Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1473 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/krb5/context.c b/third_party/heimdal/lib/krb5/context.c
new file mode 100644
index 0000000..4040a98
--- /dev/null
+++ b/third_party/heimdal/lib/krb5/context.c
@@ -0,0 +1,1473 @@
+/*
+ * 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;
+
+    free(context->default_cc_name);
+    context->default_cc_name = NULL;
+    context->default_cc_name_set = 0;
+    free(context->configured_default_cc_name);
+    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);
+    free(context->default_cc_name);
+    free(context->default_cc_name_env);
+    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;
+}
+