/*

 * Copyright (c) 2018-2022 Yubico AB. All rights reserved.

 * Use of this source code is governed by a BSD-style

 * license that can be found in the LICENSE file.

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include <openssl/sha.h>

#include "fido.h"

int

fido_dev_get_touch_begin(fido_dev_t *dev)

{

        fido_blob_t      f;

        cbor_item_t     *argv[9];

        const char      *clientdata = FIDO_DUMMY_CLIENTDATA;

        const uint8_t    user_id = FIDO_DUMMY_USER_ID;

        unsigned char    cdh[SHA256_DIGEST_LENGTH];

        fido_rp_t        rp;

        fido_user_t      user;

        int              ms = dev->timeout_ms;

        int              r = FIDO_ERR_INTERNAL;

        memset(&f, 0, sizeof(f));

        memset(argv, 0, sizeof(argv));

        memset(cdh, 0, sizeof(cdh));

        memset(&rp, 0, sizeof(rp));

        memset(&user, 0, sizeof(user));

        if (fido_dev_is_fido2(dev) == false)

                return (u2f_get_touch_begin(dev, &ms));

        if (SHA256((const void *)clientdata, strlen(clientdata), cdh) != cdh) {

                fido_log_debug("%s: sha256", __func__);

                return (FIDO_ERR_INTERNAL);

        }

        if ((rp.id = strdup(FIDO_DUMMY_RP_ID)) == NULL ||

            (user.name = strdup(FIDO_DUMMY_USER_NAME)) == NULL) {

                fido_log_debug("%s: strdup", __func__);

                goto fail;

        }

        if (fido_blob_set(&user.id, &user_id, sizeof(user_id)) < 0) {

                fido_log_debug("%s: fido_blob_set", __func__);

                goto fail;

        }

        if ((argv[0] = cbor_build_bytestring(cdh, sizeof(cdh))) == NULL ||

            (argv[1] = cbor_encode_rp_entity(&rp)) == NULL ||

            (argv[2] = cbor_encode_user_entity(&user)) == NULL ||

            (argv[3] = cbor_encode_pubkey_param(COSE_ES256)) == NULL) {

                fido_log_debug("%s: cbor encode", __func__);

                goto fail;

        }

        if (fido_dev_supports_pin(dev)) {

                if ((argv[7] = cbor_new_definite_bytestring()) == NULL ||

                    (argv[8] = cbor_encode_pin_opt(dev)) == NULL) {

                        fido_log_debug("%s: cbor encode", __func__);

                        goto fail;

                }

        }

        if (cbor_build_frame(CTAP_CBOR_MAKECRED, argv, nitems(argv), &f) < 0 ||

            fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, &ms) < 0) {

                fido_log_debug("%s: fido_tx", __func__);

                r = FIDO_ERR_TX;

                goto fail;

        }

        r = FIDO_OK;

fail:

        cbor_vector_free(argv, nitems(argv));

        free(f.ptr);

        free(rp.id);

        free(user.name);

        free(user.id.ptr);

        return (r);

}

int

fido_dev_get_touch_status(fido_dev_t *dev, int *touched, int ms)

{

        int r;

        *touched = 0;

        if (fido_dev_is_fido2(dev) == false)

                return (u2f_get_touch_status(dev, touched, &ms));

        switch ((r = fido_rx_cbor_status(dev, &ms))) {

        case FIDO_ERR_PIN_AUTH_INVALID:

        case FIDO_ERR_PIN_INVALID:

        case FIDO_ERR_PIN_NOT_SET:

        case FIDO_ERR_SUCCESS:

                *touched = 1;

                break;

        case FIDO_ERR_RX:

                /* ignore */

                break;

        default:

                fido_log_debug("%s: fido_rx_cbor_status", __func__);

                return (r);

        }

        return (FIDO_OK);

}