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-rw-r--r--crypto/heimdal/lib/krb5/keytab_krb4.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/keytab_krb4.c b/crypto/heimdal/lib/krb5/keytab_krb4.c
new file mode 100644
index 0000000..b1f425c
--- /dev/null
+++ b/crypto/heimdal/lib/krb5/keytab_krb4.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 1997, 1998, 1999 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 "krb5_locl.h"
+#include <krb.h>
+
+RCSID("$Id: keytab_krb4.c,v 1.5 2000/01/06 08:04:58 assar Exp $");
+
+struct krb4_kt_data {
+ char *filename;
+};
+
+static krb5_error_code
+krb4_kt_resolve(krb5_context context, const char *name, krb5_keytab id)
+{
+ struct krb4_kt_data *d;
+
+ d = malloc (sizeof(*d));
+ if (d == NULL)
+ return ENOMEM;
+ d->filename = strdup (name);
+ if (d->filename == NULL) {
+ free(d);
+ return ENOMEM;
+ }
+ id->data = d;
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_get_name (krb5_context context,
+ krb5_keytab id,
+ char *name,
+ size_t name_sz)
+{
+ struct krb4_kt_data *d = id->data;
+
+ strlcpy (name, d->filename, name_sz);
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_close (krb5_context context,
+ krb5_keytab id)
+{
+ struct krb4_kt_data *d = id->data;
+
+ free (d->filename);
+ free (d);
+ return 0;
+}
+
+struct krb4_cursor_extra_data {
+ krb5_keytab_entry entry;
+ int num;
+};
+
+static krb5_error_code
+krb4_kt_start_seq_get_int (krb5_context context,
+ krb5_keytab id,
+ int flags,
+ krb5_kt_cursor *c)
+{
+ struct krb4_kt_data *d = id->data;
+ struct krb4_cursor_extra_data *ed;
+
+ ed = malloc (sizeof(*ed));
+ if (ed == NULL)
+ return ENOMEM;
+ ed->entry.principal = NULL;
+ ed->num = -1;
+ c->data = ed;
+ c->fd = open (d->filename, flags);
+ if (c->fd < 0) {
+ free (ed);
+ return errno;
+ }
+ c->sp = krb5_storage_from_fd(c->fd);
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_start_seq_get (krb5_context context,
+ krb5_keytab id,
+ krb5_kt_cursor *c)
+{
+ return krb4_kt_start_seq_get_int (context, id, O_BINARY | O_RDONLY, c);
+}
+
+static krb5_error_code
+read_v4_entry (krb5_context context,
+ struct krb4_kt_data *d,
+ krb5_kt_cursor *c,
+ struct krb4_cursor_extra_data *ed)
+{
+ krb5_error_code ret;
+ char *service, *instance, *realm;
+ int8_t kvno;
+ des_cblock key;
+
+ ret = krb5_ret_stringz(c->sp, &service);
+ if (ret)
+ return ret;
+ ret = krb5_ret_stringz(c->sp, &instance);
+ if (ret) {
+ free (service);
+ return ret;
+ }
+ ret = krb5_ret_stringz(c->sp, &realm);
+ if (ret) {
+ free (service);
+ free (instance);
+ return ret;
+ }
+ ret = krb5_425_conv_principal (context, service, instance, realm,
+ &ed->entry.principal);
+ free (service);
+ free (instance);
+ free (realm);
+ if (ret)
+ return ret;
+ ret = krb5_ret_int8(c->sp, &kvno);
+ if (ret) {
+ krb5_free_principal (context, ed->entry.principal);
+ return ret;
+ }
+ ret = c->sp->fetch(c->sp, key, 8);
+ if (ret < 0) {
+ krb5_free_principal(context, ed->entry.principal);
+ return ret;
+ }
+ if (ret < 8) {
+ krb5_free_principal(context, ed->entry.principal);
+ return EINVAL;
+ }
+ ed->entry.vno = kvno;
+ ret = krb5_data_copy (&ed->entry.keyblock.keyvalue,
+ key, 8);
+ if (ret)
+ return ret;
+ ed->entry.timestamp = time(NULL);
+ ed->num = 0;
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_next_entry (krb5_context context,
+ krb5_keytab id,
+ krb5_keytab_entry *entry,
+ krb5_kt_cursor *c)
+{
+ krb5_error_code ret;
+ struct krb4_kt_data *d = id->data;
+ struct krb4_cursor_extra_data *ed = c->data;
+ const krb5_enctype keytypes[] = {ETYPE_DES_CBC_MD5,
+ ETYPE_DES_CBC_MD4,
+ ETYPE_DES_CBC_CRC};
+
+ if (ed->num == -1) {
+ ret = read_v4_entry (context, d, c, ed);
+ if (ret)
+ return ret;
+ }
+ ret = krb5_kt_copy_entry_contents (context,
+ &ed->entry,
+ entry);
+ if (ret)
+ return ret;
+ entry->keyblock.keytype = keytypes[ed->num];
+ if (++ed->num == 3) {
+ krb5_kt_free_entry (context, &ed->entry);
+ ed->num = -1;
+ }
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_end_seq_get (krb5_context context,
+ krb5_keytab id,
+ krb5_kt_cursor *c)
+{
+ struct krb4_cursor_extra_data *ed = c->data;
+
+ krb5_storage_free (c->sp);
+ if (ed->num != -1)
+ krb5_kt_free_entry (context, &ed->entry);
+ free (c->data);
+ close (c->fd);
+ return 0;
+}
+
+static krb5_error_code
+krb4_kt_add_entry (krb5_context context,
+ krb5_keytab id,
+ krb5_keytab_entry *entry)
+{
+ struct krb4_kt_data *d = id->data;
+ krb5_error_code ret;
+ int fd;
+ char service[ANAME_SZ];
+ char instance[INST_SZ];
+ char realm[REALM_SZ];
+ int8_t kvno;
+
+ fd = open (d->filename, O_WRONLY | O_APPEND | O_BINARY);
+ if (fd < 0) {
+ fd = open (d->filename,
+ O_WRONLY | O_APPEND | O_BINARY | O_CREAT, 0600);
+ if (fd < 0)
+ return errno;
+ }
+ ret = krb5_524_conv_principal (context, entry->principal,
+ service, instance, realm);
+ if (ret) {
+ close (fd);
+ return ret;
+ }
+ if (entry->keyblock.keyvalue.length == 8
+ && entry->keyblock.keytype == ETYPE_DES_CBC_MD5) {
+ write(fd, service, strlen(service)+1);
+ write(fd, instance, strlen(instance)+1);
+ write(fd, realm, strlen(realm)+1);
+ kvno = entry->vno;
+ write(fd, &kvno, sizeof(kvno));
+ write(fd, entry->keyblock.keyvalue.data, 8);
+ }
+ close (fd);
+ return 0;
+}
+
+krb5_kt_ops krb4_fkt_ops = {
+ "krb4",
+ krb4_kt_resolve,
+ krb4_kt_get_name,
+ krb4_kt_close,
+ NULL, /* get */
+ krb4_kt_start_seq_get,
+ krb4_kt_next_entry,
+ krb4_kt_end_seq_get,
+ krb4_kt_add_entry, /* add_entry */
+ NULL /* remove_entry */
+};
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