
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Salt s;
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k.mkvno = 0;
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k.key = keyblocks[i];
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if (n_ks_tuple == 0)
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k.salt = 0;
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else {
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if (ks_tuple[i].ks_enctype != keyblocks[i].keytype) {
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ret = KADM5_SETKEY3_ETYPE_MISMATCH;
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break;
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}
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s.type = ks_tuple[i].ks_salttype;
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s.salt.data = 0;
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s.opaque = 0;
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k.salt = &s;
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}
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if ((ret = add_Keys(&ent.entry.keys, &k)) != 0)
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break;
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}
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}
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if (ret == 0) {
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ent.entry.kvno++;
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ent.entry.flags.require_pwchange = 0;
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hdb_entry_set_pw_change_time(context->context, &ent.entry, 0);
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hdb_entry_clear_password(context->context, &ent.entry);
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if ((ret = hdb_seal_keys(context->context, context->db,
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&ent.entry)) == 0
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&& (ret = _kadm5_set_modifier(context, &ent.entry)) == 0
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&& (ret = _kadm5_bump_pw_expire(context, &ent.entry)) == 0)
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ret = kadm5_log_modify(context, &ent.entry,
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KADM5_ATTRIBUTES | KADM5_PRINCIPAL |
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KADM5_MOD_NAME | KADM5_MOD_TIME |
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KADM5_KEY_DATA | KADM5_KVNO |
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KADM5_PW_EXPIRATION | KADM5_TL_DATA);
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}
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(void) setkey_principal_hook(context, KADM5_HOOK_STAGE_POSTCOMMIT, ret,
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princ, keepold, n_ks_tuple, ks_tuple,
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n_keys, keyblocks);
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hdb_free_entry(context->context, &ent);
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(void) kadm5_log_end(context);
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if (!context->keep_open)
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context->db->hdb_close(context->context, context->db);
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return _kadm5_error_code(ret);
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}
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