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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#ifndef DST_GSSAPI_H
#define DST_GSSAPI_H 1
/*! \file dst/gssapi.h */
#include <isc/formatcheck.h>
#include <isc/lang.h>
#include <isc/platform.h>
#include <isc/types.h>
#include <dns/types.h>
#ifdef GSSAPI
#ifdef WIN32
/*
* MSVC does not like macros in #include lines.
*/
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_krb5.h>
#else
#include ISC_PLATFORM_GSSAPIHEADER
#ifdef ISC_PLATFORM_GSSAPI_KRB5_HEADER
#include ISC_PLATFORM_GSSAPI_KRB5_HEADER
#endif
#endif
#ifndef GSS_SPNEGO_MECHANISM
#define GSS_SPNEGO_MECHANISM ((void*)0)
#endif
#endif
ISC_LANG_BEGINDECLS
/***
*** Types
***/
/***
*** Functions
***/
isc_result_t
dst_gssapi_acquirecred(dns_name_t *name, isc_boolean_t initiate,
gss_cred_id_t *cred);
/*
* Acquires GSS credentials.
*
* Requires:
* 'name' is a valid name, preferably one known by the GSS provider
* 'initiate' indicates whether the credentials are for initiating or
* accepting contexts
* 'cred' is a pointer to NULL, which will be allocated with the
* credential handle. Call dst_gssapi_releasecred to free
* the memory.
*
* Returns:
* ISC_R_SUCCESS msg was successfully updated to include the
* query to be sent
* other an error occurred while building the message
*/
isc_result_t
dst_gssapi_releasecred(gss_cred_id_t *cred);
/*
* Releases GSS credentials. Calling this function does release the
* memory allocated for the credential in dst_gssapi_acquirecred()
*
* Requires:
* 'mctx' is a valid memory context
* 'cred' is a pointer to the credential to be released
*
* Returns:
* ISC_R_SUCCESS credential was released successfully
* other an error occurred while releaseing
* the credential
*/
isc_result_t
dst_gssapi_initctx(dns_name_t *name, isc_buffer_t *intoken,
isc_buffer_t *outtoken, gss_ctx_id_t *gssctx,
isc_mem_t *mctx, char **err_message);
/*
* Initiates a GSS context.
*
* Requires:
* 'name' is a valid name, preferably one known by the GSS
* provider
* 'intoken' is a token received from the acceptor, or NULL if
* there isn't one
* 'outtoken' is a buffer to receive the token generated by
* gss_init_sec_context() to be sent to the acceptor
* 'context' is a pointer to a valid gss_ctx_id_t
* (which may have the value GSS_C_NO_CONTEXT)
*
* Returns:
* ISC_R_SUCCESS msg was successfully updated to include the
* query to be sent
* other an error occurred while building the message
* *err_message optional error message
*/
isc_result_t
dst_gssapi_acceptctx(gss_cred_id_t cred,
const char *gssapi_keytab,
isc_region_t *intoken, isc_buffer_t **outtoken,
gss_ctx_id_t *context, dns_name_t *principal,
isc_mem_t *mctx);
/*
* Accepts a GSS context.
*
* Requires:
* 'mctx' is a valid memory context
* 'cred' is the acceptor's valid GSS credential handle
* 'intoken' is a token received from the initiator
* 'outtoken' is a pointer a buffer pointer used to return the token
* generated by gss_accept_sec_context() to be sent to the
* initiator
* 'context' is a valid pointer to receive the generated context handle.
* On the initial call, it should be a pointer to NULL, which
* will be allocated as a gss_ctx_id_t. Subsequent calls
* should pass in the handle generated on the first call.
* Call dst_gssapi_releasecred to delete the context and free
* the memory.
*
* Requires:
* 'outtoken' to != NULL && *outtoken == NULL.
*
* Returns:
* ISC_R_SUCCESS msg was successfully updated to include the
* query to be sent
* DNS_R_CONTINUE transaction still in progress
* other an error occurred while building the message
*/
isc_result_t
dst_gssapi_deletectx(isc_mem_t *mctx, gss_ctx_id_t *gssctx);
/*
* Destroys a GSS context. This function deletes the context from the GSS
* provider and then frees the memory used by the context pointer.
*
* Requires:
* 'mctx' is a valid memory context
* 'context' is a valid GSS context
*
* Returns:
* ISC_R_SUCCESS
*/
void
gss_log(int level, const char *fmt, ...)
ISC_FORMAT_PRINTF(2, 3);
/*
* Logging function for GSS.
*
* Requires
* 'level' is the log level to be used, as an integer
* 'fmt' is a printf format specifier
*/
char *
gss_error_tostring(isc_uint32_t major, isc_uint32_t minor,
char *buf, size_t buflen);
/*
* Render a GSS major status/minor status pair into a string
*
* Requires:
* 'major' is a GSS major status code
* 'minor' is a GSS minor status code
*
* Returns:
* A string containing the text representation of the error codes.
* Users should copy the string if they wish to keep it.
*/
isc_boolean_t
dst_gssapi_identitymatchesrealmkrb5(dns_name_t *signer, dns_name_t *name,
dns_name_t *realm);
/*
* Compare a "signer" (in the format of a Kerberos-format Kerberos5
* principal: host/example.com@EXAMPLE.COM) to the realm name stored
* in "name" (which represents the realm name).
*
*/
isc_boolean_t
dst_gssapi_identitymatchesrealmms(dns_name_t *signer, dns_name_t *name,
dns_name_t *realm);
/*
* Compare a "signer" (in the format of a Kerberos-format Kerberos5
* principal: host/example.com@EXAMPLE.COM) to the realm name stored
* in "name" (which represents the realm name).
*
*/
ISC_LANG_ENDDECLS
#endif /* DST_GSSAPI_H */