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-rw-r--r--crypto/heimdal/lib/hdb/ext.c418
1 files changed, 418 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/hdb/ext.c b/crypto/heimdal/lib/hdb/ext.c
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+/*
+ * Copyright (c) 2004 - 2005 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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.
+ */
+
+#include "hdb_locl.h"
+#include <der.h>
+
+RCSID("$Id: ext.c 21113 2007-06-18 12:59:32Z lha $");
+
+krb5_error_code
+hdb_entry_check_mandatory(krb5_context context, const hdb_entry *ent)
+{
+ int i;
+
+ if (ent->extensions == NULL)
+ return 0;
+
+ /*
+ * check for unknown extensions and if they where tagged mandatory
+ */
+
+ for (i = 0; i < ent->extensions->len; i++) {
+ if (ent->extensions->val[i].data.element !=
+ choice_HDB_extension_data_asn1_ellipsis)
+ continue;
+ if (ent->extensions->val[i].mandatory) {
+ krb5_set_error_string(context, "Principal have unknown "
+ "mandatory extension");
+ return HDB_ERR_MANDATORY_OPTION;
+ }
+ }
+ return 0;
+}
+
+HDB_extension *
+hdb_find_extension(const hdb_entry *entry, int type)
+{
+ int i;
+
+ if (entry->extensions == NULL)
+ return NULL;
+
+ for (i = 0; i < entry->extensions->len; i++)
+ if (entry->extensions->val[i].data.element == type)
+ return &entry->extensions->val[i];
+ return NULL;
+}
+
+/*
+ * Replace the extension `ext' in `entry'. Make a copy of the
+ * extension, so the caller must still free `ext' on both success and
+ * failure. Returns 0 or error code.
+ */
+
+krb5_error_code
+hdb_replace_extension(krb5_context context,
+ hdb_entry *entry,
+ const HDB_extension *ext)
+{
+ HDB_extension *ext2;
+ HDB_extension *es;
+ int ret;
+
+ ext2 = NULL;
+
+ if (entry->extensions == NULL) {
+ entry->extensions = calloc(1, sizeof(*entry->extensions));
+ if (entry->extensions == NULL) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ } else if (ext->data.element != choice_HDB_extension_data_asn1_ellipsis) {
+ ext2 = hdb_find_extension(entry, ext->data.element);
+ } else {
+ /*
+ * This is an unknown extention, and we are asked to replace a
+ * possible entry in `entry' that is of the same type. This
+ * might seem impossible, but ASN.1 CHOICE comes to our
+ * rescue. The first tag in each branch in the CHOICE is
+ * unique, so just find the element in the list that have the
+ * same tag was we are putting into the list.
+ */
+ Der_class replace_class, list_class;
+ Der_type replace_type, list_type;
+ unsigned int replace_tag, list_tag;
+ size_t size;
+ int i;
+
+ ret = der_get_tag(ext->data.u.asn1_ellipsis.data,
+ ext->data.u.asn1_ellipsis.length,
+ &replace_class, &replace_type, &replace_tag,
+ &size);
+ if (ret) {
+ krb5_set_error_string(context, "hdb: failed to decode "
+ "replacement hdb extention");
+ return ret;
+ }
+
+ for (i = 0; i < entry->extensions->len; i++) {
+ HDB_extension *ext3 = &entry->extensions->val[i];
+
+ if (ext3->data.element != choice_HDB_extension_data_asn1_ellipsis)
+ continue;
+
+ ret = der_get_tag(ext3->data.u.asn1_ellipsis.data,
+ ext3->data.u.asn1_ellipsis.length,
+ &list_class, &list_type, &list_tag,
+ &size);
+ if (ret) {
+ krb5_set_error_string(context, "hdb: failed to decode "
+ "present hdb extention");
+ return ret;
+ }
+
+ if (MAKE_TAG(replace_class,replace_type,replace_type) ==
+ MAKE_TAG(list_class,list_type,list_type)) {
+ ext2 = ext3;
+ break;
+ }
+ }
+ }
+
+ if (ext2) {
+ free_HDB_extension(ext2);
+ ret = copy_HDB_extension(ext, ext2);
+ if (ret)
+ krb5_set_error_string(context, "hdb: failed to copy replacement "
+ "hdb extention");
+ return ret;
+ }
+
+ es = realloc(entry->extensions->val,
+ (entry->extensions->len+1)*sizeof(entry->extensions->val[0]));
+ if (es == NULL) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ entry->extensions->val = es;
+
+ ret = copy_HDB_extension(ext,
+ &entry->extensions->val[entry->extensions->len]);
+ if (ret == 0)
+ entry->extensions->len++;
+ else
+ krb5_set_error_string(context, "hdb: failed to copy new extension");
+
+ return ret;
+}
+
+krb5_error_code
+hdb_clear_extension(krb5_context context,
+ hdb_entry *entry,
+ int type)
+{
+ int i;
+
+ if (entry->extensions == NULL)
+ return 0;
+
+ for (i = 0; i < entry->extensions->len; i++) {
+ if (entry->extensions->val[i].data.element == type) {
+ free_HDB_extension(&entry->extensions->val[i]);
+ memmove(&entry->extensions->val[i],
+ &entry->extensions->val[i + 1],
+ sizeof(entry->extensions->val[i]) * (entry->extensions->len - i - 1));
+ entry->extensions->len--;
+ }
+ }
+ if (entry->extensions->len == 0) {
+ free(entry->extensions->val);
+ free(entry->extensions);
+ entry->extensions = NULL;
+ }
+
+ return 0;
+}
+
+
+krb5_error_code
+hdb_entry_get_pkinit_acl(const hdb_entry *entry, const HDB_Ext_PKINIT_acl **a)
+{
+ const HDB_extension *ext;
+
+ ext = hdb_find_extension(entry, choice_HDB_extension_data_pkinit_acl);
+ if (ext)
+ *a = &ext->data.u.pkinit_acl;
+ else
+ *a = NULL;
+
+ return 0;
+}
+
+krb5_error_code
+hdb_entry_get_pkinit_hash(const hdb_entry *entry, const HDB_Ext_PKINIT_hash **a)
+{
+ const HDB_extension *ext;
+
+ ext = hdb_find_extension(entry, choice_HDB_extension_data_pkinit_cert_hash);
+ if (ext)
+ *a = &ext->data.u.pkinit_cert_hash;
+ else
+ *a = NULL;
+
+ return 0;
+}
+
+krb5_error_code
+hdb_entry_get_pw_change_time(const hdb_entry *entry, time_t *t)
+{
+ const HDB_extension *ext;
+
+ ext = hdb_find_extension(entry, choice_HDB_extension_data_last_pw_change);
+ if (ext)
+ *t = ext->data.u.last_pw_change;
+ else
+ *t = 0;
+
+ return 0;
+}
+
+krb5_error_code
+hdb_entry_set_pw_change_time(krb5_context context,
+ hdb_entry *entry,
+ time_t t)
+{
+ HDB_extension ext;
+
+ ext.mandatory = FALSE;
+ ext.data.element = choice_HDB_extension_data_last_pw_change;
+ if (t == 0)
+ t = time(NULL);
+ ext.data.u.last_pw_change = t;
+
+ return hdb_replace_extension(context, entry, &ext);
+}
+
+int
+hdb_entry_get_password(krb5_context context, HDB *db,
+ const hdb_entry *entry, char **p)
+{
+ HDB_extension *ext;
+ char *str;
+ int ret;
+
+ ext = hdb_find_extension(entry, choice_HDB_extension_data_password);
+ if (ext) {
+ heim_utf8_string str;
+ heim_octet_string pw;
+
+ if (db->hdb_master_key_set && ext->data.u.password.mkvno) {
+ hdb_master_key key;
+
+ key = _hdb_find_master_key(ext->data.u.password.mkvno,
+ db->hdb_master_key);
+
+ if (key == NULL) {
+ krb5_set_error_string(context, "master key %d missing",
+ *ext->data.u.password.mkvno);
+ return HDB_ERR_NO_MKEY;
+ }
+
+ ret = _hdb_mkey_decrypt(context, key, HDB_KU_MKEY,
+ ext->data.u.password.password.data,
+ ext->data.u.password.password.length,
+ &pw);
+ } else {
+ ret = der_copy_octet_string(&ext->data.u.password.password, &pw);
+ }
+ if (ret) {
+ krb5_clear_error_string(context);
+ return ret;
+ }
+
+ str = pw.data;
+ if (str[pw.length - 1] != '\0') {
+ krb5_set_error_string(context, "password malformated");
+ return EINVAL;
+ }
+
+ *p = strdup(str);
+
+ der_free_octet_string(&pw);
+ if (*p == NULL) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ return 0;
+ }
+
+ ret = krb5_unparse_name(context, entry->principal, &str);
+ if (ret == 0) {
+ krb5_set_error_string(context, "no password attributefor %s", str);
+ free(str);
+ } else
+ krb5_clear_error_string(context);
+
+ return ENOENT;
+}
+
+int
+hdb_entry_set_password(krb5_context context, HDB *db,
+ hdb_entry *entry, const char *p)
+{
+ HDB_extension ext;
+ hdb_master_key key;
+ int ret;
+
+ ext.mandatory = FALSE;
+ ext.data.element = choice_HDB_extension_data_password;
+
+ if (db->hdb_master_key_set) {
+
+ key = _hdb_find_master_key(NULL, db->hdb_master_key);
+ if (key == NULL) {
+ krb5_set_error_string(context, "hdb_entry_set_password: "
+ "failed to find masterkey");
+ return HDB_ERR_NO_MKEY;
+ }
+
+ ret = _hdb_mkey_encrypt(context, key, HDB_KU_MKEY,
+ p, strlen(p) + 1,
+ &ext.data.u.password.password);
+ if (ret)
+ return ret;
+
+ ext.data.u.password.mkvno =
+ malloc(sizeof(*ext.data.u.password.mkvno));
+ if (ext.data.u.password.mkvno == NULL) {
+ free_HDB_extension(&ext);
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ *ext.data.u.password.mkvno = _hdb_mkey_version(key);
+
+ } else {
+ ext.data.u.password.mkvno = NULL;
+
+ ret = krb5_data_copy(&ext.data.u.password.password,
+ p, strlen(p) + 1);
+ if (ret) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ free_HDB_extension(&ext);
+ return ret;
+ }
+ }
+
+ ret = hdb_replace_extension(context, entry, &ext);
+
+ free_HDB_extension(&ext);
+
+ return ret;
+}
+
+int
+hdb_entry_clear_password(krb5_context context, hdb_entry *entry)
+{
+ return hdb_clear_extension(context, entry,
+ choice_HDB_extension_data_password);
+}
+
+krb5_error_code
+hdb_entry_get_ConstrainedDelegACL(const hdb_entry *entry,
+ const HDB_Ext_Constrained_delegation_acl **a)
+{
+ const HDB_extension *ext;
+
+ ext = hdb_find_extension(entry,
+ choice_HDB_extension_data_allowed_to_delegate_to);
+ if (ext)
+ *a = &ext->data.u.allowed_to_delegate_to;
+ else
+ *a = NULL;
+
+ return 0;
+}
+
+krb5_error_code
+hdb_entry_get_aliases(const hdb_entry *entry, const HDB_Ext_Aliases **a)
+{
+ const HDB_extension *ext;
+
+ ext = hdb_find_extension(entry, choice_HDB_extension_data_aliases);
+ if (ext)
+ *a = &ext->data.u.aliases;
+ else
+ *a = NULL;
+
+ return 0;
+}
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