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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ /* include/krb5/certauth_plugin.h - certauth plugin header. */ /* * Copyright (C) 2017 by Red Hat, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Certificate authorization plugin interface. The PKINIT server module uses * this interface to check client certificate attributes after the certificate * signature has been verified. */ #ifndef KRB5_CERTAUTH_PLUGIN_H #define KRB5_CERTAUTH_PLUGIN_H #include <krb5/krb5.h> #include <krb5/plugin.h> /* Abstract module data type. */ typedef struct krb5_certauth_moddata_st *krb5_certauth_moddata; typedef struct _krb5_db_entry_new krb5_db_entry; /* * Optional: Initialize module data. */ typedef krb5_error_code (*krb5_certauth_init_fn)(krb5_context context, krb5_certauth_moddata *moddata_out); /* * Optional: Clean up the module data. */ typedef void (*krb5_certauth_fini_fn)(krb5_context context, krb5_certauth_moddata moddata); /* * Mandatory: * Return 0 if the DER-encoded cert is authorized for PKINIT authentication by * princ; otherwise return one of the following error codes: * - KRB5KDC_ERR_CLIENT_NAME_MISMATCH - incorrect SAN value * - KRB5KDC_ERR_INCONSISTENT_KEY_PURPOSE - incorrect EKU * - KRB5KDC_ERR_CERTIFICATE_MISMATCH - other extension error * - KRB5_PLUGIN_NO_HANDLE - the module has no opinion about cert * * - opts is used by built-in modules to receive internal data, and must be * ignored by other modules. * - db_entry receives the client principal database entry, and can be ignored * by modules that do not link with libkdb5. * - *authinds_out optionally returns a null-terminated list of authentication * indicator strings upon KRB5_PLUGIN_NO_HANDLE or accepted authorization. */ typedef krb5_error_code (*krb5_certauth_authorize_fn)(krb5_context context, krb5_certauth_moddata moddata, const uint8_t *cert, size_t cert_len, krb5_const_principal princ, const void *opts, const krb5_db_entry *db_entry, char ***authinds_out); /* * Free indicators allocated by a module. Mandatory if authorize returns * authentication indicators. */ typedef void (*krb5_certauth_free_indicator_fn)(krb5_context context, krb5_certauth_moddata moddata, char **authinds); typedef struct krb5_certauth_vtable_st { char *name; krb5_certauth_init_fn init; krb5_certauth_fini_fn fini; krb5_certauth_authorize_fn authorize; krb5_certauth_free_indicator_fn free_ind; } *krb5_certauth_vtable; #endif /* KRB5_CERTAUTH_PLUGIN_H */