new files

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6921 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/keytab_memory.c

@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H<>gskolan
+ * (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. All advertising materials mentioning features or use of this software 
+ *    must display the following acknowledgement: 
+ *      This product includes software developed by Kungliga Tekniska 
+ *      H<>gskolan and its contributors. 
+ *
+ * 4. 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"
+
+RCSID("$Id$");
+
+/* memory operations -------------------------------------------- */
+
+struct mkt_data {
+    krb5_keytab_entry *entries;
+    int num_entries;
+};
+
+static krb5_error_code
+mkt_resolve(krb5_context context, const char *name, krb5_keytab id)
+{
+    struct mkt_data *d;
+    d = malloc(sizeof(*d));
+    if(d == NULL)
+	return ENOMEM;
+    d->entries = NULL;
+    d->num_entries = 0;
+    id->data = d;
+    return 0;
+}
+
+static krb5_error_code
+mkt_close(krb5_context context, krb5_keytab id)
+{
+    struct mkt_data *d = id->data;
+    int i;
+    for(i = 0; i < d->num_entries; i++)
+	krb5_kt_free_entry(context, &d->entries[i]);
+    free(d->entries);
+    free(d);
+    return 0;
+}
+
+static krb5_error_code 
+mkt_get_name(krb5_context context, 
+	     krb5_keytab id, 
+	     char *name, 
+	     size_t namesize)
+{
+    strncpy(name, "", namesize);
+    return 0;
+}
+
+static krb5_error_code
+mkt_start_seq_get(krb5_context context, 
+		  krb5_keytab id, 
+		  krb5_kt_cursor *c)
+{
+    /* XXX */
+    c->fd = 0;
+    return 0;
+}
+
+static krb5_error_code
+mkt_next_entry(krb5_context context, 
+	       krb5_keytab id, 
+	       krb5_keytab_entry *entry, 
+	       krb5_kt_cursor *c)
+{
+    struct mkt_data *d = id->data;
+    if(c->fd >= d->num_entries)
+	return KRB5_KT_END;
+    return krb5_kt_copy_entry_contents(context, &d->entries[c->fd++], entry);
+}
+
+static krb5_error_code
+mkt_end_seq_get(krb5_context context, 
+		krb5_keytab id,
+		krb5_kt_cursor *cursor)
+{
+    return 0;
+}
+
+static krb5_error_code
+mkt_add_entry(krb5_context context,
+	      krb5_keytab id,
+	      krb5_keytab_entry *entry)
+{
+    struct mkt_data *d = id->data;
+    krb5_keytab_entry *tmp;
+    tmp = realloc(d->entries, (d->num_entries + 1) * sizeof(*d->entries));
+    if(tmp == NULL)
+	return ENOMEM;
+    d->entries = tmp;
+    return krb5_kt_copy_entry_contents(context, entry, 
+				       &d->entries[d->num_entries++]);
+}
+
+static krb5_error_code
+mkt_remove_entry(krb5_context context,
+		 krb5_keytab id,
+		 krb5_keytab_entry *entry)
+{
+    struct mkt_data *d = id->data;
+    krb5_keytab_entry *e, *end;
+    
+    /* do this backwards to minimize copying */
+    for(end = d->entries + d->num_entries, e = end - 1; e >= d->entries; e--) {
+	if(krb5_kt_compare(context, e, entry->principal, 
+			   entry->vno, entry->keyblock.keytype)) {
+	    krb5_kt_free_entry(context, e);
+	    memmove(e, e + 1, (end - e - 1) * sizeof(*e));
+	    memset(end - 1, 0, sizeof(*end));
+	    d->num_entries--;
+	    end--;
+	}
+    }
+    e = realloc(d->entries, d->num_entries * sizeof(*d->entries));
+    if(e != NULL)
+	d->entries = e;
+    return 0;
+}
+
+krb5_kt_ops krb5_mkt_ops = {
+    "MEMORY",
+    mkt_resolve,
+    mkt_get_name,
+    mkt_close,
+    NULL, /* get */
+    mkt_start_seq_get,
+    mkt_next_entry,
+    mkt_end_seq_get,
+    mkt_add_entry,
+    mkt_remove_entry
+};