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-rw-r--r--source4/auth/kerberos/config.mk3
-rw-r--r--source4/auth/kerberos/keytab_copy.c146
2 files changed, 148 insertions, 1 deletions
diff --git a/source4/auth/kerberos/config.mk b/source4/auth/kerberos/config.mk
index 822bf398a7..609b036b64 100644
--- a/source4/auth/kerberos/config.mk
+++ b/source4/auth/kerberos/config.mk
@@ -12,7 +12,8 @@ KERBEROS_OBJ_FILES = $(addprefix $(authsrcdir)/kerberos/, \
kerberos_heimdal.o \
kerberos_pac.o \
gssapi_parse.o \
- krb5_init_context.o)
+ krb5_init_context.o \
+ keytab_copy.o)
$(eval $(call proto_header_template,$(authsrcdir)/kerberos/proto.h,$(KERBEROS_OBJ_FILES:.o=.c)))
diff --git a/source4/auth/kerberos/keytab_copy.c b/source4/auth/kerberos/keytab_copy.c
new file mode 100644
index 0000000000..ba4ea2bf39
--- /dev/null
+++ b/source4/auth/kerberos/keytab_copy.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 1997-2004 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 "includes.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+
+static const krb5_boolean verbose_flag = FALSE;
+
+static krb5_boolean
+compare_keyblock(const krb5_keyblock *a, const krb5_keyblock *b)
+{
+ if(a->keytype != b->keytype ||
+ a->keyvalue.length != b->keyvalue.length ||
+ memcmp(a->keyvalue.data, b->keyvalue.data, a->keyvalue.length) != 0)
+ return FALSE;
+ return TRUE;
+}
+
+krb5_error_code kt_copy (krb5_context context, const char *from, const char *to)
+{
+ krb5_error_code ret;
+ krb5_keytab src_keytab, dst_keytab;
+ krb5_kt_cursor cursor;
+ krb5_keytab_entry entry, dummy;
+
+ ret = krb5_kt_resolve (context, from, &src_keytab);
+ if (ret) {
+ krb5_warn (context, ret, "resolving src keytab `%s'", from);
+ return 1;
+ }
+
+ ret = krb5_kt_resolve (context, to, &dst_keytab);
+ if (ret) {
+ krb5_kt_close (context, src_keytab);
+ krb5_warn (context, ret, "resolving dst keytab `%s'", to);
+ return 1;
+ }
+
+ ret = krb5_kt_start_seq_get (context, src_keytab, &cursor);
+ if (ret) {
+ krb5_warn (context, ret, "krb5_kt_start_seq_get %s", from);
+ goto out;
+ }
+
+ if (verbose_flag)
+ fprintf(stderr, "copying %s to %s\n", from, to);
+
+ while((ret = krb5_kt_next_entry(context, src_keytab,
+ &entry, &cursor)) == 0) {
+ char *name_str;
+ char *etype_str;
+ ret = krb5_unparse_name (context, entry.principal, &name_str);
+ if(ret) {
+ krb5_warn(context, ret, "krb5_unparse_name");
+ name_str = NULL; /* XXX */
+ }
+ ret = krb5_enctype_to_string(context, entry.keyblock.keytype, &etype_str);
+ if(ret) {
+ krb5_warn(context, ret, "krb5_enctype_to_string");
+ etype_str = NULL; /* XXX */
+ }
+ ret = krb5_kt_get_entry(context, dst_keytab,
+ entry.principal,
+ entry.vno,
+ entry.keyblock.keytype,
+ &dummy);
+ if(ret == 0) {
+ /* this entry is already in the new keytab, so no need to
+ copy it; if the keyblocks are not the same, something
+ is weird, so complain about that */
+ if(!compare_keyblock(&entry.keyblock, &dummy.keyblock)) {
+ krb5_warnx(context, "entry with different keyvalue "
+ "already exists for %s, keytype %s, kvno %d",
+ name_str, etype_str, entry.vno);
+ }
+ krb5_kt_free_entry(context, &dummy);
+ krb5_kt_free_entry (context, &entry);
+ free(name_str);
+ free(etype_str);
+ continue;
+ } else if(ret != KRB5_KT_NOTFOUND) {
+ krb5_warn (context, ret, "%s: fetching %s/%s/%u",
+ to, name_str, etype_str, entry.vno);
+ krb5_kt_free_entry (context, &entry);
+ free(name_str);
+ free(etype_str);
+ break;
+ }
+ if (verbose_flag)
+ fprintf (stderr, "copying %s, keytype %s, kvno %d\n", name_str,
+ etype_str, entry.vno);
+ ret = krb5_kt_add_entry (context, dst_keytab, &entry);
+ krb5_kt_free_entry (context, &entry);
+ if (ret) {
+ krb5_warn (context, ret, "%s: adding %s/%s/%u",
+ to, name_str, etype_str, entry.vno);
+ free(name_str);
+ free(etype_str);
+ break;
+ }
+ free(name_str);
+ free(etype_str);
+ }
+ krb5_kt_end_seq_get (context, src_keytab, &cursor);
+
+ out:
+ krb5_kt_close (context, src_keytab);
+ krb5_kt_close (context, dst_keytab);
+ if (ret == KRB5_KT_END) {
+ return 0;
+ } else if (ret == 0) {
+ return EINVAL;
+ }
+ return ret;
+}