src/session_server_ch.h - github/CESNET/libnetconf2 - Gitiles

 /**
  * \file session_server_ch.h
  * \author Michal Vasko <mvasko@cesnet.cz>
  * \brief libnetconf2 Call Home session server manipulation
  *
  * Copyright (c) 2015 CESNET, z.s.p.o.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  * 3. Neither the name of the Company nor the names of its contributors
  *    may be used to endorse or promote products derived from this
  *    software without specific prior written permission.
  *
  */

 #ifndef NC_SESSION_SERVER_CH_H_
 #define NC_SESSION_SERVER_CH_H_

 #include <stdint.h>
 #include <libyang/libyang.h>

 #include "session.h"
 #include "netconf.h"

 #ifdef ENABLE_SSH

 /**
  * @brief Establish an SSH Call Home connection with a listening NETCONF client.
  *
  * @param[in] host Host the client is listening on.
  * @param[in] port Port the client is listening on.
  * @param[in] timeout Timeout for transport-related operations in milliseconds.
  *                    0 for non-blocking call, -1 for infinite waiting.
  * @param[out] session New Call Home session.
  * @return 1 on success, 0 on timeout, -1 on error.
  */
 int nc_connect_callhome_ssh(const char *host, uint16_t port, int timeout, struct nc_session **session);

 /**
  * @brief Set Call Home SSH host keys the server will identify itself with. Each of RSA, DSA, and
  *        ECDSA keys can be set. If the particular type was already set, it is replaced.
  *
  * @param[in] privkey_path Path to a private key.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_set_hostkey(const char *privkey_path);

 /**
  * @brief Set Call Home SSH banner the server will send to every client.
  *
  * @param[in] banner SSH banner.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_set_banner(const char *banner);

 /**
  * @brief Set accepted Call Home SSH authentication methods. All (publickey, password, interactive)
  *        are supported by default.
  *
  * @param[in] auth_methods Accepted authentication methods bit field of NC_SSH_AUTH_TYPE.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_set_auth_methods(int auth_methods);

 /**
  * @brief Set Call Home SSH authentication attempts of every client. 3 by default.
  *
  * @param[in] auth_attempts Failed authentication attempts before a client is dropped.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_set_auth_attempts(uint16_t auth_attempts);

 /**
  * @brief Set Call Home SSH authentication timeout. 10 seconds by default.
  *
  * @param[in] auth_timeout Number of seconds before an unauthenticated client is dropped.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_set_auth_timeout(uint16_t auth_timeout);

 /**
  * @brief Add an authorized Call Home client SSH public key. This public key can be used for
  *        publickey authentication afterwards.
  *
  * @param[in] pubkey_path Path to the public key.
  * @param[in] username Username that the client with the public key must use.
  * @return 0 on success, -1 on error.
  */
 int nc_server_ssh_ch_add_authkey(const char *pubkey_path, const char *username);

 /**
  * @brief Remove an authorized Call Home client SSH public key.
  *
  * @param[in] pubkey_path Path to an authorized public key. NULL matches all the keys.
  * @param[in] username Username for an authorized public key. NULL matches all the usernames.
  * @return 0 on success, -1 on not finding any match.
  */
 int nc_server_ssh_ch_del_authkey(const char *pubkey_path, const char *username);

 /**
  * @brief Clear all the SSH Call Home options. Afterwards a new set of options
  *        can be set for the next client to connect to.
  */
 void nc_server_ssh_ch_clear_opts(void);

 #endif /* ENABLE_SSH */

 #ifdef ENABLE_TLS

 /**
  * @brief Establish a TLS Call Home connection with a listening NETCONF client.
  *
  * @param[in] host Host the client is listening on.
  * @param[in] port Port the client is listening on.
  * @param[in] timeout Timeout for transport-related operations in milliseconds.
  *                    0 for non-blocking call, -1 for infinite waiting.
  * @param[out] session New Call Home session.
  * @return 1 on success, 0 on timeout, -1 on error.
  */
 int nc_connect_callhome_tls(const char *host, uint16_t port, int timeout, struct nc_session **session);

 /**
  * @brief Set server Call Home TLS certificate. Alternative to nc_tls_server_set_cert_path().
  *        There can only be one certificate for each key type, it is replaced if already set.
  *
  * @param[in] cert Base64-encoded certificate in ASN.1 DER encoding.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_cert(const char *cert);

 /**
  * @brief Set server Call Home TLS certificate. Alternative to nc_tls_server_set_cert().
  *        There can only be one certificate for each key type, it is replaced if already set.
  *
  * @param[in] cert_path Path to a certificate file in PEM format.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_cert_path(const char *cert_path);

 /**
  * @brief Set server Call Home TLS private key matching the certificate.
  *        Alternative to nc_tls_server_set_key_path(). There can only be one of every key
  *        type, it is replaced if already set.
  *
  * @param[in] privkey Base64-encoded certificate in ASN.1 DER encoding.
  * @param[in] is_rsa Whether \p privkey are the data of an RSA (1) or DSA (0) key.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_key(const char *privkey, int is_rsa);

 /**
  * @brief Set server Call Home TLS private key matching the certificate.
  *        Alternative to nc_tls_server_set_key_path(). There can only be one of every key
  *        type, it is replaced if already set.
  *
  * @param[in] privkey_path Path to a private key file in PEM format.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_key_path(const char *privkey_path);

 /**
  * @brief Add a Call Home trusted certificate. Can be both a CA or a client one.
  *
  * @param[in] cert Base64-enocded certificate in ASN.1 DER encoding.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_add_trusted_cert(const char *cert);

 /**
  * @brief Add a Call Home trusted certificate. Can be both a CA or a client one.
  *
  * @param[in] cert_path Path to a trusted certificate file in PEM format.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_add_trusted_cert_path(const char *cert_path);

 /**
  * @brief Set trusted Call Home Certificate Authority certificate locations. There
  *        can only be one file and one directory, they are replaced if already set.
  *
  * @param[in] cacert_file_path Path to a trusted CA cert store file in PEM format.
  *                             Can be NULL.
  * @param[in] cacert_dir_path Path to a trusted CA cert store hashed directory
  *                            (c_rehash utility can be used to create hashes)
  *                            with PEM files. Can be NULL.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_trusted_cacert_locations(const char *cacert_file_path, const char *cacert_dir_path);

 /**
  * @brief Destroy and clean all the set Call Home certificates and private keys.
  *        CRLs and CTN entries are not affected.
  */
 void nc_server_tls_ch_clear_certs(void);

 /**
  * @brief Set Call Home Certificate Revocation List locations. There can only be
  *        one file and one directory, they are replaced if already set.
  *
  * @param[in] crl_file_path Path to a CRL store file in PEM format. Can be NULL.
  * @param[in] crl_dir_path Path to a CRL store hashed directory (c_rehash utility
  *                         can be used to create hashes) with PEM files. Can be NULL.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_set_crl_locations(const char *crl_file_path, const char *crl_dir_path);

 /**
  * @brief Destroy and clean Call Home CRLs. Call Home certificates, private keys,
  *        and CTN entries are not affected.
  */
 void nc_server_tls_ch_clear_crls(void);

 /**
  * @brief Add a Call Home Cert-to-name entry.
  *
  * @param[in] id Priority of the entry.
  * @param[in] fingerprint Matching certificate fingerprint.
  * @param[in] map_type Type of username-certificate mapping.
  * @param[in] name Specific username if \p map_type == NC_TLS_CTN_SPECIFED. Must be NULL otherwise.
  * @return 0 on success, -1 on error.
  */
 int nc_server_tls_ch_add_ctn(uint32_t id, const char *fingerprint, NC_TLS_CTN_MAPTYPE map_type, const char *name);

 /**
  * @brief Remove a Call Home Cert-to-name entry.
  *
  * @param[in] id Priority of the entry. -1 matches all the priorities.
  * @param[in] fingerprint Fingerprint fo the entry. NULL matches all the fingerprints.
  * @param[in] map_type Mapping type of the entry. 0 matches all the mapping types.
  * @param[in] name Specific username for the entry. NULL matches all the usernames.
  * @return 0 on success, -1 on not finding any match.
  */
 int nc_server_tls_ch_del_ctn(int64_t id, const char *fingerprint, NC_TLS_CTN_MAPTYPE map_type, const char *name);

 /**
  * @brief Clear all the TLS Call Home options. Afterwards a new set of options
  *        can be set for the next client to connect.
  */
 void nc_server_tls_ch_clear_opts(void);

 #endif /* ENABLE_TLS */

 #endif /* NC_SESSION_SERVER_CH_H_ */
	/**
	* \file session_server_ch.h
	* \author Michal Vasko <mvasko@cesnet.cz>
	* \brief libnetconf2 Call Home session server manipulation
	*
	* Copyright (c) 2015 CESNET, z.s.p.o.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	* 3. Neither the name of the Company nor the names of its contributors
	* may be used to endorse or promote products derived from this
	* software without specific prior written permission.
	*
	*/

	#ifndef NC_SESSION_SERVER_CH_H_
	#define NC_SESSION_SERVER_CH_H_

	#include <stdint.h>
	#include <libyang/libyang.h>

	#include "session.h"
	#include "netconf.h"

	#ifdef ENABLE_SSH

	/**
	* @brief Establish an SSH Call Home connection with a listening NETCONF client.
	*
	* @param[in] host Host the client is listening on.
	* @param[in] port Port the client is listening on.
	* @param[in] timeout Timeout for transport-related operations in milliseconds.
	* 0 for non-blocking call, -1 for infinite waiting.
	* @param[out] session New Call Home session.
	* @return 1 on success, 0 on timeout, -1 on error.
	*/
	int nc_connect_callhome_ssh(const char host, uint16_t port, int timeout, struct nc_session *session);

	/**
	* @brief Set Call Home SSH host keys the server will identify itself with. Each of RSA, DSA, and
	* ECDSA keys can be set. If the particular type was already set, it is replaced.
	*
	* @param[in] privkey_path Path to a private key.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_set_hostkey(const char *privkey_path);

	/**
	* @brief Set Call Home SSH banner the server will send to every client.
	*
	* @param[in] banner SSH banner.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_set_banner(const char *banner);

	/**
	* @brief Set accepted Call Home SSH authentication methods. All (publickey, password, interactive)
	* are supported by default.
	*
	* @param[in] auth_methods Accepted authentication methods bit field of NC_SSH_AUTH_TYPE.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_set_auth_methods(int auth_methods);

	/**
	* @brief Set Call Home SSH authentication attempts of every client. 3 by default.
	*
	* @param[in] auth_attempts Failed authentication attempts before a client is dropped.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_set_auth_attempts(uint16_t auth_attempts);

	/**
	* @brief Set Call Home SSH authentication timeout. 10 seconds by default.
	*
	* @param[in] auth_timeout Number of seconds before an unauthenticated client is dropped.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_set_auth_timeout(uint16_t auth_timeout);

	/**
	* @brief Add an authorized Call Home client SSH public key. This public key can be used for
	* publickey authentication afterwards.
	*
	* @param[in] pubkey_path Path to the public key.
	* @param[in] username Username that the client with the public key must use.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_ssh_ch_add_authkey(const char pubkey_path, const char username);

	/**
	* @brief Remove an authorized Call Home client SSH public key.
	*
	* @param[in] pubkey_path Path to an authorized public key. NULL matches all the keys.
	* @param[in] username Username for an authorized public key. NULL matches all the usernames.
	* @return 0 on success, -1 on not finding any match.
	*/
	int nc_server_ssh_ch_del_authkey(const char pubkey_path, const char username);

	/**
	* @brief Clear all the SSH Call Home options. Afterwards a new set of options
	* can be set for the next client to connect to.
	*/
	void nc_server_ssh_ch_clear_opts(void);

	#endif /* ENABLE_SSH */

	#ifdef ENABLE_TLS

	/**
	* @brief Establish a TLS Call Home connection with a listening NETCONF client.
	*
	* @param[in] host Host the client is listening on.
	* @param[in] port Port the client is listening on.
	* @param[in] timeout Timeout for transport-related operations in milliseconds.
	* 0 for non-blocking call, -1 for infinite waiting.
	* @param[out] session New Call Home session.
	* @return 1 on success, 0 on timeout, -1 on error.
	*/
	int nc_connect_callhome_tls(const char host, uint16_t port, int timeout, struct nc_session *session);

	/**
	* @brief Set server Call Home TLS certificate. Alternative to nc_tls_server_set_cert_path().
	* There can only be one certificate for each key type, it is replaced if already set.
	*
	* @param[in] cert Base64-encoded certificate in ASN.1 DER encoding.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_cert(const char *cert);

	/**
	* @brief Set server Call Home TLS certificate. Alternative to nc_tls_server_set_cert().
	* There can only be one certificate for each key type, it is replaced if already set.
	*
	* @param[in] cert_path Path to a certificate file in PEM format.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_cert_path(const char *cert_path);

	/**
	* @brief Set server Call Home TLS private key matching the certificate.
	* Alternative to nc_tls_server_set_key_path(). There can only be one of every key
	* type, it is replaced if already set.
	*
	* @param[in] privkey Base64-encoded certificate in ASN.1 DER encoding.
	* @param[in] is_rsa Whether \p privkey are the data of an RSA (1) or DSA (0) key.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_key(const char *privkey, int is_rsa);

	/**
	* @brief Set server Call Home TLS private key matching the certificate.
	* Alternative to nc_tls_server_set_key_path(). There can only be one of every key
	* type, it is replaced if already set.
	*
	* @param[in] privkey_path Path to a private key file in PEM format.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_key_path(const char *privkey_path);

	/**
	* @brief Add a Call Home trusted certificate. Can be both a CA or a client one.
	*
	* @param[in] cert Base64-enocded certificate in ASN.1 DER encoding.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_add_trusted_cert(const char *cert);

	/**
	* @brief Add a Call Home trusted certificate. Can be both a CA or a client one.
	*
	* @param[in] cert_path Path to a trusted certificate file in PEM format.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_add_trusted_cert_path(const char *cert_path);

	/**
	* @brief Set trusted Call Home Certificate Authority certificate locations. There
	* can only be one file and one directory, they are replaced if already set.
	*
	* @param[in] cacert_file_path Path to a trusted CA cert store file in PEM format.
	* Can be NULL.
	* @param[in] cacert_dir_path Path to a trusted CA cert store hashed directory
	* (c_rehash utility can be used to create hashes)
	* with PEM files. Can be NULL.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_trusted_cacert_locations(const char cacert_file_path, const char cacert_dir_path);

	/**
	* @brief Destroy and clean all the set Call Home certificates and private keys.
	* CRLs and CTN entries are not affected.
	*/
	void nc_server_tls_ch_clear_certs(void);

	/**
	* @brief Set Call Home Certificate Revocation List locations. There can only be
	* one file and one directory, they are replaced if already set.
	*
	* @param[in] crl_file_path Path to a CRL store file in PEM format. Can be NULL.
	* @param[in] crl_dir_path Path to a CRL store hashed directory (c_rehash utility
	* can be used to create hashes) with PEM files. Can be NULL.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_set_crl_locations(const char crl_file_path, const char crl_dir_path);

	/**
	* @brief Destroy and clean Call Home CRLs. Call Home certificates, private keys,
	* and CTN entries are not affected.
	*/
	void nc_server_tls_ch_clear_crls(void);

	/**
	* @brief Add a Call Home Cert-to-name entry.
	*
	* @param[in] id Priority of the entry.
	* @param[in] fingerprint Matching certificate fingerprint.
	* @param[in] map_type Type of username-certificate mapping.
	* @param[in] name Specific username if \p map_type == NC_TLS_CTN_SPECIFED. Must be NULL otherwise.
	* @return 0 on success, -1 on error.
	*/
	int nc_server_tls_ch_add_ctn(uint32_t id, const char fingerprint, NC_TLS_CTN_MAPTYPE map_type, const char name);

	/**
	* @brief Remove a Call Home Cert-to-name entry.
	*
	* @param[in] id Priority of the entry. -1 matches all the priorities.
	* @param[in] fingerprint Fingerprint fo the entry. NULL matches all the fingerprints.
	* @param[in] map_type Mapping type of the entry. 0 matches all the mapping types.
	* @param[in] name Specific username for the entry. NULL matches all the usernames.
	* @return 0 on success, -1 on not finding any match.
	*/
	int nc_server_tls_ch_del_ctn(int64_t id, const char fingerprint, NC_TLS_CTN_MAPTYPE map_type, const char name);

	/**
	* @brief Clear all the TLS Call Home options. Afterwards a new set of options
	* can be set for the next client to connect.
	*/
	void nc_server_tls_ch_clear_opts(void);

	#endif /* ENABLE_TLS */

	#endif /* NC_SESSION_SERVER_CH_H_ */