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diff --git a/libetpan/include/libetpan/mailprivacy_types.h b/libetpan/include/libetpan/mailprivacy_types.h
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+/*
+ * libEtPan! -- a mail library
+ *
+ * Copyright (C) 2001, 2005 - DINH Viet Hoa
+ * 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 libEtPan! project 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 AUTHORS 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 AUTHORS 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.
+ */
+
+/*
+ * $Id$
+ */
+
+#ifndef MAIL_PRIVACY_TYPES_H
+
+#define MAIL_PRIVACY_TYPES_H
+
+#include <libetpan/chash.h>
+#include <libetpan/carray.h>
+#include <libetpan/mailmessage.h>
+#include <libetpan/mailmime.h>
+
+struct mailprivacy {
+  char * tmp_dir;               /* working tmp directory */
+  chash * msg_ref;              /* mailmessage => present or not */
+  chash * mmapstr;              /* mmapstring => present or not present */
+  chash * mime_ref;             /* mime => present or not */
+  carray * protocols;
+  int make_alternative;
+  /* if make_alternative is 0, replaces the part with decrypted 
+     part, if 1, adds a multipart/alternative and put the decrypted 
+     and encrypted part as subparts.
+  */
+};
+
+struct mailprivacy_encryption {
+  char * name;
+  char * description;
+  
+  int (* encrypt)(struct mailprivacy *,
+      struct mailmime *, struct mailmime **);
+};
+
+struct mailprivacy_protocol {
+  char * name;
+  char * description;
+  
+  /* introduce to easy the port to sylpheed */
+  int (* is_encrypted)(struct mailprivacy *,
+      mailmessage *, struct mailmime *);
+  
+  int (* decrypt)(struct mailprivacy *,
+      mailmessage *, struct mailmime *,
+      struct mailmime **);
+  
+  int encryption_count;
+  struct mailprivacy_encryption * encryption_tab;
+};
+
+#endif