src/common/dpp.h - android_external_wpa_supplicant_8 - Gitiles

 /*
  * DPP functionality shared between hostapd and wpa_supplicant
  * Copyright (c) 2017, Qualcomm Atheros, Inc.
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  */

 #ifndef DPP_H
 #define DPP_H

 #include <openssl/x509.h>

 #include "utils/list.h"
 #include "common/wpa_common.h"
 #include "crypto/sha256.h"

 #define DPP_HDR_LEN (4 + 2) /* OUI, OUI Type, Crypto Suite, DPP frame type */

 enum dpp_public_action_frame_type {
 	DPP_PA_AUTHENTICATION_REQ = 0,
 	DPP_PA_AUTHENTICATION_RESP = 1,
 	DPP_PA_AUTHENTICATION_CONF = 2,
 	DPP_PA_PEER_DISCOVERY_REQ = 5,
 	DPP_PA_PEER_DISCOVERY_RESP = 6,
 	DPP_PA_PKEX_EXCHANGE_REQ = 7,
 	DPP_PA_PKEX_EXCHANGE_RESP = 8,
 	DPP_PA_PKEX_COMMIT_REVEAL_REQ = 9,
 	DPP_PA_PKEX_COMMIT_REVEAL_RESP = 10,
 };

 enum dpp_attribute_id {
 	DPP_ATTR_STATUS = 0x1000,
 	DPP_ATTR_I_BOOTSTRAP_KEY_HASH = 0x1001,
 	DPP_ATTR_R_BOOTSTRAP_KEY_HASH = 0x1002,
 	DPP_ATTR_I_PROTOCOL_KEY = 0x1003,
 	DPP_ATTR_WRAPPED_DATA = 0x1004,
 	DPP_ATTR_I_NONCE = 0x1005,
 	DPP_ATTR_I_CAPABILITIES = 0x1006,
 	DPP_ATTR_R_NONCE = 0x1007,
 	DPP_ATTR_R_CAPABILITIES = 0x1008,
 	DPP_ATTR_R_PROTOCOL_KEY = 0x1009,
 	DPP_ATTR_I_AUTH_TAG = 0x100A,
 	DPP_ATTR_R_AUTH_TAG = 0x100B,
 	DPP_ATTR_CONFIG_OBJ = 0x100C,
 	DPP_ATTR_CONNECTOR = 0x100D,
 	DPP_ATTR_CONFIG_ATTR_OBJ = 0x100E,
 	DPP_ATTR_BOOTSTRAP_KEY = 0x100F,
 	DPP_ATTR_OWN_NET_NK_HASH = 0x1011,
 	DPP_ATTR_FINITE_CYCLIC_GROUP = 0x1012,
 	DPP_ATTR_ENCRYPTED_KEY = 0x1013,
 	DPP_ATTR_ENROLLEE_NONCE = 0x1014,
 	DPP_ATTR_CODE_IDENTIFIER = 0x1015,
 	DPP_ATTR_TRANSACTION_ID = 0x1016,
 };

 enum dpp_status_error {
 	DPP_STATUS_OK = 0,
 	DPP_STATUS_NOT_COMPATIBLE = 1,
 	DPP_STATUS_AUTH_FAILURE = 2,
 	DPP_STATUS_UNWRAP_FAILURE = 3,
 	DPP_STATUS_BAD_GROUP = 4,
 	DPP_STATUS_CONFIGURE_FAILURE = 5,
 	DPP_STATUS_RESPONSE_PENDING = 6,
 };

 #define DPP_CAPAB_ENROLLEE BIT(0)
 #define DPP_CAPAB_CONFIGURATOR BIT(1)
 #define DPP_CAPAB_ROLE_MASK (BIT(0) | BIT(1))

 #define DPP_BOOTSTRAP_MAX_FREQ 30
 #define DPP_MAX_NONCE_LEN 32
 #define DPP_MAX_HASH_LEN 64
 #define DPP_MAX_SHARED_SECRET_LEN 66

 struct dpp_curve_params {
 	const char *name;
 	size_t hash_len;
 	size_t aes_siv_key_len;
 	size_t nonce_len;
 	size_t prime_len;
 	const char *jwk_crv;
 	u16 ike_group;
 	const char *jws_alg;
 };

 enum dpp_bootstrap_type {
 	DPP_BOOTSTRAP_QR_CODE,
 	DPP_BOOTSTRAP_PKEX,
 };

 struct dpp_bootstrap_info {
 	struct dl_list list;
 	unsigned int id;
 	enum dpp_bootstrap_type type;
 	char *uri;
 	u8 mac_addr[ETH_ALEN];
 	char *info;
 	unsigned int freq[DPP_BOOTSTRAP_MAX_FREQ];
 	unsigned int num_freq;
 	int own;
 	EVP_PKEY *pubkey;
 	u8 pubkey_hash[SHA256_MAC_LEN];
 	const struct dpp_curve_params *curve;
 };

 struct dpp_pkex {
 	unsigned int initiator:1;
 	unsigned int exchange_done:1;
 	struct dpp_bootstrap_info *own_bi;
 	u8 own_mac[ETH_ALEN];
 	u8 peer_mac[ETH_ALEN];
 	char *identifier;
 	char *code;
 	EVP_PKEY *x;
 	EVP_PKEY *y;
 	u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
 	u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
 	u8 z[DPP_MAX_HASH_LEN];
 	EVP_PKEY *peer_bootstrap_key;
 	struct wpabuf *exchange_req;
 	struct wpabuf *exchange_resp;
 };

 struct dpp_configuration {
 	u8 ssid[32];
 	size_t ssid_len;
 	int dpp; /* whether to use DPP or legacy configuration */

 	/* For DPP configuration (connector) */
 	os_time_t netaccesskey_expiry;

 	/* TODO: groups */

 	/* For legacy configuration */
 	char *passphrase;
 	u8 psk[32];
 };

 struct dpp_authentication {
 	void *msg_ctx;
 	const struct dpp_curve_params *curve;
 	struct dpp_bootstrap_info *peer_bi;
 	struct dpp_bootstrap_info *own_bi;
 	u8 waiting_pubkey_hash[SHA256_MAC_LEN];
 	int response_pending;
 	enum dpp_status_error auth_resp_status;
 	u8 peer_mac_addr[ETH_ALEN];
 	u8 i_nonce[DPP_MAX_NONCE_LEN];
 	u8 r_nonce[DPP_MAX_NONCE_LEN];
 	u8 e_nonce[DPP_MAX_NONCE_LEN];
 	u8 i_capab;
 	u8 r_capab;
 	EVP_PKEY *own_protocol_key;
 	EVP_PKEY *peer_protocol_key;
 	struct wpabuf *req_msg;
 	struct wpabuf *resp_msg;
 	unsigned int curr_freq;
 	size_t secret_len;
 	u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
 	u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
 	u8 Lx[DPP_MAX_SHARED_SECRET_LEN];
 	u8 k1[DPP_MAX_HASH_LEN];
 	u8 k2[DPP_MAX_HASH_LEN];
 	u8 ke[DPP_MAX_HASH_LEN];
 	int initiator;
 	int configurator;
 	int remove_on_tx_status;
 	int auth_success;
 	struct wpabuf *conf_req;
 	struct dpp_configuration *conf_ap;
 	struct dpp_configuration *conf_sta;
 	struct dpp_configurator *conf;
 	char *connector; /* received signedConnector */
 	u8 ssid[SSID_MAX_LEN];
 	u8 ssid_len;
 	char passphrase[64];
 	u8 psk[PMK_LEN];
 	int psk_set;
 	struct wpabuf *net_access_key;
 	os_time_t net_access_key_expiry;
 	struct wpabuf *c_sign_key;
 #ifdef CONFIG_TESTING_OPTIONS
 	char *config_obj_override;
 	char *discovery_override;
 	char *groups_override;
 	unsigned int ignore_netaccesskey_mismatch:1;
 #endif /* CONFIG_TESTING_OPTIONS */
 };

 struct dpp_configurator {
 	struct dl_list list;
 	unsigned int id;
 	int own;
 	EVP_PKEY *csign;
 	char *kid;
 	const struct dpp_curve_params *curve;
 };

 struct dpp_introduction {
 	u8 pmkid[PMKID_LEN];
 	u8 pmk[PMK_LEN_MAX];
 	size_t pmk_len;
 };

 void dpp_bootstrap_info_free(struct dpp_bootstrap_info *info);
 const char * dpp_bootstrap_type_txt(enum dpp_bootstrap_type type);
 int dpp_bootstrap_key_hash(struct dpp_bootstrap_info *bi);
 int dpp_parse_uri_chan_list(struct dpp_bootstrap_info *bi,
 			    const char *chan_list);
 int dpp_parse_uri_mac(struct dpp_bootstrap_info *bi, const char *mac);
 int dpp_parse_uri_info(struct dpp_bootstrap_info *bi, const char *info);
 struct dpp_bootstrap_info * dpp_parse_qr_code(const char *uri);
 char * dpp_keygen(struct dpp_bootstrap_info *bi, const char *curve,
 		  const u8 *privkey, size_t privkey_len);
 struct dpp_authentication * dpp_auth_init(void *msg_ctx,
 					  struct dpp_bootstrap_info *peer_bi,
 					  struct dpp_bootstrap_info *own_bi,
 					  int configurator);
 struct dpp_authentication *
 dpp_auth_req_rx(void *msg_ctx, u8 dpp_allowed_roles, int qr_mutual,
 		struct dpp_bootstrap_info *peer_bi,
 		struct dpp_bootstrap_info *own_bi,
 		unsigned int freq, const u8 *hdr, const u8 *attr_start,
 		const u8 *wrapped_data, u16 wrapped_data_len);
 struct wpabuf *
 dpp_auth_resp_rx(struct dpp_authentication *auth, const u8 *hdr,
 		 const u8 *attr_start, size_t attr_len);
 struct wpabuf * dpp_build_conf_req(struct dpp_authentication *auth,
 				   const char *json);
 int dpp_auth_conf_rx(struct dpp_authentication *auth, const u8 *hdr,
 		     const u8 *attr_start, size_t attr_len);
 int dpp_notify_new_qr_code(struct dpp_authentication *auth,
 			   struct dpp_bootstrap_info *peer_bi);
 void dpp_configuration_free(struct dpp_configuration *conf);
 void dpp_auth_deinit(struct dpp_authentication *auth);
 struct wpabuf *
 dpp_conf_req_rx(struct dpp_authentication *auth, const u8 *attr_start,
 		size_t attr_len);
 int dpp_conf_resp_rx(struct dpp_authentication *auth,
 		     const struct wpabuf *resp);
 struct wpabuf * dpp_alloc_msg(enum dpp_public_action_frame_type type,
 			      size_t len);
 const u8 * dpp_get_attr(const u8 *buf, size_t len, u16 req_id, u16 *ret_len);
 int dpp_check_attrs(const u8 *buf, size_t len);
 int dpp_key_expired(const char *timestamp, os_time_t *expiry);
 void dpp_configurator_free(struct dpp_configurator *conf);
 struct dpp_configurator *
 dpp_keygen_configurator(const char *curve, const u8 *privkey,
 			size_t privkey_len);
 int dpp_configurator_own_config(struct dpp_authentication *auth,
 				const char *curve);
 int dpp_peer_intro(struct dpp_introduction *intro, const char *own_connector,
 		   const u8 *net_access_key, size_t net_access_key_len,
 		   const u8 *csign_key, size_t csign_key_len,
 		   const u8 *peer_connector, size_t peer_connector_len,
 		   os_time_t *expiry);
 struct dpp_pkex * dpp_pkex_init(struct dpp_bootstrap_info *bi,
 				const u8 *own_mac,
 				const char *identifier,
 				const char *code);
 struct dpp_pkex * dpp_pkex_rx_exchange_req(struct dpp_bootstrap_info *bi,
 					   const u8 *own_mac,
 					   const u8 *peer_mac,
 					   const char *identifier,
 					   const char *code,
 					   const u8 *buf, size_t len);
 struct wpabuf * dpp_pkex_rx_exchange_resp(struct dpp_pkex *pkex,
 					  const u8 *buf, size_t len);
 struct wpabuf * dpp_pkex_rx_commit_reveal_req(struct dpp_pkex *pkex,
 					      const u8 *hdr,
 					      const u8 *buf, size_t len);
 int dpp_pkex_rx_commit_reveal_resp(struct dpp_pkex *pkex, const u8 *hdr,
 				   const u8 *buf, size_t len);
 void dpp_pkex_free(struct dpp_pkex *pkex);

 #endif /* DPP_H */
	/*
	* DPP functionality shared between hostapd and wpa_supplicant
	* Copyright (c) 2017, Qualcomm Atheros, Inc.
	*
	* This software may be distributed under the terms of the BSD license.
	* See README for more details.
	*/

	#ifndef DPP_H
	#define DPP_H

	#include <openssl/x509.h>

	#include "utils/list.h"
	#include "common/wpa_common.h"
	#include "crypto/sha256.h"

	#define DPP_HDR_LEN (4 + 2) /* OUI, OUI Type, Crypto Suite, DPP frame type */

	enum dpp_public_action_frame_type {
	DPP_PA_AUTHENTICATION_REQ = 0,
	DPP_PA_AUTHENTICATION_RESP = 1,
	DPP_PA_AUTHENTICATION_CONF = 2,
	DPP_PA_PEER_DISCOVERY_REQ = 5,
	DPP_PA_PEER_DISCOVERY_RESP = 6,
	DPP_PA_PKEX_EXCHANGE_REQ = 7,
	DPP_PA_PKEX_EXCHANGE_RESP = 8,
	DPP_PA_PKEX_COMMIT_REVEAL_REQ = 9,
	DPP_PA_PKEX_COMMIT_REVEAL_RESP = 10,
	};

	enum dpp_attribute_id {
	DPP_ATTR_STATUS = 0x1000,
	DPP_ATTR_I_BOOTSTRAP_KEY_HASH = 0x1001,
	DPP_ATTR_R_BOOTSTRAP_KEY_HASH = 0x1002,
	DPP_ATTR_I_PROTOCOL_KEY = 0x1003,
	DPP_ATTR_WRAPPED_DATA = 0x1004,
	DPP_ATTR_I_NONCE = 0x1005,
	DPP_ATTR_I_CAPABILITIES = 0x1006,
	DPP_ATTR_R_NONCE = 0x1007,
	DPP_ATTR_R_CAPABILITIES = 0x1008,
	DPP_ATTR_R_PROTOCOL_KEY = 0x1009,
	DPP_ATTR_I_AUTH_TAG = 0x100A,
	DPP_ATTR_R_AUTH_TAG = 0x100B,
	DPP_ATTR_CONFIG_OBJ = 0x100C,
	DPP_ATTR_CONNECTOR = 0x100D,
	DPP_ATTR_CONFIG_ATTR_OBJ = 0x100E,
	DPP_ATTR_BOOTSTRAP_KEY = 0x100F,
	DPP_ATTR_OWN_NET_NK_HASH = 0x1011,
	DPP_ATTR_FINITE_CYCLIC_GROUP = 0x1012,
	DPP_ATTR_ENCRYPTED_KEY = 0x1013,
	DPP_ATTR_ENROLLEE_NONCE = 0x1014,
	DPP_ATTR_CODE_IDENTIFIER = 0x1015,
	DPP_ATTR_TRANSACTION_ID = 0x1016,
	};

	enum dpp_status_error {
	DPP_STATUS_OK = 0,
	DPP_STATUS_NOT_COMPATIBLE = 1,
	DPP_STATUS_AUTH_FAILURE = 2,
	DPP_STATUS_UNWRAP_FAILURE = 3,
	DPP_STATUS_BAD_GROUP = 4,
	DPP_STATUS_CONFIGURE_FAILURE = 5,
	DPP_STATUS_RESPONSE_PENDING = 6,
	};

	#define DPP_CAPAB_ENROLLEE BIT(0)
	#define DPP_CAPAB_CONFIGURATOR BIT(1)
	#define DPP_CAPAB_ROLE_MASK (BIT(0) \| BIT(1))

	#define DPP_BOOTSTRAP_MAX_FREQ 30
	#define DPP_MAX_NONCE_LEN 32
	#define DPP_MAX_HASH_LEN 64
	#define DPP_MAX_SHARED_SECRET_LEN 66

	struct dpp_curve_params {
	const char *name;
	size_t hash_len;
	size_t aes_siv_key_len;
	size_t nonce_len;
	size_t prime_len;
	const char *jwk_crv;
	u16 ike_group;
	const char *jws_alg;
	};

	enum dpp_bootstrap_type {
	DPP_BOOTSTRAP_QR_CODE,
	DPP_BOOTSTRAP_PKEX,
	};

	struct dpp_bootstrap_info {
	struct dl_list list;
	unsigned int id;
	enum dpp_bootstrap_type type;
	char *uri;
	u8 mac_addr[ETH_ALEN];
	char *info;
	unsigned int freq[DPP_BOOTSTRAP_MAX_FREQ];
	unsigned int num_freq;
	int own;
	EVP_PKEY *pubkey;
	u8 pubkey_hash[SHA256_MAC_LEN];
	const struct dpp_curve_params *curve;
	};

	struct dpp_pkex {
	unsigned int initiator:1;
	unsigned int exchange_done:1;
	struct dpp_bootstrap_info *own_bi;
	u8 own_mac[ETH_ALEN];
	u8 peer_mac[ETH_ALEN];
	char *identifier;
	char *code;
	EVP_PKEY *x;
	EVP_PKEY *y;
	u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
	u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
	u8 z[DPP_MAX_HASH_LEN];
	EVP_PKEY *peer_bootstrap_key;
	struct wpabuf *exchange_req;
	struct wpabuf *exchange_resp;
	};

	struct dpp_configuration {
	u8 ssid[32];
	size_t ssid_len;
	int dpp; /* whether to use DPP or legacy configuration */

	/* For DPP configuration (connector) */
	os_time_t netaccesskey_expiry;

	/* TODO: groups */

	/* For legacy configuration */
	char *passphrase;
	u8 psk[32];
	};

	struct dpp_authentication {
	void *msg_ctx;
	const struct dpp_curve_params *curve;
	struct dpp_bootstrap_info *peer_bi;
	struct dpp_bootstrap_info *own_bi;
	u8 waiting_pubkey_hash[SHA256_MAC_LEN];
	int response_pending;
	enum dpp_status_error auth_resp_status;
	u8 peer_mac_addr[ETH_ALEN];
	u8 i_nonce[DPP_MAX_NONCE_LEN];
	u8 r_nonce[DPP_MAX_NONCE_LEN];
	u8 e_nonce[DPP_MAX_NONCE_LEN];
	u8 i_capab;
	u8 r_capab;
	EVP_PKEY *own_protocol_key;
	EVP_PKEY *peer_protocol_key;
	struct wpabuf *req_msg;
	struct wpabuf *resp_msg;
	unsigned int curr_freq;
	size_t secret_len;
	u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
	u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
	u8 Lx[DPP_MAX_SHARED_SECRET_LEN];
	u8 k1[DPP_MAX_HASH_LEN];
	u8 k2[DPP_MAX_HASH_LEN];
	u8 ke[DPP_MAX_HASH_LEN];
	int initiator;
	int configurator;
	int remove_on_tx_status;
	int auth_success;
	struct wpabuf *conf_req;
	struct dpp_configuration *conf_ap;
	struct dpp_configuration *conf_sta;
	struct dpp_configurator *conf;
	char connector; / received signedConnector */
	u8 ssid[SSID_MAX_LEN];
	u8 ssid_len;
	char passphrase[64];
	u8 psk[PMK_LEN];
	int psk_set;
	struct wpabuf *net_access_key;
	os_time_t net_access_key_expiry;
	struct wpabuf *c_sign_key;
	#ifdef CONFIG_TESTING_OPTIONS
	char *config_obj_override;
	char *discovery_override;
	char *groups_override;
	unsigned int ignore_netaccesskey_mismatch:1;
	#endif /* CONFIG_TESTING_OPTIONS */
	};

	struct dpp_configurator {
	struct dl_list list;
	unsigned int id;
	int own;
	EVP_PKEY *csign;
	char *kid;
	const struct dpp_curve_params *curve;
	};

	struct dpp_introduction {
	u8 pmkid[PMKID_LEN];
	u8 pmk[PMK_LEN_MAX];
	size_t pmk_len;
	};

	void dpp_bootstrap_info_free(struct dpp_bootstrap_info *info);
	const char * dpp_bootstrap_type_txt(enum dpp_bootstrap_type type);
	int dpp_bootstrap_key_hash(struct dpp_bootstrap_info *bi);
	int dpp_parse_uri_chan_list(struct dpp_bootstrap_info *bi,
	const char *chan_list);
	int dpp_parse_uri_mac(struct dpp_bootstrap_info bi, const char mac);
	int dpp_parse_uri_info(struct dpp_bootstrap_info bi, const char info);
	struct dpp_bootstrap_info * dpp_parse_qr_code(const char *uri);
	char * dpp_keygen(struct dpp_bootstrap_info bi, const char curve,
	const u8 *privkey, size_t privkey_len);
	struct dpp_authentication * dpp_auth_init(void *msg_ctx,
	struct dpp_bootstrap_info *peer_bi,
	struct dpp_bootstrap_info *own_bi,
	int configurator);
	struct dpp_authentication *
	dpp_auth_req_rx(void *msg_ctx, u8 dpp_allowed_roles, int qr_mutual,
	struct dpp_bootstrap_info *peer_bi,
	struct dpp_bootstrap_info *own_bi,
	unsigned int freq, const u8 hdr, const u8 attr_start,
	const u8 *wrapped_data, u16 wrapped_data_len);
	struct wpabuf *
	dpp_auth_resp_rx(struct dpp_authentication auth, const u8 hdr,
	const u8 *attr_start, size_t attr_len);
	struct wpabuf * dpp_build_conf_req(struct dpp_authentication *auth,
	const char *json);
	int dpp_auth_conf_rx(struct dpp_authentication auth, const u8 hdr,
	const u8 *attr_start, size_t attr_len);
	int dpp_notify_new_qr_code(struct dpp_authentication *auth,
	struct dpp_bootstrap_info *peer_bi);
	void dpp_configuration_free(struct dpp_configuration *conf);
	void dpp_auth_deinit(struct dpp_authentication *auth);
	struct wpabuf *
	dpp_conf_req_rx(struct dpp_authentication auth, const u8 attr_start,
	size_t attr_len);
	int dpp_conf_resp_rx(struct dpp_authentication *auth,
	const struct wpabuf *resp);
	struct wpabuf * dpp_alloc_msg(enum dpp_public_action_frame_type type,
	size_t len);
	const u8 * dpp_get_attr(const u8 buf, size_t len, u16 req_id, u16 ret_len);
	int dpp_check_attrs(const u8 *buf, size_t len);
	int dpp_key_expired(const char timestamp, os_time_t expiry);
	void dpp_configurator_free(struct dpp_configurator *conf);
	struct dpp_configurator *
	dpp_keygen_configurator(const char curve, const u8 privkey,
	size_t privkey_len);
	int dpp_configurator_own_config(struct dpp_authentication *auth,
	const char *curve);
	int dpp_peer_intro(struct dpp_introduction intro, const char own_connector,
	const u8 *net_access_key, size_t net_access_key_len,
	const u8 *csign_key, size_t csign_key_len,
	const u8 *peer_connector, size_t peer_connector_len,
	os_time_t *expiry);
	struct dpp_pkex * dpp_pkex_init(struct dpp_bootstrap_info *bi,
	const u8 *own_mac,
	const char *identifier,
	const char *code);
	struct dpp_pkex * dpp_pkex_rx_exchange_req(struct dpp_bootstrap_info *bi,
	const u8 *own_mac,
	const u8 *peer_mac,
	const char *identifier,
	const char *code,
	const u8 *buf, size_t len);
	struct wpabuf * dpp_pkex_rx_exchange_resp(struct dpp_pkex *pkex,
	const u8 *buf, size_t len);
	struct wpabuf * dpp_pkex_rx_commit_reveal_req(struct dpp_pkex *pkex,
	const u8 *hdr,
	const u8 *buf, size_t len);
	int dpp_pkex_rx_commit_reveal_resp(struct dpp_pkex pkex, const u8 hdr,
	const u8 *buf, size_t len);
	void dpp_pkex_free(struct dpp_pkex *pkex);

	#endif /* DPP_H */