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/*
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* GnuTLS PIN support for PKCS#11 or TPM
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* Copyright (C) 2010-2012 Free Software Foundation, Inc.
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*
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* Authors: Nikos Mavrogiannopoulos
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*
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* The GnuTLS 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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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>
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*/
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#include "gnutls_int.h"
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#include <gnutls/pkcs11.h>
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#include <pin.h>
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#include "errors.h"
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gnutls_pin_callback_t _gnutls_pin_func;
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void *_gnutls_pin_data;
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/**
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* gnutls_pkcs11_set_pin_function:
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* @fn: The PIN callback, a gnutls_pin_callback_t() function.
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* @userdata: data to be supplied to callback
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*
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* This function will set a callback function to be used when a PIN is
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* required for PKCS 11 operations. See
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* gnutls_pin_callback_t() on how the callback should behave.
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*
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* Since: 2.12.0
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**/
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void
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gnutls_pkcs11_set_pin_function(gnutls_pin_callback_t fn, void *userdata)
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{
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_gnutls_pin_func = fn;
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_gnutls_pin_data = userdata;
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}
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/**
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* gnutls_pkcs11_get_pin_function:
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* @userdata: data to be supplied to callback
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*
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* This function will return the callback function set using
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* gnutls_pkcs11_set_pin_function().
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*
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* Returns: The function set or NULL otherwise.
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*
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* Since: 3.1.0
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**/
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gnutls_pin_callback_t gnutls_pkcs11_get_pin_function(void **userdata)
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{
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if (_gnutls_pin_func != NULL) {
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*userdata = _gnutls_pin_data;
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return _gnutls_pin_func;
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}
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return NULL;
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}
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int
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_gnutls_retrieve_pin(struct pin_info_st *pin_info, const char *url, const char *label,
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unsigned flags,
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char pin[GNUTLS_PKCS11_MAX_PIN_LEN], unsigned pin_size)
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{
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int ret;
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if (pin_info && pin_info->cb)
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ret =
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pin_info->cb(pin_info->data, 0,
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(char *) url, label, flags,
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pin, pin_size);
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else if (_gnutls_pin_func)
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ret =
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_gnutls_pin_func(_gnutls_pin_data, 0,
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(char *) url, label, flags,
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pin, pin_size);
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else
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ret = gnutls_assert_val(GNUTLS_E_PKCS11_PIN_ERROR);
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return ret;
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}
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