new file

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9810 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/keytab_any.c

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+/*
+ * Copyright (c) 2001 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. 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("$Id$");
+
+struct any_data {
+    krb5_keytab kt;
+    char *name;
+    struct any_data *next;
+};
+
+static void
+free_list (struct any_data *a)
+{
+    struct any_data *next;
+
+    for (; a != NULL; a = next) {
+	next = a->next;
+	free (a->name);
+	free (a);
+    }
+}
+
+static krb5_error_code
+any_resolve(krb5_context context, const char *name, krb5_keytab id)
+{
+    struct any_data *a, *a0 = NULL, *prev = NULL;
+    krb5_error_code ret;
+    char buf[256];
+
+    while (strsep_copy(&name, ",", buf, sizeof(buf)) != -1) {
+	a = malloc(sizeof(*a));
+	if (a == NULL) {
+	    ret = ENOMEM;
+	    goto fail;
+	}
+	if (a0 == NULL) {
+	    a0 = a;
+	    a->name = strdup(name);
+	    if (a->name == NULL) {
+		ret = ENOMEM;
+		goto fail;
+	    }
+	} else
+	    a->name = NULL;
+	if (prev != NULL)
+	    prev->next = a;
+	a->next = NULL;
+	ret = krb5_kt_resolve (context, buf, &a->kt);
+	if (ret)
+	    goto fail;
+	prev = a;
+    }
+    if (a0 == NULL)
+	return ENOENT;
+    id->data = a0;
+    return 0;
+ fail:
+    free_list (a0);
+    return ret;
+}
+
+static krb5_error_code
+any_get_name (krb5_context context,
+	      krb5_keytab id,
+	      char *name,
+	      size_t namesize)
+{
+    struct any_data *a = id->data;
+    strlcpy(name, a->name, namesize);
+    return 0;
+}
+
+static krb5_error_code
+any_close (krb5_context context,
+	   krb5_keytab id)
+{
+    struct any_data *a = id->data;
+
+    free_list (a);
+    return 0;
+}
+
+struct any_cursor_extra_data {
+    struct any_data *a;
+    krb5_kt_cursor cursor;
+};
+
+static krb5_error_code
+any_start_seq_get(krb5_context context, 
+		  krb5_keytab id, 
+		  krb5_kt_cursor *c)
+{
+    struct any_data *a = id->data;
+    struct any_cursor_extra_data *ed;
+    krb5_error_code ret;
+
+    c->data = malloc (sizeof(struct any_cursor_extra_data));
+    if(c->data == NULL)
+	return ENOMEM;
+    ed = (struct any_cursor_extra_data *)c->data;
+    ed->a = a;
+    ret = krb5_kt_start_seq_get(context, ed->a->kt, &ed->cursor);
+    if (ret) {
+	free (ed);
+	free (c->data);
+	c->data = NULL;
+	return ENOMEM;
+    }
+    return 0;
+}
+
+static krb5_error_code
+any_next_entry (krb5_context context,
+		krb5_keytab id,
+		krb5_keytab_entry *entry,
+		krb5_kt_cursor *cursor)
+{
+    krb5_error_code ret, ret2;
+    struct any_cursor_extra_data *ed;
+
+    ed = (struct any_cursor_extra_data *)cursor->data;
+    do {
+	ret = krb5_kt_next_entry(context, ed->a->kt, entry, &ed->cursor);
+	if (ret == 0)
+	    return 0;
+	else if (ret == KRB5_CC_END) {
+	    ret2 = krb5_kt_end_seq_get (context, ed->a->kt, &ed->cursor);
+	    if (ret2)
+		return ret2;
+	    ed->a = ed->a->next;
+	    if (ed->a == NULL)
+		return KRB5_CC_END;
+	    ret2 = krb5_kt_start_seq_get(context, ed->a->kt, &ed->cursor);
+	    if (ret2)
+		return ret2;
+	} else
+	    return ret;
+    } while (ret == KRB5_CC_END);
+    return ret;
+}
+
+static krb5_error_code
+any_end_seq_get(krb5_context context,
+		krb5_keytab id,
+		krb5_kt_cursor *cursor)
+{
+    krb5_error_code ret = 0;
+    struct any_cursor_extra_data *ed;
+
+    ed = (struct any_cursor_extra_data *)cursor->data;
+    if (ed->a != NULL)
+	ret = krb5_kt_end_seq_get(context, ed->a->kt, &ed->cursor);
+    free (ed);
+    cursor->data = NULL;
+    return ret;
+}
+
+const krb5_kt_ops krb5_any_ops = {
+    "ANY",
+    any_resolve,
+    any_get_name,
+    any_close,
+    NULL, /* get */
+    any_start_seq_get,
+    any_next_entry,
+    any_end_seq_get,
+    NULL, /* add_entry */
+    NULL  /* remote_entry */
+};