192 lines
5.5 KiB
C
192 lines
5.5 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#pragma once
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/*! \file dst/gssapi.h */
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#include <inttypes.h>
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#include <stdbool.h>
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#include <isc/formatcheck.h>
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#include <isc/lang.h>
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#include <isc/types.h>
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#include <dns/types.h>
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typedef void *dns_gss_cred_id_t;
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typedef void *dns_gss_ctx_id_t;
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ISC_LANG_BEGINDECLS
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/***
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*** Types
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***/
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/***
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*** Functions
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***/
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isc_result_t
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dst_gssapi_acquirecred(const dns_name_t *name, bool initiate,
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dns_gss_cred_id_t *cred);
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/*
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* Acquires GSS credentials.
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*
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* Requires:
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* 'name' is a valid name, preferably one known by the GSS provider
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* 'initiate' indicates whether the credentials are for initiating or
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* accepting contexts
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* 'cred' is a pointer to NULL, which will be allocated with the
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* credential handle. Call dst_gssapi_releasecred to free
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* the memory.
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*
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* Returns:
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* ISC_R_SUCCESS msg was successfully updated to include the
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* query to be sent
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* other an error occurred while building the message
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*/
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isc_result_t
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dst_gssapi_releasecred(dns_gss_cred_id_t *cred);
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/*
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* Releases GSS credentials. Calling this function does release the
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* memory allocated for the credential in dst_gssapi_acquirecred()
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*
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* Requires:
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* 'mctx' is a valid memory context
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* 'cred' is a pointer to the credential to be released
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*
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* Returns:
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* ISC_R_SUCCESS credential was released successfully
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* other an error occurred while releaseing
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* the credential
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*/
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isc_result_t
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dst_gssapi_initctx(const dns_name_t *name, isc_buffer_t *intoken,
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isc_buffer_t *outtoken, dns_gss_ctx_id_t *gssctx,
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isc_mem_t *mctx, char **err_message);
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/*
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* Initiates a GSS context.
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*
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* Requires:
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* 'name' is a valid name, preferably one known by the GSS
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* provider
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* 'intoken' is a token received from the acceptor, or NULL if
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* there isn't one
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* 'outtoken' is a buffer to receive the token generated by
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* gss_init_sec_context() to be sent to the acceptor
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* 'context' is a pointer to a valid dns_gss_ctx_id_t
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* (which may have the value DNS_GSS_C_NO_CONTEXT)
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*
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* Returns:
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* ISC_R_SUCCESS msg was successfully updated to include the
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* query to be sent
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* other an error occurred while building the message
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* *err_message optional error message
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*/
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isc_result_t
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dst_gssapi_acceptctx(dns_gss_cred_id_t cred, const char *gssapi_keytab,
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isc_region_t *intoken, isc_buffer_t **outtoken,
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dns_gss_ctx_id_t *context, dns_name_t *principal,
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isc_mem_t *mctx);
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/*
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* Accepts a GSS context.
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*
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* Requires:
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* 'mctx' is a valid memory context
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* 'cred' is the acceptor's valid GSS credential handle
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* 'intoken' is a token received from the initiator
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* 'outtoken' is a pointer a buffer pointer used to return the token
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* generated by gss_accept_sec_context() to be sent to the
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* initiator
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* 'context' is a valid pointer to receive the generated context handle.
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* On the initial call, it should be a pointer to NULL, which
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* will be allocated as a dns_gss_ctx_id_t. Subsequent calls
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* should pass in the handle generated on the first call.
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* Call dst_gssapi_releasecred to delete the context and free
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* the memory.
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*
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* Requires:
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* 'outtoken' to != NULL && *outtoken == NULL.
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*
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* Returns:
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* ISC_R_SUCCESS msg was successfully updated to include the
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* query to be sent
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* DNS_R_CONTINUE transaction still in progress
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* other an error occurred while building the message
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*/
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isc_result_t
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dst_gssapi_deletectx(isc_mem_t *mctx, dns_gss_ctx_id_t *gssctx);
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/*
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* Destroys a GSS context. This function deletes the context from the GSS
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* provider and then frees the memory used by the context pointer.
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*
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* Requires:
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* 'mctx' is a valid memory context
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* 'context' is a valid GSS context
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*
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* Returns:
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* ISC_R_SUCCESS
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*/
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void
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gss_log(int level, const char *fmt, ...) ISC_FORMAT_PRINTF(2, 3);
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/*
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* Logging function for GSS.
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*
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* Requires
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* 'level' is the log level to be used, as an integer
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* 'fmt' is a printf format specifier
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*/
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char *
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gss_error_tostring(uint32_t major, uint32_t minor, char *buf, size_t buflen);
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/*
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* Render a GSS major status/minor status pair into a string
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*
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* Requires:
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* 'major' is a GSS major status code
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* 'minor' is a GSS minor status code
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*
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* Returns:
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* A string containing the text representation of the error codes.
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* Users should copy the string if they wish to keep it.
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*/
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bool
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dst_gssapi_identitymatchesrealmkrb5(const dns_name_t *signer,
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const dns_name_t *name,
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const dns_name_t *realm, bool subdomain);
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/*
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* Compare a "signer" (in the format of a Kerberos-format Kerberos5
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* principal: host/example.com@EXAMPLE.COM) to the realm name stored
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* in "name" (which represents the realm name).
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*
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*/
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bool
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dst_gssapi_identitymatchesrealmms(const dns_name_t *signer,
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const dns_name_t *name,
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const dns_name_t *realm, bool subdomain);
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/*
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* Compare a "signer" (in the format of a Kerberos-format Kerberos5
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* principal: host/example.com@EXAMPLE.COM) to the realm name stored
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* in "name" (which represents the realm name).
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*
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*/
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ISC_LANG_ENDDECLS
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