43858eaf9b
The functions for storing and retrieving GSS OIDs and buffers from
krb5_storage, added in 6554dc69, are generally useful. Move those into private
_gss_mg_XXX() API and update gss_{export,import}_{cred,sec_context} to use them
where appropriate.
148 lines
4.6 KiB
C
148 lines
4.6 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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* 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_import_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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GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
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gss_import_sec_context(OM_uint32 *minor_status,
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const gss_buffer_t interprocess_token,
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gss_ctx_id_t *context_handle)
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{
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OM_uint32 ret = GSS_S_FAILURE, tmp_minor;
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krb5_storage *sp;
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gssapi_mech_interface m;
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struct _gss_context *ctx = NULL;
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gss_buffer_desc buf = GSS_C_EMPTY_BUFFER;
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unsigned char verflags;
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_gss_mg_log(10, "gss-isc called");
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if (!minor_status || !context_handle) {
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*minor_status = EFAULT;
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return GSS_S_FAILURE;
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}
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*minor_status = 0;
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*context_handle = GSS_C_NO_CONTEXT;
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sp = krb5_storage_from_mem(interprocess_token->value,
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interprocess_token->length);
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if (!sp) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_PACKED);
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ctx = calloc(1, sizeof(struct _gss_context));
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if (!ctx) {
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*minor_status = ENOMEM;
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goto failure;
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}
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if (krb5_ret_uint8(sp, &verflags))
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goto failure;
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if ((verflags & EXPORT_CONTEXT_VERSION_MASK) != 0) {
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_gss_mg_log(10, "gss-isc failed, token version %d not recognised",
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(int)(verflags & EXPORT_CONTEXT_VERSION_MASK));
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/* We don't recognise the version */
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goto failure;
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}
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if (verflags & EXPORT_CONTEXT_FLAG_ACCUMULATING) {
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uint32_t target_len;
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if (krb5_ret_uint8(sp, &ctx->gc_initial))
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goto failure;
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if (krb5_ret_uint32(sp, &target_len))
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goto failure;
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ret = _gss_mg_ret_buffer(minor_status, sp, &buf);
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if (ret != GSS_S_COMPLETE)
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goto failure;
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ctx->gc_input.value = calloc(target_len, 1);
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if (ctx->gc_input.value == NULL)
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goto failure;
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ctx->gc_target_len = target_len;
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ctx->gc_input.length = buf.length;
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if (buf.value)
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memcpy(ctx->gc_input.value, buf.value, buf.length);
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gss_release_buffer(&tmp_minor, &buf);
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}
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if (verflags & EXPORT_CONTEXT_FLAG_MECH_CTX) {
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gss_OID mech_oid;
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ret = _gss_mg_ret_oid(minor_status, sp, &mech_oid);
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if (ret != GSS_S_COMPLETE)
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goto failure;
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if (mech_oid == GSS_C_NO_OID) {
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ret = GSS_S_BAD_MECH;
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goto failure;
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}
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m = __gss_get_mechanism(mech_oid);
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if (m == NULL) {
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ret = GSS_S_DEFECTIVE_TOKEN;
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goto failure;
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}
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ctx->gc_mech = m;
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ret = _gss_mg_ret_buffer(minor_status, sp, &buf);
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if (ret != GSS_S_COMPLETE)
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goto failure;
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if (buf.value == NULL) {
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ret = GSS_S_DEFECTIVE_TOKEN;
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goto failure;
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}
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ret = m->gm_import_sec_context(minor_status, &buf, &ctx->gc_ctx);
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if (ret != GSS_S_COMPLETE) {
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_gss_mg_error(m, *minor_status);
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goto failure;
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}
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}
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*context_handle = (gss_ctx_id_t) ctx;
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ctx = NULL;
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ret = GSS_S_COMPLETE;
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failure:
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free(ctx);
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krb5_storage_free(sp);
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_gss_secure_release_buffer(&tmp_minor, &buf);
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return ret;
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}
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