bacnet_stack/src/bacnet/credential_authentication_factor.c

/**************************************************************************
 *
 * Copyright (C) 2015 Nikola Jelic <nikola.jelic@euroicc.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *********************************************************************/
#include <stdint.h>
#include "bacnet/credential_authentication_factor.h"
#include "bacnet/bacdcode.h"

int bacapp_encode_credential_authentication_factor(
    uint8_t *apdu, BACNET_CREDENTIAL_AUTHENTICATION_FACTOR *caf)
{
    int len;
    int apdu_len = 0;

    len = encode_context_enumerated(&apdu[apdu_len], 0, caf->disable);
    if (len < 0) {
        return -1;
    } else {
        apdu_len += len;
    }

    len = bacapp_encode_context_authentication_factor(
        &apdu[apdu_len], 1, &caf->authentication_factor);
    if (len < 0) {
        return -1;
    } else {
        apdu_len += len;
    }

    return apdu_len;
}

int bacapp_encode_context_credential_authentication_factor(
    uint8_t *apdu, uint8_t tag, BACNET_CREDENTIAL_AUTHENTICATION_FACTOR *caf)
{
    int len;
    int apdu_len = 0;

    len = encode_opening_tag(&apdu[apdu_len], tag);
    apdu_len += len;

    len = bacapp_encode_credential_authentication_factor(&apdu[apdu_len], caf);
    apdu_len += len;

    len = encode_closing_tag(&apdu[apdu_len], tag);
    apdu_len += len;

    return apdu_len;
}

int bacapp_decode_credential_authentication_factor(
    uint8_t *apdu, BACNET_CREDENTIAL_AUTHENTICATION_FACTOR *caf)
{
    int len;
    int apdu_len = 0;
    uint32_t disable = caf->disable;

    if (decode_is_context_tag(&apdu[apdu_len], 0)) {
        len = decode_context_enumerated(&apdu[apdu_len], 0, &disable);
        if (len < 0) {
            return -1;
        } else if (disable < ACCESS_AUTHENTICATION_FACTOR_DISABLE_MAX) {
            apdu_len += len;
            caf->disable = (BACNET_ACCESS_AUTHENTICATION_FACTOR_DISABLE)disable;
        } else {
            return -1;
        }
    } else {
        return -1;
    }

    if (decode_is_context_tag(&apdu[apdu_len], 1)) {
        len = bacapp_decode_context_authentication_factor(
            &apdu[apdu_len], 1, &caf->authentication_factor);
        if (len < 0) {
            return -1;
        } else {
            apdu_len += len;
        }
    } else {
        return -1;
    }

    return apdu_len;
}

int bacapp_decode_context_credential_authentication_factor(
    uint8_t *apdu, uint8_t tag, BACNET_CREDENTIAL_AUTHENTICATION_FACTOR *caf)
{
    int len = 0;
    int section_length;

    if (decode_is_opening_tag_number(&apdu[len], tag)) {
        len++;
        section_length =
            bacapp_decode_credential_authentication_factor(&apdu[len], caf);

        if (section_length == -1) {
            len = -1;
        } else {
            len += section_length;
            if (decode_is_closing_tag_number(&apdu[len], tag)) {
                len++;
            } else {
                len = -1;
            }
        }
    } else {
        len = -1;
    }
    return len;
}