mech-gssapi.c revision e03ec0b7b9d92551331bc509bcd86920544171d1
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0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * GSSAPI Module
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * Copyright (c) 2005 Jelmer Vernooij <jelmer@samba.org>
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * Related standards:
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * - draft-ietf-sasl-gssapi-03
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * Some parts inspired by an older patch from Colin Walters
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * This program is free software; you can redistribute it and/or modify
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * it under the terms of the GNU Lesser General Public License as published
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * by the Free Software Foundation; either version 2 of the License, or
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen * (at your option) any later version.
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen/* Non-zero flags defined in RFC 2222 */
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic void auth_request_log_gss_error(struct auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_display_status(&minor_status, status_value,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen str_sanitize(status_string.value, (size_t)-1));
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_release_buffer(&minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen } while (message_context != 0);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic struct auth_request *mech_gssapi_auth_new(void)
e03ec0b7b9d92551331bc509bcd86920544171d1Timo Sirainen pool = pool_alloconly_create("gssapi_auth_request", 1024);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request = p_new(pool, struct gssapi_auth_request, 1);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic OM_uint32 obtain_service_credentials(struct auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen str_append(principal_name, t_str_lcase(request->service));
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "Obtaining credentials for %s", str_c(principal_name));
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen inbuf.value = str_c_modifyable(principal_name);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_import_name(&minor_status, &inbuf,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "importing principal name");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_acquire_cred(&minor_status, gss_principal, 0,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "acquiring service credentials");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(request, minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "acquiring service credentials");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen gss_release_name(&minor_status, gss_principal);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenimport_name(struct auth_request *request, void *str, size_t len)
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic void gssapi_sec_context(struct gssapi_auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(&request->auth_request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "processing incoming data");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(&request->auth_request, minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "processing incoming data");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_info(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "security context state completed.");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_info(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "Processed incoming packet correctly, "
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "waiting for another.");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request->auth_request.callback(&request->auth_request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_release_buffer(&minor_status, &outbuf);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic void gssapi_wrap(struct gssapi_auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen /* The clients return data should be empty here */
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen /* Only authentication, no integrity or confidentiality
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen protection (yet?) */
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_wrap(&minor_status, request->gss_ctx, 0,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(&request->auth_request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen GSS_C_GSS_CODE, "sending security layer negotiation");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(&request->auth_request, minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen GSS_C_MECH_CODE, "sending security layer negotiation");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_info(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "Negotiated security layer");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request->auth_request.callback(&request->auth_request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_release_buffer(&minor_status, &outbuf);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request->sasl_gssapi_state = GSS_STATE_UNWRAP;
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenstatic void gssapi_unwrap(struct gssapi_auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_unwrap(&minor_status, request->gss_ctx,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_gss_error(&request->auth_request, major_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "final negotiation: gss_unwrap");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_error(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "Invalid response length");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request->authz_name = import_name(&request->auth_request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen /* XXX (pod): is this check necessary? */
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_error(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "one of authn_name or authz_name not determined");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_compare_name(&minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_log_error(&request->auth_request, "gssapi",
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen "authn_name and authz_name differ: not supported");
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen auth_request_success(&request->auth_request, NULL, 0);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenmech_gssapi_auth_continue(struct auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenmech_gssapi_auth_initial(struct auth_request *request,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen gssapi_request->sasl_gssapi_state = GSS_STATE_SEC_CONTEXT;
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen /* The client should go first */
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen request->callback(request, AUTH_CLIENT_RESULT_CONTINUE,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen mech_gssapi_auth_continue(request, data, data_size);
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainenmech_gssapi_auth_free(struct auth_request *request)
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_delete_sec_context(&minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_release_cred(&minor_status,
0469ed17dafcc56589ce00960a23f4f06817dfb5Timo Sirainen major_status = gss_release_name(&minor_status,