text: /*
   * 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.
   */
  
  #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);
  }
  