ed4b1be5bb
kadm5_get_principals() is not online. If you have... many principals,
it will be slow. At least it's no longer quadratic, but it, it's still
slow. Time to add a version that uses a callback:
kadm5_ret_t
kadm5_iter_principals(void *server_handle,
const char *expression,
int (*cb)(void *, const char *),
void *cbdata)
The callback gets called with the given callback data and one principal
name (unparsed).
Note that the callback MUST NOT re-enter the kadm5 library with the
*same* kadm handle. For example, the kadmin protocol doesn't really
multiplex requests well, though it could pipeline them, but it can't
pipeline when LIST is running, not with the protocol implemented here,
so a separate connection is needed, and that requires a separate kadm
handle. We add kadm5_dup_context() to deal with this.
296 lines
8.2 KiB
C
296 lines
8.2 KiB
C
/*
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* Copyright (c) 1997 - 1999 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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RCSID("$Id$");
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kadm5_ret_t
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kadm5_c_get_principals(void *server_handle,
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const char *expression,
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char ***princs,
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int *count)
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{
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kadm5_client_context *context = server_handle;
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kadm5_ret_t ret;
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krb5_storage *sp;
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unsigned char buf[1024];
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int32_t tmp;
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krb5_data reply;
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int i;
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*count = 0;
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*princs = NULL;
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ret = _kadm5_connect(server_handle, 0 /* want_write */);
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if (ret)
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return ret;
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krb5_data_zero(&reply);
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sp = krb5_storage_from_mem(buf, sizeof(buf));
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if (sp == NULL) {
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ret = krb5_enomem(context->context);
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goto out_keep_error;
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}
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ret = krb5_store_int32(sp, kadm_get_princs);
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if (ret)
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goto out;
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ret = krb5_store_int32(sp, expression != NULL ? 1 : 0);
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if (ret)
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goto out;
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if (expression) {
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ret = krb5_store_string(sp, expression);
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if (ret)
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goto out;
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}
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ret = _kadm5_client_send(context, sp);
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if (ret)
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goto out_keep_error;
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ret = _kadm5_client_recv(context, &reply);
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if (ret)
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goto out_keep_error;
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krb5_storage_free(sp);
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sp = krb5_storage_from_data (&reply);
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if (sp == NULL) {
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ret = krb5_enomem(context->context);
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goto out_keep_error;
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}
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ret = krb5_ret_int32(sp, &tmp);
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if (ret == 0)
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ret = tmp;
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if (ret)
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goto out;
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ret = krb5_ret_int32(sp, &tmp);
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if (ret)
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goto out;
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*princs = calloc(tmp + 1, sizeof(**princs));
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if (*princs == NULL) {
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ret = krb5_enomem(context->context);
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goto out_keep_error;
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}
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for (i = 0; i < tmp; i++) {
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ret = krb5_ret_string(sp, &(*princs)[i]);
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if (ret)
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goto out;
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}
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*count = tmp;
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out:
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krb5_clear_error_message(context->context);
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out_keep_error:
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krb5_storage_free(sp);
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krb5_data_free(&reply);
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return ret;
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}
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kadm5_ret_t
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kadm5_c_iter_principals(void *server_handle,
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const char *expression,
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int (*cb)(void *, const char *),
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void *cbdata)
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{
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kadm5_client_context *context = server_handle;
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kadm5_ret_t ret;
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krb5_storage *sp;
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unsigned char buf[1024];
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int32_t tmp;
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krb5_data reply;
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size_t i;
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ret = _kadm5_connect(server_handle, 0 /* want_write */);
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if (ret)
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return ret;
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krb5_data_zero(&reply);
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sp = krb5_storage_from_mem(buf, sizeof(buf));
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if (sp == NULL) {
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ret = krb5_enomem(context->context);
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goto out_keep_error;
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}
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ret = krb5_store_int32(sp, kadm_get_princs);
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if (ret)
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goto out;
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/*
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* Our protocol has an int boolean for this operation to indicate whether
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* there's an expression. What we'll do here is that instead of sending
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* just false or trueish, for online iteration we'll send a number other
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* than 0 or 1 -- a magic value > 0 and < INT_MAX.
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*
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* In response we'll expect multiple replies, each with up to some small
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* number of principal names. See kadmin/server.c.
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*/
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ret = krb5_store_int32(sp, 0x55555555);
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if (ret)
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goto out;
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ret = krb5_store_string(sp, expression ? expression : "");
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if (ret)
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goto out;
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ret = _kadm5_client_send(context, sp);
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if (ret)
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goto out_keep_error;
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ret = _kadm5_client_recv(context, &reply);
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if (ret)
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goto out_keep_error;
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krb5_storage_free(sp);
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sp = krb5_storage_from_data (&reply);
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if (sp == NULL) {
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ret = krb5_enomem(context->context);
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goto out_keep_error;
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}
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ret = krb5_ret_int32(sp, &tmp);
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if (ret == 0)
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ret = tmp;
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if (ret)
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goto out;
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ret = krb5_ret_int32(sp, &tmp);
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if (ret)
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goto out;
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if (tmp < 0) {
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size_t n = -tmp;
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int more = 1;
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int stop = 0;
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/* The server supports online iteration, hooray! */
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while (more) {
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/*
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* We expect any number of chunks, each having `n' names, except
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* the last one would have fewer than `n' (possibly zero, even).
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*
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* After that we expect one more reply with just a final return
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* code.
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*/
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krb5_data_free(&reply);
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krb5_storage_free(sp);
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sp = NULL;
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ret = _kadm5_client_recv(context, &reply);
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if (ret == 0 && (sp = krb5_storage_from_data(&reply)) == NULL)
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ret = krb5_enomem(context->context);
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if (ret)
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goto out;
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/* Every chunk begins with a status code */
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ret = krb5_ret_int32(sp, &tmp);
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if (ret == 0)
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ret = tmp;
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if (ret)
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goto out;
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/* We expect up to -tmp principals per reply */
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for (i = 0; i < n; i++) {
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char *princ = NULL;
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ret = krb5_ret_string(sp, &princ);
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if (ret == HEIM_ERR_EOF) {
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/* This was the last reply */
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more = 0;
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ret = 0;
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break;
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}
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if (ret)
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goto out;
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if (!stop) {
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stop = cb(cbdata, princ);
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if (stop) {
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/* Tell the server to stop */
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krb5_storage_free(sp);
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if ((sp = krb5_storage_emem()) &&
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krb5_store_int32(sp, kadm_nop) == 0)
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(void) _kadm5_client_send(context, sp);
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}
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}
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free(princ);
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}
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if (!more) {
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if (ret == 0)
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ret = stop;
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break;
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}
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}
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/* Get the final result code */
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krb5_data_free(&reply);
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krb5_storage_free(sp);
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sp = NULL;
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ret = _kadm5_client_recv(context, &reply);
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if (ret == 0 && (sp = krb5_storage_from_data(&reply)) == NULL)
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ret = krb5_enomem(context->context);
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if (ret)
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goto out;
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ret = krb5_ret_int32(sp, &tmp);
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if (ret == 0)
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ret = tmp;
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if (!stop) {
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/*
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* Send our "interrupt" after the last chunk if we hand't
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* interrupted already.
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*/
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krb5_storage_free(sp);
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if ((sp = krb5_storage_emem()) &&
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krb5_store_int32(sp, kadm_nop) == 0)
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(void) _kadm5_client_send(context, sp);
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}
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} else {
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size_t n = tmp;
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/* Old server -- listing not online */
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for (i = 0; i < n; i++) {
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char *princ = NULL;
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ret = krb5_ret_string(sp, &princ);
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if (ret)
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goto out;
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cb(cbdata, princ);
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free(princ);
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}
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}
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out:
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krb5_clear_error_message(context->context);
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out_keep_error:
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krb5_storage_free(sp);
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krb5_data_free(&reply);
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return ret;
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}
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