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