282 lines
8.5 KiB
C
282 lines
8.5 KiB
C
/*-
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* Copyright (c) 2005 Doug Rabson
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. 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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* 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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* 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD: src/lib/libgssapi/gss_init_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
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*/
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#include "mech_locl.h"
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gss_cred_id_t
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_gss_mg_find_mech_cred(
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gss_const_cred_id_t cred_handle,
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gss_const_OID mech_type)
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{
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struct _gss_cred *cred = (struct _gss_cred *)cred_handle;
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struct _gss_mechanism_cred *mc;
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if (cred == NULL)
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return GSS_C_NO_CREDENTIAL;
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HEIM_TAILQ_FOREACH(mc, &cred->gc_mc, gmc_link) {
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if (gss_oid_equal(mech_type, mc->gmc_mech_oid))
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return mc->gmc_cred;
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}
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return GSS_C_NO_CREDENTIAL;
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}
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static void
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log_init_sec_context(struct _gss_context *ctx,
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struct _gss_name *target,
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OM_uint32 req_flags,
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struct _gss_cred *cred,
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gss_OID mech_type,
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gss_buffer_t input_token)
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{
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gssapi_mech_interface m;
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if (ctx)
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m = ctx->gc_mech;
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else
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m = __gss_get_mechanism(mech_type);
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if (m == NULL)
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return;
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mech_type = &m->gm_mech_oid;
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_gss_mg_log(1, "gss_isc: %s %sfirst flags %08x, %s cred, %stoken",
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m->gm_name,
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(ctx == NULL) ? "" : "not ",
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req_flags,
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(cred != NULL) ? "specific" : "default",
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(input_token != NULL && input_token->length) ? "" : "no ");
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_gss_mg_log_cred(1, cred, "gss_isc cred");
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/* print target name */
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_gss_mg_log_name(1, target, mech_type, "gss_isc: target");
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}
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/**
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* As the initiator build a context with an acceptor.
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*
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* Returns in the major
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* - GSS_S_COMPLETE - if the context if build
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* - GSS_S_CONTINUE_NEEDED - if the caller needs to continue another
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* round of gss_i nit_sec_context
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* - error code - any other error code
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*
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* @param minor_status minor status code.
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*
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* @param initiator_cred_handle the credential to use when building
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* the context, if GSS_C_NO_CREDENTIAL is passed, the default
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* credential for the mechanism will be used.
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*
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* @param context_handle a pointer to a context handle, will be
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* returned as long as there is not an error.
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*
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* @param target_name the target name of acceptor, created using
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* gss_import_name(). The name is can be of any name types the
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* mechanism supports, check supported name types with
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* gss_inquire_names_for_mech().
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*
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* @param input_mech_type mechanism type to use, if GSS_C_NO_OID is
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* used, Kerberos (GSS_KRB5_MECHANISM) will be tried. Other
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* available mechanism are listed in the @ref gssapi_mechs_intro
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* section.
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*
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* @param req_flags flags using when building the context, see @ref
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* gssapi_context_flags
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*
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* @param time_req time requested this context should be valid in
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* seconds, common used value is GSS_C_INDEFINITE
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*
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* @param input_chan_bindings Channel bindings used, if not exepected
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* otherwise, used GSS_C_NO_CHANNEL_BINDINGS
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*
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* @param input_token input token sent from the acceptor, for the
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* initial packet the buffer of { NULL, 0 } should be used.
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*
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* @param actual_mech_type the actual mech used, MUST NOT be freed
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* since it pointing to static memory.
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*
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* @param output_token if there is an output token, regardless of
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* complete, continue_needed, or error it should be sent to the
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* acceptor
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*
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* @param ret_flags return what flags was negotitated, caller should
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* check if they are accetable. For example, if
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* GSS_C_MUTUAL_FLAG was negotiated with the acceptor or not.
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*
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* @param time_rec amount of time this context is valid for
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*
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* @returns a gss_error code, see gss_display_status() about printing
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* the error code.
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*
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* @ingroup gssapi
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*/
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GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
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gss_init_sec_context(OM_uint32 * minor_status,
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gss_const_cred_id_t initiator_cred_handle,
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gss_ctx_id_t * context_handle,
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gss_const_name_t target_name,
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const gss_OID input_mech_type,
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OM_uint32 req_flags,
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OM_uint32 time_req,
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const gss_channel_bindings_t input_chan_bindings,
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const gss_buffer_t input_token,
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gss_OID * actual_mech_type,
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gss_buffer_t output_token,
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OM_uint32 * ret_flags,
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OM_uint32 * time_rec)
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{
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OM_uint32 major_status;
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gssapi_mech_interface m;
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gss_const_name_t mn_inner = GSS_C_NO_NAME;
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struct _gss_name *name = (struct _gss_name *) target_name;
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struct _gss_mechanism_name *mn;
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struct _gss_context *ctx = (struct _gss_context *) *context_handle;
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gss_const_cred_id_t cred_handle;
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int allocated_ctx;
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gss_OID mech_type = input_mech_type;
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*minor_status = 0;
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_mg_buffer_zero(output_token);
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if (actual_mech_type)
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*actual_mech_type = GSS_C_NO_OID;
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if (ret_flags)
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*ret_flags = 0;
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if (time_rec)
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*time_rec = 0;
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if (mech_type == GSS_C_NO_OID)
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mech_type = GSS_KRB5_MECHANISM;
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_gss_mg_check_name(target_name);
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if (_gss_mg_log_level(1))
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log_init_sec_context(ctx, name, req_flags,
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(struct _gss_cred *)initiator_cred_handle,
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input_mech_type, input_token);
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/*
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* If we haven't allocated a context yet, do so now and lookup
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* the mechanism switch table. If we have one already, make
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* sure we use the same mechanism switch as before.
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*/
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if (!ctx) {
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ctx = malloc(sizeof(struct _gss_context));
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if (!ctx) {
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*minor_status = ENOMEM;
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return (GSS_S_FAILURE);
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}
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memset(ctx, 0, sizeof(struct _gss_context));
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m = ctx->gc_mech = __gss_get_mechanism(mech_type);
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if (!m) {
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free(ctx);
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*minor_status = 0;
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gss_mg_set_error_string(mech_type, GSS_S_BAD_MECH,
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*minor_status,
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"Unsupported mechanism requested");
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return (GSS_S_BAD_MECH);
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}
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allocated_ctx = 1;
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} else {
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m = ctx->gc_mech;
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mech_type = &ctx->gc_mech->gm_mech_oid;
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allocated_ctx = 0;
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}
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/*
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* Find the MN for this mechanism.
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*/
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if ((m->gm_flags & GM_USE_MG_NAME)) {
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mn_inner = target_name;
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} else {
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major_status = _gss_find_mn(minor_status, name, mech_type, &mn);
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if (major_status != GSS_S_COMPLETE) {
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if (allocated_ctx)
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free(ctx);
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return major_status;
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}
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if (mn)
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mn_inner = mn->gmn_name;
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}
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/*
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* If we have a cred, find the cred for this mechanism.
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*/
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if (m->gm_flags & GM_USE_MG_CRED)
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cred_handle = initiator_cred_handle;
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else
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cred_handle = _gss_mg_find_mech_cred(initiator_cred_handle, mech_type);
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if (initiator_cred_handle != GSS_C_NO_CREDENTIAL &&
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cred_handle == NULL) {
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*minor_status = 0;
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if (allocated_ctx)
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free(ctx);
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gss_mg_set_error_string(mech_type, GSS_S_UNAVAILABLE,
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*minor_status,
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"Credential for the requested mechanism "
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"not found in credential handle");
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return GSS_S_UNAVAILABLE;
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}
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major_status = m->gm_init_sec_context(minor_status,
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cred_handle,
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&ctx->gc_ctx,
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mn_inner,
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mech_type,
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req_flags,
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time_req,
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input_chan_bindings,
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input_token,
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actual_mech_type,
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output_token,
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ret_flags,
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time_rec);
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if (major_status != GSS_S_COMPLETE
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&& major_status != GSS_S_CONTINUE_NEEDED) {
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if (allocated_ctx)
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free(ctx);
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_mg_buffer_zero(output_token);
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_gss_mg_error(m, *minor_status);
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} else {
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*context_handle = (gss_ctx_id_t) ctx;
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}
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_gss_mg_log(1, "gss_isc: %s maj_stat: %d/%d",
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m->gm_name, (int)major_status, (int)*minor_status);
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return (major_status);
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}
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