Linux Manuals session 3

gnutls_hmac_get_len – API function Synopsis#include <gnutls/crypto.h> int gnutls_hmac_get_len(gnutls_mac_algorithm_t algorithm); Argumentsgnutls_mac_algorithm_t algorithm the hmac algorithm to useDescriptionThis function will return the length of the output data of the given hmac algorithm. ReturnsThe length or zero on error. Since2.10.0 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org CopyrightCopyright © 2001-2014 Free Software Foundation, Inc.. Copying…

gnutls_hmac_fast – API function Synopsis#include <gnutls/crypto.h> int gnutls_hmac_fast(gnutls_mac_algorithm_t algorithm, const void * key, size_t keylen, const void * text, size_t textlen, void * digest); Argumentsgnutls_mac_algorithm_t algorithm the hash algorithm to use const void * key the key to use size_t keylen The length of the key const void * text the data to hash size_t…

gnutls_hmac_deinit – API function Synopsis#include <gnutls/crypto.h> void gnutls_hmac_deinit(gnutls_hmac_hd_t handle, void * digest); Argumentsgnutls_hmac_hd_t handle is a gnutls_hmac_hd_t structure. void * digest is the output value of the MACDescriptionThis function will deinitialize all resources occupied by the given hmac context. Since2.10.0 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org CopyrightCopyright © 2001-2014 Free Software…

gnutls_hmac – API function Synopsis#include <gnutls/crypto.h> int gnutls_hmac(gnutls_hmac_hd_t handle, const void * text, size_t textlen); Argumentsgnutls_hmac_hd_t handle is a gnutls_cipher_hd_t structure. const void * text the data to hash size_t textlen The length of data to hashDescriptionThis function will hash the given data using the algorithm specified by the context. ReturnsZero or a negative error…

gnutls_hex_encode – API function Synopsis#include <gnutls/gnutls.h> int gnutls_hex_encode(const gnutls_datum_t * data, char * result, size_t * result_size); Argumentsconst gnutls_datum_t * data contain the raw data char * result the place where hex data will be copied size_t * result_size holds the size of the resultDescriptionThis function will convert the given data to printable data, using…

gnutls_hex_decode – API function Synopsis#include <gnutls/gnutls.h> int gnutls_hex_decode(const gnutls_datum_t * hex_data, void * result, size_t * result_size); Argumentsconst gnutls_datum_t * hex_data contain the encoded data void * result the place where decoded data will be copied size_t * result_size holds the size of the resultDescriptionThis function will decode the given encoded data, using the hex…

gnutls_hex2bin – API function Synopsis#include <gnutls/gnutls.h> int gnutls_hex2bin(const char * hex_data, size_t hex_size, void * bin_data, size_t * bin_size); Argumentsconst char * hex_data string with data in hex format size_t hex_size size of hex data void * bin_data output array with binary data size_t * bin_size when calling should hold maximum size of bin_data ,…

gnutls_heartbeat_set_timeouts – API function Synopsis#include <gnutls/gnutls.h> void gnutls_heartbeat_set_timeouts(gnutls_session_t session, unsigned int retrans_timeout, unsigned int total_timeout); Argumentsgnutls_session_t session is a gnutls_session_t structure. unsigned int retrans_timeout The time at which a retransmission will occur in milliseconds unsigned int total_timeout The time at which the connection will be aborted, in milliseconds.DescriptionThis function will override the timeouts for the…

gnutls_heartbeat_pong – API function Synopsis#include <gnutls/gnutls.h> int gnutls_heartbeat_pong(gnutls_session_t session, unsigned int flags); Argumentsgnutls_session_t session is a gnutls_session_t structure. unsigned int flags should be zeroDescriptionThis function replies to a ping by sending a pong to the peer. ReturnsGNUTLS_E_SUCCESS on success, otherwise a negative error code. Since3.1.2 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org…

gnutls_heartbeat_ping – API function Synopsis#include <gnutls/gnutls.h> int gnutls_heartbeat_ping(gnutls_session_t session, size_t data_size, unsigned int max_tries, unsigned int flags); Argumentsgnutls_session_t session is a gnutls_session_t structure. size_t data_size is the length of the ping payload. unsigned int max_tries if flags is GNUTLS_HEARTBEAT_WAIT then this sets the number of retransmissions. Use zero for indefinite (until timeout). unsigned int flags…

gnutls_heartbeat_get_timeout – API function Synopsis#include <gnutls/gnutls.h> unsigned int gnutls_heartbeat_get_timeout(gnutls_session_t session); Argumentsgnutls_session_t session is a gnutls_session_t structure.DescriptionThis function will return the milliseconds remaining for a retransmission of the previously sent ping message. This function is useful when ping is used in non-blocking mode, to estimate when to call gnutls_heartbeat_ping() if no packets have been received. Returnsthe…

gnutls_heartbeat_enable – API function Synopsis#include <gnutls/gnutls.h> void gnutls_heartbeat_enable(gnutls_session_t session, unsigned int type); Argumentsgnutls_session_t session is a gnutls_session_t structure. unsigned int type one of the GNUTLS_HB_* flagsDescriptionIf this function is called with the GNUTLS_HB_PEER_ALLOWED_TO_SEND  type , GnuTLS will allow heartbeat messages to be received. Moreover it also request the peer to accept heartbeat messages. If the type…

gnutls_heartbeat_allowed – API function Synopsis#include <gnutls/gnutls.h> int gnutls_heartbeat_allowed(gnutls_session_t session, unsigned int type); Argumentsgnutls_session_t session is a gnutls_session_t structure. unsigned int type one of GNUTLS_HB_LOCAL_ALLOWED_TO_SEND and GNUTLS_HB_PEER_ALLOWED_TO_SENDDescriptionThis function will check whether heartbeats are allowed to be sent or received in this session. ReturnsNon zero if heartbeats are allowed. Since3.1.2 Reporting BugsReport bugs to <bugs [at] gnutls.org>….

gnutls_hash_output – API function Synopsis#include <gnutls/crypto.h> void gnutls_hash_output(gnutls_hash_hd_t handle, void * digest); Argumentsgnutls_hash_hd_t handle is a gnutls_hash_hd_t structure. void * digest is the output value of the hashDescriptionThis function will output the current hash value and reset the state of the hash. Since2.10.0 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org CopyrightCopyright ©…

gnutls_hash_init – API function Synopsis#include <gnutls/crypto.h> int gnutls_hash_init(gnutls_hash_hd_t * dig, gnutls_digest_algorithm_t algorithm); Argumentsgnutls_hash_hd_t * dig is a gnutls_hash_hd_t structure. gnutls_digest_algorithm_t algorithm the hash algorithm to useDescriptionThis function will initialize an context that can be used to produce a Message Digest of data. This will effectively use the current crypto backend in use by gnutls or…

gnutls_hash_get_len – API function Synopsis#include <gnutls/crypto.h> int gnutls_hash_get_len(gnutls_digest_algorithm_t algorithm); Argumentsgnutls_digest_algorithm_t algorithm the hash algorithm to useDescriptionThis function will return the length of the output data of the given hash algorithm. ReturnsThe length or zero on error. Since2.10.0 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org CopyrightCopyright © 2001-2014 Free Software Foundation, Inc.. Copying…

gnutls_hash_fast – API function Synopsis#include <gnutls/crypto.h> int gnutls_hash_fast(gnutls_digest_algorithm_t algorithm, const void * text, size_t textlen, void * digest); Argumentsgnutls_digest_algorithm_t algorithm the hash algorithm to use const void * text the data to hash size_t textlen The length of data to hash void * digest is the output value of the hashDescriptionThis convenience function will hash…

gnutls_hash_deinit – API function Synopsis#include <gnutls/crypto.h> void gnutls_hash_deinit(gnutls_hash_hd_t handle, void * digest); Argumentsgnutls_hash_hd_t handle is a gnutls_hash_hd_t structure. void * digest is the output value of the hashDescriptionThis function will deinitialize all resources occupied by the given hash context. Since2.10.0 Reporting BugsReport bugs to <bugs [at] gnutls.org>. Home page: http://www.gnutls.org CopyrightCopyright © 2001-2014 Free Software…

gnutls_hash – API function Synopsis#include <gnutls/crypto.h> int gnutls_hash(gnutls_hash_hd_t handle, const void * text, size_t textlen); Argumentsgnutls_hash_hd_t handle is a gnutls_cipher_hd_t structure. const void * text the data to hash size_t textlen The length of data to hashDescriptionThis function will hash the given data using the algorithm specified by the context. ReturnsZero or a negative error…

gnutls_handshake_set_timeout – API function Synopsis#include <gnutls/gnutls.h> void gnutls_handshake_set_timeout(gnutls_session_t session, unsigned int ms); Argumentsgnutls_session_t session is a gnutls_session_t structure. unsigned int ms is a timeout value in millisecondsDescriptionThis function sets the timeout for the handshake process to the provided value. Use an ms value of zero to disable timeout, or GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT for a reasonable default value….