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gssapi.h
/* * 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 https://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 <inttypes.h> #include <stdbool.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 #endif ISC_LANG_BEGINDECLS /*** *** Types ***/ /*** *** Functions ***/ isc_result_t dst_gssapi_acquirecred(dns_name_t *name, bool 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(uint32_t major, 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. */ bool dst_gssapi_identitymatchesrealmkrb5(const dns_name_t *signer, const dns_name_t *name, const dns_name_t *realm, bool subdomain); /* * 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). * */ bool dst_gssapi_identitymatchesrealmms(const dns_name_t *signer, const dns_name_t *name, const dns_name_t *realm, bool subdomain); /* * 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 */
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