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440ea95b565b45c885490752c9fe4c031e6e4f90
heimdal/lib/krb5/context.c
Nicolas Williams fb553dde1d krb5: Fix warnings
2022-01-14 17:10:16 -06:00

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/*
* Copyright (c) 1997 - 2010 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2009 Apple Inc. 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.
*/
#undef KRB5_DEPRECATED_FUNCTION
#define KRB5_DEPRECATED_FUNCTION(x)
#include "krb5_locl.h"
#include <assert.h>
#include <com_err.h>
static void _krb5_init_ets(krb5_context);
#define INIT_FIELD(C, T, E, D, F) \
(C)->E = krb5_config_get_ ## T ## _default ((C), NULL, (D), \
"libdefaults", F, NULL)
#define INIT_FLAG(C, O, V, D, F) \
do { \
if (krb5_config_get_bool_default((C), NULL, (D),"libdefaults", F, NULL)) { \
(C)->O |= V; \
} \
} while(0)
static krb5_error_code
copy_enctypes(krb5_context context,
const krb5_enctype *in,
krb5_enctype **out);
/*
* Set the list of etypes `ret_etypes' from the configuration variable
* `name'
*/
static krb5_error_code
set_etypes (krb5_context context,
const char *name,
krb5_enctype **ret_enctypes)
{
char **etypes_str;
krb5_enctype *etypes = NULL;
etypes_str = krb5_config_get_strings(context, NULL, "libdefaults",
name, NULL);
if(etypes_str){
int i, j, k;
for(i = 0; etypes_str[i]; i++);
etypes = malloc((i+1) * sizeof(*etypes));
if (etypes == NULL) {
krb5_config_free_strings (etypes_str);
return krb5_enomem(context);
}
for(j = 0, k = 0; j < i; j++) {
krb5_enctype e;
if(krb5_string_to_enctype(context, etypes_str[j], &e) != 0)
continue;
if (krb5_enctype_valid(context, e) != 0)
continue;
etypes[k++] = e;
}
etypes[k] = ETYPE_NULL;
krb5_config_free_strings(etypes_str);
}
*ret_enctypes = etypes;
return 0;
}
/*
* read variables from the configuration file and set in `context'
*/
static krb5_error_code
init_context_from_config_file(krb5_context context)
{
krb5_error_code ret;
const char * tmp;
char **s;
krb5_enctype *tmptypes = NULL;
INIT_FIELD(context, time, max_skew, 5 * 60, "clockskew");
INIT_FIELD(context, time, kdc_timeout, 30, "kdc_timeout");
INIT_FIELD(context, time, host_timeout, 3, "host_timeout");
INIT_FIELD(context, int, max_retries, 3, "max_retries");
INIT_FIELD(context, string, http_proxy, NULL, "http_proxy");
ret = krb5_config_get_bool_default(context, NULL, FALSE,
"libdefaults",
"allow_weak_crypto", NULL);
if (ret) {
krb5_enctype_enable(context, ETYPE_DES_CBC_CRC);
krb5_enctype_enable(context, ETYPE_DES_CBC_MD4);
krb5_enctype_enable(context, ETYPE_DES_CBC_MD5);
krb5_enctype_enable(context, ETYPE_DES_CBC_NONE);
krb5_enctype_enable(context, ETYPE_DES_CFB64_NONE);
krb5_enctype_enable(context, ETYPE_DES_PCBC_NONE);
}
ret = set_etypes (context, "default_etypes", &tmptypes);
if(ret)
return ret;
free(context->etypes);
context->etypes = tmptypes;
/* The etypes member may change during the lifetime
* of the context. To be able to reset it to
* config value, we keep another copy.
*/
free(context->cfg_etypes);
context->cfg_etypes = NULL;
if (tmptypes) {
ret = copy_enctypes(context, tmptypes, &context->cfg_etypes);
if (ret)
return ret;
}
ret = set_etypes (context, "default_etypes_des", &tmptypes);
if(ret)
return ret;
free(context->etypes_des);
context->etypes_des = tmptypes;
ret = set_etypes (context, "default_as_etypes", &tmptypes);
if(ret)
return ret;
free(context->as_etypes);
context->as_etypes = tmptypes;
ret = set_etypes (context, "default_tgs_etypes", &tmptypes);
if(ret)
return ret;
free(context->tgs_etypes);
context->tgs_etypes = tmptypes;
ret = set_etypes (context, "permitted_enctypes", &tmptypes);
if(ret)
return ret;
free(context->permitted_enctypes);
context->permitted_enctypes = tmptypes;
INIT_FIELD(context, string, default_keytab,
KEYTAB_DEFAULT, "default_keytab_name");
INIT_FIELD(context, string, default_keytab_modify,
NULL, "default_keytab_modify_name");
INIT_FIELD(context, string, time_fmt,
"%Y-%m-%dT%H:%M:%S", "time_format");
INIT_FIELD(context, string, date_fmt,
"%Y-%m-%d", "date_format");
INIT_FIELD(context, bool, log_utc,
FALSE, "log_utc");
context->no_ticket_store =
getenv("KRB5_NO_TICKET_STORE") != NULL;
/* init dns-proxy slime */
tmp = krb5_config_get_string(context, NULL, "libdefaults",
"dns_proxy", NULL);
if(tmp)
roken_gethostby_setup(context->http_proxy, tmp);
krb5_free_host_realm (context, context->default_realms);
context->default_realms = NULL;
{
krb5_addresses addresses;
char **adr, **a;
krb5_set_extra_addresses(context, NULL);
adr = krb5_config_get_strings(context, NULL,
"libdefaults",
"extra_addresses",
NULL);
memset(&addresses, 0, sizeof(addresses));
for(a = adr; a && *a; a++) {
ret = krb5_parse_address(context, *a, &addresses);
if (ret == 0) {
krb5_add_extra_addresses(context, &addresses);
krb5_free_addresses(context, &addresses);
}
}
krb5_config_free_strings(adr);
krb5_set_ignore_addresses(context, NULL);
adr = krb5_config_get_strings(context, NULL,
"libdefaults",
"ignore_addresses",
NULL);
memset(&addresses, 0, sizeof(addresses));
for(a = adr; a && *a; a++) {
ret = krb5_parse_address(context, *a, &addresses);
if (ret == 0) {
krb5_add_ignore_addresses(context, &addresses);
krb5_free_addresses(context, &addresses);
}
}
krb5_config_free_strings(adr);
}
INIT_FIELD(context, bool, scan_interfaces, TRUE, "scan_interfaces");
INIT_FIELD(context, int, fcache_vno, 0, "fcache_version");
/* prefer dns_lookup_kdc over srv_lookup. */
INIT_FIELD(context, bool, srv_lookup, TRUE, "srv_lookup");
INIT_FIELD(context, bool, srv_lookup, context->srv_lookup, "dns_lookup_kdc");
INIT_FIELD(context, int, large_msg_size, 1400, "large_message_size");
INIT_FIELD(context, int, max_msg_size, 1000 * 1024, "maximum_message_size");
INIT_FLAG(context, flags, KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME, TRUE, "dns_canonicalize_hostname");
INIT_FLAG(context, flags, KRB5_CTX_F_CHECK_PAC, TRUE, "check_pac");
INIT_FLAG(context, flags, KRB5_CTX_F_ENFORCE_OK_AS_DELEGATE, FALSE, "enforce_ok_as_delegate");
INIT_FLAG(context, flags, KRB5_CTX_F_REPORT_CANONICAL_CLIENT_NAME, FALSE, "report_canonical_client_name");
/* report_canonical_client_name implies check_pac */
if (context->flags & KRB5_CTX_F_REPORT_CANONICAL_CLIENT_NAME)
context->flags |= KRB5_CTX_F_CHECK_PAC;
if (context->default_cc_name)
free(context->default_cc_name);
context->default_cc_name = NULL;
context->default_cc_name_set = 0;
context->configured_default_cc_name = NULL;
tmp = secure_getenv("KRB5_TRACE");
if (tmp)
heim_add_debug_dest(context->hcontext, "libkrb5", tmp);
s = krb5_config_get_strings(context, NULL, "logging", "krb5", NULL);
if (s) {
char **p;
for (p = s; *p; p++)
heim_add_debug_dest(context->hcontext, "libkrb5", *p);
krb5_config_free_strings(s);
}
tmp = krb5_config_get_string(context, NULL, "libdefaults",
"check-rd-req-server", NULL);
if (tmp == NULL)
tmp = secure_getenv("KRB5_CHECK_RD_REQ_SERVER");
if(tmp) {
if (strcasecmp(tmp, "ignore") == 0)
context->flags |= KRB5_CTX_F_RD_REQ_IGNORE;
}
ret = krb5_config_get_bool_default(context, NULL, TRUE,
"libdefaults",
"fcache_strict_checking", NULL);
if (ret)
context->flags |= KRB5_CTX_F_FCACHE_STRICT_CHECKING;
return 0;
}
static krb5_error_code
cc_ops_register(krb5_context context)
{
context->cc_ops = NULL;
context->num_cc_ops = 0;
#ifndef KCM_IS_API_CACHE
krb5_cc_register(context, &krb5_acc_ops, TRUE);
#endif
krb5_cc_register(context, &krb5_fcc_ops, TRUE);
krb5_cc_register(context, &krb5_dcc_ops, TRUE);
krb5_cc_register(context, &krb5_mcc_ops, TRUE);
#ifdef HAVE_SCC
krb5_cc_register(context, &krb5_scc_ops, TRUE);
#endif
#ifdef HAVE_KCM
#ifdef KCM_IS_API_CACHE
krb5_cc_register(context, &krb5_akcm_ops, TRUE);
#endif
krb5_cc_register(context, &krb5_kcm_ops, TRUE);
#endif
#if defined(HAVE_KEYUTILS_H)
krb5_cc_register(context, &krb5_krcc_ops, TRUE);
#endif
_krb5_load_ccache_plugins(context);
return 0;
}
static krb5_error_code
cc_ops_copy(krb5_context context, const krb5_context src_context)
{
const krb5_cc_ops **cc_ops;
context->cc_ops = NULL;
context->num_cc_ops = 0;
if (src_context->num_cc_ops == 0)
return 0;
cc_ops = malloc(sizeof(cc_ops[0]) * src_context->num_cc_ops);
if (cc_ops == NULL) {
krb5_set_error_message(context, KRB5_CC_NOMEM,
N_("malloc: out of memory", ""));
return KRB5_CC_NOMEM;
}
memcpy(rk_UNCONST(cc_ops), src_context->cc_ops,
sizeof(cc_ops[0]) * src_context->num_cc_ops);
context->cc_ops = cc_ops;
context->num_cc_ops = src_context->num_cc_ops;
return 0;
}
static krb5_error_code
kt_ops_register(krb5_context context)
{
context->num_kt_types = 0;
context->kt_types = NULL;
krb5_kt_register (context, &krb5_fkt_ops);
krb5_kt_register (context, &krb5_wrfkt_ops);
krb5_kt_register (context, &krb5_javakt_ops);
krb5_kt_register (context, &krb5_mkt_ops);
#ifndef HEIMDAL_SMALLER
krb5_kt_register (context, &krb5_akf_ops);
#endif
krb5_kt_register (context, &krb5_any_ops);
return 0;
}
static krb5_error_code
kt_ops_copy(krb5_context context, const krb5_context src_context)
{
context->num_kt_types = 0;
context->kt_types = NULL;
if (src_context->num_kt_types == 0)
return 0;
context->kt_types = malloc(sizeof(context->kt_types[0]) * src_context->num_kt_types);
if (context->kt_types == NULL)
return krb5_enomem(context);
context->num_kt_types = src_context->num_kt_types;
memcpy(context->kt_types, src_context->kt_types,
sizeof(context->kt_types[0]) * src_context->num_kt_types);
return 0;
}
static const char *sysplugin_dirs[] = {
#ifdef _WIN32
"$ORIGIN",
#else
"$ORIGIN/../lib/plugin/krb5",
#endif
#ifdef __APPLE__
LIBDIR "/plugin/krb5",
#ifdef HEIM_PLUGINS_SEARCH_SYSTEM
"/Library/KerberosPlugins/KerberosFrameworkPlugins",
"/System/Library/KerberosPlugins/KerberosFrameworkPlugins",
#endif
#endif
NULL
};
static void
init_context_once(void *ctx)
{
krb5_context context = ctx;
char **dirs;
#ifdef _WIN32
dirs = rk_UNCONST(sysplugin_dirs);
#else
dirs = krb5_config_get_strings(context, NULL, "libdefaults",
"plugin_dir", NULL);
if (dirs == NULL)
dirs = rk_UNCONST(sysplugin_dirs);
#endif
_krb5_load_plugins(context, "krb5", (const char **)dirs);
if (dirs != rk_UNCONST(sysplugin_dirs))
krb5_config_free_strings(dirs);
bindtextdomain(HEIMDAL_TEXTDOMAIN, HEIMDAL_LOCALEDIR);
}
/**
* Initializes the context structure and reads the configuration file
* /etc/krb5.conf. The structure should be freed by calling
* krb5_free_context() when it is no longer being used.
*
* @param context pointer to returned context
*
* @return Returns 0 to indicate success. Otherwise an errno code is
* returned. Failure means either that something bad happened during
* initialization (typically ENOMEM) or that Kerberos should not be
* used ENXIO. If the function returns HEIM_ERR_RANDOM_OFFLINE, the
* random source is not available and later Kerberos calls might fail.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_init_context(krb5_context *context)
{
static heim_base_once_t init_context = HEIM_BASE_ONCE_INIT;
krb5_context p;
krb5_error_code ret;
char **files;
uint8_t rnd;
*context = NULL;
/**
* krb5_init_context() will get one random byte to make sure our
* random is alive. Assumption is that once the non blocking
* source allows us to pull bytes, its all seeded and allows us to
* pull more bytes.
*
* Most Kerberos users calls krb5_init_context(), so this is
* useful point where we can do the checking.
*/
ret = krb5_generate_random(&rnd, sizeof(rnd));
if (ret)
return ret;
p = calloc(1, sizeof(*p));
if(!p)
return ENOMEM;
if ((p->hcontext = heim_context_init()) == NULL) {
ret = ENOMEM;
goto out;
}
if (!issuid())
p->flags |= KRB5_CTX_F_HOMEDIR_ACCESS;
ret = krb5_get_default_config_files(&files);
if(ret)
goto out;
ret = krb5_set_config_files(p, files);
krb5_free_config_files(files);
if(ret)
goto out;
/* done enough to load plugins */
heim_base_once_f(&init_context, p, init_context_once);
/* init error tables */
_krb5_init_ets(p);
cc_ops_register(p);
kt_ops_register(p);
#ifdef PKINIT
ret = hx509_context_init(&p->hx509ctx);
if (ret)
goto out;
#endif
if (rk_SOCK_INIT())
p->flags |= KRB5_CTX_F_SOCKETS_INITIALIZED;
out:
if (ret) {
krb5_free_context(p);
p = NULL;
} else {
heim_context_set_log_utc(p->hcontext, p->log_utc);
}
*context = p;
return ret;
}
#ifndef HEIMDAL_SMALLER
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_permitted_enctypes(krb5_context context,
krb5_enctype **etypes)
{
return krb5_get_default_in_tkt_etypes(context, KRB5_PDU_NONE, etypes);
}
/*
*
*/
static krb5_error_code
copy_etypes (krb5_context context,
krb5_enctype *enctypes,
krb5_enctype **ret_enctypes)
{
unsigned int i;
for (i = 0; enctypes[i]; i++)
;
i++;
*ret_enctypes = malloc(sizeof(enctypes[0]) * i);
if (*ret_enctypes == NULL)
return krb5_enomem(context);
memcpy(*ret_enctypes, enctypes, sizeof(enctypes[0]) * i);
return 0;
}
/**
* Make a copy for the Kerberos 5 context, the new krb5_context shoud
* be freed with krb5_free_context().
*
* @param context the Kerberos context to copy
* @param out the copy of the Kerberos, set to NULL error.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_copy_context(krb5_context context, krb5_context *out)
{
krb5_error_code ret;
krb5_context p;
*out = NULL;
p = calloc(1, sizeof(*p));
if (p == NULL)
return krb5_enomem(context);
if ((p->hcontext = heim_context_init()) == NULL) {
ret = ENOMEM;
goto out;
}
heim_context_set_log_utc(p->hcontext, context->log_utc);
if (context->default_cc_name &&
(p->default_cc_name = strdup(context->default_cc_name)) == NULL) {
ret = ENOMEM;
goto out;
}
if (context->default_cc_name_env &&
(p->default_cc_name_env =
strdup(context->default_cc_name_env)) == NULL) {
ret = ENOMEM;
goto out;
}
if (context->configured_default_cc_name &&
(p->configured_default_cc_name =
strdup(context->configured_default_cc_name)) == NULL) {
ret = ENOMEM;
goto out;
}
if (context->etypes) {
ret = copy_etypes(context, context->etypes, &p->etypes);
if (ret)
goto out;
}
if (context->cfg_etypes) {
ret = copy_etypes(context, context->cfg_etypes, &p->cfg_etypes);
if (ret)
goto out;
}
if (context->etypes_des) {
ret = copy_etypes(context, context->etypes_des, &p->etypes_des);
if (ret)
goto out;
}
if (context->default_realms) {
ret = krb5_copy_host_realm(context,
context->default_realms, &p->default_realms);
if (ret)
goto out;
}
ret = _krb5_config_copy(context, context->cf, &p->cf);
if (ret)
goto out;
/* XXX should copy */
_krb5_init_ets(p);
cc_ops_copy(p, context);
kt_ops_copy(p, context);
ret = krb5_set_extra_addresses(p, context->extra_addresses);
if (ret)
goto out;
ret = krb5_set_extra_addresses(p, context->ignore_addresses);
if (ret)
goto out;
ret = _krb5_copy_send_to_kdc_func(p, context);
if (ret)
goto out;
*out = p;
return 0;
out:
krb5_free_context(p);
return ret;
}
#endif
/**
* Frees the krb5_context allocated by krb5_init_context().
*
* @param context context to be freed.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_free_context(krb5_context context)
{
_krb5_free_name_canon_rules(context, context->name_canon_rules);
if (context->default_cc_name)
free(context->default_cc_name);
if (context->default_cc_name_env)
free(context->default_cc_name_env);
if (context->configured_default_cc_name)
free(context->configured_default_cc_name);
free(context->etypes);
free(context->cfg_etypes);
free(context->etypes_des);
free(context->permitted_enctypes);
free(context->tgs_etypes);
free(context->as_etypes);
krb5_free_host_realm (context, context->default_realms);
krb5_config_file_free (context, context->cf);
free(rk_UNCONST(context->cc_ops));
free(context->kt_types);
krb5_clear_error_message(context);
krb5_set_extra_addresses(context, NULL);
krb5_set_ignore_addresses(context, NULL);
krb5_set_send_to_kdc_func(context, NULL, NULL);
#ifdef PKINIT
hx509_context_free(&context->hx509ctx);
#endif
if (context->flags & KRB5_CTX_F_SOCKETS_INITIALIZED) {
rk_SOCK_EXIT();
}
heim_context_free(&context->hcontext);
memset(context, 0, sizeof(*context));
free(context);
}
/**
* Reinit the context from a new set of filenames.
*
* @param context context to add configuration too.
* @param filenames array of filenames, end of list is indicated with a NULL filename.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_config_files(krb5_context context, char **filenames)
{
krb5_error_code ret;
heim_config_binding *tmp = NULL;
if ((ret = heim_set_config_files(context->hcontext, filenames,
&tmp)))
return ret;
krb5_config_file_free(context, context->cf);
context->cf = (krb5_config_binding *)tmp;
return init_context_from_config_file(context);
}
#ifndef HEIMDAL_SMALLER
/**
* Reinit the context from configuration file contents in a C string.
* This should only be used in tests.
*
* @param context context to add configuration too.
* @param config configuration.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_config(krb5_context context, const char *config)
{
krb5_error_code ret;
krb5_config_binding *tmp = NULL;
if ((ret = krb5_config_parse_string_multi(context, config, &tmp)))
return ret;
#if 0
/* with this enabled and if there are no config files, Kerberos is
considererd disabled */
if (tmp == NULL)
return ENXIO;
#endif
krb5_config_file_free(context, context->cf);
context->cf = tmp;
ret = init_context_from_config_file(context);
return ret;
}
#endif
/*
* `pq' isn't free, it's up the the caller
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_prepend_config_files(const char *filelist, char **pq, char ***ret_pp)
{
return heim_prepend_config_files(filelist, pq, ret_pp);
}
/**
* Prepend the filename to the global configuration list.
*
* @param filelist a filename to add to the default list of filename
* @param pfilenames return array of filenames, should be freed with krb5_free_config_files().
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_prepend_config_files_default(const char *filelist, char ***pfilenames)
{
return heim_prepend_config_files_default(filelist, krb5_config_file,
"KRB5_CONFIG", pfilenames);
}
/**
* Get the global configuration list.
*
* @param pfilenames return array of filenames, should be freed with krb5_free_config_files().
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_default_config_files(char ***pfilenames)
{
if (pfilenames == NULL)
return EINVAL;
return heim_get_default_config_files(krb5_config_file, "KRB5_CONFIG",
pfilenames);
}
/**
* Free a list of configuration files.
*
* @param filenames list, terminated with a NULL pointer, to be
* freed. NULL is an valid argument.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_free_config_files(char **filenames)
{
heim_free_config_files(filenames);
}
/**
* Returns the list of Kerberos encryption types sorted in order of
* most preferred to least preferred encryption type. Note that some
* encryption types might be disabled, so you need to check with
* krb5_enctype_valid() before using the encryption type.
*
* @return list of enctypes, terminated with ETYPE_NULL. Its a static
* array completed into the Kerberos library so the content doesn't
* need to be freed.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION const krb5_enctype * KRB5_LIB_CALL
krb5_kerberos_enctypes(krb5_context context)
{
static const krb5_enctype p[] = {
ETYPE_AES256_CTS_HMAC_SHA1_96,
ETYPE_AES128_CTS_HMAC_SHA1_96,
ETYPE_AES256_CTS_HMAC_SHA384_192,
ETYPE_AES128_CTS_HMAC_SHA256_128,
ETYPE_DES3_CBC_SHA1,
ETYPE_ARCFOUR_HMAC_MD5,
ETYPE_NULL
};
static const krb5_enctype weak[] = {
ETYPE_AES256_CTS_HMAC_SHA1_96,
ETYPE_AES128_CTS_HMAC_SHA1_96,
ETYPE_AES256_CTS_HMAC_SHA384_192,
ETYPE_AES128_CTS_HMAC_SHA256_128,
ETYPE_DES3_CBC_SHA1,
ETYPE_DES3_CBC_MD5,
ETYPE_ARCFOUR_HMAC_MD5,
ETYPE_DES_CBC_MD5,
ETYPE_DES_CBC_MD4,
ETYPE_DES_CBC_CRC,
ETYPE_NULL
};
/*
* if the list of enctypes enabled by "allow_weak_crypto"
* are valid, then return the former default enctype list
* that contained the weak entries.
*/
if (krb5_enctype_valid(context, ETYPE_DES_CBC_CRC) == 0 &&
krb5_enctype_valid(context, ETYPE_DES_CBC_MD4) == 0 &&
krb5_enctype_valid(context, ETYPE_DES_CBC_MD5) == 0 &&
krb5_enctype_valid(context, ETYPE_DES_CBC_NONE) == 0 &&
krb5_enctype_valid(context, ETYPE_DES_CFB64_NONE) == 0 &&
krb5_enctype_valid(context, ETYPE_DES_PCBC_NONE) == 0)
return weak;
return p;
}
/*
*
*/
static krb5_error_code
copy_enctypes(krb5_context context,
const krb5_enctype *in,
krb5_enctype **out)
{
krb5_enctype *p = NULL;
size_t m, n;
for (n = 0; in[n]; n++)
;
n++;
ALLOC(p, n);
if(p == NULL)
return krb5_enomem(context);
for (n = 0, m = 0; in[n]; n++) {
if (krb5_enctype_valid(context, in[n]) != 0)
continue;
p[m++] = in[n];
}
p[m] = KRB5_ENCTYPE_NULL;
if (m == 0) {
free(p);
krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
N_("no valid enctype set", ""));
return KRB5_PROG_ETYPE_NOSUPP;
}
*out = p;
return 0;
}
/*
* set `etype' to a malloced list of the default enctypes
*/
static krb5_error_code
default_etypes(krb5_context context, krb5_enctype **etype)
{
const krb5_enctype *p = krb5_kerberos_enctypes(context);
return copy_enctypes(context, p, etype);
}
/**
* Set the default encryption types that will be use in communcation
* with the KDC, clients and servers.
*
* @param context Kerberos 5 context.
* @param etypes Encryption types, array terminated with ETYPE_NULL (0).
* A value of NULL resets the encryption types to the defaults set in the
* configuration file.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_default_in_tkt_etypes(krb5_context context,
const krb5_enctype *etypes)
{
krb5_error_code ret;
krb5_enctype *p = NULL;
if(!etypes) {
etypes = context->cfg_etypes;
}
if(etypes) {
ret = copy_enctypes(context, etypes, &p);
if (ret)
return ret;
}
if(context->etypes)
free(context->etypes);
context->etypes = p;
return 0;
}
/**
* Get the default encryption types that will be use in communcation
* with the KDC, clients and servers.
*
* @param context Kerberos 5 context.
* @param pdu_type request type (AS, TGS or none)
* @param etypes Encryption types, array terminated with
* ETYPE_NULL(0), caller should free array with krb5_xfree():
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_default_in_tkt_etypes(krb5_context context,
krb5_pdu pdu_type,
krb5_enctype **etypes)
{
krb5_enctype *enctypes = NULL;
krb5_error_code ret;
krb5_enctype *p;
heim_assert(pdu_type == KRB5_PDU_AS_REQUEST ||
pdu_type == KRB5_PDU_TGS_REQUEST ||
pdu_type == KRB5_PDU_NONE, "unexpected pdu type");
if (pdu_type == KRB5_PDU_AS_REQUEST && context->as_etypes != NULL)
enctypes = context->as_etypes;
else if (pdu_type == KRB5_PDU_TGS_REQUEST && context->tgs_etypes != NULL)
enctypes = context->tgs_etypes;
else if (context->etypes != NULL)
enctypes = context->etypes;
if (enctypes != NULL) {
ret = copy_enctypes(context, enctypes, &p);
if (ret)
return ret;
} else {
ret = default_etypes(context, &p);
if (ret)
return ret;
}
*etypes = p;
return 0;
}
/**
* Init the built-in ets in the Kerberos library.
*
* @param context kerberos context to add the ets too
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_init_ets(krb5_context context)
{
}
static void
_krb5_init_ets(krb5_context context)
{
heim_add_et_list(context->hcontext, initialize_krb5_error_table_r);
heim_add_et_list(context->hcontext, initialize_asn1_error_table_r);
heim_add_et_list(context->hcontext, initialize_heim_error_table_r);
heim_add_et_list(context->hcontext, initialize_k524_error_table_r);
heim_add_et_list(context->hcontext, initialize_k5e1_error_table_r);
#ifdef COM_ERR_BINDDOMAIN_krb5
bindtextdomain(COM_ERR_BINDDOMAIN_krb5, HEIMDAL_LOCALEDIR);
bindtextdomain(COM_ERR_BINDDOMAIN_asn1, HEIMDAL_LOCALEDIR);
bindtextdomain(COM_ERR_BINDDOMAIN_heim, HEIMDAL_LOCALEDIR);
bindtextdomain(COM_ERR_BINDDOMAIN_k524, HEIMDAL_LOCALEDIR);
#endif
#ifdef PKINIT
heim_add_et_list(context->hcontext, initialize_hx_error_table_r);
#ifdef COM_ERR_BINDDOMAIN_hx
bindtextdomain(COM_ERR_BINDDOMAIN_hx, HEIMDAL_LOCALEDIR);
#endif
#endif
}
/**
* Make the kerberos library default to the admin KDC.
*
* @param context Kerberos 5 context.
* @param flag boolean flag to select if the use the admin KDC or not.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_set_use_admin_kdc (krb5_context context, krb5_boolean flag)
{
context->use_admin_kdc = flag;
}
/**
* Make the kerberos library default to the admin KDC.
*
* @param context Kerberos 5 context.
*
* @return boolean flag to telling the context will use admin KDC as the default KDC.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_get_use_admin_kdc (krb5_context context)
{
return context->use_admin_kdc;
}
/**
* Add extra address to the address list that the library will add to
* the client's address list when communicating with the KDC.
*
* @param context Kerberos 5 context.
* @param addresses addreses to add
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_add_extra_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->extra_addresses)
return krb5_append_addresses(context,
context->extra_addresses, addresses);
else
return krb5_set_extra_addresses(context, addresses);
}
/**
* Set extra address to the address list that the library will add to
* the client's address list when communicating with the KDC.
*
* @param context Kerberos 5 context.
* @param addresses addreses to set
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_extra_addresses(krb5_context context, const krb5_addresses *addresses)
{
if(context->extra_addresses)
krb5_free_addresses(context, context->extra_addresses);
if(addresses == NULL) {
if(context->extra_addresses != NULL) {
free(context->extra_addresses);
context->extra_addresses = NULL;
}
return 0;
}
if(context->extra_addresses == NULL) {
context->extra_addresses = malloc(sizeof(*context->extra_addresses));
if (context->extra_addresses == NULL)
return krb5_enomem(context);
}
return krb5_copy_addresses(context, addresses, context->extra_addresses);
}
/**
* Get extra address to the address list that the library will add to
* the client's address list when communicating with the KDC.
*
* @param context Kerberos 5 context.
* @param addresses addreses to set
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_extra_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->extra_addresses == NULL) {
memset(addresses, 0, sizeof(*addresses));
return 0;
}
return krb5_copy_addresses(context,context->extra_addresses, addresses);
}
/**
* Add extra addresses to ignore when fetching addresses from the
* underlaying operating system.
*
* @param context Kerberos 5 context.
* @param addresses addreses to ignore
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_add_ignore_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->ignore_addresses)
return krb5_append_addresses(context,
context->ignore_addresses, addresses);
else
return krb5_set_ignore_addresses(context, addresses);
}
/**
* Set extra addresses to ignore when fetching addresses from the
* underlaying operating system.
*
* @param context Kerberos 5 context.
* @param addresses addreses to ignore
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses)
{
if(context->ignore_addresses)
krb5_free_addresses(context, context->ignore_addresses);
if(addresses == NULL) {
if(context->ignore_addresses != NULL) {
free(context->ignore_addresses);
context->ignore_addresses = NULL;
}
return 0;
}
if(context->ignore_addresses == NULL) {
context->ignore_addresses = malloc(sizeof(*context->ignore_addresses));
if (context->ignore_addresses == NULL)
return krb5_enomem(context);
}
return krb5_copy_addresses(context, addresses, context->ignore_addresses);
}
/**
* Get extra addresses to ignore when fetching addresses from the
* underlaying operating system.
*
* @param context Kerberos 5 context.
* @param addresses list addreses ignored
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_ignore_addresses(krb5_context context, krb5_addresses *addresses)
{
if(context->ignore_addresses == NULL) {
memset(addresses, 0, sizeof(*addresses));
return 0;
}
return krb5_copy_addresses(context, context->ignore_addresses, addresses);
}
/**
* Set version of fcache that the library should use.
*
* @param context Kerberos 5 context.
* @param version version number.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_fcache_version(krb5_context context, int version)
{
context->fcache_vno = version;
return 0;
}
/**
* Get version of fcache that the library should use.
*
* @param context Kerberos 5 context.
* @param version version number.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_fcache_version(krb5_context context, int *version)
{
*version = context->fcache_vno;
return 0;
}
/**
* Runtime check if the Kerberos library was complied with thread support.
*
* @return TRUE if the library was compiled with thread support, FALSE if not.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_is_thread_safe(void)
{
#ifdef ENABLE_PTHREAD_SUPPORT
return TRUE;
#else
return FALSE;
#endif
}
/**
* Set if the library should use DNS to canonicalize hostnames.
*
* @param context Kerberos 5 context.
* @param flag if its dns canonicalizion is used or not.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_set_dns_canonicalize_hostname (krb5_context context, krb5_boolean flag)
{
if (flag)
context->flags |= KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME;
else
context->flags &= ~KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME;
}
/**
* Get if the library uses DNS to canonicalize hostnames.
*
* @param context Kerberos 5 context.
*
* @return return non zero if the library uses DNS to canonicalize hostnames.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_get_dns_canonicalize_hostname (krb5_context context)
{
return (context->flags & KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME) ? 1 : 0;
}
/**
* Get current offset in time to the KDC.
*
* @param context Kerberos 5 context.
* @param sec seconds part of offset.
* @param usec micro seconds part of offset.
*
* @return returns zero
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_kdc_sec_offset (krb5_context context, int32_t *sec, int32_t *usec)
{
if (sec)
*sec = context->kdc_sec_offset;
if (usec)
*usec = context->kdc_usec_offset;
return 0;
}
/**
* Set current offset in time to the KDC.
*
* @param context Kerberos 5 context.
* @param sec seconds part of offset.
* @param usec micro seconds part of offset.
*
* @return returns zero
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_kdc_sec_offset (krb5_context context, int32_t sec, int32_t usec)
{
context->kdc_sec_offset = sec;
if (usec >= 0)
context->kdc_usec_offset = usec;
return 0;
}
/**
* Get max time skew allowed.
*
* @param context Kerberos 5 context.
*
* @return timeskew in seconds.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION time_t KRB5_LIB_CALL
krb5_get_max_time_skew (krb5_context context)
{
return context->max_skew;
}
/**
* Set max time skew allowed.
*
* @param context Kerberos 5 context.
* @param t timeskew in seconds.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
krb5_set_max_time_skew (krb5_context context, time_t t)
{
context->max_skew = t;
}
/*
* Init encryption types in len, val with etypes.
*
* @param context Kerberos 5 context.
* @param pdu_type type of pdu
* @param len output length of val.
* @param val output array of enctypes.
* @param etypes etypes to set val and len to, if NULL, use default enctypes.
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
_krb5_init_etype(krb5_context context,
krb5_pdu pdu_type,
unsigned *len,
krb5_enctype **val,
const krb5_enctype *etypes)
{
krb5_error_code ret;
if (etypes == NULL)
ret = krb5_get_default_in_tkt_etypes(context, pdu_type, val);
else
ret = copy_enctypes(context, etypes, val);
if (ret)
return ret;
if (len) {
*len = 0;
while ((*val)[*len] != KRB5_ENCTYPE_NULL)
(*len)++;
}
return 0;
}
/*
* Allow homedir access
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
_krb5_homedir_access(krb5_context context)
{
if (context)
return !!(context->flags & KRB5_CTX_F_HOMEDIR_ACCESS);
return !issuid();
}
/**
* Enable and disable home directory access on either the global state
* or the krb5_context state. By calling krb5_set_home_dir_access()
* with context set to NULL, the global state is configured otherwise
* the state for the krb5_context is modified.
*
* For home directory access to be allowed, both the global state and
* the krb5_context state have to be allowed.
*
* @param context a Kerberos 5 context or NULL
* @param allow allow if TRUE home directory
* @return the old value
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_set_home_dir_access(krb5_context context, krb5_boolean allow)
{
krb5_boolean old = _krb5_homedir_access(context);
if (context) {
if (allow)
context->flags |= KRB5_CTX_F_HOMEDIR_ACCESS;
else
context->flags &= ~KRB5_CTX_F_HOMEDIR_ACCESS;
heim_context_set_homedir_access(context->hcontext, allow ? 1 : 0);
}
return old;
}
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