From f50ae72ec3417cae55dd4e085991c01af9fdc5f1 Mon Sep 17 00:00:00 2001 From: Martin Nagy Date: Wed, 11 Feb 2009 20:37:59 +0100 Subject: Initial commit --- lib/dns/include/dns/tsig.h | 257 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 257 insertions(+) create mode 100644 lib/dns/include/dns/tsig.h (limited to 'lib/dns/include/dns/tsig.h') diff --git a/lib/dns/include/dns/tsig.h b/lib/dns/include/dns/tsig.h new file mode 100644 index 0000000..e8c0e2c --- /dev/null +++ b/lib/dns/include/dns/tsig.h @@ -0,0 +1,257 @@ +/* + * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1999-2002 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: tsig.h,v 1.51 2007/06/19 23:47:17 tbox Exp $ */ + +#ifndef DNS_TSIG_H +#define DNS_TSIG_H 1 + +/*! \file dns/tsig.h */ + +#include +#include +#include +#include + +#include +#include + +#include + +/* + * Algorithms. + */ +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacmd5_name; +#define DNS_TSIG_HMACMD5_NAME dns_tsig_hmacmd5_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_gssapi_name; +#define DNS_TSIG_GSSAPI_NAME dns_tsig_gssapi_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_gssapims_name; +#define DNS_TSIG_GSSAPIMS_NAME dns_tsig_gssapims_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacsha1_name; +#define DNS_TSIG_HMACSHA1_NAME dns_tsig_hmacsha1_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacsha224_name; +#define DNS_TSIG_HMACSHA224_NAME dns_tsig_hmacsha224_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacsha256_name; +#define DNS_TSIG_HMACSHA256_NAME dns_tsig_hmacsha256_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacsha384_name; +#define DNS_TSIG_HMACSHA384_NAME dns_tsig_hmacsha384_name +LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_tsig_hmacsha512_name; +#define DNS_TSIG_HMACSHA512_NAME dns_tsig_hmacsha512_name + +/*% + * Default fudge value. + */ +#define DNS_TSIG_FUDGE 300 + +struct dns_tsig_keyring { + dns_rbt_t *keys; + unsigned int writecount; + isc_rwlock_t lock; + isc_mem_t *mctx; +}; + +struct dns_tsigkey { + /* Unlocked */ + unsigned int magic; /*%< Magic number. */ + isc_mem_t *mctx; + dst_key_t *key; /*%< Key */ + dns_name_t name; /*%< Key name */ + dns_name_t *algorithm; /*%< Algorithm name */ + dns_name_t *creator; /*%< name that created secret */ + isc_boolean_t generated; /*%< was this generated? */ + isc_stdtime_t inception; /*%< start of validity period */ + isc_stdtime_t expire; /*%< end of validity period */ + dns_tsig_keyring_t *ring; /*%< the enclosing keyring */ + isc_refcount_t refs; /*%< reference counter */ +}; + +#define dns_tsigkey_identity(tsigkey) \ + ((tsigkey) == NULL ? NULL : \ + (tsigkey)->generated ? ((tsigkey)->creator) : \ + (&((tsigkey)->name))) + +ISC_LANG_BEGINDECLS + +isc_result_t +dns_tsigkey_create(dns_name_t *name, dns_name_t *algorithm, + unsigned char *secret, int length, isc_boolean_t generated, + dns_name_t *creator, isc_stdtime_t inception, + isc_stdtime_t expire, isc_mem_t *mctx, + dns_tsig_keyring_t *ring, dns_tsigkey_t **key); + +isc_result_t +dns_tsigkey_createfromkey(dns_name_t *name, dns_name_t *algorithm, + dst_key_t *dstkey, isc_boolean_t generated, + dns_name_t *creator, isc_stdtime_t inception, + isc_stdtime_t expire, isc_mem_t *mctx, + dns_tsig_keyring_t *ring, dns_tsigkey_t **key); +/*%< + * Creates a tsig key structure and saves it in the keyring. If key is + * not NULL, *key will contain a copy of the key. The keys validity + * period is specified by (inception, expire), and will not expire if + * inception == expire. If the key was generated, the creating identity, + * if there is one, should be in the creator parameter. Specifying an + * unimplemented algorithm will cause failure only if dstkey != NULL; this + * allows a transient key with an invalid algorithm to exist long enough + * to generate a BADKEY response. + * + * Requires: + *\li 'name' is a valid dns_name_t + *\li 'algorithm' is a valid dns_name_t + *\li 'secret' is a valid pointer + *\li 'length' is an integer >= 0 + *\li 'key' is a valid dst key or NULL + *\li 'creator' points to a valid dns_name_t or is NULL + *\li 'mctx' is a valid memory context + *\li 'ring' is a valid TSIG keyring or NULL + *\li 'key' or '*key' must be NULL + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_EXISTS - a key with this name already exists + *\li #ISC_R_NOTIMPLEMENTED - algorithm is not implemented + *\li #ISC_R_NOMEMORY + */ + +void +dns_tsigkey_attach(dns_tsigkey_t *source, dns_tsigkey_t **targetp); +/*%< + * Attach '*targetp' to 'source'. + * + * Requires: + *\li 'key' is a valid TSIG key + * + * Ensures: + *\li *targetp is attached to source. + */ + +void +dns_tsigkey_detach(dns_tsigkey_t **keyp); +/*%< + * Detaches from the tsig key structure pointed to by '*key'. + * + * Requires: + *\li 'keyp' is not NULL and '*keyp' is a valid TSIG key + * + * Ensures: + *\li 'keyp' points to NULL + */ + +void +dns_tsigkey_setdeleted(dns_tsigkey_t *key); +/*%< + * Prevents this key from being used again. It will be deleted when + * no references exist. + * + * Requires: + *\li 'key' is a valid TSIG key on a keyring + */ + +isc_result_t +dns_tsig_sign(dns_message_t *msg); +/*%< + * Generates a TSIG record for this message + * + * Requires: + *\li 'msg' is a valid message + *\li 'msg->tsigkey' is a valid TSIG key + *\li 'msg->tsig' is NULL + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #ISC_R_NOSPACE + *\li #DNS_R_EXPECTEDTSIG + * - this is a response & msg->querytsig is NULL + */ + +isc_result_t +dns_tsig_verify(isc_buffer_t *source, dns_message_t *msg, + dns_tsig_keyring_t *ring1, dns_tsig_keyring_t *ring2); +/*%< + * Verifies the TSIG record in this message + * + * Requires: + *\li 'source' is a valid buffer containing the unparsed message + *\li 'msg' is a valid message + *\li 'msg->tsigkey' is a valid TSIG key if this is a response + *\li 'msg->tsig' is NULL + *\li 'msg->querytsig' is not NULL if this is a response + *\li 'ring1' and 'ring2' are each either a valid keyring or NULL + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #DNS_R_EXPECTEDTSIG - A TSIG was expected but not seen + *\li #DNS_R_UNEXPECTEDTSIG - A TSIG was seen but not expected + *\li #DNS_R_TSIGERRORSET - the TSIG verified but ->error was set + * and this is a query + *\li #DNS_R_CLOCKSKEW - the TSIG failed to verify because of + * the time was out of the allowed range. + *\li #DNS_R_TSIGVERIFYFAILURE - the TSIG failed to verify + *\li #DNS_R_EXPECTEDRESPONSE - the message was set over TCP and + * should have been a response, + * but was not. + */ + +isc_result_t +dns_tsigkey_find(dns_tsigkey_t **tsigkey, dns_name_t *name, + dns_name_t *algorithm, dns_tsig_keyring_t *ring); +/*%< + * Returns the TSIG key corresponding to this name and (possibly) + * algorithm. Also increments the key's reference counter. + * + * Requires: + *\li 'tsigkey' is not NULL + *\li '*tsigkey' is NULL + *\li 'name' is a valid dns_name_t + *\li 'algorithm' is a valid dns_name_t or NULL + *\li 'ring' is a valid keyring + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOTFOUND + */ + + +isc_result_t +dns_tsigkeyring_create(isc_mem_t *mctx, dns_tsig_keyring_t **ringp); +/*%< + * Create an empty TSIG key ring. + * + * Requires: + *\li 'mctx' is not NULL + *\li 'ringp' is not NULL, and '*ringp' is NULL + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + */ + + +void +dns_tsigkeyring_destroy(dns_tsig_keyring_t **ringp); +/*%< + * Destroy a TSIG key ring. + * + * Requires: + *\li 'ringp' is not NULL + */ + +ISC_LANG_ENDDECLS + +#endif /* DNS_TSIG_H */ -- cgit