gss: SAnon - the Simple Anonymous GSS-API mechanism
Add support for SAnon, a simple key agreement protocol that provides no authentication of initiator or acceptor using x25519 ECDH key exchange. See doc/standardization/draft-howard-gss-sanon-xx.txt for a protocol description.
This commit is contained in:
Luke Howard
committed by
Nicolas Williams
Nicolas Williams
parent
beda11a079
commit
4a7eb74374
269
lib/gssapi/sanon/external.c
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269
lib/gssapi/sanon/external.c
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/*
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* Copyright (c) 2006-2020 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sanon_locl.h"
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static uint8_t anonymous_identity;
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gss_name_t
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_gss_sanon_anonymous_identity = (gss_name_t)&anonymous_identity;
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gss_cred_id_t
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_gss_sanon_anonymous_cred = (gss_cred_id_t)&anonymous_identity;
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static uint8_t non_anonymous_identity;
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gss_name_t
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_gss_sanon_non_anonymous_identity = (gss_name_t)&non_anonymous_identity;
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gss_cred_id_t
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_gss_sanon_non_anonymous_cred = (gss_cred_id_t)&non_anonymous_identity;
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static gss_buffer_desc wellknown_user_name = {
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SANON_WELLKNOWN_USER_NAME_LEN,
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SANON_WELLKNOWN_USER_NAME
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};
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gss_buffer_t
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_gss_sanon_wellknown_user_name = &wellknown_user_name;
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static gss_buffer_desc wellknown_service_name = {
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SANON_WELLKNOWN_SERVICE_NAME_LEN,
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SANON_WELLKNOWN_SERVICE_NAME
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};
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gss_buffer_t
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_gss_sanon_wellknown_service_name = &wellknown_service_name;
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static gss_mo_desc sanon_mo[] = {
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{
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GSS_C_MA_MECH_NAME,
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GSS_MO_MA,
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"Mechanism name",
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rk_UNCONST("SANON-X25519"),
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_gss_mo_get_ctx_as_string,
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NULL
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},
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{
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GSS_C_MA_MECH_DESCRIPTION,
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GSS_MO_MA,
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"Mechanism description",
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rk_UNCONST("Heimdal Simple Anonymous (X25519) Mechanism"),
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_gss_mo_get_ctx_as_string,
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NULL
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},
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{
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GSS_C_MA_MECH_CONCRETE,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_ITOK_FRAMED,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_AUTH_INIT_ANON,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_AUTH_TARG_ANON,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_INTEG_PROT,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_CONF_PROT,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_MIC,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_WRAP,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_REPLAY_DET,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_OOS_DET,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_CBINDINGS,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_PFS,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_CTX_TRANS,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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},
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{
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GSS_C_MA_NEGOEX_AND_SPNEGO,
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GSS_MO_MA,
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NULL,
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NULL,
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NULL,
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NULL
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}
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};
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static gssapi_mech_interface_desc sanon_mech = {
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GMI_VERSION,
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"sanon-x25519",
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{ 10, rk_UNCONST("\x2b\x06\x01\x04\x01\xa9\x4a\x1a\x01\x6e") },
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0,
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NULL,
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_gss_sanon_release_cred,
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_gss_sanon_init_sec_context,
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_gss_sanon_accept_sec_context,
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_gss_sanon_process_context_token,
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_gss_sanon_delete_sec_context,
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_gss_sanon_context_time,
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_gss_sanon_get_mic,
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_gss_sanon_verify_mic,
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_gss_sanon_wrap,
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_gss_sanon_unwrap,
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_gss_sanon_display_status,
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NULL, /* gm_indicate_mechs */
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_gss_sanon_compare_name,
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_gss_sanon_display_name,
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_gss_sanon_import_name,
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_gss_sanon_export_name,
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_gss_sanon_release_name,
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_gss_sanon_inquire_cred,
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_gss_sanon_inquire_context,
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_gss_sanon_wrap_size_limit,
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NULL, /* gm_add_cred */
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_gss_sanon_inquire_cred_by_mech,
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_gss_sanon_export_sec_context,
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_gss_sanon_import_sec_context,
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_gss_sanon_inquire_names_for_mech,
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_gss_sanon_inquire_mechs_for_name,
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_gss_sanon_canonicalize_name,
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_gss_sanon_duplicate_name,
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_gss_sanon_inquire_sec_context_by_oid,
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NULL, /* gm_inquire_cred_by_oid */
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NULL, /* gm_set_sec_context_option */
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NULL, /* gm_set_cred_option */
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_gss_sanon_pseudo_random,
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_gss_sanon_wrap_iov,
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_gss_sanon_unwrap_iov,
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_gss_sanon_wrap_iov_length,
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NULL, /* gm_store_cred */
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_gss_sanon_export_cred,
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_gss_sanon_import_cred,
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_gss_sanon_acquire_cred_from,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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sanon_mo,
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sizeof(sanon_mo) / sizeof(sanon_mo[0]),
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NULL, /* gm_localname */
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NULL, /* gm_authorize_localname */
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NULL, /* gm_display_name_ext */
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NULL, /* gm_inquire_name */
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NULL, /* gm_get_name_attribute */
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NULL, /* gm_set_name_attribute */
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NULL, /* gm_delete_name_attribute */
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NULL, /* gm_export_name_composite */
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_gss_sanon_duplicate_cred,
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_gss_sanon_add_cred_from,
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NULL, /* gm_store_cred_into */
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_gssspi_sanon_query_mechanism_info,
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_gssspi_sanon_query_meta_data,
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_gssspi_sanon_exchange_meta_data,
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NULL, /* gm_store_cred_into2 */
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NULL, /* gm_compat */
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};
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gssapi_mech_interface
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__gss_sanon_initialize(void)
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{
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return &sanon_mech;
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}
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