mirror of https://github.com/ARMmbed/mbed-os.git
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2017-2019, Arm Limited and affiliates.
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
#include "nsconfig.h"
|
|
#include "ns_types.h"
|
|
#include "string.h"
|
|
#include "common_functions.h"
|
|
#include "Security/PANA/pana_eap_header.h"
|
|
#if defined(PANA) || defined(HAVE_WS)
|
|
|
|
bool eap_header_parse(uint8_t *data_ptr, uint16_t length, eap_header_t *header)
|
|
{
|
|
if (length < 4) {
|
|
return false;
|
|
}
|
|
|
|
header->eap_code = *data_ptr++;
|
|
header->id_seq = *data_ptr++;
|
|
header->length = common_read_16_bit(data_ptr);
|
|
header->type = 0;
|
|
data_ptr += 2;
|
|
if (header->length < length || header->length > length) {
|
|
return false;
|
|
}
|
|
|
|
|
|
switch (header->eap_code) {
|
|
case EAP_REQ:
|
|
case EAP_RESPONSE:
|
|
if (header->length < 5) {
|
|
return false;
|
|
}
|
|
header->type = *data_ptr++;
|
|
break;
|
|
|
|
case EAP_SUCCESS:
|
|
case EAP_FAILURE:
|
|
if (header->length != 4) {
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
header->data_ptr = data_ptr;
|
|
return true;
|
|
|
|
}
|
|
|
|
uint8_t eap_header_size(uint8_t eap_code)
|
|
{
|
|
if (eap_code == EAP_REQ || eap_code == EAP_RESPONSE) {
|
|
return 5;
|
|
}
|
|
return 4;
|
|
}
|
|
|
|
uint8_t *eap_header_build(uint8_t *ptr, uint16_t data_length, uint8_t eap_code, uint8_t id_seq, uint8_t type)
|
|
{
|
|
*ptr++ = eap_code;
|
|
*ptr++ = id_seq;
|
|
ptr = common_write_16_bit(data_length, ptr);
|
|
if (eap_code == EAP_REQ || eap_code == EAP_RESPONSE) {
|
|
*ptr++ = type;
|
|
}
|
|
return ptr;
|
|
|
|
}
|
|
|
|
bool eap_tls_header_parse(uint8_t *eap_data_ptr, uint16_t eap_datalength, eap_tls_header_t *header)
|
|
{
|
|
header->tls_length = 0;
|
|
if (eap_datalength == 0) {
|
|
return false;
|
|
}
|
|
header->eap_tls_flags = *eap_data_ptr++;
|
|
eap_datalength--;
|
|
|
|
if (header->eap_tls_flags & EAP_TLS_FRAGMENT_LENGTH) {
|
|
if (eap_datalength < 4) {
|
|
return false;
|
|
}
|
|
uint32_t temp32 = common_read_32_bit(eap_data_ptr);
|
|
eap_datalength -= 4;
|
|
if (temp32 > 0x0000ffff) {
|
|
return false;
|
|
}
|
|
eap_data_ptr += 4;
|
|
header->tls_length = (uint16_t)temp32;
|
|
}
|
|
header->tls_frame_length = eap_datalength;
|
|
header->data_ptr = eap_data_ptr;
|
|
return true;
|
|
}
|
|
|
|
uint8_t eap_tls_header_size(uint16_t eap_tls_flags)
|
|
{
|
|
if (eap_tls_flags & EAP_TLS_FRAGMENT_LENGTH) {
|
|
return 5;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
uint8_t *eap_tls_header_build(uint8_t *ptr, uint16_t eap_tls_flags, uint16_t frame_length)
|
|
{
|
|
*ptr++ = eap_tls_flags;
|
|
//Test EAP Length Field
|
|
if (eap_tls_flags & EAP_TLS_FRAGMENT_LENGTH) {
|
|
ptr = common_write_32_bit(frame_length, ptr);
|
|
}
|
|
|
|
|
|
return ptr;
|
|
}
|
|
#endif
|