1 /* 2 * tsig.h -- defines for TSIG [RFC2845] 3 * 4 * Copyright (c) 2005-2008, NLnet Labs. All rights reserved. 5 * 6 * See LICENSE for the license. 7 */ 8 9 #ifndef LDNS_TSIG_H 10 #define LDNS_TSIG_H 11 12 #ifdef __cplusplus 13 extern "C" { 14 #endif 15 16 /** 17 * \file 18 * 19 * Defines functions for TSIG usage 20 */ 21 22 23 /** 24 * Contains credentials for TSIG 25 */ 26 typedef struct ldns_tsig_credentials_struct 27 { 28 char *algorithm; 29 char *keyname; 30 char *keydata; 31 /* XXX More eventually. */ 32 } ldns_tsig_credentials; 33 34 char *ldns_tsig_algorithm(ldns_tsig_credentials *); 35 char *ldns_tsig_keyname(ldns_tsig_credentials *); 36 char *ldns_tsig_keydata(ldns_tsig_credentials *); 37 char *ldns_tsig_keyname_clone(ldns_tsig_credentials *); 38 char *ldns_tsig_keydata_clone(ldns_tsig_credentials *); 39 40 /** 41 * verifies the tsig rr for the given packet and key. 42 * The wire must be given too because tsig does not sign normalized packets. 43 * \param[in] pkt the packet to verify 44 * \param[in] wire needed to verify the mac 45 * \param[in] wire_size size of wire 46 * \param[in] key_name the name of the shared key 47 * \param[in] key_data the key in base 64 format 48 * \param[in] mac original mac 49 * \param[in] tsig_timers_only must be zero for the first packet and positive for subsequent packets. If zero, all digest 50 components are used to verify the _mac. If non-zero, only the TSIG timers are used to verify the mac. 51 * \return true if tsig is correct, false if not, or if tsig is not set 52 */ 53 bool ldns_pkt_tsig_verify(ldns_pkt *pkt, uint8_t *wire, size_t wire_size, const char *key_name, const char *key_data, ldns_rdf *mac); 54 55 bool ldns_pkt_tsig_verify_next(ldns_pkt *pkt, uint8_t *wire, size_t wire_size, const char *key_name, const char *key_data, ldns_rdf *mac, 56 int tsig_timers_only); 57 58 /** 59 * creates a tsig rr for the given packet and key. 60 * \param[in] pkt the packet to sign 61 * \param[in] key_name the name of the shared key 62 * \param[in] key_data the key in base 64 format 63 * \param[in] fudge seconds of error permitted in time signed 64 * \param[in] algorithm_name the name of the algorithm used 65 * \param[in] query_mac is added to the digest if not NULL (so NULL is for signing queries, not NULL is for signing answers) 66 * \param[in] tsig_timers_only must be zero for the first packet and positive for subsequent packets. If zero, all digest 67 components are used to create the query_mac. If non-zero, only the TSIG timers are used to create the query_mac. 68 * \return status (OK if success) 69 */ 70 ldns_status ldns_pkt_tsig_sign(ldns_pkt *pkt, const char *key_name, const char *key_data, uint16_t fudge, 71 const char *algorithm_name, ldns_rdf *query_mac); 72 73 ldns_status ldns_pkt_tsig_sign_next(ldns_pkt *pkt, const char *key_name, const char *key_data, uint16_t fudge, 74 const char *algorithm_name, ldns_rdf *query_mac, int tsig_timers_only); 75 76 #ifdef __cplusplus 77 } 78 #endif 79 80 #endif /* LDNS_TSIG_H */ 81