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Diffstat (limited to 'lib/dns/include/dst/gssapi.h')
| -rw-r--r-- | lib/dns/include/dst/gssapi.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/lib/dns/include/dst/gssapi.h b/lib/dns/include/dst/gssapi.h new file mode 100644 index 0000000..494b4b0 --- /dev/null +++ b/lib/dns/include/dst/gssapi.h @@ -0,0 +1,192 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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. + */ + +#pragma once + +/*! \file dst/gssapi.h */ + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/formatcheck.h> +#include <isc/lang.h> +#include <isc/types.h> + +#include <dns/types.h> + +typedef void *dns_gss_cred_id_t; +typedef void *dns_gss_ctx_id_t; + +ISC_LANG_BEGINDECLS + +/*** + *** Types + ***/ + +/*** + *** Functions + ***/ + +isc_result_t +dst_gssapi_acquirecred(const dns_name_t *name, bool initiate, + dns_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(dns_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(const dns_name_t *name, isc_buffer_t *intoken, + isc_buffer_t *outtoken, dns_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 dns_gss_ctx_id_t + * (which may have the value DNS_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(dns_gss_cred_id_t cred, const char *gssapi_keytab, + isc_region_t *intoken, isc_buffer_t **outtoken, + dns_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 dns_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, dns_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 |