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ssl_ui.c
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/*
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* OpenConnect (SSL + DTLS) VPN client
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*
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* Copyright © 2008-2010 Intel Corporation.
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*
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* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* version 2.1, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to:
*
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include <openssl/ssl.h>
#include <openssl/ui.h>
/* OpenSSL UI method calls. These are just stubs, to show how it's done */
/* While we can set user data on the calls from the TPM setup, we can't
set it on the calls for PEM certificate passphrases, AFAICT. */
static int ui_open(UI *ui)
{
/* Fall through to default OpenSSL UI */
return UI_method_get_opener(UI_OpenSSL())(ui);
}
static int ui_read(UI *ui, UI_STRING *uis)
{
/* Fall through to default OpenSSL UI */
return UI_method_get_reader(UI_OpenSSL())(ui, uis);
}
static int ui_write(UI *ui, UI_STRING *uis)
{
/* Fall through to default OpenSSL UI */
return UI_method_get_writer(UI_OpenSSL())(ui, uis);
}
static int ui_close(UI *ui)
{
/* Fall through to default OpenSSL UI */
return UI_method_get_closer(UI_OpenSSL())(ui);
}
int set_openssl_ui(void)
{
UI_METHOD *ui_method = UI_create_method("AnyConnect VPN UI");
/* Set up a UI method of our own for password/passphrase requests */
UI_method_set_opener(ui_method, ui_open);
UI_method_set_reader(ui_method, ui_read);
UI_method_set_writer(ui_method, ui_write);
UI_method_set_closer(ui_method, ui_close);
UI_set_default_method(ui_method);
return 0;
}